attrib.c

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

      /* push the Read FBO's ReadBuffer state, not ctx->Pixel.ReadBuffer */
      attr->ReadBuffer = ctx->ReadBuffer->ColorReadBuffer;
      newnode = new_attrib_node( GL_PIXEL_MODE_BIT );
      newnode->data = attr;
      newnode->next = head;
      head = newnode;
   }

   if (mask & GL_POINT_BIT) {
      struct gl_point_attrib *attr;
      attr = MALLOC_STRUCT( gl_point_attrib );
      MEMCPY( attr, &ctx->Point, sizeof(struct gl_point_attrib) );
      newnode = new_attrib_node( GL_POINT_BIT );
      newnode->data = attr;
      newnode->next = head;
      head = newnode;
   }

   if (mask & GL_POLYGON_BIT) {
      struct gl_polygon_attrib *attr;
      attr = MALLOC_STRUCT( gl_polygon_attrib );
      MEMCPY( attr, &ctx->Polygon, sizeof(struct gl_polygon_attrib) );
      newnode = new_attrib_node( GL_POLYGON_BIT );
      newnode->data = attr;
      newnode->next = head;
      head = newnode;
   }

   if (mask & GL_POLYGON_STIPPLE_BIT) {
      GLuint *stipple;
      stipple = (GLuint *) MALLOC( 32*sizeof(GLuint) );
      MEMCPY( stipple, ctx->PolygonStipple, 32*sizeof(GLuint) );
      newnode = new_attrib_node( GL_POLYGON_STIPPLE_BIT );
      newnode->data = stipple;
      newnode->next = head;
      head = newnode;
   }

   if (mask & GL_SCISSOR_BIT) {
      struct gl_scissor_attrib *attr;
      attr = MALLOC_STRUCT( gl_scissor_attrib );
      MEMCPY( attr, &ctx->Scissor, sizeof(struct gl_scissor_attrib) );
      newnode = new_attrib_node( GL_SCISSOR_BIT );
      newnode->data = attr;
      newnode->next = head;
      head = newnode;
   }

   if (mask & GL_STENCIL_BUFFER_BIT) {
      struct gl_stencil_attrib *attr;
      attr = MALLOC_STRUCT( gl_stencil_attrib );
      MEMCPY( attr, &ctx->Stencil, sizeof(struct gl_stencil_attrib) );
      newnode = new_attrib_node( GL_STENCIL_BUFFER_BIT );
      newnode->data = attr;
      newnode->next = head;
      head = newnode;
   }

   if (mask & GL_TEXTURE_BIT) {
      struct texture_state *texstate = CALLOC_STRUCT(texture_state);
      GLuint u;

      if (!texstate) {
         _mesa_error(ctx, GL_OUT_OF_MEMORY, "glPushAttrib(GL_TEXTURE_BIT)");
         goto end;
      }

      _mesa_lock_context_textures(ctx);

      /* copy/save the bulk of texture state here */
      _mesa_memcpy(&texstate->Texture, &ctx->Texture, sizeof(ctx->Texture));

      /* Save references to the currently bound texture objects so they don't
       * accidentally get deleted while referenced in the attribute stack.
       */
      for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
         _mesa_reference_texobj(&texstate->SavedTexRef[u][TEXTURE_1D_INDEX],
                                ctx->Texture.Unit[u].Current1D);
         _mesa_reference_texobj(&texstate->SavedTexRef[u][TEXTURE_2D_INDEX],
                                ctx->Texture.Unit[u].Current2D);
         _mesa_reference_texobj(&texstate->SavedTexRef[u][TEXTURE_3D_INDEX],
                                ctx->Texture.Unit[u].Current3D);
         _mesa_reference_texobj(&texstate->SavedTexRef[u][TEXTURE_CUBE_INDEX],
                                ctx->Texture.Unit[u].CurrentCubeMap);
         _mesa_reference_texobj(&texstate->SavedTexRef[u][TEXTURE_RECT_INDEX],
                                ctx->Texture.Unit[u].CurrentRect);
         _mesa_reference_texobj(&texstate->SavedTexRef[u][TEXTURE_1D_ARRAY_INDEX],
                                ctx->Texture.Unit[u].Current1DArray);
         _mesa_reference_texobj(&texstate->SavedTexRef[u][TEXTURE_2D_ARRAY_INDEX],
                                ctx->Texture.Unit[u].Current2DArray);
      }

      /* copy state/contents of the currently bound texture objects */
      for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
         _mesa_copy_texture_object(&texstate->SavedObj[u][TEXTURE_1D_INDEX],
                                   ctx->Texture.Unit[u].Current1D);
         _mesa_copy_texture_object(&texstate->SavedObj[u][TEXTURE_2D_INDEX],
                                   ctx->Texture.Unit[u].Current2D);
         _mesa_copy_texture_object(&texstate->SavedObj[u][TEXTURE_3D_INDEX],
                                   ctx->Texture.Unit[u].Current3D);
         _mesa_copy_texture_object(&texstate->SavedObj[u][TEXTURE_CUBE_INDEX],
                                   ctx->Texture.Unit[u].CurrentCubeMap);
         _mesa_copy_texture_object(&texstate->SavedObj[u][TEXTURE_RECT_INDEX],
                                   ctx->Texture.Unit[u].CurrentRect);
         _mesa_copy_texture_object(&texstate->SavedObj[u][TEXTURE_1D_ARRAY_INDEX],
                                   ctx->Texture.Unit[u].Current1DArray);
         _mesa_copy_texture_object(&texstate->SavedObj[u][TEXTURE_2D_ARRAY_INDEX],
                                   ctx->Texture.Unit[u].Current2DArray);
      }

      _mesa_unlock_context_textures(ctx);

      newnode = new_attrib_node( GL_TEXTURE_BIT );
      newnode->data = texstate;
      newnode->next = head;
      head = newnode;
   }

   if (mask & GL_TRANSFORM_BIT) {
      struct gl_transform_attrib *attr;
      attr = MALLOC_STRUCT( gl_transform_attrib );
      MEMCPY( attr, &ctx->Transform, sizeof(struct gl_transform_attrib) );
      newnode = new_attrib_node( GL_TRANSFORM_BIT );
      newnode->data = attr;
      newnode->next = head;
      head = newnode;
   }

   if (mask & GL_VIEWPORT_BIT) {
      struct gl_viewport_attrib *attr;
      attr = MALLOC_STRUCT( gl_viewport_attrib );
      MEMCPY( attr, &ctx->Viewport, sizeof(struct gl_viewport_attrib) );
      newnode = new_attrib_node( GL_VIEWPORT_BIT );
      newnode->data = attr;
      newnode->next = head;
      head = newnode;
   }

   /* GL_ARB_multisample */
   if (mask & GL_MULTISAMPLE_BIT_ARB) {
      struct gl_multisample_attrib *attr;
      attr = MALLOC_STRUCT( gl_multisample_attrib );
      MEMCPY( attr, &ctx->Multisample, sizeof(struct gl_multisample_attrib) );
      newnode = new_attrib_node( GL_MULTISAMPLE_BIT_ARB );
      newnode->data = attr;
      newnode->next = head;
      head = newnode;
   }

end:
   ctx->AttribStack[ctx->AttribStackDepth] = head;
   ctx->AttribStackDepth++;
}



static void
pop_enable_group(GLcontext *ctx, const struct gl_enable_attrib *enable)
{
   GLuint i;

#define TEST_AND_UPDATE(VALUE, NEWVALUE, ENUM)		\
	if ((VALUE) != (NEWVALUE)) {			\
	   _mesa_set_enable( ctx, ENUM, (NEWVALUE) );	\
	}

   TEST_AND_UPDATE(ctx->Color.AlphaEnabled, enable->AlphaTest, GL_ALPHA_TEST);
   TEST_AND_UPDATE(ctx->Color.BlendEnabled, enable->Blend, GL_BLEND);

   for (i=0;i<MAX_CLIP_PLANES;i++) {
      const GLuint mask = 1 << i;
      if ((ctx->Transform.ClipPlanesEnabled & mask) != (enable->ClipPlanes & mask))
	  _mesa_set_enable(ctx, (GLenum) (GL_CLIP_PLANE0 + i),
			   (GLboolean) ((enable->ClipPlanes & mask) ? GL_TRUE : GL_FALSE));
   }

   TEST_AND_UPDATE(ctx->Light.ColorMaterialEnabled, enable->ColorMaterial,
                   GL_COLOR_MATERIAL);
   TEST_AND_UPDATE(ctx->Pixel.ColorTableEnabled[COLORTABLE_PRECONVOLUTION],
                   enable->ColorTable[COLORTABLE_PRECONVOLUTION],
                   GL_COLOR_TABLE);
   TEST_AND_UPDATE(ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCONVOLUTION],
                   enable->ColorTable[COLORTABLE_POSTCONVOLUTION],
                   GL_POST_CONVOLUTION_COLOR_TABLE);
   TEST_AND_UPDATE(ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCOLORMATRIX],
                   enable->ColorTable[COLORTABLE_POSTCOLORMATRIX],
                   GL_POST_COLOR_MATRIX_COLOR_TABLE);
   TEST_AND_UPDATE(ctx->Polygon.CullFlag, enable->CullFace, GL_CULL_FACE);
   TEST_AND_UPDATE(ctx->Depth.Test, enable->DepthTest, GL_DEPTH_TEST);
   TEST_AND_UPDATE(ctx->Color.DitherFlag, enable->Dither, GL_DITHER);
   TEST_AND_UPDATE(ctx->Pixel.Convolution1DEnabled, enable->Convolution1D,
                   GL_CONVOLUTION_1D);
   TEST_AND_UPDATE(ctx->Pixel.Convolution2DEnabled, enable->Convolution2D,
                   GL_CONVOLUTION_2D);
   TEST_AND_UPDATE(ctx->Pixel.Separable2DEnabled, enable->Separable2D,
                   GL_SEPARABLE_2D);
   TEST_AND_UPDATE(ctx->Fog.Enabled, enable->Fog, GL_FOG);
   TEST_AND_UPDATE(ctx->Light.Enabled, enable->Lighting, GL_LIGHTING);
   TEST_AND_UPDATE(ctx->Line.SmoothFlag, enable->LineSmooth, GL_LINE_SMOOTH);
   TEST_AND_UPDATE(ctx->Line.StippleFlag, enable->LineStipple,
                   GL_LINE_STIPPLE);
   TEST_AND_UPDATE(ctx->Color.IndexLogicOpEnabled, enable->IndexLogicOp,
                   GL_INDEX_LOGIC_OP);
   TEST_AND_UPDATE(ctx->Color.ColorLogicOpEnabled, enable->ColorLogicOp,
                   GL_COLOR_LOGIC_OP);

   TEST_AND_UPDATE(ctx->Eval.Map1Color4, enable->Map1Color4, GL_MAP1_COLOR_4);
   TEST_AND_UPDATE(ctx->Eval.Map1Index, enable->Map1Index, GL_MAP1_INDEX);
   TEST_AND_UPDATE(ctx->Eval.Map1Normal, enable->Map1Normal, GL_MAP1_NORMAL);
   TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord1, enable->Map1TextureCoord1,
                   GL_MAP1_TEXTURE_COORD_1);
   TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord2, enable->Map1TextureCoord2,
                   GL_MAP1_TEXTURE_COORD_2);
   TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord3, enable->Map1TextureCoord3,
                   GL_MAP1_TEXTURE_COORD_3);
   TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord4, enable->Map1TextureCoord4,
                   GL_MAP1_TEXTURE_COORD_4);
   TEST_AND_UPDATE(ctx->Eval.Map1Vertex3, enable->Map1Vertex3,
                   GL_MAP1_VERTEX_3);
   TEST_AND_UPDATE(ctx->Eval.Map1Vertex4, enable->Map1Vertex4,
                   GL_MAP1_VERTEX_4);
   for (i = 0; i < 16; i++) {
      TEST_AND_UPDATE(ctx->Eval.Map1Attrib[i], enable->Map1Attrib[i],
                      GL_MAP1_VERTEX_ATTRIB0_4_NV + i);
   }

   TEST_AND_UPDATE(ctx->Eval.Map2Color4, enable->Map2Color4, GL_MAP2_COLOR_4);
   TEST_AND_UPDATE(ctx->Eval.Map2Index, enable->Map2Index, GL_MAP2_INDEX);
   TEST_AND_UPDATE(ctx->Eval.Map2Normal, enable->Map2Normal, GL_MAP2_NORMAL);
   TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord1, enable->Map2TextureCoord1,
                   GL_MAP2_TEXTURE_COORD_1);
   TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord2, enable->Map2TextureCoord2,
                   GL_MAP2_TEXTURE_COORD_2);
   TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord3, enable->Map2TextureCoord3,
                   GL_MAP2_TEXTURE_COORD_3);
   TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord4, enable->Map2TextureCoord4,
                   GL_MAP2_TEXTURE_COORD_4);
   TEST_AND_UPDATE(ctx->Eval.Map2Vertex3, enable->Map2Vertex3,
                   GL_MAP2_VERTEX_3);
   TEST_AND_UPDATE(ctx->Eval.Map2Vertex4, enable->Map2Vertex4,
                   GL_MAP2_VERTEX_4);
   for (i = 0; i < 16; i++) {
      TEST_AND_UPDATE(ctx->Eval.Map2Attrib[i], enable->Map2Attrib[i],
                      GL_MAP2_VERTEX_ATTRIB0_4_NV + i);
   }

   TEST_AND_UPDATE(ctx->Eval.AutoNormal, enable->AutoNormal, GL_AUTO_NORMAL);
   TEST_AND_UPDATE(ctx->Transform.Normalize, enable->Normalize, GL_NORMALIZE);
   TEST_AND_UPDATE(ctx->Transform.RescaleNormals, enable->RescaleNormals,
                   GL_RESCALE_NORMAL_EXT);
   TEST_AND_UPDATE(ctx->Transform.RasterPositionUnclipped,
                   enable->RasterPositionUnclipped,
                   GL_RASTER_POSITION_UNCLIPPED_IBM);
   TEST_AND_UPDATE(ctx->Point.SmoothFlag, enable->PointSmooth,
                   GL_POINT_SMOOTH);
   if (ctx->Extensions.NV_point_sprite || ctx->Extensions.ARB_point_sprite) {
      TEST_AND_UPDATE(ctx->Point.PointSprite, enable->PointSprite,
                      GL_POINT_SPRITE_NV);
   }
   TEST_AND_UPDATE(ctx->Polygon.OffsetPoint, enable->PolygonOffsetPoint,
                   GL_POLYGON_OFFSET_POINT);
   TEST_AND_UPDATE(ctx->Polygon.OffsetLine, enable->PolygonOffsetLine,
                   GL_POLYGON_OFFSET_LINE);
   TEST_AND_UPDATE(ctx->Polygon.OffsetFill, enable->PolygonOffsetFill,
                   GL_POLYGON_OFFSET_FILL);
   TEST_AND_UPDATE(ctx->Polygon.SmoothFlag, enable->PolygonSmooth,
                   GL_POLYGON_SMOOTH);
   TEST_AND_UPDATE(ctx->Polygon.StippleFlag, enable->PolygonStipple,
                   GL_POLYGON_STIPPLE);
   TEST_AND_UPDATE(ctx->Scissor.Enabled, enable->Scissor, GL_SCISSOR_TEST);
   TEST_AND_UPDATE(ctx->Stencil.Enabled, enable->Stencil, GL_STENCIL_TEST);
   if (ctx->Extensions.EXT_stencil_two_side) {
      TEST_AND_UPDATE(ctx->Stencil.TestTwoSide, enable->StencilTwoSide, GL_STENCIL_TEST_TWO_SIDE_EXT);
   }
   TEST_AND_UPDATE(ctx->Multisample.Enabled, enable->MultisampleEnabled,
                   GL_MULTISAMPLE_ARB);
   TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToCoverage,
                   enable->SampleAlphaToCoverage,
                   GL_SAMPLE_ALPHA_TO_COVERAGE_ARB);
   TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToOne,
                   enable->SampleAlphaToOne,
                   GL_SAMPLE_ALPHA_TO_ONE_ARB);
   TEST_AND_UPDATE(ctx->Multisample.SampleCoverage,
                   enable->SampleCoverage,
                   GL_SAMPLE_COVERAGE_ARB);
   TEST_AND_UPDATE(ctx->Multisample.SampleCoverageInvert,
                   enable->SampleCoverageInvert,
                   GL_SAMPLE_COVERAGE_INVERT_ARB);
   /* GL_ARB_vertex_program, GL_NV_vertex_program */
   TEST_AND_UPDATE(ctx->VertexProgram.Enabled,
                   enable->VertexProgram,
                   GL_VERTEX_PROGRAM_ARB);
   TEST_AND_UPDATE(ctx->VertexProgram.PointSizeEnabled,
                   enable->VertexProgramPointSize,
                   GL_VERTEX_PROGRAM_POINT_SIZE_ARB);
   TEST_AND_UPDATE(ctx->VertexProgram.TwoSideEnabled,
                   enable->VertexProgramTwoSide,
                   GL_VERTEX_PROGRAM_TWO_SIDE_ARB);

#undef TEST_AND_UPDATE