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816fca9957ea08d49c058526bb97e6e2a037b059
[mesa.git] / src / mesa / main / extensions.c
1 /*
2 * Mesa 3-D graphics library
3 * Version: 6.5
4 *
5 * Copyright (C) 1999-2005 Brian Paul All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25
26 #include "glheader.h"
27 #include "imports.h"
28 #include "context.h"
29 #include "extensions.h"
30 #include "simple_list.h"
31 #include "mtypes.h"
32
33
34 #define F(x) (int)(uintptr_t)&(((struct gl_extensions *)0)->x)
35 #define ON GL_TRUE
36 #define OFF GL_FALSE
37
38
39 /*
40 * Note: The GL_MESAX_* extensions are placeholders for future ARB extensions.
41 */
42 static const struct {
43 GLboolean enabled;
44 const char *name;
45 int flag_offset;
46 } default_extensions[] = {
47 { OFF, "GL_ARB_depth_texture", F(ARB_depth_texture) },
48 { OFF, "GL_ARB_draw_buffers", F(ARB_draw_buffers) },
49 { OFF, "GL_ARB_fragment_program", F(ARB_fragment_program) },
50 { OFF, "GL_ARB_fragment_shader", F(ARB_fragment_shader) },
51 { OFF, "GL_MESAX_half_float_pixel", F(ARB_half_float_pixel) },
52 { OFF, "GL_ARB_imaging", F(ARB_imaging) },
53 { OFF, "GL_ARB_multisample", F(ARB_multisample) },
54 { OFF, "GL_ARB_multitexture", F(ARB_multitexture) },
55 { OFF, "GL_ARB_occlusion_query", F(ARB_occlusion_query) },
56 { OFF, "GL_ARB_pixel_buffer_object", F(EXT_pixel_buffer_object) },
57 { OFF, "GL_ARB_point_parameters", F(EXT_point_parameters) },
58 { OFF, "GL_ARB_point_sprite", F(ARB_point_sprite) },
59 { OFF, "GL_ARB_shader_objects", F(ARB_shader_objects) },
60 { OFF, "GL_ARB_shading_language_100", F(ARB_shading_language_100) },
61 { OFF, "GL_ARB_shadow", F(ARB_shadow) },
62 { OFF, "GL_ARB_shadow_ambient", F(SGIX_shadow_ambient) },
63 { OFF, "GL_ARB_texture_border_clamp", F(ARB_texture_border_clamp) },
64 { OFF, "GL_ARB_texture_compression", F(ARB_texture_compression) },
65 { OFF, "GL_ARB_texture_cube_map", F(ARB_texture_cube_map) },
66 { OFF, "GL_ARB_texture_env_add", F(EXT_texture_env_add) },
67 { OFF, "GL_ARB_texture_env_combine", F(ARB_texture_env_combine) },
68 { OFF, "GL_ARB_texture_env_crossbar", F(ARB_texture_env_crossbar) },
69 { OFF, "GL_ARB_texture_env_dot3", F(ARB_texture_env_dot3) },
70 { OFF, "GL_MESAX_texture_float", F(ARB_texture_float) },
71 { OFF, "GL_ARB_texture_mirrored_repeat", F(ARB_texture_mirrored_repeat)},
72 { OFF, "GL_ARB_texture_non_power_of_two", F(ARB_texture_non_power_of_two)},
73 { OFF, "GL_ARB_texture_rectangle", F(NV_texture_rectangle) },
74 { ON, "GL_ARB_transpose_matrix", F(ARB_transpose_matrix) },
75 { OFF, "GL_ARB_vertex_buffer_object", F(ARB_vertex_buffer_object) },
76 { OFF, "GL_ARB_vertex_program", F(ARB_vertex_program) },
77 { OFF, "GL_ARB_vertex_shader", F(ARB_vertex_shader) },
78 { ON, "GL_ARB_window_pos", F(ARB_window_pos) },
79 { ON, "GL_EXT_abgr", F(EXT_abgr) },
80 { ON, "GL_EXT_bgra", F(EXT_bgra) },
81 { OFF, "GL_EXT_blend_color", F(EXT_blend_color) },
82 { OFF, "GL_EXT_blend_equation_separate", F(EXT_blend_equation_separate) },
83 { OFF, "GL_EXT_blend_func_separate", F(EXT_blend_func_separate) },
84 { OFF, "GL_EXT_blend_logic_op", F(EXT_blend_logic_op) },
85 { OFF, "GL_EXT_blend_minmax", F(EXT_blend_minmax) },
86 { OFF, "GL_EXT_blend_subtract", F(EXT_blend_subtract) },
87 { ON, "GL_EXT_clip_volume_hint", F(EXT_clip_volume_hint) },
88 { OFF, "GL_EXT_cull_vertex", F(EXT_cull_vertex) },
89 { ON, "GL_EXT_compiled_vertex_array", F(EXT_compiled_vertex_array) },
90 { OFF, "GL_EXT_convolution", F(EXT_convolution) },
91 { ON, "GL_EXT_copy_texture", F(EXT_copy_texture) },
92 { OFF, "GL_EXT_depth_bounds_test", F(EXT_depth_bounds_test) },
93 { ON, "GL_EXT_draw_range_elements", F(EXT_draw_range_elements) },
94 { OFF, "GL_EXT_framebuffer_object", F(EXT_framebuffer_object) },
95 { OFF, "GL_EXT_framebuffer_blit", F(EXT_framebuffer_blit) },
96 { OFF, "GL_EXT_fog_coord", F(EXT_fog_coord) },
97 { OFF, "GL_EXT_histogram", F(EXT_histogram) },
98 { OFF, "GL_EXT_multi_draw_arrays", F(EXT_multi_draw_arrays) },
99 { ON, "GL_EXT_packed_depth_stencil", F(EXT_packed_depth_stencil) },
100 { ON, "GL_EXT_packed_pixels", F(EXT_packed_pixels) },
101 { OFF, "GL_EXT_paletted_texture", F(EXT_paletted_texture) },
102 { OFF, "GL_EXT_pixel_buffer_object", F(EXT_pixel_buffer_object) },
103 { OFF, "GL_EXT_point_parameters", F(EXT_point_parameters) },
104 { ON, "GL_EXT_polygon_offset", F(EXT_polygon_offset) },
105 { ON, "GL_EXT_rescale_normal", F(EXT_rescale_normal) },
106 { OFF, "GL_EXT_secondary_color", F(EXT_secondary_color) },
107 { ON, "GL_EXT_separate_specular_color", F(EXT_separate_specular_color) },
108 { OFF, "GL_EXT_shadow_funcs", F(EXT_shadow_funcs) },
109 { OFF, "GL_EXT_shared_texture_palette", F(EXT_shared_texture_palette) },
110 { OFF, "GL_EXT_stencil_two_side", F(EXT_stencil_two_side) },
111 { OFF, "GL_EXT_stencil_wrap", F(EXT_stencil_wrap) },
112 { ON, "GL_EXT_subtexture", F(EXT_subtexture) },
113 { ON, "GL_EXT_texture", F(EXT_texture) },
114 { ON, "GL_EXT_texture3D", F(EXT_texture3D) },
115 { OFF, "GL_EXT_texture_compression_s3tc", F(EXT_texture_compression_s3tc) },
116 { ON, "GL_EXT_texture_edge_clamp", F(SGIS_texture_edge_clamp) },
117 { OFF, "GL_EXT_texture_env_add", F(EXT_texture_env_add) },
118 { OFF, "GL_EXT_texture_env_combine", F(EXT_texture_env_combine) },
119 { OFF, "GL_EXT_texture_env_dot3", F(EXT_texture_env_dot3) },
120 { OFF, "GL_EXT_texture_filter_anisotropic", F(EXT_texture_filter_anisotropic) },
121 { OFF, "GL_EXT_texture_lod_bias", F(EXT_texture_lod_bias) },
122 { OFF, "GL_EXT_texture_mirror_clamp", F(EXT_texture_mirror_clamp) },
123 { ON, "GL_EXT_texture_object", F(EXT_texture_object) },
124 { OFF, "GL_EXT_texture_rectangle", F(NV_texture_rectangle) },
125 { OFF, "GL_EXT_timer_query", F(EXT_timer_query) },
126 { ON, "GL_EXT_vertex_array", F(EXT_vertex_array) },
127 { OFF, "GL_EXT_vertex_array_set", F(EXT_vertex_array_set) },
128 { OFF, "GL_3DFX_texture_compression_FXT1", F(TDFX_texture_compression_FXT1) },
129 { OFF, "GL_APPLE_client_storage", F(APPLE_client_storage) },
130 { ON, "GL_APPLE_packed_pixels", F(APPLE_packed_pixels) },
131 { OFF, "GL_ATI_blend_equation_separate", F(EXT_blend_equation_separate) },
132 { OFF, "GL_ATI_texture_env_combine3", F(ATI_texture_env_combine3)},
133 { OFF, "GL_ATI_texture_mirror_once", F(ATI_texture_mirror_once)},
134 { OFF, "GL_ATI_fragment_shader", F(ATI_fragment_shader)},
135 { OFF, "GL_IBM_multimode_draw_arrays", F(IBM_multimode_draw_arrays) },
136 { ON, "GL_IBM_rasterpos_clip", F(IBM_rasterpos_clip) },
137 { OFF, "GL_IBM_texture_mirrored_repeat", F(ARB_texture_mirrored_repeat)},
138 { OFF, "GL_INGR_blend_func_separate", F(EXT_blend_func_separate) },
139 { OFF, "GL_MESA_pack_invert", F(MESA_pack_invert) },
140 { OFF, "GL_MESA_packed_depth_stencil", F(MESA_packed_depth_stencil) },
141 { OFF, "GL_MESA_program_debug", F(MESA_program_debug) },
142 { OFF, "GL_MESA_resize_buffers", F(MESA_resize_buffers) },
143 { OFF, "GL_MESA_ycbcr_texture", F(MESA_ycbcr_texture) },
144 { ON, "GL_MESA_window_pos", F(ARB_window_pos) },
145 { OFF, "GL_NV_blend_square", F(NV_blend_square) },
146 { OFF, "GL_NV_fragment_program", F(NV_fragment_program) },
147 { ON, "GL_NV_light_max_exponent", F(NV_light_max_exponent) },
148 { OFF, "GL_NV_point_sprite", F(NV_point_sprite) },
149 { OFF, "GL_NV_texture_rectangle", F(NV_texture_rectangle) },
150 { ON, "GL_NV_texgen_reflection", F(NV_texgen_reflection) },
151 { OFF, "GL_NV_vertex_program", F(NV_vertex_program) },
152 { OFF, "GL_NV_vertex_program1_1", F(NV_vertex_program1_1) },
153 { ON, "GL_OES_read_format", F(OES_read_format) },
154 { OFF, "GL_SGI_color_matrix", F(SGI_color_matrix) },
155 { OFF, "GL_SGI_color_table", F(SGI_color_table) },
156 { OFF, "GL_SGI_texture_color_table", F(SGI_texture_color_table) },
157 { OFF, "GL_SGIS_generate_mipmap", F(SGIS_generate_mipmap) },
158 { OFF, "GL_SGIS_pixel_texture", F(SGIS_pixel_texture) },
159 { OFF, "GL_SGIS_texture_border_clamp", F(ARB_texture_border_clamp) },
160 { ON, "GL_SGIS_texture_edge_clamp", F(SGIS_texture_edge_clamp) },
161 { ON, "GL_SGIS_texture_lod", F(SGIS_texture_lod) },
162 { OFF, "GL_SGIX_depth_texture", F(SGIX_depth_texture) },
163 { OFF, "GL_SGIX_pixel_texture", F(SGIX_pixel_texture) },
164 { OFF, "GL_SGIX_shadow", F(SGIX_shadow) },
165 { OFF, "GL_SGIX_shadow_ambient", F(SGIX_shadow_ambient) },
166 { OFF, "GL_SUN_multi_draw_arrays", F(EXT_multi_draw_arrays) },
167 { OFF, "GL_S3_s3tc", F(S3_s3tc) },
168 };
169
170
171
172 /**
173 * Enable all extensions suitable for a software-only renderer.
174 * This is a convenience function used by the XMesa, OSMesa, GGI drivers, etc.
175 */
176 void
177 _mesa_enable_sw_extensions(GLcontext *ctx)
178 {
179 ctx->Extensions.ARB_depth_texture = GL_TRUE;
180 ctx->Extensions.ARB_draw_buffers = GL_TRUE;
181 #if FEATURE_ARB_fragment_program
182 ctx->Extensions.ARB_fragment_program = GL_TRUE;
183 #endif
184 #if 0 && FEATURE_ARB_fragment_shader
185 ctx->Extensions.ARB_fragment_shader = GL_TRUE;
186 #endif
187 /*ctx->Extensions.ARB_half_float_pixel = GL_TRUE;*/
188 ctx->Extensions.ARB_imaging = GL_TRUE;
189 ctx->Extensions.ARB_multitexture = GL_TRUE;
190 #if FEATURE_ARB_occlusion_query
191 ctx->Extensions.ARB_occlusion_query = GL_TRUE;
192 #endif
193 ctx->Extensions.ARB_point_sprite = GL_TRUE;
194 #if 0 && FEATURE_ARB_shader_objects
195 ctx->Extensions.ARB_shader_objects = GL_TRUE;
196 #endif
197 #if 0 && FEATURE_ARB_shading_language_100
198 ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
199 #endif
200 ctx->Extensions.ARB_shadow = GL_TRUE;
201 ctx->Extensions.ARB_texture_border_clamp = GL_TRUE;
202 ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
203 ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
204 ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
205 ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
206 /*ctx->Extensions.ARB_texture_float = GL_TRUE;*/
207 ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE;
208 ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
209 #if FEATURE_ARB_vertex_program
210 ctx->Extensions.ARB_vertex_program = GL_TRUE;
211 #endif
212 #if 0 && FEATURE_ARB_vertex_shader
213 ctx->Extensions.ARB_vertex_shader = GL_TRUE;
214 #endif
215 #if FEATURE_ARB_vertex_buffer_object
216 ctx->Extensions.ARB_vertex_buffer_object = GL_TRUE;
217 #endif
218 #if FEATURE_ATI_fragment_shader
219 ctx->Extensions.ATI_fragment_shader = GL_TRUE;
220 #endif
221 ctx->Extensions.ATI_texture_env_combine3 = GL_TRUE;
222 ctx->Extensions.ATI_texture_mirror_once = GL_TRUE;
223 ctx->Extensions.EXT_blend_color = GL_TRUE;
224 ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
225 ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
226 ctx->Extensions.EXT_blend_logic_op = GL_TRUE;
227 ctx->Extensions.EXT_blend_minmax = GL_TRUE;
228 ctx->Extensions.EXT_blend_subtract = GL_TRUE;
229 ctx->Extensions.EXT_convolution = GL_TRUE;
230 ctx->Extensions.EXT_depth_bounds_test = GL_TRUE;
231 ctx->Extensions.EXT_fog_coord = GL_TRUE;
232 #if FEATURE_EXT_framebuffer_object
233 ctx->Extensions.EXT_framebuffer_object = GL_TRUE;
234 ctx->Extensions.EXT_framebuffer_blit = GL_TRUE;
235 #endif
236 ctx->Extensions.EXT_histogram = GL_TRUE;
237 ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;
238 ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE;
239 ctx->Extensions.EXT_paletted_texture = GL_TRUE;
240 #if FEATURE_EXT_pixel_buffer_object
241 ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
242 #endif
243 ctx->Extensions.EXT_point_parameters = GL_TRUE;
244 ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
245 ctx->Extensions.EXT_secondary_color = GL_TRUE;
246 ctx->Extensions.EXT_shared_texture_palette = GL_TRUE;
247 ctx->Extensions.EXT_stencil_wrap = GL_TRUE;
248 ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
249 ctx->Extensions.EXT_texture_env_add = GL_TRUE;
250 ctx->Extensions.EXT_texture_env_combine = GL_TRUE;
251 ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
252 ctx->Extensions.EXT_texture_mirror_clamp = GL_TRUE;
253 ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;
254 ctx->Extensions.IBM_multimode_draw_arrays = GL_TRUE;
255 ctx->Extensions.MESA_pack_invert = GL_TRUE;
256 #if FEATURE_MESA_program_debug
257 ctx->Extensions.MESA_program_debug = GL_TRUE;
258 #endif
259 ctx->Extensions.MESA_resize_buffers = GL_TRUE;
260 ctx->Extensions.MESA_ycbcr_texture = GL_TRUE;
261 ctx->Extensions.NV_blend_square = GL_TRUE;
262 /*ctx->Extensions.NV_light_max_exponent = GL_TRUE;*/
263 ctx->Extensions.NV_point_sprite = GL_TRUE;
264 ctx->Extensions.NV_texture_rectangle = GL_TRUE;
265 /*ctx->Extensions.NV_texgen_reflection = GL_TRUE;*/
266 #if FEATURE_NV_vertex_program
267 ctx->Extensions.NV_vertex_program = GL_TRUE;
268 ctx->Extensions.NV_vertex_program1_1 = GL_TRUE;
269 #endif
270 #if FEATURE_NV_fragment_program
271 ctx->Extensions.NV_fragment_program = GL_TRUE;
272 #endif
273 ctx->Extensions.SGI_color_matrix = GL_TRUE;
274 ctx->Extensions.SGI_color_table = GL_TRUE;
275 ctx->Extensions.SGI_texture_color_table = GL_TRUE;
276 ctx->Extensions.SGIS_generate_mipmap = GL_TRUE;
277 ctx->Extensions.SGIS_pixel_texture = GL_TRUE;
278 ctx->Extensions.SGIS_texture_edge_clamp = GL_TRUE;
279 ctx->Extensions.SGIX_depth_texture = GL_TRUE;
280 ctx->Extensions.SGIX_pixel_texture = GL_TRUE;
281 ctx->Extensions.SGIX_shadow = GL_TRUE;
282 ctx->Extensions.SGIX_shadow_ambient = GL_TRUE;
283 }
284
285
286 /**
287 * Enable GL_ARB_imaging and all the EXT extensions that are subsets of it.
288 */
289 void
290 _mesa_enable_imaging_extensions(GLcontext *ctx)
291 {
292 ctx->Extensions.ARB_imaging = GL_TRUE;
293 ctx->Extensions.EXT_blend_color = GL_TRUE;
294 ctx->Extensions.EXT_blend_minmax = GL_TRUE;
295 ctx->Extensions.EXT_blend_subtract = GL_TRUE;
296 ctx->Extensions.EXT_convolution = GL_TRUE;
297 ctx->Extensions.EXT_histogram = GL_TRUE;
298 ctx->Extensions.SGI_color_matrix = GL_TRUE;
299 ctx->Extensions.SGI_color_table = GL_TRUE;
300 }
301
302
303
304 /**
305 * Enable all OpenGL 1.3 features and extensions.
306 * A convenience function to be called by drivers.
307 */
308 void
309 _mesa_enable_1_3_extensions(GLcontext *ctx)
310 {
311 ctx->Extensions.ARB_multisample = GL_TRUE;
312 ctx->Extensions.ARB_multitexture = GL_TRUE;
313 ctx->Extensions.ARB_texture_border_clamp = GL_TRUE;
314 ctx->Extensions.ARB_texture_compression = GL_TRUE;
315 ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
316 ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
317 ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
318 ctx->Extensions.EXT_texture_env_add = GL_TRUE;
319 /*ctx->Extensions.ARB_transpose_matrix = GL_TRUE;*/
320 }
321
322
323
324 /**
325 * Enable all OpenGL 1.4 features and extensions.
326 * A convenience function to be called by drivers.
327 */
328 void
329 _mesa_enable_1_4_extensions(GLcontext *ctx)
330 {
331 ctx->Extensions.ARB_depth_texture = GL_TRUE;
332 ctx->Extensions.ARB_shadow = GL_TRUE;
333 ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
334 ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE;
335 ctx->Extensions.ARB_window_pos = GL_TRUE;
336 ctx->Extensions.EXT_blend_color = GL_TRUE;
337 ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
338 ctx->Extensions.EXT_blend_logic_op = GL_TRUE;
339 ctx->Extensions.EXT_blend_minmax = GL_TRUE;
340 ctx->Extensions.EXT_blend_subtract = GL_TRUE;
341 ctx->Extensions.EXT_fog_coord = GL_TRUE;
342 ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;
343 ctx->Extensions.EXT_point_parameters = GL_TRUE;
344 ctx->Extensions.EXT_secondary_color = GL_TRUE;
345 ctx->Extensions.EXT_stencil_wrap = GL_TRUE;
346 ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;
347 ctx->Extensions.SGIS_generate_mipmap = GL_TRUE;
348 }
349
350
351 /**
352 * Enable all OpenGL 1.5 features and extensions.
353 * A convenience function to be called by drivers.
354 */
355 void
356 _mesa_enable_1_5_extensions(GLcontext *ctx)
357 {
358 ctx->Extensions.ARB_occlusion_query = GL_TRUE;
359 ctx->Extensions.ARB_vertex_buffer_object = GL_TRUE;
360 ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
361 }
362
363
364 /**
365 * Enable all OpenGL 2.0 features and extensions.
366 * A convenience function to be called by drivers.
367 */
368 void
369 _mesa_enable_2_0_extensions(GLcontext *ctx)
370 {
371 ctx->Extensions.ARB_draw_buffers = GL_TRUE;
372 #if 0 && FEATURE_ARB_fragment_shader
373 ctx->Extensions.ARB_fragment_shader = GL_TRUE;
374 #endif
375 ctx->Extensions.ARB_point_sprite = GL_TRUE;
376 ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
377 #if 0 && FEATURE_ARB_shader_objects
378 ctx->Extensions.ARB_shader_objects = GL_TRUE;
379 #endif
380 #if 0 && FEATURE_ARB_shading_language_100
381 ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
382 #endif
383 ctx->Extensions.EXT_stencil_two_side = GL_FALSE; /* yes, turn it off */
384 #if 0 && FEATURE_ARB_vertex_shader
385 ctx->Extensions.ARB_vertex_shader = GL_TRUE;
386 #endif
387 }
388
389
390
391 /**
392 * Either enable or disable the named extension.
393 */
394 static void
395 set_extension( GLcontext *ctx, const char *name, GLboolean state )
396 {
397 GLboolean *base = (GLboolean *) &ctx->Extensions;
398 GLuint i;
399
400 if (ctx->Extensions.String) {
401 /* The string was already queried - can't change it now! */
402 _mesa_problem(ctx, "Trying to enable/disable extension after glGetString(GL_EXTENSIONS): %s", name);
403 return;
404 }
405
406 for (i = 0 ; i < Elements(default_extensions) ; i++) {
407 if (_mesa_strcmp(default_extensions[i].name, name) == 0) {
408 if (default_extensions[i].flag_offset) {
409 GLboolean *enabled = base + default_extensions[i].flag_offset;
410 *enabled = state;
411 }
412 return;
413 }
414 }
415 _mesa_problem(ctx, "Trying to enable unknown extension: %s", name);
416 }
417
418
419 /**
420 * Enable the named extension.
421 * Typically called by drivers.
422 */
423 void
424 _mesa_enable_extension( GLcontext *ctx, const char *name )
425 {
426 set_extension(ctx, name, GL_TRUE);
427 }
428
429
430 /**
431 * Disable the named extension.
432 * XXX is this really needed???
433 */
434 void
435 _mesa_disable_extension( GLcontext *ctx, const char *name )
436 {
437 set_extension(ctx, name, GL_FALSE);
438 }
439
440
441 /**
442 * Test if the named extension is enabled in this context.
443 */
444 GLboolean
445 _mesa_extension_is_enabled( GLcontext *ctx, const char *name )
446 {
447 const GLboolean *base = (const GLboolean *) &ctx->Extensions;
448 GLuint i;
449
450 for (i = 0 ; i < Elements(default_extensions) ; i++) {
451 if (_mesa_strcmp(default_extensions[i].name, name) == 0) {
452 if (!default_extensions[i].flag_offset)
453 return GL_TRUE;
454 return *(base + default_extensions[i].flag_offset);
455 }
456 }
457 return GL_FALSE;
458 }
459
460
461 /**
462 * Run through the default_extensions array above and set the
463 * ctx->Extensions.ARB/EXT_* flags accordingly.
464 * To be called during context initialization.
465 */
466 void
467 _mesa_init_extensions( GLcontext *ctx )
468 {
469 GLboolean *base = (GLboolean *) &ctx->Extensions;
470 GLuint i;
471
472 for (i = 0 ; i < Elements(default_extensions) ; i++) {
473 if (default_extensions[i].enabled &&
474 default_extensions[i].flag_offset) {
475 *(base + default_extensions[i].flag_offset) = GL_TRUE;
476 }
477 }
478 }
479
480
481 /**
482 * Construct the GL_EXTENSIONS string. Called the first time that
483 * glGetString(GL_EXTENSIONS) is called.
484 */
485 GLubyte *
486 _mesa_make_extension_string( GLcontext *ctx )
487 {
488 const GLboolean *base = (const GLboolean *) &ctx->Extensions;
489 GLuint extStrLen = 0;
490 GLubyte *s;
491 GLuint i;
492
493 /* first, compute length of the extension string */
494 for (i = 0 ; i < Elements(default_extensions) ; i++) {
495 if (!default_extensions[i].flag_offset ||
496 *(base + default_extensions[i].flag_offset)) {
497 extStrLen += (GLuint)_mesa_strlen(default_extensions[i].name) + 1;
498 }
499 }
500 s = (GLubyte *) _mesa_malloc(extStrLen);
501
502 /* second, build the extension string */
503 extStrLen = 0;
504 for (i = 0 ; i < Elements(default_extensions) ; i++) {
505 if (!default_extensions[i].flag_offset ||
506 *(base + default_extensions[i].flag_offset)) {
507 GLuint len = (GLuint)_mesa_strlen(default_extensions[i].name);
508 _mesa_memcpy(s + extStrLen, default_extensions[i].name, len);
509 extStrLen += len;
510 s[extStrLen] = (GLubyte) ' ';
511 extStrLen++;
512 }
513 }
514 ASSERT(extStrLen > 0);
515
516 s[extStrLen - 1] = 0;
517
518 return s;
519 }