colortab.c

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

      case GL_TEXTURE_3D:
         table = &texUnit->Current3D->Palette;
         break;
      case GL_TEXTURE_CUBE_MAP_ARB:
         if (!ctx->Extensions.ARB_texture_cube_map) {
            _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTable(target)");
            return;
         }
         table = &texUnit->CurrentCubeMap->Palette;
         break;
      case GL_SHARED_TEXTURE_PALETTE_EXT:
         table = &ctx->Texture.Palette;
         break;
      case GL_COLOR_TABLE:
         table = &ctx->ColorTable;
         break;
      case GL_TEXTURE_COLOR_TABLE_SGI:
         if (!ctx->Extensions.SGI_texture_color_table) {
            _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTable(target)");
            return;
         }
         table = &(texUnit->ColorTable);
         break;
      case GL_POST_CONVOLUTION_COLOR_TABLE:
         table = &ctx->PostConvolutionColorTable;
         break;
      case GL_POST_COLOR_MATRIX_COLOR_TABLE:
         table = &ctx->PostColorMatrixColorTable;
         break;
      default:
         _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTable(target)");
         return;
   }

   ASSERT(table);

   switch (table->_BaseFormat) {
      case GL_ALPHA:
         if (table->Type == GL_FLOAT) {
            const GLfloat *tableF = (const GLfloat *) table->Table;
            GLuint i;
            for (i = 0; i < table->Size; i++) {
               rgba[i][RCOMP] = 0;
               rgba[i][GCOMP] = 0;
               rgba[i][BCOMP] = 0;
               rgba[i][ACOMP] = IROUND_POS(tableF[i] * CHAN_MAXF);
            }
         }
         else {
            const GLchan *tableUB = (const GLchan *) table->Table;
            GLuint i;
            for (i = 0; i < table->Size; i++) {
               rgba[i][RCOMP] = 0;
               rgba[i][GCOMP] = 0;
               rgba[i][BCOMP] = 0;
               rgba[i][ACOMP] = tableUB[i];
            }
         }
         break;
      case GL_LUMINANCE:
         if (table->Type == GL_FLOAT) {
            const GLfloat *tableF = (const GLfloat *) table->Table;
            GLuint i;
            for (i = 0; i < table->Size; i++) {
               rgba[i][RCOMP] = IROUND_POS(tableF[i] * CHAN_MAXF);
               rgba[i][GCOMP] = IROUND_POS(tableF[i] * CHAN_MAXF);
               rgba[i][BCOMP] = IROUND_POS(tableF[i] * CHAN_MAXF);
               rgba[i][ACOMP] = CHAN_MAX;
            }
         }
         else {
            const GLchan *tableUB = (const GLchan *) table->Table;
            GLuint i;
            for (i = 0; i < table->Size; i++) {
               rgba[i][RCOMP] = tableUB[i];
               rgba[i][GCOMP] = tableUB[i];
               rgba[i][BCOMP] = tableUB[i];
               rgba[i][ACOMP] = CHAN_MAX;
            }
         }
         break;
      case GL_LUMINANCE_ALPHA:
         if (table->Type == GL_FLOAT) {
            const GLfloat *tableF = (const GLfloat *) table->Table;
            GLuint i;
            for (i = 0; i < table->Size; i++) {
               rgba[i][RCOMP] = IROUND_POS(tableF[i*2+0] * CHAN_MAXF);
               rgba[i][GCOMP] = IROUND_POS(tableF[i*2+0] * CHAN_MAXF);
               rgba[i][BCOMP] = IROUND_POS(tableF[i*2+0] * CHAN_MAXF);
               rgba[i][ACOMP] = IROUND_POS(tableF[i*2+1] * CHAN_MAXF);
            }
         }
         else {
            const GLchan *tableUB = (const GLchan *) table->Table;
            GLuint i;
            for (i = 0; i < table->Size; i++) {
               rgba[i][RCOMP] = tableUB[i*2+0];
               rgba[i][GCOMP] = tableUB[i*2+0];
               rgba[i][BCOMP] = tableUB[i*2+0];
               rgba[i][ACOMP] = tableUB[i*2+1];
            }
         }
         break;
      case GL_INTENSITY:
         if (table->Type == GL_FLOAT) {
            const GLfloat *tableF = (const GLfloat *) table->Table;
            GLuint i;
            for (i = 0; i < table->Size; i++) {
               rgba[i][RCOMP] = IROUND_POS(tableF[i] * CHAN_MAXF);
               rgba[i][GCOMP] = IROUND_POS(tableF[i] * CHAN_MAXF);
               rgba[i][BCOMP] = IROUND_POS(tableF[i] * CHAN_MAXF);
               rgba[i][ACOMP] = IROUND_POS(tableF[i] * CHAN_MAXF);
            }
         }
         else {
            const GLchan *tableUB = (const GLchan *) table->Table;
            GLuint i;
            for (i = 0; i < table->Size; i++) {
               rgba[i][RCOMP] = tableUB[i];
               rgba[i][GCOMP] = tableUB[i];
               rgba[i][BCOMP] = tableUB[i];
               rgba[i][ACOMP] = tableUB[i];
            }
         }
         break;
      case GL_RGB:
         if (table->Type == GL_FLOAT) {
            const GLfloat *tableF = (const GLfloat *) table->Table;
            GLuint i;
            for (i = 0; i < table->Size; i++) {
               rgba[i][RCOMP] = IROUND_POS(tableF[i*3+0] * CHAN_MAXF);
               rgba[i][GCOMP] = IROUND_POS(tableF[i*3+1] * CHAN_MAXF);
               rgba[i][BCOMP] = IROUND_POS(tableF[i*3+2] * CHAN_MAXF);
               rgba[i][ACOMP] = CHAN_MAX;
            }
         }
         else {
            const GLchan *tableUB = (const GLchan *) table->Table;
            GLuint i;
            for (i = 0; i < table->Size; i++) {
               rgba[i][RCOMP] = tableUB[i*3+0];
               rgba[i][GCOMP] = tableUB[i*3+1];
               rgba[i][BCOMP] = tableUB[i*3+2];
               rgba[i][ACOMP] = CHAN_MAX;
            }
         }
         break;
      case GL_RGBA:
         if (table->Type == GL_FLOAT) {
            const GLfloat *tableF = (const GLfloat *) table->Table;
            GLuint i;
            for (i = 0; i < table->Size; i++) {
               rgba[i][RCOMP] = IROUND_POS(tableF[i*4+0] * CHAN_MAXF);
               rgba[i][GCOMP] = IROUND_POS(tableF[i*4+1] * CHAN_MAXF);
               rgba[i][BCOMP] = IROUND_POS(tableF[i*4+2] * CHAN_MAXF);
               rgba[i][ACOMP] = IROUND_POS(tableF[i*4+3] * CHAN_MAXF);
            }
         }
         else {
            const GLchan *tableUB = (const GLchan *) table->Table;
            GLuint i;
            for (i = 0; i < table->Size; i++) {
               rgba[i][RCOMP] = tableUB[i*4+0];
               rgba[i][GCOMP] = tableUB[i*4+1];
               rgba[i][BCOMP] = tableUB[i*4+2];
               rgba[i][ACOMP] = tableUB[i*4+3];
            }
         }
         break;
      default:
         _mesa_problem(ctx, "bad table format in glGetColorTable");
         return;
   }

   if (ctx->Pack.BufferObj->Name) {
      /* pack color table into PBO */
      GLubyte *buf;
      if (!_mesa_validate_pbo_access(1, &ctx->Pack, table->Size, 1, 1,
                                     format, type, data)) {
         _mesa_error(ctx, GL_INVALID_OPERATION,
                     "glGetColorTable(invalid PBO access)");
         return;
      }
      buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
                                              GL_WRITE_ONLY_ARB,
                                              ctx->Pack.BufferObj);
      if (!buf) {
         /* buffer is already mapped - that's an error */
         _mesa_error(ctx, GL_INVALID_OPERATION,
                     "glGetColorTable(PBO is mapped)");
         return;
      }
      data = ADD_POINTERS(buf, data);
   }

   _mesa_pack_rgba_span_chan(ctx, table->Size, (const GLchan (*)[4]) rgba,
                        format, type, data, &ctx->Pack, GL_FALSE);

   if (ctx->Pack.BufferObj->Name) {
      ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
                              ctx->Pack.BufferObj);
   }
}



void GLAPIENTRY
_mesa_ColorTableParameterfv(GLenum target, GLenum pname, const GLfloat *params)
{
   GET_CURRENT_CONTEXT(ctx);
   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);

   switch (target) {
      case GL_COLOR_TABLE_SGI:
         if (pname == GL_COLOR_TABLE_SCALE_SGI) {
            ctx->Pixel.ColorTableScale[0] = params[0];
            ctx->Pixel.ColorTableScale[1] = params[1];
            ctx->Pixel.ColorTableScale[2] = params[2];
            ctx->Pixel.ColorTableScale[3] = params[3];
         }
         else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
            ctx->Pixel.ColorTableBias[0] = params[0];
            ctx->Pixel.ColorTableBias[1] = params[1];
            ctx->Pixel.ColorTableBias[2] = params[2];
            ctx->Pixel.ColorTableBias[3] = params[3];
         }
         else {
            _mesa_error(ctx, GL_INVALID_ENUM, "glColorTableParameterfv(pname)");
            return;
         }
         break;
      case GL_TEXTURE_COLOR_TABLE_SGI:
         if (!ctx->Extensions.SGI_texture_color_table) {
            _mesa_error(ctx, GL_INVALID_ENUM, "glColorTableParameter(target)");
            return;
         }
         if (pname == GL_COLOR_TABLE_SCALE_SGI) {
            ctx->Pixel.TextureColorTableScale[0] = params[0];
            ctx->Pixel.TextureColorTableScale[1] = params[1];
            ctx->Pixel.TextureColorTableScale[2] = params[2];
            ctx->Pixel.TextureColorTableScale[3] = params[3];
         }
         else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
            ctx->Pixel.TextureColorTableBias[0] = params[0];
            ctx->Pixel.TextureColorTableBias[1] = params[1];
            ctx->Pixel.TextureColorTableBias[2] = params[2];
            ctx->Pixel.TextureColorTableBias[3] = params[3];
         }
         else {
            _mesa_error(ctx, GL_INVALID_ENUM, "glColorTableParameterfv(pname)");
            return;
         }
         break;
      case GL_POST_CONVOLUTION_COLOR_TABLE_SGI:
         if (pname == GL_COLOR_TABLE_SCALE_SGI) {
            ctx->Pixel.PCCTscale[0] = params[0];
            ctx->Pixel.PCCTscale[1] = params[1];
            ctx->Pixel.PCCTscale[2] = params[2];
            ctx->Pixel.PCCTscale[3] = params[3];
         }
         else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
            ctx->Pixel.PCCTbias[0] = params[0];
            ctx->Pixel.PCCTbias[1] = params[1];
            ctx->Pixel.PCCTbias[2] = params[2];
            ctx->Pixel.PCCTbias[3] = params[3];
         }
         else {
            _mesa_error(ctx, GL_INVALID_ENUM, "glColorTableParameterfv(pname)");
            return;
         }
         break;
      case GL_POST_COLOR_MATRIX_COLOR_TABLE_SGI:
         if (pname == GL_COLOR_TABLE_SCALE_SGI) {
            ctx->Pixel.PCMCTscale[0] = params[0];
            ctx->Pixel.PCMCTscale[1] = params[1];
            ctx->Pixel.PCMCTscale[2] = params[2];
            ctx->Pixel.PCMCTscale[3] = params[3];
         }
         else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
            ctx->Pixel.PCMCTbias[0] = params[0];
            ctx->Pixel.PCMCTbias[1] = params[1];
            ctx->Pixel.PCMCTbias[2] = params[2];
            ctx->Pixel.PCMCTbias[3] = params[3];
         }
         else {
            _mesa_error(ctx, GL_INVALID_ENUM, "glColorTableParameterfv(pname)");
            return;
         }
         break;
      default:
         _mesa_error(ctx, GL_INVALID_ENUM, "glColorTableParameter(target)");
         return;
   }

   ctx->NewState |= _NEW_PIXEL;
}



void GLAPIENTRY
_mesa_ColorTableParameteriv(GLenum target, GLenum pname, const GLint *params)
{
   GLfloat fparams[4];
   if (pname == GL_COLOR_TABLE_SGI ||
       pname == GL_TEXTURE_COLOR_TABLE_SGI ||
       pname == GL_POST_CONVOLUTION_COLOR_TABLE_SGI ||
       pname == GL_POST_COLOR_MATRIX_COLOR_TABLE_SGI) {
      /* four values */
      fparams[0] = (GLfloat) params[0];
      fparams[1] = (GLfloat) params[1];
      fparams[2] = (GLfloat) params[2];
      fparams[3] = (GLfloat) params[3];
   }
   else {
      /* one values */
      fparams[0] = (GLfloat) params[0];
   }
   _mesa_ColorTableParameterfv(target, pname, fparams);
}



void GLAPIENTRY
_mesa_GetColorTableParameterfv( GLenum target, GLenum pname, GLfloat *params )
{
   GET_CURRENT_CONTEXT(ctx);
   struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
   struct gl_color_table *table = NULL;
   ASSERT_OUTSIDE_BEGIN_END(ctx);

   switch (target) {
      case GL_TEXTURE_1D:
         table = &texUnit->Current1D->Palette;
         break;
      case GL_TEXTURE_2D:
         table = &texUnit->Current2D->Palette;
         break;
      case GL_TEXTURE_3D:
         table = &texUnit->Current3D->Palette;
         break;
      case GL_TEXTURE_CUBE_MAP_ARB:
         if (!ctx->Extensions.ARB_texture_cube_map) {
            _mesa_error(ctx, GL_INVALID_ENUM,
                        "glGetColorTableParameterfv(target)");
            return;
         }
         table = &texUnit->CurrentCubeMap->Palette;
         break;
      case GL_PROXY_TEXTURE_1D:
         table = &ctx->Texture.Proxy1D->Palette;
         break;
      case GL_PROXY_TEXTURE_2D:
         table = &ctx->Texture.Proxy2D->Palette;
         break;
      case GL_PROXY_TEXTURE_3D:
         table = &ctx->Texture.Proxy3D->Palette;
         break;
      case GL_PROXY_TEXTURE_CUBE_MAP_ARB:
         if (!ctx->Extensions.ARB_texture_cube_map) {
            _mesa_error(ctx, GL_INVALID_ENUM,
                        "glGetColorTableParameterfv(target)");
            return;