src/mesa/main/extensions.c

   1 /* $Id: extensions.c,v 1.14 1999/11/12 23:38:42 brianp Exp $ */
   2
   3 /*
   4  * Mesa 3-D graphics library
   5  * Version:  3.3
   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
  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 "types.h"
  37 #endif
  38
  39
  40 #define MAX_EXT_NAMELEN 80
  41
  42 struct extension {
  43    struct extension *next, *prev;
  44    int enabled;
  45    char name[MAX_EXT_NAMELEN+1];
  46    void (*notify)( GLcontext *, GLboolean );
  47 };
  48
  49
  50
  51 static struct { int enabled; const char *name; } default_extensions[] = {
  52    { ALWAYS_ENABLED, "GL_EXT_blend_color" },
  53    { DEFAULT_OFF,    "ARB_imaging" },
  54    { DEFAULT_ON,     "GL_EXT_blend_minmax" },
  55    { DEFAULT_ON,     "GL_EXT_blend_logic_op" },
  56    { DEFAULT_ON,     "GL_EXT_blend_subtract" },
  57    { DEFAULT_ON,     "GL_EXT_paletted_texture" },
  58    { DEFAULT_ON,     "GL_EXT_point_parameters" },
  59    { ALWAYS_ENABLED, "GL_EXT_polygon_offset" },
  60    { ALWAYS_ENABLED, "GL_EXT_vertex_array" },
  61    { ALWAYS_ENABLED, "GL_EXT_texture_object" },
  62    { DEFAULT_ON,     "GL_EXT_texture3D" },
  63    { ALWAYS_ENABLED, "GL_MESA_window_pos" },
  64    { ALWAYS_ENABLED, "GL_MESA_resize_buffers" },
  65    { ALWAYS_ENABLED, "GL_EXT_shared_texture_palette" },
  66    { ALWAYS_ENABLED, "GL_EXT_rescale_normal" },
  67    { ALWAYS_ENABLED, "GL_EXT_abgr" },
  68    { ALWAYS_ENABLED, "GL_SGIS_texture_edge_clamp" },
  69    { ALWAYS_ENABLED, "GL_EXT_stencil_wrap" },
  70    { DEFAULT_ON,     "GL_INGR_blend_func_separate" },
  71    { DEFAULT_ON,     "GL_ARB_multitexture" },
  72    { ALWAYS_ENABLED, "GL_NV_texgen_reflection" },
  73    { DEFAULT_ON,     "GL_PGI_misc_hints" },
  74    { DEFAULT_ON,     "GL_EXT_compiled_vertex_array" },
  75    { DEFAULT_OFF,    "GL_EXT_vertex_array_set" },
  76    { DEFAULT_ON,     "GL_EXT_clip_volume_hint" },
  77    { DEFAULT_ON,     "GL_EXT_texture_env_add" },
  78 };
  79
  80
  81 int gl_extensions_add( GLcontext *ctx,
  82                        int state,
  83                        const char *name,
  84                        void (*notify)(void) )
  85 {
  86    (void) notify;
  87
  88    if (ctx->Extensions.ext_string == 0)
  89    {
  90       struct extension *t = MALLOC_STRUCT(extension);
  91       t->enabled = state;
  92       strncpy(t->name, name, MAX_EXT_NAMELEN);
  93       t->name[MAX_EXT_NAMELEN] = 0;
  94       t->notify = (void (*)(GLcontext *, GLboolean)) notify;
  95       insert_at_tail( ctx->Extensions.ext_list, t );
  96       return 0;
  97    }
  98    return 1;
  99 }
 100
 101
 102 static int set_extension( GLcontext *ctx, const char *name, GLuint state )
 103 {
 104    struct extension *i;
 105    foreach( i, ctx->Extensions.ext_list )
 106       if (strncmp(i->name, name, MAX_EXT_NAMELEN) == 0)
 107          break;
 108
 109    if (i == ctx->Extensions.ext_list) return 1;
 110
 111    if (i->enabled && !(i->enabled & ALWAYS_ENABLED))
 112    {
 113       if (i->notify) i->notify( ctx, state );
 114       i->enabled = state;
 115    }
 116
 117    return 0;
 118 }
 119
 120
 121 int gl_extensions_enable( GLcontext *ctx, const char *name )
 122 {
 123    if (ctx->Extensions.ext_string == 0)
 124       return set_extension( ctx, name, 1 );
 125    return 1;
 126 }
 127
 128
 129 int gl_extensions_disable( GLcontext *ctx, const char *name )
 130 {
 131    if (ctx->Extensions.ext_string == 0)
 132       return set_extension( ctx, name, 0 );
 133    return 1;
 134 }
 135
 136
 137 /*
 138  * Test if the named extension is enabled in this context.
 139  */
 140 GLboolean gl_extension_is_enabled( GLcontext *ctx, const char *name)
 141 {
 142    struct extension *i;
 143    foreach( i, ctx->Extensions.ext_list )
 144       if (strncmp(i->name, name, MAX_EXT_NAMELEN) == 0) {
 145          if (i->enabled)
 146             return GL_TRUE;
 147          else
 148             return GL_FALSE;
 149       }
 150
 151    return GL_FALSE;
 152 }
 153
 154
 155 void gl_extensions_dtr( GLcontext *ctx )
 156 {
 157    struct extension *i, *nexti;
 158
 159    if (ctx->Extensions.ext_string) {
 160       FREE( ctx->Extensions.ext_string );
 161       ctx->Extensions.ext_string = 0;
 162    }
 163
 164    if (ctx->Extensions.ext_list) {
 165       foreach_s( i, nexti, ctx->Extensions.ext_list ) {
 166          remove_from_list( i );
 167          FREE( i );
 168       }
 169
 170       FREE(ctx->Extensions.ext_list);
 171       ctx->Extensions.ext_list = 0;
 172    }
 173 }
 174
 175
 176 void gl_extensions_ctr( GLcontext *ctx )
 177 {
 178    GLuint i;
 179
 180    ctx->Extensions.ext_string = 0;
 181    ctx->Extensions.ext_list = MALLOC_STRUCT(extension);
 182    make_empty_list( ctx->Extensions.ext_list );
 183
 184    for (i = 0 ; i < Elements(default_extensions) ; i++) {
 185       gl_extensions_add( ctx,
 186                          default_extensions[i].enabled,
 187                          default_extensions[i].name,
 188                          0 );
 189    }
 190 }
 191
 192
 193 const char *gl_extensions_get_string( GLcontext *ctx )
 194 {
 195    if (ctx->Extensions.ext_string == 0)
 196    {
 197       struct extension *i;
 198       char *str;
 199       GLuint len = 0;
 200       foreach (i, ctx->Extensions.ext_list)
 201          if (i->enabled)
 202             len += strlen(i->name) + 1;
 203
 204       if (len == 0)
 205          return "";
 206
 207       str = (char *)MALLOC(len * sizeof(char));
 208       ctx->Extensions.ext_string = str;
 209
 210       foreach (i, ctx->Extensions.ext_list)
 211          if (i->enabled) {
 212             strcpy(str, i->name);
 213             str += strlen(str);
 214             *str++ = ' ';
 215          }
 216
 217       *(str-1) = 0;
 218    }
 219
 220    return ctx->Extensions.ext_string;
 221 }
 222
 223
 224
 225 /*
 226  * Return the address of an extension function.
 227  * This is meant to be called by glXGetProcAddress(), wglGetProcAddress(),
 228  * or similar function.
 229  * NOTE: this function could be optimized to binary search a sorted
 230  * list of function names.
 231  */
 232 void (*gl_get_proc_address( const GLubyte *procName ))()
 233 {
 234    typedef void (*gl_function)();
 235    struct proc {
 236       const char *name;
 237       gl_function address;
 238    };
 239    static struct proc procTable[] = {
 240       /* OpenGL 1.1 functions */
 241       { "glEnableClientState", (gl_function) glEnableClientState },
 242       { "glDisableClientState", (gl_function) glDisableClientState },
 243       { "glPushClientAttrib", (gl_function) glPushClientAttrib },
 244       { "glPopClientAttrib", (gl_function) glPopClientAttrib },
 245       { "glIndexub", (gl_function) glIndexub },
 246       { "glIndexubv", (gl_function) glIndexubv },
 247       { "glVertexPointer", (gl_function) glVertexPointer },
 248       { "glNormalPointer", (gl_function) glNormalPointer },
 249       { "glColorPointer", (gl_function) glColorPointer },
 250       { "glIndexPointer", (gl_function) glIndexPointer },
 251       { "glTexCoordPointer", (gl_function) glTexCoordPointer },
 252       { "glEdgeFlagPointer", (gl_function) glEdgeFlagPointer },
 253       { "glGetPointerv", (gl_function) glGetPointerv },
 254       { "glArrayElement", (gl_function) glArrayElement },
 255       { "glDrawArrays", (gl_function) glDrawArrays },
 256       { "glDrawElements", (gl_function) glDrawElements },
 257       { "glInterleavedArrays", (gl_function) glInterleavedArrays },
 258       { "glGenTextures", (gl_function) glGenTextures },
 259       { "glDeleteTextures", (gl_function) glDeleteTextures },
 260       { "glBindTexture", (gl_function) glBindTexture },
 261       { "glPrioritizeTextures", (gl_function) glPrioritizeTextures },
 262       { "glAreTexturesResident", (gl_function) glAreTexturesResident },
 263       { "glIsTexture", (gl_function) glIsTexture },
 264       { "glTexSubImage1D", (gl_function) glTexSubImage1D },
 265       { "glTexSubImage2D", (gl_function) glTexSubImage2D },
 266       { "glCopyTexImage1D", (gl_function) glCopyTexImage1D },
 267       { "glCopyTexImage2D", (gl_function) glCopyTexImage2D },
 268       { "glCopyTexSubImage1D", (gl_function) glCopyTexSubImage1D },
 269       { "glCopyTexSubImage2D", (gl_function) glCopyTexSubImage2D },
 270
 271       /* OpenGL 1.2 functions */
 272       { "glDrawRangeElements", (gl_function) glDrawRangeElements },
 273       { "glTexImage3D", (gl_function) glTexImage3D },
 274       { "glTexSubImage3D", (gl_function) glTexSubImage3D },
 275       { "glCopyTexSubImage3D", (gl_function) glCopyTexSubImage3D },
 276       /* NOTE: 1.2 imaging subset functions not implemented in Mesa */
 277
 278       /* GL_EXT_blend_minmax */
 279       { "glBlendEquationEXT", (gl_function) glBlendEquationEXT },
 280
 281       /* GL_EXT_blend_color */
 282       { "glBlendColorEXT", (gl_function) glBlendColorEXT },
 283
 284       /* GL_EXT_polygon_offset */
 285       { "glPolygonOffsetEXT", (gl_function) glPolygonOffsetEXT },
 286
 287       /* GL_EXT_vertex_arrays */
 288       { "glVertexPointerEXT", (gl_function) glVertexPointerEXT },
 289       { "glNormalPointerEXT", (gl_function) glNormalPointerEXT },
 290       { "glColorPointerEXT", (gl_function) glColorPointerEXT },
 291       { "glIndexPointerEXT", (gl_function) glIndexPointerEXT },
 292       { "glTexCoordPointerEXT", (gl_function) glTexCoordPointerEXT },
 293       { "glEdgeFlagPointerEXT", (gl_function) glEdgeFlagPointerEXT },
 294       { "glGetPointervEXT", (gl_function) glGetPointervEXT },
 295       { "glArrayElementEXT", (gl_function) glArrayElementEXT },
 296       { "glDrawArraysEXT", (gl_function) glDrawArraysEXT },
 297
 298       /* GL_EXT_texture_object */
 299       { "glGenTexturesEXT", (gl_function) glGenTexturesEXT },
 300       { "glDeleteTexturesEXT", (gl_function) glDeleteTexturesEXT },
 301       { "glBindTextureEXT", (gl_function) glBindTextureEXT },
 302       { "glPrioritizeTexturesEXT", (gl_function) glPrioritizeTexturesEXT },
 303       { "glAreTexturesResidentEXT", (gl_function) glAreTexturesResidentEXT },
 304       { "glIsTextureEXT", (gl_function) glIsTextureEXT },
 305
 306       /* GL_EXT_texture3D */
 307       { "glTexImage3DEXT", (gl_function) glTexImage3DEXT },
 308       { "glTexSubImage3DEXT", (gl_function) glTexSubImage3DEXT },
 309       { "glCopyTexSubImage3DEXT", (gl_function) glCopyTexSubImage3DEXT },
 310
 311       /* GL_EXT_paletted_texture */
 312       { "glColorTableEXT", (gl_function) glColorTableEXT },
 313       { "glColorSubTableEXT", (gl_function) glColorSubTableEXT },
 314       { "glGetColorTableEXT", (gl_function) glGetColorTableEXT },
 315       { "glGetColorTableParameterfvEXT", (gl_function) glGetColorTableParameterfvEXT },
 316       { "glGetColorTableParameterivEXT", (gl_function) glGetColorTableParameterivEXT },
 317
 318       /* GL_ARB_multitexture */
 319       { "glActiveTextureARB", (gl_function) glActiveTextureARB },
 320       { "glClientActiveTextureARB", (gl_function) glClientActiveTextureARB },
 321       { "glMultiTexCoord1dARB", (gl_function) glMultiTexCoord1dARB },
 322       { "glMultiTexCoord1dvARB", (gl_function) glMultiTexCoord1dvARB },
 323       { "glMultiTexCoord1fARB", (gl_function) glMultiTexCoord1fARB },
 324       { "glMultiTexCoord1fvARB", (gl_function) glMultiTexCoord1fvARB },
 325       { "glMultiTexCoord1iARB", (gl_function) glMultiTexCoord1iARB },
 326       { "glMultiTexCoord1ivARB", (gl_function) glMultiTexCoord1ivARB },
 327       { "glMultiTexCoord1sARB", (gl_function) glMultiTexCoord1sARB },
 328       { "glMultiTexCoord1svARB", (gl_function) glMultiTexCoord1svARB },
 329       { "glMultiTexCoord2dARB", (gl_function) glMultiTexCoord2dARB },
 330       { "glMultiTexCoord2dvARB", (gl_function) glMultiTexCoord2dvARB },
 331       { "glMultiTexCoord2fARB", (gl_function) glMultiTexCoord2fARB },
 332       { "glMultiTexCoord2fvARB", (gl_function) glMultiTexCoord2fvARB },
 333       { "glMultiTexCoord2iARB", (gl_function) glMultiTexCoord2iARB },
 334       { "glMultiTexCoord2ivARB", (gl_function) glMultiTexCoord2ivARB },
 335       { "glMultiTexCoord2sARB", (gl_function) glMultiTexCoord2sARB },
 336       { "glMultiTexCoord2svARB", (gl_function) glMultiTexCoord2svARB },
 337       { "glMultiTexCoord3dARB", (gl_function) glMultiTexCoord3dARB },
 338       { "glMultiTexCoord3dvARB", (gl_function) glMultiTexCoord3dvARB },
 339       { "glMultiTexCoord3fARB", (gl_function) glMultiTexCoord3fARB },
 340       { "glMultiTexCoord3fvARB", (gl_function) glMultiTexCoord3fvARB },
 341       { "glMultiTexCoord3iARB", (gl_function) glMultiTexCoord3iARB },
 342       { "glMultiTexCoord3ivARB", (gl_function) glMultiTexCoord3ivARB },
 343       { "glMultiTexCoord3sARB", (gl_function) glMultiTexCoord3sARB },
 344       { "glMultiTexCoord3svARB", (gl_function) glMultiTexCoord3svARB },
 345       { "glMultiTexCoord4dARB", (gl_function) glMultiTexCoord4dARB },
 346       { "glMultiTexCoord4dvARB", (gl_function) glMultiTexCoord4dvARB },
 347       { "glMultiTexCoord4fARB", (gl_function) glMultiTexCoord4fARB },
 348       { "glMultiTexCoord4fvARB", (gl_function) glMultiTexCoord4fvARB },
 349       { "glMultiTexCoord4iARB", (gl_function) glMultiTexCoord4iARB },
 350       { "glMultiTexCoord4ivARB", (gl_function) glMultiTexCoord4ivARB },
 351       { "glMultiTexCoord4sARB", (gl_function) glMultiTexCoord4sARB },
 352       { "glMultiTexCoord4svARB", (gl_function) glMultiTexCoord4svARB },
 353
 354       /* GL_EXT_point_parameters */
 355       { "glPointParameterfEXT", (gl_function) glPointParameterfEXT },
 356       { "glPointParameterfvEXT", (gl_function) glPointParameterfvEXT },
 357
 358       /* GL_INGR_blend_func_separate */
 359       { "glBlendFuncSeparateINGR", (gl_function) glBlendFuncSeparateINGR },
 360
 361       /* GL_MESA_window_pos */
 362       { "glWindowPos2iMESA", (gl_function) glWindowPos2iMESA },
 363       { "glWindowPos2sMESA", (gl_function) glWindowPos2sMESA },
 364       { "glWindowPos2fMESA", (gl_function) glWindowPos2fMESA },
 365       { "glWindowPos2dMESA", (gl_function) glWindowPos2dMESA },
 366       { "glWindowPos2ivMESA", (gl_function) glWindowPos2ivMESA },
 367       { "glWindowPos2svMESA", (gl_function) glWindowPos2svMESA },
 368       { "glWindowPos2fvMESA", (gl_function) glWindowPos2fvMESA },
 369       { "glWindowPos2dvMESA", (gl_function) glWindowPos2dvMESA },
 370       { "glWindowPos3iMESA", (gl_function) glWindowPos3iMESA },
 371       { "glWindowPos3sMESA", (gl_function) glWindowPos3sMESA },
 372       { "glWindowPos3fMESA", (gl_function) glWindowPos3fMESA },
 373       { "glWindowPos3dMESA", (gl_function) glWindowPos3dMESA },
 374       { "glWindowPos3ivMESA", (gl_function) glWindowPos3ivMESA },
 375       { "glWindowPos3svMESA", (gl_function) glWindowPos3svMESA },
 376       { "glWindowPos3fvMESA", (gl_function) glWindowPos3fvMESA },
 377       { "glWindowPos3dvMESA", (gl_function) glWindowPos3dvMESA },
 378       { "glWindowPos4iMESA", (gl_function) glWindowPos4iMESA },
 379       { "glWindowPos4sMESA", (gl_function) glWindowPos4sMESA },
 380       { "glWindowPos4fMESA", (gl_function) glWindowPos4fMESA },
 381       { "glWindowPos4dMESA", (gl_function) glWindowPos4dMESA },
 382       { "glWindowPos4ivMESA", (gl_function) glWindowPos4ivMESA },
 383       { "glWindowPos4svMESA", (gl_function) glWindowPos4svMESA },
 384       { "glWindowPos4fvMESA", (gl_function) glWindowPos4fvMESA },
 385       { "glWindowPos4dvMESA", (gl_function) glWindowPos4dvMESA },
 386
 387       /* GL_MESA_resize_buffers */
 388       { "glResizeBuffersMESA", (gl_function) glResizeBuffersMESA },
 389
 390       /* GL_EXT_compiled_vertex_array */
 391       { "glLockArraysEXT", (gl_function) glLockArraysEXT },
 392       { "glUnlockArraysEXT", (gl_function) glUnlockArraysEXT },
 393
 394       { NULL, NULL } /* end of list token */
 395    };
 396    GLuint i;
 397
 398    for (i = 0; procTable[i].address; i++) {
 399       if (strcmp((const char *) procName, procTable[i].name) == 0)
 400          return procTable[i].address;
 401    }
 402
 403    return NULL;
 404 }