Merge branch 'mesa_7_6_branch' of git+ssh://agd5f@git.freedesktop.org/git/mesa/mesa
[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 { ON, "GL_EXT_draw_range_elements", F(EXT_draw_range_elements) },
107 { OFF, "GL_EXT_framebuffer_object", F(EXT_framebuffer_object) },
108 { OFF, "GL_EXT_framebuffer_blit", F(EXT_framebuffer_blit) },
109 { OFF, "GL_EXT_fog_coord", F(EXT_fog_coord) },
110 { OFF, "GL_EXT_gpu_program_parameters", F(EXT_gpu_program_parameters) },
111 { OFF, "GL_EXT_histogram", F(EXT_histogram) },
112 { ON, "GL_EXT_multi_draw_arrays", F(EXT_multi_draw_arrays) },
113 { OFF, "GL_EXT_packed_depth_stencil", F(EXT_packed_depth_stencil) },
114 { ON, "GL_EXT_packed_pixels", F(EXT_packed_pixels) },
115 { OFF, "GL_EXT_paletted_texture", F(EXT_paletted_texture) },
116 { OFF, "GL_EXT_pixel_buffer_object", F(EXT_pixel_buffer_object) },
117 { OFF, "GL_EXT_point_parameters", F(EXT_point_parameters) },
118 { ON, "GL_EXT_polygon_offset", F(EXT_polygon_offset) },
119 { OFF, "GL_EXT_provoking_vertex", F(EXT_provoking_vertex) },
120 { ON, "GL_EXT_rescale_normal", F(EXT_rescale_normal) },
121 { OFF, "GL_EXT_secondary_color", F(EXT_secondary_color) },
122 { ON, "GL_EXT_separate_specular_color", F(EXT_separate_specular_color) },
123 { OFF, "GL_EXT_shadow_funcs", F(EXT_shadow_funcs) },
124 { OFF, "GL_EXT_shared_texture_palette", F(EXT_shared_texture_palette) },
125 { OFF, "GL_EXT_stencil_two_side", F(EXT_stencil_two_side) },
126 { OFF, "GL_EXT_stencil_wrap", F(EXT_stencil_wrap) },
127 { ON, "GL_EXT_subtexture", F(EXT_subtexture) },
128 { ON, "GL_EXT_texture", F(EXT_texture) },
129 { ON, "GL_EXT_texture3D", F(EXT_texture3D) },
130 { OFF, "GL_EXT_texture_compression_s3tc", F(EXT_texture_compression_s3tc) },
131 { ON, "GL_EXT_texture_edge_clamp", F(SGIS_texture_edge_clamp) },
132 { OFF, "GL_EXT_texture_env_add", F(EXT_texture_env_add) },
133 { OFF, "GL_EXT_texture_env_combine", F(EXT_texture_env_combine) },
134 { OFF, "GL_EXT_texture_env_dot3", F(EXT_texture_env_dot3) },
135 { OFF, "GL_EXT_texture_filter_anisotropic", F(EXT_texture_filter_anisotropic) },
136 { OFF, "GL_EXT_texture_lod_bias", F(EXT_texture_lod_bias) },
137 { OFF, "GL_EXT_texture_mirror_clamp", F(EXT_texture_mirror_clamp) },
138 { ON, "GL_EXT_texture_object", F(EXT_texture_object) },
139 { OFF, "GL_EXT_texture_rectangle", F(NV_texture_rectangle) },
140 { OFF, "GL_EXT_texture_sRGB", F(EXT_texture_sRGB) },
141 { OFF, "GL_EXT_texture_swizzle", F(EXT_texture_swizzle) },
142 { OFF, "GL_EXT_timer_query", F(EXT_timer_query) },
143 { ON, "GL_EXT_vertex_array", F(EXT_vertex_array) },
144 { OFF, "GL_EXT_vertex_array_bgra", F(EXT_vertex_array_bgra) },
145 { OFF, "GL_EXT_vertex_array_set", F(EXT_vertex_array_set) },
146 { OFF, "GL_3DFX_texture_compression_FXT1", F(TDFX_texture_compression_FXT1) },
147 { OFF, "GL_APPLE_client_storage", F(APPLE_client_storage) },
148 { ON, "GL_APPLE_packed_pixels", F(APPLE_packed_pixels) },
149 { OFF, "GL_APPLE_vertex_array_object", F(APPLE_vertex_array_object) },
150 { OFF, "GL_ATI_blend_equation_separate", F(EXT_blend_equation_separate) },
151 { OFF, "GL_ATI_envmap_bumpmap", F(ATI_envmap_bumpmap) },
152 { OFF, "GL_ATI_texture_env_combine3", F(ATI_texture_env_combine3)},
153 { OFF, "GL_ATI_texture_mirror_once", F(ATI_texture_mirror_once)},
154 { OFF, "GL_ATI_fragment_shader", F(ATI_fragment_shader)},
155 { OFF, "GL_ATI_separate_stencil", F(ATI_separate_stencil)},
156 { ON, "GL_IBM_multimode_draw_arrays", F(IBM_multimode_draw_arrays) },
157 { ON, "GL_IBM_rasterpos_clip", F(IBM_rasterpos_clip) },
158 { OFF, "GL_IBM_texture_mirrored_repeat", F(ARB_texture_mirrored_repeat)},
159 { OFF, "GL_INGR_blend_func_separate", F(EXT_blend_func_separate) },
160 { OFF, "GL_MESA_pack_invert", F(MESA_pack_invert) },
161 { OFF, "GL_MESA_packed_depth_stencil", F(MESA_packed_depth_stencil) },
162 { OFF, "GL_MESA_resize_buffers", F(MESA_resize_buffers) },
163 { OFF, "GL_MESA_texture_array", F(MESA_texture_array) },
164 { OFF, "GL_MESA_texture_signed_rgba", F(MESA_texture_signed_rgba) },
165 { OFF, "GL_MESA_ycbcr_texture", F(MESA_ycbcr_texture) },
166 { ON, "GL_MESA_window_pos", F(ARB_window_pos) },
167 { OFF, "GL_NV_blend_square", F(NV_blend_square) },
168 { OFF, "GL_NV_depth_clamp", F(ARB_depth_clamp) },
169 { OFF, "GL_NV_fragment_program", F(NV_fragment_program) },
170 { OFF, "GL_NV_fragment_program_option", F(NV_fragment_program_option) },
171 { ON, "GL_NV_light_max_exponent", F(NV_light_max_exponent) },
172 { OFF, "GL_NV_point_sprite", F(NV_point_sprite) },
173 { OFF, "GL_NV_texture_env_combine4", F(NV_texture_env_combine4) },
174 { OFF, "GL_NV_texture_rectangle", F(NV_texture_rectangle) },
175 { ON, "GL_NV_texgen_reflection", F(NV_texgen_reflection) },
176 { OFF, "GL_NV_vertex_program", F(NV_vertex_program) },
177 { OFF, "GL_NV_vertex_program1_1", F(NV_vertex_program1_1) },
178 { ON, "GL_OES_read_format", F(OES_read_format) },
179 { OFF, "GL_SGI_color_matrix", F(SGI_color_matrix) },
180 { OFF, "GL_SGI_color_table", F(SGI_color_table) },
181 { OFF, "GL_SGI_texture_color_table", F(SGI_texture_color_table) },
182 { OFF, "GL_SGIS_generate_mipmap", F(SGIS_generate_mipmap) },
183 { OFF, "GL_SGIS_texture_border_clamp", F(ARB_texture_border_clamp) },
184 { ON, "GL_SGIS_texture_edge_clamp", F(SGIS_texture_edge_clamp) },
185 { ON, "GL_SGIS_texture_lod", F(SGIS_texture_lod) },
186 { ON, "GL_SUN_multi_draw_arrays", F(EXT_multi_draw_arrays) },
187 { OFF, "GL_S3_s3tc", F(S3_s3tc) },
188 };
189
190
191
192 /**
193 * Enable all extensions suitable for a software-only renderer.
194 * This is a convenience function used by the XMesa, OSMesa, GGI drivers, etc.
195 */
196 void
197 _mesa_enable_sw_extensions(GLcontext *ctx)
198 {
199 ctx->Extensions.ARB_copy_buffer = GL_TRUE;
200 ctx->Extensions.ARB_depth_clamp = GL_TRUE;
201 ctx->Extensions.ARB_depth_texture = GL_TRUE;
202 /*ctx->Extensions.ARB_draw_buffers = GL_TRUE;*/
203 ctx->Extensions.ARB_draw_elements_base_vertex = GL_TRUE;
204 #if FEATURE_ARB_fragment_program
205 ctx->Extensions.ARB_fragment_program = GL_TRUE;
206 ctx->Extensions.ARB_fragment_program_shadow = GL_TRUE;
207 #endif
208 #if FEATURE_ARB_fragment_shader
209 ctx->Extensions.ARB_fragment_shader = GL_TRUE;
210 #endif
211 #if FEATURE_ARB_framebuffer_object
212 ctx->Extensions.ARB_framebuffer_object = GL_TRUE;
213 #endif
214 ctx->Extensions.ARB_half_float_pixel = GL_TRUE;
215 ctx->Extensions.ARB_imaging = GL_TRUE;
216 ctx->Extensions.ARB_map_buffer_range = GL_TRUE;
217 ctx->Extensions.ARB_multitexture = GL_TRUE;
218 #if FEATURE_queryobj
219 ctx->Extensions.ARB_occlusion_query = GL_TRUE;
220 #endif
221 ctx->Extensions.ARB_point_sprite = GL_TRUE;
222 #if FEATURE_ARB_shader_objects
223 ctx->Extensions.ARB_shader_objects = GL_TRUE;
224 #endif
225 #if FEATURE_ARB_shading_language_100
226 ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
227 #endif
228 #if FEATURE_ARB_shading_language_120
229 ctx->Extensions.ARB_shading_language_120 = GL_TRUE;
230 #endif
231 ctx->Extensions.ARB_shadow = GL_TRUE;
232 ctx->Extensions.ARB_shadow_ambient = GL_TRUE;
233 ctx->Extensions.ARB_texture_border_clamp = GL_TRUE;
234 ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
235 ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
236 ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
237 ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
238 /*ctx->Extensions.ARB_texture_float = GL_TRUE;*/
239 ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE;
240 ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
241 ctx->Extensions.ARB_vertex_array_object = GL_TRUE;
242 #if FEATURE_ARB_vertex_program
243 ctx->Extensions.ARB_vertex_program = GL_TRUE;
244 #endif
245 #if FEATURE_ARB_vertex_shader
246 ctx->Extensions.ARB_vertex_shader = GL_TRUE;
247 #endif
248 #if FEATURE_ARB_vertex_buffer_object
249 /*ctx->Extensions.ARB_vertex_buffer_object = GL_TRUE;*/
250 #endif
251 #if FEATURE_ARB_sync
252 ctx->Extensions.ARB_sync = GL_TRUE;
253 #endif
254 ctx->Extensions.APPLE_vertex_array_object = GL_TRUE;
255 ctx->Extensions.ATI_envmap_bumpmap = GL_TRUE;
256 #if FEATURE_ATI_fragment_shader
257 ctx->Extensions.ATI_fragment_shader = GL_TRUE;
258 #endif
259 ctx->Extensions.ATI_texture_env_combine3 = GL_TRUE;
260 ctx->Extensions.ATI_texture_mirror_once = GL_TRUE;
261 ctx->Extensions.ATI_separate_stencil = GL_TRUE;
262 ctx->Extensions.EXT_blend_color = GL_TRUE;
263 ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
264 ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
265 ctx->Extensions.EXT_blend_logic_op = GL_TRUE;
266 ctx->Extensions.EXT_blend_minmax = GL_TRUE;
267 ctx->Extensions.EXT_blend_subtract = GL_TRUE;
268 ctx->Extensions.EXT_convolution = GL_TRUE;
269 ctx->Extensions.EXT_depth_bounds_test = GL_TRUE;
270 ctx->Extensions.EXT_fog_coord = GL_TRUE;
271 #if FEATURE_EXT_framebuffer_object
272 ctx->Extensions.EXT_framebuffer_object = GL_TRUE;
273 #endif
274 #if FEATURE_EXT_framebuffer_blit
275 ctx->Extensions.EXT_framebuffer_blit = GL_TRUE;
276 #endif
277 ctx->Extensions.EXT_histogram = GL_TRUE;
278 /*ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;*/
279 ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE;
280 ctx->Extensions.EXT_paletted_texture = GL_TRUE;
281 #if FEATURE_EXT_pixel_buffer_object
282 ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
283 #endif
284 ctx->Extensions.EXT_point_parameters = GL_TRUE;
285 ctx->Extensions.EXT_provoking_vertex = GL_TRUE;
286 ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
287 ctx->Extensions.EXT_secondary_color = GL_TRUE;
288 ctx->Extensions.EXT_shared_texture_palette = GL_TRUE;
289 ctx->Extensions.EXT_stencil_wrap = GL_TRUE;
290 ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
291 ctx->Extensions.EXT_texture_env_add = GL_TRUE;
292 ctx->Extensions.EXT_texture_env_combine = GL_TRUE;
293 ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
294 ctx->Extensions.EXT_texture_mirror_clamp = GL_TRUE;
295 ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;
296 #if FEATURE_EXT_texture_sRGB
297 ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
298 #endif
299 ctx->Extensions.EXT_texture_swizzle = GL_TRUE;
300 ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE;
301 /*ctx->Extensions.IBM_multimode_draw_arrays = GL_TRUE;*/
302 ctx->Extensions.MESA_pack_invert = GL_TRUE;
303 ctx->Extensions.MESA_resize_buffers = GL_TRUE;
304 ctx->Extensions.MESA_texture_array = GL_TRUE;
305 ctx->Extensions.MESA_ycbcr_texture = GL_TRUE;
306 ctx->Extensions.NV_blend_square = GL_TRUE;
307 /*ctx->Extensions.NV_light_max_exponent = GL_TRUE;*/
308 ctx->Extensions.NV_point_sprite = GL_TRUE;
309 ctx->Extensions.NV_texture_env_combine4 = GL_TRUE;
310 ctx->Extensions.NV_texture_rectangle = GL_TRUE;
311 /*ctx->Extensions.NV_texgen_reflection = GL_TRUE;*/
312 #if FEATURE_NV_vertex_program
313 ctx->Extensions.NV_vertex_program = GL_TRUE;
314 ctx->Extensions.NV_vertex_program1_1 = GL_TRUE;
315 #endif
316 #if FEATURE_NV_fragment_program
317 ctx->Extensions.NV_fragment_program = GL_TRUE;
318 #endif
319 #if FEATURE_NV_fragment_program && FEATURE_ARB_fragment_program
320 ctx->Extensions.NV_fragment_program_option = GL_TRUE;
321 #endif
322 ctx->Extensions.SGI_color_matrix = GL_TRUE;
323 ctx->Extensions.SGI_color_table = GL_TRUE;
324 ctx->Extensions.SGI_texture_color_table = GL_TRUE;
325 ctx->Extensions.SGIS_generate_mipmap = GL_TRUE;
326 ctx->Extensions.SGIS_texture_edge_clamp = GL_TRUE;
327 #if FEATURE_ARB_vertex_program || FEATURE_ARB_fragment_program
328 ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE;
329 #endif
330 #if FEATURE_texture_fxt1
331 _mesa_enable_extension(ctx, "GL_3DFX_texture_compression_FXT1");
332 #endif
333 #if FEATURE_texture_s3tc
334 if (ctx->Mesa_DXTn) {
335 _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
336 _mesa_enable_extension(ctx, "GL_S3_s3tc");
337 }
338 #endif
339 }
340
341
342 /**
343 * Enable GL_ARB_imaging and all the EXT extensions that are subsets of it.
344 */
345 void
346 _mesa_enable_imaging_extensions(GLcontext *ctx)
347 {
348 ctx->Extensions.ARB_imaging = GL_TRUE;
349 ctx->Extensions.EXT_blend_color = GL_TRUE;
350 ctx->Extensions.EXT_blend_logic_op = GL_TRUE;
351 ctx->Extensions.EXT_blend_minmax = GL_TRUE;
352 ctx->Extensions.EXT_blend_subtract = GL_TRUE;
353 ctx->Extensions.EXT_convolution = GL_TRUE;
354 ctx->Extensions.EXT_histogram = GL_TRUE;
355 ctx->Extensions.SGI_color_matrix = GL_TRUE;
356 ctx->Extensions.SGI_color_table = GL_TRUE;
357 }
358
359
360
361 /**
362 * Enable all OpenGL 1.3 features and extensions.
363 * A convenience function to be called by drivers.
364 */
365 void
366 _mesa_enable_1_3_extensions(GLcontext *ctx)
367 {
368 /*ctx->Extensions.ARB_multisample = GL_TRUE;*/
369 ctx->Extensions.ARB_multitexture = GL_TRUE;
370 ctx->Extensions.ARB_texture_border_clamp = GL_TRUE;
371 /*ctx->Extensions.ARB_texture_compression = GL_TRUE;*/
372 ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
373 ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
374 ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
375 ctx->Extensions.EXT_texture_env_add = GL_TRUE;
376 /*ctx->Extensions.ARB_transpose_matrix = GL_TRUE;*/
377 }
378
379
380
381 /**
382 * Enable all OpenGL 1.4 features and extensions.
383 * A convenience function to be called by drivers.
384 */
385 void
386 _mesa_enable_1_4_extensions(GLcontext *ctx)
387 {
388 ctx->Extensions.ARB_depth_texture = GL_TRUE;
389 ctx->Extensions.ARB_shadow = GL_TRUE;
390 ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
391 ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE;
392 ctx->Extensions.ARB_window_pos = GL_TRUE;
393 ctx->Extensions.EXT_blend_color = GL_TRUE;
394 ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
395 ctx->Extensions.EXT_blend_minmax = GL_TRUE;
396 ctx->Extensions.EXT_blend_subtract = GL_TRUE;
397 ctx->Extensions.EXT_fog_coord = GL_TRUE;
398 /*ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;*/
399 ctx->Extensions.EXT_point_parameters = GL_TRUE;
400 ctx->Extensions.EXT_secondary_color = GL_TRUE;
401 ctx->Extensions.EXT_stencil_wrap = GL_TRUE;
402 ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;
403 ctx->Extensions.SGIS_generate_mipmap = GL_TRUE;
404 }
405
406
407 /**
408 * Enable all OpenGL 1.5 features and extensions.
409 * A convenience function to be called by drivers.
410 */
411 void
412 _mesa_enable_1_5_extensions(GLcontext *ctx)
413 {
414 ctx->Extensions.ARB_occlusion_query = GL_TRUE;
415 /*ctx->Extensions.ARB_vertex_buffer_object = GL_TRUE;*/
416 ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
417 }
418
419
420 /**
421 * Enable all OpenGL 2.0 features and extensions.
422 * A convenience function to be called by drivers.
423 */
424 void
425 _mesa_enable_2_0_extensions(GLcontext *ctx)
426 {
427 /*ctx->Extensions.ARB_draw_buffers = GL_TRUE;*/
428 #if FEATURE_ARB_fragment_shader
429 ctx->Extensions.ARB_fragment_shader = GL_TRUE;
430 #endif
431 ctx->Extensions.ARB_point_sprite = GL_TRUE;
432 ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
433 ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
434 #if FEATURE_ARB_shader_objects
435 ctx->Extensions.ARB_shader_objects = GL_TRUE;
436 #endif
437 #if FEATURE_ARB_shading_language_100
438 ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
439 #endif
440 ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
441 #if FEATURE_ARB_vertex_shader
442 ctx->Extensions.ARB_vertex_shader = GL_TRUE;
443 #endif
444 }
445
446
447 /**
448 * Enable all OpenGL 2.1 features and extensions.
449 * A convenience function to be called by drivers.
450 */
451 void
452 _mesa_enable_2_1_extensions(GLcontext *ctx)
453 {
454 #if FEATURE_EXT_pixel_buffer_object
455 ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
456 #endif
457 #if FEATURE_EXT_texture_sRGB
458 ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
459 #endif
460 #ifdef FEATURE_ARB_shading_language_120
461 ctx->Extensions.ARB_shading_language_120 = GL_TRUE;
462 #endif
463 }
464
465
466
467 /**
468 * Either enable or disable the named extension.
469 * \return GL_TRUE for success, GL_FALSE if invalid extension name
470 */
471 static GLboolean
472 set_extension( GLcontext *ctx, const char *name, GLboolean state )
473 {
474 GLboolean *base = (GLboolean *) &ctx->Extensions;
475 GLuint i;
476
477 if (ctx->Extensions.String) {
478 /* The string was already queried - can't change it now! */
479 _mesa_problem(ctx, "Trying to enable/disable extension after glGetString(GL_EXTENSIONS): %s", name);
480 return GL_FALSE;
481 }
482
483 for (i = 0 ; i < Elements(default_extensions) ; i++) {
484 if (_mesa_strcmp(default_extensions[i].name, name) == 0) {
485 if (default_extensions[i].flag_offset) {
486 GLboolean *enabled = base + default_extensions[i].flag_offset;
487 *enabled = state;
488 }
489 return GL_TRUE;
490 }
491 }
492 return GL_FALSE;
493 }
494
495
496 /**
497 * Enable the named extension.
498 * Typically called by drivers.
499 */
500 void
501 _mesa_enable_extension( GLcontext *ctx, const char *name )
502 {
503 if (!set_extension(ctx, name, GL_TRUE))
504 _mesa_problem(ctx, "Trying to enable unknown extension: %s", name);
505 }
506
507
508 /**
509 * Disable the named extension.
510 * XXX is this really needed???
511 */
512 void
513 _mesa_disable_extension( GLcontext *ctx, const char *name )
514 {
515 if (!set_extension(ctx, name, GL_FALSE))
516 _mesa_problem(ctx, "Trying to disable unknown extension: %s", name);
517 }
518
519
520 /**
521 * Test if the named extension is enabled in this context.
522 */
523 GLboolean
524 _mesa_extension_is_enabled( GLcontext *ctx, const char *name )
525 {
526 const GLboolean *base = (const GLboolean *) &ctx->Extensions;
527 GLuint i;
528
529 for (i = 0 ; i < Elements(default_extensions) ; i++) {
530 if (_mesa_strcmp(default_extensions[i].name, name) == 0) {
531 if (!default_extensions[i].flag_offset)
532 return GL_TRUE;
533 return *(base + default_extensions[i].flag_offset);
534 }
535 }
536 return GL_FALSE;
537 }
538
539
540 /**
541 * Append string 'b' onto string 'a'. Free 'a' and return new string.
542 */
543 static char *
544 append(const char *a, const char *b)
545 {
546 const GLuint aLen = a ? _mesa_strlen(a) : 0;
547 const GLuint bLen = b ? _mesa_strlen(b) : 0;
548 char *s = _mesa_calloc(aLen + bLen + 1);
549 if (s) {
550 if (a)
551 _mesa_memcpy(s, a, aLen);
552 if (b)
553 _mesa_memcpy(s + aLen, b, bLen);
554 s[aLen + bLen] = '\0';
555 }
556 if (a)
557 _mesa_free((void *) a);
558 return s;
559 }
560
561
562 /**
563 * Check the MESA_EXTENSION_OVERRIDE env var.
564 * For extension names that are recognized, turn them on. For extension
565 * names that are recognized and prefixed with '-', turn them off.
566 * Return a string of the unknown/leftover names.
567 */
568 static const char *
569 get_extension_override( GLcontext *ctx )
570 {
571 const char *envExt = _mesa_getenv("MESA_EXTENSION_OVERRIDE");
572 char *extraExt = NULL;
573 char ext[1000];
574 GLuint extLen = 0;
575 GLuint i;
576 GLboolean disableExt = GL_FALSE;
577
578 if (!envExt)
579 return NULL;
580
581 for (i = 0; ; i++) {
582 if (envExt[i] == '\0' || envExt[i] == ' ') {
583 /* terminate/process 'ext' if extLen > 0 */
584 if (extLen > 0) {
585 assert(extLen < sizeof(ext));
586 /* enable extension named by 'ext' */
587 ext[extLen] = 0;
588 if (!set_extension(ctx, ext, !disableExt)) {
589 /* unknown extension name, append it to extraExt */
590 if (extraExt) {
591 extraExt = append(extraExt, " ");
592 }
593 extraExt = append(extraExt, ext);
594 }
595 extLen = 0;
596 disableExt = GL_FALSE;
597 }
598 if (envExt[i] == '\0')
599 break;
600 }
601 else if (envExt[i] == '-') {
602 disableExt = GL_TRUE;
603 }
604 else {
605 /* accumulate this non-space character */
606 ext[extLen++] = envExt[i];
607 }
608 }
609
610 return extraExt;
611 }
612
613
614 /**
615 * Run through the default_extensions array above and set the
616 * ctx->Extensions.ARB/EXT_* flags accordingly.
617 * To be called during context initialization.
618 */
619 void
620 _mesa_init_extensions( GLcontext *ctx )
621 {
622 GLboolean *base = (GLboolean *) &ctx->Extensions;
623 GLuint i;
624
625 for (i = 0 ; i < Elements(default_extensions) ; i++) {
626 if (default_extensions[i].enabled &&
627 default_extensions[i].flag_offset) {
628 *(base + default_extensions[i].flag_offset) = GL_TRUE;
629 }
630 }
631 }
632
633
634 /**
635 * Construct the GL_EXTENSIONS string. Called the first time that
636 * glGetString(GL_EXTENSIONS) is called.
637 */
638 GLubyte *
639 _mesa_make_extension_string( GLcontext *ctx )
640 {
641 const GLboolean *base = (const GLboolean *) &ctx->Extensions;
642 const char *extraExt = get_extension_override(ctx);
643 GLuint extStrLen = 0;
644 char *s;
645 GLuint i;
646
647 /* first, compute length of the extension string */
648 for (i = 0 ; i < Elements(default_extensions) ; i++) {
649 if (!default_extensions[i].flag_offset ||
650 *(base + default_extensions[i].flag_offset)) {
651 extStrLen += (GLuint)_mesa_strlen(default_extensions[i].name) + 1;
652 }
653 }
654
655 if (extraExt)
656 extStrLen += _mesa_strlen(extraExt) + 1; /* +1 for space */
657
658 /* allocate the extension string */
659 s = (char *) _mesa_malloc(extStrLen);
660 if (!s)
661 return NULL;
662
663 /* second, build the extension string */
664 extStrLen = 0;
665 for (i = 0 ; i < Elements(default_extensions) ; i++) {
666 if (!default_extensions[i].flag_offset ||
667 *(base + default_extensions[i].flag_offset)) {
668 GLuint len = (GLuint)_mesa_strlen(default_extensions[i].name);
669 _mesa_memcpy(s + extStrLen, default_extensions[i].name, len);
670 extStrLen += len;
671 s[extStrLen] = ' ';
672 extStrLen++;
673 }
674 }
675 ASSERT(extStrLen > 0);
676
677 s[extStrLen - 1] = 0; /* -1 to overwrite trailing the ' ' */
678
679 if (extraExt) {
680 s = append(s, " ");
681 s = append(s, extraExt);
682 }
683
684 return (GLubyte *) s;
685 }