attrib.c

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

/*
 * Mesa 3-D graphics library
 * Version:  7.2
 *
 * Copyright (C) 1999-2008  Brian Paul   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.
 */

#include "glheader.h"
#include "imports.h"
#include "accum.h"
#include "arrayobj.h"
#include "attrib.h"
#include "blend.h"
#include "buffers.h"
#include "bufferobj.h"
#include "colormac.h"
#include "colortab.h"
#include "context.h"
#include "depth.h"
#include "enable.h"
#include "enums.h"
#include "fog.h"
#include "hint.h"
#include "light.h"
#include "lines.h"
#include "matrix.h"
#include "points.h"
#include "polygon.h"
#include "simple_list.h"
#include "stencil.h"
#include "texobj.h"
#include "texstate.h"
#include "varray.h"
#include "mtypes.h"
#include "math/m_xform.h"

/**
 * Special struct for saving/restoring texture state (GL_TEXTURE_BIT)
 */
struct texture_state
{
   struct gl_texture_attrib Texture;  /**< The usual context state */

   /** to save per texture object state (wrap modes, filters, etc): */
   struct gl_texture_object SavedObj[MAX_TEXTURE_UNITS][NUM_TEXTURE_TARGETS];

   /**
    * To save references to texture objects (so they don't get accidentally
    * deleted while saved in the attribute stack).
    */
   struct gl_texture_object *SavedTexRef[MAX_TEXTURE_UNITS][NUM_TEXTURE_TARGETS];
};


/**
 * Allocate a new attribute state node.  These nodes have a
 * "kind" value and a pointer to a struct of state data.
 */
static struct gl_attrib_node *
new_attrib_node( GLbitfield kind )
{
   struct gl_attrib_node *an = MALLOC_STRUCT(gl_attrib_node);
   if (an) {
      an->kind = kind;
   }
   return an;
}


void GLAPIENTRY
_mesa_PushAttrib(GLbitfield mask)
{
   struct gl_attrib_node *newnode;
   struct gl_attrib_node *head;

   GET_CURRENT_CONTEXT(ctx);
   ASSERT_OUTSIDE_BEGIN_END(ctx);

   if (MESA_VERBOSE & VERBOSE_API)
      _mesa_debug(ctx, "glPushAttrib %x\n", (int) mask);

   if (ctx->AttribStackDepth >= MAX_ATTRIB_STACK_DEPTH) {
      _mesa_error( ctx, GL_STACK_OVERFLOW, "glPushAttrib" );
      return;
   }

   /* Build linked list of attribute nodes which save all attribute */
   /* groups specified by the mask. */
   head = NULL;

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

   if (mask & GL_COLOR_BUFFER_BIT) {
      GLuint i;
      struct gl_colorbuffer_attrib *attr;
      attr = MALLOC_STRUCT( gl_colorbuffer_attrib );
      MEMCPY( attr, &ctx->Color, sizeof(struct gl_colorbuffer_attrib) );
      /* push the Draw FBO's DrawBuffer[] state, not ctx->Color.DrawBuffer[] */
      for (i = 0; i < ctx->Const.MaxDrawBuffers; i ++)
         attr->DrawBuffer[i] = ctx->DrawBuffer->ColorDrawBuffer[i];
      newnode = new_attrib_node( GL_COLOR_BUFFER_BIT );
      newnode->data = attr;
      newnode->next = head;
      head = newnode;
   }

   if (mask & GL_CURRENT_BIT) {
      struct gl_current_attrib *attr;
      FLUSH_CURRENT( ctx, 0 );
      attr = MALLOC_STRUCT( gl_current_attrib );
      MEMCPY( attr, &ctx->Current, sizeof(struct gl_current_attrib) );
      newnode = new_attrib_node( GL_CURRENT_BIT );
      newnode->data = attr;
      newnode->next = head;
      head = newnode;
   }

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

   if (mask & GL_ENABLE_BIT) {
      struct gl_enable_attrib *attr;
      GLuint i;
      attr = MALLOC_STRUCT( gl_enable_attrib );
      /* Copy enable flags from all other attributes into the enable struct. */
      attr->AlphaTest = ctx->Color.AlphaEnabled;
      attr->AutoNormal = ctx->Eval.AutoNormal;
      attr->Blend = ctx->Color.BlendEnabled;
      attr->ClipPlanes = ctx->Transform.ClipPlanesEnabled;
      attr->ColorMaterial = ctx->Light.ColorMaterialEnabled;
      for (i = 0; i < COLORTABLE_MAX; i++) {
         attr->ColorTable[i] = ctx->Pixel.ColorTableEnabled[i];
      }
      attr->Convolution1D = ctx->Pixel.Convolution1DEnabled;
      attr->Convolution2D = ctx->Pixel.Convolution2DEnabled;
      attr->Separable2D = ctx->Pixel.Separable2DEnabled;
      attr->CullFace = ctx->Polygon.CullFlag;
      attr->DepthTest = ctx->Depth.Test;
      attr->Dither = ctx->Color.DitherFlag;
      attr->Fog = ctx->Fog.Enabled;
      for (i = 0; i < ctx->Const.MaxLights; i++) {
         attr->Light[i] = ctx->Light.Light[i].Enabled;
      }
      attr->Lighting = ctx->Light.Enabled;
      attr->LineSmooth = ctx->Line.SmoothFlag;
      attr->LineStipple = ctx->Line.StippleFlag;
      attr->Histogram = ctx->Pixel.HistogramEnabled;
      attr->MinMax = ctx->Pixel.MinMaxEnabled;
      attr->IndexLogicOp = ctx->Color.IndexLogicOpEnabled;
      attr->ColorLogicOp = ctx->Color.ColorLogicOpEnabled;
      attr->Map1Color4 = ctx->Eval.Map1Color4;
      attr->Map1Index = ctx->Eval.Map1Index;
      attr->Map1Normal = ctx->Eval.Map1Normal;
      attr->Map1TextureCoord1 = ctx->Eval.Map1TextureCoord1;
      attr->Map1TextureCoord2 = ctx->Eval.Map1TextureCoord2;
      attr->Map1TextureCoord3 = ctx->Eval.Map1TextureCoord3;
      attr->Map1TextureCoord4 = ctx->Eval.Map1TextureCoord4;
      attr->Map1Vertex3 = ctx->Eval.Map1Vertex3;
      attr->Map1Vertex4 = ctx->Eval.Map1Vertex4;
      MEMCPY(attr->Map1Attrib, ctx->Eval.Map1Attrib, sizeof(ctx->Eval.Map1Attrib));
      attr->Map2Color4 = ctx->Eval.Map2Color4;
      attr->Map2Index = ctx->Eval.Map2Index;
      attr->Map2Normal = ctx->Eval.Map2Normal;
      attr->Map2TextureCoord1 = ctx->Eval.Map2TextureCoord1;
      attr->Map2TextureCoord2 = ctx->Eval.Map2TextureCoord2;
      attr->Map2TextureCoord3 = ctx->Eval.Map2TextureCoord3;
      attr->Map2TextureCoord4 = ctx->Eval.Map2TextureCoord4;
      attr->Map2Vertex3 = ctx->Eval.Map2Vertex3;
      attr->Map2Vertex4 = ctx->Eval.Map2Vertex4;
      MEMCPY(attr->Map2Attrib, ctx->Eval.Map2Attrib, sizeof(ctx->Eval.Map2Attrib));
      attr->Normalize = ctx->Transform.Normalize;
      attr->RasterPositionUnclipped = ctx->Transform.RasterPositionUnclipped;
      attr->PointSmooth = ctx->Point.SmoothFlag;
      attr->PointSprite = ctx->Point.PointSprite;
      attr->PolygonOffsetPoint = ctx->Polygon.OffsetPoint;
      attr->PolygonOffsetLine = ctx->Polygon.OffsetLine;
      attr->PolygonOffsetFill = ctx->Polygon.OffsetFill;
      attr->PolygonSmooth = ctx->Polygon.SmoothFlag;
      attr->PolygonStipple = ctx->Polygon.StippleFlag;
      attr->RescaleNormals = ctx->Transform.RescaleNormals;
      attr->Scissor = ctx->Scissor.Enabled;
      attr->Stencil = ctx->Stencil.Enabled;
      attr->StencilTwoSide = ctx->Stencil.TestTwoSide;
      attr->MultisampleEnabled = ctx->Multisample.Enabled;
      attr->SampleAlphaToCoverage = ctx->Multisample.SampleAlphaToCoverage;
      attr->SampleAlphaToOne = ctx->Multisample.SampleAlphaToOne;
      attr->SampleCoverage = ctx->Multisample.SampleCoverage;
      attr->SampleCoverageInvert = ctx->Multisample.SampleCoverageInvert;
      for (i=0; i<MAX_TEXTURE_UNITS; i++) {
         attr->Texture[i] = ctx->Texture.Unit[i].Enabled;
         attr->TexGen[i] = ctx->Texture.Unit[i].TexGenEnabled;
         attr->TextureColorTable[i] = ctx->Texture.Unit[i].ColorTableEnabled;
      }
      /* GL_NV_vertex_program */
      attr->VertexProgram = ctx->VertexProgram.Enabled;
      attr->VertexProgramPointSize = ctx->VertexProgram.PointSizeEnabled;
      attr->VertexProgramTwoSide = ctx->VertexProgram.TwoSideEnabled;
      newnode = new_attrib_node( GL_ENABLE_BIT );
      newnode->data = attr;
      newnode->next = head;
      head = newnode;
   }

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

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

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

   if (mask & GL_LIGHTING_BIT) {
      struct gl_light_attrib *attr;
      FLUSH_CURRENT(ctx, 0);	/* flush material changes */
      attr = MALLOC_STRUCT( gl_light_attrib );
      MEMCPY( attr, &ctx->Light, sizeof(struct gl_light_attrib) );
      newnode = new_attrib_node( GL_LIGHTING_BIT );
      newnode->data = attr;
      newnode->next = head;
      head = newnode;
   }

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

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

   if (mask & GL_PIXEL_MODE_BIT) {
      struct gl_pixel_attrib *attr;
      attr = MALLOC_STRUCT( gl_pixel_attrib );
      MEMCPY( attr, &ctx->Pixel, sizeof(struct gl_pixel_attrib) );