src/mesa/main/colortab.c

   1 /* $Id: colortab.c,v 1.2 1999/10/08 09:27:10 keithw 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 #ifdef XFree86Server
  42 #include "GL/xf86glx.h"
  43 #endif
  44 #endif
  45
  46
  47
  48 /*
  49  * Return GL_TRUE if k is a power of two, else return GL_FALSE.
  50  */
  51 static GLboolean power_of_two( GLint k )
  52 {
  53    GLint i, m = 1;
  54    for (i=0; i<32; i++) {
  55       if (k == m)
  56          return GL_TRUE;
  57       m = m << 1;
  58    }
  59    return GL_FALSE;
  60 }
  61
  62
  63 static GLint decode_internal_format( GLint format )
  64 {
  65    switch (format) {
  66       case GL_ALPHA:
  67       case GL_ALPHA4:
  68       case GL_ALPHA8:
  69       case GL_ALPHA12:
  70       case GL_ALPHA16:
  71          return GL_ALPHA;
  72       case 1:
  73       case GL_LUMINANCE:
  74       case GL_LUMINANCE4:
  75       case GL_LUMINANCE8:
  76       case GL_LUMINANCE12:
  77       case GL_LUMINANCE16:
  78          return GL_LUMINANCE;
  79       case 2:
  80       case GL_LUMINANCE_ALPHA:
  81       case GL_LUMINANCE4_ALPHA4:
  82       case GL_LUMINANCE6_ALPHA2:
  83       case GL_LUMINANCE8_ALPHA8:
  84       case GL_LUMINANCE12_ALPHA4:
  85       case GL_LUMINANCE12_ALPHA12:
  86       case GL_LUMINANCE16_ALPHA16:
  87          return GL_LUMINANCE_ALPHA;
  88       case GL_INTENSITY:
  89       case GL_INTENSITY4:
  90       case GL_INTENSITY8:
  91       case GL_INTENSITY12:
  92       case GL_INTENSITY16:
  93          return GL_INTENSITY;
  94       case 3:
  95       case GL_RGB:
  96       case GL_R3_G3_B2:
  97       case GL_RGB4:
  98       case GL_RGB5:
  99       case GL_RGB8:
 100       case GL_RGB10:
 101       case GL_RGB12:
 102       case GL_RGB16:
 103          return GL_RGB;
 104       case 4:
 105       case GL_RGBA:
 106       case GL_RGBA2:
 107       case GL_RGBA4:
 108       case GL_RGB5_A1:
 109       case GL_RGBA8:
 110       case GL_RGB10_A2:
 111       case GL_RGBA12:
 112       case GL_RGBA16:
 113          return GL_RGBA;
 114       default:
 115          return -1;  /* error */
 116    }
 117 }
 118
 119
 120 void gl_ColorTable( GLcontext *ctx, GLenum target,
 121                     GLenum internalFormat, struct gl_image *table )
 122 {
 123    struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 124    struct gl_texture_object *texObj;
 125    GLboolean proxy = GL_FALSE;
 126
 127    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glColorTable");
 128
 129    if (decode_internal_format(internalFormat) < 0) {
 130       gl_error( ctx, GL_INVALID_ENUM, "glColorTable(internalFormat)" );
 131       return;
 132    }
 133
 134    switch (target) {
 135       case GL_TEXTURE_1D:
 136          texObj = texUnit->CurrentD[1];
 137          break;
 138       case GL_TEXTURE_2D:
 139          texObj = texUnit->CurrentD[2];
 140          break;
 141       case GL_TEXTURE_3D_EXT:
 142          texObj = texUnit->CurrentD[3];
 143          break;
 144       case GL_PROXY_TEXTURE_1D:
 145          texObj = ctx->Texture.Proxy1D;
 146          proxy = GL_TRUE;
 147          break;
 148       case GL_PROXY_TEXTURE_2D:
 149          texObj = ctx->Texture.Proxy2D;
 150          proxy = GL_TRUE;
 151          break;
 152       case GL_PROXY_TEXTURE_3D_EXT:
 153          texObj = ctx->Texture.Proxy3D;
 154          proxy = GL_TRUE;
 155          break;
 156       case GL_SHARED_TEXTURE_PALETTE_EXT:
 157          texObj = NULL;
 158          break;
 159       default:
 160          gl_error(ctx, GL_INVALID_ENUM, "glColorTableEXT(target)");
 161          return;
 162    }
 163
 164    /* internalformat = just like glTexImage */
 165
 166    if (table->Width < 1 || table->Width > MAX_TEXTURE_PALETTE_SIZE
 167        || !power_of_two(table->Width)) {
 168       gl_error(ctx, GL_INVALID_VALUE, "glColorTableEXT(width)");
 169       if (proxy) {
 170          texObj->PaletteSize = 0;
 171          texObj->PaletteIntFormat = (GLenum) 0;
 172          texObj->PaletteFormat = (GLenum) 0;
 173       }
 174       return;
 175    }
 176
 177    if (texObj) {
 178       /* per-texture object palette */
 179       texObj->PaletteSize = table->Width;
 180       texObj->PaletteIntFormat = internalFormat;
 181       texObj->PaletteFormat = (GLenum) decode_internal_format(internalFormat);
 182       if (!proxy) {
 183          MEMCPY(texObj->Palette, table->Data, table->Width*table->Components);
 184          if (ctx->Driver.UpdateTexturePalette) {
 185             (*ctx->Driver.UpdateTexturePalette)( ctx, texObj );
 186          }
 187       }
 188    }
 189    else {
 190       /* shared texture palette */
 191       ctx->Texture.PaletteSize = table->Width;
 192       ctx->Texture.PaletteIntFormat = internalFormat;
 193       ctx->Texture.PaletteFormat = (GLenum) decode_internal_format(internalFormat);
 194       MEMCPY(ctx->Texture.Palette, table->Data, table->Width*table->Components);
 195       if (ctx->Driver.UpdateTexturePalette) {
 196          (*ctx->Driver.UpdateTexturePalette)( ctx, NULL );
 197       }
 198    }
 199 }
 200
 201
 202
 203 void gl_ColorSubTable( GLcontext *ctx, GLenum target,
 204                        GLsizei start, struct gl_image *data )
 205 {
 206    /* XXX TODO */
 207    gl_problem(ctx, "glColorSubTableEXT not implemented");
 208    (void) target;
 209    (void) start;
 210    (void) data;
 211 }
 212
 213
 214
 215 void gl_GetColorTable( GLcontext *ctx, GLenum target, GLenum format,
 216                        GLenum type, GLvoid *table )
 217 {
 218    ASSERT_OUTSIDE_BEGIN_END(ctx, "glGetBooleanv");
 219
 220    switch (target) {
 221       case GL_TEXTURE_1D:
 222          break;
 223       case GL_TEXTURE_2D:
 224          break;
 225       case GL_TEXTURE_3D_EXT:
 226          break;
 227       case GL_SHARED_TEXTURE_PALETTE_EXT:
 228          break;
 229       default:
 230          gl_error(ctx, GL_INVALID_ENUM, "glGetColorTableEXT(target)");
 231          return;
 232    }
 233
 234    gl_problem(ctx, "glGetColorTableEXT not implemented!");
 235    (void) format;
 236    (void) type;
 237    (void) table;
 238 }
 239
 240
 241
 242 void gl_GetColorTableParameterfv( GLcontext *ctx, GLenum target,
 243                                   GLenum pname, GLfloat *params )
 244 {
 245    GLint iparams[10];
 246
 247    gl_GetColorTableParameteriv( ctx, target, pname, iparams );
 248    *params = (GLfloat) iparams[0];
 249 }
 250
 251
 252
 253 void gl_GetColorTableParameteriv( GLcontext *ctx, GLenum target,
 254                                   GLenum pname, GLint *params )
 255 {
 256    struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 257    struct gl_texture_object *texObj;
 258
 259    ASSERT_OUTSIDE_BEGIN_END(ctx, "glGetColorTableParameter");
 260
 261    switch (target) {
 262       case GL_TEXTURE_1D:
 263          texObj = texUnit->CurrentD[1];
 264          break;
 265       case GL_TEXTURE_2D:
 266          texObj = texUnit->CurrentD[2];
 267          break;
 268       case GL_TEXTURE_3D_EXT:
 269          texObj = texUnit->CurrentD[3];
 270          break;
 271       case GL_SHARED_TEXTURE_PALETTE_EXT:
 272          texObj = NULL;
 273          break;
 274       default:
 275          gl_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameter(target)");
 276          return;
 277    }
 278
 279    switch (pname) {
 280       case GL_COLOR_TABLE_FORMAT_EXT:
 281          if (texObj)
 282             *params = texObj->PaletteIntFormat;
 283          else
 284             *params = ctx->Texture.PaletteIntFormat;
 285          break;
 286       case GL_COLOR_TABLE_WIDTH_EXT:
 287          if (texObj)
 288             *params = texObj->PaletteSize;
 289          else
 290             *params = ctx->Texture.PaletteSize;
 291          break;
 292       case GL_COLOR_TABLE_RED_SIZE_EXT:
 293          *params = 8;
 294          break;
 295       case GL_COLOR_TABLE_GREEN_SIZE_EXT:
 296          *params = 8;
 297          break;
 298       case GL_COLOR_TABLE_BLUE_SIZE_EXT:
 299          *params = 8;
 300          break;
 301       case GL_COLOR_TABLE_ALPHA_SIZE_EXT:
 302          *params = 8;
 303          break;
 304       case GL_COLOR_TABLE_LUMINANCE_SIZE_EXT:
 305          *params = 8;
 306          break;
 307       case GL_COLOR_TABLE_INTENSITY_SIZE_EXT:
 308          *params = 8;
 309          break;
 310       default:
 311          gl_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameter" );
 312          return;
 313    }
 314 }
 315
 316