src/mesa/main/extensions.c

   1 /* $Id: extensions.c,v 1.70 2002/03/13 04:33:16 brianp Exp $ */
   2
   3 /*
   4  * Mesa 3-D graphics library
   5  * Version:  4.1
   6  *
   7  * Copyright (C) 1999-2002  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
  27
  28 #ifdef PC_HEADER
  29 #include "all.h"
  30 #else
  31 #include "glheader.h"
  32 #include "context.h"
  33 #include "extensions.h"
  34 #include "mem.h"
  35 #include "simple_list.h"
  36 #include "mtypes.h"
  37 #endif
  38
  39
  40 #define MAX_EXT_NAMELEN 80
  41
  42 struct extension {
  43    struct extension *next, *prev;
  44    GLint enabled;
  45    GLboolean *flag;                     /* optional flag stored elsewhere */
  46    char name[MAX_EXT_NAMELEN+1];
  47    void (*notify)( GLcontext *, GLboolean );
  48 };
  49
  50 #define F(x) (int)&(((struct gl_extensions *)0)->x)
  51 #define ON GL_TRUE
  52 #define OFF GL_FALSE
  53
  54 static struct {
  55    GLboolean enabled;
  56    const char *name;
  57    int flag_offset;
  58 } default_extensions[] = {
  59    { OFF, "GL_ARB_depth_texture",              F(ARB_depth_texture) },
  60    { OFF, "GL_ARB_imaging",                    F(ARB_imaging) },
  61    { OFF, "GL_ARB_multisample",                F(ARB_multisample) },
  62    { OFF, "GL_ARB_multitexture",               F(ARB_multitexture) },
  63    { OFF, "GL_ARB_shadow",                     F(ARB_shadow) },
  64    { OFF, "GL_ARB_shadow_ambient",             F(SGIX_shadow_ambient) },
  65    { OFF, "GL_ARB_texture_border_clamp",       F(ARB_texture_border_clamp) },
  66    { OFF, "GL_ARB_texture_compression",        F(ARB_texture_compression) },
  67    { OFF, "GL_ARB_texture_cube_map",           F(ARB_texture_cube_map) },
  68    { OFF, "GL_ARB_texture_env_add",            F(EXT_texture_env_add) },
  69    { OFF, "GL_ARB_texture_env_combine",        F(ARB_texture_env_combine) },
  70    { OFF, "GL_ARB_texture_env_dot3",           F(ARB_texture_env_dot3) },
  71    { OFF, "GL_ARB_texture_mirrored_repeat",    F(ARB_texture_mirrored_repeat)},
  72    { ON,  "GL_ARB_transpose_matrix",           0 },
  73    { ON,  "GL_ARB_window_pos",                 F(ARB_window_pos) },
  74    { ON,  "GL_EXT_abgr",                       0 },
  75    { ON,  "GL_EXT_bgra",                       0 },
  76    { OFF, "GL_EXT_blend_color",                F(EXT_blend_color) },
  77    { OFF, "GL_EXT_blend_func_separate",        F(EXT_blend_func_separate) },
  78    { OFF, "GL_EXT_blend_logic_op",             F(EXT_blend_logic_op) },
  79    { OFF, "GL_EXT_blend_minmax",               F(EXT_blend_minmax) },
  80    { OFF, "GL_EXT_blend_subtract",             F(EXT_blend_subtract) },
  81    { ON,  "GL_EXT_clip_volume_hint",           F(EXT_clip_volume_hint) },
  82    { OFF, "GL_EXT_cull_vertex",                0 },
  83    { OFF, "GL_EXT_convolution",                F(EXT_convolution) },
  84    { ON,  "GL_EXT_compiled_vertex_array",      F(EXT_compiled_vertex_array) },
  85    { OFF, "GL_EXT_fog_coord",                  F(EXT_fog_coord) },
  86    { OFF, "GL_EXT_histogram",                  F(EXT_histogram) },
  87    { ON,  "GL_EXT_packed_pixels",              F(EXT_packed_pixels) },
  88    { OFF, "GL_EXT_paletted_texture",           F(EXT_paletted_texture) },
  89    { OFF, "GL_EXT_point_parameters",           F(EXT_point_parameters) },
  90    { ON,  "GL_EXT_polygon_offset",             F(EXT_polygon_offset) },
  91    { ON,  "GL_EXT_rescale_normal",             F(EXT_rescale_normal) },
  92    { OFF, "GL_EXT_secondary_color",            F(EXT_secondary_color) },
  93    { OFF, "GL_EXT_shared_texture_palette",     F(EXT_shared_texture_palette) },
  94    { OFF, "GL_EXT_stencil_wrap",               F(EXT_stencil_wrap) },
  95    { ON,  "GL_EXT_texture3D",                  F(EXT_texture3D) },
  96    { OFF, "GL_EXT_texture_compression_s3tc",   F(EXT_texture_compression_s3tc) },
  97    { OFF, "GL_EXT_texture_edge_clamp",         F(SGIS_texture_edge_clamp) },
  98    { OFF, "GL_EXT_texture_env_add",            F(EXT_texture_env_add) },
  99    { OFF, "GL_EXT_texture_env_combine",        F(EXT_texture_env_combine) },
 100    { OFF, "GL_EXT_texture_env_dot3",           F(EXT_texture_env_dot3) },
 101    { OFF, "GL_EXT_texture_filter_anisotropic", F(EXT_texture_filter_anisotropic) },
 102    { ON,  "GL_EXT_texture_object",             F(EXT_texture_object) },
 103    { OFF, "GL_EXT_texture_lod_bias",           F(EXT_texture_lod_bias) },
 104    { ON,  "GL_EXT_vertex_array",               0 },
 105    { OFF, "GL_EXT_vertex_array_set",           F(EXT_vertex_array_set) },
 106    { OFF, "GL_HP_occlusion_test",              F(HP_occlusion_test) },
 107    { ON,  "GL_IBM_rasterpos_clip",             F(IBM_rasterpos_clip) },
 108    { OFF, "GL_INGR_blend_func_separate",       F(INGR_blend_func_separate) },
 109    { OFF, "GL_MESA_packed_depth_stencil",      0 },
 110    { OFF, "GL_MESA_resize_buffers",            F(MESA_resize_buffers) },
 111    { OFF, "GL_MESA_sprite_point",              F(MESA_sprite_point) },
 112    { ON,  "GL_MESA_window_pos",                F(MESA_window_pos) },
 113    { OFF, "GL_NV_blend_square",                F(NV_blend_square) },
 114    { ON,  "GL_NV_texgen_reflection",           F(NV_texgen_reflection) },
 115    { OFF, "GL_NV_vertex_program",              F(NV_vertex_program) },
 116    { OFF, "GL_NV_vertex_program1_1",           F(NV_vertex_program1_1) },
 117    { OFF, "GL_SGI_color_matrix",               F(SGI_color_matrix) },
 118    { OFF, "GL_SGI_color_table",                F(SGI_color_table) },
 119    { OFF, "GL_SGIS_generate_mipmap",           F(SGIS_generate_mipmap) },
 120    { OFF, "GL_SGIS_pixel_texture",             F(SGIS_pixel_texture) },
 121    { OFF, "GL_SGIS_texture_border_clamp",      F(ARB_texture_border_clamp) },
 122    { OFF, "GL_SGIS_texture_edge_clamp",        F(SGIS_texture_edge_clamp) },
 123    { OFF, "GL_SGIX_depth_texture",             F(SGIX_depth_texture) },
 124    { OFF, "GL_SGIX_pixel_texture",             F(SGIX_pixel_texture) },
 125    { OFF, "GL_SGIX_shadow",                    F(SGIX_shadow) },
 126    { OFF, "GL_SGIX_shadow_ambient",            F(SGIX_shadow_ambient) },
 127    { OFF, "GL_3DFX_texture_compression_FXT1",  F(_3DFX_texture_compression_FXT1) }
 128 };
 129
 130
 131
 132
 133 /*
 134  * Enable all extensions suitable for a software-only renderer.
 135  * This is a convenience function used by the XMesa, OSMesa, GGI drivers, etc.
 136  */
 137 void
 138 _mesa_enable_sw_extensions(GLcontext *ctx)
 139 {
 140    const char *extensions[] = {
 141       "GL_ARB_depth_texture",
 142       "GL_ARB_imaging",
 143       "GL_ARB_multitexture",
 144       "GL_ARB_shadow",
 145       "GL_ARB_shadow_ambient",
 146       "GL_ARB_texture_border_clamp",
 147       "GL_ARB_texture_cube_map",
 148       "GL_ARB_texture_env_add",
 149       "GL_ARB_texture_env_combine",
 150       "GL_ARB_texture_env_dot3",
 151       "GL_ARB_texture_mirrored_repeat",
 152       "GL_EXT_blend_color",
 153       "GL_EXT_blend_func_separate",
 154       "GL_EXT_blend_logic_op",
 155       "GL_EXT_blend_minmax",
 156       "GL_EXT_blend_subtract",
 157       "GL_EXT_convolution",
 158       "GL_EXT_fog_coord",
 159       "GL_EXT_histogram",
 160       "GL_EXT_paletted_texture",
 161       "GL_EXT_point_parameters",
 162       "GL_EXT_secondary_color",
 163       "GL_EXT_shared_texture_palette",
 164       "GL_EXT_stencil_wrap",
 165       "GL_EXT_texture_edge_clamp",
 166       "GL_EXT_texture_env_add",
 167       "GL_EXT_texture_env_combine",
 168       "GL_EXT_texture_env_dot3",
 169       "GL_EXT_texture_lod_bias",
 170       "GL_HP_occlusion_test",
 171       "GL_INGR_blend_func_separate",
 172       "GL_MESA_resize_buffers",
 173       "GL_NV_blend_square",
 174       "GL_NV_texgen_reflection",
 175       "GL_NV_vertex_program",
 176       "GL_NV_vertex_program1_1",
 177       "GL_SGI_color_matrix",
 178       "GL_SGI_color_table",
 179       "GL_SGIS_generate_mipmap",
 180       "GL_SGIS_pixel_texture",
 181       "GL_SGIS_texture_edge_clamp",
 182       "GL_SGIS_texture_border_clamp",
 183       "GL_SGIX_depth_texture",
 184       "GL_SGIX_pixel_texture",
 185       "GL_SGIX_shadow",
 186       "GL_SGIX_shadow_ambient",
 187       NULL
 188    };
 189    GLuint i;
 190
 191    for (i = 0; extensions[i]; i++) {
 192       _mesa_enable_extension(ctx, extensions[i]);
 193    }
 194 }
 195
 196
 197 /*
 198  * Enable GL_ARB_imaging and all the EXT extensions that are subsets of it.
 199  */
 200 void
 201 _mesa_enable_imaging_extensions(GLcontext *ctx)
 202 {
 203    const char *extensions[] = {
 204       "GL_ARB_imaging",
 205       "GL_EXT_blend_color",
 206       "GL_EXT_blend_minmax",
 207       "GL_EXT_blend_subtract",
 208       "GL_EXT_convolution",
 209       "GL_EXT_histogram",
 210       "GL_SGI_color_matrix",
 211       "GL_SGI_color_table",
 212       NULL
 213    };
 214    GLuint i;
 215
 216    for (i = 0; extensions[i]; i++) {
 217       _mesa_enable_extension(ctx, extensions[i]);
 218    }
 219 }
 220
 221
 222
 223 /*
 224  * Enable all OpenGL 1.3 features and extensions.
 225  */
 226 void
 227 _mesa_enable_1_3_extensions(GLcontext *ctx)
 228 {
 229    const char *extensions[] = {
 230       "GL_ARB_multisample",
 231       "GL_ARB_multitexture",
 232       "GL_ARB_texture_border_clamp",
 233       "GL_ARB_texture_compression",
 234       "GL_ARB_texture_cube_map",
 235       "GL_ARB_texture_env_add",
 236       "GL_ARB_texture_env_combine",
 237       "GL_ARB_texture_env_dot3",
 238       "GL_ARB_transpose_matrix",
 239       NULL
 240    };
 241    GLuint i;
 242
 243    for (i = 0; extensions[i]; i++) {
 244       _mesa_enable_extension(ctx, extensions[i]);
 245    }
 246 }
 247
 248
 249
 250 /*
 251  * Add a new extenstion.  This would be called from a Mesa driver.
 252  */
 253 void
 254 _mesa_add_extension( GLcontext *ctx,
 255                      GLboolean enabled,
 256                      const char *name,
 257                      GLboolean *flag_ptr )
 258 {
 259    /* We should never try to add an extension after
 260     * _mesa_extensions_get_string() has been called!
 261     */
 262    assert(ctx->Extensions.ext_string == 0);
 263
 264    {
 265       struct extension *t = MALLOC_STRUCT(extension);
 266       t->enabled = enabled;
 267       strncpy(t->name, name, MAX_EXT_NAMELEN);
 268       t->name[MAX_EXT_NAMELEN] = 0;
 269       t->flag = flag_ptr;
 270       if (t->flag)
 271          *t->flag = enabled;
 272       insert_at_tail( ctx->Extensions.ext_list, t );
 273    }
 274 }
 275
 276
 277 /*
 278  * Either enable or disable the named extension.
 279  */
 280 static void
 281 set_extension( GLcontext *ctx, const char *name, GLint state )
 282 {
 283    /* XXX we should assert that ext_string is null.  We should never be
 284     * enabling/disabling extensions after _mesa_extensions_get_string()
 285     * has been called!
 286     */
 287    struct extension *i;
 288    foreach( i, ctx->Extensions.ext_list )
 289       if (strncmp(i->name, name, MAX_EXT_NAMELEN) == 0)
 290          break;
 291
 292    if (i == ctx->Extensions.ext_list) {
 293       /* this is an error.  Drivers should never try to enable/disable
 294        * an extension which is unknown to Mesa or wasn't added by calling
 295        * _mesa_add_extension().
 296        */
 297       return;
 298    }
 299
 300    if (i->flag)
 301       *(i->flag) = state;
 302    i->enabled = state;
 303 }
 304
 305
 306
 307 void
 308 _mesa_enable_extension( GLcontext *ctx, const char *name )
 309 {
 310    if (ctx->Extensions.ext_string == 0)
 311       set_extension( ctx, name, 1 );
 312 }
 313
 314
 315 void
 316 _mesa_disable_extension( GLcontext *ctx, const char *name )
 317 {
 318    if (ctx->Extensions.ext_string == 0)
 319       set_extension( ctx, name, 0 );
 320 }
 321
 322
 323 /*
 324  * Test if the named extension is enabled in this context.
 325  */
 326 GLboolean
 327 _mesa_extension_is_enabled( GLcontext *ctx, const char *name)
 328 {
 329    struct extension *i;
 330    foreach( i, ctx->Extensions.ext_list )
 331       if (strncmp(i->name, name, MAX_EXT_NAMELEN) == 0) {
 332          if (i->enabled)
 333             return GL_TRUE;
 334          else
 335             return GL_FALSE;
 336       }
 337
 338    return GL_FALSE;
 339 }
 340
 341
 342 void
 343 _mesa_extensions_dtr( GLcontext *ctx )
 344 {
 345    struct extension *i, *nexti;
 346
 347    if (ctx->Extensions.ext_string) {
 348       FREE( ctx->Extensions.ext_string );
 349       ctx->Extensions.ext_string = 0;
 350    }
 351
 352    if (ctx->Extensions.ext_list) {
 353       foreach_s( i, nexti, ctx->Extensions.ext_list ) {
 354          remove_from_list( i );
 355          FREE( i );
 356       }
 357
 358       FREE(ctx->Extensions.ext_list);
 359       ctx->Extensions.ext_list = 0;
 360    }
 361 }
 362
 363
 364 void
 365 _mesa_extensions_ctr( GLcontext *ctx )
 366 {
 367    GLuint i;
 368    GLboolean *base = (GLboolean *)&ctx->Extensions;
 369
 370    ctx->Extensions.ext_string = NULL;
 371    ctx->Extensions.ext_list = MALLOC_STRUCT(extension);
 372    make_empty_list( ctx->Extensions.ext_list );
 373
 374    for (i = 0 ; i < Elements(default_extensions) ; i++) {
 375       GLboolean *ptr = NULL;
 376
 377       if (default_extensions[i].flag_offset)
 378          ptr = base + default_extensions[i].flag_offset;
 379
 380       (void) _mesa_add_extension( ctx,
 381                                   default_extensions[i].enabled,
 382                                   default_extensions[i].name,
 383                                   ptr);
 384    }
 385 }
 386
 387
 388 const char *
 389 _mesa_extensions_get_string( GLcontext *ctx )
 390 {
 391    if (ctx->Extensions.ext_string == 0)
 392    {
 393       struct extension *i;
 394       char *str;
 395       GLuint len = 0;
 396       foreach (i, ctx->Extensions.ext_list)
 397          if (i->enabled)
 398             len += strlen(i->name) + 1;
 399
 400       if (len == 0)
 401          return "";
 402
 403       str = (char *)MALLOC(len * sizeof(char));
 404       ctx->Extensions.ext_string = str;
 405
 406       foreach (i, ctx->Extensions.ext_list)
 407          if (i->enabled) {
 408             strcpy(str, i->name);
 409             str += strlen(str);
 410             *str++ = ' ';
 411          }
 412
 413       *(str-1) = 0;
 414    }
 415
 416    return ctx->Extensions.ext_string;
 417 }