xserver mesa xkeyboard-config git update 30 Apr 2011

1 files changed, 2924 insertions, 2923 deletions

diff --git a/mesalib/src/mesa/drivers/common/meta.c b/mesalib/src/mesa/drivers/common/meta.c
index a3964798b..06d4337f8 100644
--- a/mesalib/src/mesa/drivers/common/meta.c
+++ b/mesalib/src/mesa/drivers/common/meta.c
@@ -1,2923 +1,2924 @@
-/*
- * Mesa 3-D graphics library
- * Version:  7.6
- *
- * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-/**
- * Meta operations.  Some GL operations can be expressed in terms of
- * other GL operations.  For example, glBlitFramebuffer() can be done
- * with texture mapping and glClear() can be done with polygon rendering.
- *
- * \author Brian Paul
- */
-
-
-#include "main/glheader.h"
-#include "main/mtypes.h"
-#include "main/imports.h"
-#include "main/arbprogram.h"
-#include "main/arrayobj.h"
-#include "main/blend.h"
-#include "main/bufferobj.h"
-#include "main/buffers.h"
-#include "main/colortab.h"
-#include "main/condrender.h"
-#include "main/depth.h"
-#include "main/enable.h"
-#include "main/fbobject.h"
-#include "main/formats.h"
-#include "main/image.h"
-#include "main/macros.h"
-#include "main/matrix.h"
-#include "main/mipmap.h"
-#include "main/pbo.h"
-#include "main/polygon.h"
-#include "main/readpix.h"
-#include "main/scissor.h"
-#include "main/shaderapi.h"
-#include "main/shaderobj.h"
-#include "main/state.h"
-#include "main/stencil.h"
-#include "main/texobj.h"
-#include "main/texenv.h"
-#include "main/teximage.h"
-#include "main/texparam.h"
-#include "main/texstate.h"
-#include "main/varray.h"
-#include "main/viewport.h"
-#include "program/program.h"
-#include "swrast/swrast.h"
-#include "drivers/common/meta.h"
-
-
-/** Return offset in bytes of the field within a vertex struct */
-#define OFFSET(FIELD) ((void *) offsetof(struct vertex, FIELD))
-
-
-/**
- * Flags passed to _mesa_meta_begin().
- */
-/*@{*/
-#define META_ALL              ~0x0
-#define META_ALPHA_TEST        0x1
-#define META_BLEND             0x2  /**< includes logicop */
-#define META_COLOR_MASK        0x4
-#define META_DEPTH_TEST        0x8
-#define META_FOG              0x10
-#define META_PIXEL_STORE      0x20
-#define META_PIXEL_TRANSFER   0x40
-#define META_RASTERIZATION    0x80
-#define META_SCISSOR         0x100
-#define META_SHADER          0x200
-#define META_STENCIL_TEST    0x400
-#define META_TRANSFORM       0x800 /**< modelview, projection, clip planes */
-#define META_TEXTURE        0x1000
-#define META_VERTEX         0x2000
-#define META_VIEWPORT       0x4000
-#define META_CLAMP_FRAGMENT_COLOR 0x8000
-#define META_CLAMP_VERTEX_COLOR 0x10000
-#define META_CONDITIONAL_RENDER 0x20000
-/*@}*/
-
-
-/**
- * State which we may save/restore across meta ops.
- * XXX this may be incomplete...
- */
-struct save_state
-{
-   GLbitfield SavedState;  /**< bitmask of META_* flags */
-
-   /** META_ALPHA_TEST */
-   GLboolean AlphaEnabled;
-   GLenum AlphaFunc;
-   GLclampf AlphaRef;
-
-   /** META_BLEND */
-   GLbitfield BlendEnabled;
-   GLboolean ColorLogicOpEnabled;
-
-   /** META_COLOR_MASK */
-   GLubyte ColorMask[MAX_DRAW_BUFFERS][4];
-
-   /** META_DEPTH_TEST */
-   struct gl_depthbuffer_attrib Depth;
-
-   /** META_FOG */
-   GLboolean Fog;
-
-   /** META_PIXEL_STORE */
-   struct gl_pixelstore_attrib Pack, Unpack;
-
-   /** META_PIXEL_TRANSFER */
-   GLfloat RedBias, RedScale;
-   GLfloat GreenBias, GreenScale;
-   GLfloat BlueBias, BlueScale;
-   GLfloat AlphaBias, AlphaScale;
-   GLfloat DepthBias, DepthScale;
-   GLboolean MapColorFlag;
-
-   /** META_RASTERIZATION */
-   GLenum FrontPolygonMode, BackPolygonMode;
-   GLboolean PolygonOffset;
-   GLboolean PolygonSmooth;
-   GLboolean PolygonStipple;
-   GLboolean PolygonCull;
-
-   /** META_SCISSOR */
-   struct gl_scissor_attrib Scissor;
-
-   /** META_SHADER */
-   GLboolean VertexProgramEnabled;
-   struct gl_vertex_program *VertexProgram;
-   GLboolean FragmentProgramEnabled;
-   struct gl_fragment_program *FragmentProgram;
-   struct gl_shader_program *VertexShader;
-   struct gl_shader_program *GeometryShader;
-   struct gl_shader_program *FragmentShader;
-   struct gl_shader_program *ActiveShader;
-
-   /** META_STENCIL_TEST */
-   struct gl_stencil_attrib Stencil;
-
-   /** META_TRANSFORM */
-   GLenum MatrixMode;
-   GLfloat ModelviewMatrix[16];
-   GLfloat ProjectionMatrix[16];
-   GLfloat TextureMatrix[16];
-   GLbitfield ClipPlanesEnabled;
-
-   /** META_TEXTURE */
-   GLuint ActiveUnit;
-   GLuint ClientActiveUnit;
-   /** for unit[0] only */
-   struct gl_texture_object *CurrentTexture[NUM_TEXTURE_TARGETS];
-   /** mask of TEXTURE_2D_BIT, etc */
-   GLbitfield TexEnabled[MAX_TEXTURE_UNITS];
-   GLbitfield TexGenEnabled[MAX_TEXTURE_UNITS];
-   GLuint EnvMode;  /* unit[0] only */
-
-   /** META_VERTEX */
-   struct gl_array_object *ArrayObj;
-   struct gl_buffer_object *ArrayBufferObj;
-
-   /** META_VIEWPORT */
-   GLint ViewportX, ViewportY, ViewportW, ViewportH;
-   GLclampd DepthNear, DepthFar;
-
-   /** META_CLAMP_FRAGMENT_COLOR */
-   GLenum ClampFragmentColor;
-
-   /** META_CLAMP_VERTEX_COLOR */
-   GLenum ClampVertexColor;
-
-   /** META_CONDITIONAL_RENDER */
-   struct gl_query_object *CondRenderQuery;
-   GLenum CondRenderMode;
-
-   /** Miscellaneous (always disabled) */
-   GLboolean Lighting;
-};
-
-
-/**
- * Temporary texture used for glBlitFramebuffer, glDrawPixels, etc.
- * This is currently shared by all the meta ops.  But we could create a
- * separate one for each of glDrawPixel, glBlitFramebuffer, glCopyPixels, etc.
- */
-struct temp_texture
-{
-   GLuint TexObj;
-   GLenum Target;         /**< GL_TEXTURE_2D or GL_TEXTURE_RECTANGLE */
-   GLsizei MinSize;       /**< Min texture size to allocate */
-   GLsizei MaxSize;       /**< Max possible texture size */
-   GLboolean NPOT;        /**< Non-power of two size OK? */
-   GLsizei Width, Height; /**< Current texture size */
-   GLenum IntFormat;
-   GLfloat Sright, Ttop;  /**< right, top texcoords */
-};
-
-
-/**
- * State for glBlitFramebufer()
- */
-struct blit_state
-{
-   GLuint ArrayObj;
-   GLuint VBO;
-   GLuint DepthFP;
-};
-
-
-/**
- * State for glClear()
- */
-struct clear_state
-{
-   GLuint ArrayObj;
-   GLuint VBO;
-};
-
-
-/**
- * State for glCopyPixels()
- */
-struct copypix_state
-{
-   GLuint ArrayObj;
-   GLuint VBO;
-};
-
-
-/**
- * State for glDrawPixels()
- */
-struct drawpix_state
-{
-   GLuint ArrayObj;
-
-   GLuint StencilFP;  /**< Fragment program for drawing stencil images */
-   GLuint DepthFP;  /**< Fragment program for drawing depth images */
-};
-
-
-/**
- * State for glBitmap()
- */
-struct bitmap_state
-{
-   GLuint ArrayObj;
-   GLuint VBO;
-   struct temp_texture Tex;  /**< separate texture from other meta ops */
-};
-
-
-/**
- * State for _mesa_meta_generate_mipmap()
- */
-struct gen_mipmap_state
-{
-   GLuint ArrayObj;
-   GLuint VBO;
-   GLuint FBO;
-};
-
-#define MAX_META_OPS_DEPTH      2
-/**
- * All per-context meta state.
- */
-struct gl_meta_state
-{
-   /** Stack of state saved during meta-ops */
-   struct save_state Save[MAX_META_OPS_DEPTH];
-   /** Save stack depth */
-   GLuint SaveStackDepth;
-
-   struct temp_texture TempTex;
-
-   struct blit_state Blit;    /**< For _mesa_meta_BlitFramebuffer() */
-   struct clear_state Clear;  /**< For _mesa_meta_Clear() */
-   struct copypix_state CopyPix;  /**< For _mesa_meta_CopyPixels() */
-   struct drawpix_state DrawPix;  /**< For _mesa_meta_DrawPixels() */
-   struct bitmap_state Bitmap;    /**< For _mesa_meta_Bitmap() */
-   struct gen_mipmap_state Mipmap;    /**< For _mesa_meta_GenerateMipmap() */
-};
-
-
-/**
- * Initialize meta-ops for a context.
- * To be called once during context creation.
- */
-void
-_mesa_meta_init(struct gl_context *ctx)
-{
-   ASSERT(!ctx->Meta);
-
-   ctx->Meta = CALLOC_STRUCT(gl_meta_state);
-}
-
-
-/**
- * Free context meta-op state.
- * To be called once during context destruction.
- */
-void
-_mesa_meta_free(struct gl_context *ctx)
-{
-   /* Note: Any textures, VBOs, etc, that we allocate should get
-    * freed by the normal context destruction code.  But this would be
-    * the place to free other meta data someday.
-    */
-   free(ctx->Meta);
-   ctx->Meta = NULL;
-}
-
-
-/**
- * Enter meta state.  This is like a light-weight version of glPushAttrib
- * but it also resets most GL state back to default values.
- *
- * \param state  bitmask of META_* flags indicating which attribute groups
- *               to save and reset to their defaults
- */
-static void
-_mesa_meta_begin(struct gl_context *ctx, GLbitfield state)
-{
-   struct save_state *save;
-
-   /* hope MAX_META_OPS_DEPTH is large enough */
-   assert(ctx->Meta->SaveStackDepth < MAX_META_OPS_DEPTH);
-
-   save = &ctx->Meta->Save[ctx->Meta->SaveStackDepth++];
-   memset(save, 0, sizeof(*save));
-   save->SavedState = state;
-
-   if (state & META_ALPHA_TEST) {
-      save->AlphaEnabled = ctx->Color.AlphaEnabled;
-      save->AlphaFunc = ctx->Color.AlphaFunc;
-      save->AlphaRef = ctx->Color.AlphaRef;
-      if (ctx->Color.AlphaEnabled)
-         _mesa_set_enable(ctx, GL_ALPHA_TEST, GL_FALSE);
-   }
-
-   if (state & META_BLEND) {
-      save->BlendEnabled = ctx->Color.BlendEnabled;
-      if (ctx->Color.BlendEnabled) {
-         if (ctx->Extensions.EXT_draw_buffers2) {
-            GLuint i;
-            for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
-               _mesa_set_enablei(ctx, GL_BLEND, i, GL_FALSE);
-            }
-         }
-         else {
-            _mesa_set_enable(ctx, GL_BLEND, GL_FALSE);
-         }
-      }
-      save->ColorLogicOpEnabled = ctx->Color.ColorLogicOpEnabled;
-      if (ctx->Color.ColorLogicOpEnabled)
-         _mesa_set_enable(ctx, GL_COLOR_LOGIC_OP, GL_FALSE);
-   }
-
-   if (state & META_COLOR_MASK) {
-      memcpy(save->ColorMask, ctx->Color.ColorMask,
-             sizeof(ctx->Color.ColorMask));
-      if (!ctx->Color.ColorMask[0][0] ||
-          !ctx->Color.ColorMask[0][1] ||
-          !ctx->Color.ColorMask[0][2] ||
-          !ctx->Color.ColorMask[0][3])
-         _mesa_ColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
-   }
-
-   if (state & META_DEPTH_TEST) {
-      save->Depth = ctx->Depth; /* struct copy */
-      if (ctx->Depth.Test)
-         _mesa_set_enable(ctx, GL_DEPTH_TEST, GL_FALSE);
-   }
-
-   if (state & META_FOG) {
-      save->Fog = ctx->Fog.Enabled;
-      if (ctx->Fog.Enabled)
-         _mesa_set_enable(ctx, GL_FOG, GL_FALSE);
-   }
-
-   if (state & META_PIXEL_STORE) {
-      save->Pack = ctx->Pack;
-      save->Unpack = ctx->Unpack;
-      ctx->Pack = ctx->DefaultPacking;
-      ctx->Unpack = ctx->DefaultPacking;
-   }
-
-   if (state & META_PIXEL_TRANSFER) {
-      save->RedScale = ctx->Pixel.RedScale;
-      save->RedBias = ctx->Pixel.RedBias;
-      save->GreenScale = ctx->Pixel.GreenScale;
-      save->GreenBias = ctx->Pixel.GreenBias;
-      save->BlueScale = ctx->Pixel.BlueScale;
-      save->BlueBias = ctx->Pixel.BlueBias;
-      save->AlphaScale = ctx->Pixel.AlphaScale;
-      save->AlphaBias = ctx->Pixel.AlphaBias;
-      save->MapColorFlag = ctx->Pixel.MapColorFlag;
-      ctx->Pixel.RedScale = 1.0F;
-      ctx->Pixel.RedBias = 0.0F;
-      ctx->Pixel.GreenScale = 1.0F;
-      ctx->Pixel.GreenBias = 0.0F;
-      ctx->Pixel.BlueScale = 1.0F;
-      ctx->Pixel.BlueBias = 0.0F;
-      ctx->Pixel.AlphaScale = 1.0F;
-      ctx->Pixel.AlphaBias = 0.0F;
-      ctx->Pixel.MapColorFlag = GL_FALSE;
-      /* XXX more state */
-      ctx->NewState |=_NEW_PIXEL;
-   }
-
-   if (state & META_RASTERIZATION) {
-      save->FrontPolygonMode = ctx->Polygon.FrontMode;
-      save->BackPolygonMode = ctx->Polygon.BackMode;
-      save->PolygonOffset = ctx->Polygon.OffsetFill;
-      save->PolygonSmooth = ctx->Polygon.SmoothFlag;
-      save->PolygonStipple = ctx->Polygon.StippleFlag;
-      save->PolygonCull = ctx->Polygon.CullFlag;
-      _mesa_PolygonMode(GL_FRONT_AND_BACK, GL_FILL);
-      _mesa_set_enable(ctx, GL_POLYGON_OFFSET_FILL, GL_FALSE);
-      _mesa_set_enable(ctx, GL_POLYGON_SMOOTH, GL_FALSE);
-      _mesa_set_enable(ctx, GL_POLYGON_STIPPLE, GL_FALSE);
-      _mesa_set_enable(ctx, GL_CULL_FACE, GL_FALSE);
-   }
-
-   if (state & META_SCISSOR) {
-      save->Scissor = ctx->Scissor; /* struct copy */
-      _mesa_set_enable(ctx, GL_SCISSOR_TEST, GL_FALSE);
-   }
-
-   if (state & META_SHADER) {
-      if (ctx->Extensions.ARB_vertex_program) {
-         save->VertexProgramEnabled = ctx->VertexProgram.Enabled;
-         _mesa_reference_vertprog(ctx, &save->VertexProgram,
-				  ctx->VertexProgram.Current);
-         _mesa_set_enable(ctx, GL_VERTEX_PROGRAM_ARB, GL_FALSE);
-      }
-
-      if (ctx->Extensions.ARB_fragment_program) {
-         save->FragmentProgramEnabled = ctx->FragmentProgram.Enabled;
-         _mesa_reference_fragprog(ctx, &save->FragmentProgram,
-				  ctx->FragmentProgram.Current);
-         _mesa_set_enable(ctx, GL_FRAGMENT_PROGRAM_ARB, GL_FALSE);
-      }
-
-      if (ctx->Extensions.ARB_shader_objects) {
-	 _mesa_reference_shader_program(ctx, &save->VertexShader,
-					ctx->Shader.CurrentVertexProgram);
-	 _mesa_reference_shader_program(ctx, &save->GeometryShader,
-					ctx->Shader.CurrentGeometryProgram);
-	 _mesa_reference_shader_program(ctx, &save->FragmentShader,
-					ctx->Shader.CurrentFragmentProgram);
-	 _mesa_reference_shader_program(ctx, &save->ActiveShader,
-					ctx->Shader.CurrentFragmentProgram);
-
-         _mesa_UseProgramObjectARB(0);
-      }
-   }
-
-   if (state & META_STENCIL_TEST) {
-      save->Stencil = ctx->Stencil; /* struct copy */
-      if (ctx->Stencil.Enabled)
-         _mesa_set_enable(ctx, GL_STENCIL_TEST, GL_FALSE);
-      /* NOTE: other stencil state not reset */
-   }
-
-   if (state & META_TEXTURE) {
-      GLuint u, tgt;
-
-      save->ActiveUnit = ctx->Texture.CurrentUnit;
-      save->ClientActiveUnit = ctx->Array.ActiveTexture;
-      save->EnvMode = ctx->Texture.Unit[0].EnvMode;
-
-      /* Disable all texture units */
-      for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
-         save->TexEnabled[u] = ctx->Texture.Unit[u].Enabled;
-         save->TexGenEnabled[u] = ctx->Texture.Unit[u].TexGenEnabled;
-         if (ctx->Texture.Unit[u].Enabled ||
-             ctx->Texture.Unit[u].TexGenEnabled) {
-            _mesa_ActiveTextureARB(GL_TEXTURE0 + u);
-            _mesa_set_enable(ctx, GL_TEXTURE_1D, GL_FALSE);
-            _mesa_set_enable(ctx, GL_TEXTURE_2D, GL_FALSE);
-            _mesa_set_enable(ctx, GL_TEXTURE_3D, GL_FALSE);
-            if (ctx->Extensions.ARB_texture_cube_map)
-               _mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP, GL_FALSE);
-            _mesa_set_enable(ctx, GL_TEXTURE_RECTANGLE, GL_FALSE);
-            _mesa_set_enable(ctx, GL_TEXTURE_GEN_S, GL_FALSE);
-            _mesa_set_enable(ctx, GL_TEXTURE_GEN_T, GL_FALSE);
-            _mesa_set_enable(ctx, GL_TEXTURE_GEN_R, GL_FALSE);
-            _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q, GL_FALSE);
-         }
-      }
-
-      /* save current texture objects for unit[0] only */
-      for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
-         _mesa_reference_texobj(&save->CurrentTexture[tgt],
-                                ctx->Texture.Unit[0].CurrentTex[tgt]);
-      }
-
-      /* set defaults for unit[0] */
-      _mesa_ActiveTextureARB(GL_TEXTURE0);
-      _mesa_ClientActiveTextureARB(GL_TEXTURE0);
-      _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
-   }
-
-   if (state & META_TRANSFORM) {
-      GLuint activeTexture = ctx->Texture.CurrentUnit;
-      memcpy(save->ModelviewMatrix, ctx->ModelviewMatrixStack.Top->m,
-             16 * sizeof(GLfloat));
-      memcpy(save->ProjectionMatrix, ctx->ProjectionMatrixStack.Top->m,
-             16 * sizeof(GLfloat));
-      memcpy(save->TextureMatrix, ctx->TextureMatrixStack[0].Top->m,
-             16 * sizeof(GLfloat));
-      save->MatrixMode = ctx->Transform.MatrixMode;
-      /* set 1:1 vertex:pixel coordinate transform */
-      _mesa_ActiveTextureARB(GL_TEXTURE0);
-      _mesa_MatrixMode(GL_TEXTURE);
-      _mesa_LoadIdentity();
-      _mesa_ActiveTextureARB(GL_TEXTURE0 + activeTexture);
-      _mesa_MatrixMode(GL_MODELVIEW);
-      _mesa_LoadIdentity();
-      _mesa_MatrixMode(GL_PROJECTION);
-      _mesa_LoadIdentity();
-      _mesa_Ortho(0.0, ctx->DrawBuffer->Width,
-                  0.0, ctx->DrawBuffer->Height,
-                  -1.0, 1.0);
-      save->ClipPlanesEnabled = ctx->Transform.ClipPlanesEnabled;
-      if (ctx->Transform.ClipPlanesEnabled) {
-         GLuint i;
-         for (i = 0; i < ctx->Const.MaxClipPlanes; i++) {
-            _mesa_set_enable(ctx, GL_CLIP_PLANE0 + i, GL_FALSE);
-         }
-      }
-   }
-
-   if (state & META_VERTEX) {
-      /* save vertex array object state */
-      _mesa_reference_array_object(ctx, &save->ArrayObj,
-                                   ctx->Array.ArrayObj);
-      _mesa_reference_buffer_object(ctx, &save->ArrayBufferObj,
-                                    ctx->Array.ArrayBufferObj);
-      /* set some default state? */
-   }
-
-   if (state & META_VIEWPORT) {
-      /* save viewport state */
-      save->ViewportX = ctx->Viewport.X;
-      save->ViewportY = ctx->Viewport.Y;
-      save->ViewportW = ctx->Viewport.Width;
-      save->ViewportH = ctx->Viewport.Height;
-      /* set viewport to match window size */
-      if (ctx->Viewport.X != 0 ||
-          ctx->Viewport.Y != 0 ||
-          ctx->Viewport.Width != ctx->DrawBuffer->Width ||
-          ctx->Viewport.Height != ctx->DrawBuffer->Height) {
-         _mesa_set_viewport(ctx, 0, 0,
-                            ctx->DrawBuffer->Width, ctx->DrawBuffer->Height);
-      }
-      /* save depth range state */
-      save->DepthNear = ctx->Viewport.Near;
-      save->DepthFar = ctx->Viewport.Far;
-      /* set depth range to default */
-      _mesa_DepthRange(0.0, 1.0);
-   }
-
-   if (state & META_CLAMP_FRAGMENT_COLOR) {
-      save->ClampFragmentColor = ctx->Color.ClampFragmentColor;
-
-      /* Generally in here we want to do clamping according to whether
-       * it's for the pixel path (ClampFragmentColor is GL_TRUE),
-       * regardless of the internal implementation of the metaops.
-       */
-      if (ctx->Color.ClampFragmentColor != GL_TRUE)
-	 _mesa_ClampColorARB(GL_CLAMP_FRAGMENT_COLOR, GL_FALSE);
-   }
-
-   if (state & META_CLAMP_VERTEX_COLOR) {
-      save->ClampVertexColor = ctx->Light.ClampVertexColor;
-
-      /* Generally in here we never want vertex color clamping --
-       * result clamping is only dependent on fragment clamping.
-       */
-      _mesa_ClampColorARB(GL_CLAMP_VERTEX_COLOR, GL_FALSE);
-   }
-
-   if (state & META_CONDITIONAL_RENDER) {
-      save->CondRenderQuery = ctx->Query.CondRenderQuery;
-      save->CondRenderMode = ctx->Query.CondRenderMode;
-
-      if (ctx->Query.CondRenderQuery)
-	 _mesa_EndConditionalRender();
-   }
-
-   /* misc */
-   {
-      save->Lighting = ctx->Light.Enabled;
-      if (ctx->Light.Enabled)
-         _mesa_set_enable(ctx, GL_LIGHTING, GL_FALSE);
-   }
-}
-
-
-/**
- * Leave meta state.  This is like a light-weight version of glPopAttrib().
- */
-static void
-_mesa_meta_end(struct gl_context *ctx)
-{
-   struct save_state *save = &ctx->Meta->Save[--ctx->Meta->SaveStackDepth];
-   const GLbitfield state = save->SavedState;
-
-   if (state & META_ALPHA_TEST) {
-      if (ctx->Color.AlphaEnabled != save->AlphaEnabled)
-         _mesa_set_enable(ctx, GL_ALPHA_TEST, save->AlphaEnabled);
-      _mesa_AlphaFunc(save->AlphaFunc, save->AlphaRef);
-   }
-
-   if (state & META_BLEND) {
-      if (ctx->Color.BlendEnabled != save->BlendEnabled) {
-         if (ctx->Extensions.EXT_draw_buffers2) {
-            GLuint i;
-            for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
-               _mesa_set_enablei(ctx, GL_BLEND, i, (save->BlendEnabled >> i) & 1);
-            }
-         }
-         else {
-            _mesa_set_enable(ctx, GL_BLEND, (save->BlendEnabled & 1));
-         }
-      }
-      if (ctx->Color.ColorLogicOpEnabled != save->ColorLogicOpEnabled)
-         _mesa_set_enable(ctx, GL_COLOR_LOGIC_OP, save->ColorLogicOpEnabled);
-   }
-
-   if (state & META_COLOR_MASK) {
-      GLuint i;
-      for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
-         if (!TEST_EQ_4V(ctx->Color.ColorMask[i], save->ColorMask[i])) {
-            if (i == 0) {
-               _mesa_ColorMask(save->ColorMask[i][0], save->ColorMask[i][1],
-                               save->ColorMask[i][2], save->ColorMask[i][3]);
-            }
-            else {
-               _mesa_ColorMaskIndexed(i,
-                                      save->ColorMask[i][0],
-                                      save->ColorMask[i][1],
-                                      save->ColorMask[i][2],
-                                      save->ColorMask[i][3]);
-            }
-         }
-      }
-   }
-
-   if (state & META_DEPTH_TEST) {
-      if (ctx->Depth.Test != save->Depth.Test)
-         _mesa_set_enable(ctx, GL_DEPTH_TEST, save->Depth.Test);
-      _mesa_DepthFunc(save->Depth.Func);
-      _mesa_DepthMask(save->Depth.Mask);
-   }
-
-   if (state & META_FOG) {
-      _mesa_set_enable(ctx, GL_FOG, save->Fog);
-   }
-
-   if (state & META_PIXEL_STORE) {
-      ctx->Pack = save->Pack;
-      ctx->Unpack = save->Unpack;
-   }
-
-   if (state & META_PIXEL_TRANSFER) {
-      ctx->Pixel.RedScale = save->RedScale;
-      ctx->Pixel.RedBias = save->RedBias;
-      ctx->Pixel.GreenScale = save->GreenScale;
-      ctx->Pixel.GreenBias = save->GreenBias;
-      ctx->Pixel.BlueScale = save->BlueScale;
-      ctx->Pixel.BlueBias = save->BlueBias;
-      ctx->Pixel.AlphaScale = save->AlphaScale;
-      ctx->Pixel.AlphaBias = save->AlphaBias;
-      ctx->Pixel.MapColorFlag = save->MapColorFlag;
-      /* XXX more state */
-      ctx->NewState |=_NEW_PIXEL;
-   }
-
-   if (state & META_RASTERIZATION) {
-      _mesa_PolygonMode(GL_FRONT, save->FrontPolygonMode);
-      _mesa_PolygonMode(GL_BACK, save->BackPolygonMode);
-      _mesa_set_enable(ctx, GL_POLYGON_STIPPLE, save->PolygonStipple);
-      _mesa_set_enable(ctx, GL_POLYGON_OFFSET_FILL, save->PolygonOffset);
-      _mesa_set_enable(ctx, GL_POLYGON_SMOOTH, save->PolygonSmooth);
-      _mesa_set_enable(ctx, GL_CULL_FACE, save->PolygonCull);
-   }
-
-   if (state & META_SCISSOR) {
-      _mesa_set_enable(ctx, GL_SCISSOR_TEST, save->Scissor.Enabled);
-      _mesa_Scissor(save->Scissor.X, save->Scissor.Y,
-                    save->Scissor.Width, save->Scissor.Height);
-   }
-
-   if (state & META_SHADER) {
-      if (ctx->Extensions.ARB_vertex_program) {
-         _mesa_set_enable(ctx, GL_VERTEX_PROGRAM_ARB,
-                          save->VertexProgramEnabled);
-         _mesa_reference_vertprog(ctx, &ctx->VertexProgram.Current, 
-                                  save->VertexProgram);
-	 _mesa_reference_vertprog(ctx, &save->VertexProgram, NULL);
-      }
-
-      if (ctx->Extensions.ARB_fragment_program) {
-         _mesa_set_enable(ctx, GL_FRAGMENT_PROGRAM_ARB,
-                          save->FragmentProgramEnabled);
-         _mesa_reference_fragprog(ctx, &ctx->FragmentProgram.Current,
-                                  save->FragmentProgram);
-	 _mesa_reference_fragprog(ctx, &save->FragmentProgram, NULL);
-      }
-
-      if (ctx->Extensions.ARB_vertex_shader)
-	 _mesa_use_shader_program(ctx, GL_VERTEX_SHADER, save->VertexShader);
-
-      if (ctx->Extensions.ARB_geometry_shader4)
-	 _mesa_use_shader_program(ctx, GL_GEOMETRY_SHADER_ARB,
-				  save->GeometryShader);
-
-      if (ctx->Extensions.ARB_fragment_shader)
-	 _mesa_use_shader_program(ctx, GL_FRAGMENT_SHADER,
-				  save->FragmentShader);
-
-      _mesa_reference_shader_program(ctx, &ctx->Shader.ActiveProgram,
-				     save->ActiveShader);
-   }
-
-   if (state & META_STENCIL_TEST) {
-      const struct gl_stencil_attrib *stencil = &save->Stencil;
-
-      _mesa_set_enable(ctx, GL_STENCIL_TEST, stencil->Enabled);
-      _mesa_ClearStencil(stencil->Clear);
-      if (ctx->Extensions.EXT_stencil_two_side) {
-         _mesa_set_enable(ctx, GL_STENCIL_TEST_TWO_SIDE_EXT,
-                          stencil->TestTwoSide);
-         _mesa_ActiveStencilFaceEXT(stencil->ActiveFace
-                                    ? GL_BACK : GL_FRONT);
-      }
-      /* front state */
-      _mesa_StencilFuncSeparate(GL_FRONT,
-                                stencil->Function[0],
-                                stencil->Ref[0],
-                                stencil->ValueMask[0]);
-      _mesa_StencilMaskSeparate(GL_FRONT, stencil->WriteMask[0]);
-      _mesa_StencilOpSeparate(GL_FRONT, stencil->FailFunc[0],
-                              stencil->ZFailFunc[0],
-                              stencil->ZPassFunc[0]);
-      /* back state */
-      _mesa_StencilFuncSeparate(GL_BACK,
-                                stencil->Function[1],
-                                stencil->Ref[1],
-                                stencil->ValueMask[1]);
-      _mesa_StencilMaskSeparate(GL_BACK, stencil->WriteMask[1]);
-      _mesa_StencilOpSeparate(GL_BACK, stencil->FailFunc[1],
-                              stencil->ZFailFunc[1],
-                              stencil->ZPassFunc[1]);
-   }
-
-   if (state & META_TEXTURE) {
-      GLuint u, tgt;
-
-      ASSERT(ctx->Texture.CurrentUnit == 0);
-
-      /* restore texenv for unit[0] */
-      _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, save->EnvMode);
-
-      /* restore texture objects for unit[0] only */
-      for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
-         _mesa_reference_texobj(&ctx->Texture.Unit[0].CurrentTex[tgt],
-                                save->CurrentTexture[tgt]);
-         _mesa_reference_texobj(&save->CurrentTexture[tgt], NULL);
-      }
-
-      /* Re-enable textures, texgen */
-      for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
-         if (save->TexEnabled[u]) {
-            _mesa_ActiveTextureARB(GL_TEXTURE0 + u);
-
-            if (save->TexEnabled[u] & TEXTURE_1D_BIT)
-               _mesa_set_enable(ctx, GL_TEXTURE_1D, GL_TRUE);
-            if (save->TexEnabled[u] & TEXTURE_2D_BIT)
-               _mesa_set_enable(ctx, GL_TEXTURE_2D, GL_TRUE);
-            if (save->TexEnabled[u] & TEXTURE_3D_BIT)
-               _mesa_set_enable(ctx, GL_TEXTURE_3D, GL_TRUE);
-            if (save->TexEnabled[u] & TEXTURE_CUBE_BIT)
-               _mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP, GL_TRUE);
-            if (save->TexEnabled[u] & TEXTURE_RECT_BIT)
-               _mesa_set_enable(ctx, GL_TEXTURE_RECTANGLE, GL_TRUE);
-         }
-
-         if (save->TexGenEnabled[u]) {
-            _mesa_ActiveTextureARB(GL_TEXTURE0 + u);
-
-            if (save->TexGenEnabled[u] & S_BIT)
-               _mesa_set_enable(ctx, GL_TEXTURE_GEN_S, GL_TRUE);
-            if (save->TexGenEnabled[u] & T_BIT)
-               _mesa_set_enable(ctx, GL_TEXTURE_GEN_T, GL_TRUE);
-            if (save->TexGenEnabled[u] & R_BIT)
-               _mesa_set_enable(ctx, GL_TEXTURE_GEN_R, GL_TRUE);
-            if (save->TexGenEnabled[u] & Q_BIT)
-               _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q, GL_TRUE);
-         }
-      }
-
-      /* restore current unit state */
-      _mesa_ActiveTextureARB(GL_TEXTURE0 + save->ActiveUnit);
-      _mesa_ClientActiveTextureARB(GL_TEXTURE0 + save->ClientActiveUnit);
-   }
-
-   if (state & META_TRANSFORM) {
-      GLuint activeTexture = ctx->Texture.CurrentUnit;
-      _mesa_ActiveTextureARB(GL_TEXTURE0);
-      _mesa_MatrixMode(GL_TEXTURE);
-      _mesa_LoadMatrixf(save->TextureMatrix);
-      _mesa_ActiveTextureARB(GL_TEXTURE0 + activeTexture);
-
-      _mesa_MatrixMode(GL_MODELVIEW);
-      _mesa_LoadMatrixf(save->ModelviewMatrix);
-
-      _mesa_MatrixMode(GL_PROJECTION);
-      _mesa_LoadMatrixf(save->ProjectionMatrix);
-
-      _mesa_MatrixMode(save->MatrixMode);
-
-      if (save->ClipPlanesEnabled) {
-         GLuint i;
-         for (i = 0; i < ctx->Const.MaxClipPlanes; i++) {
-            if (save->ClipPlanesEnabled & (1 << i)) {
-               _mesa_set_enable(ctx, GL_CLIP_PLANE0 + i, GL_TRUE);
-            }
-         }
-      }
-   }
-
-   if (state & META_VERTEX) {
-      /* restore vertex buffer object */
-      _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, save->ArrayBufferObj->Name);
-      _mesa_reference_buffer_object(ctx, &save->ArrayBufferObj, NULL);
-
-      /* restore vertex array object */
-      _mesa_BindVertexArray(save->ArrayObj->Name);
-      _mesa_reference_array_object(ctx, &save->ArrayObj, NULL);
-   }
-
-   if (state & META_VIEWPORT) {
-      if (save->ViewportX != ctx->Viewport.X ||
-          save->ViewportY != ctx->Viewport.Y ||
-          save->ViewportW != ctx->Viewport.Width ||
-          save->ViewportH != ctx->Viewport.Height) {
-         _mesa_set_viewport(ctx, save->ViewportX, save->ViewportY,
-                            save->ViewportW, save->ViewportH);
-      }
-      _mesa_DepthRange(save->DepthNear, save->DepthFar);
-   }
-
-   if (state & META_CLAMP_FRAGMENT_COLOR) {
-      _mesa_ClampColorARB(GL_CLAMP_FRAGMENT_COLOR, save->ClampFragmentColor);
-   }
-
-   if (state & META_CLAMP_VERTEX_COLOR) {
-      _mesa_ClampColorARB(GL_CLAMP_VERTEX_COLOR, save->ClampVertexColor);
-   }
-
-   if (state & META_CONDITIONAL_RENDER) {
-      if (save->CondRenderQuery)
-	 _mesa_BeginConditionalRender(save->CondRenderQuery->Id,
-				      save->CondRenderMode);
-   }
-
-   /* misc */
-   if (save->Lighting) {
-      _mesa_set_enable(ctx, GL_LIGHTING, GL_TRUE);
-   }
-}
-
-
-/**
- * Convert Z from a normalized value in the range [0, 1] to an object-space
- * Z coordinate in [-1, +1] so that drawing at the new Z position with the
- * default/identity ortho projection results in the original Z value.
- * Used by the meta-Clear, Draw/CopyPixels and Bitmap functions where the Z
- * value comes from the clear value or raster position.
- */
-static INLINE GLfloat
-invert_z(GLfloat normZ)
-{
-   GLfloat objZ = 1.0 - 2.0 * normZ;
-   return objZ;
-}
-
-
-/**
- * One-time init for a temp_texture object.
- * Choose tex target, compute max tex size, etc.
- */
-static void
-init_temp_texture(struct gl_context *ctx, struct temp_texture *tex)
-{
-   /* prefer texture rectangle */
-   if (ctx->Extensions.NV_texture_rectangle) {
-      tex->Target = GL_TEXTURE_RECTANGLE;
-      tex->MaxSize = ctx->Const.MaxTextureRectSize;
-      tex->NPOT = GL_TRUE;
-   }
-   else {
-      /* use 2D texture, NPOT if possible */
-      tex->Target = GL_TEXTURE_2D;
-      tex->MaxSize = 1 << (ctx->Const.MaxTextureLevels - 1);
-      tex->NPOT = ctx->Extensions.ARB_texture_non_power_of_two;
-   }
-   tex->MinSize = 16;  /* 16 x 16 at least */
-   assert(tex->MaxSize > 0);
-
-   _mesa_GenTextures(1, &tex->TexObj);
-}
-
-
-/**
- * Return pointer to temp_texture info for non-bitmap ops.
- * This does some one-time init if needed.
- */
-static struct temp_texture *
-get_temp_texture(struct gl_context *ctx)
-{
-   struct temp_texture *tex = &ctx->Meta->TempTex;
-
-   if (!tex->TexObj) {
-      init_temp_texture(ctx, tex);
-   }
-
-   return tex;
-}
-
-
-/**
- * Return pointer to temp_texture info for _mesa_meta_bitmap().
- * We use a separate texture for bitmaps to reduce texture
- * allocation/deallocation.
- */
-static struct temp_texture *
-get_bitmap_temp_texture(struct gl_context *ctx)
-{
-   struct temp_texture *tex = &ctx->Meta->Bitmap.Tex;
-
-   if (!tex->TexObj) {
-      init_temp_texture(ctx, tex);
-   }
-
-   return tex;
-}
-
-
-/**
- * Compute the width/height of texture needed to draw an image of the
- * given size.  Return a flag indicating whether the current texture
- * can be re-used (glTexSubImage2D) or if a new texture needs to be
- * allocated (glTexImage2D).
- * Also, compute s/t texcoords for drawing.
- *
- * \return GL_TRUE if new texture is needed, GL_FALSE otherwise
- */
-static GLboolean
-alloc_texture(struct temp_texture *tex,
-              GLsizei width, GLsizei height, GLenum intFormat)
-{
-   GLboolean newTex = GL_FALSE;
-
-   ASSERT(width <= tex->MaxSize);
-   ASSERT(height <= tex->MaxSize);
-
-   if (width > tex->Width ||
-       height > tex->Height ||
-       intFormat != tex->IntFormat) {
-      /* alloc new texture (larger or different format) */
-
-      if (tex->NPOT) {
-         /* use non-power of two size */
-         tex->Width = MAX2(tex->MinSize, width);
-         tex->Height = MAX2(tex->MinSize, height);
-      }
-      else {
-         /* find power of two size */
-         GLsizei w, h;
-         w = h = tex->MinSize;
-         while (w < width)
-            w *= 2;
-         while (h < height)
-            h *= 2;
-         tex->Width = w;
-         tex->Height = h;
-      }
-
-      tex->IntFormat = intFormat;
-
-      newTex = GL_TRUE;
-   }
-
-   /* compute texcoords */
-   if (tex->Target == GL_TEXTURE_RECTANGLE) {
-      tex->Sright = (GLfloat) width;
-      tex->Ttop = (GLfloat) height;
-   }
-   else {
-      tex->Sright = (GLfloat) width / tex->Width;
-      tex->Ttop = (GLfloat) height / tex->Height;
-   }
-
-   return newTex;
-}
-
-
-/**
- * Setup/load texture for glCopyPixels or glBlitFramebuffer.
- */
-static void
-setup_copypix_texture(struct temp_texture *tex,
-                      GLboolean newTex,
-                      GLint srcX, GLint srcY,
-                      GLsizei width, GLsizei height, GLenum intFormat,
-                      GLenum filter)
-{
-   _mesa_BindTexture(tex->Target, tex->TexObj);
-   _mesa_TexParameteri(tex->Target, GL_TEXTURE_MIN_FILTER, filter);
-   _mesa_TexParameteri(tex->Target, GL_TEXTURE_MAG_FILTER, filter);
-   _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
-
-   /* copy framebuffer image to texture */
-   if (newTex) {
-      /* create new tex image */
-      if (tex->Width == width && tex->Height == height) {
-         /* create new tex with framebuffer data */
-         _mesa_CopyTexImage2D(tex->Target, 0, tex->IntFormat,
-                              srcX, srcY, width, height, 0);
-      }
-      else {
-         /* create empty texture */
-         _mesa_TexImage2D(tex->Target, 0, tex->IntFormat,
-                          tex->Width, tex->Height, 0,
-                          intFormat, GL_UNSIGNED_BYTE, NULL);
-         /* load image */
-         _mesa_CopyTexSubImage2D(tex->Target, 0,
-                                 0, 0, srcX, srcY, width, height);
-      }
-   }
-   else {
-      /* replace existing tex image */
-      _mesa_CopyTexSubImage2D(tex->Target, 0,
-                              0, 0, srcX, srcY, width, height);
-   }
-}
-
-
-/**
- * Setup/load texture for glDrawPixels.
- */
-static void
-setup_drawpix_texture(struct gl_context *ctx,
-		      struct temp_texture *tex,
-                      GLboolean newTex,
-                      GLenum texIntFormat,
-                      GLsizei width, GLsizei height,
-                      GLenum format, GLenum type,
-                      const GLvoid *pixels)
-{
-   _mesa_BindTexture(tex->Target, tex->TexObj);
-   _mesa_TexParameteri(tex->Target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
-   _mesa_TexParameteri(tex->Target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
-   _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
-
-   /* copy pixel data to texture */
-   if (newTex) {
-      /* create new tex image */
-      if (tex->Width == width && tex->Height == height) {
-         /* create new tex and load image data */
-         _mesa_TexImage2D(tex->Target, 0, tex->IntFormat,
-                          tex->Width, tex->Height, 0, format, type, pixels);
-      }
-      else {
-	 struct gl_buffer_object *save_unpack_obj = NULL;
-
-	 _mesa_reference_buffer_object(ctx, &save_unpack_obj,
-				       ctx->Unpack.BufferObj);
-	 _mesa_BindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, 0);
-         /* create empty texture */
-         _mesa_TexImage2D(tex->Target, 0, tex->IntFormat,
-                          tex->Width, tex->Height, 0, format, type, NULL);
-	 if (save_unpack_obj != NULL)
-	    _mesa_BindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB,
-				save_unpack_obj->Name);
-         /* load image */
-         _mesa_TexSubImage2D(tex->Target, 0,
-                             0, 0, width, height, format, type, pixels);
-      }
-   }
-   else {
-      /* replace existing tex image */
-      _mesa_TexSubImage2D(tex->Target, 0,
-                          0, 0, width, height, format, type, pixels);
-   }
-}
-
-
-
-/**
- * One-time init for drawing depth pixels.
- */
-static void
-init_blit_depth_pixels(struct gl_context *ctx)
-{
-   static const char *program =
-      "!!ARBfp1.0\n"
-      "TEX result.depth, fragment.texcoord[0], texture[0], %s; \n"
-      "END \n";
-   char program2[200];
-   struct blit_state *blit = &ctx->Meta->Blit;
-   struct temp_texture *tex = get_temp_texture(ctx);
-   const char *texTarget;
-
-   assert(blit->DepthFP == 0);
-
-   /* replace %s with "RECT" or "2D" */
-   assert(strlen(program) + 4 < sizeof(program2));
-   if (tex->Target == GL_TEXTURE_RECTANGLE)
-      texTarget = "RECT";
-   else
-      texTarget = "2D";
-   _mesa_snprintf(program2, sizeof(program2), program, texTarget);
-
-   _mesa_GenPrograms(1, &blit->DepthFP);
-   _mesa_BindProgram(GL_FRAGMENT_PROGRAM_ARB, blit->DepthFP);
-   _mesa_ProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
-                          strlen(program2), (const GLubyte *) program2);
-}
-
-
-/**
- * Try to do a glBlitFramebuffer using no-copy texturing.
- * We can do this when the src renderbuffer is actually a texture.
- * But if the src buffer == dst buffer we cannot do this.
- *
- * \return new buffer mask indicating the buffers left to blit using the
- *         normal path.
- */
-static GLbitfield
-blitframebuffer_texture(struct gl_context *ctx,
-                        GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
-                        GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
-                        GLbitfield mask, GLenum filter)
-{
-   if (mask & GL_COLOR_BUFFER_BIT) {
-      const struct gl_framebuffer *drawFb = ctx->DrawBuffer;
-      const struct gl_framebuffer *readFb = ctx->ReadBuffer;
-      const struct gl_renderbuffer_attachment *drawAtt =
-         &drawFb->Attachment[drawFb->_ColorDrawBufferIndexes[0]];
-      const struct gl_renderbuffer_attachment *readAtt =
-         &readFb->Attachment[readFb->_ColorReadBufferIndex];
-
-      if (readAtt && readAtt->Texture) {
-         const struct gl_texture_object *texObj = readAtt->Texture;
-         const GLuint srcLevel = readAtt->TextureLevel;
-         const GLenum minFilterSave = texObj->Sampler.MinFilter;
-         const GLenum magFilterSave = texObj->Sampler.MagFilter;
-         const GLint baseLevelSave = texObj->BaseLevel;
-         const GLint maxLevelSave = texObj->MaxLevel;
-         const GLenum wrapSSave = texObj->Sampler.WrapS;
-         const GLenum wrapTSave = texObj->Sampler.WrapT;
-         const GLenum target = texObj->Target;
-
-         if (drawAtt->Texture == readAtt->Texture) {
-            /* Can't use same texture as both the source and dest.  We need
-             * to handle overlapping blits and besides, some hw may not
-             * support this.
-             */
-            return mask;
-         }
-
-         if (target != GL_TEXTURE_2D && target != GL_TEXTURE_RECTANGLE_ARB) {
-            /* Can't handle other texture types at this time */
-            return mask;
-         }
-
-         /*
-         printf("Blit from texture!\n");
-         printf("  srcAtt %p  dstAtt %p\n", readAtt, drawAtt);
-         printf("  srcTex %p  dstText %p\n", texObj, drawAtt->Texture);
-         */
-
-         /* Prepare src texture state */
-         _mesa_BindTexture(target, texObj->Name);
-         _mesa_TexParameteri(target, GL_TEXTURE_MIN_FILTER, filter);
-         _mesa_TexParameteri(target, GL_TEXTURE_MAG_FILTER, filter);
-         if (target != GL_TEXTURE_RECTANGLE_ARB) {
-            _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, srcLevel);
-            _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, srcLevel);
-         }
-         _mesa_TexParameteri(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
-         _mesa_TexParameteri(target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
-         _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
-         _mesa_set_enable(ctx, target, GL_TRUE);
-
-         /* Prepare vertex data (the VBO was previously created and bound) */
-         {
-            struct vertex {
-               GLfloat x, y, s, t;
-            };
-            struct vertex verts[4];
-            GLfloat s0, t0, s1, t1;
-
-            if (target == GL_TEXTURE_2D) {
-               const struct gl_texture_image *texImage
-                   = _mesa_select_tex_image(ctx, texObj, target, srcLevel);
-               s0 = srcX0 / (float) texImage->Width;
-               s1 = srcX1 / (float) texImage->Width;
-               t0 = srcY0 / (float) texImage->Height;
-               t1 = srcY1 / (float) texImage->Height;
-            }
-            else {
-               assert(target == GL_TEXTURE_RECTANGLE_ARB);
-               s0 = srcX0;
-               s1 = srcX1;
-               t0 = srcY0;
-               t1 = srcY1;
-            }
-
-            verts[0].x = (GLfloat) dstX0;
-            verts[0].y = (GLfloat) dstY0;
-            verts[1].x = (GLfloat) dstX1;
-            verts[1].y = (GLfloat) dstY0;
-            verts[2].x = (GLfloat) dstX1;
-            verts[2].y = (GLfloat) dstY1;
-            verts[3].x = (GLfloat) dstX0;
-            verts[3].y = (GLfloat) dstY1;
-
-            verts[0].s = s0;
-            verts[0].t = t0;
-            verts[1].s = s1;
-            verts[1].t = t0;
-            verts[2].s = s1;
-            verts[2].t = t1;
-            verts[3].s = s0;
-            verts[3].t = t1;
-
-            _mesa_BufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);
-         }
-
-         _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
-
-         /* Restore texture object state, the texture binding will
-          * be restored by _mesa_meta_end().
-          */
-         _mesa_TexParameteri(target, GL_TEXTURE_MIN_FILTER, minFilterSave);
-         _mesa_TexParameteri(target, GL_TEXTURE_MAG_FILTER, magFilterSave);
-         if (target != GL_TEXTURE_RECTANGLE_ARB) {
-            _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, baseLevelSave);
-            _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, maxLevelSave);
-         }
-         _mesa_TexParameteri(target, GL_TEXTURE_WRAP_S, wrapSSave);
-         _mesa_TexParameteri(target, GL_TEXTURE_WRAP_T, wrapTSave);
-
-         /* Done with color buffer */
-         mask &= ~GL_COLOR_BUFFER_BIT;
-      }
-   }
-
-   return mask;
-}
-
-
-/**
- * Meta implementation of ctx->Driver.BlitFramebuffer() in terms
- * of texture mapping and polygon rendering.
- */
-void
-_mesa_meta_BlitFramebuffer(struct gl_context *ctx,
-                           GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
-                           GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
-                           GLbitfield mask, GLenum filter)
-{
-   struct blit_state *blit = &ctx->Meta->Blit;
-   struct temp_texture *tex = get_temp_texture(ctx);
-   const GLsizei maxTexSize = tex->MaxSize;
-   const GLint srcX = MIN2(srcX0, srcX1);
-   const GLint srcY = MIN2(srcY0, srcY1);
-   const GLint srcW = abs(srcX1 - srcX0);
-   const GLint srcH = abs(srcY1 - srcY0);
-   const GLboolean srcFlipX = srcX1 < srcX0;
-   const GLboolean srcFlipY = srcY1 < srcY0;
-   struct vertex {
-      GLfloat x, y, s, t;
-   };
-   struct vertex verts[4];
-   GLboolean newTex;
-
-   if (srcW > maxTexSize || srcH > maxTexSize) {
-      /* XXX avoid this fallback */
-      _swrast_BlitFramebuffer(ctx, srcX0, srcY0, srcX1, srcY1,
-                              dstX0, dstY0, dstX1, dstY1, mask, filter);
-      return;
-   }
-
-   if (srcFlipX) {
-      GLint tmp = dstX0;
-      dstX0 = dstX1;
-      dstX1 = tmp;
-   }
-
-   if (srcFlipY) {
-      GLint tmp = dstY0;
-      dstY0 = dstY1;
-      dstY1 = tmp;
-   }
-
-   /* only scissor effects blit so save/clear all other relevant state */
-   _mesa_meta_begin(ctx, ~META_SCISSOR);
-
-   if (blit->ArrayObj == 0) {
-      /* one-time setup */
-
-      /* create vertex array object */
-      _mesa_GenVertexArrays(1, &blit->ArrayObj);
-      _mesa_BindVertexArray(blit->ArrayObj);
-
-      /* create vertex array buffer */
-      _mesa_GenBuffersARB(1, &blit->VBO);
-      _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, blit->VBO);
-      _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts),
-                          NULL, GL_DYNAMIC_DRAW_ARB);
-
-      /* setup vertex arrays */
-      _mesa_VertexPointer(2, GL_FLOAT, sizeof(struct vertex), OFFSET(x));
-      _mesa_TexCoordPointer(2, GL_FLOAT, sizeof(struct vertex), OFFSET(s));
-      _mesa_EnableClientState(GL_VERTEX_ARRAY);
-      _mesa_EnableClientState(GL_TEXTURE_COORD_ARRAY);
-   }
-   else {
-      _mesa_BindVertexArray(blit->ArrayObj);
-      _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, blit->VBO);
-   }
-
-   /* Try faster, direct texture approach first */
-   mask = blitframebuffer_texture(ctx, srcX0, srcY0, srcX1, srcY1,
-                                  dstX0, dstY0, dstX1, dstY1, mask, filter);
-   if (mask == 0x0) {
-      _mesa_meta_end(ctx);
-      return;
-   }
-
-   /* Continue with "normal" approach which involves copying the src rect
-    * into a temporary texture and is "blitted" by drawing a textured quad.
-    */
-
-   newTex = alloc_texture(tex, srcW, srcH, GL_RGBA);
-
-   /* vertex positions/texcoords (after texture allocation!) */
-   {
-      verts[0].x = (GLfloat) dstX0;
-      verts[0].y = (GLfloat) dstY0;
-      verts[1].x = (GLfloat) dstX1;
-      verts[1].y = (GLfloat) dstY0;
-      verts[2].x = (GLfloat) dstX1;
-      verts[2].y = (GLfloat) dstY1;
-      verts[3].x = (GLfloat) dstX0;
-      verts[3].y = (GLfloat) dstY1;
-
-      verts[0].s = 0.0F;
-      verts[0].t = 0.0F;
-      verts[1].s = tex->Sright;
-      verts[1].t = 0.0F;
-      verts[2].s = tex->Sright;
-      verts[2].t = tex->Ttop;
-      verts[3].s = 0.0F;
-      verts[3].t = tex->Ttop;
-
-      /* upload new vertex data */
-      _mesa_BufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);
-   }
-
-   _mesa_set_enable(ctx, tex->Target, GL_TRUE);
-
-   if (mask & GL_COLOR_BUFFER_BIT) {
-      setup_copypix_texture(tex, newTex, srcX, srcY, srcW, srcH,
-                            GL_RGBA, filter);
-      _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
-      mask &= ~GL_COLOR_BUFFER_BIT;
-   }
-
-   if (mask & GL_DEPTH_BUFFER_BIT) {
-      GLuint *tmp = (GLuint *) malloc(srcW * srcH * sizeof(GLuint));
-      if (tmp) {
-         if (!blit->DepthFP)
-            init_blit_depth_pixels(ctx);
-
-         /* maybe change tex format here */
-         newTex = alloc_texture(tex, srcW, srcH, GL_DEPTH_COMPONENT);
-
-         _mesa_ReadPixels(srcX, srcY, srcW, srcH,
-                          GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, tmp);
-
-         setup_drawpix_texture(ctx, tex, newTex, GL_DEPTH_COMPONENT, srcW, srcH,
-                               GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, tmp);
-
-         _mesa_BindProgram(GL_FRAGMENT_PROGRAM_ARB, blit->DepthFP);
-         _mesa_set_enable(ctx, GL_FRAGMENT_PROGRAM_ARB, GL_TRUE);
-         _mesa_ColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
-         _mesa_set_enable(ctx, GL_DEPTH_TEST, GL_TRUE);
-         _mesa_DepthFunc(GL_ALWAYS);
-         _mesa_DepthMask(GL_TRUE);
-
-         _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
-         mask &= ~GL_DEPTH_BUFFER_BIT;
-
-         free(tmp);
-      }
-   }
-
-   if (mask & GL_STENCIL_BUFFER_BIT) {
-      /* XXX can't easily do stencil */
-   }
-
-   _mesa_set_enable(ctx, tex->Target, GL_FALSE);
-
-   _mesa_meta_end(ctx);
-
-   if (mask) {
-      _swrast_BlitFramebuffer(ctx, srcX0, srcY0, srcX1, srcY1,
-                              dstX0, dstY0, dstX1, dstY1, mask, filter);
-   }
-}
-
-
-/**
- * Meta implementation of ctx->Driver.Clear() in terms of polygon rendering.
- */
-void
-_mesa_meta_Clear(struct gl_context *ctx, GLbitfield buffers)
-{
-   struct clear_state *clear = &ctx->Meta->Clear;
-   struct vertex {
-      GLfloat x, y, z, r, g, b, a;
-   };
-   struct vertex verts[4];
-   /* save all state but scissor, pixel pack/unpack */
-   GLbitfield metaSave = (META_ALL -
-			  META_SCISSOR -
-			  META_PIXEL_STORE -
-			  META_CONDITIONAL_RENDER);
-   const GLuint stencilMax = (1 << ctx->DrawBuffer->Visual.stencilBits) - 1;
-
-   if (buffers & BUFFER_BITS_COLOR) {
-      /* if clearing color buffers, don't save/restore colormask */
-      metaSave -= META_COLOR_MASK;
-   }
-
-   _mesa_meta_begin(ctx, metaSave);
-
-   if (clear->ArrayObj == 0) {
-      /* one-time setup */
-
-      /* create vertex array object */
-      _mesa_GenVertexArrays(1, &clear->ArrayObj);
-      _mesa_BindVertexArray(clear->ArrayObj);
-
-      /* create vertex array buffer */
-      _mesa_GenBuffersARB(1, &clear->VBO);
-      _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, clear->VBO);
-
-      /* setup vertex arrays */
-      _mesa_VertexPointer(3, GL_FLOAT, sizeof(struct vertex), OFFSET(x));
-      _mesa_ColorPointer(4, GL_FLOAT, sizeof(struct vertex), OFFSET(r));
-      _mesa_EnableClientState(GL_VERTEX_ARRAY);
-      _mesa_EnableClientState(GL_COLOR_ARRAY);
-   }
-   else {
-      _mesa_BindVertexArray(clear->ArrayObj);
-      _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, clear->VBO);
-   }
-
-   /* GL_COLOR_BUFFER_BIT */
-   if (buffers & BUFFER_BITS_COLOR) {
-      /* leave colormask, glDrawBuffer state as-is */
-
-      /* Clears never have the color clamped. */
-      _mesa_ClampColorARB(GL_CLAMP_FRAGMENT_COLOR, GL_FALSE);
-   }
-   else {
-      ASSERT(metaSave & META_COLOR_MASK);
-      _mesa_ColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
-   }
-
-   /* GL_DEPTH_BUFFER_BIT */
-   if (buffers & BUFFER_BIT_DEPTH) {
-      _mesa_set_enable(ctx, GL_DEPTH_TEST, GL_TRUE);
-      _mesa_DepthFunc(GL_ALWAYS);
-      _mesa_DepthMask(GL_TRUE);
-   }
-   else {
-      assert(!ctx->Depth.Test);
-   }
-
-   /* GL_STENCIL_BUFFER_BIT */
-   if (buffers & BUFFER_BIT_STENCIL) {
-      _mesa_set_enable(ctx, GL_STENCIL_TEST, GL_TRUE);
-      _mesa_StencilOpSeparate(GL_FRONT_AND_BACK,
-                              GL_REPLACE, GL_REPLACE, GL_REPLACE);
-      _mesa_StencilFuncSeparate(GL_FRONT_AND_BACK, GL_ALWAYS,
-                                ctx->Stencil.Clear & stencilMax,
-                                ctx->Stencil.WriteMask[0]);
-   }
-   else {
-      assert(!ctx->Stencil.Enabled);
-   }
-
-   /* vertex positions/colors */
-   {
-      const GLfloat x0 = (GLfloat) ctx->DrawBuffer->_Xmin;
-      const GLfloat y0 = (GLfloat) ctx->DrawBuffer->_Ymin;
-      const GLfloat x1 = (GLfloat) ctx->DrawBuffer->_Xmax;
-      const GLfloat y1 = (GLfloat) ctx->DrawBuffer->_Ymax;
-      const GLfloat z = invert_z(ctx->Depth.Clear);
-      GLuint i;
-
-      verts[0].x = x0;
-      verts[0].y = y0;
-      verts[0].z = z;
-      verts[1].x = x1;
-      verts[1].y = y0;
-      verts[1].z = z;
-      verts[2].x = x1;
-      verts[2].y = y1;
-      verts[2].z = z;
-      verts[3].x = x0;
-      verts[3].y = y1;
-      verts[3].z = z;
-
-      /* vertex colors */
-      for (i = 0; i < 4; i++) {
-         verts[i].r = ctx->Color.ClearColorUnclamped[0];
-         verts[i].g = ctx->Color.ClearColorUnclamped[1];
-         verts[i].b = ctx->Color.ClearColorUnclamped[2];
-         verts[i].a = ctx->Color.ClearColorUnclamped[3];
-      }
-
-      /* upload new vertex data */
-      _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts), verts,
-			  GL_DYNAMIC_DRAW_ARB);
-   }
-
-   /* draw quad */
-   _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
-
-   _mesa_meta_end(ctx);
-}
-
-
-/**
- * Meta implementation of ctx->Driver.CopyPixels() in terms
- * of texture mapping and polygon rendering.
- */
-void
-_mesa_meta_CopyPixels(struct gl_context *ctx, GLint srcX, GLint srcY,
-                      GLsizei width, GLsizei height,
-                      GLint dstX, GLint dstY, GLenum type)
-{
-   struct copypix_state *copypix = &ctx->Meta->CopyPix;
-   struct temp_texture *tex = get_temp_texture(ctx);
-   struct vertex {
-      GLfloat x, y, z, s, t;
-   };
-   struct vertex verts[4];
-   GLboolean newTex;
-   GLenum intFormat = GL_RGBA;
-
-   if (type != GL_COLOR ||
-       ctx->_ImageTransferState ||
-       ctx->Fog.Enabled ||
-       width > tex->MaxSize ||
-       height > tex->MaxSize) {
-      /* XXX avoid this fallback */
-      _swrast_CopyPixels(ctx, srcX, srcY, width, height, dstX, dstY, type);
-      return;
-   }
-
-   /* Most GL state applies to glCopyPixels, but a there's a few things
-    * we need to override:
-    */
-   _mesa_meta_begin(ctx, (META_RASTERIZATION |
-                          META_SHADER |
-                          META_TEXTURE |
-                          META_TRANSFORM |
-                          META_VERTEX |
-                          META_VIEWPORT));
-
-   if (copypix->ArrayObj == 0) {
-      /* one-time setup */
-
-      /* create vertex array object */
-      _mesa_GenVertexArrays(1, &copypix->ArrayObj);
-      _mesa_BindVertexArray(copypix->ArrayObj);
-
-      /* create vertex array buffer */
-      _mesa_GenBuffersARB(1, &copypix->VBO);
-      _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, copypix->VBO);
-      _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts),
-                          NULL, GL_DYNAMIC_DRAW_ARB);
-
-      /* setup vertex arrays */
-      _mesa_VertexPointer(3, GL_FLOAT, sizeof(struct vertex), OFFSET(x));
-      _mesa_TexCoordPointer(2, GL_FLOAT, sizeof(struct vertex), OFFSET(s));
-      _mesa_EnableClientState(GL_VERTEX_ARRAY);
-      _mesa_EnableClientState(GL_TEXTURE_COORD_ARRAY);
-   }
-   else {
-      _mesa_BindVertexArray(copypix->ArrayObj);
-      _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, copypix->VBO);
-   }
-
-   newTex = alloc_texture(tex, width, height, intFormat);
-
-   /* vertex positions, texcoords (after texture allocation!) */
-   {
-      const GLfloat dstX0 = (GLfloat) dstX;
-      const GLfloat dstY0 = (GLfloat) dstY;
-      const GLfloat dstX1 = dstX + width * ctx->Pixel.ZoomX;
-      const GLfloat dstY1 = dstY + height * ctx->Pixel.ZoomY;
-      const GLfloat z = invert_z(ctx->Current.RasterPos[2]);
-
-      verts[0].x = dstX0;
-      verts[0].y = dstY0;
-      verts[0].z = z;
-      verts[0].s = 0.0F;
-      verts[0].t = 0.0F;
-      verts[1].x = dstX1;
-      verts[1].y = dstY0;
-      verts[1].z = z;
-      verts[1].s = tex->Sright;
-      verts[1].t = 0.0F;
-      verts[2].x = dstX1;
-      verts[2].y = dstY1;
-      verts[2].z = z;
-      verts[2].s = tex->Sright;
-      verts[2].t = tex->Ttop;
-      verts[3].x = dstX0;
-      verts[3].y = dstY1;
-      verts[3].z = z;
-      verts[3].s = 0.0F;
-      verts[3].t = tex->Ttop;
-
-      /* upload new vertex data */
-      _mesa_BufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);
-   }
-
-   /* Alloc/setup texture */
-   setup_copypix_texture(tex, newTex, srcX, srcY, width, height,
-                         GL_RGBA, GL_NEAREST);
-
-   _mesa_set_enable(ctx, tex->Target, GL_TRUE);
-
-   /* draw textured quad */
-   _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
-
-   _mesa_set_enable(ctx, tex->Target, GL_FALSE);
-
-   _mesa_meta_end(ctx);
-}
-
-
-
-/**
- * When the glDrawPixels() image size is greater than the max rectangle
- * texture size we use this function to break the glDrawPixels() image
- * into tiles which fit into the max texture size.
- */
-static void
-tiled_draw_pixels(struct gl_context *ctx,
-                  GLint tileSize,
-                  GLint x, GLint y, GLsizei width, GLsizei height,
-                  GLenum format, GLenum type,
-                  const struct gl_pixelstore_attrib *unpack,
-                  const GLvoid *pixels)
-{
-   struct gl_pixelstore_attrib tileUnpack = *unpack;
-   GLint i, j;
-
-   if (tileUnpack.RowLength == 0)
-      tileUnpack.RowLength = width;
-
-   for (i = 0; i < width; i += tileSize) {
-      const GLint tileWidth = MIN2(tileSize, width - i);
-      const GLint tileX = (GLint) (x + i * ctx->Pixel.ZoomX);
-
-      tileUnpack.SkipPixels = unpack->SkipPixels + i;
-
-      for (j = 0; j < height; j += tileSize) {
-         const GLint tileHeight = MIN2(tileSize, height - j);
-         const GLint tileY = (GLint) (y + j * ctx->Pixel.ZoomY);
-
-         tileUnpack.SkipRows = unpack->SkipRows + j;
-
-         _mesa_meta_DrawPixels(ctx, tileX, tileY, tileWidth, tileHeight,
-                               format, type, &tileUnpack, pixels);
-      }
-   }
-}
-
-
-/**
- * One-time init for drawing stencil pixels.
- */
-static void
-init_draw_stencil_pixels(struct gl_context *ctx)
-{
-   /* This program is run eight times, once for each stencil bit.
-    * The stencil values to draw are found in an 8-bit alpha texture.
-    * We read the texture/stencil value and test if bit 'b' is set.
-    * If the bit is not set, use KIL to kill the fragment.
-    * Finally, we use the stencil test to update the stencil buffer.
-    *
-    * The basic algorithm for checking if a bit is set is:
-    *   if (is_odd(value / (1 << bit)))
-    *      result is one (or non-zero).
-    *   else
-    *      result is zero.
-    * The program parameter contains three values:
-    *   parm.x = 255 / (1 << bit)
-    *   parm.y = 0.5
-    *   parm.z = 0.0
-    */
-   static const char *program =
-      "!!ARBfp1.0\n"
-      "PARAM parm = program.local[0]; \n"
-      "TEMP t; \n"
-      "TEX t, fragment.texcoord[0], texture[0], %s; \n"   /* NOTE %s here! */
-      "# t = t * 255 / bit \n"
-      "MUL t.x, t.a, parm.x; \n"
-      "# t = (int) t \n"
-      "FRC t.y, t.x; \n"
-      "SUB t.x, t.x, t.y; \n"
-      "# t = t * 0.5 \n"
-      "MUL t.x, t.x, parm.y; \n"
-      "# t = fract(t.x) \n"
-      "FRC t.x, t.x; # if t.x != 0, then the bit is set \n"
-      "# t.x = (t.x == 0 ? 1 : 0) \n"
-      "SGE t.x, -t.x, parm.z; \n"
-      "KIL -t.x; \n"
-      "# for debug only \n"
-      "#MOV result.color, t.x; \n"
-      "END \n";
-   char program2[1000];
-   struct drawpix_state *drawpix = &ctx->Meta->DrawPix;
-   struct temp_texture *tex = get_temp_texture(ctx);
-   const char *texTarget;
-
-   assert(drawpix->StencilFP == 0);
-
-   /* replace %s with "RECT" or "2D" */
-   assert(strlen(program) + 4 < sizeof(program2));
-   if (tex->Target == GL_TEXTURE_RECTANGLE)
-      texTarget = "RECT";
-   else
-      texTarget = "2D";
-   _mesa_snprintf(program2, sizeof(program2), program, texTarget);
-
-   _mesa_GenPrograms(1, &drawpix->StencilFP);
-   _mesa_BindProgram(GL_FRAGMENT_PROGRAM_ARB, drawpix->StencilFP);
-   _mesa_ProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
-                          strlen(program2), (const GLubyte *) program2);
-}
-
-
-/**
- * One-time init for drawing depth pixels.
- */
-static void
-init_draw_depth_pixels(struct gl_context *ctx)
-{
-   static const char *program =
-      "!!ARBfp1.0\n"
-      "PARAM color = program.local[0]; \n"
-      "TEX result.depth, fragment.texcoord[0], texture[0], %s; \n"
-      "MOV result.color, color; \n"
-      "END \n";
-   char program2[200];
-   struct drawpix_state *drawpix = &ctx->Meta->DrawPix;
-   struct temp_texture *tex = get_temp_texture(ctx);
-   const char *texTarget;
-
-   assert(drawpix->DepthFP == 0);
-
-   /* replace %s with "RECT" or "2D" */
-   assert(strlen(program) + 4 < sizeof(program2));
-   if (tex->Target == GL_TEXTURE_RECTANGLE)
-      texTarget = "RECT";
-   else
-      texTarget = "2D";
-   _mesa_snprintf(program2, sizeof(program2), program, texTarget);
-
-   _mesa_GenPrograms(1, &drawpix->DepthFP);
-   _mesa_BindProgram(GL_FRAGMENT_PROGRAM_ARB, drawpix->DepthFP);
-   _mesa_ProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
-                          strlen(program2), (const GLubyte *) program2);
-}
-
-
-/**
- * Meta implementation of ctx->Driver.DrawPixels() in terms
- * of texture mapping and polygon rendering.
- */
-void
-_mesa_meta_DrawPixels(struct gl_context *ctx,
-                      GLint x, GLint y, GLsizei width, GLsizei height,
-                      GLenum format, GLenum type,
-                      const struct gl_pixelstore_attrib *unpack,
-                      const GLvoid *pixels)
-{
-   struct drawpix_state *drawpix = &ctx->Meta->DrawPix;
-   struct temp_texture *tex = get_temp_texture(ctx);
-   const struct gl_pixelstore_attrib unpackSave = ctx->Unpack;
-   const GLuint origStencilMask = ctx->Stencil.WriteMask[0];
-   struct vertex {
-      GLfloat x, y, z, s, t;
-   };
-   struct vertex verts[4];
-   GLenum texIntFormat;
-   GLboolean fallback, newTex;
-   GLbitfield metaExtraSave = 0x0;
-   GLuint vbo;
-
-   /*
-    * Determine if we can do the glDrawPixels with texture mapping.
-    */
-   fallback = GL_FALSE;
-   if (ctx->_ImageTransferState ||
-       ctx->Fog.Enabled) {
-      fallback = GL_TRUE;
-   }
-
-   if (_mesa_is_color_format(format)) {
-      /* use more compact format when possible */
-      /* XXX disable special case for GL_LUMINANCE for now to work around
-       * apparent i965 driver bug (see bug #23670).
-       */
-      if (/*format == GL_LUMINANCE ||*/ format == GL_LUMINANCE_ALPHA)
-         texIntFormat = format;
-      else
-         texIntFormat = GL_RGBA;
-
-      /* If we're not supposed to clamp the resulting color, then just
-       * promote our texture to fully float.  We could do better by
-       * just going for the matching set of channels, in floating
-       * point.
-       */
-      if (ctx->Color.ClampFragmentColor != GL_TRUE)
-	 texIntFormat = GL_RGBA32F;
-   }
-   else if (_mesa_is_stencil_format(format)) {
-      if (ctx->Extensions.ARB_fragment_program &&
-          ctx->Pixel.IndexShift == 0 &&
-          ctx->Pixel.IndexOffset == 0 &&
-          type == GL_UNSIGNED_BYTE) {
-         /* We'll store stencil as alpha.  This only works for GLubyte
-          * image data because of how incoming values are mapped to alpha
-          * in [0,1].
-          */
-         texIntFormat = GL_ALPHA;
-         metaExtraSave = (META_COLOR_MASK |
-                          META_DEPTH_TEST |
-                          META_SHADER |
-                          META_STENCIL_TEST);
-      }
-      else {
-         fallback = GL_TRUE;
-      }
-   }
-   else if (_mesa_is_depth_format(format)) {
-      if (ctx->Extensions.ARB_depth_texture &&
-          ctx->Extensions.ARB_fragment_program) {
-         texIntFormat = GL_DEPTH_COMPONENT;
-         metaExtraSave = (META_SHADER);
-      }
-      else {
-         fallback = GL_TRUE;
-      }
-   }
-   else {
-      fallback = GL_TRUE;
-   }
-
-   if (fallback) {
-      _swrast_DrawPixels(ctx, x, y, width, height,
-                         format, type, unpack, pixels);
-      return;
-   }
-
-   /*
-    * Check image size against max texture size, draw as tiles if needed.
-    */
-   if (width > tex->MaxSize || height > tex->MaxSize) {
-      tiled_draw_pixels(ctx, tex->MaxSize, x, y, width, height,
-                        format, type, unpack, pixels);
-      return;
-   }
-
-   /* Most GL state applies to glDrawPixels (like blending, stencil, etc),
-    * but a there's a few things we need to override:
-    */
-   _mesa_meta_begin(ctx, (META_RASTERIZATION |
-                          META_SHADER |
-                          META_TEXTURE |
-                          META_TRANSFORM |
-                          META_VERTEX |
-                          META_VIEWPORT |
-			  META_CLAMP_FRAGMENT_COLOR |
-                          metaExtraSave));
-
-   newTex = alloc_texture(tex, width, height, texIntFormat);
-
-   /* vertex positions, texcoords (after texture allocation!) */
-   {
-      const GLfloat x0 = (GLfloat) x;
-      const GLfloat y0 = (GLfloat) y;
-      const GLfloat x1 = x + width * ctx->Pixel.ZoomX;
-      const GLfloat y1 = y + height * ctx->Pixel.ZoomY;
-      const GLfloat z = invert_z(ctx->Current.RasterPos[2]);
-
-      verts[0].x = x0;
-      verts[0].y = y0;
-      verts[0].z = z;
-      verts[0].s = 0.0F;
-      verts[0].t = 0.0F;
-      verts[1].x = x1;
-      verts[1].y = y0;
-      verts[1].z = z;
-      verts[1].s = tex->Sright;
-      verts[1].t = 0.0F;
-      verts[2].x = x1;
-      verts[2].y = y1;
-      verts[2].z = z;
-      verts[2].s = tex->Sright;
-      verts[2].t = tex->Ttop;
-      verts[3].x = x0;
-      verts[3].y = y1;
-      verts[3].z = z;
-      verts[3].s = 0.0F;
-      verts[3].t = tex->Ttop;
-   }
-
-   if (drawpix->ArrayObj == 0) {
-      /* one-time setup: create vertex array object */
-      _mesa_GenVertexArrays(1, &drawpix->ArrayObj);
-   }
-   _mesa_BindVertexArray(drawpix->ArrayObj);
-
-   /* create vertex array buffer */
-   _mesa_GenBuffersARB(1, &vbo);
-   _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, vbo);
-   _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts),
-                       verts, GL_DYNAMIC_DRAW_ARB);
-
-   /* setup vertex arrays */
-   _mesa_VertexPointer(3, GL_FLOAT, sizeof(struct vertex), OFFSET(x));
-   _mesa_TexCoordPointer(2, GL_FLOAT, sizeof(struct vertex), OFFSET(s));
-   _mesa_EnableClientState(GL_VERTEX_ARRAY);
-   _mesa_EnableClientState(GL_TEXTURE_COORD_ARRAY);
-
-   /* set given unpack params */
-   ctx->Unpack = *unpack;
-
-   _mesa_set_enable(ctx, tex->Target, GL_TRUE);
-
-   if (_mesa_is_stencil_format(format)) {
-      /* Drawing stencil */
-      GLint bit;
-
-      if (!drawpix->StencilFP)
-         init_draw_stencil_pixels(ctx);
-
-      setup_drawpix_texture(ctx, tex, newTex, texIntFormat, width, height,
-                            GL_ALPHA, type, pixels);
-
-      _mesa_ColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
-
-      _mesa_set_enable(ctx, GL_STENCIL_TEST, GL_TRUE);
-
-      /* set all stencil bits to 0 */
-      _mesa_StencilOp(GL_REPLACE, GL_REPLACE, GL_REPLACE);
-      _mesa_StencilFunc(GL_ALWAYS, 0, 255);
-      _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
-  
-      /* set stencil bits to 1 where needed */
-      _mesa_StencilOp(GL_KEEP, GL_KEEP, GL_REPLACE);
-
-      _mesa_BindProgram(GL_FRAGMENT_PROGRAM_ARB, drawpix->StencilFP);
-      _mesa_set_enable(ctx, GL_FRAGMENT_PROGRAM_ARB, GL_TRUE);
-
-      for (bit = 0; bit < ctx->DrawBuffer->Visual.stencilBits; bit++) {
-         const GLuint mask = 1 << bit;
-         if (mask & origStencilMask) {
-            _mesa_StencilFunc(GL_ALWAYS, mask, mask);
-            _mesa_StencilMask(mask);
-
-            _mesa_ProgramLocalParameter4fARB(GL_FRAGMENT_PROGRAM_ARB, 0,
-                                             255.0 / mask, 0.5, 0.0, 0.0);
-
-            _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
-         }
-      }
-   }
-   else if (_mesa_is_depth_format(format)) {
-      /* Drawing depth */
-      if (!drawpix->DepthFP)
-         init_draw_depth_pixels(ctx);
-
-      _mesa_BindProgram(GL_FRAGMENT_PROGRAM_ARB, drawpix->DepthFP);
-      _mesa_set_enable(ctx, GL_FRAGMENT_PROGRAM_ARB, GL_TRUE);
-
-      /* polygon color = current raster color */
-      _mesa_ProgramLocalParameter4fvARB(GL_FRAGMENT_PROGRAM_ARB, 0,
-                                        ctx->Current.RasterColor);
-
-      setup_drawpix_texture(ctx, tex, newTex, texIntFormat, width, height,
-                            format, type, pixels);
-
-      _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
-   }
-   else {
-      /* Drawing RGBA */
-      setup_drawpix_texture(ctx, tex, newTex, texIntFormat, width, height,
-                            format, type, pixels);
-      _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
-   }
-
-   _mesa_set_enable(ctx, tex->Target, GL_FALSE);
-
-   _mesa_DeleteBuffersARB(1, &vbo);
-
-   /* restore unpack params */
-   ctx->Unpack = unpackSave;
-
-   _mesa_meta_end(ctx);
-}
-
-static GLboolean
-alpha_test_raster_color(struct gl_context *ctx)
-{
-   GLfloat alpha = ctx->Current.RasterColor[ACOMP];
-   GLfloat ref = ctx->Color.AlphaRef;
-
-   switch (ctx->Color.AlphaFunc) {
-      case GL_NEVER:
-	 return GL_FALSE;
-      case GL_LESS:
-	 return alpha < ref;
-      case GL_EQUAL:
-	 return alpha == ref;
-      case GL_LEQUAL:
-	 return alpha <= ref;
-      case GL_GREATER:
-	 return alpha > ref;
-      case GL_NOTEQUAL:
-	 return alpha != ref;
-      case GL_GEQUAL:
-	 return alpha >= ref;
-      case GL_ALWAYS:
-	 return GL_TRUE;
-      default:
-	 assert(0);
-	 return GL_FALSE;
-   }
-}
-
-/**
- * Do glBitmap with a alpha texture quad.  Use the alpha test to cull
- * the 'off' bits.  A bitmap cache as in the gallium/mesa state
- * tracker would improve performance a lot.
- */
-void
-_mesa_meta_Bitmap(struct gl_context *ctx,
-                  GLint x, GLint y, GLsizei width, GLsizei height,
-                  const struct gl_pixelstore_attrib *unpack,
-                  const GLubyte *bitmap1)
-{
-   struct bitmap_state *bitmap = &ctx->Meta->Bitmap;
-   struct temp_texture *tex = get_bitmap_temp_texture(ctx);
-   const GLenum texIntFormat = GL_ALPHA;
-   const struct gl_pixelstore_attrib unpackSave = *unpack;
-   GLubyte fg, bg;
-   struct vertex {
-      GLfloat x, y, z, s, t, r, g, b, a;
-   };
-   struct vertex verts[4];
-   GLboolean newTex;
-   GLubyte *bitmap8;
-
-   /*
-    * Check if swrast fallback is needed.
-    */
-   if (ctx->_ImageTransferState ||
-       ctx->FragmentProgram._Enabled ||
-       ctx->Fog.Enabled ||
-       ctx->Texture._EnabledUnits ||
-       width > tex->MaxSize ||
-       height > tex->MaxSize) {
-      _swrast_Bitmap(ctx, x, y, width, height, unpack, bitmap1);
-      return;
-   }
-
-   if (ctx->Color.AlphaEnabled && !alpha_test_raster_color(ctx))
-      return;
-
-   /* Most GL state applies to glBitmap (like blending, stencil, etc),
-    * but a there's a few things we need to override:
-    */
-   _mesa_meta_begin(ctx, (META_ALPHA_TEST |
-                          META_PIXEL_STORE |
-                          META_RASTERIZATION |
-                          META_SHADER |
-                          META_TEXTURE |
-                          META_TRANSFORM |
-                          META_VERTEX |
-                          META_VIEWPORT));
-
-   if (bitmap->ArrayObj == 0) {
-      /* one-time setup */
-
-      /* create vertex array object */
-      _mesa_GenVertexArraysAPPLE(1, &bitmap->ArrayObj);
-      _mesa_BindVertexArrayAPPLE(bitmap->ArrayObj);
-
-      /* create vertex array buffer */
-      _mesa_GenBuffersARB(1, &bitmap->VBO);
-      _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, bitmap->VBO);
-      _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts),
-                          NULL, GL_DYNAMIC_DRAW_ARB);
-
-      /* setup vertex arrays */
-      _mesa_VertexPointer(3, GL_FLOAT, sizeof(struct vertex), OFFSET(x));
-      _mesa_TexCoordPointer(2, GL_FLOAT, sizeof(struct vertex), OFFSET(s));
-      _mesa_ColorPointer(4, GL_FLOAT, sizeof(struct vertex), OFFSET(r));
-      _mesa_EnableClientState(GL_VERTEX_ARRAY);
-      _mesa_EnableClientState(GL_TEXTURE_COORD_ARRAY);
-      _mesa_EnableClientState(GL_COLOR_ARRAY);
-   }
-   else {
-      _mesa_BindVertexArray(bitmap->ArrayObj);
-      _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, bitmap->VBO);
-   }
-
-   newTex = alloc_texture(tex, width, height, texIntFormat);
-
-   /* vertex positions, texcoords, colors (after texture allocation!) */
-   {
-      const GLfloat x0 = (GLfloat) x;
-      const GLfloat y0 = (GLfloat) y;
-      const GLfloat x1 = (GLfloat) (x + width);
-      const GLfloat y1 = (GLfloat) (y + height);
-      const GLfloat z = invert_z(ctx->Current.RasterPos[2]);
-      GLuint i;
-
-      verts[0].x = x0;
-      verts[0].y = y0;
-      verts[0].z = z;
-      verts[0].s = 0.0F;
-      verts[0].t = 0.0F;
-      verts[1].x = x1;
-      verts[1].y = y0;
-      verts[1].z = z;
-      verts[1].s = tex->Sright;
-      verts[1].t = 0.0F;
-      verts[2].x = x1;
-      verts[2].y = y1;
-      verts[2].z = z;
-      verts[2].s = tex->Sright;
-      verts[2].t = tex->Ttop;
-      verts[3].x = x0;
-      verts[3].y = y1;
-      verts[3].z = z;
-      verts[3].s = 0.0F;
-      verts[3].t = tex->Ttop;
-
-      for (i = 0; i < 4; i++) {
-         verts[i].r = ctx->Current.RasterColor[0];
-         verts[i].g = ctx->Current.RasterColor[1];
-         verts[i].b = ctx->Current.RasterColor[2];
-         verts[i].a = ctx->Current.RasterColor[3];
-      }
-
-      /* upload new vertex data */
-      _mesa_BufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);
-   }
-
-   /* choose different foreground/background alpha values */
-   CLAMPED_FLOAT_TO_UBYTE(fg, ctx->Current.RasterColor[ACOMP]);
-   bg = (fg > 127 ? 0 : 255);
-
-   bitmap1 = _mesa_map_pbo_source(ctx, &unpackSave, bitmap1);
-   if (!bitmap1) {
-      _mesa_meta_end(ctx);
-      return;
-   }
-
-   bitmap8 = (GLubyte *) malloc(width * height);
-   if (bitmap8) {
-      memset(bitmap8, bg, width * height);
-      _mesa_expand_bitmap(width, height, &unpackSave, bitmap1,
-                          bitmap8, width, fg);
-
-      _mesa_set_enable(ctx, tex->Target, GL_TRUE);
-
-      _mesa_set_enable(ctx, GL_ALPHA_TEST, GL_TRUE);
-      _mesa_AlphaFunc(GL_NOTEQUAL, UBYTE_TO_FLOAT(bg));
-
-      setup_drawpix_texture(ctx, tex, newTex, texIntFormat, width, height,
-                            GL_ALPHA, GL_UNSIGNED_BYTE, bitmap8);
-
-      _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
-
-      _mesa_set_enable(ctx, tex->Target, GL_FALSE);
-
-      free(bitmap8);
-   }
-
-   _mesa_unmap_pbo_source(ctx, &unpackSave);
-
-   _mesa_meta_end(ctx);
-}
-
-
-/**
- * Check if the call to _mesa_meta_GenerateMipmap() will require a
- * software fallback.  The fallback path will require that the texture
- * images are mapped.
- * \return GL_TRUE if a fallback is needed, GL_FALSE otherwise
- */
-GLboolean
-_mesa_meta_check_generate_mipmap_fallback(struct gl_context *ctx, GLenum target,
-                                          struct gl_texture_object *texObj)
-{
-   const GLuint fboSave = ctx->DrawBuffer->Name;
-   struct gen_mipmap_state *mipmap = &ctx->Meta->Mipmap;
-   struct gl_texture_image *baseImage;
-   GLuint srcLevel;
-   GLenum status;
-
-   /* check for fallbacks */
-   if (!ctx->Extensions.EXT_framebuffer_object ||
-       target == GL_TEXTURE_3D) {
-      return GL_TRUE;
-   }
-
-   srcLevel = texObj->BaseLevel;
-   baseImage = _mesa_select_tex_image(ctx, texObj, target, srcLevel);
-   if (!baseImage || _mesa_is_format_compressed(baseImage->TexFormat)) {
-      return GL_TRUE;
-   }
-
-   /*
-    * Test that we can actually render in the texture's format.
-    */
-   if (!mipmap->FBO)
-      _mesa_GenFramebuffersEXT(1, &mipmap->FBO);
-   _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, mipmap->FBO);
-
-   if (target == GL_TEXTURE_1D) {
-      _mesa_FramebufferTexture1DEXT(GL_FRAMEBUFFER_EXT,
-                                    GL_COLOR_ATTACHMENT0_EXT,
-                                    target, texObj->Name, srcLevel);
-   }
-#if 0
-   /* other work is needed to enable 3D mipmap generation */
-   else if (target == GL_TEXTURE_3D) {
-      GLint zoffset = 0;
-      _mesa_FramebufferTexture3DEXT(GL_FRAMEBUFFER_EXT,
-                                    GL_COLOR_ATTACHMENT0_EXT,
-                                    target, texObj->Name, srcLevel, zoffset);
-   }
-#endif
-   else {
-      /* 2D / cube */
-      _mesa_FramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
-                                    GL_COLOR_ATTACHMENT0_EXT,
-                                    target, texObj->Name, srcLevel);
-   }
-
-   status = _mesa_CheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
-
-   _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, fboSave);
-
-   if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
-      return GL_TRUE;
-   }
-
-   return GL_FALSE;
-}
-
-
-/**
- * Called via ctx->Driver.GenerateMipmap()
- * Note: texture borders and 3D texture support not yet complete.
- */
-void
-_mesa_meta_GenerateMipmap(struct gl_context *ctx, GLenum target,
-                          struct gl_texture_object *texObj)
-{
-   struct gen_mipmap_state *mipmap = &ctx->Meta->Mipmap;
-   struct vertex {
-      GLfloat x, y, s, t, r;
-   };
-   struct vertex verts[4];
-   const GLuint baseLevel = texObj->BaseLevel;
-   const GLuint maxLevel = texObj->MaxLevel;
-   const GLenum minFilterSave = texObj->Sampler.MinFilter;
-   const GLenum magFilterSave = texObj->Sampler.MagFilter;
-   const GLint maxLevelSave = texObj->MaxLevel;
-   const GLboolean genMipmapSave = texObj->GenerateMipmap;
-   const GLenum wrapSSave = texObj->Sampler.WrapS;
-   const GLenum wrapTSave = texObj->Sampler.WrapT;
-   const GLenum wrapRSave = texObj->Sampler.WrapR;
-   const GLuint fboSave = ctx->DrawBuffer->Name;
-   const GLuint original_active_unit = ctx->Texture.CurrentUnit;
-   GLenum faceTarget;
-   GLuint dstLevel;
-   GLuint border = 0;
-
-   if (_mesa_meta_check_generate_mipmap_fallback(ctx, target, texObj)) {
-      _mesa_generate_mipmap(ctx, target, texObj);
-      return;
-   }
-
-   if (target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X &&
-       target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z) {
-      faceTarget = target;
-      target = GL_TEXTURE_CUBE_MAP;
-   }
-   else {
-      faceTarget = target;
-   }
-
-   _mesa_meta_begin(ctx, META_ALL);
-
-   if (original_active_unit != 0)
-      _mesa_BindTexture(target, texObj->Name);
-
-   if (mipmap->ArrayObj == 0) {
-      /* one-time setup */
-
-      /* create vertex array object */
-      _mesa_GenVertexArraysAPPLE(1, &mipmap->ArrayObj);
-      _mesa_BindVertexArrayAPPLE(mipmap->ArrayObj);
-
-      /* create vertex array buffer */
-      _mesa_GenBuffersARB(1, &mipmap->VBO);
-      _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, mipmap->VBO);
-      _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts),
-                          NULL, GL_DYNAMIC_DRAW_ARB);
-
-      /* setup vertex arrays */
-      _mesa_VertexPointer(2, GL_FLOAT, sizeof(struct vertex), OFFSET(x));
-      _mesa_TexCoordPointer(3, GL_FLOAT, sizeof(struct vertex), OFFSET(s));
-      _mesa_EnableClientState(GL_VERTEX_ARRAY);
-      _mesa_EnableClientState(GL_TEXTURE_COORD_ARRAY);
-   }
-   else {
-      _mesa_BindVertexArray(mipmap->ArrayObj);
-      _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, mipmap->VBO);
-   }
-
-   if (!mipmap->FBO) {
-      _mesa_GenFramebuffersEXT(1, &mipmap->FBO);
-   }
-   _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, mipmap->FBO);
-
-   _mesa_TexParameteri(target, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
-   _mesa_TexParameteri(target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-   _mesa_TexParameteri(target, GL_GENERATE_MIPMAP, GL_FALSE);
-   _mesa_TexParameteri(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
-   _mesa_TexParameteri(target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
-   _mesa_TexParameteri(target, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
-
-   _mesa_set_enable(ctx, target, GL_TRUE);
-
-   /* setup texcoords once (XXX what about border?) */
-   switch (faceTarget) {
-   case GL_TEXTURE_1D:
-   case GL_TEXTURE_2D:
-      verts[0].s = 0.0F;
-      verts[0].t = 0.0F;
-      verts[0].r = 0.0F;
-      verts[1].s = 1.0F;
-      verts[1].t = 0.0F;
-      verts[1].r = 0.0F;
-      verts[2].s = 1.0F;
-      verts[2].t = 1.0F;
-      verts[2].r = 0.0F;
-      verts[3].s = 0.0F;
-      verts[3].t = 1.0F;
-      verts[3].r = 0.0F;
-      break;
-   case GL_TEXTURE_3D:
-      abort();
-      break;
-   default:
-      /* cube face */
-      {
-         static const GLfloat st[4][2] = {
-            {0.0f, 0.0f}, {1.0f, 0.0f}, {1.0f, 1.0f}, {0.0f, 1.0f}
-         };
-         GLuint i;
-
-         /* loop over quad verts */
-         for (i = 0; i < 4; i++) {
-            /* Compute sc = +/-scale and tc = +/-scale.
-             * Not +/-1 to avoid cube face selection ambiguity near the edges,
-             * though that can still sometimes happen with this scale factor...
-             */
-            const GLfloat scale = 0.9999f;
-            const GLfloat sc = (2.0f * st[i][0] - 1.0f) * scale;
-            const GLfloat tc = (2.0f * st[i][1] - 1.0f) * scale;
-
-            switch (faceTarget) {
-            case GL_TEXTURE_CUBE_MAP_POSITIVE_X:
-               verts[i].s = 1.0f;
-               verts[i].t = -tc;
-               verts[i].r = -sc;
-               break;
-            case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
-               verts[i].s = -1.0f;
-               verts[i].t = -tc;
-               verts[i].r = sc;
-               break;
-            case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
-               verts[i].s = sc;
-               verts[i].t = 1.0f;
-               verts[i].r = tc;
-               break;
-            case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
-               verts[i].s = sc;
-               verts[i].t = -1.0f;
-               verts[i].r = -tc;
-               break;
-            case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
-               verts[i].s = sc;
-               verts[i].t = -tc;
-               verts[i].r = 1.0f;
-               break;
-            case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
-               verts[i].s = -sc;
-               verts[i].t = -tc;
-               verts[i].r = -1.0f;
-               break;
-            default:
-               assert(0);
-            }
-         }
-      }
-   }
-
-   _mesa_set_enable(ctx, target, GL_TRUE);
-
-   /* setup vertex positions */
-   {
-      verts[0].x = 0.0F;
-      verts[0].y = 0.0F;
-      verts[1].x = 1.0F;
-      verts[1].y = 0.0F;
-      verts[2].x = 1.0F;
-      verts[2].y = 1.0F;
-      verts[3].x = 0.0F;
-      verts[3].y = 1.0F;
-      
-      /* upload new vertex data */
-      _mesa_BufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);
-   }
-
-   /* setup projection matrix */
-   _mesa_MatrixMode(GL_PROJECTION);
-   _mesa_LoadIdentity();
-   _mesa_Ortho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
-
-   /* texture is already locked, unlock now */
-   _mesa_unlock_texture(ctx, texObj);
-
-   for (dstLevel = baseLevel + 1; dstLevel <= maxLevel; dstLevel++) {
-      const struct gl_texture_image *srcImage;
-      const GLuint srcLevel = dstLevel - 1;
-      GLsizei srcWidth, srcHeight, srcDepth;
-      GLsizei dstWidth, dstHeight, dstDepth;
-      GLenum status;
-
-      srcImage = _mesa_select_tex_image(ctx, texObj, faceTarget, srcLevel);
-      assert(srcImage->Border == 0); /* XXX we can fix this */
-
-      /* src size w/out border */
-      srcWidth = srcImage->Width - 2 * border;
-      srcHeight = srcImage->Height - 2 * border;
-      srcDepth = srcImage->Depth - 2 * border;
-
-      /* new dst size w/ border */
-      dstWidth = MAX2(1, srcWidth / 2) + 2 * border;
-      dstHeight = MAX2(1, srcHeight / 2) + 2 * border;
-      dstDepth = MAX2(1, srcDepth / 2) + 2 * border;
-
-      if (dstWidth == srcImage->Width &&
-          dstHeight == srcImage->Height &&
-          dstDepth == srcImage->Depth) {
-         /* all done */
-         break;
-      }
-
-      /* Set MaxLevel large enough to hold the new level when we allocate it  */
-      _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, dstLevel);
-
-      /* Create empty dest image */
-      if (target == GL_TEXTURE_1D) {
-         _mesa_TexImage1D(target, dstLevel, srcImage->InternalFormat,
-                          dstWidth, border,
-                          GL_RGBA, GL_UNSIGNED_BYTE, NULL);
-      }
-      else if (target == GL_TEXTURE_3D) {
-         _mesa_TexImage3D(target, dstLevel, srcImage->InternalFormat,
-                          dstWidth, dstHeight, dstDepth, border,
-                          GL_RGBA, GL_UNSIGNED_BYTE, NULL);
-      }
-      else {
-         /* 2D or cube */
-         _mesa_TexImage2D(faceTarget, dstLevel, srcImage->InternalFormat,
-                          dstWidth, dstHeight, border,
-                          GL_RGBA, GL_UNSIGNED_BYTE, NULL);
-
-         if (target == GL_TEXTURE_CUBE_MAP) {
-            /* If texturing from a cube, we need to make sure all src faces
-             * have been defined (even if we're not sampling from them.)
-             * Otherwise the texture object will be 'incomplete' and
-             * texturing from it will not be allowed.
-             */
-            GLuint face;
-            for (face = 0; face < 6; face++) {
-               if (!texObj->Image[face][srcLevel] ||
-                   texObj->Image[face][srcLevel]->Width != srcWidth) {
-                  _mesa_TexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + face,
-                                   srcLevel, srcImage->InternalFormat,
-                                   srcWidth, srcHeight, border,
-                                   GL_RGBA, GL_UNSIGNED_BYTE, NULL);
-               }
-            }
-         }
-      }
-
-      /* limit minification to src level */
-      _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, srcLevel);
-
-      /* Set to draw into the current dstLevel */
-      if (target == GL_TEXTURE_1D) {
-         _mesa_FramebufferTexture1DEXT(GL_FRAMEBUFFER_EXT,
-                                       GL_COLOR_ATTACHMENT0_EXT,
-                                       target,
-                                       texObj->Name,
-                                       dstLevel);
-      }
-      else if (target == GL_TEXTURE_3D) {
-         GLint zoffset = 0; /* XXX unfinished */
-         _mesa_FramebufferTexture3DEXT(GL_FRAMEBUFFER_EXT,
-                                       GL_COLOR_ATTACHMENT0_EXT,
-                                       target,
-                                       texObj->Name,
-                                       dstLevel, zoffset);
-      }
-      else {
-         /* 2D / cube */
-         _mesa_FramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
-                                       GL_COLOR_ATTACHMENT0_EXT,
-                                       faceTarget,
-                                       texObj->Name,
-                                       dstLevel);
-      }
-
-      _mesa_DrawBuffer(GL_COLOR_ATTACHMENT0_EXT);
-
-      /* sanity check */
-      status = _mesa_CheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
-      if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
-         abort();
-         break;
-      }
-
-      assert(dstWidth == ctx->DrawBuffer->Width);
-      assert(dstHeight == ctx->DrawBuffer->Height);
-
-      /* setup viewport */
-      _mesa_set_viewport(ctx, 0, 0, dstWidth, dstHeight);
-
-      _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
-   }
-
-   _mesa_lock_texture(ctx, texObj); /* relock */
-
-   _mesa_meta_end(ctx);
-
-   _mesa_TexParameteri(target, GL_TEXTURE_MIN_FILTER, minFilterSave);
-   _mesa_TexParameteri(target, GL_TEXTURE_MAG_FILTER, magFilterSave);
-   _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, maxLevelSave);
-   _mesa_TexParameteri(target, GL_GENERATE_MIPMAP, genMipmapSave);
-   _mesa_TexParameteri(target, GL_TEXTURE_WRAP_S, wrapSSave);
-   _mesa_TexParameteri(target, GL_TEXTURE_WRAP_T, wrapTSave);
-   _mesa_TexParameteri(target, GL_TEXTURE_WRAP_R, wrapRSave);
-
-   _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, fboSave);
-}
-
-
-/**
- * Determine the GL data type to use for the temporary image read with
- * ReadPixels() and passed to Tex[Sub]Image().
- */
-static GLenum
-get_temp_image_type(struct gl_context *ctx, GLenum baseFormat)
-{
-   switch (baseFormat) {
-   case GL_RGBA:
-   case GL_RGB:
-   case GL_ALPHA:
-   case GL_LUMINANCE:
-   case GL_LUMINANCE_ALPHA:
-   case GL_INTENSITY:
-      if (ctx->DrawBuffer->Visual.redBits <= 8)
-         return GL_UNSIGNED_BYTE;
-      else if (ctx->DrawBuffer->Visual.redBits <= 8)
-         return GL_UNSIGNED_SHORT;
-      else
-         return GL_FLOAT;
-   case GL_DEPTH_COMPONENT:
-      return GL_UNSIGNED_INT;
-   case GL_DEPTH_STENCIL:
-      return GL_UNSIGNED_INT_24_8;
-   default:
-      _mesa_problem(ctx, "Unexpected format in get_temp_image_type()");
-      return 0;
-   }
-}
-
-
-/**
- * Helper for _mesa_meta_CopyTexImage1/2D() functions.
- * Have to be careful with locking and meta state for pixel transfer.
- */
-static void
-copy_tex_image(struct gl_context *ctx, GLuint dims, GLenum target, GLint level,
-               GLenum internalFormat, GLint x, GLint y,
-               GLsizei width, GLsizei height, GLint border)
-{
-   struct gl_texture_object *texObj;
-   struct gl_texture_image *texImage;
-   GLenum format, type;
-   GLint bpp;
-   void *buf;
-
-   texObj = _mesa_get_current_tex_object(ctx, target);
-   texImage = _mesa_get_tex_image(ctx, texObj, target, level);
-
-   /* Choose format/type for temporary image buffer */
-   format = _mesa_base_tex_format(ctx, internalFormat);
-   type = get_temp_image_type(ctx, format);
-   bpp = _mesa_bytes_per_pixel(format, type);
-   if (bpp <= 0) {
-      _mesa_problem(ctx, "Bad bpp in meta copy_tex_image()");
-      return;
-   }
-
-   /*
-    * Alloc image buffer (XXX could use a PBO)
-    */
-   buf = malloc(width * height * bpp);
-   if (!buf) {
-      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexImage%uD", dims);
-      return;
-   }
-
-   _mesa_unlock_texture(ctx, texObj); /* need to unlock first */
-
-   /*
-    * Read image from framebuffer (disable pixel transfer ops)
-    */
-   _mesa_meta_begin(ctx, META_PIXEL_STORE | META_PIXEL_TRANSFER);
-   ctx->Driver.ReadPixels(ctx, x, y, width, height,
-			  format, type, &ctx->Pack, buf);
-   _mesa_meta_end(ctx);
-
-   if (texImage->Data) {
-      ctx->Driver.FreeTexImageData(ctx, texImage);
-   }
-
-   /* The texture's format was already chosen in _mesa_CopyTexImage() */
-   ASSERT(texImage->TexFormat != MESA_FORMAT_NONE);
-
-   /*
-    * Store texture data (with pixel transfer ops)
-    */
-   _mesa_meta_begin(ctx, META_PIXEL_STORE);
-
-   _mesa_update_state(ctx); /* to update pixel transfer state */
-
-   if (target == GL_TEXTURE_1D) {
-      ctx->Driver.TexImage1D(ctx, target, level, internalFormat,
-                             width, border, format, type,
-                             buf, &ctx->Unpack, texObj, texImage);
-   }
-   else {
-      ctx->Driver.TexImage2D(ctx, target, level, internalFormat,
-                             width, height, border, format, type,
-                             buf, &ctx->Unpack, texObj, texImage);
-   }
-   _mesa_meta_end(ctx);
-
-   _mesa_lock_texture(ctx, texObj); /* re-lock */
-
-   free(buf);
-}
-
-
-void
-_mesa_meta_CopyTexImage1D(struct gl_context *ctx, GLenum target, GLint level,
-                          GLenum internalFormat, GLint x, GLint y,
-                          GLsizei width, GLint border)
-{
-   copy_tex_image(ctx, 1, target, level, internalFormat, x, y,
-                  width, 1, border);
-}
-
-
-void
-_mesa_meta_CopyTexImage2D(struct gl_context *ctx, GLenum target, GLint level,
-                          GLenum internalFormat, GLint x, GLint y,
-                          GLsizei width, GLsizei height, GLint border)
-{
-   copy_tex_image(ctx, 2, target, level, internalFormat, x, y,
-                  width, height, border);
-}
-
-
-
-/**
- * Helper for _mesa_meta_CopyTexSubImage1/2/3D() functions.
- * Have to be careful with locking and meta state for pixel transfer.
- */
-static void
-copy_tex_sub_image(struct gl_context *ctx,
-                   GLuint dims, GLenum target, GLint level,
-                   GLint xoffset, GLint yoffset, GLint zoffset,
-                   GLint x, GLint y,
-                   GLsizei width, GLsizei height)
-{
-   struct gl_texture_object *texObj;
-   struct gl_texture_image *texImage;
-   GLenum format, type;
-   GLint bpp;
-   void *buf;
-
-   texObj = _mesa_get_current_tex_object(ctx, target);
-   texImage = _mesa_select_tex_image(ctx, texObj, target, level);
-
-   /* Choose format/type for temporary image buffer */
-   format = _mesa_get_format_base_format(texImage->TexFormat);
-   type = get_temp_image_type(ctx, format);
-   bpp = _mesa_bytes_per_pixel(format, type);
-   if (bpp <= 0) {
-      _mesa_problem(ctx, "Bad bpp in meta copy_tex_sub_image()");
-      return;
-   }
-
-   /*
-    * Alloc image buffer (XXX could use a PBO)
-    */
-   buf = malloc(width * height * bpp);
-   if (!buf) {
-      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage%uD", dims);
-      return;
-   }
-
-   _mesa_unlock_texture(ctx, texObj); /* need to unlock first */
-
-   /*
-    * Read image from framebuffer (disable pixel transfer ops)
-    */
-   _mesa_meta_begin(ctx, META_PIXEL_STORE | META_PIXEL_TRANSFER);
-   ctx->Driver.ReadPixels(ctx, x, y, width, height,
-			  format, type, &ctx->Pack, buf);
-   _mesa_meta_end(ctx);
-
-   _mesa_update_state(ctx); /* to update pixel transfer state */
-
-   /*
-    * Store texture data (with pixel transfer ops)
-    */
-   _mesa_meta_begin(ctx, META_PIXEL_STORE);
-   if (target == GL_TEXTURE_1D) {
-      ctx->Driver.TexSubImage1D(ctx, target, level, xoffset,
-                                width, format, type, buf,
-                                &ctx->Unpack, texObj, texImage);
-   }
-   else if (target == GL_TEXTURE_3D) {
-      ctx->Driver.TexSubImage3D(ctx, target, level, xoffset, yoffset, zoffset,
-                                width, height, 1, format, type, buf,
-                                &ctx->Unpack, texObj, texImage);
-   }
-   else {
-      ctx->Driver.TexSubImage2D(ctx, target, level, xoffset, yoffset,
-                                width, height, format, type, buf,
-                                &ctx->Unpack, texObj, texImage);
-   }
-   _mesa_meta_end(ctx);
-
-   _mesa_lock_texture(ctx, texObj); /* re-lock */
-
-   free(buf);
-}
-
-
-void
-_mesa_meta_CopyTexSubImage1D(struct gl_context *ctx, GLenum target, GLint level,
-                             GLint xoffset,
-                             GLint x, GLint y, GLsizei width)
-{
-   copy_tex_sub_image(ctx, 1, target, level, xoffset, 0, 0,
-                      x, y, width, 1);
-}
-
-
-void
-_mesa_meta_CopyTexSubImage2D(struct gl_context *ctx, GLenum target, GLint level,
-                             GLint xoffset, GLint yoffset,
-                             GLint x, GLint y,
-                             GLsizei width, GLsizei height)
-{
-   copy_tex_sub_image(ctx, 2, target, level, xoffset, yoffset, 0,
-                      x, y, width, height);
-}
-
-
-void
-_mesa_meta_CopyTexSubImage3D(struct gl_context *ctx, GLenum target, GLint level,
-                             GLint xoffset, GLint yoffset, GLint zoffset,
-                             GLint x, GLint y,
-                             GLsizei width, GLsizei height)
-{
-   copy_tex_sub_image(ctx, 3, target, level, xoffset, yoffset, zoffset,
-                      x, y, width, height);
-}
-
-
-void
-_mesa_meta_CopyColorTable(struct gl_context *ctx,
-                          GLenum target, GLenum internalformat,
-                          GLint x, GLint y, GLsizei width)
-{
-   GLfloat *buf;
-
-   buf = (GLfloat *) malloc(width * 4 * sizeof(GLfloat));
-   if (!buf) {
-      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyColorTable");
-      return;
-   }
-
-   /*
-    * Read image from framebuffer (disable pixel transfer ops)
-    */
-   _mesa_meta_begin(ctx, META_PIXEL_STORE | META_PIXEL_TRANSFER);
-   ctx->Driver.ReadPixels(ctx, x, y, width, 1,
-                          GL_RGBA, GL_FLOAT, &ctx->Pack, buf);
-
-   _mesa_ColorTable(target, internalformat, width, GL_RGBA, GL_FLOAT, buf);
-
-   _mesa_meta_end(ctx);
-
-   free(buf);
-}
-
-
-void
-_mesa_meta_CopyColorSubTable(struct gl_context *ctx,GLenum target, GLsizei start,
-                             GLint x, GLint y, GLsizei width)
-{
-   GLfloat *buf;
-
-   buf = (GLfloat *) malloc(width * 4 * sizeof(GLfloat));
-   if (!buf) {
-      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyColorSubTable");
-      return;
-   }
-
-   /*
-    * Read image from framebuffer (disable pixel transfer ops)
-    */
-   _mesa_meta_begin(ctx, META_PIXEL_STORE | META_PIXEL_TRANSFER);
-   ctx->Driver.ReadPixels(ctx, x, y, width, 1,
-                          GL_RGBA, GL_FLOAT, &ctx->Pack, buf);
-
-   _mesa_ColorSubTable(target, start, width, GL_RGBA, GL_FLOAT, buf);
-
-   _mesa_meta_end(ctx);
-
-   free(buf);
-}
+/*

+ * Mesa 3-D graphics library

+ * Version:  7.6

+ *

+ * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.

+ *

+ * Permission is hereby granted, free of charge, to any person obtaining a

+ * copy of this software and associated documentation files (the "Software"),

+ * to deal in the Software without restriction, including without limitation

+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,

+ * and/or sell copies of the Software, and to permit persons to whom the

+ * Software is furnished to do so, subject to the following conditions:

+ *

+ * The above copyright notice and this permission notice shall be included

+ * in all copies or substantial portions of the Software.

+ *

+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN

+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

+ */

+

+/**

+ * Meta operations.  Some GL operations can be expressed in terms of

+ * other GL operations.  For example, glBlitFramebuffer() can be done

+ * with texture mapping and glClear() can be done with polygon rendering.

+ *

+ * \author Brian Paul

+ */

+

+

+#include "main/glheader.h"

+#include "main/mtypes.h"

+#include "main/imports.h"

+#include "main/arbprogram.h"

+#include "main/arrayobj.h"

+#include "main/blend.h"

+#include "main/bufferobj.h"

+#include "main/buffers.h"

+#include "main/colortab.h"

+#include "main/condrender.h"

+#include "main/depth.h"

+#include "main/enable.h"

+#include "main/fbobject.h"

+#include "main/formats.h"

+#include "main/image.h"

+#include "main/macros.h"

+#include "main/matrix.h"

+#include "main/mipmap.h"

+#include "main/pbo.h"

+#include "main/polygon.h"

+#include "main/readpix.h"

+#include "main/scissor.h"

+#include "main/shaderapi.h"

+#include "main/shaderobj.h"

+#include "main/state.h"

+#include "main/stencil.h"

+#include "main/texobj.h"

+#include "main/texenv.h"

+#include "main/teximage.h"

+#include "main/texparam.h"

+#include "main/texstate.h"

+#include "main/varray.h"

+#include "main/viewport.h"

+#include "program/program.h"

+#include "swrast/swrast.h"

+#include "drivers/common/meta.h"

+

+

+/** Return offset in bytes of the field within a vertex struct */

+#define OFFSET(FIELD) ((void *) offsetof(struct vertex, FIELD))

+

+

+/**

+ * Flags passed to _mesa_meta_begin().

+ */

+/*@{*/

+#define META_ALL              ~0x0

+#define META_ALPHA_TEST        0x1

+#define META_BLEND             0x2  /**< includes logicop */

+#define META_COLOR_MASK        0x4

+#define META_DEPTH_TEST        0x8

+#define META_FOG              0x10

+#define META_PIXEL_STORE      0x20

+#define META_PIXEL_TRANSFER   0x40

+#define META_RASTERIZATION    0x80

+#define META_SCISSOR         0x100

+#define META_SHADER          0x200

+#define META_STENCIL_TEST    0x400

+#define META_TRANSFORM       0x800 /**< modelview, projection, clip planes */

+#define META_TEXTURE        0x1000

+#define META_VERTEX         0x2000

+#define META_VIEWPORT       0x4000

+#define META_CLAMP_FRAGMENT_COLOR 0x8000

+#define META_CLAMP_VERTEX_COLOR 0x10000

+#define META_CONDITIONAL_RENDER 0x20000

+/*@}*/

+

+

+/**

+ * State which we may save/restore across meta ops.

+ * XXX this may be incomplete...

+ */

+struct save_state

+{

+   GLbitfield SavedState;  /**< bitmask of META_* flags */

+

+   /** META_ALPHA_TEST */

+   GLboolean AlphaEnabled;

+   GLenum AlphaFunc;

+   GLclampf AlphaRef;

+

+   /** META_BLEND */

+   GLbitfield BlendEnabled;

+   GLboolean ColorLogicOpEnabled;

+

+   /** META_COLOR_MASK */

+   GLubyte ColorMask[MAX_DRAW_BUFFERS][4];

+

+   /** META_DEPTH_TEST */

+   struct gl_depthbuffer_attrib Depth;

+

+   /** META_FOG */

+   GLboolean Fog;

+

+   /** META_PIXEL_STORE */

+   struct gl_pixelstore_attrib Pack, Unpack;

+

+   /** META_PIXEL_TRANSFER */

+   GLfloat RedBias, RedScale;

+   GLfloat GreenBias, GreenScale;

+   GLfloat BlueBias, BlueScale;

+   GLfloat AlphaBias, AlphaScale;

+   GLfloat DepthBias, DepthScale;

+   GLboolean MapColorFlag;

+

+   /** META_RASTERIZATION */

+   GLenum FrontPolygonMode, BackPolygonMode;

+   GLboolean PolygonOffset;

+   GLboolean PolygonSmooth;

+   GLboolean PolygonStipple;

+   GLboolean PolygonCull;

+

+   /** META_SCISSOR */

+   struct gl_scissor_attrib Scissor;

+

+   /** META_SHADER */

+   GLboolean VertexProgramEnabled;

+   struct gl_vertex_program *VertexProgram;

+   GLboolean FragmentProgramEnabled;

+   struct gl_fragment_program *FragmentProgram;

+   struct gl_shader_program *VertexShader;

+   struct gl_shader_program *GeometryShader;

+   struct gl_shader_program *FragmentShader;

+   struct gl_shader_program *ActiveShader;

+

+   /** META_STENCIL_TEST */

+   struct gl_stencil_attrib Stencil;

+

+   /** META_TRANSFORM */

+   GLenum MatrixMode;

+   GLfloat ModelviewMatrix[16];

+   GLfloat ProjectionMatrix[16];

+   GLfloat TextureMatrix[16];

+   GLbitfield ClipPlanesEnabled;

+

+   /** META_TEXTURE */

+   GLuint ActiveUnit;

+   GLuint ClientActiveUnit;

+   /** for unit[0] only */

+   struct gl_texture_object *CurrentTexture[NUM_TEXTURE_TARGETS];

+   /** mask of TEXTURE_2D_BIT, etc */

+   GLbitfield TexEnabled[MAX_TEXTURE_UNITS];

+   GLbitfield TexGenEnabled[MAX_TEXTURE_UNITS];

+   GLuint EnvMode;  /* unit[0] only */

+

+   /** META_VERTEX */

+   struct gl_array_object *ArrayObj;

+   struct gl_buffer_object *ArrayBufferObj;

+

+   /** META_VIEWPORT */

+   GLint ViewportX, ViewportY, ViewportW, ViewportH;

+   GLclampd DepthNear, DepthFar;

+

+   /** META_CLAMP_FRAGMENT_COLOR */

+   GLenum ClampFragmentColor;

+

+   /** META_CLAMP_VERTEX_COLOR */

+   GLenum ClampVertexColor;

+

+   /** META_CONDITIONAL_RENDER */

+   struct gl_query_object *CondRenderQuery;

+   GLenum CondRenderMode;

+

+   /** Miscellaneous (always disabled) */

+   GLboolean Lighting;

+};

+

+

+/**

+ * Temporary texture used for glBlitFramebuffer, glDrawPixels, etc.

+ * This is currently shared by all the meta ops.  But we could create a

+ * separate one for each of glDrawPixel, glBlitFramebuffer, glCopyPixels, etc.

+ */

+struct temp_texture

+{

+   GLuint TexObj;

+   GLenum Target;         /**< GL_TEXTURE_2D or GL_TEXTURE_RECTANGLE */

+   GLsizei MinSize;       /**< Min texture size to allocate */

+   GLsizei MaxSize;       /**< Max possible texture size */

+   GLboolean NPOT;        /**< Non-power of two size OK? */

+   GLsizei Width, Height; /**< Current texture size */

+   GLenum IntFormat;

+   GLfloat Sright, Ttop;  /**< right, top texcoords */

+};

+

+

+/**

+ * State for glBlitFramebufer()

+ */

+struct blit_state

+{

+   GLuint ArrayObj;

+   GLuint VBO;

+   GLuint DepthFP;

+};

+

+

+/**

+ * State for glClear()

+ */

+struct clear_state

+{

+   GLuint ArrayObj;

+   GLuint VBO;

+};

+

+

+/**

+ * State for glCopyPixels()

+ */

+struct copypix_state

+{

+   GLuint ArrayObj;

+   GLuint VBO;

+};

+

+

+/**

+ * State for glDrawPixels()

+ */

+struct drawpix_state

+{

+   GLuint ArrayObj;

+

+   GLuint StencilFP;  /**< Fragment program for drawing stencil images */

+   GLuint DepthFP;  /**< Fragment program for drawing depth images */

+};

+

+

+/**

+ * State for glBitmap()

+ */

+struct bitmap_state

+{

+   GLuint ArrayObj;

+   GLuint VBO;

+   struct temp_texture Tex;  /**< separate texture from other meta ops */

+};

+

+

+/**

+ * State for _mesa_meta_generate_mipmap()

+ */

+struct gen_mipmap_state

+{

+   GLuint ArrayObj;

+   GLuint VBO;

+   GLuint FBO;

+};

+

+#define MAX_META_OPS_DEPTH      2

+/**

+ * All per-context meta state.

+ */

+struct gl_meta_state

+{

+   /** Stack of state saved during meta-ops */

+   struct save_state Save[MAX_META_OPS_DEPTH];

+   /** Save stack depth */

+   GLuint SaveStackDepth;

+

+   struct temp_texture TempTex;

+

+   struct blit_state Blit;    /**< For _mesa_meta_BlitFramebuffer() */

+   struct clear_state Clear;  /**< For _mesa_meta_Clear() */

+   struct copypix_state CopyPix;  /**< For _mesa_meta_CopyPixels() */

+   struct drawpix_state DrawPix;  /**< For _mesa_meta_DrawPixels() */

+   struct bitmap_state Bitmap;    /**< For _mesa_meta_Bitmap() */

+   struct gen_mipmap_state Mipmap;    /**< For _mesa_meta_GenerateMipmap() */

+};

+

+

+/**

+ * Initialize meta-ops for a context.

+ * To be called once during context creation.

+ */

+void

+_mesa_meta_init(struct gl_context *ctx)

+{

+   ASSERT(!ctx->Meta);

+

+   ctx->Meta = CALLOC_STRUCT(gl_meta_state);

+}

+

+

+/**

+ * Free context meta-op state.

+ * To be called once during context destruction.

+ */

+void

+_mesa_meta_free(struct gl_context *ctx)

+{

+   /* Note: Any textures, VBOs, etc, that we allocate should get

+    * freed by the normal context destruction code.  But this would be

+    * the place to free other meta data someday.

+    */

+   free(ctx->Meta);

+   ctx->Meta = NULL;

+}

+

+

+/**

+ * Enter meta state.  This is like a light-weight version of glPushAttrib

+ * but it also resets most GL state back to default values.

+ *

+ * \param state  bitmask of META_* flags indicating which attribute groups

+ *               to save and reset to their defaults

+ */

+static void

+_mesa_meta_begin(struct gl_context *ctx, GLbitfield state)

+{

+   struct save_state *save;

+

+   /* hope MAX_META_OPS_DEPTH is large enough */

+   assert(ctx->Meta->SaveStackDepth < MAX_META_OPS_DEPTH);

+

+   save = &ctx->Meta->Save[ctx->Meta->SaveStackDepth++];

+   memset(save, 0, sizeof(*save));

+   save->SavedState = state;

+

+   if (state & META_ALPHA_TEST) {

+      save->AlphaEnabled = ctx->Color.AlphaEnabled;

+      save->AlphaFunc = ctx->Color.AlphaFunc;

+      save->AlphaRef = ctx->Color.AlphaRef;

+      if (ctx->Color.AlphaEnabled)

+         _mesa_set_enable(ctx, GL_ALPHA_TEST, GL_FALSE);

+   }

+

+   if (state & META_BLEND) {

+      save->BlendEnabled = ctx->Color.BlendEnabled;

+      if (ctx->Color.BlendEnabled) {

+         if (ctx->Extensions.EXT_draw_buffers2) {

+            GLuint i;

+            for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {

+               _mesa_set_enablei(ctx, GL_BLEND, i, GL_FALSE);

+            }

+         }

+         else {

+            _mesa_set_enable(ctx, GL_BLEND, GL_FALSE);

+         }

+      }

+      save->ColorLogicOpEnabled = ctx->Color.ColorLogicOpEnabled;

+      if (ctx->Color.ColorLogicOpEnabled)

+         _mesa_set_enable(ctx, GL_COLOR_LOGIC_OP, GL_FALSE);

+   }

+

+   if (state & META_COLOR_MASK) {

+      memcpy(save->ColorMask, ctx->Color.ColorMask,

+             sizeof(ctx->Color.ColorMask));

+      if (!ctx->Color.ColorMask[0][0] ||

+          !ctx->Color.ColorMask[0][1] ||

+          !ctx->Color.ColorMask[0][2] ||

+          !ctx->Color.ColorMask[0][3])

+         _mesa_ColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);

+   }

+

+   if (state & META_DEPTH_TEST) {

+      save->Depth = ctx->Depth; /* struct copy */

+      if (ctx->Depth.Test)

+         _mesa_set_enable(ctx, GL_DEPTH_TEST, GL_FALSE);

+   }

+

+   if (state & META_FOG) {

+      save->Fog = ctx->Fog.Enabled;

+      if (ctx->Fog.Enabled)

+         _mesa_set_enable(ctx, GL_FOG, GL_FALSE);

+   }

+

+   if (state & META_PIXEL_STORE) {

+      save->Pack = ctx->Pack;

+      save->Unpack = ctx->Unpack;

+      ctx->Pack = ctx->DefaultPacking;

+      ctx->Unpack = ctx->DefaultPacking;

+   }

+

+   if (state & META_PIXEL_TRANSFER) {

+      save->RedScale = ctx->Pixel.RedScale;

+      save->RedBias = ctx->Pixel.RedBias;

+      save->GreenScale = ctx->Pixel.GreenScale;

+      save->GreenBias = ctx->Pixel.GreenBias;

+      save->BlueScale = ctx->Pixel.BlueScale;

+      save->BlueBias = ctx->Pixel.BlueBias;

+      save->AlphaScale = ctx->Pixel.AlphaScale;

+      save->AlphaBias = ctx->Pixel.AlphaBias;

+      save->MapColorFlag = ctx->Pixel.MapColorFlag;

+      ctx->Pixel.RedScale = 1.0F;

+      ctx->Pixel.RedBias = 0.0F;

+      ctx->Pixel.GreenScale = 1.0F;

+      ctx->Pixel.GreenBias = 0.0F;

+      ctx->Pixel.BlueScale = 1.0F;

+      ctx->Pixel.BlueBias = 0.0F;

+      ctx->Pixel.AlphaScale = 1.0F;

+      ctx->Pixel.AlphaBias = 0.0F;

+      ctx->Pixel.MapColorFlag = GL_FALSE;

+      /* XXX more state */

+      ctx->NewState |=_NEW_PIXEL;

+   }

+

+   if (state & META_RASTERIZATION) {

+      save->FrontPolygonMode = ctx->Polygon.FrontMode;

+      save->BackPolygonMode = ctx->Polygon.BackMode;

+      save->PolygonOffset = ctx->Polygon.OffsetFill;

+      save->PolygonSmooth = ctx->Polygon.SmoothFlag;

+      save->PolygonStipple = ctx->Polygon.StippleFlag;

+      save->PolygonCull = ctx->Polygon.CullFlag;

+      _mesa_PolygonMode(GL_FRONT_AND_BACK, GL_FILL);

+      _mesa_set_enable(ctx, GL_POLYGON_OFFSET_FILL, GL_FALSE);

+      _mesa_set_enable(ctx, GL_POLYGON_SMOOTH, GL_FALSE);

+      _mesa_set_enable(ctx, GL_POLYGON_STIPPLE, GL_FALSE);

+      _mesa_set_enable(ctx, GL_CULL_FACE, GL_FALSE);

+   }

+

+   if (state & META_SCISSOR) {

+      save->Scissor = ctx->Scissor; /* struct copy */

+      _mesa_set_enable(ctx, GL_SCISSOR_TEST, GL_FALSE);

+   }

+

+   if (state & META_SHADER) {

+      if (ctx->Extensions.ARB_vertex_program) {

+         save->VertexProgramEnabled = ctx->VertexProgram.Enabled;

+         _mesa_reference_vertprog(ctx, &save->VertexProgram,

+				  ctx->VertexProgram.Current);

+         _mesa_set_enable(ctx, GL_VERTEX_PROGRAM_ARB, GL_FALSE);

+      }

+

+      if (ctx->Extensions.ARB_fragment_program) {

+         save->FragmentProgramEnabled = ctx->FragmentProgram.Enabled;

+         _mesa_reference_fragprog(ctx, &save->FragmentProgram,

+				  ctx->FragmentProgram.Current);

+         _mesa_set_enable(ctx, GL_FRAGMENT_PROGRAM_ARB, GL_FALSE);

+      }

+

+      if (ctx->Extensions.ARB_shader_objects) {

+	 _mesa_reference_shader_program(ctx, &save->VertexShader,

+					ctx->Shader.CurrentVertexProgram);

+	 _mesa_reference_shader_program(ctx, &save->GeometryShader,

+					ctx->Shader.CurrentGeometryProgram);

+	 _mesa_reference_shader_program(ctx, &save->FragmentShader,

+					ctx->Shader.CurrentFragmentProgram);

+	 _mesa_reference_shader_program(ctx, &save->ActiveShader,

+					ctx->Shader.CurrentFragmentProgram);

+

+         _mesa_UseProgramObjectARB(0);

+      }

+   }

+

+   if (state & META_STENCIL_TEST) {

+      save->Stencil = ctx->Stencil; /* struct copy */

+      if (ctx->Stencil.Enabled)

+         _mesa_set_enable(ctx, GL_STENCIL_TEST, GL_FALSE);

+      /* NOTE: other stencil state not reset */

+   }

+

+   if (state & META_TEXTURE) {

+      GLuint u, tgt;

+

+      save->ActiveUnit = ctx->Texture.CurrentUnit;

+      save->ClientActiveUnit = ctx->Array.ActiveTexture;

+      save->EnvMode = ctx->Texture.Unit[0].EnvMode;

+

+      /* Disable all texture units */

+      for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {

+         save->TexEnabled[u] = ctx->Texture.Unit[u].Enabled;

+         save->TexGenEnabled[u] = ctx->Texture.Unit[u].TexGenEnabled;

+         if (ctx->Texture.Unit[u].Enabled ||

+             ctx->Texture.Unit[u].TexGenEnabled) {

+            _mesa_ActiveTextureARB(GL_TEXTURE0 + u);

+            _mesa_set_enable(ctx, GL_TEXTURE_1D, GL_FALSE);

+            _mesa_set_enable(ctx, GL_TEXTURE_2D, GL_FALSE);

+            _mesa_set_enable(ctx, GL_TEXTURE_3D, GL_FALSE);

+            if (ctx->Extensions.ARB_texture_cube_map)

+               _mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP, GL_FALSE);

+            _mesa_set_enable(ctx, GL_TEXTURE_RECTANGLE, GL_FALSE);

+            _mesa_set_enable(ctx, GL_TEXTURE_GEN_S, GL_FALSE);

+            _mesa_set_enable(ctx, GL_TEXTURE_GEN_T, GL_FALSE);

+            _mesa_set_enable(ctx, GL_TEXTURE_GEN_R, GL_FALSE);

+            _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q, GL_FALSE);

+         }

+      }

+

+      /* save current texture objects for unit[0] only */

+      for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {

+         _mesa_reference_texobj(&save->CurrentTexture[tgt],

+                                ctx->Texture.Unit[0].CurrentTex[tgt]);

+      }

+

+      /* set defaults for unit[0] */

+      _mesa_ActiveTextureARB(GL_TEXTURE0);

+      _mesa_ClientActiveTextureARB(GL_TEXTURE0);

+      _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);

+   }

+

+   if (state & META_TRANSFORM) {

+      GLuint activeTexture = ctx->Texture.CurrentUnit;

+      memcpy(save->ModelviewMatrix, ctx->ModelviewMatrixStack.Top->m,

+             16 * sizeof(GLfloat));

+      memcpy(save->ProjectionMatrix, ctx->ProjectionMatrixStack.Top->m,

+             16 * sizeof(GLfloat));

+      memcpy(save->TextureMatrix, ctx->TextureMatrixStack[0].Top->m,

+             16 * sizeof(GLfloat));

+      save->MatrixMode = ctx->Transform.MatrixMode;

+      /* set 1:1 vertex:pixel coordinate transform */

+      _mesa_ActiveTextureARB(GL_TEXTURE0);

+      _mesa_MatrixMode(GL_TEXTURE);

+      _mesa_LoadIdentity();

+      _mesa_ActiveTextureARB(GL_TEXTURE0 + activeTexture);

+      _mesa_MatrixMode(GL_MODELVIEW);

+      _mesa_LoadIdentity();

+      _mesa_MatrixMode(GL_PROJECTION);

+      _mesa_LoadIdentity();

+      _mesa_Ortho(0.0, ctx->DrawBuffer->Width,

+                  0.0, ctx->DrawBuffer->Height,

+                  -1.0, 1.0);

+      save->ClipPlanesEnabled = ctx->Transform.ClipPlanesEnabled;

+      if (ctx->Transform.ClipPlanesEnabled) {

+         GLuint i;

+         for (i = 0; i < ctx->Const.MaxClipPlanes; i++) {

+            _mesa_set_enable(ctx, GL_CLIP_PLANE0 + i, GL_FALSE);

+         }

+      }

+   }

+

+   if (state & META_VERTEX) {

+      /* save vertex array object state */

+      _mesa_reference_array_object(ctx, &save->ArrayObj,

+                                   ctx->Array.ArrayObj);

+      _mesa_reference_buffer_object(ctx, &save->ArrayBufferObj,

+                                    ctx->Array.ArrayBufferObj);

+      /* set some default state? */

+   }

+

+   if (state & META_VIEWPORT) {

+      /* save viewport state */

+      save->ViewportX = ctx->Viewport.X;

+      save->ViewportY = ctx->Viewport.Y;

+      save->ViewportW = ctx->Viewport.Width;

+      save->ViewportH = ctx->Viewport.Height;

+      /* set viewport to match window size */

+      if (ctx->Viewport.X != 0 ||

+          ctx->Viewport.Y != 0 ||

+          ctx->Viewport.Width != ctx->DrawBuffer->Width ||

+          ctx->Viewport.Height != ctx->DrawBuffer->Height) {

+         _mesa_set_viewport(ctx, 0, 0,

+                            ctx->DrawBuffer->Width, ctx->DrawBuffer->Height);

+      }

+      /* save depth range state */

+      save->DepthNear = ctx->Viewport.Near;

+      save->DepthFar = ctx->Viewport.Far;

+      /* set depth range to default */

+      _mesa_DepthRange(0.0, 1.0);

+   }

+

+   if (state & META_CLAMP_FRAGMENT_COLOR) {

+      save->ClampFragmentColor = ctx->Color.ClampFragmentColor;

+

+      /* Generally in here we want to do clamping according to whether

+       * it's for the pixel path (ClampFragmentColor is GL_TRUE),

+       * regardless of the internal implementation of the metaops.

+       */

+      if (ctx->Color.ClampFragmentColor != GL_TRUE)

+	 _mesa_ClampColorARB(GL_CLAMP_FRAGMENT_COLOR, GL_FALSE);

+   }

+

+   if (state & META_CLAMP_VERTEX_COLOR) {

+      save->ClampVertexColor = ctx->Light.ClampVertexColor;

+

+      /* Generally in here we never want vertex color clamping --

+       * result clamping is only dependent on fragment clamping.

+       */

+      _mesa_ClampColorARB(GL_CLAMP_VERTEX_COLOR, GL_FALSE);

+   }

+

+   if (state & META_CONDITIONAL_RENDER) {

+      save->CondRenderQuery = ctx->Query.CondRenderQuery;

+      save->CondRenderMode = ctx->Query.CondRenderMode;

+

+      if (ctx->Query.CondRenderQuery)

+	 _mesa_EndConditionalRender();

+   }

+

+   /* misc */

+   {

+      save->Lighting = ctx->Light.Enabled;

+      if (ctx->Light.Enabled)

+         _mesa_set_enable(ctx, GL_LIGHTING, GL_FALSE);

+   }

+}

+

+

+/**

+ * Leave meta state.  This is like a light-weight version of glPopAttrib().

+ */

+static void

+_mesa_meta_end(struct gl_context *ctx)

+{

+   struct save_state *save = &ctx->Meta->Save[--ctx->Meta->SaveStackDepth];

+   const GLbitfield state = save->SavedState;

+

+   if (state & META_ALPHA_TEST) {

+      if (ctx->Color.AlphaEnabled != save->AlphaEnabled)

+         _mesa_set_enable(ctx, GL_ALPHA_TEST, save->AlphaEnabled);

+      _mesa_AlphaFunc(save->AlphaFunc, save->AlphaRef);

+   }

+

+   if (state & META_BLEND) {

+      if (ctx->Color.BlendEnabled != save->BlendEnabled) {

+         if (ctx->Extensions.EXT_draw_buffers2) {

+            GLuint i;

+            for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {

+               _mesa_set_enablei(ctx, GL_BLEND, i, (save->BlendEnabled >> i) & 1);

+            }

+         }

+         else {

+            _mesa_set_enable(ctx, GL_BLEND, (save->BlendEnabled & 1));

+         }

+      }

+      if (ctx->Color.ColorLogicOpEnabled != save->ColorLogicOpEnabled)

+         _mesa_set_enable(ctx, GL_COLOR_LOGIC_OP, save->ColorLogicOpEnabled);

+   }

+

+   if (state & META_COLOR_MASK) {

+      GLuint i;

+      for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {

+         if (!TEST_EQ_4V(ctx->Color.ColorMask[i], save->ColorMask[i])) {

+            if (i == 0) {

+               _mesa_ColorMask(save->ColorMask[i][0], save->ColorMask[i][1],

+                               save->ColorMask[i][2], save->ColorMask[i][3]);

+            }

+            else {

+               _mesa_ColorMaskIndexed(i,

+                                      save->ColorMask[i][0],

+                                      save->ColorMask[i][1],

+                                      save->ColorMask[i][2],

+                                      save->ColorMask[i][3]);

+            }

+         }

+      }

+   }

+

+   if (state & META_DEPTH_TEST) {

+      if (ctx->Depth.Test != save->Depth.Test)

+         _mesa_set_enable(ctx, GL_DEPTH_TEST, save->Depth.Test);

+      _mesa_DepthFunc(save->Depth.Func);

+      _mesa_DepthMask(save->Depth.Mask);

+   }

+

+   if (state & META_FOG) {

+      _mesa_set_enable(ctx, GL_FOG, save->Fog);

+   }

+

+   if (state & META_PIXEL_STORE) {

+      ctx->Pack = save->Pack;

+      ctx->Unpack = save->Unpack;

+   }

+

+   if (state & META_PIXEL_TRANSFER) {

+      ctx->Pixel.RedScale = save->RedScale;

+      ctx->Pixel.RedBias = save->RedBias;

+      ctx->Pixel.GreenScale = save->GreenScale;

+      ctx->Pixel.GreenBias = save->GreenBias;

+      ctx->Pixel.BlueScale = save->BlueScale;

+      ctx->Pixel.BlueBias = save->BlueBias;

+      ctx->Pixel.AlphaScale = save->AlphaScale;

+      ctx->Pixel.AlphaBias = save->AlphaBias;

+      ctx->Pixel.MapColorFlag = save->MapColorFlag;

+      /* XXX more state */

+      ctx->NewState |=_NEW_PIXEL;

+   }

+

+   if (state & META_RASTERIZATION) {

+      _mesa_PolygonMode(GL_FRONT, save->FrontPolygonMode);

+      _mesa_PolygonMode(GL_BACK, save->BackPolygonMode);

+      _mesa_set_enable(ctx, GL_POLYGON_STIPPLE, save->PolygonStipple);

+      _mesa_set_enable(ctx, GL_POLYGON_OFFSET_FILL, save->PolygonOffset);

+      _mesa_set_enable(ctx, GL_POLYGON_SMOOTH, save->PolygonSmooth);

+      _mesa_set_enable(ctx, GL_CULL_FACE, save->PolygonCull);

+   }

+

+   if (state & META_SCISSOR) {

+      _mesa_set_enable(ctx, GL_SCISSOR_TEST, save->Scissor.Enabled);

+      _mesa_Scissor(save->Scissor.X, save->Scissor.Y,

+                    save->Scissor.Width, save->Scissor.Height);

+   }

+

+   if (state & META_SHADER) {

+      if (ctx->Extensions.ARB_vertex_program) {

+         _mesa_set_enable(ctx, GL_VERTEX_PROGRAM_ARB,

+                          save->VertexProgramEnabled);

+         _mesa_reference_vertprog(ctx, &ctx->VertexProgram.Current, 

+                                  save->VertexProgram);

+	 _mesa_reference_vertprog(ctx, &save->VertexProgram, NULL);

+      }

+

+      if (ctx->Extensions.ARB_fragment_program) {

+         _mesa_set_enable(ctx, GL_FRAGMENT_PROGRAM_ARB,

+                          save->FragmentProgramEnabled);

+         _mesa_reference_fragprog(ctx, &ctx->FragmentProgram.Current,

+                                  save->FragmentProgram);

+	 _mesa_reference_fragprog(ctx, &save->FragmentProgram, NULL);

+      }

+

+      if (ctx->Extensions.ARB_vertex_shader)

+	 _mesa_use_shader_program(ctx, GL_VERTEX_SHADER, save->VertexShader);

+

+      if (ctx->Extensions.ARB_geometry_shader4)

+	 _mesa_use_shader_program(ctx, GL_GEOMETRY_SHADER_ARB,

+				  save->GeometryShader);

+

+      if (ctx->Extensions.ARB_fragment_shader)

+	 _mesa_use_shader_program(ctx, GL_FRAGMENT_SHADER,

+				  save->FragmentShader);

+

+      _mesa_reference_shader_program(ctx, &ctx->Shader.ActiveProgram,

+				     save->ActiveShader);

+   }

+

+   if (state & META_STENCIL_TEST) {

+      const struct gl_stencil_attrib *stencil = &save->Stencil;

+

+      _mesa_set_enable(ctx, GL_STENCIL_TEST, stencil->Enabled);

+      _mesa_ClearStencil(stencil->Clear);

+      if (ctx->Extensions.EXT_stencil_two_side) {

+         _mesa_set_enable(ctx, GL_STENCIL_TEST_TWO_SIDE_EXT,

+                          stencil->TestTwoSide);

+         _mesa_ActiveStencilFaceEXT(stencil->ActiveFace

+                                    ? GL_BACK : GL_FRONT);

+      }

+      /* front state */

+      _mesa_StencilFuncSeparate(GL_FRONT,

+                                stencil->Function[0],

+                                stencil->Ref[0],

+                                stencil->ValueMask[0]);

+      _mesa_StencilMaskSeparate(GL_FRONT, stencil->WriteMask[0]);

+      _mesa_StencilOpSeparate(GL_FRONT, stencil->FailFunc[0],

+                              stencil->ZFailFunc[0],

+                              stencil->ZPassFunc[0]);

+      /* back state */

+      _mesa_StencilFuncSeparate(GL_BACK,

+                                stencil->Function[1],

+                                stencil->Ref[1],

+                                stencil->ValueMask[1]);

+      _mesa_StencilMaskSeparate(GL_BACK, stencil->WriteMask[1]);

+      _mesa_StencilOpSeparate(GL_BACK, stencil->FailFunc[1],

+                              stencil->ZFailFunc[1],

+                              stencil->ZPassFunc[1]);

+   }

+

+   if (state & META_TEXTURE) {

+      GLuint u, tgt;

+

+      ASSERT(ctx->Texture.CurrentUnit == 0);

+

+      /* restore texenv for unit[0] */

+      _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, save->EnvMode);

+

+      /* restore texture objects for unit[0] only */

+      for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {

+         _mesa_reference_texobj(&ctx->Texture.Unit[0].CurrentTex[tgt],

+                                save->CurrentTexture[tgt]);

+         _mesa_reference_texobj(&save->CurrentTexture[tgt], NULL);

+      }

+

+      /* Re-enable textures, texgen */

+      for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {

+         if (save->TexEnabled[u]) {

+            _mesa_ActiveTextureARB(GL_TEXTURE0 + u);

+

+            if (save->TexEnabled[u] & TEXTURE_1D_BIT)

+               _mesa_set_enable(ctx, GL_TEXTURE_1D, GL_TRUE);

+            if (save->TexEnabled[u] & TEXTURE_2D_BIT)

+               _mesa_set_enable(ctx, GL_TEXTURE_2D, GL_TRUE);

+            if (save->TexEnabled[u] & TEXTURE_3D_BIT)

+               _mesa_set_enable(ctx, GL_TEXTURE_3D, GL_TRUE);

+            if (save->TexEnabled[u] & TEXTURE_CUBE_BIT)

+               _mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP, GL_TRUE);

+            if (save->TexEnabled[u] & TEXTURE_RECT_BIT)

+               _mesa_set_enable(ctx, GL_TEXTURE_RECTANGLE, GL_TRUE);

+         }

+

+         if (save->TexGenEnabled[u]) {

+            _mesa_ActiveTextureARB(GL_TEXTURE0 + u);

+

+            if (save->TexGenEnabled[u] & S_BIT)

+               _mesa_set_enable(ctx, GL_TEXTURE_GEN_S, GL_TRUE);

+            if (save->TexGenEnabled[u] & T_BIT)

+               _mesa_set_enable(ctx, GL_TEXTURE_GEN_T, GL_TRUE);

+            if (save->TexGenEnabled[u] & R_BIT)

+               _mesa_set_enable(ctx, GL_TEXTURE_GEN_R, GL_TRUE);

+            if (save->TexGenEnabled[u] & Q_BIT)

+               _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q, GL_TRUE);

+         }

+      }

+

+      /* restore current unit state */

+      _mesa_ActiveTextureARB(GL_TEXTURE0 + save->ActiveUnit);

+      _mesa_ClientActiveTextureARB(GL_TEXTURE0 + save->ClientActiveUnit);

+   }

+

+   if (state & META_TRANSFORM) {

+      GLuint activeTexture = ctx->Texture.CurrentUnit;

+      _mesa_ActiveTextureARB(GL_TEXTURE0);

+      _mesa_MatrixMode(GL_TEXTURE);

+      _mesa_LoadMatrixf(save->TextureMatrix);

+      _mesa_ActiveTextureARB(GL_TEXTURE0 + activeTexture);

+

+      _mesa_MatrixMode(GL_MODELVIEW);

+      _mesa_LoadMatrixf(save->ModelviewMatrix);

+

+      _mesa_MatrixMode(GL_PROJECTION);

+      _mesa_LoadMatrixf(save->ProjectionMatrix);

+

+      _mesa_MatrixMode(save->MatrixMode);

+

+      if (save->ClipPlanesEnabled) {

+         GLuint i;

+         for (i = 0; i < ctx->Const.MaxClipPlanes; i++) {

+            if (save->ClipPlanesEnabled & (1 << i)) {

+               _mesa_set_enable(ctx, GL_CLIP_PLANE0 + i, GL_TRUE);

+            }

+         }

+      }

+   }

+

+   if (state & META_VERTEX) {

+      /* restore vertex buffer object */

+      _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, save->ArrayBufferObj->Name);

+      _mesa_reference_buffer_object(ctx, &save->ArrayBufferObj, NULL);

+

+      /* restore vertex array object */

+      _mesa_BindVertexArray(save->ArrayObj->Name);

+      _mesa_reference_array_object(ctx, &save->ArrayObj, NULL);

+   }

+

+   if (state & META_VIEWPORT) {

+      if (save->ViewportX != ctx->Viewport.X ||

+          save->ViewportY != ctx->Viewport.Y ||

+          save->ViewportW != ctx->Viewport.Width ||

+          save->ViewportH != ctx->Viewport.Height) {

+         _mesa_set_viewport(ctx, save->ViewportX, save->ViewportY,

+                            save->ViewportW, save->ViewportH);

+      }

+      _mesa_DepthRange(save->DepthNear, save->DepthFar);

+   }

+

+   if (state & META_CLAMP_FRAGMENT_COLOR) {

+      _mesa_ClampColorARB(GL_CLAMP_FRAGMENT_COLOR, save->ClampFragmentColor);

+   }

+

+   if (state & META_CLAMP_VERTEX_COLOR) {

+      _mesa_ClampColorARB(GL_CLAMP_VERTEX_COLOR, save->ClampVertexColor);

+   }

+

+   if (state & META_CONDITIONAL_RENDER) {

+      if (save->CondRenderQuery)

+	 _mesa_BeginConditionalRender(save->CondRenderQuery->Id,

+				      save->CondRenderMode);

+   }

+

+   /* misc */

+   if (save->Lighting) {

+      _mesa_set_enable(ctx, GL_LIGHTING, GL_TRUE);

+   }

+}

+

+

+/**

+ * Convert Z from a normalized value in the range [0, 1] to an object-space

+ * Z coordinate in [-1, +1] so that drawing at the new Z position with the

+ * default/identity ortho projection results in the original Z value.

+ * Used by the meta-Clear, Draw/CopyPixels and Bitmap functions where the Z

+ * value comes from the clear value or raster position.

+ */

+static INLINE GLfloat

+invert_z(GLfloat normZ)

+{

+   GLfloat objZ = 1.0 - 2.0 * normZ;

+   return objZ;

+}

+

+

+/**

+ * One-time init for a temp_texture object.

+ * Choose tex target, compute max tex size, etc.

+ */

+static void

+init_temp_texture(struct gl_context *ctx, struct temp_texture *tex)

+{

+   /* prefer texture rectangle */

+   if (ctx->Extensions.NV_texture_rectangle) {

+      tex->Target = GL_TEXTURE_RECTANGLE;

+      tex->MaxSize = ctx->Const.MaxTextureRectSize;

+      tex->NPOT = GL_TRUE;

+   }

+   else {

+      /* use 2D texture, NPOT if possible */

+      tex->Target = GL_TEXTURE_2D;

+      tex->MaxSize = 1 << (ctx->Const.MaxTextureLevels - 1);

+      tex->NPOT = ctx->Extensions.ARB_texture_non_power_of_two;

+   }

+   tex->MinSize = 16;  /* 16 x 16 at least */

+   assert(tex->MaxSize > 0);

+

+   _mesa_GenTextures(1, &tex->TexObj);

+}

+

+

+/**

+ * Return pointer to temp_texture info for non-bitmap ops.

+ * This does some one-time init if needed.

+ */

+static struct temp_texture *

+get_temp_texture(struct gl_context *ctx)

+{

+   struct temp_texture *tex = &ctx->Meta->TempTex;

+

+   if (!tex->TexObj) {

+      init_temp_texture(ctx, tex);

+   }

+

+   return tex;

+}

+

+

+/**

+ * Return pointer to temp_texture info for _mesa_meta_bitmap().

+ * We use a separate texture for bitmaps to reduce texture

+ * allocation/deallocation.

+ */

+static struct temp_texture *

+get_bitmap_temp_texture(struct gl_context *ctx)

+{

+   struct temp_texture *tex = &ctx->Meta->Bitmap.Tex;

+

+   if (!tex->TexObj) {

+      init_temp_texture(ctx, tex);

+   }

+

+   return tex;

+}

+

+

+/**

+ * Compute the width/height of texture needed to draw an image of the

+ * given size.  Return a flag indicating whether the current texture

+ * can be re-used (glTexSubImage2D) or if a new texture needs to be

+ * allocated (glTexImage2D).

+ * Also, compute s/t texcoords for drawing.

+ *

+ * \return GL_TRUE if new texture is needed, GL_FALSE otherwise

+ */

+static GLboolean

+alloc_texture(struct temp_texture *tex,

+              GLsizei width, GLsizei height, GLenum intFormat)

+{

+   GLboolean newTex = GL_FALSE;

+

+   ASSERT(width <= tex->MaxSize);

+   ASSERT(height <= tex->MaxSize);

+

+   if (width > tex->Width ||

+       height > tex->Height ||

+       intFormat != tex->IntFormat) {

+      /* alloc new texture (larger or different format) */

+

+      if (tex->NPOT) {

+         /* use non-power of two size */

+         tex->Width = MAX2(tex->MinSize, width);

+         tex->Height = MAX2(tex->MinSize, height);

+      }

+      else {

+         /* find power of two size */

+         GLsizei w, h;

+         w = h = tex->MinSize;

+         while (w < width)

+            w *= 2;

+         while (h < height)

+            h *= 2;

+         tex->Width = w;

+         tex->Height = h;

+      }

+

+      tex->IntFormat = intFormat;

+

+      newTex = GL_TRUE;

+   }

+

+   /* compute texcoords */

+   if (tex->Target == GL_TEXTURE_RECTANGLE) {

+      tex->Sright = (GLfloat) width;

+      tex->Ttop = (GLfloat) height;

+   }

+   else {

+      tex->Sright = (GLfloat) width / tex->Width;

+      tex->Ttop = (GLfloat) height / tex->Height;

+   }

+

+   return newTex;

+}

+

+

+/**

+ * Setup/load texture for glCopyPixels or glBlitFramebuffer.

+ */

+static void

+setup_copypix_texture(struct temp_texture *tex,

+                      GLboolean newTex,

+                      GLint srcX, GLint srcY,

+                      GLsizei width, GLsizei height, GLenum intFormat,

+                      GLenum filter)

+{

+   _mesa_BindTexture(tex->Target, tex->TexObj);

+   _mesa_TexParameteri(tex->Target, GL_TEXTURE_MIN_FILTER, filter);

+   _mesa_TexParameteri(tex->Target, GL_TEXTURE_MAG_FILTER, filter);

+   _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);

+

+   /* copy framebuffer image to texture */

+   if (newTex) {

+      /* create new tex image */

+      if (tex->Width == width && tex->Height == height) {

+         /* create new tex with framebuffer data */

+         _mesa_CopyTexImage2D(tex->Target, 0, tex->IntFormat,

+                              srcX, srcY, width, height, 0);

+      }

+      else {

+         /* create empty texture */

+         _mesa_TexImage2D(tex->Target, 0, tex->IntFormat,

+                          tex->Width, tex->Height, 0,

+                          intFormat, GL_UNSIGNED_BYTE, NULL);

+         /* load image */

+         _mesa_CopyTexSubImage2D(tex->Target, 0,

+                                 0, 0, srcX, srcY, width, height);

+      }

+   }

+   else {

+      /* replace existing tex image */

+      _mesa_CopyTexSubImage2D(tex->Target, 0,

+                              0, 0, srcX, srcY, width, height);

+   }

+}

+

+

+/**

+ * Setup/load texture for glDrawPixels.

+ */

+static void

+setup_drawpix_texture(struct gl_context *ctx,

+		      struct temp_texture *tex,

+                      GLboolean newTex,

+                      GLenum texIntFormat,

+                      GLsizei width, GLsizei height,

+                      GLenum format, GLenum type,

+                      const GLvoid *pixels)

+{

+   _mesa_BindTexture(tex->Target, tex->TexObj);

+   _mesa_TexParameteri(tex->Target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

+   _mesa_TexParameteri(tex->Target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

+   _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);

+

+   /* copy pixel data to texture */

+   if (newTex) {

+      /* create new tex image */

+      if (tex->Width == width && tex->Height == height) {

+         /* create new tex and load image data */

+         _mesa_TexImage2D(tex->Target, 0, tex->IntFormat,

+                          tex->Width, tex->Height, 0, format, type, pixels);

+      }

+      else {

+	 struct gl_buffer_object *save_unpack_obj = NULL;

+

+	 _mesa_reference_buffer_object(ctx, &save_unpack_obj,

+				       ctx->Unpack.BufferObj);

+	 _mesa_BindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, 0);

+         /* create empty texture */

+         _mesa_TexImage2D(tex->Target, 0, tex->IntFormat,

+                          tex->Width, tex->Height, 0, format, type, NULL);

+	 if (save_unpack_obj != NULL)

+	    _mesa_BindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB,

+				save_unpack_obj->Name);

+         /* load image */

+         _mesa_TexSubImage2D(tex->Target, 0,

+                             0, 0, width, height, format, type, pixels);

+      }

+   }

+   else {

+      /* replace existing tex image */

+      _mesa_TexSubImage2D(tex->Target, 0,

+                          0, 0, width, height, format, type, pixels);

+   }

+}

+

+

+

+/**

+ * One-time init for drawing depth pixels.

+ */

+static void

+init_blit_depth_pixels(struct gl_context *ctx)

+{

+   static const char *program =

+      "!!ARBfp1.0\n"

+      "TEX result.depth, fragment.texcoord[0], texture[0], %s; \n"

+      "END \n";

+   char program2[200];

+   struct blit_state *blit = &ctx->Meta->Blit;

+   struct temp_texture *tex = get_temp_texture(ctx);

+   const char *texTarget;

+

+   assert(blit->DepthFP == 0);

+

+   /* replace %s with "RECT" or "2D" */

+   assert(strlen(program) + 4 < sizeof(program2));

+   if (tex->Target == GL_TEXTURE_RECTANGLE)

+      texTarget = "RECT";

+   else

+      texTarget = "2D";

+   _mesa_snprintf(program2, sizeof(program2), program, texTarget);

+

+   _mesa_GenPrograms(1, &blit->DepthFP);

+   _mesa_BindProgram(GL_FRAGMENT_PROGRAM_ARB, blit->DepthFP);

+   _mesa_ProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,

+                          strlen(program2), (const GLubyte *) program2);

+}

+

+

+/**

+ * Try to do a glBlitFramebuffer using no-copy texturing.

+ * We can do this when the src renderbuffer is actually a texture.

+ * But if the src buffer == dst buffer we cannot do this.

+ *

+ * \return new buffer mask indicating the buffers left to blit using the

+ *         normal path.

+ */

+static GLbitfield

+blitframebuffer_texture(struct gl_context *ctx,

+                        GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,

+                        GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,

+                        GLbitfield mask, GLenum filter)

+{

+   if (mask & GL_COLOR_BUFFER_BIT) {

+      const struct gl_framebuffer *drawFb = ctx->DrawBuffer;

+      const struct gl_framebuffer *readFb = ctx->ReadBuffer;

+      const struct gl_renderbuffer_attachment *drawAtt =

+         &drawFb->Attachment[drawFb->_ColorDrawBufferIndexes[0]];

+      const struct gl_renderbuffer_attachment *readAtt =

+         &readFb->Attachment[readFb->_ColorReadBufferIndex];

+

+      if (readAtt && readAtt->Texture) {

+         const struct gl_texture_object *texObj = readAtt->Texture;

+         const GLuint srcLevel = readAtt->TextureLevel;

+         const GLenum minFilterSave = texObj->Sampler.MinFilter;

+         const GLenum magFilterSave = texObj->Sampler.MagFilter;

+         const GLint baseLevelSave = texObj->BaseLevel;

+         const GLint maxLevelSave = texObj->MaxLevel;

+         const GLenum wrapSSave = texObj->Sampler.WrapS;

+         const GLenum wrapTSave = texObj->Sampler.WrapT;

+         const GLenum target = texObj->Target;

+

+         if (drawAtt->Texture == readAtt->Texture) {

+            /* Can't use same texture as both the source and dest.  We need

+             * to handle overlapping blits and besides, some hw may not

+             * support this.

+             */

+            return mask;

+         }

+

+         if (target != GL_TEXTURE_2D && target != GL_TEXTURE_RECTANGLE_ARB) {

+            /* Can't handle other texture types at this time */

+            return mask;

+         }

+

+         /*

+         printf("Blit from texture!\n");

+         printf("  srcAtt %p  dstAtt %p\n", readAtt, drawAtt);

+         printf("  srcTex %p  dstText %p\n", texObj, drawAtt->Texture);

+         */

+

+         /* Prepare src texture state */

+         _mesa_BindTexture(target, texObj->Name);

+         _mesa_TexParameteri(target, GL_TEXTURE_MIN_FILTER, filter);

+         _mesa_TexParameteri(target, GL_TEXTURE_MAG_FILTER, filter);

+         if (target != GL_TEXTURE_RECTANGLE_ARB) {

+            _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, srcLevel);

+            _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, srcLevel);

+         }

+         _mesa_TexParameteri(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);

+         _mesa_TexParameteri(target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);

+         _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);

+         _mesa_set_enable(ctx, target, GL_TRUE);

+

+         /* Prepare vertex data (the VBO was previously created and bound) */

+         {

+            struct vertex {

+               GLfloat x, y, s, t;

+            };

+            struct vertex verts[4];

+            GLfloat s0, t0, s1, t1;

+

+            if (target == GL_TEXTURE_2D) {

+               const struct gl_texture_image *texImage

+                   = _mesa_select_tex_image(ctx, texObj, target, srcLevel);

+               s0 = srcX0 / (float) texImage->Width;

+               s1 = srcX1 / (float) texImage->Width;

+               t0 = srcY0 / (float) texImage->Height;

+               t1 = srcY1 / (float) texImage->Height;

+            }

+            else {

+               assert(target == GL_TEXTURE_RECTANGLE_ARB);

+               s0 = srcX0;

+               s1 = srcX1;

+               t0 = srcY0;

+               t1 = srcY1;

+            }

+

+            verts[0].x = (GLfloat) dstX0;

+            verts[0].y = (GLfloat) dstY0;

+            verts[1].x = (GLfloat) dstX1;

+            verts[1].y = (GLfloat) dstY0;

+            verts[2].x = (GLfloat) dstX1;

+            verts[2].y = (GLfloat) dstY1;

+            verts[3].x = (GLfloat) dstX0;

+            verts[3].y = (GLfloat) dstY1;

+

+            verts[0].s = s0;

+            verts[0].t = t0;

+            verts[1].s = s1;

+            verts[1].t = t0;

+            verts[2].s = s1;

+            verts[2].t = t1;

+            verts[3].s = s0;

+            verts[3].t = t1;

+

+            _mesa_BufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);

+         }

+

+         _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);

+

+         /* Restore texture object state, the texture binding will

+          * be restored by _mesa_meta_end().

+          */

+         _mesa_TexParameteri(target, GL_TEXTURE_MIN_FILTER, minFilterSave);

+         _mesa_TexParameteri(target, GL_TEXTURE_MAG_FILTER, magFilterSave);

+         if (target != GL_TEXTURE_RECTANGLE_ARB) {

+            _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, baseLevelSave);

+            _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, maxLevelSave);

+         }

+         _mesa_TexParameteri(target, GL_TEXTURE_WRAP_S, wrapSSave);

+         _mesa_TexParameteri(target, GL_TEXTURE_WRAP_T, wrapTSave);

+

+         /* Done with color buffer */

+         mask &= ~GL_COLOR_BUFFER_BIT;

+      }

+   }

+

+   return mask;

+}

+

+

+/**

+ * Meta implementation of ctx->Driver.BlitFramebuffer() in terms

+ * of texture mapping and polygon rendering.

+ */

+void

+_mesa_meta_BlitFramebuffer(struct gl_context *ctx,

+                           GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,

+                           GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,

+                           GLbitfield mask, GLenum filter)

+{

+   struct blit_state *blit = &ctx->Meta->Blit;

+   struct temp_texture *tex = get_temp_texture(ctx);

+   const GLsizei maxTexSize = tex->MaxSize;

+   const GLint srcX = MIN2(srcX0, srcX1);

+   const GLint srcY = MIN2(srcY0, srcY1);

+   const GLint srcW = abs(srcX1 - srcX0);

+   const GLint srcH = abs(srcY1 - srcY0);

+   const GLboolean srcFlipX = srcX1 < srcX0;

+   const GLboolean srcFlipY = srcY1 < srcY0;

+   struct vertex {

+      GLfloat x, y, s, t;

+   };

+   struct vertex verts[4];

+   GLboolean newTex;

+

+   if (srcW > maxTexSize || srcH > maxTexSize) {

+      /* XXX avoid this fallback */

+      _swrast_BlitFramebuffer(ctx, srcX0, srcY0, srcX1, srcY1,

+                              dstX0, dstY0, dstX1, dstY1, mask, filter);

+      return;

+   }

+

+   if (srcFlipX) {

+      GLint tmp = dstX0;

+      dstX0 = dstX1;

+      dstX1 = tmp;

+   }

+

+   if (srcFlipY) {

+      GLint tmp = dstY0;

+      dstY0 = dstY1;

+      dstY1 = tmp;

+   }

+

+   /* only scissor effects blit so save/clear all other relevant state */

+   _mesa_meta_begin(ctx, ~META_SCISSOR);

+

+   if (blit->ArrayObj == 0) {

+      /* one-time setup */

+

+      /* create vertex array object */

+      _mesa_GenVertexArrays(1, &blit->ArrayObj);

+      _mesa_BindVertexArray(blit->ArrayObj);

+

+      /* create vertex array buffer */

+      _mesa_GenBuffersARB(1, &blit->VBO);

+      _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, blit->VBO);

+      _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts),

+                          NULL, GL_DYNAMIC_DRAW_ARB);

+

+      /* setup vertex arrays */

+      _mesa_VertexPointer(2, GL_FLOAT, sizeof(struct vertex), OFFSET(x));

+      _mesa_TexCoordPointer(2, GL_FLOAT, sizeof(struct vertex), OFFSET(s));

+      _mesa_EnableClientState(GL_VERTEX_ARRAY);

+      _mesa_EnableClientState(GL_TEXTURE_COORD_ARRAY);

+   }

+   else {

+      _mesa_BindVertexArray(blit->ArrayObj);

+      _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, blit->VBO);

+   }

+

+   /* Try faster, direct texture approach first */

+   mask = blitframebuffer_texture(ctx, srcX0, srcY0, srcX1, srcY1,

+                                  dstX0, dstY0, dstX1, dstY1, mask, filter);

+   if (mask == 0x0) {

+      _mesa_meta_end(ctx);

+      return;

+   }

+

+   /* Continue with "normal" approach which involves copying the src rect

+    * into a temporary texture and is "blitted" by drawing a textured quad.

+    */

+

+   newTex = alloc_texture(tex, srcW, srcH, GL_RGBA);

+

+   /* vertex positions/texcoords (after texture allocation!) */

+   {

+      verts[0].x = (GLfloat) dstX0;

+      verts[0].y = (GLfloat) dstY0;

+      verts[1].x = (GLfloat) dstX1;

+      verts[1].y = (GLfloat) dstY0;

+      verts[2].x = (GLfloat) dstX1;

+      verts[2].y = (GLfloat) dstY1;

+      verts[3].x = (GLfloat) dstX0;

+      verts[3].y = (GLfloat) dstY1;

+

+      verts[0].s = 0.0F;

+      verts[0].t = 0.0F;

+      verts[1].s = tex->Sright;

+      verts[1].t = 0.0F;

+      verts[2].s = tex->Sright;

+      verts[2].t = tex->Ttop;

+      verts[3].s = 0.0F;

+      verts[3].t = tex->Ttop;

+

+      /* upload new vertex data */

+      _mesa_BufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);

+   }

+

+   _mesa_set_enable(ctx, tex->Target, GL_TRUE);

+

+   if (mask & GL_COLOR_BUFFER_BIT) {

+      setup_copypix_texture(tex, newTex, srcX, srcY, srcW, srcH,

+                            GL_RGBA, filter);

+      _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);

+      mask &= ~GL_COLOR_BUFFER_BIT;

+   }

+

+   if (mask & GL_DEPTH_BUFFER_BIT) {

+      GLuint *tmp = (GLuint *) malloc(srcW * srcH * sizeof(GLuint));

+      if (tmp) {

+         if (!blit->DepthFP)

+            init_blit_depth_pixels(ctx);

+

+         /* maybe change tex format here */

+         newTex = alloc_texture(tex, srcW, srcH, GL_DEPTH_COMPONENT);

+

+         _mesa_ReadPixels(srcX, srcY, srcW, srcH,

+                          GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, tmp);

+

+         setup_drawpix_texture(ctx, tex, newTex, GL_DEPTH_COMPONENT, srcW, srcH,

+                               GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, tmp);

+

+         _mesa_BindProgram(GL_FRAGMENT_PROGRAM_ARB, blit->DepthFP);

+         _mesa_set_enable(ctx, GL_FRAGMENT_PROGRAM_ARB, GL_TRUE);

+         _mesa_ColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);

+         _mesa_set_enable(ctx, GL_DEPTH_TEST, GL_TRUE);

+         _mesa_DepthFunc(GL_ALWAYS);

+         _mesa_DepthMask(GL_TRUE);

+

+         _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);

+         mask &= ~GL_DEPTH_BUFFER_BIT;

+

+         free(tmp);

+      }

+   }

+

+   if (mask & GL_STENCIL_BUFFER_BIT) {

+      /* XXX can't easily do stencil */

+   }

+

+   _mesa_set_enable(ctx, tex->Target, GL_FALSE);

+

+   _mesa_meta_end(ctx);

+

+   if (mask) {

+      _swrast_BlitFramebuffer(ctx, srcX0, srcY0, srcX1, srcY1,

+                              dstX0, dstY0, dstX1, dstY1, mask, filter);

+   }

+}

+

+

+/**

+ * Meta implementation of ctx->Driver.Clear() in terms of polygon rendering.

+ */

+void

+_mesa_meta_Clear(struct gl_context *ctx, GLbitfield buffers)

+{

+   struct clear_state *clear = &ctx->Meta->Clear;

+   struct vertex {

+      GLfloat x, y, z, r, g, b, a;

+   };

+   struct vertex verts[4];

+   /* save all state but scissor, pixel pack/unpack */

+   GLbitfield metaSave = (META_ALL -

+			  META_SCISSOR -

+			  META_PIXEL_STORE -

+			  META_CONDITIONAL_RENDER);

+   const GLuint stencilMax = (1 << ctx->DrawBuffer->Visual.stencilBits) - 1;

+

+   if (buffers & BUFFER_BITS_COLOR) {

+      /* if clearing color buffers, don't save/restore colormask */

+      metaSave -= META_COLOR_MASK;

+   }

+

+   _mesa_meta_begin(ctx, metaSave);

+

+   if (clear->ArrayObj == 0) {

+      /* one-time setup */

+

+      /* create vertex array object */

+      _mesa_GenVertexArrays(1, &clear->ArrayObj);

+      _mesa_BindVertexArray(clear->ArrayObj);

+

+      /* create vertex array buffer */

+      _mesa_GenBuffersARB(1, &clear->VBO);

+      _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, clear->VBO);

+

+      /* setup vertex arrays */

+      _mesa_VertexPointer(3, GL_FLOAT, sizeof(struct vertex), OFFSET(x));

+      _mesa_ColorPointer(4, GL_FLOAT, sizeof(struct vertex), OFFSET(r));

+      _mesa_EnableClientState(GL_VERTEX_ARRAY);

+      _mesa_EnableClientState(GL_COLOR_ARRAY);

+   }

+   else {

+      _mesa_BindVertexArray(clear->ArrayObj);

+      _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, clear->VBO);

+   }

+

+   /* GL_COLOR_BUFFER_BIT */

+   if (buffers & BUFFER_BITS_COLOR) {

+      /* leave colormask, glDrawBuffer state as-is */

+

+      /* Clears never have the color clamped. */

+      _mesa_ClampColorARB(GL_CLAMP_FRAGMENT_COLOR, GL_FALSE);

+   }

+   else {

+      ASSERT(metaSave & META_COLOR_MASK);

+      _mesa_ColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);

+   }

+

+   /* GL_DEPTH_BUFFER_BIT */

+   if (buffers & BUFFER_BIT_DEPTH) {

+      _mesa_set_enable(ctx, GL_DEPTH_TEST, GL_TRUE);

+      _mesa_DepthFunc(GL_ALWAYS);

+      _mesa_DepthMask(GL_TRUE);

+   }

+   else {

+      assert(!ctx->Depth.Test);

+   }

+

+   /* GL_STENCIL_BUFFER_BIT */

+   if (buffers & BUFFER_BIT_STENCIL) {

+      _mesa_set_enable(ctx, GL_STENCIL_TEST, GL_TRUE);

+      _mesa_StencilOpSeparate(GL_FRONT_AND_BACK,

+                              GL_REPLACE, GL_REPLACE, GL_REPLACE);

+      _mesa_StencilFuncSeparate(GL_FRONT_AND_BACK, GL_ALWAYS,

+                                ctx->Stencil.Clear & stencilMax,

+                                ctx->Stencil.WriteMask[0]);

+   }

+   else {

+      assert(!ctx->Stencil.Enabled);

+   }

+

+   /* vertex positions/colors */

+   {

+      const GLfloat x0 = (GLfloat) ctx->DrawBuffer->_Xmin;

+      const GLfloat y0 = (GLfloat) ctx->DrawBuffer->_Ymin;

+      const GLfloat x1 = (GLfloat) ctx->DrawBuffer->_Xmax;

+      const GLfloat y1 = (GLfloat) ctx->DrawBuffer->_Ymax;

+      const GLfloat z = invert_z(ctx->Depth.Clear);

+      GLuint i;

+

+      verts[0].x = x0;

+      verts[0].y = y0;

+      verts[0].z = z;

+      verts[1].x = x1;

+      verts[1].y = y0;

+      verts[1].z = z;

+      verts[2].x = x1;

+      verts[2].y = y1;

+      verts[2].z = z;

+      verts[3].x = x0;

+      verts[3].y = y1;

+      verts[3].z = z;

+

+      /* vertex colors */

+      for (i = 0; i < 4; i++) {

+         verts[i].r = ctx->Color.ClearColorUnclamped[0];

+         verts[i].g = ctx->Color.ClearColorUnclamped[1];

+         verts[i].b = ctx->Color.ClearColorUnclamped[2];

+         verts[i].a = ctx->Color.ClearColorUnclamped[3];

+      }

+

+      /* upload new vertex data */

+      _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts), verts,

+			  GL_DYNAMIC_DRAW_ARB);

+   }

+

+   /* draw quad */

+   _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);

+

+   _mesa_meta_end(ctx);

+}

+

+

+/**

+ * Meta implementation of ctx->Driver.CopyPixels() in terms

+ * of texture mapping and polygon rendering.

+ */

+void

+_mesa_meta_CopyPixels(struct gl_context *ctx, GLint srcX, GLint srcY,

+                      GLsizei width, GLsizei height,

+                      GLint dstX, GLint dstY, GLenum type)

+{

+   struct copypix_state *copypix = &ctx->Meta->CopyPix;

+   struct temp_texture *tex = get_temp_texture(ctx);

+   struct vertex {

+      GLfloat x, y, z, s, t;

+   };

+   struct vertex verts[4];

+   GLboolean newTex;

+   GLenum intFormat = GL_RGBA;

+

+   if (type != GL_COLOR ||

+       ctx->_ImageTransferState ||

+       ctx->Fog.Enabled ||

+       width > tex->MaxSize ||

+       height > tex->MaxSize) {

+      /* XXX avoid this fallback */

+      _swrast_CopyPixels(ctx, srcX, srcY, width, height, dstX, dstY, type);

+      return;

+   }

+

+   /* Most GL state applies to glCopyPixels, but a there's a few things

+    * we need to override:

+    */

+   _mesa_meta_begin(ctx, (META_RASTERIZATION |

+                          META_SHADER |

+                          META_TEXTURE |

+                          META_TRANSFORM |

+                          META_VERTEX |

+                          META_VIEWPORT));

+

+   if (copypix->ArrayObj == 0) {

+      /* one-time setup */

+

+      /* create vertex array object */

+      _mesa_GenVertexArrays(1, &copypix->ArrayObj);

+      _mesa_BindVertexArray(copypix->ArrayObj);

+

+      /* create vertex array buffer */

+      _mesa_GenBuffersARB(1, &copypix->VBO);

+      _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, copypix->VBO);

+      _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts),

+                          NULL, GL_DYNAMIC_DRAW_ARB);

+

+      /* setup vertex arrays */

+      _mesa_VertexPointer(3, GL_FLOAT, sizeof(struct vertex), OFFSET(x));

+      _mesa_TexCoordPointer(2, GL_FLOAT, sizeof(struct vertex), OFFSET(s));

+      _mesa_EnableClientState(GL_VERTEX_ARRAY);

+      _mesa_EnableClientState(GL_TEXTURE_COORD_ARRAY);

+   }

+   else {

+      _mesa_BindVertexArray(copypix->ArrayObj);

+      _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, copypix->VBO);

+   }

+

+   newTex = alloc_texture(tex, width, height, intFormat);

+

+   /* vertex positions, texcoords (after texture allocation!) */

+   {

+      const GLfloat dstX0 = (GLfloat) dstX;

+      const GLfloat dstY0 = (GLfloat) dstY;

+      const GLfloat dstX1 = dstX + width * ctx->Pixel.ZoomX;

+      const GLfloat dstY1 = dstY + height * ctx->Pixel.ZoomY;

+      const GLfloat z = invert_z(ctx->Current.RasterPos[2]);

+

+      verts[0].x = dstX0;

+      verts[0].y = dstY0;

+      verts[0].z = z;

+      verts[0].s = 0.0F;

+      verts[0].t = 0.0F;

+      verts[1].x = dstX1;

+      verts[1].y = dstY0;

+      verts[1].z = z;

+      verts[1].s = tex->Sright;

+      verts[1].t = 0.0F;

+      verts[2].x = dstX1;

+      verts[2].y = dstY1;

+      verts[2].z = z;

+      verts[2].s = tex->Sright;

+      verts[2].t = tex->Ttop;

+      verts[3].x = dstX0;

+      verts[3].y = dstY1;

+      verts[3].z = z;

+      verts[3].s = 0.0F;

+      verts[3].t = tex->Ttop;

+

+      /* upload new vertex data */

+      _mesa_BufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);

+   }

+

+   /* Alloc/setup texture */

+   setup_copypix_texture(tex, newTex, srcX, srcY, width, height,

+                         GL_RGBA, GL_NEAREST);

+

+   _mesa_set_enable(ctx, tex->Target, GL_TRUE);

+

+   /* draw textured quad */

+   _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);

+

+   _mesa_set_enable(ctx, tex->Target, GL_FALSE);

+

+   _mesa_meta_end(ctx);

+}

+

+

+

+/**

+ * When the glDrawPixels() image size is greater than the max rectangle

+ * texture size we use this function to break the glDrawPixels() image

+ * into tiles which fit into the max texture size.

+ */

+static void

+tiled_draw_pixels(struct gl_context *ctx,

+                  GLint tileSize,

+                  GLint x, GLint y, GLsizei width, GLsizei height,

+                  GLenum format, GLenum type,

+                  const struct gl_pixelstore_attrib *unpack,

+                  const GLvoid *pixels)

+{

+   struct gl_pixelstore_attrib tileUnpack = *unpack;

+   GLint i, j;

+

+   if (tileUnpack.RowLength == 0)

+      tileUnpack.RowLength = width;

+

+   for (i = 0; i < width; i += tileSize) {

+      const GLint tileWidth = MIN2(tileSize, width - i);

+      const GLint tileX = (GLint) (x + i * ctx->Pixel.ZoomX);

+

+      tileUnpack.SkipPixels = unpack->SkipPixels + i;

+

+      for (j = 0; j < height; j += tileSize) {

+         const GLint tileHeight = MIN2(tileSize, height - j);

+         const GLint tileY = (GLint) (y + j * ctx->Pixel.ZoomY);

+

+         tileUnpack.SkipRows = unpack->SkipRows + j;

+

+         _mesa_meta_DrawPixels(ctx, tileX, tileY, tileWidth, tileHeight,

+                               format, type, &tileUnpack, pixels);

+      }

+   }

+}

+

+

+/**

+ * One-time init for drawing stencil pixels.

+ */

+static void

+init_draw_stencil_pixels(struct gl_context *ctx)

+{

+   /* This program is run eight times, once for each stencil bit.

+    * The stencil values to draw are found in an 8-bit alpha texture.

+    * We read the texture/stencil value and test if bit 'b' is set.

+    * If the bit is not set, use KIL to kill the fragment.

+    * Finally, we use the stencil test to update the stencil buffer.

+    *

+    * The basic algorithm for checking if a bit is set is:

+    *   if (is_odd(value / (1 << bit)))

+    *      result is one (or non-zero).

+    *   else

+    *      result is zero.

+    * The program parameter contains three values:

+    *   parm.x = 255 / (1 << bit)

+    *   parm.y = 0.5

+    *   parm.z = 0.0

+    */

+   static const char *program =

+      "!!ARBfp1.0\n"

+      "PARAM parm = program.local[0]; \n"

+      "TEMP t; \n"

+      "TEX t, fragment.texcoord[0], texture[0], %s; \n"   /* NOTE %s here! */

+      "# t = t * 255 / bit \n"

+      "MUL t.x, t.a, parm.x; \n"

+      "# t = (int) t \n"

+      "FRC t.y, t.x; \n"

+      "SUB t.x, t.x, t.y; \n"

+      "# t = t * 0.5 \n"

+      "MUL t.x, t.x, parm.y; \n"

+      "# t = fract(t.x) \n"

+      "FRC t.x, t.x; # if t.x != 0, then the bit is set \n"

+      "# t.x = (t.x == 0 ? 1 : 0) \n"

+      "SGE t.x, -t.x, parm.z; \n"

+      "KIL -t.x; \n"

+      "# for debug only \n"

+      "#MOV result.color, t.x; \n"

+      "END \n";

+   char program2[1000];

+   struct drawpix_state *drawpix = &ctx->Meta->DrawPix;

+   struct temp_texture *tex = get_temp_texture(ctx);

+   const char *texTarget;

+

+   assert(drawpix->StencilFP == 0);

+

+   /* replace %s with "RECT" or "2D" */

+   assert(strlen(program) + 4 < sizeof(program2));

+   if (tex->Target == GL_TEXTURE_RECTANGLE)

+      texTarget = "RECT";

+   else

+      texTarget = "2D";

+   _mesa_snprintf(program2, sizeof(program2), program, texTarget);

+

+   _mesa_GenPrograms(1, &drawpix->StencilFP);

+   _mesa_BindProgram(GL_FRAGMENT_PROGRAM_ARB, drawpix->StencilFP);

+   _mesa_ProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,

+                          strlen(program2), (const GLubyte *) program2);

+}

+

+

+/**

+ * One-time init for drawing depth pixels.

+ */

+static void

+init_draw_depth_pixels(struct gl_context *ctx)

+{

+   static const char *program =

+      "!!ARBfp1.0\n"

+      "PARAM color = program.local[0]; \n"

+      "TEX result.depth, fragment.texcoord[0], texture[0], %s; \n"

+      "MOV result.color, color; \n"

+      "END \n";

+   char program2[200];

+   struct drawpix_state *drawpix = &ctx->Meta->DrawPix;

+   struct temp_texture *tex = get_temp_texture(ctx);

+   const char *texTarget;

+

+   assert(drawpix->DepthFP == 0);

+

+   /* replace %s with "RECT" or "2D" */

+   assert(strlen(program) + 4 < sizeof(program2));

+   if (tex->Target == GL_TEXTURE_RECTANGLE)

+      texTarget = "RECT";

+   else

+      texTarget = "2D";

+   _mesa_snprintf(program2, sizeof(program2), program, texTarget);

+

+   _mesa_GenPrograms(1, &drawpix->DepthFP);

+   _mesa_BindProgram(GL_FRAGMENT_PROGRAM_ARB, drawpix->DepthFP);

+   _mesa_ProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,

+                          strlen(program2), (const GLubyte *) program2);

+}

+

+

+/**

+ * Meta implementation of ctx->Driver.DrawPixels() in terms

+ * of texture mapping and polygon rendering.

+ */

+void

+_mesa_meta_DrawPixels(struct gl_context *ctx,

+                      GLint x, GLint y, GLsizei width, GLsizei height,

+                      GLenum format, GLenum type,

+                      const struct gl_pixelstore_attrib *unpack,

+                      const GLvoid *pixels)

+{

+   struct drawpix_state *drawpix = &ctx->Meta->DrawPix;

+   struct temp_texture *tex = get_temp_texture(ctx);

+   const struct gl_pixelstore_attrib unpackSave = ctx->Unpack;

+   const GLuint origStencilMask = ctx->Stencil.WriteMask[0];

+   struct vertex {

+      GLfloat x, y, z, s, t;

+   };

+   struct vertex verts[4];

+   GLenum texIntFormat;

+   GLboolean fallback, newTex;

+   GLbitfield metaExtraSave = 0x0;

+   GLuint vbo;

+

+   /*

+    * Determine if we can do the glDrawPixels with texture mapping.

+    */

+   fallback = GL_FALSE;

+   if (ctx->_ImageTransferState ||

+       ctx->Fog.Enabled) {

+      fallback = GL_TRUE;

+   }

+

+   if (_mesa_is_color_format(format)) {

+      /* use more compact format when possible */

+      /* XXX disable special case for GL_LUMINANCE for now to work around

+       * apparent i965 driver bug (see bug #23670).

+       */

+      if (/*format == GL_LUMINANCE ||*/ format == GL_LUMINANCE_ALPHA)

+         texIntFormat = format;

+      else

+         texIntFormat = GL_RGBA;

+

+      /* If we're not supposed to clamp the resulting color, then just

+       * promote our texture to fully float.  We could do better by

+       * just going for the matching set of channels, in floating

+       * point.

+       */

+      if (ctx->Color.ClampFragmentColor != GL_TRUE &&

+	  ctx->Extensions.ARB_texture_float)

+	 texIntFormat = GL_RGBA32F;

+   }

+   else if (_mesa_is_stencil_format(format)) {

+      if (ctx->Extensions.ARB_fragment_program &&

+          ctx->Pixel.IndexShift == 0 &&

+          ctx->Pixel.IndexOffset == 0 &&

+          type == GL_UNSIGNED_BYTE) {

+         /* We'll store stencil as alpha.  This only works for GLubyte

+          * image data because of how incoming values are mapped to alpha

+          * in [0,1].

+          */

+         texIntFormat = GL_ALPHA;

+         metaExtraSave = (META_COLOR_MASK |

+                          META_DEPTH_TEST |

+                          META_SHADER |

+                          META_STENCIL_TEST);

+      }

+      else {

+         fallback = GL_TRUE;

+      }

+   }

+   else if (_mesa_is_depth_format(format)) {

+      if (ctx->Extensions.ARB_depth_texture &&

+          ctx->Extensions.ARB_fragment_program) {

+         texIntFormat = GL_DEPTH_COMPONENT;

+         metaExtraSave = (META_SHADER);

+      }

+      else {

+         fallback = GL_TRUE;

+      }

+   }

+   else {

+      fallback = GL_TRUE;

+   }

+

+   if (fallback) {

+      _swrast_DrawPixels(ctx, x, y, width, height,

+                         format, type, unpack, pixels);

+      return;

+   }

+

+   /*

+    * Check image size against max texture size, draw as tiles if needed.

+    */

+   if (width > tex->MaxSize || height > tex->MaxSize) {

+      tiled_draw_pixels(ctx, tex->MaxSize, x, y, width, height,

+                        format, type, unpack, pixels);

+      return;

+   }

+

+   /* Most GL state applies to glDrawPixels (like blending, stencil, etc),

+    * but a there's a few things we need to override:

+    */

+   _mesa_meta_begin(ctx, (META_RASTERIZATION |

+                          META_SHADER |

+                          META_TEXTURE |

+                          META_TRANSFORM |

+                          META_VERTEX |

+                          META_VIEWPORT |

+			  META_CLAMP_FRAGMENT_COLOR |

+                          metaExtraSave));

+

+   newTex = alloc_texture(tex, width, height, texIntFormat);

+

+   /* vertex positions, texcoords (after texture allocation!) */

+   {

+      const GLfloat x0 = (GLfloat) x;

+      const GLfloat y0 = (GLfloat) y;

+      const GLfloat x1 = x + width * ctx->Pixel.ZoomX;

+      const GLfloat y1 = y + height * ctx->Pixel.ZoomY;

+      const GLfloat z = invert_z(ctx->Current.RasterPos[2]);

+

+      verts[0].x = x0;

+      verts[0].y = y0;

+      verts[0].z = z;

+      verts[0].s = 0.0F;

+      verts[0].t = 0.0F;

+      verts[1].x = x1;

+      verts[1].y = y0;

+      verts[1].z = z;

+      verts[1].s = tex->Sright;

+      verts[1].t = 0.0F;

+      verts[2].x = x1;

+      verts[2].y = y1;

+      verts[2].z = z;

+      verts[2].s = tex->Sright;

+      verts[2].t = tex->Ttop;

+      verts[3].x = x0;

+      verts[3].y = y1;

+      verts[3].z = z;

+      verts[3].s = 0.0F;

+      verts[3].t = tex->Ttop;

+   }

+

+   if (drawpix->ArrayObj == 0) {

+      /* one-time setup: create vertex array object */

+      _mesa_GenVertexArrays(1, &drawpix->ArrayObj);

+   }

+   _mesa_BindVertexArray(drawpix->ArrayObj);

+

+   /* create vertex array buffer */

+   _mesa_GenBuffersARB(1, &vbo);

+   _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, vbo);

+   _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts),

+                       verts, GL_DYNAMIC_DRAW_ARB);

+

+   /* setup vertex arrays */

+   _mesa_VertexPointer(3, GL_FLOAT, sizeof(struct vertex), OFFSET(x));

+   _mesa_TexCoordPointer(2, GL_FLOAT, sizeof(struct vertex), OFFSET(s));

+   _mesa_EnableClientState(GL_VERTEX_ARRAY);

+   _mesa_EnableClientState(GL_TEXTURE_COORD_ARRAY);

+

+   /* set given unpack params */

+   ctx->Unpack = *unpack;

+

+   _mesa_set_enable(ctx, tex->Target, GL_TRUE);

+

+   if (_mesa_is_stencil_format(format)) {

+      /* Drawing stencil */

+      GLint bit;

+

+      if (!drawpix->StencilFP)

+         init_draw_stencil_pixels(ctx);

+

+      setup_drawpix_texture(ctx, tex, newTex, texIntFormat, width, height,

+                            GL_ALPHA, type, pixels);

+

+      _mesa_ColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);

+

+      _mesa_set_enable(ctx, GL_STENCIL_TEST, GL_TRUE);

+

+      /* set all stencil bits to 0 */

+      _mesa_StencilOp(GL_REPLACE, GL_REPLACE, GL_REPLACE);

+      _mesa_StencilFunc(GL_ALWAYS, 0, 255);

+      _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);

+  

+      /* set stencil bits to 1 where needed */

+      _mesa_StencilOp(GL_KEEP, GL_KEEP, GL_REPLACE);

+

+      _mesa_BindProgram(GL_FRAGMENT_PROGRAM_ARB, drawpix->StencilFP);

+      _mesa_set_enable(ctx, GL_FRAGMENT_PROGRAM_ARB, GL_TRUE);

+

+      for (bit = 0; bit < ctx->DrawBuffer->Visual.stencilBits; bit++) {

+         const GLuint mask = 1 << bit;

+         if (mask & origStencilMask) {

+            _mesa_StencilFunc(GL_ALWAYS, mask, mask);

+            _mesa_StencilMask(mask);

+

+            _mesa_ProgramLocalParameter4fARB(GL_FRAGMENT_PROGRAM_ARB, 0,

+                                             255.0 / mask, 0.5, 0.0, 0.0);

+

+            _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);

+         }

+      }

+   }

+   else if (_mesa_is_depth_format(format)) {

+      /* Drawing depth */

+      if (!drawpix->DepthFP)

+         init_draw_depth_pixels(ctx);

+

+      _mesa_BindProgram(GL_FRAGMENT_PROGRAM_ARB, drawpix->DepthFP);

+      _mesa_set_enable(ctx, GL_FRAGMENT_PROGRAM_ARB, GL_TRUE);

+

+      /* polygon color = current raster color */

+      _mesa_ProgramLocalParameter4fvARB(GL_FRAGMENT_PROGRAM_ARB, 0,

+                                        ctx->Current.RasterColor);

+

+      setup_drawpix_texture(ctx, tex, newTex, texIntFormat, width, height,

+                            format, type, pixels);

+

+      _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);

+   }

+   else {

+      /* Drawing RGBA */

+      setup_drawpix_texture(ctx, tex, newTex, texIntFormat, width, height,

+                            format, type, pixels);

+      _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);

+   }

+

+   _mesa_set_enable(ctx, tex->Target, GL_FALSE);

+

+   _mesa_DeleteBuffersARB(1, &vbo);

+

+   /* restore unpack params */

+   ctx->Unpack = unpackSave;

+

+   _mesa_meta_end(ctx);

+}

+

+static GLboolean

+alpha_test_raster_color(struct gl_context *ctx)

+{

+   GLfloat alpha = ctx->Current.RasterColor[ACOMP];

+   GLfloat ref = ctx->Color.AlphaRef;

+

+   switch (ctx->Color.AlphaFunc) {

+      case GL_NEVER:

+	 return GL_FALSE;

+      case GL_LESS:

+	 return alpha < ref;

+      case GL_EQUAL:

+	 return alpha == ref;

+      case GL_LEQUAL:

+	 return alpha <= ref;

+      case GL_GREATER:

+	 return alpha > ref;

+      case GL_NOTEQUAL:

+	 return alpha != ref;

+      case GL_GEQUAL:

+	 return alpha >= ref;

+      case GL_ALWAYS:

+	 return GL_TRUE;

+      default:

+	 assert(0);

+	 return GL_FALSE;

+   }

+}

+

+/**

+ * Do glBitmap with a alpha texture quad.  Use the alpha test to cull

+ * the 'off' bits.  A bitmap cache as in the gallium/mesa state

+ * tracker would improve performance a lot.

+ */

+void

+_mesa_meta_Bitmap(struct gl_context *ctx,

+                  GLint x, GLint y, GLsizei width, GLsizei height,

+                  const struct gl_pixelstore_attrib *unpack,

+                  const GLubyte *bitmap1)

+{

+   struct bitmap_state *bitmap = &ctx->Meta->Bitmap;

+   struct temp_texture *tex = get_bitmap_temp_texture(ctx);

+   const GLenum texIntFormat = GL_ALPHA;

+   const struct gl_pixelstore_attrib unpackSave = *unpack;

+   GLubyte fg, bg;

+   struct vertex {

+      GLfloat x, y, z, s, t, r, g, b, a;

+   };

+   struct vertex verts[4];

+   GLboolean newTex;

+   GLubyte *bitmap8;

+

+   /*

+    * Check if swrast fallback is needed.

+    */

+   if (ctx->_ImageTransferState ||

+       ctx->FragmentProgram._Enabled ||

+       ctx->Fog.Enabled ||

+       ctx->Texture._EnabledUnits ||

+       width > tex->MaxSize ||

+       height > tex->MaxSize) {

+      _swrast_Bitmap(ctx, x, y, width, height, unpack, bitmap1);

+      return;

+   }

+

+   if (ctx->Color.AlphaEnabled && !alpha_test_raster_color(ctx))

+      return;

+

+   /* Most GL state applies to glBitmap (like blending, stencil, etc),

+    * but a there's a few things we need to override:

+    */

+   _mesa_meta_begin(ctx, (META_ALPHA_TEST |

+                          META_PIXEL_STORE |

+                          META_RASTERIZATION |

+                          META_SHADER |

+                          META_TEXTURE |

+                          META_TRANSFORM |

+                          META_VERTEX |

+                          META_VIEWPORT));

+

+   if (bitmap->ArrayObj == 0) {

+      /* one-time setup */

+

+      /* create vertex array object */

+      _mesa_GenVertexArraysAPPLE(1, &bitmap->ArrayObj);

+      _mesa_BindVertexArrayAPPLE(bitmap->ArrayObj);

+

+      /* create vertex array buffer */

+      _mesa_GenBuffersARB(1, &bitmap->VBO);

+      _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, bitmap->VBO);

+      _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts),

+                          NULL, GL_DYNAMIC_DRAW_ARB);

+

+      /* setup vertex arrays */

+      _mesa_VertexPointer(3, GL_FLOAT, sizeof(struct vertex), OFFSET(x));

+      _mesa_TexCoordPointer(2, GL_FLOAT, sizeof(struct vertex), OFFSET(s));

+      _mesa_ColorPointer(4, GL_FLOAT, sizeof(struct vertex), OFFSET(r));

+      _mesa_EnableClientState(GL_VERTEX_ARRAY);

+      _mesa_EnableClientState(GL_TEXTURE_COORD_ARRAY);

+      _mesa_EnableClientState(GL_COLOR_ARRAY);

+   }

+   else {

+      _mesa_BindVertexArray(bitmap->ArrayObj);

+      _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, bitmap->VBO);

+   }

+

+   newTex = alloc_texture(tex, width, height, texIntFormat);

+

+   /* vertex positions, texcoords, colors (after texture allocation!) */

+   {

+      const GLfloat x0 = (GLfloat) x;

+      const GLfloat y0 = (GLfloat) y;

+      const GLfloat x1 = (GLfloat) (x + width);

+      const GLfloat y1 = (GLfloat) (y + height);

+      const GLfloat z = invert_z(ctx->Current.RasterPos[2]);

+      GLuint i;

+

+      verts[0].x = x0;

+      verts[0].y = y0;

+      verts[0].z = z;

+      verts[0].s = 0.0F;

+      verts[0].t = 0.0F;

+      verts[1].x = x1;

+      verts[1].y = y0;

+      verts[1].z = z;

+      verts[1].s = tex->Sright;

+      verts[1].t = 0.0F;

+      verts[2].x = x1;

+      verts[2].y = y1;

+      verts[2].z = z;

+      verts[2].s = tex->Sright;

+      verts[2].t = tex->Ttop;

+      verts[3].x = x0;

+      verts[3].y = y1;

+      verts[3].z = z;

+      verts[3].s = 0.0F;

+      verts[3].t = tex->Ttop;

+

+      for (i = 0; i < 4; i++) {

+         verts[i].r = ctx->Current.RasterColor[0];

+         verts[i].g = ctx->Current.RasterColor[1];

+         verts[i].b = ctx->Current.RasterColor[2];

+         verts[i].a = ctx->Current.RasterColor[3];

+      }

+

+      /* upload new vertex data */

+      _mesa_BufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);

+   }

+

+   /* choose different foreground/background alpha values */

+   CLAMPED_FLOAT_TO_UBYTE(fg, ctx->Current.RasterColor[ACOMP]);

+   bg = (fg > 127 ? 0 : 255);

+

+   bitmap1 = _mesa_map_pbo_source(ctx, &unpackSave, bitmap1);

+   if (!bitmap1) {

+      _mesa_meta_end(ctx);

+      return;

+   }

+

+   bitmap8 = (GLubyte *) malloc(width * height);

+   if (bitmap8) {

+      memset(bitmap8, bg, width * height);

+      _mesa_expand_bitmap(width, height, &unpackSave, bitmap1,

+                          bitmap8, width, fg);

+

+      _mesa_set_enable(ctx, tex->Target, GL_TRUE);

+

+      _mesa_set_enable(ctx, GL_ALPHA_TEST, GL_TRUE);

+      _mesa_AlphaFunc(GL_NOTEQUAL, UBYTE_TO_FLOAT(bg));

+

+      setup_drawpix_texture(ctx, tex, newTex, texIntFormat, width, height,

+                            GL_ALPHA, GL_UNSIGNED_BYTE, bitmap8);

+

+      _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);

+

+      _mesa_set_enable(ctx, tex->Target, GL_FALSE);

+

+      free(bitmap8);

+   }

+

+   _mesa_unmap_pbo_source(ctx, &unpackSave);

+

+   _mesa_meta_end(ctx);

+}

+

+

+/**

+ * Check if the call to _mesa_meta_GenerateMipmap() will require a

+ * software fallback.  The fallback path will require that the texture

+ * images are mapped.

+ * \return GL_TRUE if a fallback is needed, GL_FALSE otherwise

+ */

+GLboolean

+_mesa_meta_check_generate_mipmap_fallback(struct gl_context *ctx, GLenum target,

+                                          struct gl_texture_object *texObj)

+{

+   const GLuint fboSave = ctx->DrawBuffer->Name;

+   struct gen_mipmap_state *mipmap = &ctx->Meta->Mipmap;

+   struct gl_texture_image *baseImage;

+   GLuint srcLevel;

+   GLenum status;

+

+   /* check for fallbacks */

+   if (!ctx->Extensions.EXT_framebuffer_object ||

+       target == GL_TEXTURE_3D) {

+      return GL_TRUE;

+   }

+

+   srcLevel = texObj->BaseLevel;

+   baseImage = _mesa_select_tex_image(ctx, texObj, target, srcLevel);

+   if (!baseImage || _mesa_is_format_compressed(baseImage->TexFormat)) {

+      return GL_TRUE;

+   }

+

+   /*

+    * Test that we can actually render in the texture's format.

+    */

+   if (!mipmap->FBO)

+      _mesa_GenFramebuffersEXT(1, &mipmap->FBO);

+   _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, mipmap->FBO);

+

+   if (target == GL_TEXTURE_1D) {

+      _mesa_FramebufferTexture1DEXT(GL_FRAMEBUFFER_EXT,

+                                    GL_COLOR_ATTACHMENT0_EXT,

+                                    target, texObj->Name, srcLevel);

+   }

+#if 0

+   /* other work is needed to enable 3D mipmap generation */

+   else if (target == GL_TEXTURE_3D) {

+      GLint zoffset = 0;

+      _mesa_FramebufferTexture3DEXT(GL_FRAMEBUFFER_EXT,

+                                    GL_COLOR_ATTACHMENT0_EXT,

+                                    target, texObj->Name, srcLevel, zoffset);

+   }

+#endif

+   else {

+      /* 2D / cube */

+      _mesa_FramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,

+                                    GL_COLOR_ATTACHMENT0_EXT,

+                                    target, texObj->Name, srcLevel);

+   }

+

+   status = _mesa_CheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);

+

+   _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, fboSave);

+

+   if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {

+      return GL_TRUE;

+   }

+

+   return GL_FALSE;

+}

+

+

+/**

+ * Called via ctx->Driver.GenerateMipmap()

+ * Note: texture borders and 3D texture support not yet complete.

+ */

+void

+_mesa_meta_GenerateMipmap(struct gl_context *ctx, GLenum target,

+                          struct gl_texture_object *texObj)

+{

+   struct gen_mipmap_state *mipmap = &ctx->Meta->Mipmap;

+   struct vertex {

+      GLfloat x, y, s, t, r;

+   };

+   struct vertex verts[4];

+   const GLuint baseLevel = texObj->BaseLevel;

+   const GLuint maxLevel = texObj->MaxLevel;

+   const GLenum minFilterSave = texObj->Sampler.MinFilter;

+   const GLenum magFilterSave = texObj->Sampler.MagFilter;

+   const GLint maxLevelSave = texObj->MaxLevel;

+   const GLboolean genMipmapSave = texObj->GenerateMipmap;

+   const GLenum wrapSSave = texObj->Sampler.WrapS;

+   const GLenum wrapTSave = texObj->Sampler.WrapT;

+   const GLenum wrapRSave = texObj->Sampler.WrapR;

+   const GLuint fboSave = ctx->DrawBuffer->Name;

+   const GLuint original_active_unit = ctx->Texture.CurrentUnit;

+   GLenum faceTarget;

+   GLuint dstLevel;

+   GLuint border = 0;

+

+   if (_mesa_meta_check_generate_mipmap_fallback(ctx, target, texObj)) {

+      _mesa_generate_mipmap(ctx, target, texObj);

+      return;

+   }

+

+   if (target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X &&

+       target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z) {

+      faceTarget = target;

+      target = GL_TEXTURE_CUBE_MAP;

+   }

+   else {

+      faceTarget = target;

+   }

+

+   _mesa_meta_begin(ctx, META_ALL);

+

+   if (original_active_unit != 0)

+      _mesa_BindTexture(target, texObj->Name);

+

+   if (mipmap->ArrayObj == 0) {

+      /* one-time setup */

+

+      /* create vertex array object */

+      _mesa_GenVertexArraysAPPLE(1, &mipmap->ArrayObj);

+      _mesa_BindVertexArrayAPPLE(mipmap->ArrayObj);

+

+      /* create vertex array buffer */

+      _mesa_GenBuffersARB(1, &mipmap->VBO);

+      _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, mipmap->VBO);

+      _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts),

+                          NULL, GL_DYNAMIC_DRAW_ARB);

+

+      /* setup vertex arrays */

+      _mesa_VertexPointer(2, GL_FLOAT, sizeof(struct vertex), OFFSET(x));

+      _mesa_TexCoordPointer(3, GL_FLOAT, sizeof(struct vertex), OFFSET(s));

+      _mesa_EnableClientState(GL_VERTEX_ARRAY);

+      _mesa_EnableClientState(GL_TEXTURE_COORD_ARRAY);

+   }

+   else {

+      _mesa_BindVertexArray(mipmap->ArrayObj);

+      _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, mipmap->VBO);

+   }

+

+   if (!mipmap->FBO) {

+      _mesa_GenFramebuffersEXT(1, &mipmap->FBO);

+   }

+   _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, mipmap->FBO);

+

+   _mesa_TexParameteri(target, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);

+   _mesa_TexParameteri(target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

+   _mesa_TexParameteri(target, GL_GENERATE_MIPMAP, GL_FALSE);

+   _mesa_TexParameteri(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);

+   _mesa_TexParameteri(target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);

+   _mesa_TexParameteri(target, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);

+

+   _mesa_set_enable(ctx, target, GL_TRUE);

+

+   /* setup texcoords once (XXX what about border?) */

+   switch (faceTarget) {

+   case GL_TEXTURE_1D:

+   case GL_TEXTURE_2D:

+      verts[0].s = 0.0F;

+      verts[0].t = 0.0F;

+      verts[0].r = 0.0F;

+      verts[1].s = 1.0F;

+      verts[1].t = 0.0F;

+      verts[1].r = 0.0F;

+      verts[2].s = 1.0F;

+      verts[2].t = 1.0F;

+      verts[2].r = 0.0F;

+      verts[3].s = 0.0F;

+      verts[3].t = 1.0F;

+      verts[3].r = 0.0F;

+      break;

+   case GL_TEXTURE_3D:

+      abort();

+      break;

+   default:

+      /* cube face */

+      {

+         static const GLfloat st[4][2] = {

+            {0.0f, 0.0f}, {1.0f, 0.0f}, {1.0f, 1.0f}, {0.0f, 1.0f}

+         };

+         GLuint i;

+

+         /* loop over quad verts */

+         for (i = 0; i < 4; i++) {

+            /* Compute sc = +/-scale and tc = +/-scale.

+             * Not +/-1 to avoid cube face selection ambiguity near the edges,

+             * though that can still sometimes happen with this scale factor...

+             */

+            const GLfloat scale = 0.9999f;

+            const GLfloat sc = (2.0f * st[i][0] - 1.0f) * scale;

+            const GLfloat tc = (2.0f * st[i][1] - 1.0f) * scale;

+

+            switch (faceTarget) {

+            case GL_TEXTURE_CUBE_MAP_POSITIVE_X:

+               verts[i].s = 1.0f;

+               verts[i].t = -tc;

+               verts[i].r = -sc;

+               break;

+            case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:

+               verts[i].s = -1.0f;

+               verts[i].t = -tc;

+               verts[i].r = sc;

+               break;

+            case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:

+               verts[i].s = sc;

+               verts[i].t = 1.0f;

+               verts[i].r = tc;

+               break;

+            case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:

+               verts[i].s = sc;

+               verts[i].t = -1.0f;

+               verts[i].r = -tc;

+               break;

+            case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:

+               verts[i].s = sc;

+               verts[i].t = -tc;

+               verts[i].r = 1.0f;

+               break;

+            case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:

+               verts[i].s = -sc;

+               verts[i].t = -tc;

+               verts[i].r = -1.0f;

+               break;

+            default:

+               assert(0);

+            }

+         }

+      }

+   }

+

+   _mesa_set_enable(ctx, target, GL_TRUE);

+

+   /* setup vertex positions */

+   {

+      verts[0].x = 0.0F;

+      verts[0].y = 0.0F;

+      verts[1].x = 1.0F;

+      verts[1].y = 0.0F;

+      verts[2].x = 1.0F;

+      verts[2].y = 1.0F;

+      verts[3].x = 0.0F;

+      verts[3].y = 1.0F;

+      

+      /* upload new vertex data */

+      _mesa_BufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);

+   }

+

+   /* setup projection matrix */

+   _mesa_MatrixMode(GL_PROJECTION);

+   _mesa_LoadIdentity();

+   _mesa_Ortho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);

+

+   /* texture is already locked, unlock now */

+   _mesa_unlock_texture(ctx, texObj);

+

+   for (dstLevel = baseLevel + 1; dstLevel <= maxLevel; dstLevel++) {

+      const struct gl_texture_image *srcImage;

+      const GLuint srcLevel = dstLevel - 1;

+      GLsizei srcWidth, srcHeight, srcDepth;

+      GLsizei dstWidth, dstHeight, dstDepth;

+      GLenum status;

+

+      srcImage = _mesa_select_tex_image(ctx, texObj, faceTarget, srcLevel);

+      assert(srcImage->Border == 0); /* XXX we can fix this */

+

+      /* src size w/out border */

+      srcWidth = srcImage->Width - 2 * border;

+      srcHeight = srcImage->Height - 2 * border;

+      srcDepth = srcImage->Depth - 2 * border;

+

+      /* new dst size w/ border */

+      dstWidth = MAX2(1, srcWidth / 2) + 2 * border;

+      dstHeight = MAX2(1, srcHeight / 2) + 2 * border;

+      dstDepth = MAX2(1, srcDepth / 2) + 2 * border;

+

+      if (dstWidth == srcImage->Width &&

+          dstHeight == srcImage->Height &&

+          dstDepth == srcImage->Depth) {

+         /* all done */

+         break;

+      }

+

+      /* Set MaxLevel large enough to hold the new level when we allocate it  */

+      _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, dstLevel);

+

+      /* Create empty dest image */

+      if (target == GL_TEXTURE_1D) {

+         _mesa_TexImage1D(target, dstLevel, srcImage->InternalFormat,

+                          dstWidth, border,

+                          GL_RGBA, GL_UNSIGNED_BYTE, NULL);

+      }

+      else if (target == GL_TEXTURE_3D) {

+         _mesa_TexImage3D(target, dstLevel, srcImage->InternalFormat,

+                          dstWidth, dstHeight, dstDepth, border,

+                          GL_RGBA, GL_UNSIGNED_BYTE, NULL);

+      }

+      else {

+         /* 2D or cube */

+         _mesa_TexImage2D(faceTarget, dstLevel, srcImage->InternalFormat,

+                          dstWidth, dstHeight, border,

+                          GL_RGBA, GL_UNSIGNED_BYTE, NULL);

+

+         if (target == GL_TEXTURE_CUBE_MAP) {

+            /* If texturing from a cube, we need to make sure all src faces

+             * have been defined (even if we're not sampling from them.)

+             * Otherwise the texture object will be 'incomplete' and

+             * texturing from it will not be allowed.

+             */

+            GLuint face;

+            for (face = 0; face < 6; face++) {

+               if (!texObj->Image[face][srcLevel] ||

+                   texObj->Image[face][srcLevel]->Width != srcWidth) {

+                  _mesa_TexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + face,

+                                   srcLevel, srcImage->InternalFormat,

+                                   srcWidth, srcHeight, border,

+                                   GL_RGBA, GL_UNSIGNED_BYTE, NULL);

+               }

+            }

+         }

+      }

+

+      /* limit minification to src level */

+      _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, srcLevel);

+

+      /* Set to draw into the current dstLevel */

+      if (target == GL_TEXTURE_1D) {

+         _mesa_FramebufferTexture1DEXT(GL_FRAMEBUFFER_EXT,

+                                       GL_COLOR_ATTACHMENT0_EXT,

+                                       target,

+                                       texObj->Name,

+                                       dstLevel);

+      }

+      else if (target == GL_TEXTURE_3D) {

+         GLint zoffset = 0; /* XXX unfinished */

+         _mesa_FramebufferTexture3DEXT(GL_FRAMEBUFFER_EXT,

+                                       GL_COLOR_ATTACHMENT0_EXT,

+                                       target,

+                                       texObj->Name,

+                                       dstLevel, zoffset);

+      }

+      else {

+         /* 2D / cube */

+         _mesa_FramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,

+                                       GL_COLOR_ATTACHMENT0_EXT,

+                                       faceTarget,

+                                       texObj->Name,

+                                       dstLevel);

+      }

+

+      _mesa_DrawBuffer(GL_COLOR_ATTACHMENT0_EXT);

+

+      /* sanity check */

+      status = _mesa_CheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);

+      if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {

+         abort();

+         break;

+      }

+

+      assert(dstWidth == ctx->DrawBuffer->Width);

+      assert(dstHeight == ctx->DrawBuffer->Height);

+

+      /* setup viewport */

+      _mesa_set_viewport(ctx, 0, 0, dstWidth, dstHeight);

+

+      _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);

+   }

+

+   _mesa_lock_texture(ctx, texObj); /* relock */

+

+   _mesa_meta_end(ctx);

+

+   _mesa_TexParameteri(target, GL_TEXTURE_MIN_FILTER, minFilterSave);

+   _mesa_TexParameteri(target, GL_TEXTURE_MAG_FILTER, magFilterSave);

+   _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, maxLevelSave);

+   _mesa_TexParameteri(target, GL_GENERATE_MIPMAP, genMipmapSave);

+   _mesa_TexParameteri(target, GL_TEXTURE_WRAP_S, wrapSSave);

+   _mesa_TexParameteri(target, GL_TEXTURE_WRAP_T, wrapTSave);

+   _mesa_TexParameteri(target, GL_TEXTURE_WRAP_R, wrapRSave);

+

+   _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, fboSave);

+}

+

+

+/**

+ * Determine the GL data type to use for the temporary image read with

+ * ReadPixels() and passed to Tex[Sub]Image().

+ */

+static GLenum

+get_temp_image_type(struct gl_context *ctx, GLenum baseFormat)

+{

+   switch (baseFormat) {

+   case GL_RGBA:

+   case GL_RGB:

+   case GL_ALPHA:

+   case GL_LUMINANCE:

+   case GL_LUMINANCE_ALPHA:

+   case GL_INTENSITY:

+      if (ctx->DrawBuffer->Visual.redBits <= 8)

+         return GL_UNSIGNED_BYTE;

+      else if (ctx->DrawBuffer->Visual.redBits <= 8)

+         return GL_UNSIGNED_SHORT;

+      else

+         return GL_FLOAT;

+   case GL_DEPTH_COMPONENT:

+      return GL_UNSIGNED_INT;

+   case GL_DEPTH_STENCIL:

+      return GL_UNSIGNED_INT_24_8;

+   default:

+      _mesa_problem(ctx, "Unexpected format in get_temp_image_type()");

+      return 0;

+   }

+}

+

+

+/**

+ * Helper for _mesa_meta_CopyTexImage1/2D() functions.

+ * Have to be careful with locking and meta state for pixel transfer.

+ */

+static void

+copy_tex_image(struct gl_context *ctx, GLuint dims, GLenum target, GLint level,

+               GLenum internalFormat, GLint x, GLint y,

+               GLsizei width, GLsizei height, GLint border)

+{

+   struct gl_texture_object *texObj;

+   struct gl_texture_image *texImage;

+   GLenum format, type;

+   GLint bpp;

+   void *buf;

+

+   texObj = _mesa_get_current_tex_object(ctx, target);

+   texImage = _mesa_get_tex_image(ctx, texObj, target, level);

+

+   /* Choose format/type for temporary image buffer */

+   format = _mesa_base_tex_format(ctx, internalFormat);

+   type = get_temp_image_type(ctx, format);

+   bpp = _mesa_bytes_per_pixel(format, type);

+   if (bpp <= 0) {

+      _mesa_problem(ctx, "Bad bpp in meta copy_tex_image()");

+      return;

+   }

+

+   /*

+    * Alloc image buffer (XXX could use a PBO)

+    */

+   buf = malloc(width * height * bpp);

+   if (!buf) {

+      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexImage%uD", dims);

+      return;

+   }

+

+   _mesa_unlock_texture(ctx, texObj); /* need to unlock first */

+

+   /*

+    * Read image from framebuffer (disable pixel transfer ops)

+    */

+   _mesa_meta_begin(ctx, META_PIXEL_STORE | META_PIXEL_TRANSFER);

+   ctx->Driver.ReadPixels(ctx, x, y, width, height,

+			  format, type, &ctx->Pack, buf);

+   _mesa_meta_end(ctx);

+

+   if (texImage->Data) {

+      ctx->Driver.FreeTexImageData(ctx, texImage);

+   }

+

+   /* The texture's format was already chosen in _mesa_CopyTexImage() */

+   ASSERT(texImage->TexFormat != MESA_FORMAT_NONE);

+

+   /*

+    * Store texture data (with pixel transfer ops)

+    */

+   _mesa_meta_begin(ctx, META_PIXEL_STORE);

+

+   _mesa_update_state(ctx); /* to update pixel transfer state */

+

+   if (target == GL_TEXTURE_1D) {

+      ctx->Driver.TexImage1D(ctx, target, level, internalFormat,

+                             width, border, format, type,

+                             buf, &ctx->Unpack, texObj, texImage);

+   }

+   else {

+      ctx->Driver.TexImage2D(ctx, target, level, internalFormat,

+                             width, height, border, format, type,

+                             buf, &ctx->Unpack, texObj, texImage);

+   }

+   _mesa_meta_end(ctx);

+

+   _mesa_lock_texture(ctx, texObj); /* re-lock */

+

+   free(buf);

+}

+

+

+void

+_mesa_meta_CopyTexImage1D(struct gl_context *ctx, GLenum target, GLint level,

+                          GLenum internalFormat, GLint x, GLint y,

+                          GLsizei width, GLint border)

+{

+   copy_tex_image(ctx, 1, target, level, internalFormat, x, y,

+                  width, 1, border);

+}

+

+

+void

+_mesa_meta_CopyTexImage2D(struct gl_context *ctx, GLenum target, GLint level,

+                          GLenum internalFormat, GLint x, GLint y,

+                          GLsizei width, GLsizei height, GLint border)

+{

+   copy_tex_image(ctx, 2, target, level, internalFormat, x, y,

+                  width, height, border);

+}

+

+

+

+/**

+ * Helper for _mesa_meta_CopyTexSubImage1/2/3D() functions.

+ * Have to be careful with locking and meta state for pixel transfer.

+ */

+static void

+copy_tex_sub_image(struct gl_context *ctx,

+                   GLuint dims, GLenum target, GLint level,

+                   GLint xoffset, GLint yoffset, GLint zoffset,

+                   GLint x, GLint y,

+                   GLsizei width, GLsizei height)

+{

+   struct gl_texture_object *texObj;

+   struct gl_texture_image *texImage;

+   GLenum format, type;

+   GLint bpp;

+   void *buf;

+

+   texObj = _mesa_get_current_tex_object(ctx, target);

+   texImage = _mesa_select_tex_image(ctx, texObj, target, level);

+

+   /* Choose format/type for temporary image buffer */

+   format = _mesa_get_format_base_format(texImage->TexFormat);

+   type = get_temp_image_type(ctx, format);

+   bpp = _mesa_bytes_per_pixel(format, type);

+   if (bpp <= 0) {

+      _mesa_problem(ctx, "Bad bpp in meta copy_tex_sub_image()");

+      return;

+   }

+

+   /*

+    * Alloc image buffer (XXX could use a PBO)

+    */

+   buf = malloc(width * height * bpp);

+   if (!buf) {

+      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage%uD", dims);

+      return;

+   }

+

+   _mesa_unlock_texture(ctx, texObj); /* need to unlock first */

+

+   /*

+    * Read image from framebuffer (disable pixel transfer ops)

+    */

+   _mesa_meta_begin(ctx, META_PIXEL_STORE | META_PIXEL_TRANSFER);

+   ctx->Driver.ReadPixels(ctx, x, y, width, height,

+			  format, type, &ctx->Pack, buf);

+   _mesa_meta_end(ctx);

+

+   _mesa_update_state(ctx); /* to update pixel transfer state */

+

+   /*

+    * Store texture data (with pixel transfer ops)

+    */

+   _mesa_meta_begin(ctx, META_PIXEL_STORE);

+   if (target == GL_TEXTURE_1D) {

+      ctx->Driver.TexSubImage1D(ctx, target, level, xoffset,

+                                width, format, type, buf,

+                                &ctx->Unpack, texObj, texImage);

+   }

+   else if (target == GL_TEXTURE_3D) {

+      ctx->Driver.TexSubImage3D(ctx, target, level, xoffset, yoffset, zoffset,

+                                width, height, 1, format, type, buf,

+                                &ctx->Unpack, texObj, texImage);

+   }

+   else {

+      ctx->Driver.TexSubImage2D(ctx, target, level, xoffset, yoffset,

+                                width, height, format, type, buf,

+                                &ctx->Unpack, texObj, texImage);

+   }

+   _mesa_meta_end(ctx);

+

+   _mesa_lock_texture(ctx, texObj); /* re-lock */

+

+   free(buf);

+}

+

+

+void

+_mesa_meta_CopyTexSubImage1D(struct gl_context *ctx, GLenum target, GLint level,

+                             GLint xoffset,

+                             GLint x, GLint y, GLsizei width)

+{

+   copy_tex_sub_image(ctx, 1, target, level, xoffset, 0, 0,

+                      x, y, width, 1);

+}

+

+

+void

+_mesa_meta_CopyTexSubImage2D(struct gl_context *ctx, GLenum target, GLint level,

+                             GLint xoffset, GLint yoffset,

+                             GLint x, GLint y,

+                             GLsizei width, GLsizei height)

+{

+   copy_tex_sub_image(ctx, 2, target, level, xoffset, yoffset, 0,

+                      x, y, width, height);

+}

+

+

+void

+_mesa_meta_CopyTexSubImage3D(struct gl_context *ctx, GLenum target, GLint level,

+                             GLint xoffset, GLint yoffset, GLint zoffset,

+                             GLint x, GLint y,

+                             GLsizei width, GLsizei height)

+{

+   copy_tex_sub_image(ctx, 3, target, level, xoffset, yoffset, zoffset,

+                      x, y, width, height);

+}

+

+

+void

+_mesa_meta_CopyColorTable(struct gl_context *ctx,

+                          GLenum target, GLenum internalformat,

+                          GLint x, GLint y, GLsizei width)

+{

+   GLfloat *buf;

+

+   buf = (GLfloat *) malloc(width * 4 * sizeof(GLfloat));

+   if (!buf) {

+      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyColorTable");

+      return;

+   }

+

+   /*

+    * Read image from framebuffer (disable pixel transfer ops)

+    */

+   _mesa_meta_begin(ctx, META_PIXEL_STORE | META_PIXEL_TRANSFER);

+   ctx->Driver.ReadPixels(ctx, x, y, width, 1,

+                          GL_RGBA, GL_FLOAT, &ctx->Pack, buf);

+

+   _mesa_ColorTable(target, internalformat, width, GL_RGBA, GL_FLOAT, buf);

+

+   _mesa_meta_end(ctx);

+

+   free(buf);

+}

+

+

+void

+_mesa_meta_CopyColorSubTable(struct gl_context *ctx,GLenum target, GLsizei start,

+                             GLint x, GLint y, GLsizei width)

+{

+   GLfloat *buf;

+

+   buf = (GLfloat *) malloc(width * 4 * sizeof(GLfloat));

+   if (!buf) {

+      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyColorSubTable");

+      return;

+   }

+

+   /*

+    * Read image from framebuffer (disable pixel transfer ops)

+    */

+   _mesa_meta_begin(ctx, META_PIXEL_STORE | META_PIXEL_TRANSFER);

+   ctx->Driver.ReadPixels(ctx, x, y, width, 1,

+                          GL_RGBA, GL_FLOAT, &ctx->Pack, buf);

+

+   _mesa_ColorSubTable(target, start, width, GL_RGBA, GL_FLOAT, buf);

+

+   _mesa_meta_end(ctx);

+

+   free(buf);

+}