projects / mesa.git / blob
? search:


7d15e3a50fb80dd699170298ecafa07572189e56
[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 is disabled due to missing GLSL support. */
245 { "GL_OES_texture_3D", o(EXT_texture3D), DISABLE },
246 { "GL_OES_texture_cube_map", o(ARB_texture_cube_map), ES1 },
247 { "GL_OES_texture_env_crossbar", o(ARB_texture_env_crossbar), ES1 },
248 { "GL_OES_texture_mirrored_repeat", o(ARB_texture_mirrored_repeat), ES1 },
249 { "GL_OES_texture_npot", o(ARB_texture_non_power_of_two), ES2 },
250
251 /* Vendor extensions */
252 { "GL_3DFX_texture_compression_FXT1", o(TDFX_texture_compression_FXT1), 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_SGI_texture_color_table", o(SGI_texture_color_table), GL },
294 { "GL_SUN_multi_draw_arrays", o(EXT_multi_draw_arrays), GL },
295
296 { 0, 0, 0 },
297 };
298
299
300 /**
301 * Given an extension name, lookup up the corresponding member of struct
302 * gl_extensions and return that member's offset (in bytes). If the name is
303 * not found in the \c extension_table, return 0.
304 *
305 * \param name Name of extension.
306 * \return Offset of member in struct gl_extensions.
307 */
308 static size_t
309 name_to_offset(const char* name)
310 {
311 const struct extension *i;
312
313 if (name == 0)
314 return 0;
315
316 for (i = extension_table; i->name != 0; ++i) {
317 if (strcmp(name, i->name) == 0)
318 return i->offset;
319 }
320
321 return 0;
322 }
323
324
325 /**
326 * \brief Extensions enabled by default.
327 *
328 * These extensions are enabled by _mesa_init_extensions().
329 *
330 * XXX: Should these defaults also apply to GLES?
331 */
332 static const size_t default_extensions[] = {
333 o(ARB_copy_buffer),
334 o(ARB_draw_buffers),
335 o(ARB_multisample),
336 o(ARB_texture_compression),
337 o(ARB_transpose_matrix),
338 o(ARB_vertex_buffer_object),
339 o(ARB_window_pos),
340
341 o(EXT_abgr),
342 o(EXT_bgra),
343 o(EXT_compiled_vertex_array),
344 o(EXT_copy_texture),
345 o(EXT_draw_range_elements),
346 o(EXT_multi_draw_arrays),
347 o(EXT_packed_pixels),
348 o(EXT_polygon_offset),
349 o(EXT_rescale_normal),
350 o(EXT_separate_specular_color),
351 o(EXT_subtexture),
352 o(EXT_texture),
353 o(EXT_texture3D),
354 o(EXT_texture_object),
355 o(EXT_vertex_array),
356
357 o(OES_read_format),
358 o(OES_standard_derivatives),
359
360 /* Vendor Extensions */
361 o(APPLE_packed_pixels),
362 o(IBM_multimode_draw_arrays),
363 o(IBM_rasterpos_clip),
364 o(NV_light_max_exponent),
365 o(NV_texgen_reflection),
366 o(SGIS_generate_mipmap),
367 o(SGIS_texture_edge_clamp),
368 o(SGIS_texture_lod),
369
370 0,
371 };
372
373
374 /**
375 * Enable all extensions suitable for a software-only renderer.
376 * This is a convenience function used by the XMesa, OSMesa, GGI drivers, etc.
377 */
378 void
379 _mesa_enable_sw_extensions(struct gl_context *ctx)
380 {
381 /*ctx->Extensions.ARB_copy_buffer = GL_TRUE;*/
382 ctx->Extensions.ARB_depth_clamp = GL_TRUE;
383 ctx->Extensions.ARB_depth_texture = GL_TRUE;
384 /*ctx->Extensions.ARB_draw_buffers = GL_TRUE;*/
385 ctx->Extensions.ARB_draw_elements_base_vertex = GL_TRUE;
386 ctx->Extensions.ARB_draw_instanced = GL_TRUE;
387 ctx->Extensions.ARB_explicit_attrib_location = GL_TRUE;
388 ctx->Extensions.ARB_fragment_coord_conventions = GL_TRUE;
389 #if FEATURE_ARB_fragment_program
390 ctx->Extensions.ARB_fragment_program = GL_TRUE;
391 ctx->Extensions.ARB_fragment_program_shadow = GL_TRUE;
392 #endif
393 #if FEATURE_ARB_fragment_shader
394 ctx->Extensions.ARB_fragment_shader = GL_TRUE;
395 #endif
396 #if FEATURE_ARB_framebuffer_object
397 ctx->Extensions.ARB_framebuffer_object = GL_TRUE;
398 #endif
399 #if FEATURE_ARB_geometry_shader4 && 0
400 /* XXX re-enable when GLSL compiler again supports geometry shaders */
401 ctx->Extensions.ARB_geometry_shader4 = GL_TRUE;
402 #endif
403 ctx->Extensions.ARB_half_float_pixel = GL_TRUE;
404 ctx->Extensions.ARB_half_float_vertex = GL_TRUE;
405 ctx->Extensions.ARB_map_buffer_range = GL_TRUE;
406 ctx->Extensions.ARB_multitexture = GL_TRUE;
407 #if FEATURE_queryobj
408 ctx->Extensions.ARB_occlusion_query = GL_TRUE;
409 ctx->Extensions.ARB_occlusion_query2 = GL_TRUE;
410 #endif
411 ctx->Extensions.ARB_point_sprite = GL_TRUE;
412 #if FEATURE_ARB_shader_objects
413 ctx->Extensions.ARB_shader_objects = GL_TRUE;
414 ctx->Extensions.EXT_separate_shader_objects = GL_TRUE;
415 #endif
416 #if FEATURE_ARB_shading_language_100
417 ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
418 #endif
419 ctx->Extensions.ARB_shadow = GL_TRUE;
420 ctx->Extensions.ARB_shadow_ambient = GL_TRUE;
421 ctx->Extensions.ARB_texture_border_clamp = GL_TRUE;
422 ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
423 ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
424 ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
425 ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
426 /*ctx->Extensions.ARB_texture_float = GL_TRUE;*/
427 ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE;
428 ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
429 ctx->Extensions.ARB_texture_rg = 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.SGI_texture_color_table = GL_TRUE;
523 /*ctx->Extensions.SGIS_generate_mipmap = GL_TRUE;*/
524 ctx->Extensions.SGIS_texture_edge_clamp = GL_TRUE;
525 #if FEATURE_ARB_vertex_program || FEATURE_ARB_fragment_program
526 ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE;
527 #endif
528 #if FEATURE_texture_fxt1
529 _mesa_enable_extension(ctx, "GL_3DFX_texture_compression_FXT1");
530 #endif
531 #if FEATURE_texture_s3tc
532 if (ctx->Mesa_DXTn) {
533 _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
534 _mesa_enable_extension(ctx, "GL_S3_s3tc");
535 }
536 #endif
537 }
538
539
540 /**
541 * Enable common EXT extensions in the ARB_imaging subset.
542 */
543 void
544 _mesa_enable_imaging_extensions(struct gl_context *ctx)
545 {
546 ctx->Extensions.EXT_blend_color = GL_TRUE;
547 ctx->Extensions.EXT_blend_logic_op = GL_TRUE;
548 ctx->Extensions.EXT_blend_minmax = GL_TRUE;
549 ctx->Extensions.EXT_blend_subtract = GL_TRUE;
550 }
551
552
553
554 /**
555 * Enable all OpenGL 1.3 features and extensions.
556 * A convenience function to be called by drivers.
557 */
558 void
559 _mesa_enable_1_3_extensions(struct gl_context *ctx)
560 {
561 /*ctx->Extensions.ARB_multisample = GL_TRUE;*/
562 ctx->Extensions.ARB_multitexture = GL_TRUE;
563 ctx->Extensions.ARB_texture_border_clamp = GL_TRUE;
564 /*ctx->Extensions.ARB_texture_compression = GL_TRUE;*/
565 ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
566 ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
567 ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
568 ctx->Extensions.EXT_texture_env_add = GL_TRUE;
569 /*ctx->Extensions.ARB_transpose_matrix = GL_TRUE;*/
570 }
571
572
573
574 /**
575 * Enable all OpenGL 1.4 features and extensions.
576 * A convenience function to be called by drivers.
577 */
578 void
579 _mesa_enable_1_4_extensions(struct gl_context *ctx)
580 {
581 ctx->Extensions.ARB_depth_texture = GL_TRUE;
582 ctx->Extensions.ARB_shadow = GL_TRUE;
583 ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
584 ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE;
585 ctx->Extensions.ARB_window_pos = GL_TRUE;
586 ctx->Extensions.EXT_blend_color = GL_TRUE;
587 ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
588 ctx->Extensions.EXT_blend_minmax = GL_TRUE;
589 ctx->Extensions.EXT_blend_subtract = GL_TRUE;
590 ctx->Extensions.EXT_fog_coord = GL_TRUE;
591 /*ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;*/
592 ctx->Extensions.EXT_point_parameters = GL_TRUE;
593 ctx->Extensions.EXT_secondary_color = GL_TRUE;
594 ctx->Extensions.EXT_stencil_wrap = GL_TRUE;
595 ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;
596 /*ctx->Extensions.SGIS_generate_mipmap = GL_TRUE;*/
597 }
598
599
600 /**
601 * Enable all OpenGL 1.5 features and extensions.
602 * A convenience function to be called by drivers.
603 */
604 void
605 _mesa_enable_1_5_extensions(struct gl_context *ctx)
606 {
607 ctx->Extensions.ARB_occlusion_query = GL_TRUE;
608 /*ctx->Extensions.ARB_vertex_buffer_object = GL_TRUE;*/
609 ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
610 }
611
612
613 /**
614 * Enable all OpenGL 2.0 features and extensions.
615 * A convenience function to be called by drivers.
616 */
617 void
618 _mesa_enable_2_0_extensions(struct gl_context *ctx)
619 {
620 /*ctx->Extensions.ARB_draw_buffers = GL_TRUE;*/
621 #if FEATURE_ARB_fragment_shader
622 ctx->Extensions.ARB_fragment_shader = GL_TRUE;
623 #endif
624 ctx->Extensions.ARB_point_sprite = GL_TRUE;
625 ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
626 ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
627 #if FEATURE_ARB_shader_objects
628 ctx->Extensions.ARB_shader_objects = GL_TRUE;
629 #endif
630 #if FEATURE_ARB_shading_language_100
631 ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
632 #endif
633 ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
634 #if FEATURE_ARB_vertex_shader
635 ctx->Extensions.ARB_vertex_shader = GL_TRUE;
636 #endif
637 }
638
639
640 /**
641 * Enable all OpenGL 2.1 features and extensions.
642 * A convenience function to be called by drivers.
643 */
644 void
645 _mesa_enable_2_1_extensions(struct gl_context *ctx)
646 {
647 #if FEATURE_EXT_pixel_buffer_object
648 ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
649 #endif
650 #if FEATURE_EXT_texture_sRGB
651 ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
652 #endif
653 }
654
655
656 /**
657 * Either enable or disable the named extension.
658 * \return GL_TRUE for success, GL_FALSE if invalid extension name
659 */
660 static GLboolean
661 set_extension( struct gl_context *ctx, const char *name, GLboolean state )
662 {
663 size_t offset;
664
665 if (ctx->Extensions.String) {
666 /* The string was already queried - can't change it now! */
667 _mesa_problem(ctx, "Trying to enable/disable extension after glGetString(GL_EXTENSIONS): %s", name);
668 return GL_FALSE;
669 }
670
671 offset = name_to_offset(name);
672 if (offset == 0) {
673 _mesa_problem(ctx, "Trying to enable/disable unknown extension %s",
674 name);
675 return GL_FALSE;
676 } else if (offset == o(dummy_true) && state == GL_FALSE) {
677 _mesa_problem(ctx, "Trying to disable a permanently enabled extension: "
678 "%s", name);
679 return GL_FALSE;
680 } else {
681 GLboolean *base = (GLboolean *) &ctx->Extensions;
682 base[offset] = state;
683 return GL_TRUE;
684 }
685 }
686
687
688 /**
689 * Enable the named extension.
690 * Typically called by drivers.
691 */
692 void
693 _mesa_enable_extension( struct gl_context *ctx, const char *name )
694 {
695 if (!set_extension(ctx, name, GL_TRUE))
696 _mesa_problem(ctx, "Trying to enable unknown extension: %s", name);
697 }
698
699
700 /**
701 * Disable the named extension.
702 * XXX is this really needed???
703 */
704 void
705 _mesa_disable_extension( struct gl_context *ctx, const char *name )
706 {
707 if (!set_extension(ctx, name, GL_FALSE))
708 _mesa_problem(ctx, "Trying to disable unknown extension: %s", name);
709 }
710
711
712 /**
713 * Test if the named extension is enabled in this context.
714 */
715 GLboolean
716 _mesa_extension_is_enabled( struct gl_context *ctx, const char *name )
717 {
718 size_t offset;
719 GLboolean *base;
720
721 if (name == 0)
722 return GL_FALSE;
723
724 offset = name_to_offset(name);
725 if (offset == 0)
726 return GL_FALSE;
727 base = (GLboolean *) &ctx->Extensions;
728 return base[offset];
729 }
730
731
732 /**
733 * Append string 'b' onto string 'a'. Free 'a' and return new string.
734 */
735 static char *
736 append(const char *a, const char *b)
737 {
738 const GLuint aLen = a ? strlen(a) : 0;
739 const GLuint bLen = b ? strlen(b) : 0;
740 char *s = calloc(1, aLen + bLen + 1);
741 if (s) {
742 if (a)
743 memcpy(s, a, aLen);
744 if (b)
745 memcpy(s + aLen, b, bLen);
746 s[aLen + bLen] = '\0';
747 }
748 if (a)
749 free((void *) a);
750 return s;
751 }
752
753
754 /**
755 * Check the MESA_EXTENSION_OVERRIDE env var.
756 * For extension names that are recognized, turn them on. For extension
757 * names that are recognized and prefixed with '-', turn them off.
758 * Return a string of the unknown/leftover names.
759 *
760 * Returnd string needs to be freed.
761 */
762 static char *
763 get_extension_override( struct gl_context *ctx )
764 {
765 const char *envExt = _mesa_getenv("MESA_EXTENSION_OVERRIDE");
766 char *extraExt = NULL;
767 char ext[1000];
768 GLuint extLen = 0;
769 GLuint i;
770 GLboolean disableExt = GL_FALSE;
771
772 if (!envExt)
773 return NULL;
774
775 for (i = 0; ; i++) {
776 if (envExt[i] == '\0' || envExt[i] == ' ') {
777 /* terminate/process 'ext' if extLen > 0 */
778 if (extLen > 0) {
779 assert(extLen < sizeof(ext));
780 /* enable extension named by 'ext' */
781 ext[extLen] = 0;
782 if (!set_extension(ctx, ext, !disableExt)) {
783 /* unknown extension name, append it to extraExt */
784 if (extraExt) {
785 extraExt = append(extraExt, " ");
786 }
787 extraExt = append(extraExt, ext);
788 }
789 extLen = 0;
790 disableExt = GL_FALSE;
791 }
792 if (envExt[i] == '\0')
793 break;
794 }
795 else if (envExt[i] == '-') {
796 disableExt = GL_TRUE;
797 }
798 else {
799 /* accumulate this non-space character */
800 ext[extLen++] = envExt[i];
801 }
802 }
803
804 return extraExt;
805 }
806
807
808 /**
809 * \brief Initialize extension tables and enable default extensions.
810 *
811 * This should be called during context initialization.
812 * Note: Sets gl_extensions.dummy_true to true.
813 */
814 void
815 _mesa_init_extensions( struct gl_context *ctx )
816 {
817 GLboolean *base = (GLboolean *) &ctx->Extensions;
818 GLboolean *sentinel = base + o(extension_sentinel);
819 GLboolean *i;
820 const size_t *j;
821
822 /* First, turn all extensions off. */
823 for (i = base; i != sentinel; ++i)
824 *i = GL_FALSE;
825
826 /* Then, selectively turn default extensions on. */
827 ctx->Extensions.dummy_true = GL_TRUE;
828 for (j = default_extensions; *j != 0; ++j)
829 base[*j] = GL_TRUE;
830 }
831
832
833 /**
834 * Construct the GL_EXTENSIONS string. Called the first time that
835 * glGetString(GL_EXTENSIONS) is called.
836 */
837 GLubyte*
838 _mesa_make_extension_string(struct gl_context *ctx)
839 {
840 /* The extension string. */
841 char *exts = 0;
842 /* Length of extension string. */
843 size_t length = 0;
844 /* String of extra extensions. */
845 char *extra_extensions = get_extension_override(ctx);
846 GLboolean *base = (GLboolean *) &ctx->Extensions;
847 const struct extension *i;
848
849 /* Compute length of the extension string. */
850 for (i = extension_table; i->name != 0; ++i) {
851 if (base[i->offset] && (i->api_set & (1 << ctx->API))) {
852 length += strlen(i->name) + 1; /* +1 for space */
853 }
854 }
855 if (extra_extensions != NULL)
856 length += 1 + strlen(extra_extensions); /* +1 for space */
857
858 exts = (char *) calloc(length + 1, sizeof(char));
859 if (exts == NULL) {
860 free(extra_extensions);
861 return NULL;
862 }
863
864 /* Build the extension string.*/
865 for (i = extension_table; i->name != 0; ++i) {
866 if (base[i->offset] && (i->api_set & (1 << ctx->API))) {
867 strcat(exts, i->name);
868 strcat(exts, " ");
869 }
870 }
871 if (extra_extensions != 0) {
872 strcat(exts, extra_extensions);
873 free(extra_extensions);
874 }
875
876 return (GLubyte *) exts;
877 }
878
879 /**
880 * Return number of enabled extensions.
881 */
882 GLuint
883 _mesa_get_extension_count(struct gl_context *ctx)
884 {
885 GLboolean *base;
886 const struct extension *i;
887
888 /* only count once */
889 if (ctx->Extensions.Count != 0)
890 return ctx->Extensions.Count;
891
892 base = (GLboolean *) &ctx->Extensions;
893 for (i = extension_table; i->name != 0; ++i) {
894 if (base[i->offset]) {
895 ctx->Extensions.Count++;
896 }
897 }
898 return ctx->Extensions.Count;
899 }
900
901 /**
902 * Return name of i-th enabled extension
903 */
904 const GLubyte *
905 _mesa_get_enabled_extension(struct gl_context *ctx, GLuint index)
906 {
907 const GLboolean *base;
908 size_t n;
909 const struct extension *i;
910
911 if (index < 0)
912 return NULL;
913
914 base = (GLboolean*) &ctx->Extensions;
915 n = 0;
916 for (i = extension_table; i->name != 0; ++i) {
917 if (n == index && base[i->offset]) {
918 return (GLubyte*) i->name;
919 } else if (base[i->offset]) {
920 ++n;
921 }
922 }
923
924 return NULL;
925 }