src/mesa/main/extensions.c

   1 /* $Id: extensions.c,v 1.72 2002/04/02 16:15:17 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_point_parameters",           F(EXT_point_parameters) },
  64    { OFF, "GL_ARB_shadow",                     F(ARB_shadow) },
  65    { OFF, "GL_ARB_shadow_ambient",             F(SGIX_shadow_ambient) },
  66    { OFF, "GL_ARB_texture_border_clamp",       F(ARB_texture_border_clamp) },
  67    { OFF, "GL_ARB_texture_compression",        F(ARB_texture_compression) },
  68    { OFF, "GL_ARB_texture_cube_map",           F(ARB_texture_cube_map) },
  69    { OFF, "GL_ARB_texture_env_add",            F(EXT_texture_env_add) },
  70    { OFF, "GL_ARB_texture_env_combine",        F(ARB_texture_env_combine) },
  71    { OFF, "GL_ARB_texture_env_dot3",           F(ARB_texture_env_dot3) },
  72    { OFF, "GL_ARB_texture_mirrored_repeat",    F(ARB_texture_mirrored_repeat)},
  73    { ON,  "GL_ARB_transpose_matrix",           0 },
  74    { ON,  "GL_ARB_window_pos",                 F(ARB_window_pos) },
  75    { ON,  "GL_EXT_abgr",                       0 },
  76    { ON,  "GL_EXT_bgra",                       0 },
  77    { OFF, "GL_EXT_blend_color",                F(EXT_blend_color) },
  78    { OFF, "GL_EXT_blend_func_separate",        F(EXT_blend_func_separate) },
  79    { OFF, "GL_EXT_blend_logic_op",             F(EXT_blend_logic_op) },
  80    { OFF, "GL_EXT_blend_minmax",               F(EXT_blend_minmax) },
  81    { OFF, "GL_EXT_blend_subtract",             F(EXT_blend_subtract) },
  82    { ON,  "GL_EXT_clip_volume_hint",           F(EXT_clip_volume_hint) },
  83    { OFF, "GL_EXT_cull_vertex",                0 },
  84    { OFF, "GL_EXT_convolution",                F(EXT_convolution) },
  85    { ON,  "GL_EXT_compiled_vertex_array",      F(EXT_compiled_vertex_array) },
  86    { OFF, "GL_EXT_fog_coord",                  F(EXT_fog_coord) },
  87    { OFF, "GL_EXT_histogram",                  F(EXT_histogram) },
  88    { ON,  "GL_EXT_packed_pixels",              F(EXT_packed_pixels) },
  89    { OFF, "GL_EXT_paletted_texture",           F(EXT_paletted_texture) },
  90    { OFF, "GL_EXT_point_parameters",           F(EXT_point_parameters) },
  91    { ON,  "GL_EXT_polygon_offset",             F(EXT_polygon_offset) },
  92    { ON,  "GL_EXT_rescale_normal",             F(EXT_rescale_normal) },
  93    { OFF, "GL_EXT_secondary_color",            F(EXT_secondary_color) },
  94    { OFF, "GL_EXT_shadow_funcs",               F(EXT_shadow_funcs) },
  95    { OFF, "GL_EXT_shared_texture_palette",     F(EXT_shared_texture_palette) },
  96    { OFF, "GL_EXT_stencil_wrap",               F(EXT_stencil_wrap) },
  97    { ON,  "GL_EXT_texture3D",                  F(EXT_texture3D) },
  98    { OFF, "GL_EXT_texture_compression_s3tc",   F(EXT_texture_compression_s3tc) },
  99    { OFF, "GL_EXT_texture_edge_clamp",         F(SGIS_texture_edge_clamp) },
 100    { OFF, "GL_EXT_texture_env_add",            F(EXT_texture_env_add) },
 101    { OFF, "GL_EXT_texture_env_combine",        F(EXT_texture_env_combine) },
 102    { OFF, "GL_EXT_texture_env_dot3",           F(EXT_texture_env_dot3) },
 103    { OFF, "GL_EXT_texture_filter_anisotropic", F(EXT_texture_filter_anisotropic) },
 104    { ON,  "GL_EXT_texture_object",             F(EXT_texture_object) },
 105    { OFF, "GL_EXT_texture_lod_bias",           F(EXT_texture_lod_bias) },
 106    { ON,  "GL_EXT_vertex_array",               0 },
 107    { OFF, "GL_EXT_vertex_array_set",           F(EXT_vertex_array_set) },
 108    { OFF, "GL_HP_occlusion_test",              F(HP_occlusion_test) },
 109    { ON,  "GL_IBM_rasterpos_clip",             F(IBM_rasterpos_clip) },
 110    { OFF, "GL_INGR_blend_func_separate",       F(INGR_blend_func_separate) },
 111    { OFF, "GL_MESA_packed_depth_stencil",      0 },
 112    { OFF, "GL_MESA_resize_buffers",            F(MESA_resize_buffers) },
 113    { OFF, "GL_MESA_sprite_point",              F(MESA_sprite_point) },
 114    { ON,  "GL_MESA_window_pos",                F(MESA_window_pos) },
 115    { OFF, "GL_NV_blend_square",                F(NV_blend_square) },
 116    { ON,  "GL_NV_texgen_reflection",           F(NV_texgen_reflection) },
 117    { OFF, "GL_NV_vertex_program",              F(NV_vertex_program) },
 118    { OFF, "GL_NV_vertex_program1_1",           F(NV_vertex_program1_1) },
 119    { OFF, "GL_SGI_color_matrix",               F(SGI_color_matrix) },
 120    { OFF, "GL_SGI_color_table",                F(SGI_color_table) },
 121    { OFF, "GL_SGIS_generate_mipmap",           F(SGIS_generate_mipmap) },
 122    { OFF, "GL_SGIS_pixel_texture",             F(SGIS_pixel_texture) },
 123    { OFF, "GL_SGIS_texture_border_clamp",      F(ARB_texture_border_clamp) },
 124    { OFF, "GL_SGIS_texture_edge_clamp",        F(SGIS_texture_edge_clamp) },
 125    { OFF, "GL_SGIX_depth_texture",             F(SGIX_depth_texture) },
 126    { OFF, "GL_SGIX_pixel_texture",             F(SGIX_pixel_texture) },
 127    { OFF, "GL_SGIX_shadow",                    F(SGIX_shadow) },
 128    { OFF, "GL_SGIX_shadow_ambient",            F(SGIX_shadow_ambient) },
 129    { OFF, "GL_3DFX_texture_compression_FXT1",  F(_3DFX_texture_compression_FXT1) }
 130 };
 131
 132
 133
 134
 135 /*
 136  * Enable all extensions suitable for a software-only renderer.
 137  * This is a convenience function used by the XMesa, OSMesa, GGI drivers, etc.
 138  */
 139 void
 140 _mesa_enable_sw_extensions(GLcontext *ctx)
 141 {
 142    const char *extensions[] = {
 143       "GL_ARB_depth_texture",
 144       "GL_ARB_imaging",
 145       "GL_ARB_multitexture",
 146       "GL_ARB_point_parameters",
 147       "GL_ARB_shadow",
 148       "GL_ARB_shadow_ambient",
 149       "GL_ARB_texture_border_clamp",
 150       "GL_ARB_texture_cube_map",
 151       "GL_ARB_texture_env_add",
 152       "GL_ARB_texture_env_combine",
 153       "GL_ARB_texture_env_dot3",
 154       "GL_ARB_texture_mirrored_repeat",
 155       "GL_EXT_blend_color",
 156       "GL_EXT_blend_func_separate",
 157       "GL_EXT_blend_logic_op",
 158       "GL_EXT_blend_minmax",
 159       "GL_EXT_blend_subtract",
 160       "GL_EXT_convolution",
 161       "GL_EXT_fog_coord",
 162       "GL_EXT_histogram",
 163       "GL_EXT_paletted_texture",
 164       "GL_EXT_point_parameters",
 165       "GL_EXT_shadow_funcs",
 166       "GL_EXT_secondary_color",
 167       "GL_EXT_shared_texture_palette",
 168       "GL_EXT_stencil_wrap",
 169       "GL_EXT_texture_edge_clamp",
 170       "GL_EXT_texture_env_add",
 171       "GL_EXT_texture_env_combine",
 172       "GL_EXT_texture_env_dot3",
 173       "GL_EXT_texture_lod_bias",
 174       "GL_HP_occlusion_test",
 175       "GL_INGR_blend_func_separate",
 176       "GL_MESA_resize_buffers",
 177       "GL_NV_blend_square",
 178       "GL_NV_texgen_reflection",
 179       "GL_NV_vertex_program",
 180       "GL_NV_vertex_program1_1",
 181       "GL_SGI_color_matrix",
 182       "GL_SGI_color_table",
 183       "GL_SGIS_generate_mipmap",
 184       "GL_SGIS_pixel_texture",
 185       "GL_SGIS_texture_edge_clamp",
 186       "GL_SGIS_texture_border_clamp",
 187       "GL_SGIX_depth_texture",
 188       "GL_SGIX_pixel_texture",
 189       "GL_SGIX_shadow",
 190       "GL_SGIX_shadow_ambient",
 191       NULL
 192    };
 193    GLuint i;
 194
 195    for (i = 0; extensions[i]; i++) {
 196       _mesa_enable_extension(ctx, extensions[i]);
 197    }
 198 }
 199
 200
 201 /*
 202  * Enable GL_ARB_imaging and all the EXT extensions that are subsets of it.
 203  */
 204 void
 205 _mesa_enable_imaging_extensions(GLcontext *ctx)
 206 {
 207    const char *extensions[] = {
 208       "GL_ARB_imaging",
 209       "GL_EXT_blend_color",
 210       "GL_EXT_blend_minmax",
 211       "GL_EXT_blend_subtract",
 212       "GL_EXT_convolution",
 213       "GL_EXT_histogram",
 214       "GL_SGI_color_matrix",
 215       "GL_SGI_color_table",
 216       NULL
 217    };
 218    GLuint i;
 219
 220    for (i = 0; extensions[i]; i++) {
 221       _mesa_enable_extension(ctx, extensions[i]);
 222    }
 223 }
 224
 225
 226
 227 /*
 228  * Enable all OpenGL 1.3 features and extensions.
 229  */
 230 void
 231 _mesa_enable_1_3_extensions(GLcontext *ctx)
 232 {
 233    const char *extensions[] = {
 234       "GL_ARB_multisample",
 235       "GL_ARB_multitexture",
 236       "GL_ARB_texture_border_clamp",
 237       "GL_ARB_texture_compression",
 238       "GL_ARB_texture_cube_map",
 239       "GL_ARB_texture_env_add",
 240       "GL_ARB_texture_env_combine",
 241       "GL_ARB_texture_env_dot3",
 242       "GL_ARB_transpose_matrix",
 243       NULL
 244    };
 245    GLuint i;
 246
 247    for (i = 0; extensions[i]; i++) {
 248       _mesa_enable_extension(ctx, extensions[i]);
 249    }
 250 }
 251
 252
 253
 254 /*
 255  * Add a new extenstion.  This would be called from a Mesa driver.
 256  */
 257 void
 258 _mesa_add_extension( GLcontext *ctx,
 259                      GLboolean enabled,
 260                      const char *name,
 261                      GLboolean *flag_ptr )
 262 {
 263    /* We should never try to add an extension after
 264     * _mesa_extensions_get_string() has been called!
 265     */
 266    assert(ctx->Extensions.ext_string == 0);
 267
 268    {
 269       struct extension *t = MALLOC_STRUCT(extension);
 270       t->enabled = enabled;
 271       strncpy(t->name, name, MAX_EXT_NAMELEN);
 272       t->name[MAX_EXT_NAMELEN] = 0;
 273       t->flag = flag_ptr;
 274       if (t->flag)
 275          *t->flag = enabled;
 276       insert_at_tail( ctx->Extensions.ext_list, t );
 277    }
 278 }
 279
 280
 281 /*
 282  * Either enable or disable the named extension.
 283  */
 284 static void
 285 set_extension( GLcontext *ctx, const char *name, GLint state )
 286 {
 287    /* XXX we should assert that ext_string is null.  We should never be
 288     * enabling/disabling extensions after _mesa_extensions_get_string()
 289     * has been called!
 290     */
 291    struct extension *i;
 292    foreach( i, ctx->Extensions.ext_list )
 293       if (strncmp(i->name, name, MAX_EXT_NAMELEN) == 0)
 294          break;
 295
 296    if (i == ctx->Extensions.ext_list) {
 297       /* this is an error.  Drivers should never try to enable/disable
 298        * an extension which is unknown to Mesa or wasn't added by calling
 299        * _mesa_add_extension().
 300        */
 301       return;
 302    }
 303
 304    if (i->flag)
 305       *(i->flag) = state;
 306    i->enabled = state;
 307 }
 308
 309
 310
 311 void
 312 _mesa_enable_extension( GLcontext *ctx, const char *name )
 313 {
 314    if (ctx->Extensions.ext_string == 0)
 315       set_extension( ctx, name, 1 );
 316 }
 317
 318
 319 void
 320 _mesa_disable_extension( GLcontext *ctx, const char *name )
 321 {
 322    if (ctx->Extensions.ext_string == 0)
 323       set_extension( ctx, name, 0 );
 324 }
 325
 326
 327 /*
 328  * Test if the named extension is enabled in this context.
 329  */
 330 GLboolean
 331 _mesa_extension_is_enabled( GLcontext *ctx, const char *name)
 332 {
 333    struct extension *i;
 334    foreach( i, ctx->Extensions.ext_list )
 335       if (strncmp(i->name, name, MAX_EXT_NAMELEN) == 0) {
 336          if (i->enabled)
 337             return GL_TRUE;
 338          else
 339             return GL_FALSE;
 340       }
 341
 342    return GL_FALSE;
 343 }
 344
 345
 346 void
 347 _mesa_extensions_dtr( GLcontext *ctx )
 348 {
 349    struct extension *i, *nexti;
 350
 351    if (ctx->Extensions.ext_string) {
 352       FREE( ctx->Extensions.ext_string );
 353       ctx->Extensions.ext_string = 0;
 354    }
 355
 356    if (ctx->Extensions.ext_list) {
 357       foreach_s( i, nexti, ctx->Extensions.ext_list ) {
 358          remove_from_list( i );
 359          FREE( i );
 360       }
 361
 362       FREE(ctx->Extensions.ext_list);
 363       ctx->Extensions.ext_list = 0;
 364    }
 365 }
 366
 367
 368 void
 369 _mesa_extensions_ctr( GLcontext *ctx )
 370 {
 371    GLuint i;
 372    GLboolean *base = (GLboolean *)&ctx->Extensions;
 373
 374    ctx->Extensions.ext_string = NULL;
 375    ctx->Extensions.ext_list = MALLOC_STRUCT(extension);
 376    make_empty_list( ctx->Extensions.ext_list );
 377
 378    for (i = 0 ; i < Elements(default_extensions) ; i++) {
 379       GLboolean *ptr = NULL;
 380
 381       if (default_extensions[i].flag_offset)
 382          ptr = base + default_extensions[i].flag_offset;
 383
 384       (void) _mesa_add_extension( ctx,
 385                                   default_extensions[i].enabled,
 386                                   default_extensions[i].name,
 387                                   ptr);
 388    }
 389 }
 390
 391
 392 const char *
 393 _mesa_extensions_get_string( GLcontext *ctx )
 394 {
 395    if (ctx->Extensions.ext_string == 0)
 396    {
 397       struct extension *i;
 398       char *str;
 399       GLuint len = 0;
 400       foreach (i, ctx->Extensions.ext_list)
 401          if (i->enabled)
 402             len += strlen(i->name) + 1;
 403
 404       if (len == 0)
 405          return "";
 406
 407       str = (char *)MALLOC(len * sizeof(char));
 408       ctx->Extensions.ext_string = str;
 409
 410       foreach (i, ctx->Extensions.ext_list)
 411          if (i->enabled) {
 412             strcpy(str, i->name);
 413             str += strlen(str);
 414             *str++ = ' ';
 415          }
 416
 417       *(str-1) = 0;
 418    }
 419
 420    return ctx->Extensions.ext_string;
 421 }