colortab.c

来自「mesa-6.5-minigui源码」· C语言 代码 · 共 1,446 行 · 第 1/4 页

            return;
         }
         texObj = ctx->Texture.ProxyCubeMap;
         table = &texObj->Palette;
         break;
      case GL_SHARED_TEXTURE_PALETTE_EXT:
         table = &ctx->Texture.Palette;
	 tableType = GL_FLOAT;
         break;
      case GL_COLOR_TABLE:
         table = &ctx->ColorTable;
	 tableType = GL_FLOAT;
         rScale = ctx->Pixel.ColorTableScale[0];
         gScale = ctx->Pixel.ColorTableScale[1];
         bScale = ctx->Pixel.ColorTableScale[2];
         aScale = ctx->Pixel.ColorTableScale[3];
         rBias = ctx->Pixel.ColorTableBias[0];
         gBias = ctx->Pixel.ColorTableBias[1];
         bBias = ctx->Pixel.ColorTableBias[2];
         aBias = ctx->Pixel.ColorTableBias[3];
         break;
      case GL_PROXY_COLOR_TABLE:
         table = &ctx->ProxyColorTable;
         proxy = GL_TRUE;
         break;
      case GL_TEXTURE_COLOR_TABLE_SGI:
         if (!ctx->Extensions.SGI_texture_color_table) {
            _mesa_error(ctx, GL_INVALID_ENUM, "glColorTable(target)");
            return;
         }
         table = &(texUnit->ColorTable);
	 tableType = GL_FLOAT;
         rScale = ctx->Pixel.TextureColorTableScale[0];
         gScale = ctx->Pixel.TextureColorTableScale[1];
         bScale = ctx->Pixel.TextureColorTableScale[2];
         aScale = ctx->Pixel.TextureColorTableScale[3];
         rBias = ctx->Pixel.TextureColorTableBias[0];
         gBias = ctx->Pixel.TextureColorTableBias[1];
         bBias = ctx->Pixel.TextureColorTableBias[2];
         aBias = ctx->Pixel.TextureColorTableBias[3];
         break;
      case GL_PROXY_TEXTURE_COLOR_TABLE_SGI:
         if (!ctx->Extensions.SGI_texture_color_table) {
            _mesa_error(ctx, GL_INVALID_ENUM, "glColorTable(target)");
            return;
         }
         table = &(texUnit->ProxyColorTable);
	 tableType = GL_FLOAT;
         proxy = GL_TRUE;
         break;
      case GL_POST_CONVOLUTION_COLOR_TABLE:
         table = &ctx->PostConvolutionColorTable;
	 tableType = GL_FLOAT;
         rScale = ctx->Pixel.PCCTscale[0];
         gScale = ctx->Pixel.PCCTscale[1];
         bScale = ctx->Pixel.PCCTscale[2];
         aScale = ctx->Pixel.PCCTscale[3];
         rBias = ctx->Pixel.PCCTbias[0];
         gBias = ctx->Pixel.PCCTbias[1];
         bBias = ctx->Pixel.PCCTbias[2];
         aBias = ctx->Pixel.PCCTbias[3];
         break;
      case GL_PROXY_POST_CONVOLUTION_COLOR_TABLE:
         table = &ctx->ProxyPostConvolutionColorTable;
	 tableType = GL_FLOAT;
         proxy = GL_TRUE;
         break;
      case GL_POST_COLOR_MATRIX_COLOR_TABLE:
         table = &ctx->PostColorMatrixColorTable;
	 tableType = GL_FLOAT;
         rScale = ctx->Pixel.PCMCTscale[0];
         gScale = ctx->Pixel.PCMCTscale[1];
         bScale = ctx->Pixel.PCMCTscale[2];
         aScale = ctx->Pixel.PCMCTscale[3];
         rBias = ctx->Pixel.PCMCTbias[0];
         gBias = ctx->Pixel.PCMCTbias[1];
         bBias = ctx->Pixel.PCMCTbias[2];
         aBias = ctx->Pixel.PCMCTbias[3];
         break;
      case GL_PROXY_POST_COLOR_MATRIX_COLOR_TABLE:
         table = &ctx->ProxyPostColorMatrixColorTable;
	 tableType = GL_FLOAT;
         proxy = GL_TRUE;
         break;
      default:
         _mesa_error(ctx, GL_INVALID_ENUM, "glColorTable(target)");
         return;
   }

   assert(table);

   if (!_mesa_is_legal_format_and_type(ctx, format, type) ||
       format == GL_INTENSITY) {
      _mesa_error(ctx, GL_INVALID_OPERATION, "glColorTable(format or type)");
      return;
   }

   baseFormat = base_colortab_format(internalFormat);
   if (baseFormat < 0) {
      _mesa_error(ctx, GL_INVALID_ENUM, "glColorTable(internalFormat)");
      return;
   }

   if (width < 0 || (width != 0 && _mesa_bitcount(width) != 1)) {
      /* error */
      if (proxy) {
         table->Size = 0;
         table->InternalFormat = (GLenum) 0;
         table->_BaseFormat = (GLenum) 0;
      }
      else {
         _mesa_error(ctx, GL_INVALID_VALUE, "glColorTable(width=%d)", width);
      }
      return;
   }

   if (width > (GLsizei) ctx->Const.MaxColorTableSize) {
      if (proxy) {
         table->Size = 0;
         table->InternalFormat = (GLenum) 0;
         table->_BaseFormat = (GLenum) 0;
      }
      else {
         _mesa_error(ctx, GL_TABLE_TOO_LARGE, "glColorTable(width)");
      }
      return;
   }

   table->Size = width;
   table->InternalFormat = internalFormat;
   table->_BaseFormat = (GLenum) baseFormat;
   table->Type = (tableType == GL_FLOAT) ? GL_FLOAT : CHAN_TYPE;

   comps = _mesa_components_in_format(table->_BaseFormat);
   assert(comps > 0);  /* error should have been caught sooner */

   if (!proxy) {
      /* free old table, if any */
      if (table->Table) {
         FREE(table->Table);
         table->Table = NULL;
      }

      if (width > 0) {
         if (table->Type == GL_FLOAT) {
	    table->Table = MALLOC(comps * width * sizeof(GLfloat));
	 }
	 else {
            table->Table = MALLOC(comps * width * sizeof(GLchan));
	 }

	 if (!table->Table) {
	    _mesa_error(ctx, GL_OUT_OF_MEMORY, "glColorTable");
	    return;
	 }

	 store_colortable_entries(ctx, table,
				  0, width,  /* start, count */
				  format, type, data,
				  rScale, rBias,
				  gScale, gBias,
				  bScale, bBias,
				  aScale, aBias);
      }
   } /* proxy */

   /* do this after the table's Type and Format are set */
   set_component_sizes(table);

   if (texObj || target == GL_SHARED_TEXTURE_PALETTE_EXT) {
      /* texture object palette, texObj==NULL means the shared palette */
      if (ctx->Driver.UpdateTexturePalette) {
         (*ctx->Driver.UpdateTexturePalette)( ctx, texObj );
      }
   }

   ctx->NewState |= _NEW_PIXEL;
}



void GLAPIENTRY
_mesa_ColorSubTable( GLenum target, GLsizei start,
                     GLsizei count, GLenum format, GLenum type,
                     const GLvoid *data )
{
   GET_CURRENT_CONTEXT(ctx);
   struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
   struct gl_texture_object *texObj = NULL;
   struct gl_color_table *table = NULL;
   GLfloat rScale = 1.0, gScale = 1.0, bScale = 1.0, aScale = 1.0;
   GLfloat rBias  = 0.0, gBias  = 0.0, bBias  = 0.0, aBias  = 0.0;
   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);

   switch (target) {
      case GL_TEXTURE_1D:
         texObj = texUnit->Current1D;
         table = &texObj->Palette;
         break;
      case GL_TEXTURE_2D:
         texObj = texUnit->Current2D;
         table = &texObj->Palette;
         break;
      case GL_TEXTURE_3D:
         texObj = texUnit->Current3D;
         table = &texObj->Palette;
         break;
      case GL_TEXTURE_CUBE_MAP_ARB:
         if (!ctx->Extensions.ARB_texture_cube_map) {
            _mesa_error(ctx, GL_INVALID_ENUM, "glColorSubTable(target)");
            return;
         }
         texObj = texUnit->CurrentCubeMap;
         table = &texObj->Palette;
         break;
      case GL_SHARED_TEXTURE_PALETTE_EXT:
         table = &ctx->Texture.Palette;
         break;
      case GL_COLOR_TABLE:
         table = &ctx->ColorTable;
         rScale = ctx->Pixel.ColorTableScale[0];
         gScale = ctx->Pixel.ColorTableScale[1];
         bScale = ctx->Pixel.ColorTableScale[2];
         aScale = ctx->Pixel.ColorTableScale[3];
         rBias = ctx->Pixel.ColorTableBias[0];
         gBias = ctx->Pixel.ColorTableBias[1];
         bBias = ctx->Pixel.ColorTableBias[2];
         aBias = ctx->Pixel.ColorTableBias[3];
         break;
      case GL_TEXTURE_COLOR_TABLE_SGI:
         if (!ctx->Extensions.SGI_texture_color_table) {
            _mesa_error(ctx, GL_INVALID_ENUM, "glColorSubTable(target)");
            return;
         }
         table = &(texUnit->ColorTable);
         rScale = ctx->Pixel.TextureColorTableScale[0];
         gScale = ctx->Pixel.TextureColorTableScale[1];
         bScale = ctx->Pixel.TextureColorTableScale[2];
         aScale = ctx->Pixel.TextureColorTableScale[3];
         rBias = ctx->Pixel.TextureColorTableBias[0];
         gBias = ctx->Pixel.TextureColorTableBias[1];
         bBias = ctx->Pixel.TextureColorTableBias[2];
         aBias = ctx->Pixel.TextureColorTableBias[3];
         break;
      case GL_POST_CONVOLUTION_COLOR_TABLE:
         table = &ctx->PostConvolutionColorTable;
         rScale = ctx->Pixel.PCCTscale[0];
         gScale = ctx->Pixel.PCCTscale[1];
         bScale = ctx->Pixel.PCCTscale[2];
         aScale = ctx->Pixel.PCCTscale[3];
         rBias = ctx->Pixel.PCCTbias[0];
         gBias = ctx->Pixel.PCCTbias[1];
         bBias = ctx->Pixel.PCCTbias[2];
         aBias = ctx->Pixel.PCCTbias[3];
         break;
      case GL_POST_COLOR_MATRIX_COLOR_TABLE:
         table = &ctx->PostColorMatrixColorTable;
         rScale = ctx->Pixel.PCMCTscale[0];
         gScale = ctx->Pixel.PCMCTscale[1];
         bScale = ctx->Pixel.PCMCTscale[2];
         aScale = ctx->Pixel.PCMCTscale[3];
         rBias = ctx->Pixel.PCMCTbias[0];
         gBias = ctx->Pixel.PCMCTbias[1];
         bBias = ctx->Pixel.PCMCTbias[2];
         aBias = ctx->Pixel.PCMCTbias[3];
         break;
      default:
         _mesa_error(ctx, GL_INVALID_ENUM, "glColorSubTable(target)");
         return;
   }

   assert(table);

   if (!_mesa_is_legal_format_and_type(ctx, format, type) ||
       format == GL_INTENSITY) {
      _mesa_error(ctx, GL_INVALID_OPERATION, "glColorSubTable(format or type)");
      return;
   }

   if (count < 1) {
      _mesa_error(ctx, GL_INVALID_VALUE, "glColorSubTable(count)");
      return;
   }

   /* error should have been caught sooner */
   assert(_mesa_components_in_format(table->_BaseFormat) > 0);

   if (start + count > (GLint) table->Size) {
      _mesa_error(ctx, GL_INVALID_VALUE, "glColorSubTable(count)");
      return;
   }

   if (!table->Table) {
      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glColorSubTable");
      return;
   }

   store_colortable_entries(ctx, table, start, count,
			    format, type, data,
			    rScale, rBias,
			    gScale, gBias,
			    bScale, bBias,
			    aScale, aBias);

   if (texObj || target == GL_SHARED_TEXTURE_PALETTE_EXT) {
      /* per-texture object palette */
      if (ctx->Driver.UpdateTexturePalette) {
         (*ctx->Driver.UpdateTexturePalette)( ctx, texObj );
      }
   }

   ctx->NewState |= _NEW_PIXEL;
}



void GLAPIENTRY
_mesa_CopyColorTable(GLenum target, GLenum internalformat,
                     GLint x, GLint y, GLsizei width)
{
   GET_CURRENT_CONTEXT(ctx);
   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);

   /* Select buffer to read from */
   ctx->Driver.CopyColorTable( ctx, target, internalformat, x, y, width );
}



void GLAPIENTRY
_mesa_CopyColorSubTable(GLenum target, GLsizei start,
                        GLint x, GLint y, GLsizei width)
{
   GET_CURRENT_CONTEXT(ctx);
   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);

   ctx->Driver.CopyColorSubTable( ctx, target, start, x, y, width );
}



void GLAPIENTRY
_mesa_GetColorTable( GLenum target, GLenum format,
                     GLenum type, GLvoid *data )
{
   GET_CURRENT_CONTEXT(ctx);
   struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
   struct gl_color_table *table = NULL;
   GLchan rgba[MAX_COLOR_TABLE_SIZE][4];
   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);

   if (ctx->NewState) {
      _mesa_update_state(ctx);
   }

   switch (target) {
      case GL_TEXTURE_1D:
         table = &texUnit->Current1D->Palette;
         break;
      case GL_TEXTURE_2D:
         table = &texUnit->Current2D->Palette;
         break;