src/mesa/main/extensions.c

   1 /* $Id: extensions.c,v 1.84 2002/10/24 23:57:20 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 #include "glheader.h"
  28 #include "imports.h"
  29 #include "context.h"
  30 #include "extensions.h"
  31 #include "simple_list.h"
  32 #include "mtypes.h"
  33
  34
  35 #define MAX_EXT_NAMELEN 80
  36
  37 struct extension {
  38    struct extension *next, *prev;
  39    GLint enabled;
  40    GLboolean *flag;                     /* optional flag stored elsewhere */
  41    char name[MAX_EXT_NAMELEN+1];
  42    void (*notify)( GLcontext *, GLboolean );
  43 };
  44
  45 #define F(x) (int)&(((struct gl_extensions *)0)->x)
  46 #define ON GL_TRUE
  47 #define OFF GL_FALSE
  48
  49 static struct {
  50    GLboolean enabled;
  51    const char *name;
  52    int flag_offset;
  53 } default_extensions[] = {
  54    { OFF, "GL_ARB_depth_texture",              F(ARB_depth_texture) },
  55    { OFF, "GL_ARB_imaging",                    F(ARB_imaging) },
  56    { OFF, "GL_ARB_multisample",                F(ARB_multisample) },
  57    { OFF, "GL_ARB_multitexture",               F(ARB_multitexture) },
  58    { OFF, "GL_ARB_point_parameters",           F(EXT_point_parameters) },
  59    { OFF, "GL_ARB_shadow",                     F(ARB_shadow) },
  60    { OFF, "GL_ARB_shadow_ambient",             F(SGIX_shadow_ambient) },
  61    { OFF, "GL_ARB_texture_border_clamp",       F(ARB_texture_border_clamp) },
  62    { OFF, "GL_ARB_texture_compression",        F(ARB_texture_compression) },
  63    { OFF, "GL_ARB_texture_cube_map",           F(ARB_texture_cube_map) },
  64    { OFF, "GL_ARB_texture_env_add",            F(EXT_texture_env_add) },
  65    { OFF, "GL_ARB_texture_env_combine",        F(ARB_texture_env_combine) },
  66    { OFF, "GL_ARB_texture_env_crossbar",       F(ARB_texture_env_crossbar) },
  67    { OFF, "GL_ARB_texture_env_dot3",           F(ARB_texture_env_dot3) },
  68    { OFF, "GL_ARB_texture_mirrored_repeat",    F(ARB_texture_mirrored_repeat)},
  69    { ON,  "GL_ARB_transpose_matrix",           0 },
  70    { ON,  "GL_ARB_window_pos",                 F(ARB_window_pos) },
  71    { OFF, "GL_ATI_texture_mirror_once",        F(ATI_texture_mirror_once)},
  72    { ON,  "GL_EXT_abgr",                       0 },
  73    { ON,  "GL_EXT_bgra",                       0 },
  74    { OFF, "GL_EXT_blend_color",                F(EXT_blend_color) },
  75    { OFF, "GL_EXT_blend_func_separate",        F(EXT_blend_func_separate) },
  76    { OFF, "GL_EXT_blend_logic_op",             F(EXT_blend_logic_op) },
  77    { OFF, "GL_EXT_blend_minmax",               F(EXT_blend_minmax) },
  78    { OFF, "GL_EXT_blend_subtract",             F(EXT_blend_subtract) },
  79    { ON,  "GL_EXT_clip_volume_hint",           F(EXT_clip_volume_hint) },
  80    { OFF, "GL_EXT_convolution",                F(EXT_convolution) },
  81    { ON,  "GL_EXT_compiled_vertex_array",      F(EXT_compiled_vertex_array) },
  82    { OFF, "GL_EXT_fog_coord",                  F(EXT_fog_coord) },
  83    { OFF, "GL_EXT_histogram",                  F(EXT_histogram) },
  84    { OFF, "GL_EXT_multi_draw_arrays",          F(EXT_multi_draw_arrays) },
  85    { ON,  "GL_EXT_packed_pixels",              F(EXT_packed_pixels) },
  86    { OFF, "GL_EXT_paletted_texture",           F(EXT_paletted_texture) },
  87    { OFF, "GL_EXT_point_parameters",           F(EXT_point_parameters) },
  88    { ON,  "GL_EXT_polygon_offset",             F(EXT_polygon_offset) },
  89    { ON,  "GL_EXT_rescale_normal",             F(EXT_rescale_normal) },
  90    { OFF, "GL_EXT_secondary_color",            F(EXT_secondary_color) },
  91    { OFF, "GL_EXT_shadow_funcs",               F(EXT_shadow_funcs) },
  92    { OFF, "GL_EXT_shared_texture_palette",     F(EXT_shared_texture_palette) },
  93    { OFF, "GL_EXT_stencil_wrap",               F(EXT_stencil_wrap) },
  94    { OFF, "GL_EXT_stencil_two_side",           F(EXT_stencil_two_side) },
  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_IBM_texture_mirrored_repeat",    F(ARB_texture_mirrored_repeat)},
 109    { OFF, "GL_INGR_blend_func_separate",       F(INGR_blend_func_separate) },
 110    { OFF, "GL_MESA_pack_invert",               F(MESA_pack_invert) },
 111    { OFF, "GL_MESA_packed_depth_stencil",      0 },
 112    { OFF, "GL_MESA_resize_buffers",            F(MESA_resize_buffers) },
 113    { OFF, "GL_MESA_ycbcr_texture",             F(MESA_ycbcr_texture) },
 114    { ON,  "GL_MESA_window_pos",                F(MESA_window_pos) },
 115    { OFF, "GL_NV_blend_square",                F(NV_blend_square) },
 116    { OFF, "GL_NV_point_sprite",                F(NV_point_sprite) },
 117    { OFF, "GL_NV_texture_rectangle",           F(NV_texture_rectangle) },
 118    { ON,  "GL_NV_texgen_reflection",           F(NV_texgen_reflection) },
 119    { OFF, "GL_NV_vertex_program",              F(NV_vertex_program) },
 120    { OFF, "GL_NV_vertex_program1_1",           F(NV_vertex_program1_1) },
 121    { OFF, "GL_SGI_color_matrix",               F(SGI_color_matrix) },
 122    { OFF, "GL_SGI_color_table",                F(SGI_color_table) },
 123    { OFF, "GL_SGIS_generate_mipmap",           F(SGIS_generate_mipmap) },
 124    { OFF, "GL_SGIS_pixel_texture",             F(SGIS_pixel_texture) },
 125    { OFF, "GL_SGIS_texture_border_clamp",      F(ARB_texture_border_clamp) },
 126    { OFF, "GL_SGIS_texture_edge_clamp",        F(SGIS_texture_edge_clamp) },
 127    { OFF, "GL_SGIX_depth_texture",             F(SGIX_depth_texture) },
 128    { OFF, "GL_SGIX_pixel_texture",             F(SGIX_pixel_texture) },
 129    { OFF, "GL_SGIX_shadow",                    F(SGIX_shadow) },
 130    { OFF, "GL_SGIX_shadow_ambient",            F(SGIX_shadow_ambient) },
 131    { OFF, "GL_3DFX_texture_compression_FXT1",  F(TDFX_texture_compression_FXT1) },
 132    { OFF, "GL_APPLE_client_storage",           F(APPLE_client_storage) }
 133 };
 134
 135
 136
 137
 138 /*
 139  * Enable all extensions suitable for a software-only renderer.
 140  * This is a convenience function used by the XMesa, OSMesa, GGI drivers, etc.
 141  */
 142 void
 143 _mesa_enable_sw_extensions(GLcontext *ctx)
 144 {
 145    const char *extensions[] = {
 146       "GL_ARB_depth_texture",
 147       "GL_ARB_imaging",
 148       "GL_ARB_multitexture",
 149       "GL_ARB_point_parameters",
 150       "GL_ARB_shadow",
 151       "GL_ARB_shadow_ambient",
 152       "GL_ARB_texture_border_clamp",
 153       "GL_ARB_texture_cube_map",
 154       "GL_ARB_texture_env_add",
 155       "GL_ARB_texture_env_combine",
 156       "GL_ARB_texture_env_crossbar",
 157       "GL_ARB_texture_env_dot3",
 158       "GL_ARB_texture_mirrored_repeat",
 159       "GL_ATI_texture_mirror_once",
 160       "GL_EXT_blend_color",
 161       "GL_EXT_blend_func_separate",
 162       "GL_EXT_blend_logic_op",
 163       "GL_EXT_blend_minmax",
 164       "GL_EXT_blend_subtract",
 165       "GL_EXT_convolution",
 166       "GL_EXT_fog_coord",
 167       "GL_EXT_histogram",
 168       "GL_EXT_paletted_texture",
 169       "GL_EXT_point_parameters",
 170       "GL_EXT_shadow_funcs",
 171       "GL_EXT_secondary_color",
 172       "GL_EXT_shared_texture_palette",
 173       "GL_EXT_stencil_wrap",
 174       "GL_EXT_stencil_two_side",
 175       "GL_EXT_texture_edge_clamp",
 176       "GL_EXT_texture_env_add",
 177       "GL_EXT_texture_env_combine",
 178       "GL_EXT_texture_env_dot3",
 179       "GL_EXT_texture_lod_bias",
 180       "GL_HP_occlusion_test",
 181       "GL_IBM_texture_mirrored_repeat",
 182       "GL_INGR_blend_func_separate",
 183       "GL_MESA_pack_invert",
 184       "GL_MESA_resize_buffers",
 185       "GL_MESA_ycbcr_texture",
 186       "GL_NV_blend_square",
 187       "GL_NV_point_sprite",
 188       "GL_NV_texture_rectangle",
 189       "GL_NV_texgen_reflection",
 190 #if FEATURE_NV_vertex_program
 191       "GL_NV_vertex_program",
 192       "GL_NV_vertex_program1_1",
 193 #endif
 194       "GL_SGI_color_matrix",
 195       "GL_SGI_color_table",
 196       "GL_SGIS_generate_mipmap",
 197       "GL_SGIS_pixel_texture",
 198       "GL_SGIS_texture_edge_clamp",
 199       "GL_SGIS_texture_border_clamp",
 200       "GL_SGIX_depth_texture",
 201       "GL_SGIX_pixel_texture",
 202       "GL_SGIX_shadow",
 203       "GL_SGIX_shadow_ambient",
 204       NULL
 205    };
 206    GLuint i;
 207
 208    for (i = 0; extensions[i]; i++) {
 209       _mesa_enable_extension(ctx, extensions[i]);
 210    }
 211 }
 212
 213
 214 /*
 215  * Enable GL_ARB_imaging and all the EXT extensions that are subsets of it.
 216  */
 217 void
 218 _mesa_enable_imaging_extensions(GLcontext *ctx)
 219 {
 220    const char *extensions[] = {
 221       "GL_ARB_imaging",
 222       "GL_EXT_blend_color",
 223       "GL_EXT_blend_minmax",
 224       "GL_EXT_blend_subtract",
 225       "GL_EXT_convolution",
 226       "GL_EXT_histogram",
 227       "GL_SGI_color_matrix",
 228       "GL_SGI_color_table",
 229       NULL
 230    };
 231    GLuint i;
 232
 233    for (i = 0; extensions[i]; i++) {
 234       _mesa_enable_extension(ctx, extensions[i]);
 235    }
 236 }
 237
 238
 239
 240 /*
 241  * Enable all OpenGL 1.3 features and extensions.
 242  */
 243 void
 244 _mesa_enable_1_3_extensions(GLcontext *ctx)
 245 {
 246    const char *extensions[] = {
 247       "GL_ARB_multisample",
 248       "GL_ARB_multitexture",
 249       "GL_ARB_texture_border_clamp",
 250       "GL_ARB_texture_compression",
 251       "GL_ARB_texture_cube_map",
 252       "GL_ARB_texture_env_add",
 253       "GL_ARB_texture_env_combine",
 254       "GL_ARB_texture_env_dot3",
 255       "GL_ARB_transpose_matrix",
 256       NULL
 257    };
 258    GLuint i;
 259
 260    for (i = 0; extensions[i]; i++) {
 261       _mesa_enable_extension(ctx, extensions[i]);
 262    }
 263 }
 264
 265
 266
 267 /*
 268  * Enable all OpenGL 1.4 features and extensions.
 269  */
 270 void
 271 _mesa_enable_1_4_extensions(GLcontext *ctx)
 272 {
 273    const char *extensions[] = {
 274       "GL_ARB_depth_texture",
 275       "GL_ARB_point_parameters",
 276       "GL_ARB_shadow",
 277       "GL_ARB_texture_env_crossbar",
 278       "GL_ARB_texture_mirrored_repeat",
 279       "GL_ARB_window_pos",
 280       "GL_EXT_blend_color",
 281       "GL_EXT_blend_func_separate",
 282       "GL_EXT_blend_logic_op",
 283       "GL_EXT_blend_minmax",
 284       "GL_EXT_blend_subtract",
 285       "GL_EXT_fog_coord",
 286       "GL_EXT_multi_draw_arrays",
 287       "GL_EXT_secondary_color",
 288       "GL_EXT_stencil_wrap",
 289       "GL_SGIS_generate_mipmap",
 290       NULL
 291    };
 292    GLuint i;
 293
 294    for (i = 0; extensions[i]; i++) {
 295       _mesa_enable_extension(ctx, extensions[i]);
 296    }
 297 }
 298
 299
 300
 301 /*
 302  * Add a new extenstion.  This would be called from a Mesa driver.
 303  */
 304 void
 305 _mesa_add_extension( GLcontext *ctx,
 306                      GLboolean enabled,
 307                      const char *name,
 308                      GLboolean *flag_ptr )
 309 {
 310    /* We should never try to add an extension after
 311     * _mesa_extensions_get_string() has been called!
 312     */
 313    assert(ctx->Extensions.ext_string == 0);
 314
 315    {
 316       struct extension *t = MALLOC_STRUCT(extension);
 317       t->enabled = enabled;
 318       strncpy(t->name, name, MAX_EXT_NAMELEN);
 319       t->name[MAX_EXT_NAMELEN] = 0;
 320       t->flag = flag_ptr;
 321       if (t->flag)
 322          *t->flag = enabled;
 323       insert_at_tail( ctx->Extensions.ext_list, t );
 324    }
 325 }
 326
 327
 328 /*
 329  * Either enable or disable the named extension.
 330  */
 331 static void
 332 set_extension( GLcontext *ctx, const char *name, GLint state )
 333 {
 334    /* XXX we should assert that ext_string is null.  We should never be
 335     * enabling/disabling extensions after _mesa_extensions_get_string()
 336     * has been called!
 337     */
 338    struct extension *i;
 339    foreach( i, ctx->Extensions.ext_list )
 340       if (strncmp(i->name, name, MAX_EXT_NAMELEN) == 0)
 341          break;
 342
 343    if (i == ctx->Extensions.ext_list) {
 344       /* this is an error.  Drivers should never try to enable/disable
 345        * an extension which is unknown to Mesa or wasn't added by calling
 346        * _mesa_add_extension().
 347        */
 348       return;
 349    }
 350
 351    if (i->flag)
 352       *(i->flag) = state;
 353    i->enabled = state;
 354 }
 355
 356
 357
 358 void
 359 _mesa_enable_extension( GLcontext *ctx, const char *name )
 360 {
 361    if (ctx->Extensions.ext_string == 0)
 362       set_extension( ctx, name, 1 );
 363 }
 364
 365
 366 void
 367 _mesa_disable_extension( GLcontext *ctx, const char *name )
 368 {
 369    if (ctx->Extensions.ext_string == 0)
 370       set_extension( ctx, name, 0 );
 371 }
 372
 373
 374 /*
 375  * Test if the named extension is enabled in this context.
 376  */
 377 GLboolean
 378 _mesa_extension_is_enabled( GLcontext *ctx, const char *name)
 379 {
 380    struct extension *i;
 381    foreach( i, ctx->Extensions.ext_list )
 382       if (strncmp(i->name, name, MAX_EXT_NAMELEN) == 0) {
 383          if (i->enabled)
 384             return GL_TRUE;
 385          else
 386             return GL_FALSE;
 387       }
 388
 389    return GL_FALSE;
 390 }
 391
 392
 393 void
 394 _mesa_extensions_dtr( GLcontext *ctx )
 395 {
 396    struct extension *i, *nexti;
 397
 398    if (ctx->Extensions.ext_string) {
 399       FREE( ctx->Extensions.ext_string );
 400       ctx->Extensions.ext_string = 0;
 401    }
 402
 403    if (ctx->Extensions.ext_list) {
 404       foreach_s( i, nexti, ctx->Extensions.ext_list ) {
 405          remove_from_list( i );
 406          FREE( i );
 407       }
 408
 409       FREE(ctx->Extensions.ext_list);
 410       ctx->Extensions.ext_list = 0;
 411    }
 412 }
 413
 414
 415 void
 416 _mesa_extensions_ctr( GLcontext *ctx )
 417 {
 418    GLuint i;
 419    GLboolean *base = (GLboolean *)&ctx->Extensions;
 420
 421    ctx->Extensions.ext_string = NULL;
 422    ctx->Extensions.ext_list = MALLOC_STRUCT(extension);
 423    make_empty_list( ctx->Extensions.ext_list );
 424
 425    for (i = 0 ; i < Elements(default_extensions) ; i++) {
 426       GLboolean *ptr = NULL;
 427
 428       if (default_extensions[i].flag_offset)
 429          ptr = base + default_extensions[i].flag_offset;
 430
 431       (void) _mesa_add_extension( ctx,
 432                                   default_extensions[i].enabled,
 433                                   default_extensions[i].name,
 434                                   ptr);
 435    }
 436 }
 437
 438
 439 const char *
 440 _mesa_extensions_get_string( GLcontext *ctx )
 441 {
 442    if (ctx->Extensions.ext_string == 0)
 443    {
 444       struct extension *i;
 445       char *str;
 446       GLuint len = 0;
 447       foreach (i, ctx->Extensions.ext_list)
 448          if (i->enabled)
 449             len += strlen(i->name) + 1;
 450
 451       if (len == 0)
 452          return "";
 453
 454       str = (char *)MALLOC(len * sizeof(char));
 455       ctx->Extensions.ext_string = str;
 456
 457       foreach (i, ctx->Extensions.ext_list)
 458          if (i->enabled) {
 459             strcpy(str, i->name);
 460             str += strlen(str);
 461             *str++ = ' ';
 462          }
 463
 464       *(str-1) = 0;
 465    }
 466
 467    return ctx->Extensions.ext_string;
 468 }