attrib.c

winNT技术操作系统,国外开放的原代码和LIUX一样

                       unit->Combine.ModeRGB);
         _mesa_TexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA,
                       unit->Combine.ModeA);
         _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB,
                       unit->Combine.SourceRGB[0]);
         _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB,
                       unit->Combine.SourceRGB[1]);
         _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB,
                       unit->Combine.SourceRGB[2]);
         _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA,
                       unit->Combine.SourceA[0]);
         _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA,
                       unit->Combine.SourceA[1]);
         _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_ALPHA,
                       unit->Combine.SourceA[2]);
         _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB,
                       unit->Combine.OperandRGB[0]);
         _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB,
                       unit->Combine.OperandRGB[1]);
         _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB,
                       unit->Combine.OperandRGB[2]);
         _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA,
                       unit->Combine.OperandA[0]);
         _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA,
                       unit->Combine.OperandA[1]);
         _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_ALPHA,
                       unit->Combine.OperandA[2]);
         _mesa_TexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE,
                       1 << unit->Combine.ScaleShiftRGB);
         _mesa_TexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE,
                       1 << unit->Combine.ScaleShiftA);
      }

      /* Restore texture object state */
      for (i = 0; i < NUM_TEXTURE_TARGETS; i++) {
         GLenum target = 0;
         const struct gl_texture_object *obj = NULL;
         GLfloat bordColor[4];

         switch (i) {
         case 0:
            target = GL_TEXTURE_1D;
            obj = &unit->Saved1D;
            break;
         case 1:
            target = GL_TEXTURE_2D;
            obj = &unit->Saved2D;
            break;
         case 2:
            target = GL_TEXTURE_3D;
            obj = &unit->Saved3D;
            break;
         case 3:
            if (!ctx->Extensions.ARB_texture_cube_map)
               continue;
            target = GL_TEXTURE_CUBE_MAP_ARB;
            obj = &unit->SavedCubeMap;
            break;
         case 4:
            if (!ctx->Extensions.NV_texture_rectangle)
               continue;
            target = GL_TEXTURE_RECTANGLE_NV;
            obj = &unit->SavedRect;
            break;
         default:
            ; /* silence warnings */
         }

         _mesa_BindTexture(target, obj->Name);

         bordColor[0] = CHAN_TO_FLOAT(obj->BorderColor[0]);
         bordColor[1] = CHAN_TO_FLOAT(obj->BorderColor[1]);
         bordColor[2] = CHAN_TO_FLOAT(obj->BorderColor[2]);
         bordColor[3] = CHAN_TO_FLOAT(obj->BorderColor[3]);

         _mesa_TexParameterf(target, GL_TEXTURE_PRIORITY, obj->Priority);
         _mesa_TexParameterfv(target, GL_TEXTURE_BORDER_COLOR, bordColor);
         _mesa_TexParameteri(target, GL_TEXTURE_WRAP_S, obj->WrapS);
         _mesa_TexParameteri(target, GL_TEXTURE_WRAP_T, obj->WrapT);
         _mesa_TexParameteri(target, GL_TEXTURE_WRAP_R, obj->WrapR);
         _mesa_TexParameteri(target, GL_TEXTURE_MIN_FILTER, obj->MinFilter);
         _mesa_TexParameteri(target, GL_TEXTURE_MAG_FILTER, obj->MagFilter);
         _mesa_TexParameterf(target, GL_TEXTURE_MIN_LOD, obj->MinLod);
         _mesa_TexParameterf(target, GL_TEXTURE_MAX_LOD, obj->MaxLod);
         _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, obj->BaseLevel);
         _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, obj->MaxLevel);
         if (ctx->Extensions.EXT_texture_filter_anisotropic) {
            _mesa_TexParameterf(target, GL_TEXTURE_MAX_ANISOTROPY_EXT,
                                obj->MaxAnisotropy);
         }
         if (ctx->Extensions.SGIX_shadow) {
            _mesa_TexParameteri(target, GL_TEXTURE_COMPARE_SGIX,
                                obj->CompareFlag);
            _mesa_TexParameteri(target, GL_TEXTURE_COMPARE_OPERATOR_SGIX,
                                obj->CompareOperator);
         }
         if (ctx->Extensions.SGIX_shadow_ambient) {
            _mesa_TexParameterf(target, GL_SHADOW_AMBIENT_SGIX,
                                obj->ShadowAmbient);
         }

      }
   }
   _mesa_ActiveTextureARB(GL_TEXTURE0_ARB
                          + texAttrib->CurrentUnit);

   /* "un-bump" the texture object reference counts.  We did that so they
    * wouldn't inadvertantly get deleted while they were still referenced
    * inside the attribute state stack.
    */
   for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
      ctx->Texture.Unit[u].Current1D->RefCount--;
      ctx->Texture.Unit[u].Current2D->RefCount--;
      ctx->Texture.Unit[u].Current3D->RefCount--;
      ctx->Texture.Unit[u].CurrentCubeMap->RefCount--;
      ctx->Texture.Unit[u].CurrentRect->RefCount--;
   }
}


/*
 * This function is kind of long just because we have to call a lot
 * of device driver functions to update device driver state.
 *
 * XXX As it is now, most of the pop-code calls immediate-mode Mesa functions
 * in order to restore GL state.  This isn't terribly efficient but it
 * ensures that dirty flags and any derived state gets updated correctly.
 * We could at least check if the value to restore equals the current value
 * and then skip the Mesa call.
 */
void GLAPIENTRY
_mesa_PopAttrib(void)
{
   struct gl_attrib_node *attr, *next;
   GET_CURRENT_CONTEXT(ctx);
   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);

   if (ctx->AttribStackDepth == 0) {
      _mesa_error( ctx, GL_STACK_UNDERFLOW, "glPopAttrib" );
      return;
   }

   ctx->AttribStackDepth--;
   attr = ctx->AttribStack[ctx->AttribStackDepth];

   while (attr) {

      if (MESA_VERBOSE & VERBOSE_API) {
         _mesa_debug(ctx, "glPopAttrib %s\n",
                     _mesa_lookup_enum_by_nr(attr->kind));
      }

      switch (attr->kind) {
         case GL_ACCUM_BUFFER_BIT:
            {
               const struct gl_accum_attrib *accum;
               accum = (const struct gl_accum_attrib *) attr->data;
               _mesa_ClearAccum(accum->ClearColor[0],
                                accum->ClearColor[1],
                                accum->ClearColor[2],
                                accum->ClearColor[3]);
            }
            break;
         case GL_COLOR_BUFFER_BIT:
            {
               const struct gl_colorbuffer_attrib *color;
               color = (const struct gl_colorbuffer_attrib *) attr->data;
               _mesa_ClearIndex((GLfloat) color->ClearIndex);
               _mesa_ClearColor(color->ClearColor[0],
                                color->ClearColor[1],
                                color->ClearColor[2],
                                color->ClearColor[3]);
               _mesa_IndexMask(color->IndexMask);
               _mesa_ColorMask((GLboolean) (color->ColorMask[0] != 0),
                               (GLboolean) (color->ColorMask[1] != 0),
                               (GLboolean) (color->ColorMask[2] != 0),
                               (GLboolean) (color->ColorMask[3] != 0));
#if 0
               _mesa_DrawBuffersARB(ctx->Const.MaxDrawBuffers,
                                    color->DrawBuffer);
#else
               _mesa_drawbuffers(ctx, ctx->Const.MaxDrawBuffers,
                                 color->DrawBuffer, NULL);
#endif
               _mesa_set_enable(ctx, GL_ALPHA_TEST, color->AlphaEnabled);
               _mesa_AlphaFunc(color->AlphaFunc, color->AlphaRef);
               _mesa_set_enable(ctx, GL_BLEND, color->BlendEnabled);
               _mesa_BlendFuncSeparateEXT(color->BlendSrcRGB,
                                          color->BlendDstRGB,
                                          color->BlendSrcA,
                                          color->BlendDstA);
	       /* This special case is because glBlendEquationSeparateEXT
		* cannot take GL_LOGIC_OP as a parameter.
		*/
	       if ( color->BlendEquationRGB == color->BlendEquationA ) {
		  _mesa_BlendEquation(color->BlendEquationRGB);
	       }
	       else {
		  _mesa_BlendEquationSeparateEXT(color->BlendEquationRGB,
						 color->BlendEquationA);
	       }
               _mesa_BlendColor(color->BlendColor[0],
                                color->BlendColor[1],
                                color->BlendColor[2],
                                color->BlendColor[3]);
               _mesa_LogicOp(color->LogicOp);
               _mesa_set_enable(ctx, GL_COLOR_LOGIC_OP,
                                color->ColorLogicOpEnabled);
               _mesa_set_enable(ctx, GL_INDEX_LOGIC_OP,
                                color->IndexLogicOpEnabled);
               _mesa_set_enable(ctx, GL_DITHER, color->DitherFlag);
            }
            break;
         case GL_CURRENT_BIT:
	    FLUSH_CURRENT( ctx, 0 );
            MEMCPY( &ctx->Current, attr->data,
		    sizeof(struct gl_current_attrib) );
            break;
         case GL_DEPTH_BUFFER_BIT:
            {
               const struct gl_depthbuffer_attrib *depth;
               depth = (const struct gl_depthbuffer_attrib *) attr->data;
               _mesa_DepthFunc(depth->Func);
               _mesa_ClearDepth(depth->Clear);
               _mesa_set_enable(ctx, GL_DEPTH_TEST, depth->Test);
               _mesa_DepthMask(depth->Mask);
               if (ctx->Extensions.HP_occlusion_test)
                  _mesa_set_enable(ctx, GL_OCCLUSION_TEST_HP,
                                   depth->OcclusionTest);
            }
            break;
         case GL_ENABLE_BIT:
            {
               const struct gl_enable_attrib *enable;
               enable = (const struct gl_enable_attrib *) attr->data;
               pop_enable_group(ctx, enable);
	       ctx->NewState |= _NEW_ALL;
            }
            break;
         case GL_EVAL_BIT:
            MEMCPY( &ctx->Eval, attr->data, sizeof(struct gl_eval_attrib) );
	    ctx->NewState |= _NEW_EVAL;
            break;
         case GL_FOG_BIT:
            {
               const struct gl_fog_attrib *fog;
               fog = (const struct gl_fog_attrib *) attr->data;
               _mesa_set_enable(ctx, GL_FOG, fog->Enabled);
               _mesa_Fogfv(GL_FOG_COLOR, fog->Color);
               _mesa_Fogf(GL_FOG_DENSITY, fog->Density);
               _mesa_Fogf(GL_FOG_START, fog->Start);
               _mesa_Fogf(GL_FOG_END, fog->End);
               _mesa_Fogf(GL_FOG_INDEX, fog->Index);
               _mesa_Fogi(GL_FOG_MODE, fog->Mode);
            }
            break;
         case GL_HINT_BIT:
            {
               const struct gl_hint_attrib *hint;
               hint = (const struct gl_hint_attrib *) attr->data;
               _mesa_Hint(GL_PERSPECTIVE_CORRECTION_HINT,
                          hint->PerspectiveCorrection );
               _mesa_Hint(GL_POINT_SMOOTH_HINT, hint->PointSmooth);
               _mesa_Hint(GL_LINE_SMOOTH_HINT, hint->LineSmooth);
               _mesa_Hint(GL_POLYGON_SMOOTH_HINT, hint->PolygonSmooth);
               _mesa_Hint(GL_FOG_HINT, hint->Fog);
               _mesa_Hint(GL_CLIP_VOLUME_CLIPPING_HINT_EXT,
                          hint->ClipVolumeClipping);
               if (ctx->Extensions.ARB_texture_compression)
                  _mesa_Hint(GL_TEXTURE_COMPRESSION_HINT_ARB,
                             hint->TextureCompression);
            }
            break;
         case GL_LIGHTING_BIT:
            {
               GLuint i;
               const struct gl_light_attrib *light;
               light = (const struct gl_light_attrib *) attr->data;
               /* lighting enable */
               _mesa_set_enable(ctx, GL_LIGHTING, light->Enabled);
               /* per-light state */
               if (_math_matrix_is_dirty(ctx->ModelviewMatrixStack.Top))
                  _math_matrix_analyse( ctx->ModelviewMatrixStack.Top );
	       
               for (i = 0; i < MAX_LIGHTS; i++) {
                  GLenum lgt = (GLenum) (GL_LIGHT0 + i);
		  const struct gl_light *l = &light->Light[i];
		  GLfloat tmp[4];
                  _mesa_set_enable(ctx, lgt, l->Enabled);
		  _mesa_Lightfv( lgt, GL_AMBIENT, l->Ambient );
		  _mesa_Lightfv( lgt, GL_DIFFUSE, l->Diffuse );
		  _mesa_Lightfv( lgt, GL_SPECULAR, l->Specular );
		  TRANSFORM_POINT( tmp, ctx->ModelviewMatrixStack.Top->inv, l->EyePosition );
		  _mesa_Lightfv( lgt, GL_POSITION, tmp );
		  TRANSFORM_POINT( tmp, ctx->ModelviewMatrixStack.Top->m, l->EyeDirection );
		  _mesa_Lightfv( lgt, GL_SPOT_DIRECTION, tmp );
		  _mesa_Lightfv( lgt, GL_SPOT_EXPONENT, &l->SpotExponent );
		  _mesa_Lightfv( lgt, GL_SPOT_CUTOFF, &l->SpotCutoff );
		  _mesa_Lightfv( lgt, GL_CONSTANT_ATTENUATION, 
				 &l->ConstantAttenuation );
		  _mesa_Lightfv( lgt, GL_LINEAR_ATTENUATION, 
				 &l->LinearAttenuation );
		  _mesa_Lightfv( lgt, GL_QUADRATIC_ATTENUATION, 
				 &l->QuadraticAttenuation );
               }
               /* light model */
               _mesa_LightModelfv(GL_LIGHT_MODEL_AMBIENT,
                                  light->Model.Ambient);
               _mesa_LightModelf(GL_LIGHT_MODEL_LOCAL_VIEWER,
                                 (GLfloat) light->Model.LocalViewer);
               _mesa_LightModelf(GL_LIGHT_MODEL_TWO_SIDE,
                                 (GLfloat) light->Model.TwoSide);
               _mesa_LightModelf(GL_LIGHT_MODEL_COLOR_CONTROL,
                                 (GLfloat) light->Model.ColorControl);
               /* materials */
               MEMCPY(&ctx->Light.Material, &light->Material,
                      sizeof(struct gl_material));
               /* shade model */
               _mesa_ShadeModel(light->ShadeModel);
               /* color material */
               _mesa_ColorMaterial(light->ColorMaterialFace,
                                   light->ColorMaterialMode);
               _mesa_set_enable(ctx, GL_COLOR_MATERIAL,
                                light->ColorMaterialEnabled);
            }
            break;
         case GL_LINE_BIT:
            {
               const struct gl_line_attrib *line;
               line = (const struct gl_line_attrib *) attr->data;
               _mesa_set_enable(ctx, GL_LINE_SMOOTH, line->SmoothFlag);
               _mesa_set_enable(ctx, GL_LINE_STIPPLE, line->StippleFlag);
               _mesa_LineStipple(line->StippleFactor, line->StipplePattern);