projects / mesa.git / blob
? search:


88c025ee326c45d8de7d09090994d339e86b06a6
[mesa.git] / src / mesa / main / extensions.c
1 /*
2 * Mesa 3-D graphics library
3 * Version: 7.6
4 *
5 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
6 * Copyright (C) 2009 VMware, Inc. All Rights Reserved.
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
22 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
23 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 */
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 F(x) offsetof(struct gl_extensions, x)
36 #define ON GL_TRUE
37 #define OFF GL_FALSE
38
39
40 /*
41 * Note: The GL_MESAX_* extensions are placeholders for future ARB extensions.
42 */
43 static const struct {
44 GLboolean enabled;
45 const char *name;
46 int flag_offset;
47 } default_extensions[] = {
48 { OFF, "GL_ARB_copy_buffer", F(ARB_copy_buffer) },
49 { OFF, "GL_ARB_depth_texture", F(ARB_depth_texture) },
50 { OFF, "GL_ARB_depth_clamp", F(ARB_depth_clamp) },
51 { ON, "GL_ARB_draw_buffers", F(ARB_draw_buffers) },
52 { OFF, "GL_ARB_draw_elements_base_vertex", F(ARB_draw_elements_base_vertex) },
53 { OFF, "GL_ARB_fragment_program", F(ARB_fragment_program) },
54 { OFF, "GL_ARB_fragment_program_shadow", F(ARB_fragment_program_shadow) },
55 { OFF, "GL_ARB_fragment_shader", F(ARB_fragment_shader) },
56 { OFF, "GL_ARB_framebuffer_object", F(ARB_framebuffer_object) },
57 { OFF, "GL_ARB_half_float_pixel", F(ARB_half_float_pixel) },
58 { OFF, "GL_ARB_imaging", F(ARB_imaging) },
59 { OFF, "GL_ARB_map_buffer_range", F(ARB_map_buffer_range) },
60 { ON, "GL_ARB_multisample", F(ARB_multisample) },
61 { OFF, "GL_ARB_multitexture", F(ARB_multitexture) },
62 { OFF, "GL_ARB_occlusion_query", F(ARB_occlusion_query) },
63 { OFF, "GL_ARB_pixel_buffer_object", F(EXT_pixel_buffer_object) },
64 { OFF, "GL_ARB_point_parameters", F(EXT_point_parameters) },
65 { OFF, "GL_ARB_point_sprite", F(ARB_point_sprite) },
66 { OFF, "GL_ARB_provoking_vertex", F(EXT_provoking_vertex) },
67 { OFF, "GL_ARB_seamless_cube_map", F(ARB_seamless_cube_map) },
68 { OFF, "GL_ARB_shader_objects", F(ARB_shader_objects) },
69 { OFF, "GL_ARB_shading_language_100", F(ARB_shading_language_100) },
70 { OFF, "GL_ARB_shading_language_120", F(ARB_shading_language_120) },
71 { OFF, "GL_ARB_shadow", F(ARB_shadow) },
72 { OFF, "GL_ARB_shadow_ambient", F(ARB_shadow_ambient) },
73 { OFF, "GL_ARB_sync", F(ARB_sync) },
74 { OFF, "GL_ARB_texture_border_clamp", F(ARB_texture_border_clamp) },
75 { ON, "GL_ARB_texture_compression", F(ARB_texture_compression) },
76 { OFF, "GL_ARB_texture_cube_map", F(ARB_texture_cube_map) },
77 { OFF, "GL_ARB_texture_env_add", F(EXT_texture_env_add) },
78 { OFF, "GL_ARB_texture_env_combine", F(ARB_texture_env_combine) },
79 { OFF, "GL_ARB_texture_env_crossbar", F(ARB_texture_env_crossbar) },
80 { OFF, "GL_ARB_texture_env_dot3", F(ARB_texture_env_dot3) },
81 { OFF, "GL_MESAX_texture_float", F(ARB_texture_float) },
82 { OFF, "GL_ARB_texture_mirrored_repeat", F(ARB_texture_mirrored_repeat)},
83 { OFF, "GL_ARB_texture_non_power_of_two", F(ARB_texture_non_power_of_two)},
84 { OFF, "GL_ARB_texture_rectangle", F(NV_texture_rectangle) },
85 { ON, "GL_ARB_transpose_matrix", F(ARB_transpose_matrix) },
86 { OFF, "GL_ARB_vertex_array_bgra", F(EXT_vertex_array_bgra) },
87 { OFF, "GL_ARB_vertex_array_object", F(ARB_vertex_array_object) },
88 { ON, "GL_ARB_vertex_buffer_object", F(ARB_vertex_buffer_object) },
89 { OFF, "GL_ARB_vertex_program", F(ARB_vertex_program) },
90 { OFF, "GL_ARB_vertex_shader", F(ARB_vertex_shader) },
91 { ON, "GL_ARB_window_pos", F(ARB_window_pos) },
92 { ON, "GL_EXT_abgr", F(EXT_abgr) },
93 { ON, "GL_EXT_bgra", F(EXT_bgra) },
94 { OFF, "GL_EXT_blend_color", F(EXT_blend_color) },
95 { OFF, "GL_EXT_blend_equation_separate", F(EXT_blend_equation_separate) },
96 { OFF, "GL_EXT_blend_func_separate", F(EXT_blend_func_separate) },
97 { OFF, "GL_EXT_blend_logic_op", F(EXT_blend_logic_op) },
98 { OFF, "GL_EXT_blend_minmax", F(EXT_blend_minmax) },
99 { OFF, "GL_EXT_blend_subtract", F(EXT_blend_subtract) },
100 { OFF, "GL_EXT_clip_volume_hint", F(EXT_clip_volume_hint) },
101 { OFF, "GL_EXT_cull_vertex", F(EXT_cull_vertex) },
102 { ON, "GL_EXT_compiled_vertex_array", F(EXT_compiled_vertex_array) },
103 { OFF, "GL_EXT_convolution", F(EXT_convolution) },
104 { ON, "GL_EXT_copy_texture", F(EXT_copy_texture) },
105 { OFF, "GL_EXT_depth_bounds_test", F(EXT_depth_bounds_test) },
106 { OFF, "GL_EXT_draw_buffers2", F(EXT_draw_buffers2) },
107 { ON, "GL_EXT_draw_range_elements", F(EXT_draw_range_elements) },
108 { OFF, "GL_EXT_framebuffer_blit", F(EXT_framebuffer_blit) },
109 { OFF, "GL_EXT_framebuffer_multisample", F(EXT_framebuffer_multisample) },
110 { OFF, "GL_EXT_framebuffer_object", F(EXT_framebuffer_object) },
111 { OFF, "GL_EXT_fog_coord", F(EXT_fog_coord) },
112 { OFF, "GL_EXT_gpu_program_parameters", F(EXT_gpu_program_parameters) },
113 { OFF, "GL_EXT_histogram", F(EXT_histogram) },
114 { ON, "GL_EXT_multi_draw_arrays", F(EXT_multi_draw_arrays) },
115 { OFF, "GL_EXT_packed_depth_stencil", F(EXT_packed_depth_stencil) },
116 { ON, "GL_EXT_packed_pixels", F(EXT_packed_pixels) },
117 { OFF, "GL_EXT_paletted_texture", F(EXT_paletted_texture) },
118 { OFF, "GL_EXT_pixel_buffer_object", F(EXT_pixel_buffer_object) },
119 { OFF, "GL_EXT_point_parameters", F(EXT_point_parameters) },
120 { ON, "GL_EXT_polygon_offset", F(EXT_polygon_offset) },
121 { OFF, "GL_EXT_provoking_vertex", F(EXT_provoking_vertex) },
122 { ON, "GL_EXT_rescale_normal", F(EXT_rescale_normal) },
123 { OFF, "GL_EXT_secondary_color", F(EXT_secondary_color) },
124 { ON, "GL_EXT_separate_specular_color", F(EXT_separate_specular_color) },
125 { OFF, "GL_EXT_shadow_funcs", F(EXT_shadow_funcs) },
126 { OFF, "GL_EXT_shared_texture_palette", F(EXT_shared_texture_palette) },
127 { OFF, "GL_EXT_stencil_two_side", F(EXT_stencil_two_side) },
128 { OFF, "GL_EXT_stencil_wrap", F(EXT_stencil_wrap) },
129 { ON, "GL_EXT_subtexture", F(EXT_subtexture) },
130 { ON, "GL_EXT_texture", F(EXT_texture) },
131 { ON, "GL_EXT_texture3D", F(EXT_texture3D) },
132 { OFF, "GL_EXT_texture_compression_s3tc", F(EXT_texture_compression_s3tc) },
133 { ON, "GL_EXT_texture_edge_clamp", F(SGIS_texture_edge_clamp) },
134 { OFF, "GL_EXT_texture_env_add", F(EXT_texture_env_add) },
135 { OFF, "GL_EXT_texture_env_combine", F(EXT_texture_env_combine) },
136 { OFF, "GL_EXT_texture_env_dot3", F(EXT_texture_env_dot3) },
137 { OFF, "GL_EXT_texture_filter_anisotropic", F(EXT_texture_filter_anisotropic) },
138 { OFF, "GL_EXT_texture_lod_bias", F(EXT_texture_lod_bias) },
139 { OFF, "GL_EXT_texture_mirror_clamp", F(EXT_texture_mirror_clamp) },
140 { ON, "GL_EXT_texture_object", F(EXT_texture_object) },
141 { OFF, "GL_EXT_texture_rectangle", F(NV_texture_rectangle) },
142 { OFF, "GL_EXT_texture_sRGB", F(EXT_texture_sRGB) },
143 { OFF, "GL_EXT_texture_swizzle", F(EXT_texture_swizzle) },
144 { OFF, "GL_EXT_timer_query", F(EXT_timer_query) },
145 { ON, "GL_EXT_vertex_array", F(EXT_vertex_array) },
146 { OFF, "GL_EXT_vertex_array_bgra", F(EXT_vertex_array_bgra) },
147 { OFF, "GL_EXT_vertex_array_set", F(EXT_vertex_array_set) },
148 { OFF, "GL_3DFX_texture_compression_FXT1", F(TDFX_texture_compression_FXT1) },
149 { OFF, "GL_APPLE_client_storage", F(APPLE_client_storage) },
150 { ON, "GL_APPLE_packed_pixels", F(APPLE_packed_pixels) },
151 { OFF, "GL_APPLE_vertex_array_object", F(APPLE_vertex_array_object) },
152 { OFF, "GL_ATI_blend_equation_separate", F(EXT_blend_equation_separate) },
153 { OFF, "GL_ATI_envmap_bumpmap", F(ATI_envmap_bumpmap) },
154 { OFF, "GL_ATI_texture_env_combine3", F(ATI_texture_env_combine3)},
155 { OFF, "GL_ATI_texture_mirror_once", F(ATI_texture_mirror_once)},
156 { OFF, "GL_ATI_fragment_shader", F(ATI_fragment_shader)},
157 { OFF, "GL_ATI_separate_stencil", F(ATI_separate_stencil)},
158 { ON, "GL_IBM_multimode_draw_arrays", F(IBM_multimode_draw_arrays) },
159 { ON, "GL_IBM_rasterpos_clip", F(IBM_rasterpos_clip) },
160 { OFF, "GL_IBM_texture_mirrored_repeat", F(ARB_texture_mirrored_repeat)},
161 { OFF, "GL_INGR_blend_func_separate", F(EXT_blend_func_separate) },
162 { OFF, "GL_MESA_pack_invert", F(MESA_pack_invert) },
163 { OFF, "GL_MESA_packed_depth_stencil", F(MESA_packed_depth_stencil) },
164 { OFF, "GL_MESA_resize_buffers", F(MESA_resize_buffers) },
165 { OFF, "GL_MESA_texture_array", F(MESA_texture_array) },
166 { OFF, "GL_MESA_texture_signed_rgba", F(MESA_texture_signed_rgba) },
167 { OFF, "GL_MESA_ycbcr_texture", F(MESA_ycbcr_texture) },
168 { ON, "GL_MESA_window_pos", F(ARB_window_pos) },
169 { OFF, "GL_NV_blend_square", F(NV_blend_square) },
170 { OFF, "GL_NV_depth_clamp", F(ARB_depth_clamp) },
171 { OFF, "GL_NV_fragment_program", F(NV_fragment_program) },
172 { OFF, "GL_NV_fragment_program_option", F(NV_fragment_program_option) },
173 { ON, "GL_NV_light_max_exponent", F(NV_light_max_exponent) },
174 { OFF, "GL_NV_packed_depth_stencil", F(EXT_packed_depth_stencil) },
175 { OFF, "GL_NV_point_sprite", F(NV_point_sprite) },
176 { OFF, "GL_NV_texture_env_combine4", F(NV_texture_env_combine4) },
177 { OFF, "GL_NV_texture_rectangle", F(NV_texture_rectangle) },
178 { ON, "GL_NV_texgen_reflection", F(NV_texgen_reflection) },
179 { OFF, "GL_NV_vertex_program", F(NV_vertex_program) },
180 { OFF, "GL_NV_vertex_program1_1", F(NV_vertex_program1_1) },
181 { ON, "GL_OES_read_format", F(OES_read_format) },
182 { OFF, "GL_SGI_color_matrix", F(SGI_color_matrix) },
183 { OFF, "GL_SGI_color_table", F(SGI_color_table) },
184 { OFF, "GL_SGI_texture_color_table", F(SGI_texture_color_table) },
185 { OFF, "GL_SGIS_generate_mipmap", F(SGIS_generate_mipmap) },
186 { OFF, "GL_SGIS_texture_border_clamp", F(ARB_texture_border_clamp) },
187 { ON, "GL_SGIS_texture_edge_clamp", F(SGIS_texture_edge_clamp) },
188 { ON, "GL_SGIS_texture_lod", F(SGIS_texture_lod) },
189 { ON, "GL_SUN_multi_draw_arrays", F(EXT_multi_draw_arrays) },
190 { OFF, "GL_S3_s3tc", F(S3_s3tc) },
191 };
192
193
194
195 /**
196 * Enable all extensions suitable for a software-only renderer.
197 * This is a convenience function used by the XMesa, OSMesa, GGI drivers, etc.
198 */
199 void
200 _mesa_enable_sw_extensions(GLcontext *ctx)
201 {
202 ctx->Extensions.ARB_copy_buffer = GL_TRUE;
203 ctx->Extensions.ARB_depth_clamp = GL_TRUE;
204 ctx->Extensions.ARB_depth_texture = GL_TRUE;
205 /*ctx->Extensions.ARB_draw_buffers = GL_TRUE;*/
206 ctx->Extensions.ARB_draw_elements_base_vertex = GL_TRUE;
207 #if FEATURE_ARB_fragment_program
208 ctx->Extensions.ARB_fragment_program = GL_TRUE;
209 ctx->Extensions.ARB_fragment_program_shadow = GL_TRUE;
210 #endif
211 #if FEATURE_ARB_fragment_shader
212 ctx->Extensions.ARB_fragment_shader = GL_TRUE;
213 #endif
214 #if FEATURE_ARB_framebuffer_object
215 ctx->Extensions.ARB_framebuffer_object = GL_TRUE;
216 #endif
217 ctx->Extensions.ARB_half_float_pixel = GL_TRUE;
218 ctx->Extensions.ARB_imaging = GL_TRUE;
219 ctx->Extensions.ARB_map_buffer_range = GL_TRUE;
220 ctx->Extensions.ARB_multitexture = GL_TRUE;
221 #if FEATURE_queryobj
222 ctx->Extensions.ARB_occlusion_query = GL_TRUE;
223 #endif
224 ctx->Extensions.ARB_point_sprite = GL_TRUE;
225 #if FEATURE_ARB_shader_objects
226 ctx->Extensions.ARB_shader_objects = GL_TRUE;
227 #endif
228 #if FEATURE_ARB_shading_language_100
229 ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
230 #endif
231 #if FEATURE_ARB_shading_language_120
232 ctx->Extensions.ARB_shading_language_120 = GL_TRUE;
233 #endif
234 ctx->Extensions.ARB_shadow = GL_TRUE;
235 ctx->Extensions.ARB_shadow_ambient = GL_TRUE;
236 ctx->Extensions.ARB_texture_border_clamp = GL_TRUE;
237 ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
238 ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
239 ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
240 ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
241 /*ctx->Extensions.ARB_texture_float = GL_TRUE;*/
242 ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE;
243 ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
244 ctx->Extensions.ARB_vertex_array_object = GL_TRUE;
245 #if FEATURE_ARB_vertex_program
246 ctx->Extensions.ARB_vertex_program = GL_TRUE;
247 #endif
248 #if FEATURE_ARB_vertex_shader
249 ctx->Extensions.ARB_vertex_shader = GL_TRUE;
250 #endif
251 #if FEATURE_ARB_vertex_buffer_object
252 /*ctx->Extensions.ARB_vertex_buffer_object = GL_TRUE;*/
253 #endif
254 #if FEATURE_ARB_sync
255 ctx->Extensions.ARB_sync = GL_TRUE;
256 #endif
257 ctx->Extensions.APPLE_vertex_array_object = GL_TRUE;
258 ctx->Extensions.ATI_envmap_bumpmap = GL_TRUE;
259 #if FEATURE_ATI_fragment_shader
260 ctx->Extensions.ATI_fragment_shader = GL_TRUE;
261 #endif
262 ctx->Extensions.ATI_texture_env_combine3 = GL_TRUE;
263 ctx->Extensions.ATI_texture_mirror_once = GL_TRUE;
264 ctx->Extensions.ATI_separate_stencil = GL_TRUE;
265 ctx->Extensions.EXT_blend_color = GL_TRUE;
266 ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
267 ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
268 ctx->Extensions.EXT_blend_logic_op = GL_TRUE;
269 ctx->Extensions.EXT_blend_minmax = GL_TRUE;
270 ctx->Extensions.EXT_blend_subtract = GL_TRUE;
271 ctx->Extensions.EXT_convolution = GL_TRUE;
272 ctx->Extensions.EXT_depth_bounds_test = GL_TRUE;
273 ctx->Extensions.EXT_fog_coord = GL_TRUE;
274 #if FEATURE_EXT_framebuffer_object
275 ctx->Extensions.EXT_framebuffer_object = GL_TRUE;
276 #endif
277 #if FEATURE_EXT_framebuffer_blit
278 ctx->Extensions.EXT_framebuffer_blit = GL_TRUE;
279 #endif
280 #if FEATURE_ARB_framebuffer_object
281 ctx->Extensions.EXT_framebuffer_multisample = GL_TRUE;
282 #endif
283 ctx->Extensions.EXT_histogram = GL_TRUE;
284 /*ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;*/
285 ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE;
286 ctx->Extensions.EXT_paletted_texture = GL_TRUE;
287 #if FEATURE_EXT_pixel_buffer_object
288 ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
289 #endif
290 ctx->Extensions.EXT_point_parameters = GL_TRUE;
291 ctx->Extensions.EXT_provoking_vertex = GL_TRUE;
292 ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
293 ctx->Extensions.EXT_secondary_color = GL_TRUE;
294 ctx->Extensions.EXT_shared_texture_palette = GL_TRUE;
295 ctx->Extensions.EXT_stencil_wrap = GL_TRUE;
296 ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
297 ctx->Extensions.EXT_texture_env_add = GL_TRUE;
298 ctx->Extensions.EXT_texture_env_combine = GL_TRUE;
299 ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
300 ctx->Extensions.EXT_texture_mirror_clamp = GL_TRUE;
301 ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;
302 #if FEATURE_EXT_texture_sRGB
303 ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
304 #endif
305 ctx->Extensions.EXT_texture_swizzle = GL_TRUE;
306 ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE;
307 /*ctx->Extensions.IBM_multimode_draw_arrays = GL_TRUE;*/
308 ctx->Extensions.MESA_pack_invert = GL_TRUE;
309 ctx->Extensions.MESA_resize_buffers = GL_TRUE;
310 ctx->Extensions.MESA_texture_array = GL_TRUE;
311 ctx->Extensions.MESA_ycbcr_texture = GL_TRUE;
312 ctx->Extensions.NV_blend_square = GL_TRUE;
313 /*ctx->Extensions.NV_light_max_exponent = GL_TRUE;*/
314 ctx->Extensions.NV_point_sprite = GL_TRUE;
315 ctx->Extensions.NV_texture_env_combine4 = GL_TRUE;
316 ctx->Extensions.NV_texture_rectangle = GL_TRUE;
317 /*ctx->Extensions.NV_texgen_reflection = GL_TRUE;*/
318 #if FEATURE_NV_vertex_program
319 ctx->Extensions.NV_vertex_program = GL_TRUE;
320 ctx->Extensions.NV_vertex_program1_1 = GL_TRUE;
321 #endif
322 #if FEATURE_NV_fragment_program
323 ctx->Extensions.NV_fragment_program = GL_TRUE;
324 #endif
325 #if FEATURE_NV_fragment_program && FEATURE_ARB_fragment_program
326 ctx->Extensions.NV_fragment_program_option = GL_TRUE;
327 #endif
328 ctx->Extensions.SGI_color_matrix = GL_TRUE;
329 ctx->Extensions.SGI_color_table = GL_TRUE;
330 ctx->Extensions.SGI_texture_color_table = GL_TRUE;
331 ctx->Extensions.SGIS_generate_mipmap = GL_TRUE;
332 ctx->Extensions.SGIS_texture_edge_clamp = GL_TRUE;
333 #if FEATURE_ARB_vertex_program || FEATURE_ARB_fragment_program
334 ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE;
335 #endif
336 #if FEATURE_texture_fxt1
337 _mesa_enable_extension(ctx, "GL_3DFX_texture_compression_FXT1");
338 #endif
339 #if FEATURE_texture_s3tc
340 if (ctx->Mesa_DXTn) {
341 _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
342 _mesa_enable_extension(ctx, "GL_S3_s3tc");
343 }
344 #endif
345 }
346
347
348 /**
349 * Enable GL_ARB_imaging and all the EXT extensions that are subsets of it.
350 */
351 void
352 _mesa_enable_imaging_extensions(GLcontext *ctx)
353 {
354 ctx->Extensions.ARB_imaging = GL_TRUE;
355 ctx->Extensions.EXT_blend_color = GL_TRUE;
356 ctx->Extensions.EXT_blend_logic_op = GL_TRUE;
357 ctx->Extensions.EXT_blend_minmax = GL_TRUE;
358 ctx->Extensions.EXT_blend_subtract = GL_TRUE;
359 ctx->Extensions.EXT_convolution = GL_TRUE;
360 ctx->Extensions.EXT_histogram = GL_TRUE;
361 ctx->Extensions.SGI_color_matrix = GL_TRUE;
362 ctx->Extensions.SGI_color_table = GL_TRUE;
363 }
364
365
366
367 /**
368 * Enable all OpenGL 1.3 features and extensions.
369 * A convenience function to be called by drivers.
370 */
371 void
372 _mesa_enable_1_3_extensions(GLcontext *ctx)
373 {
374 /*ctx->Extensions.ARB_multisample = GL_TRUE;*/
375 ctx->Extensions.ARB_multitexture = GL_TRUE;
376 ctx->Extensions.ARB_texture_border_clamp = GL_TRUE;
377 /*ctx->Extensions.ARB_texture_compression = GL_TRUE;*/
378 ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
379 ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
380 ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
381 ctx->Extensions.EXT_texture_env_add = GL_TRUE;
382 /*ctx->Extensions.ARB_transpose_matrix = GL_TRUE;*/
383 }
384
385
386
387 /**
388 * Enable all OpenGL 1.4 features and extensions.
389 * A convenience function to be called by drivers.
390 */
391 void
392 _mesa_enable_1_4_extensions(GLcontext *ctx)
393 {
394 ctx->Extensions.ARB_depth_texture = GL_TRUE;
395 ctx->Extensions.ARB_shadow = GL_TRUE;
396 ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
397 ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE;
398 ctx->Extensions.ARB_window_pos = GL_TRUE;
399 ctx->Extensions.EXT_blend_color = GL_TRUE;
400 ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
401 ctx->Extensions.EXT_blend_minmax = GL_TRUE;
402 ctx->Extensions.EXT_blend_subtract = GL_TRUE;
403 ctx->Extensions.EXT_fog_coord = GL_TRUE;
404 /*ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;*/
405 ctx->Extensions.EXT_point_parameters = GL_TRUE;
406 ctx->Extensions.EXT_secondary_color = GL_TRUE;
407 ctx->Extensions.EXT_stencil_wrap = GL_TRUE;
408 ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;
409 ctx->Extensions.SGIS_generate_mipmap = GL_TRUE;
410 }
411
412
413 /**
414 * Enable all OpenGL 1.5 features and extensions.
415 * A convenience function to be called by drivers.
416 */
417 void
418 _mesa_enable_1_5_extensions(GLcontext *ctx)
419 {
420 ctx->Extensions.ARB_occlusion_query = GL_TRUE;
421 /*ctx->Extensions.ARB_vertex_buffer_object = GL_TRUE;*/
422 ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
423 }
424
425
426 /**
427 * Enable all OpenGL 2.0 features and extensions.
428 * A convenience function to be called by drivers.
429 */
430 void
431 _mesa_enable_2_0_extensions(GLcontext *ctx)
432 {
433 /*ctx->Extensions.ARB_draw_buffers = GL_TRUE;*/
434 #if FEATURE_ARB_fragment_shader
435 ctx->Extensions.ARB_fragment_shader = GL_TRUE;
436 #endif
437 ctx->Extensions.ARB_point_sprite = GL_TRUE;
438 ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
439 ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
440 #if FEATURE_ARB_shader_objects
441 ctx->Extensions.ARB_shader_objects = GL_TRUE;
442 #endif
443 #if FEATURE_ARB_shading_language_100
444 ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
445 #endif
446 ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
447 #if FEATURE_ARB_vertex_shader
448 ctx->Extensions.ARB_vertex_shader = GL_TRUE;
449 #endif
450 }
451
452
453 /**
454 * Enable all OpenGL 2.1 features and extensions.
455 * A convenience function to be called by drivers.
456 */
457 void
458 _mesa_enable_2_1_extensions(GLcontext *ctx)
459 {
460 #if FEATURE_EXT_pixel_buffer_object
461 ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
462 #endif
463 #if FEATURE_EXT_texture_sRGB
464 ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
465 #endif
466 #ifdef FEATURE_ARB_shading_language_120
467 ctx->Extensions.ARB_shading_language_120 = GL_TRUE;
468 #endif
469 }
470
471
472
473 /**
474 * Either enable or disable the named extension.
475 * \return GL_TRUE for success, GL_FALSE if invalid extension name
476 */
477 static GLboolean
478 set_extension( GLcontext *ctx, const char *name, GLboolean state )
479 {
480 GLboolean *base = (GLboolean *) &ctx->Extensions;
481 GLuint i;
482
483 if (ctx->Extensions.String) {
484 /* The string was already queried - can't change it now! */
485 _mesa_problem(ctx, "Trying to enable/disable extension after glGetString(GL_EXTENSIONS): %s", name);
486 return GL_FALSE;
487 }
488
489 for (i = 0 ; i < Elements(default_extensions) ; i++) {
490 if (_mesa_strcmp(default_extensions[i].name, name) == 0) {
491 if (default_extensions[i].flag_offset) {
492 GLboolean *enabled = base + default_extensions[i].flag_offset;
493 *enabled = state;
494 }
495 return GL_TRUE;
496 }
497 }
498 return GL_FALSE;
499 }
500
501
502 /**
503 * Enable the named extension.
504 * Typically called by drivers.
505 */
506 void
507 _mesa_enable_extension( GLcontext *ctx, const char *name )
508 {
509 if (!set_extension(ctx, name, GL_TRUE))
510 _mesa_problem(ctx, "Trying to enable unknown extension: %s", name);
511 }
512
513
514 /**
515 * Disable the named extension.
516 * XXX is this really needed???
517 */
518 void
519 _mesa_disable_extension( GLcontext *ctx, const char *name )
520 {
521 if (!set_extension(ctx, name, GL_FALSE))
522 _mesa_problem(ctx, "Trying to disable unknown extension: %s", name);
523 }
524
525
526 /**
527 * Check if the i-th extension is enabled.
528 */
529 static GLboolean
530 extension_enabled(GLcontext *ctx, GLuint index)
531 {
532 const GLboolean *base = (const GLboolean *) &ctx->Extensions;
533 if (!default_extensions[index].flag_offset ||
534 *(base + default_extensions[index].flag_offset)) {
535 return GL_TRUE;
536 }
537 else {
538 return GL_FALSE;
539 }
540 }
541
542
543 /**
544 * Test if the named extension is enabled in this context.
545 */
546 GLboolean
547 _mesa_extension_is_enabled( GLcontext *ctx, const char *name )
548 {
549 GLuint i;
550
551 for (i = 0 ; i < Elements(default_extensions) ; i++) {
552 if (_mesa_strcmp(default_extensions[i].name, name) == 0) {
553 return extension_enabled(ctx, i);
554 }
555 }
556 return GL_FALSE;
557 }
558
559
560 /**
561 * Append string 'b' onto string 'a'. Free 'a' and return new string.
562 */
563 static char *
564 append(const char *a, const char *b)
565 {
566 const GLuint aLen = a ? _mesa_strlen(a) : 0;
567 const GLuint bLen = b ? _mesa_strlen(b) : 0;
568 char *s = _mesa_calloc(aLen + bLen + 1);
569 if (s) {
570 if (a)
571 _mesa_memcpy(s, a, aLen);
572 if (b)
573 _mesa_memcpy(s + aLen, b, bLen);
574 s[aLen + bLen] = '\0';
575 }
576 if (a)
577 _mesa_free((void *) a);
578 return s;
579 }
580
581
582 /**
583 * Check the MESA_EXTENSION_OVERRIDE env var.
584 * For extension names that are recognized, turn them on. For extension
585 * names that are recognized and prefixed with '-', turn them off.
586 * Return a string of the unknown/leftover names.
587 */
588 static const char *
589 get_extension_override( GLcontext *ctx )
590 {
591 const char *envExt = _mesa_getenv("MESA_EXTENSION_OVERRIDE");
592 char *extraExt = NULL;
593 char ext[1000];
594 GLuint extLen = 0;
595 GLuint i;
596 GLboolean disableExt = GL_FALSE;
597
598 if (!envExt)
599 return NULL;
600
601 for (i = 0; ; i++) {
602 if (envExt[i] == '\0' || envExt[i] == ' ') {
603 /* terminate/process 'ext' if extLen > 0 */
604 if (extLen > 0) {
605 assert(extLen < sizeof(ext));
606 /* enable extension named by 'ext' */
607 ext[extLen] = 0;
608 if (!set_extension(ctx, ext, !disableExt)) {
609 /* unknown extension name, append it to extraExt */
610 if (extraExt) {
611 extraExt = append(extraExt, " ");
612 }
613 extraExt = append(extraExt, ext);
614 }
615 extLen = 0;
616 disableExt = GL_FALSE;
617 }
618 if (envExt[i] == '\0')
619 break;
620 }
621 else if (envExt[i] == '-') {
622 disableExt = GL_TRUE;
623 }
624 else {
625 /* accumulate this non-space character */
626 ext[extLen++] = envExt[i];
627 }
628 }
629
630 return extraExt;
631 }
632
633
634 /**
635 * Run through the default_extensions array above and set the
636 * ctx->Extensions.ARB/EXT_* flags accordingly.
637 * To be called during context initialization.
638 */
639 void
640 _mesa_init_extensions( GLcontext *ctx )
641 {
642 GLboolean *base = (GLboolean *) &ctx->Extensions;
643 GLuint i;
644
645 for (i = 0 ; i < Elements(default_extensions) ; i++) {
646 if (default_extensions[i].enabled &&
647 default_extensions[i].flag_offset) {
648 *(base + default_extensions[i].flag_offset) = GL_TRUE;
649 }
650 }
651 }
652
653
654 /**
655 * Construct the GL_EXTENSIONS string. Called the first time that
656 * glGetString(GL_EXTENSIONS) is called.
657 */
658 GLubyte *
659 _mesa_make_extension_string( GLcontext *ctx )
660 {
661 const char *extraExt = get_extension_override(ctx);
662 GLuint extStrLen = 0;
663 char *s;
664 GLuint i;
665
666 /* first, compute length of the extension string */
667 for (i = 0 ; i < Elements(default_extensions) ; i++) {
668 if (extension_enabled(ctx, i)) {
669 extStrLen += (GLuint)_mesa_strlen(default_extensions[i].name) + 1;
670 }
671 }
672
673 if (extraExt)
674 extStrLen += _mesa_strlen(extraExt) + 1; /* +1 for space */
675
676 /* allocate the extension string */
677 s = (char *) _mesa_malloc(extStrLen);
678 if (!s)
679 return NULL;
680
681 /* second, build the extension string */
682 extStrLen = 0;
683 for (i = 0 ; i < Elements(default_extensions) ; i++) {
684 if (extension_enabled(ctx, i)) {
685 GLuint len = (GLuint)_mesa_strlen(default_extensions[i].name);
686 _mesa_memcpy(s + extStrLen, default_extensions[i].name, len);
687 extStrLen += len;
688 s[extStrLen] = ' ';
689 extStrLen++;
690 }
691 }
692 ASSERT(extStrLen > 0);
693
694 s[extStrLen - 1] = 0; /* -1 to overwrite trailing the ' ' */
695
696 if (extraExt) {
697 s = append(s, " ");
698 s = append(s, extraExt);
699 }
700
701 return (GLubyte *) s;
702 }
703
704
705 /**
706 * Return number of enabled extensions.
707 */
708 GLuint
709 _mesa_get_extension_count(GLcontext *ctx)
710 {
711 GLuint i;
712
713 /* only count once */
714 if (!ctx->Extensions.Count) {
715 for (i = 0; i < Elements(default_extensions); i++) {
716 if (extension_enabled(ctx, i)) {
717 ctx->Extensions.Count++;
718 }
719 }
720 }
721
722 if (0)
723 _mesa_debug(ctx, "%u of %d extensions enabled\n", ctx->Extensions.Count,
724 Elements(default_extensions));
725
726 return ctx->Extensions.Count;
727 }