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Merge remote branch 'origin/nvc0'
[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 /**
28 * \file
29 * \brief Extension handling
30 */
31
32
33 #include "glheader.h"
34 #include "imports.h"
35 #include "context.h"
36 #include "extensions.h"
37 #include "mfeatures.h"
38 #include "mtypes.h"
39
40 enum {
41 DISABLE = 0,
42 GL = 1 << API_OPENGL,
43 ES1 = 1 << API_OPENGLES,
44 ES2 = 1 << API_OPENGLES2,
45 };
46
47 /**
48 * \brief An element of the \c extension_table.
49 */
50 struct extension {
51 /** Name of extension, such as "GL_ARB_depth_clamp". */
52 const char *name;
53
54 /** Offset (in bytes) of the corresponding member in struct gl_extensions. */
55 size_t offset;
56
57 /** Set of API's in which the extension exists, as a bitset. */
58 uint8_t api_set;
59 };
60
61
62 /**
63 * Given a member \c x of struct gl_extensions, return offset of
64 * \c x in bytes.
65 */
66 #define o(x) offsetof(struct gl_extensions, x)
67
68
69 /**
70 * \brief Table of supported OpenGL extensions for all API's.
71 *
72 * Note: The GL_MESAX_* extensions are placeholders for future ARB extensions.
73 */
74 static const struct extension extension_table[] = {
75 /* ARB Extensions */
76 { "GL_ARB_ES2_compatibility", o(ARB_ES2_compatibility), GL },
77 { "GL_ARB_blend_func_extended", o(ARB_blend_func_extended), GL },
78 { "GL_ARB_copy_buffer", o(ARB_copy_buffer), GL },
79 { "GL_ARB_depth_buffer_float", o(ARB_depth_buffer_float), GL },
80 { "GL_ARB_depth_clamp", o(ARB_depth_clamp), GL },
81 { "GL_ARB_depth_texture", o(ARB_depth_texture), GL },
82 { "GL_ARB_draw_buffers", o(ARB_draw_buffers), GL },
83 { "GL_ARB_draw_buffers_blend", o(ARB_draw_buffers_blend), GL },
84 { "GL_ARB_draw_elements_base_vertex", o(ARB_draw_elements_base_vertex), GL },
85 { "GL_ARB_draw_instanced", o(ARB_draw_instanced), GL },
86 { "GL_ARB_explicit_attrib_location", o(ARB_explicit_attrib_location), GL },
87 { "GL_ARB_fragment_coord_conventions", o(ARB_fragment_coord_conventions), GL },
88 { "GL_ARB_fragment_program", o(ARB_fragment_program), GL },
89 { "GL_ARB_fragment_program_shadow", o(ARB_fragment_program_shadow), GL },
90 { "GL_ARB_fragment_shader", o(ARB_fragment_shader), GL },
91 { "GL_ARB_framebuffer_object", o(ARB_framebuffer_object), GL },
92 { "GL_ARB_framebuffer_sRGB", o(EXT_framebuffer_sRGB), GL },
93 { "GL_ARB_half_float_pixel", o(ARB_half_float_pixel), GL },
94 { "GL_ARB_half_float_vertex", o(ARB_half_float_vertex), GL },
95 { "GL_ARB_instanced_arrays", o(ARB_instanced_arrays), GL },
96 { "GL_ARB_map_buffer_range", o(ARB_map_buffer_range), GL },
97 { "GL_ARB_multisample", o(ARB_multisample), GL },
98 { "GL_ARB_multitexture", o(ARB_multitexture), GL },
99 { "GL_ARB_occlusion_query2", o(ARB_occlusion_query2), GL },
100 { "GL_ARB_occlusion_query", o(ARB_occlusion_query), GL },
101 { "GL_ARB_pixel_buffer_object", o(EXT_pixel_buffer_object), GL },
102 { "GL_ARB_point_parameters", o(EXT_point_parameters), GL },
103 { "GL_ARB_point_sprite", o(ARB_point_sprite), GL },
104 { "GL_ARB_provoking_vertex", o(EXT_provoking_vertex), GL },
105 { "GL_ARB_sampler_objects", o(ARB_sampler_objects), GL },
106 { "GL_ARB_seamless_cube_map", o(ARB_seamless_cube_map), GL },
107 { "GL_ARB_shader_objects", o(ARB_shader_objects), GL },
108 { "GL_ARB_shader_stencil_export", o(ARB_shader_stencil_export), GL },
109 { "GL_ARB_shading_language_100", o(ARB_shading_language_100), GL },
110 { "GL_ARB_shadow_ambient", o(ARB_shadow_ambient), GL },
111 { "GL_ARB_shadow", o(ARB_shadow), GL },
112 { "GL_ARB_sync", o(ARB_sync), GL },
113 { "GL_ARB_texture_border_clamp", o(ARB_texture_border_clamp), GL },
114 { "GL_ARB_texture_buffer_object", o(ARB_texture_buffer_object), GL },
115 { "GL_ARB_texture_compression", o(ARB_texture_compression), GL },
116 { "GL_ARB_texture_compression_rgtc", o(ARB_texture_compression_rgtc), GL },
117 { "GL_ARB_texture_cube_map", o(ARB_texture_cube_map), GL },
118 { "GL_ARB_texture_env_add", o(EXT_texture_env_add), GL },
119 { "GL_ARB_texture_env_combine", o(ARB_texture_env_combine), GL },
120 { "GL_ARB_texture_env_crossbar", o(ARB_texture_env_crossbar), GL },
121 { "GL_ARB_texture_env_dot3", o(ARB_texture_env_dot3), GL },
122 { "GL_ARB_texture_mirrored_repeat", o(ARB_texture_mirrored_repeat), GL },
123 { "GL_ARB_texture_multisample", o(ARB_texture_multisample), GL },
124 { "GL_ARB_texture_non_power_of_two", o(ARB_texture_non_power_of_two), GL },
125 { "GL_ARB_texture_rectangle", o(NV_texture_rectangle), GL },
126 { "GL_ARB_texture_rgb10_a2ui", o(ARB_texture_rgb10_a2ui), GL },
127 { "GL_ARB_texture_rg", o(ARB_texture_rg), GL },
128 { "GL_ARB_texture_swizzle", o(EXT_texture_swizzle), GL },
129 { "GL_ARB_transform_feedback2", o(ARB_transform_feedback2), GL },
130 { "GL_ARB_transpose_matrix", o(ARB_transpose_matrix), GL },
131 { "GL_ARB_uniform_buffer_object", o(ARB_uniform_buffer_object), GL },
132 { "GL_ARB_vertex_array_bgra", o(EXT_vertex_array_bgra), GL },
133 { "GL_ARB_vertex_array_object", o(ARB_vertex_array_object), GL },
134 { "GL_ARB_vertex_buffer_object", o(ARB_vertex_buffer_object), GL },
135 { "GL_ARB_vertex_program", o(ARB_vertex_program), GL },
136 { "GL_ARB_vertex_shader", o(ARB_vertex_shader), GL },
137 { "GL_ARB_vertex_type_2_10_10_10_rev", o(ARB_vertex_type_2_10_10_10_rev), GL },
138 { "GL_ARB_window_pos", o(ARB_window_pos), GL },
139
140 /* EXT extensions */
141 { "GL_EXT_abgr", o(EXT_abgr), GL },
142 { "GL_EXT_bgra", o(EXT_bgra), GL },
143 { "GL_EXT_blend_color", o(EXT_blend_color), GL },
144 { "GL_EXT_blend_equation_separate", o(EXT_blend_equation_separate), GL },
145 { "GL_EXT_blend_func_separate", o(EXT_blend_func_separate), GL },
146 { "GL_EXT_blend_logic_op", o(EXT_blend_logic_op), GL },
147 { "GL_EXT_blend_minmax", o(EXT_blend_minmax), GL | ES1 | ES2 },
148 { "GL_EXT_blend_subtract", o(EXT_blend_subtract), GL },
149 { "GL_EXT_clip_volume_hint", o(EXT_clip_volume_hint), GL },
150 { "GL_EXT_compiled_vertex_array", o(EXT_compiled_vertex_array), GL },
151 { "GL_EXT_copy_texture", o(EXT_copy_texture), GL },
152 { "GL_EXT_depth_bounds_test", o(EXT_depth_bounds_test), GL },
153 { "GL_EXT_draw_buffers2", o(EXT_draw_buffers2), GL },
154 { "GL_EXT_draw_instanced", o(ARB_draw_instanced), GL },
155 { "GL_EXT_draw_range_elements", o(EXT_draw_range_elements), GL },
156 { "GL_EXT_fog_coord", o(EXT_fog_coord), GL },
157 { "GL_EXT_framebuffer_blit", o(EXT_framebuffer_blit), GL },
158 { "GL_EXT_framebuffer_multisample", o(EXT_framebuffer_multisample), GL },
159 { "GL_EXT_framebuffer_object", o(EXT_framebuffer_object), GL },
160 { "GL_EXT_framebuffer_sRGB", o(EXT_framebuffer_sRGB), GL },
161 { "GL_EXT_gpu_program_parameters", o(EXT_gpu_program_parameters), GL },
162 { "GL_EXT_gpu_shader4", o(EXT_gpu_shader4), GL },
163 { "GL_EXT_multi_draw_arrays", o(EXT_multi_draw_arrays), GL | ES1 | ES2 },
164 { "GL_EXT_packed_depth_stencil", o(EXT_packed_depth_stencil), GL },
165 { "GL_EXT_packed_float", o(EXT_packed_float), GL },
166 { "GL_EXT_packed_pixels", o(EXT_packed_pixels), GL },
167 { "GL_EXT_paletted_texture", o(EXT_paletted_texture), GL },
168 { "GL_EXT_pixel_buffer_object", o(EXT_pixel_buffer_object), GL },
169 { "GL_EXT_point_parameters", o(EXT_point_parameters), GL },
170 { "GL_EXT_polygon_offset", o(EXT_polygon_offset), GL },
171 { "GL_EXT_provoking_vertex", o(EXT_provoking_vertex), GL },
172 { "GL_EXT_rescale_normal", o(EXT_rescale_normal), GL },
173 { "GL_EXT_secondary_color", o(EXT_secondary_color), GL },
174 { "GL_EXT_separate_shader_objects", o(EXT_separate_shader_objects), GL },
175 { "GL_EXT_separate_specular_color", o(EXT_separate_specular_color), GL },
176 { "GL_EXT_shadow_funcs", o(EXT_shadow_funcs), GL },
177 { "GL_EXT_shared_texture_palette", o(EXT_shared_texture_palette), GL },
178 { "GL_EXT_stencil_two_side", o(EXT_stencil_two_side), GL },
179 { "GL_EXT_stencil_wrap", o(EXT_stencil_wrap), GL },
180 { "GL_EXT_subtexture", o(EXT_subtexture), GL },
181 { "GL_EXT_texture3D", o(EXT_texture3D), GL },
182 { "GL_EXT_texture_array", o(EXT_texture_array), GL },
183 { "GL_EXT_texture_compression_dxt1", o(EXT_texture_compression_s3tc), GL | ES1 | ES2 },
184 { "GL_EXT_texture_compression_rgtc", o(ARB_texture_compression_rgtc), GL },
185 { "GL_EXT_texture_compression_s3tc", o(EXT_texture_compression_s3tc), GL },
186 { "GL_EXT_texture_cube_map", o(ARB_texture_cube_map), GL },
187 { "GL_EXT_texture_edge_clamp", o(SGIS_texture_edge_clamp), GL },
188 { "GL_EXT_texture_env_add", o(EXT_texture_env_add), GL },
189 { "GL_EXT_texture_env_combine", o(EXT_texture_env_combine), GL },
190 { "GL_EXT_texture_env_dot3", o(EXT_texture_env_dot3), GL },
191 { "GL_EXT_texture_filter_anisotropic", o(EXT_texture_filter_anisotropic), GL | ES1 | ES2 },
192 { "GL_EXT_texture_format_BGRA8888", o(EXT_texture_format_BGRA8888), ES1 | ES2 },
193 { "GL_EXT_texture_integer", o(EXT_texture_integer), GL },
194 { "GL_EXT_texture_lod_bias", o(EXT_texture_lod_bias), GL | ES1 },
195 { "GL_EXT_texture_mirror_clamp", o(EXT_texture_mirror_clamp), GL },
196 { "GL_EXT_texture_object", o(EXT_texture_object), GL },
197 { "GL_EXT_texture", o(EXT_texture), GL },
198 { "GL_EXT_texture_rectangle", o(NV_texture_rectangle), GL },
199 { "GL_EXT_texture_shared_exponent", o(EXT_texture_shared_exponent), GL },
200 { "GL_EXT_texture_sRGB", o(EXT_texture_sRGB), GL },
201 { "GL_EXT_texture_sRGB_decode", o(EXT_texture_sRGB_decode), GL },
202 { "GL_EXT_texture_swizzle", o(EXT_texture_swizzle), GL },
203 { "GL_EXT_texture_type_2_10_10_10_REV", o(dummy_true), ES2 },
204 { "GL_EXT_timer_query", o(EXT_timer_query), GL },
205 { "GL_EXT_transform_feedback", o(EXT_transform_feedback), GL },
206 { "GL_EXT_vertex_array_bgra", o(EXT_vertex_array_bgra), GL },
207 { "GL_EXT_vertex_array", o(EXT_vertex_array), GL },
208 { "GL_EXT_vertex_array_set", o(EXT_vertex_array_set), GL },
209
210 /* OES extensions */
211 { "GL_OES_blend_equation_separate", o(EXT_blend_equation_separate), ES1 },
212 { "GL_OES_blend_func_separate", o(EXT_blend_func_separate), ES1 },
213 { "GL_OES_blend_subtract", o(EXT_blend_subtract), ES1 },
214 { "GL_OES_byte_coordinates", o(dummy_true), ES1 },
215 { "GL_OES_compressed_paletted_texture", o(dummy_false), DISABLE },
216 { "GL_OES_depth24", o(EXT_framebuffer_object), ES1 | ES2 },
217 { "GL_OES_depth32", o(dummy_false), DISABLE },
218 { "GL_OES_depth_texture", o(ARB_depth_texture), ES2 },
219 #if FEATURE_OES_draw_texture
220 { "GL_OES_draw_texture", o(OES_draw_texture), ES1 | ES2 },
221 #endif
222 #if FEATURE_OES_EGL_image
223 /* FIXME: Mesa expects GL_OES_EGL_image to be available in OpenGL contexts. */
224 { "GL_OES_EGL_image", o(OES_EGL_image), GL | ES1 | ES2 },
225 #endif
226 { "GL_OES_element_index_uint", o(EXT_vertex_array), ES1 | ES2 },
227 { "GL_OES_fbo_render_mipmap", o(EXT_framebuffer_object), ES1 | ES2 },
228 { "GL_OES_fixed_point", o(dummy_true), ES1 },
229 { "GL_OES_framebuffer_object", o(EXT_framebuffer_object), ES1 },
230 { "GL_OES_mapbuffer", o(ARB_vertex_buffer_object), ES1 | ES2 },
231 { "GL_OES_matrix_get", o(dummy_true), ES1 },
232 { "GL_OES_packed_depth_stencil", o(EXT_packed_depth_stencil), ES1 | ES2 },
233 { "GL_OES_point_size_array", o(dummy_true), ES1 },
234 { "GL_OES_point_sprite", o(ARB_point_sprite), ES1 },
235 { "GL_OES_query_matrix", o(dummy_true), ES1 },
236 { "GL_OES_read_format", o(OES_read_format), GL | ES1 },
237 { "GL_OES_rgb8_rgba8", o(EXT_framebuffer_object), ES1 | ES2 },
238 { "GL_OES_single_precision", o(dummy_true), ES1 },
239 { "GL_OES_standard_derivatives", o(OES_standard_derivatives), ES2 },
240 { "GL_OES_stencil1", o(dummy_false), DISABLE },
241 { "GL_OES_stencil4", o(dummy_false), DISABLE },
242 { "GL_OES_stencil8", o(EXT_framebuffer_object), ES1 | ES2 },
243 { "GL_OES_stencil_wrap", o(EXT_stencil_wrap), ES1 },
244 { "GL_OES_texture_3D", o(EXT_texture3D), ES2 },
245 { "GL_OES_texture_cube_map", o(ARB_texture_cube_map), ES1 },
246 { "GL_OES_texture_env_crossbar", o(ARB_texture_env_crossbar), ES1 },
247 { "GL_OES_texture_mirrored_repeat", o(ARB_texture_mirrored_repeat), ES1 },
248 { "GL_OES_texture_npot", o(ARB_texture_non_power_of_two), ES2 },
249
250 /* Vendor extensions */
251 { "GL_3DFX_texture_compression_FXT1", o(TDFX_texture_compression_FXT1), GL },
252 { "GL_AMD_conservative_depth", o(AMD_conservative_depth), GL },
253 { "GL_APPLE_client_storage", o(APPLE_client_storage), GL },
254 { "GL_APPLE_object_purgeable", o(APPLE_object_purgeable), GL },
255 { "GL_APPLE_packed_pixels", o(APPLE_packed_pixels), GL },
256 { "GL_APPLE_vertex_array_object", o(APPLE_vertex_array_object), GL },
257 { "GL_ATI_blend_equation_separate", o(EXT_blend_equation_separate), GL },
258 { "GL_ATI_envmap_bumpmap", o(ATI_envmap_bumpmap), GL },
259 { "GL_ATI_fragment_shader", o(ATI_fragment_shader), GL },
260 { "GL_ATI_separate_stencil", o(ATI_separate_stencil), GL },
261 { "GL_ATI_texture_env_combine3", o(ATI_texture_env_combine3), GL },
262 { "GL_ATI_texture_mirror_once", o(ATI_texture_mirror_once), GL },
263 { "GL_IBM_multimode_draw_arrays", o(IBM_multimode_draw_arrays), GL },
264 { "GL_IBM_rasterpos_clip", o(IBM_rasterpos_clip), GL },
265 { "GL_IBM_texture_mirrored_repeat", o(ARB_texture_mirrored_repeat), GL },
266 { "GL_INGR_blend_func_separate", o(EXT_blend_func_separate), GL },
267 { "GL_MESA_pack_invert", o(MESA_pack_invert), GL },
268 { "GL_MESA_resize_buffers", o(MESA_resize_buffers), GL },
269 { "GL_MESA_texture_array", o(MESA_texture_array), GL },
270 { "GL_MESA_texture_signed_rgba", o(MESA_texture_signed_rgba), GL },
271 { "GL_MESA_window_pos", o(ARB_window_pos), GL },
272 { "GL_MESAX_texture_float", o(ARB_texture_float), GL },
273 { "GL_MESA_ycbcr_texture", o(MESA_ycbcr_texture), GL },
274 { "GL_NV_blend_square", o(NV_blend_square), GL },
275 { "GL_NV_conditional_render", o(NV_conditional_render), GL },
276 { "GL_NV_depth_clamp", o(ARB_depth_clamp), GL },
277 { "GL_NV_fragment_program", o(NV_fragment_program), GL },
278 { "GL_NV_fragment_program_option", o(NV_fragment_program_option), GL },
279 { "GL_NV_light_max_exponent", o(NV_light_max_exponent), GL },
280 { "GL_NV_packed_depth_stencil", o(EXT_packed_depth_stencil), GL },
281 { "GL_NV_point_sprite", o(NV_point_sprite), GL },
282 { "GL_NV_primitive_restart", o(NV_primitive_restart), GL },
283 { "GL_NV_texgen_reflection", o(NV_texgen_reflection), GL },
284 { "GL_NV_texture_env_combine4", o(NV_texture_env_combine4), GL },
285 { "GL_NV_texture_rectangle", o(NV_texture_rectangle), GL },
286 { "GL_NV_vertex_program1_1", o(NV_vertex_program1_1), GL },
287 { "GL_NV_vertex_program", o(NV_vertex_program), GL },
288 { "GL_S3_s3tc", o(S3_s3tc), GL },
289 { "GL_SGIS_generate_mipmap", o(SGIS_generate_mipmap), GL },
290 { "GL_SGIS_texture_border_clamp", o(ARB_texture_border_clamp), GL },
291 { "GL_SGIS_texture_edge_clamp", o(SGIS_texture_edge_clamp), GL },
292 { "GL_SGIS_texture_lod", o(SGIS_texture_lod), GL },
293 { "GL_SUN_multi_draw_arrays", o(EXT_multi_draw_arrays), GL },
294
295 { 0, 0, 0 },
296 };
297
298
299 /**
300 * Given an extension name, lookup up the corresponding member of struct
301 * gl_extensions and return that member's offset (in bytes). If the name is
302 * not found in the \c extension_table, return 0.
303 *
304 * \param name Name of extension.
305 * \return Offset of member in struct gl_extensions.
306 */
307 static size_t
308 name_to_offset(const char* name)
309 {
310 const struct extension *i;
311
312 if (name == 0)
313 return 0;
314
315 for (i = extension_table; i->name != 0; ++i) {
316 if (strcmp(name, i->name) == 0)
317 return i->offset;
318 }
319
320 return 0;
321 }
322
323
324 /**
325 * \brief Extensions enabled by default.
326 *
327 * These extensions are enabled by _mesa_init_extensions().
328 *
329 * XXX: Should these defaults also apply to GLES?
330 */
331 static const size_t default_extensions[] = {
332 o(ARB_copy_buffer),
333 o(ARB_draw_buffers),
334 o(ARB_multisample),
335 o(ARB_texture_compression),
336 o(ARB_transpose_matrix),
337 o(ARB_vertex_buffer_object),
338 o(ARB_window_pos),
339
340 o(EXT_abgr),
341 o(EXT_bgra),
342 o(EXT_compiled_vertex_array),
343 o(EXT_copy_texture),
344 o(EXT_draw_range_elements),
345 o(EXT_multi_draw_arrays),
346 o(EXT_packed_pixels),
347 o(EXT_polygon_offset),
348 o(EXT_rescale_normal),
349 o(EXT_separate_specular_color),
350 o(EXT_subtexture),
351 o(EXT_texture),
352 o(EXT_texture3D),
353 o(EXT_texture_object),
354 o(EXT_vertex_array),
355
356 o(OES_read_format),
357 o(OES_standard_derivatives),
358
359 /* Vendor Extensions */
360 o(APPLE_packed_pixels),
361 o(IBM_multimode_draw_arrays),
362 o(IBM_rasterpos_clip),
363 o(NV_light_max_exponent),
364 o(NV_texgen_reflection),
365 o(SGIS_generate_mipmap),
366 o(SGIS_texture_edge_clamp),
367 o(SGIS_texture_lod),
368
369 0,
370 };
371
372
373 /**
374 * Enable all extensions suitable for a software-only renderer.
375 * This is a convenience function used by the XMesa, OSMesa, GGI drivers, etc.
376 */
377 void
378 _mesa_enable_sw_extensions(struct gl_context *ctx)
379 {
380 /*ctx->Extensions.ARB_copy_buffer = GL_TRUE;*/
381 ctx->Extensions.ARB_depth_clamp = GL_TRUE;
382 ctx->Extensions.ARB_depth_texture = GL_TRUE;
383 /*ctx->Extensions.ARB_draw_buffers = GL_TRUE;*/
384 ctx->Extensions.ARB_draw_elements_base_vertex = GL_TRUE;
385 ctx->Extensions.ARB_draw_instanced = GL_TRUE;
386 ctx->Extensions.ARB_explicit_attrib_location = GL_TRUE;
387 ctx->Extensions.ARB_fragment_coord_conventions = GL_TRUE;
388 #if FEATURE_ARB_fragment_program
389 ctx->Extensions.ARB_fragment_program = GL_TRUE;
390 ctx->Extensions.ARB_fragment_program_shadow = GL_TRUE;
391 #endif
392 #if FEATURE_ARB_fragment_shader
393 ctx->Extensions.ARB_fragment_shader = GL_TRUE;
394 #endif
395 #if FEATURE_ARB_framebuffer_object
396 ctx->Extensions.ARB_framebuffer_object = GL_TRUE;
397 #endif
398 #if FEATURE_ARB_geometry_shader4 && 0
399 /* XXX re-enable when GLSL compiler again supports geometry shaders */
400 ctx->Extensions.ARB_geometry_shader4 = GL_TRUE;
401 #endif
402 ctx->Extensions.ARB_half_float_pixel = GL_TRUE;
403 ctx->Extensions.ARB_half_float_vertex = GL_TRUE;
404 ctx->Extensions.ARB_map_buffer_range = GL_TRUE;
405 ctx->Extensions.ARB_multitexture = GL_TRUE;
406 #if FEATURE_queryobj
407 ctx->Extensions.ARB_occlusion_query = GL_TRUE;
408 ctx->Extensions.ARB_occlusion_query2 = GL_TRUE;
409 #endif
410 ctx->Extensions.ARB_point_sprite = GL_TRUE;
411 #if FEATURE_ARB_shader_objects
412 ctx->Extensions.ARB_shader_objects = GL_TRUE;
413 ctx->Extensions.EXT_separate_shader_objects = GL_TRUE;
414 #endif
415 #if FEATURE_ARB_shading_language_100
416 ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
417 #endif
418 ctx->Extensions.ARB_shadow = GL_TRUE;
419 ctx->Extensions.ARB_shadow_ambient = GL_TRUE;
420 ctx->Extensions.ARB_texture_border_clamp = GL_TRUE;
421 ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
422 ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
423 ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
424 ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
425 /*ctx->Extensions.ARB_texture_float = GL_TRUE;*/
426 ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE;
427 ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
428 ctx->Extensions.ARB_texture_rg = GL_TRUE;
429 ctx->Extensions.ARB_texture_compression_rgtc = GL_TRUE;
430 ctx->Extensions.ARB_vertex_array_object = GL_TRUE;
431 #if FEATURE_ARB_vertex_program
432 ctx->Extensions.ARB_vertex_program = GL_TRUE;
433 #endif
434 #if FEATURE_ARB_vertex_shader
435 ctx->Extensions.ARB_vertex_shader = GL_TRUE;
436 #endif
437 #if FEATURE_ARB_vertex_buffer_object
438 /*ctx->Extensions.ARB_vertex_buffer_object = GL_TRUE;*/
439 #endif
440 #if FEATURE_ARB_sync
441 ctx->Extensions.ARB_sync = GL_TRUE;
442 #endif
443 ctx->Extensions.APPLE_vertex_array_object = GL_TRUE;
444 #if FEATURE_APPLE_object_purgeable
445 ctx->Extensions.APPLE_object_purgeable = GL_TRUE;
446 #endif
447 ctx->Extensions.ATI_envmap_bumpmap = GL_TRUE;
448 #if FEATURE_ATI_fragment_shader
449 ctx->Extensions.ATI_fragment_shader = GL_TRUE;
450 #endif
451 ctx->Extensions.ATI_texture_env_combine3 = GL_TRUE;
452 ctx->Extensions.ATI_texture_mirror_once = GL_TRUE;
453 ctx->Extensions.ATI_separate_stencil = GL_TRUE;
454 ctx->Extensions.EXT_blend_color = GL_TRUE;
455 ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
456 ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
457 ctx->Extensions.EXT_blend_logic_op = GL_TRUE;
458 ctx->Extensions.EXT_blend_minmax = GL_TRUE;
459 ctx->Extensions.EXT_blend_subtract = GL_TRUE;
460 ctx->Extensions.EXT_depth_bounds_test = GL_TRUE;
461 ctx->Extensions.EXT_draw_buffers2 = GL_TRUE;
462 ctx->Extensions.EXT_fog_coord = GL_TRUE;
463 #if FEATURE_EXT_framebuffer_object
464 ctx->Extensions.EXT_framebuffer_object = GL_TRUE;
465 #endif
466 #if FEATURE_EXT_framebuffer_blit
467 ctx->Extensions.EXT_framebuffer_blit = GL_TRUE;
468 #endif
469 #if FEATURE_ARB_framebuffer_object
470 ctx->Extensions.EXT_framebuffer_multisample = GL_TRUE;
471 #endif
472 /*ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;*/
473 ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE;
474 ctx->Extensions.EXT_paletted_texture = GL_TRUE;
475 #if FEATURE_EXT_pixel_buffer_object
476 ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
477 #endif
478 ctx->Extensions.EXT_point_parameters = GL_TRUE;
479 ctx->Extensions.EXT_provoking_vertex = GL_TRUE;
480 ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
481 ctx->Extensions.EXT_secondary_color = GL_TRUE;
482 ctx->Extensions.EXT_shared_texture_palette = GL_TRUE;
483 ctx->Extensions.EXT_stencil_wrap = GL_TRUE;
484 ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
485 ctx->Extensions.EXT_texture_array = GL_TRUE;
486 ctx->Extensions.EXT_texture_env_add = GL_TRUE;
487 ctx->Extensions.EXT_texture_env_combine = GL_TRUE;
488 ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
489 ctx->Extensions.EXT_texture_mirror_clamp = GL_TRUE;
490 ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;
491 #if FEATURE_EXT_texture_sRGB
492 ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
493 ctx->Extensions.EXT_texture_sRGB_decode = GL_TRUE;
494 #endif
495 ctx->Extensions.EXT_texture_swizzle = GL_TRUE;
496 #if FEATURE_EXT_transform_feedback
497 /*ctx->Extensions.EXT_transform_feedback = GL_TRUE;*/
498 #endif
499 ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE;
500 /*ctx->Extensions.IBM_multimode_draw_arrays = GL_TRUE;*/
501 ctx->Extensions.MESA_pack_invert = GL_TRUE;
502 ctx->Extensions.MESA_resize_buffers = GL_TRUE;
503 ctx->Extensions.MESA_texture_array = GL_TRUE;
504 ctx->Extensions.MESA_ycbcr_texture = GL_TRUE;
505 ctx->Extensions.NV_blend_square = GL_TRUE;
506 ctx->Extensions.NV_conditional_render = GL_TRUE;
507 /*ctx->Extensions.NV_light_max_exponent = GL_TRUE;*/
508 ctx->Extensions.NV_point_sprite = GL_TRUE;
509 ctx->Extensions.NV_texture_env_combine4 = GL_TRUE;
510 ctx->Extensions.NV_texture_rectangle = GL_TRUE;
511 /*ctx->Extensions.NV_texgen_reflection = GL_TRUE;*/
512 #if FEATURE_NV_vertex_program
513 ctx->Extensions.NV_vertex_program = GL_TRUE;
514 ctx->Extensions.NV_vertex_program1_1 = GL_TRUE;
515 #endif
516 #if FEATURE_NV_fragment_program
517 ctx->Extensions.NV_fragment_program = GL_TRUE;
518 #endif
519 #if FEATURE_NV_fragment_program && FEATURE_ARB_fragment_program
520 ctx->Extensions.NV_fragment_program_option = GL_TRUE;
521 #endif
522 /*ctx->Extensions.SGIS_generate_mipmap = GL_TRUE;*/
523 ctx->Extensions.SGIS_texture_edge_clamp = GL_TRUE;
524 #if FEATURE_ARB_vertex_program || FEATURE_ARB_fragment_program
525 ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE;
526 #endif
527 #if FEATURE_texture_fxt1
528 _mesa_enable_extension(ctx, "GL_3DFX_texture_compression_FXT1");
529 #endif
530 #if FEATURE_texture_s3tc
531 if (ctx->Mesa_DXTn) {
532 _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
533 _mesa_enable_extension(ctx, "GL_S3_s3tc");
534 }
535 #endif
536 }
537
538
539 /**
540 * Enable common EXT extensions in the ARB_imaging subset.
541 */
542 void
543 _mesa_enable_imaging_extensions(struct gl_context *ctx)
544 {
545 ctx->Extensions.EXT_blend_color = GL_TRUE;
546 ctx->Extensions.EXT_blend_logic_op = GL_TRUE;
547 ctx->Extensions.EXT_blend_minmax = GL_TRUE;
548 ctx->Extensions.EXT_blend_subtract = GL_TRUE;
549 }
550
551
552
553 /**
554 * Enable all OpenGL 1.3 features and extensions.
555 * A convenience function to be called by drivers.
556 */
557 void
558 _mesa_enable_1_3_extensions(struct gl_context *ctx)
559 {
560 /*ctx->Extensions.ARB_multisample = GL_TRUE;*/
561 ctx->Extensions.ARB_multitexture = GL_TRUE;
562 ctx->Extensions.ARB_texture_border_clamp = GL_TRUE;
563 /*ctx->Extensions.ARB_texture_compression = GL_TRUE;*/
564 ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
565 ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
566 ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
567 ctx->Extensions.EXT_texture_env_add = GL_TRUE;
568 /*ctx->Extensions.ARB_transpose_matrix = GL_TRUE;*/
569 }
570
571
572
573 /**
574 * Enable all OpenGL 1.4 features and extensions.
575 * A convenience function to be called by drivers.
576 */
577 void
578 _mesa_enable_1_4_extensions(struct gl_context *ctx)
579 {
580 ctx->Extensions.ARB_depth_texture = GL_TRUE;
581 ctx->Extensions.ARB_shadow = GL_TRUE;
582 ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
583 ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE;
584 ctx->Extensions.ARB_window_pos = GL_TRUE;
585 ctx->Extensions.EXT_blend_color = GL_TRUE;
586 ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
587 ctx->Extensions.EXT_blend_minmax = GL_TRUE;
588 ctx->Extensions.EXT_blend_subtract = GL_TRUE;
589 ctx->Extensions.EXT_fog_coord = GL_TRUE;
590 /*ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;*/
591 ctx->Extensions.EXT_point_parameters = GL_TRUE;
592 ctx->Extensions.EXT_secondary_color = GL_TRUE;
593 ctx->Extensions.EXT_stencil_wrap = GL_TRUE;
594 ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;
595 /*ctx->Extensions.SGIS_generate_mipmap = GL_TRUE;*/
596 }
597
598
599 /**
600 * Enable all OpenGL 1.5 features and extensions.
601 * A convenience function to be called by drivers.
602 */
603 void
604 _mesa_enable_1_5_extensions(struct gl_context *ctx)
605 {
606 ctx->Extensions.ARB_occlusion_query = GL_TRUE;
607 /*ctx->Extensions.ARB_vertex_buffer_object = GL_TRUE;*/
608 ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
609 }
610
611
612 /**
613 * Enable all OpenGL 2.0 features and extensions.
614 * A convenience function to be called by drivers.
615 */
616 void
617 _mesa_enable_2_0_extensions(struct gl_context *ctx)
618 {
619 /*ctx->Extensions.ARB_draw_buffers = GL_TRUE;*/
620 #if FEATURE_ARB_fragment_shader
621 ctx->Extensions.ARB_fragment_shader = GL_TRUE;
622 #endif
623 ctx->Extensions.ARB_point_sprite = GL_TRUE;
624 ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
625 ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
626 #if FEATURE_ARB_shader_objects
627 ctx->Extensions.ARB_shader_objects = GL_TRUE;
628 #endif
629 #if FEATURE_ARB_shading_language_100
630 ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
631 #endif
632 ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
633 #if FEATURE_ARB_vertex_shader
634 ctx->Extensions.ARB_vertex_shader = GL_TRUE;
635 #endif
636 }
637
638
639 /**
640 * Enable all OpenGL 2.1 features and extensions.
641 * A convenience function to be called by drivers.
642 */
643 void
644 _mesa_enable_2_1_extensions(struct gl_context *ctx)
645 {
646 #if FEATURE_EXT_pixel_buffer_object
647 ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
648 #endif
649 #if FEATURE_EXT_texture_sRGB
650 ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
651 #endif
652 }
653
654
655 /**
656 * Either enable or disable the named extension.
657 * \return GL_TRUE for success, GL_FALSE if invalid extension name
658 */
659 static GLboolean
660 set_extension( struct gl_context *ctx, const char *name, GLboolean state )
661 {
662 size_t offset;
663
664 if (ctx->Extensions.String) {
665 /* The string was already queried - can't change it now! */
666 _mesa_problem(ctx, "Trying to enable/disable extension after glGetString(GL_EXTENSIONS): %s", name);
667 return GL_FALSE;
668 }
669
670 offset = name_to_offset(name);
671 if (offset == 0) {
672 _mesa_problem(ctx, "Trying to enable/disable unknown extension %s",
673 name);
674 return GL_FALSE;
675 } else if (offset == o(dummy_true) && state == GL_FALSE) {
676 _mesa_problem(ctx, "Trying to disable a permanently enabled extension: "
677 "%s", name);
678 return GL_FALSE;
679 } else {
680 GLboolean *base = (GLboolean *) &ctx->Extensions;
681 base[offset] = state;
682 return GL_TRUE;
683 }
684 }
685
686
687 /**
688 * Enable the named extension.
689 * Typically called by drivers.
690 */
691 void
692 _mesa_enable_extension( struct gl_context *ctx, const char *name )
693 {
694 if (!set_extension(ctx, name, GL_TRUE))
695 _mesa_problem(ctx, "Trying to enable unknown extension: %s", name);
696 }
697
698
699 /**
700 * Disable the named extension.
701 * XXX is this really needed???
702 */
703 void
704 _mesa_disable_extension( struct gl_context *ctx, const char *name )
705 {
706 if (!set_extension(ctx, name, GL_FALSE))
707 _mesa_problem(ctx, "Trying to disable unknown extension: %s", name);
708 }
709
710
711 /**
712 * Test if the named extension is enabled in this context.
713 */
714 GLboolean
715 _mesa_extension_is_enabled( struct gl_context *ctx, const char *name )
716 {
717 size_t offset;
718 GLboolean *base;
719
720 if (name == 0)
721 return GL_FALSE;
722
723 offset = name_to_offset(name);
724 if (offset == 0)
725 return GL_FALSE;
726 base = (GLboolean *) &ctx->Extensions;
727 return base[offset];
728 }
729
730
731 /**
732 * \brief Apply the \c MESA_EXTENSION_OVERRIDE environment variable.
733 *
734 * \c MESA_EXTENSION_OVERRIDE is a space-separated list of extensions to
735 * enable or disable. The list is processed thus:
736 * - Enable recognized extension names that are prefixed with '+'.
737 * - Disable recognized extension names that are prefixed with '-'.
738 * - Enable recognized extension names that are not prefixed.
739 * - Collect unrecognized extension names in a new string.
740 *
741 * \return Space-separated list of unrecognized extension names (which must
742 * be freed). Does not return \c NULL.
743 */
744 static char *
745 get_extension_override( struct gl_context *ctx )
746 {
747 const char *env_const= _mesa_getenv("MESA_EXTENSION_OVERRIDE");
748 char *env;
749 char *ext;
750 char *extra_exts;
751 int len;
752
753 if (env_const == NULL) {
754 /* Return the empty string rather than NULL. This simplifies the logic
755 * of client functions. */
756 return calloc(1, sizeof(char));
757 }
758
759 /* extra_exts: List of unrecognized extensions. */
760 extra_exts = calloc(strlen(env_const), sizeof(char));
761
762 /* Copy env_const because strtok() is destructive. */
763 env = strdup(env_const);
764 for (ext = strtok(env, " "); ext != NULL; ext = strtok(NULL, " ")) {
765 int enable;
766 int recognized;
767 switch (ext[0]) {
768 case '+':
769 enable = 1;
770 ++ext;
771 break;
772 case '-':
773 enable = 0;
774 ++ext;
775 break;
776 default:
777 enable = 1;
778 break;
779 }
780 recognized = set_extension(ctx, ext, enable);
781 if (!recognized) {
782 strcat(extra_exts, ext);
783 strcat(extra_exts, " ");
784 }
785 }
786
787 /* Remove trailing space. */
788 len = strlen(extra_exts);
789 if (extra_exts[len - 1] == ' ')
790 extra_exts[len - 1] = '\0';
791
792 return extra_exts;
793 }
794
795
796 /**
797 * \brief Initialize extension tables and enable default extensions.
798 *
799 * This should be called during context initialization.
800 * Note: Sets gl_extensions.dummy_true to true.
801 */
802 void
803 _mesa_init_extensions( struct gl_context *ctx )
804 {
805 GLboolean *base = (GLboolean *) &ctx->Extensions;
806 GLboolean *sentinel = base + o(extension_sentinel);
807 GLboolean *i;
808 const size_t *j;
809
810 /* First, turn all extensions off. */
811 for (i = base; i != sentinel; ++i)
812 *i = GL_FALSE;
813
814 /* Then, selectively turn default extensions on. */
815 ctx->Extensions.dummy_true = GL_TRUE;
816 for (j = default_extensions; *j != 0; ++j)
817 base[*j] = GL_TRUE;
818 }
819
820
821 /**
822 * Construct the GL_EXTENSIONS string. Called the first time that
823 * glGetString(GL_EXTENSIONS) is called.
824 */
825 GLubyte*
826 _mesa_make_extension_string(struct gl_context *ctx)
827 {
828 /* The extension string. */
829 char *exts = 0;
830 /* Length of extension string. */
831 size_t length = 0;
832 /* String of extra extensions. */
833 char *extra_extensions = get_extension_override(ctx);
834 GLboolean *base = (GLboolean *) &ctx->Extensions;
835 const struct extension *i;
836
837 /* Compute length of the extension string. */
838 for (i = extension_table; i->name != 0; ++i) {
839 if (base[i->offset] && (i->api_set & (1 << ctx->API))) {
840 length += strlen(i->name) + 1; /* +1 for space */
841 }
842 }
843 if (extra_extensions != NULL)
844 length += 1 + strlen(extra_extensions); /* +1 for space */
845
846 exts = (char *) calloc(length + 1, sizeof(char));
847 if (exts == NULL) {
848 free(extra_extensions);
849 return NULL;
850 }
851
852 /* Build the extension string.*/
853 for (i = extension_table; i->name != 0; ++i) {
854 if (base[i->offset] && (i->api_set & (1 << ctx->API))) {
855 strcat(exts, i->name);
856 strcat(exts, " ");
857 }
858 }
859 if (extra_extensions != 0) {
860 strcat(exts, extra_extensions);
861 free(extra_extensions);
862 }
863
864 return (GLubyte *) exts;
865 }
866
867 /**
868 * Return number of enabled extensions.
869 */
870 GLuint
871 _mesa_get_extension_count(struct gl_context *ctx)
872 {
873 GLboolean *base;
874 const struct extension *i;
875
876 /* only count once */
877 if (ctx->Extensions.Count != 0)
878 return ctx->Extensions.Count;
879
880 base = (GLboolean *) &ctx->Extensions;
881 for (i = extension_table; i->name != 0; ++i) {
882 if (base[i->offset]) {
883 ctx->Extensions.Count++;
884 }
885 }
886 return ctx->Extensions.Count;
887 }
888
889 /**
890 * Return name of i-th enabled extension
891 */
892 const GLubyte *
893 _mesa_get_enabled_extension(struct gl_context *ctx, GLuint index)
894 {
895 const GLboolean *base;
896 size_t n;
897 const struct extension *i;
898
899 if (index < 0)
900 return NULL;
901
902 base = (GLboolean*) &ctx->Extensions;
903 n = 0;
904 for (i = extension_table; i->name != 0; ++i) {
905 if (n == index && base[i->offset]) {
906 return (GLubyte*) i->name;
907 } else if (base[i->offset]) {
908 ++n;
909 }
910 }
911
912 return NULL;
913 }