src/mesa/main/colortab.c

   1 /* $Id: colortab.c,v 1.3 1999/11/08 07:36:43 brianp Exp $ */
   2
   3 /*
   4  * Mesa 3-D graphics library
   5  * Version:  3.1
   6  *
   7  * Copyright (C) 1999  Brian Paul   All Rights Reserved.
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a
  10  * copy of this software and associated documentation files (the "Software"),
  11  * to deal in the Software without restriction, including without limitation
  12  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  13  * and/or sell copies of the Software, and to permit persons to whom the
  14  * Software is furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice shall be included
  17  * in all copies or substantial portions of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  23  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  24  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  */
  26 /* $XFree86: xc/lib/GL/mesa/src/colortab.c,v 1.2 1999/04/04 00:20:21 dawes Exp $ */
  27
  28
  29
  30
  31
  32 #ifdef PC_HEADER
  33 #include "all.h"
  34 #else
  35 #ifdef XFree86Server
  36 #include "GL/xf86glx.h"
  37 #endif
  38 #include "colortab.h"
  39 #include "context.h"
  40 #include "macros.h"
  41 #endif
  42
  43
  44
  45 /*
  46  * Return GL_TRUE if k is a power of two, else return GL_FALSE.
  47  */
  48 static GLboolean power_of_two( GLint k )
  49 {
  50    GLint i, m = 1;
  51    for (i=0; i<32; i++) {
  52       if (k == m)
  53          return GL_TRUE;
  54       m = m << 1;
  55    }
  56    return GL_FALSE;
  57 }
  58
  59
  60 static GLint decode_internal_format( GLint format )
  61 {
  62    switch (format) {
  63       case GL_ALPHA:
  64       case GL_ALPHA4:
  65       case GL_ALPHA8:
  66       case GL_ALPHA12:
  67       case GL_ALPHA16:
  68          return GL_ALPHA;
  69       case 1:
  70       case GL_LUMINANCE:
  71       case GL_LUMINANCE4:
  72       case GL_LUMINANCE8:
  73       case GL_LUMINANCE12:
  74       case GL_LUMINANCE16:
  75          return GL_LUMINANCE;
  76       case 2:
  77       case GL_LUMINANCE_ALPHA:
  78       case GL_LUMINANCE4_ALPHA4:
  79       case GL_LUMINANCE6_ALPHA2:
  80       case GL_LUMINANCE8_ALPHA8:
  81       case GL_LUMINANCE12_ALPHA4:
  82       case GL_LUMINANCE12_ALPHA12:
  83       case GL_LUMINANCE16_ALPHA16:
  84          return GL_LUMINANCE_ALPHA;
  85       case GL_INTENSITY:
  86       case GL_INTENSITY4:
  87       case GL_INTENSITY8:
  88       case GL_INTENSITY12:
  89       case GL_INTENSITY16:
  90          return GL_INTENSITY;
  91       case 3:
  92       case GL_RGB:
  93       case GL_R3_G3_B2:
  94       case GL_RGB4:
  95       case GL_RGB5:
  96       case GL_RGB8:
  97       case GL_RGB10:
  98       case GL_RGB12:
  99       case GL_RGB16:
 100          return GL_RGB;
 101       case 4:
 102       case GL_RGBA:
 103       case GL_RGBA2:
 104       case GL_RGBA4:
 105       case GL_RGB5_A1:
 106       case GL_RGBA8:
 107       case GL_RGB10_A2:
 108       case GL_RGBA12:
 109       case GL_RGBA16:
 110          return GL_RGBA;
 111       default:
 112          return -1;  /* error */
 113    }
 114 }
 115
 116
 117 void gl_ColorTable( GLcontext *ctx, GLenum target,
 118                     GLenum internalFormat, struct gl_image *table )
 119 {
 120    struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 121    struct gl_texture_object *texObj;
 122    GLboolean proxy = GL_FALSE;
 123
 124    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glColorTable");
 125
 126    if (decode_internal_format(internalFormat) < 0) {
 127       gl_error( ctx, GL_INVALID_ENUM, "glColorTable(internalFormat)" );
 128       return;
 129    }
 130
 131    switch (target) {
 132       case GL_TEXTURE_1D:
 133          texObj = texUnit->CurrentD[1];
 134          break;
 135       case GL_TEXTURE_2D:
 136          texObj = texUnit->CurrentD[2];
 137          break;
 138       case GL_TEXTURE_3D_EXT:
 139          texObj = texUnit->CurrentD[3];
 140          break;
 141       case GL_PROXY_TEXTURE_1D:
 142          texObj = ctx->Texture.Proxy1D;
 143          proxy = GL_TRUE;
 144          break;
 145       case GL_PROXY_TEXTURE_2D:
 146          texObj = ctx->Texture.Proxy2D;
 147          proxy = GL_TRUE;
 148          break;
 149       case GL_PROXY_TEXTURE_3D_EXT:
 150          texObj = ctx->Texture.Proxy3D;
 151          proxy = GL_TRUE;
 152          break;
 153       case GL_SHARED_TEXTURE_PALETTE_EXT:
 154          texObj = NULL;
 155          break;
 156       default:
 157          gl_error(ctx, GL_INVALID_ENUM, "glColorTableEXT(target)");
 158          return;
 159    }
 160
 161    /* internalformat = just like glTexImage */
 162
 163    if (table->Width < 1 || table->Width > MAX_TEXTURE_PALETTE_SIZE
 164        || !power_of_two(table->Width)) {
 165       gl_error(ctx, GL_INVALID_VALUE, "glColorTableEXT(width)");
 166       if (proxy) {
 167          texObj->PaletteSize = 0;
 168          texObj->PaletteIntFormat = (GLenum) 0;
 169          texObj->PaletteFormat = (GLenum) 0;
 170       }
 171       return;
 172    }
 173
 174    if (texObj) {
 175       /* per-texture object palette */
 176       texObj->PaletteSize = table->Width;
 177       texObj->PaletteIntFormat = internalFormat;
 178       texObj->PaletteFormat = (GLenum) decode_internal_format(internalFormat);
 179       if (!proxy) {
 180          MEMCPY(texObj->Palette, table->Data, table->Width*table->Components);
 181          if (ctx->Driver.UpdateTexturePalette) {
 182             (*ctx->Driver.UpdateTexturePalette)( ctx, texObj );
 183          }
 184       }
 185    }
 186    else {
 187       /* shared texture palette */
 188       ctx->Texture.PaletteSize = table->Width;
 189       ctx->Texture.PaletteIntFormat = internalFormat;
 190       ctx->Texture.PaletteFormat = (GLenum) decode_internal_format(internalFormat);
 191       MEMCPY(ctx->Texture.Palette, table->Data, table->Width*table->Components);
 192       if (ctx->Driver.UpdateTexturePalette) {
 193          (*ctx->Driver.UpdateTexturePalette)( ctx, NULL );
 194       }
 195    }
 196 }
 197
 198
 199
 200 void gl_ColorSubTable( GLcontext *ctx, GLenum target,
 201                        GLsizei start, struct gl_image *data )
 202 {
 203    /* XXX TODO */
 204    gl_problem(ctx, "glColorSubTableEXT not implemented");
 205    (void) target;
 206    (void) start;
 207    (void) data;
 208 }
 209
 210
 211
 212 void gl_GetColorTable( GLcontext *ctx, GLenum target, GLenum format,
 213                        GLenum type, GLvoid *table )
 214 {
 215    ASSERT_OUTSIDE_BEGIN_END(ctx, "glGetBooleanv");
 216
 217    switch (target) {
 218       case GL_TEXTURE_1D:
 219          break;
 220       case GL_TEXTURE_2D:
 221          break;
 222       case GL_TEXTURE_3D_EXT:
 223          break;
 224       case GL_SHARED_TEXTURE_PALETTE_EXT:
 225          break;
 226       default:
 227          gl_error(ctx, GL_INVALID_ENUM, "glGetColorTableEXT(target)");
 228          return;
 229    }
 230
 231    gl_problem(ctx, "glGetColorTableEXT not implemented!");
 232    (void) format;
 233    (void) type;
 234    (void) table;
 235 }
 236
 237
 238
 239 void gl_GetColorTableParameterfv( GLcontext *ctx, GLenum target,
 240                                   GLenum pname, GLfloat *params )
 241 {
 242    GLint iparams[10];
 243
 244    gl_GetColorTableParameteriv( ctx, target, pname, iparams );
 245    *params = (GLfloat) iparams[0];
 246 }
 247
 248
 249
 250 void gl_GetColorTableParameteriv( GLcontext *ctx, GLenum target,
 251                                   GLenum pname, GLint *params )
 252 {
 253    struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 254    struct gl_texture_object *texObj;
 255
 256    ASSERT_OUTSIDE_BEGIN_END(ctx, "glGetColorTableParameter");
 257
 258    switch (target) {
 259       case GL_TEXTURE_1D:
 260          texObj = texUnit->CurrentD[1];
 261          break;
 262       case GL_TEXTURE_2D:
 263          texObj = texUnit->CurrentD[2];
 264          break;
 265       case GL_TEXTURE_3D_EXT:
 266          texObj = texUnit->CurrentD[3];
 267          break;
 268       case GL_SHARED_TEXTURE_PALETTE_EXT:
 269          texObj = NULL;
 270          break;
 271       default:
 272          gl_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameter(target)");
 273          return;
 274    }
 275
 276    switch (pname) {
 277       case GL_COLOR_TABLE_FORMAT_EXT:
 278          if (texObj)
 279             *params = texObj->PaletteIntFormat;
 280          else
 281             *params = ctx->Texture.PaletteIntFormat;
 282          break;
 283       case GL_COLOR_TABLE_WIDTH_EXT:
 284          if (texObj)
 285             *params = texObj->PaletteSize;
 286          else
 287             *params = ctx->Texture.PaletteSize;
 288          break;
 289       case GL_COLOR_TABLE_RED_SIZE_EXT:
 290          *params = 8;
 291          break;
 292       case GL_COLOR_TABLE_GREEN_SIZE_EXT:
 293          *params = 8;
 294          break;
 295       case GL_COLOR_TABLE_BLUE_SIZE_EXT:
 296          *params = 8;
 297          break;
 298       case GL_COLOR_TABLE_ALPHA_SIZE_EXT:
 299          *params = 8;
 300          break;
 301       case GL_COLOR_TABLE_LUMINANCE_SIZE_EXT:
 302          *params = 8;
 303          break;
 304       case GL_COLOR_TABLE_INTENSITY_SIZE_EXT:
 305          *params = 8;
 306          break;
 307       default:
 308          gl_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameter" );
 309          return;
 310    }
 311 }
 312
 313