diff options
Diffstat (limited to 'mesalib/src/mesa/drivers/common/meta.c')
| -rw-r--r-- | mesalib/src/mesa/drivers/common/meta.c | 5704 |
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, ©pix->ArrayObj); - _mesa_BindVertexArray(copypix->ArrayObj); - - /* create vertex array buffer */ - _mesa_GenBuffersARB(1, ©pix->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, ©pix->ArrayObj);
+ _mesa_BindVertexArray(copypix->ArrayObj);
+
+ /* create vertex array buffer */
+ _mesa_GenBuffersARB(1, ©pix->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);
+}
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