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-rw-r--r--mesalib/src/mesa/drivers/common/meta.c5704
1 files changed, 2852 insertions, 2852 deletions
diff --git a/mesalib/src/mesa/drivers/common/meta.c b/mesalib/src/mesa/drivers/common/meta.c
index 2b00e8979..a3720a24d 100644
--- a/mesalib/src/mesa/drivers/common/meta.c
+++ b/mesalib/src/mesa/drivers/common/meta.c
@@ -1,2852 +1,2852 @@
-/*
- * 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/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
-/*@}*/
-
-
-/**
- * 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;
-
- /** 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);
- }
-
- /* 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);
- }
-
- /* 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->MinFilter;
- const GLenum magFilterSave = texObj->MagFilter;
- const GLint baseLevelSave = texObj->BaseLevel;
- const GLint maxLevelSave = texObj->MaxLevel;
- const GLenum wrapSSave = texObj->WrapS;
- const GLenum wrapTSave = texObj->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;
- 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 */
- }
- 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.ClearColor[0];
- verts[i].g = ctx->Color.ClearColor[1];
- verts[i].b = ctx->Color.ClearColor[2];
- verts[i].a = ctx->Color.ClearColor[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;
- }
- 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 |
- 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->MinFilter;
- const GLenum magFilterSave = texObj->MagFilter;
- const GLint maxLevelSave = texObj->MaxLevel;
- const GLboolean genMipmapSave = texObj->GenerateMipmap;
- const GLenum wrapSSave = texObj->WrapS;
- const GLenum wrapTSave = texObj->WrapT;
- const GLenum wrapRSave = texObj->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/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
+/*@}*/
+
+
+/**
+ * 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;
+
+ /** 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);
+ }
+
+ /* 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);
+ }
+
+ /* 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->MinFilter;
+ const GLenum magFilterSave = texObj->MagFilter;
+ const GLint baseLevelSave = texObj->BaseLevel;
+ const GLint maxLevelSave = texObj->MaxLevel;
+ const GLenum wrapSSave = texObj->WrapS;
+ const GLenum wrapTSave = texObj->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;
+ 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 */
+ }
+ 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.ClearColor[0];
+ verts[i].g = ctx->Color.ClearColor[1];
+ verts[i].b = ctx->Color.ClearColor[2];
+ verts[i].a = ctx->Color.ClearColor[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;
+ }
+ 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 |
+ 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->MinFilter;
+ const GLenum magFilterSave = texObj->MagFilter;
+ const GLint maxLevelSave = texObj->MaxLevel;
+ const GLboolean genMipmapSave = texObj->GenerateMipmap;
+ const GLenum wrapSSave = texObj->WrapS;
+ const GLenum wrapTSave = texObj->WrapT;
+ const GLenum wrapRSave = texObj->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);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-02 06:02:38 +0000