src/mesa/main/extensions.c

   1 /* $Id: extensions.c,v 1.9 1999/10/16 11:30:31 brianp 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
  27
  28 #include <stdlib.h>
  29 #include "context.h"
  30 #include "extensions.h"
  31 #include "simple_list.h"
  32 #include "types.h"
  33
  34
  35 #define MAX_EXT_NAMELEN 80
  36
  37 struct extension {
  38    struct extension *next, *prev;
  39    int enabled;
  40    char name[MAX_EXT_NAMELEN+1];
  41    void (*notify)( GLcontext *, GLboolean );
  42 };
  43
  44
  45
  46 static struct { int enabled; const char *name; } default_extensions[] = {
  47    { ALWAYS_ENABLED, "GL_EXT_blend_color" },
  48    { DEFAULT_OFF,    "ARB_imaging" },
  49    { DEFAULT_ON,     "GL_EXT_blend_minmax" },
  50    { DEFAULT_ON,     "GL_EXT_blend_logic_op" },
  51    { DEFAULT_ON,     "GL_EXT_blend_subtract" },
  52    { DEFAULT_ON,     "GL_EXT_paletted_texture" },
  53    { DEFAULT_ON,     "GL_EXT_point_parameters" },
  54    { ALWAYS_ENABLED, "GL_EXT_polygon_offset" },
  55    { ALWAYS_ENABLED, "GL_EXT_vertex_array" },
  56    { ALWAYS_ENABLED, "GL_EXT_texture_object" },
  57    { DEFAULT_ON,     "GL_EXT_texture3D" },
  58    { ALWAYS_ENABLED, "GL_MESA_window_pos" },
  59    { ALWAYS_ENABLED, "GL_MESA_resize_buffers" },
  60    { ALWAYS_ENABLED, "GL_EXT_shared_texture_palette" },
  61    { ALWAYS_ENABLED, "GL_EXT_rescale_normal" },
  62    { ALWAYS_ENABLED, "GL_EXT_abgr" },
  63    { ALWAYS_ENABLED, "GL_SGIS_texture_edge_clamp" },
  64    { ALWAYS_ENABLED, "GL_EXT_stencil_wrap" },
  65    { DEFAULT_ON,     "GL_INGR_blend_func_separate" },
  66    { DEFAULT_ON,     "GL_ARB_multitexture" },
  67    { ALWAYS_ENABLED, "GL_NV_texgen_reflection" },
  68    { DEFAULT_ON,     "GL_PGI_misc_hints" },
  69    { DEFAULT_ON,     "GL_EXT_compiled_vertex_array" },
  70    { DEFAULT_OFF,    "GL_EXT_vertex_array_set" },
  71    { DEFAULT_ON,     "GL_EXT_clip_volume_hint" },
  72 };
  73
  74
  75 int gl_extensions_add( GLcontext *ctx,
  76                        int state,
  77                        const char *name,
  78                        void (*notify)(void) )
  79 {
  80    (void) notify;
  81
  82    if (ctx->Extensions.ext_string == 0)
  83    {
  84       struct extension *t = MALLOC_STRUCT(extension);
  85       t->enabled = state;
  86       strncpy(t->name, name, MAX_EXT_NAMELEN);
  87       t->name[MAX_EXT_NAMELEN] = 0;
  88       t->notify = (void (*)(GLcontext *, GLboolean)) notify;
  89       insert_at_tail( ctx->Extensions.ext_list, t );
  90       return 0;
  91    }
  92    return 1;
  93 }
  94
  95
  96 static int set_extension( GLcontext *ctx, const char *name, GLuint state )
  97 {
  98    struct extension *i;
  99    foreach( i, ctx->Extensions.ext_list )
 100       if (strncmp(i->name, name, MAX_EXT_NAMELEN) == 0)
 101          break;
 102
 103    if (i == ctx->Extensions.ext_list) return 1;
 104
 105    if (i->enabled && !(i->enabled & ALWAYS_ENABLED))
 106    {
 107       if (i->notify) i->notify( ctx, state );
 108       i->enabled = state;
 109    }
 110
 111    return 0;
 112 }
 113
 114
 115 int gl_extensions_enable( GLcontext *ctx, const char *name )
 116 {
 117    if (ctx->Extensions.ext_string == 0)
 118       return set_extension( ctx, name, 1 );
 119    return 1;
 120 }
 121
 122
 123 int gl_extensions_disable( GLcontext *ctx, const char *name )
 124 {
 125    if (ctx->Extensions.ext_string == 0)
 126       return set_extension( ctx, name, 0 );
 127    return 1;
 128 }
 129
 130
 131 void gl_extensions_dtr( GLcontext *ctx )
 132 {
 133    struct extension *i, *nexti;
 134
 135    if (ctx->Extensions.ext_string) {
 136       FREE( ctx->Extensions.ext_string );
 137       ctx->Extensions.ext_string = 0;
 138    }
 139
 140    if (ctx->Extensions.ext_list) {
 141       foreach_s( i, nexti, ctx->Extensions.ext_list ) {
 142          remove_from_list( i );
 143          FREE( i );
 144       }
 145
 146       FREE(ctx->Extensions.ext_list);
 147       ctx->Extensions.ext_list = 0;
 148    }
 149 }
 150
 151
 152 void gl_extensions_ctr( GLcontext *ctx )
 153 {
 154    GLuint i;
 155
 156    ctx->Extensions.ext_string = 0;
 157    ctx->Extensions.ext_list = MALLOC_STRUCT(extension);
 158    make_empty_list( ctx->Extensions.ext_list );
 159
 160    for (i = 0 ; i < Elements(default_extensions) ; i++) {
 161       gl_extensions_add( ctx,
 162                          default_extensions[i].enabled,
 163                          default_extensions[i].name,
 164                          0 );
 165    }
 166 }
 167
 168
 169 const char *gl_extensions_get_string( GLcontext *ctx )
 170 {
 171    if (ctx->Extensions.ext_string == 0)
 172    {
 173       struct extension *i;
 174       char *str;
 175       GLuint len = 0;
 176       foreach (i, ctx->Extensions.ext_list)
 177          if (i->enabled)
 178             len += strlen(i->name) + 1;
 179
 180       if (len == 0)
 181          return "";
 182
 183       str = (char *)MALLOC(len * sizeof(char));
 184       ctx->Extensions.ext_string = str;
 185
 186       foreach (i, ctx->Extensions.ext_list)
 187          if (i->enabled) {
 188             strcpy(str, i->name);
 189             str += strlen(str);
 190             *str++ = ' ';
 191          }
 192
 193       *(str-1) = 0;
 194    }
 195
 196    return ctx->Extensions.ext_string;
 197 }
 198
 199
 200
 201 /*
 202  * Return the address of an extension function.
 203  * This is meant to be called by glXGetProcAddress(), wglGetProcAddress(),
 204  * or similar function.
 205  * NOTE: this function could be optimized to binary search a sorted
 206  * list of function names.
 207  */
 208 void (*gl_get_proc_address( const GLubyte *procName ))()
 209 {
 210    typedef void (*gl_function)();
 211    struct proc {
 212       const char *name;
 213       gl_function address;
 214    };
 215    static struct proc procTable[] = {
 216       /* OpenGL 1.1 functions */
 217       { "glEnableClientState", (gl_function) glEnableClientState },
 218       { "glDisableClientState", (gl_function) glDisableClientState },
 219       { "glPushClientAttrib", (gl_function) glPushClientAttrib },
 220       { "glPopClientAttrib", (gl_function) glPopClientAttrib },
 221       { "glIndexub", (gl_function) glIndexub },
 222       { "glIndexubv", (gl_function) glIndexubv },
 223       { "glVertexPointer", (gl_function) glVertexPointer },
 224       { "glNormalPointer", (gl_function) glNormalPointer },
 225       { "glColorPointer", (gl_function) glColorPointer },
 226       { "glIndexPointer", (gl_function) glIndexPointer },
 227       { "glTexCoordPointer", (gl_function) glTexCoordPointer },
 228       { "glEdgeFlagPointer", (gl_function) glEdgeFlagPointer },
 229       { "glGetPointerv", (gl_function) glGetPointerv },
 230       { "glArrayElement", (gl_function) glArrayElement },
 231       { "glDrawArrays", (gl_function) glDrawArrays },
 232       { "glDrawElements", (gl_function) glDrawElements },
 233       { "glInterleavedArrays", (gl_function) glInterleavedArrays },
 234       { "glGenTextures", (gl_function) glGenTextures },
 235       { "glDeleteTextures", (gl_function) glDeleteTextures },
 236       { "glBindTexture", (gl_function) glBindTexture },
 237       { "glPrioritizeTextures", (gl_function) glPrioritizeTextures },
 238       { "glAreTexturesResident", (gl_function) glAreTexturesResident },
 239       { "glIsTexture", (gl_function) glIsTexture },
 240       { "glTexSubImage1D", (gl_function) glTexSubImage1D },
 241       { "glTexSubImage2D", (gl_function) glTexSubImage2D },
 242       { "glCopyTexImage1D", (gl_function) glCopyTexImage1D },
 243       { "glCopyTexImage2D", (gl_function) glCopyTexImage2D },
 244       { "glCopyTexSubImage1D", (gl_function) glCopyTexSubImage1D },
 245       { "glCopyTexSubImage2D", (gl_function) glCopyTexSubImage2D },
 246
 247       /* OpenGL 1.2 functions */
 248       { "glDrawRangeElements", (gl_function) glDrawRangeElements },
 249       { "glTexImage3D", (gl_function) glTexImage3D },
 250       { "glTexSubImage3D", (gl_function) glTexSubImage3D },
 251       { "glCopyTexSubImage3D", (gl_function) glCopyTexSubImage3D },
 252       /* NOTE: 1.2 imaging subset functions not implemented in Mesa */
 253
 254       /* GL_EXT_blend_minmax */
 255       { "glBlendEquationEXT", (gl_function) glBlendEquationEXT },
 256
 257       /* GL_EXT_blend_color */
 258       { "glBlendColorEXT", (gl_function) glBlendColorEXT },
 259
 260       /* GL_EXT_polygon_offset */
 261       { "glPolygonOffsetEXT", (gl_function) glPolygonOffsetEXT },
 262
 263       /* GL_EXT_vertex_arrays */
 264       { "glVertexPointerEXT", (gl_function) glVertexPointerEXT },
 265       { "glNormalPointerEXT", (gl_function) glNormalPointerEXT },
 266       { "glColorPointerEXT", (gl_function) glColorPointerEXT },
 267       { "glIndexPointerEXT", (gl_function) glIndexPointerEXT },
 268       { "glTexCoordPointerEXT", (gl_function) glTexCoordPointerEXT },
 269       { "glEdgeFlagPointerEXT", (gl_function) glEdgeFlagPointerEXT },
 270       { "glGetPointervEXT", (gl_function) glGetPointervEXT },
 271       { "glArrayElementEXT", (gl_function) glArrayElementEXT },
 272       { "glDrawArraysEXT", (gl_function) glDrawArraysEXT },
 273
 274       /* GL_EXT_texture_object */
 275       { "glGenTexturesEXT", (gl_function) glGenTexturesEXT },
 276       { "glDeleteTexturesEXT", (gl_function) glDeleteTexturesEXT },
 277       { "glBindTextureEXT", (gl_function) glBindTextureEXT },
 278       { "glPrioritizeTexturesEXT", (gl_function) glPrioritizeTexturesEXT },
 279       { "glAreTexturesResidentEXT", (gl_function) glAreTexturesResidentEXT },
 280       { "glIsTextureEXT", (gl_function) glIsTextureEXT },
 281
 282       /* GL_EXT_texture3D */
 283       { "glTexImage3DEXT", (gl_function) glTexImage3DEXT },
 284       { "glTexSubImage3DEXT", (gl_function) glTexSubImage3DEXT },
 285       { "glCopyTexSubImage3DEXT", (gl_function) glCopyTexSubImage3DEXT },
 286
 287       /* GL_EXT_color_table */
 288       { "glColorTableEXT", (gl_function) glColorTableEXT },
 289       { "glColorSubTableEXT", (gl_function) glColorSubTableEXT },
 290       { "glGetColorTableEXT", (gl_function) glGetColorTableEXT },
 291       { "glGetColorTableParameterfvEXT", (gl_function) glGetColorTableParameterfvEXT },
 292       { "glGetColorTableParameterivEXT", (gl_function) glGetColorTableParameterivEXT },
 293
 294       /* GL_ARB_multitexture */
 295       { "glActiveTextureARB", (gl_function) glActiveTextureARB },
 296       { "glClientActiveTextureARB", (gl_function) glClientActiveTextureARB },
 297       { "glMultiTexCoord1dARB", (gl_function) glMultiTexCoord1dARB },
 298       { "glMultiTexCoord1dvARB", (gl_function) glMultiTexCoord1dvARB },
 299       { "glMultiTexCoord1fARB", (gl_function) glMultiTexCoord1fARB },
 300       { "glMultiTexCoord1fvARB", (gl_function) glMultiTexCoord1fvARB },
 301       { "glMultiTexCoord1iARB", (gl_function) glMultiTexCoord1iARB },
 302       { "glMultiTexCoord1ivARB", (gl_function) glMultiTexCoord1ivARB },
 303       { "glMultiTexCoord1sARB", (gl_function) glMultiTexCoord1sARB },
 304       { "glMultiTexCoord1svARB", (gl_function) glMultiTexCoord1svARB },
 305       { "glMultiTexCoord2dARB", (gl_function) glMultiTexCoord2dARB },
 306       { "glMultiTexCoord2dvARB", (gl_function) glMultiTexCoord2dvARB },
 307       { "glMultiTexCoord2fARB", (gl_function) glMultiTexCoord2fARB },
 308       { "glMultiTexCoord2fvARB", (gl_function) glMultiTexCoord2fvARB },
 309       { "glMultiTexCoord2iARB", (gl_function) glMultiTexCoord2iARB },
 310       { "glMultiTexCoord2ivARB", (gl_function) glMultiTexCoord2ivARB },
 311       { "glMultiTexCoord2sARB", (gl_function) glMultiTexCoord2sARB },
 312       { "glMultiTexCoord2svARB", (gl_function) glMultiTexCoord2svARB },
 313       { "glMultiTexCoord3dARB", (gl_function) glMultiTexCoord3dARB },
 314       { "glMultiTexCoord3dvARB", (gl_function) glMultiTexCoord3dvARB },
 315       { "glMultiTexCoord3fARB", (gl_function) glMultiTexCoord3fARB },
 316       { "glMultiTexCoord3fvARB", (gl_function) glMultiTexCoord3fvARB },
 317       { "glMultiTexCoord3iARB", (gl_function) glMultiTexCoord3iARB },
 318       { "glMultiTexCoord3ivARB", (gl_function) glMultiTexCoord3ivARB },
 319       { "glMultiTexCoord3sARB", (gl_function) glMultiTexCoord3sARB },
 320       { "glMultiTexCoord3svARB", (gl_function) glMultiTexCoord3svARB },
 321       { "glMultiTexCoord4dARB", (gl_function) glMultiTexCoord4dARB },
 322       { "glMultiTexCoord4dvARB", (gl_function) glMultiTexCoord4dvARB },
 323       { "glMultiTexCoord4fARB", (gl_function) glMultiTexCoord4fARB },
 324       { "glMultiTexCoord4fvARB", (gl_function) glMultiTexCoord4fvARB },
 325       { "glMultiTexCoord4iARB", (gl_function) glMultiTexCoord4iARB },
 326       { "glMultiTexCoord4ivARB", (gl_function) glMultiTexCoord4ivARB },
 327       { "glMultiTexCoord4sARB", (gl_function) glMultiTexCoord4sARB },
 328       { "glMultiTexCoord4svARB", (gl_function) glMultiTexCoord4svARB },
 329
 330       /* GL_EXT_point_parameters */
 331       { "glPointParameterfEXT", (gl_function) glPointParameterfEXT },
 332       { "glPointParameterfvEXT", (gl_function) glPointParameterfvEXT },
 333
 334       /* GL_INGR_blend_func_separate */
 335       { "glBlendFuncSeparateINGR", (gl_function) glBlendFuncSeparateINGR },
 336
 337       /* GL_MESA_window_pos */
 338       { "glWindowPos2iMESA", (gl_function) glWindowPos2iMESA },
 339       { "glWindowPos2sMESA", (gl_function) glWindowPos2sMESA },
 340       { "glWindowPos2fMESA", (gl_function) glWindowPos2fMESA },
 341       { "glWindowPos2dMESA", (gl_function) glWindowPos2dMESA },
 342       { "glWindowPos2ivMESA", (gl_function) glWindowPos2ivMESA },
 343       { "glWindowPos2svMESA", (gl_function) glWindowPos2svMESA },
 344       { "glWindowPos2fvMESA", (gl_function) glWindowPos2fvMESA },
 345       { "glWindowPos2dvMESA", (gl_function) glWindowPos2dvMESA },
 346       { "glWindowPos3iMESA", (gl_function) glWindowPos3iMESA },
 347       { "glWindowPos3sMESA", (gl_function) glWindowPos3sMESA },
 348       { "glWindowPos3fMESA", (gl_function) glWindowPos3fMESA },
 349       { "glWindowPos3dMESA", (gl_function) glWindowPos3dMESA },
 350       { "glWindowPos3ivMESA", (gl_function) glWindowPos3ivMESA },
 351       { "glWindowPos3svMESA", (gl_function) glWindowPos3svMESA },
 352       { "glWindowPos3fvMESA", (gl_function) glWindowPos3fvMESA },
 353       { "glWindowPos3dvMESA", (gl_function) glWindowPos3dvMESA },
 354       { "glWindowPos4iMESA", (gl_function) glWindowPos4iMESA },
 355       { "glWindowPos4sMESA", (gl_function) glWindowPos4sMESA },
 356       { "glWindowPos4fMESA", (gl_function) glWindowPos4fMESA },
 357       { "glWindowPos4dMESA", (gl_function) glWindowPos4dMESA },
 358       { "glWindowPos4ivMESA", (gl_function) glWindowPos4ivMESA },
 359       { "glWindowPos4svMESA", (gl_function) glWindowPos4svMESA },
 360       { "glWindowPos4fvMESA", (gl_function) glWindowPos4fvMESA },
 361       { "glWindowPos4dvMESA", (gl_function) glWindowPos4dvMESA },
 362
 363       /* GL_MESA_resize_buffers */
 364       { "glResizeBuffersMESA", (gl_function) glResizeBuffersMESA },
 365
 366       /* GL_EXT_compiled_vertex_array */
 367       { "glLockArraysEXT", (gl_function) glLockArraysEXT },
 368       { "glUnlockArraysEXT", (gl_function) glUnlockArraysEXT },
 369
 370       { NULL, NULL } /* end of list token */
 371    };
 372    GLuint i;
 373
 374    for (i = 0; procTable[i].address; i++) {
 375       if (strcmp((const char *) procName, procTable[i].name) == 0)
 376          return procTable[i].address;
 377    }
 378
 379    return NULL;
 380 }