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mesa: begin implementation of GL_ARB_draw_buffers_blend
[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_half_float_pixel", o(ARB_half_float_pixel), GL },
93 { "GL_ARB_half_float_vertex", o(ARB_half_float_vertex), GL },
94 { "GL_ARB_instanced_arrays", o(ARB_instanced_arrays), GL },
95 { "GL_ARB_map_buffer_range", o(ARB_map_buffer_range), GL },
96 { "GL_ARB_multisample", o(ARB_multisample), GL },
97 { "GL_ARB_multitexture", o(ARB_multitexture), GL },
98 { "GL_ARB_occlusion_query2", o(ARB_occlusion_query2), GL },
99 { "GL_ARB_occlusion_query", o(ARB_occlusion_query), GL },
100 { "GL_ARB_pixel_buffer_object", o(EXT_pixel_buffer_object), GL },
101 { "GL_ARB_point_parameters", o(EXT_point_parameters), GL },
102 { "GL_ARB_point_sprite", o(ARB_point_sprite), GL },
103 { "GL_ARB_provoking_vertex", o(EXT_provoking_vertex), GL },
104 { "GL_ARB_sampler_objects", o(ARB_sampler_objects), GL },
105 { "GL_ARB_seamless_cube_map", o(ARB_seamless_cube_map), GL },
106 { "GL_ARB_shader_objects", o(ARB_shader_objects), GL },
107 { "GL_ARB_shader_stencil_export", o(ARB_shader_stencil_export), GL },
108 { "GL_ARB_shading_language_100", o(ARB_shading_language_100), GL },
109 { "GL_ARB_shadow_ambient", o(ARB_shadow_ambient), GL },
110 { "GL_ARB_shadow", o(ARB_shadow), GL },
111 { "GL_ARB_sync", o(ARB_sync), GL },
112 { "GL_ARB_texture_border_clamp", o(ARB_texture_border_clamp), GL },
113 { "GL_ARB_texture_buffer_object", o(ARB_texture_buffer_object), GL },
114 { "GL_ARB_texture_compression", o(ARB_texture_compression), GL },
115 { "GL_ARB_texture_compression_rgtc", o(ARB_texture_compression_rgtc), GL },
116 { "GL_ARB_texture_cube_map", o(ARB_texture_cube_map), GL },
117 { "GL_ARB_texture_env_add", o(EXT_texture_env_add), GL },
118 { "GL_ARB_texture_env_combine", o(ARB_texture_env_combine), GL },
119 { "GL_ARB_texture_env_crossbar", o(ARB_texture_env_crossbar), GL },
120 { "GL_ARB_texture_env_dot3", o(ARB_texture_env_dot3), GL },
121 { "GL_ARB_texture_mirrored_repeat", o(ARB_texture_mirrored_repeat), GL },
122 { "GL_ARB_texture_multisample", o(ARB_texture_multisample), GL },
123 { "GL_ARB_texture_non_power_of_two", o(ARB_texture_non_power_of_two), GL },
124 { "GL_ARB_texture_rectangle", o(NV_texture_rectangle), GL },
125 { "GL_ARB_texture_rgb10_a2ui", o(ARB_texture_rgb10_a2ui), GL },
126 { "GL_ARB_texture_rg", o(ARB_texture_rg), GL },
127 { "GL_ARB_texture_swizzle", o(EXT_texture_swizzle), GL },
128 { "GL_ARB_transform_feedback2", o(ARB_transform_feedback2), GL },
129 { "GL_ARB_transpose_matrix", o(ARB_transpose_matrix), GL },
130 { "GL_ARB_uniform_buffer_object", o(ARB_uniform_buffer_object), GL },
131 { "GL_ARB_vertex_array_bgra", o(EXT_vertex_array_bgra), GL },
132 { "GL_ARB_vertex_array_object", o(ARB_vertex_array_object), GL },
133 { "GL_ARB_vertex_buffer_object", o(ARB_vertex_buffer_object), GL },
134 { "GL_ARB_vertex_program", o(ARB_vertex_program), GL },
135 { "GL_ARB_vertex_shader", o(ARB_vertex_shader), GL },
136 { "GL_ARB_vertex_type_2_10_10_10_rev", o(ARB_vertex_type_2_10_10_10_rev), GL },
137 { "GL_ARB_window_pos", o(ARB_window_pos), GL },
138
139 /* EXT extensions */
140 { "GL_EXT_abgr", o(EXT_abgr), GL },
141 { "GL_EXT_bgra", o(EXT_bgra), GL },
142 { "GL_EXT_blend_color", o(EXT_blend_color), GL },
143 { "GL_EXT_blend_equation_separate", o(EXT_blend_equation_separate), GL },
144 { "GL_EXT_blend_func_separate", o(EXT_blend_func_separate), GL },
145 { "GL_EXT_blend_logic_op", o(EXT_blend_logic_op), GL },
146 { "GL_EXT_blend_minmax", o(EXT_blend_minmax), GL | ES1 | ES2 },
147 { "GL_EXT_blend_subtract", o(EXT_blend_subtract), GL },
148 { "GL_EXT_clip_volume_hint", o(EXT_clip_volume_hint), GL },
149 { "GL_EXT_compiled_vertex_array", o(EXT_compiled_vertex_array), GL },
150 { "GL_EXT_copy_texture", o(EXT_copy_texture), GL },
151 { "GL_EXT_depth_bounds_test", o(EXT_depth_bounds_test), GL },
152 { "GL_EXT_draw_buffers2", o(EXT_draw_buffers2), GL },
153 { "GL_EXT_draw_instanced", o(ARB_draw_instanced), GL },
154 { "GL_EXT_draw_range_elements", o(EXT_draw_range_elements), GL },
155 { "GL_EXT_fog_coord", o(EXT_fog_coord), GL },
156 { "GL_EXT_framebuffer_blit", o(EXT_framebuffer_blit), GL },
157 { "GL_EXT_framebuffer_multisample", o(EXT_framebuffer_multisample), GL },
158 { "GL_EXT_framebuffer_object", o(EXT_framebuffer_object), GL },
159 { "GL_EXT_framebuffer_sRGB", o(EXT_framebuffer_sRGB), GL },
160 { "GL_EXT_gpu_program_parameters", o(EXT_gpu_program_parameters), GL },
161 { "GL_EXT_gpu_shader4", o(EXT_gpu_shader4), GL },
162 { "GL_EXT_multi_draw_arrays", o(EXT_multi_draw_arrays), GL | ES1 | ES2 },
163 { "GL_EXT_packed_depth_stencil", o(EXT_packed_depth_stencil), GL },
164 { "GL_EXT_packed_float", o(EXT_packed_float), GL },
165 { "GL_EXT_packed_pixels", o(EXT_packed_pixels), GL },
166 { "GL_EXT_paletted_texture", o(EXT_paletted_texture), GL },
167 { "GL_EXT_pixel_buffer_object", o(EXT_pixel_buffer_object), GL },
168 { "GL_EXT_point_parameters", o(EXT_point_parameters), GL },
169 { "GL_EXT_polygon_offset", o(EXT_polygon_offset), GL },
170 { "GL_EXT_provoking_vertex", o(EXT_provoking_vertex), GL },
171 { "GL_EXT_rescale_normal", o(EXT_rescale_normal), GL },
172 { "GL_EXT_secondary_color", o(EXT_secondary_color), GL },
173 { "GL_EXT_separate_shader_objects", o(EXT_separate_shader_objects), GL },
174 { "GL_EXT_separate_specular_color", o(EXT_separate_specular_color), GL },
175 { "GL_EXT_shadow_funcs", o(EXT_shadow_funcs), GL },
176 { "GL_EXT_shared_texture_palette", o(EXT_shared_texture_palette), GL },
177 { "GL_EXT_stencil_two_side", o(EXT_stencil_two_side), GL },
178 { "GL_EXT_stencil_wrap", o(EXT_stencil_wrap), GL },
179 { "GL_EXT_subtexture", o(EXT_subtexture), GL },
180 { "GL_EXT_texture3D", o(EXT_texture3D), GL },
181 { "GL_EXT_texture_array", o(EXT_texture_array), GL },
182 { "GL_EXT_texture_compression_dxt1", o(EXT_texture_compression_s3tc), GL | ES1 | ES2 },
183 { "GL_EXT_texture_compression_rgtc", o(ARB_texture_compression_rgtc), GL },
184 { "GL_EXT_texture_compression_s3tc", o(EXT_texture_compression_s3tc), GL },
185 { "GL_EXT_texture_cube_map", o(ARB_texture_cube_map), GL },
186 { "GL_EXT_texture_edge_clamp", o(SGIS_texture_edge_clamp), GL },
187 { "GL_EXT_texture_env_add", o(EXT_texture_env_add), GL },
188 { "GL_EXT_texture_env_combine", o(EXT_texture_env_combine), GL },
189 { "GL_EXT_texture_env_dot3", o(EXT_texture_env_dot3), GL },
190 { "GL_EXT_texture_filter_anisotropic", o(EXT_texture_filter_anisotropic), GL | ES1 | ES2 },
191 { "GL_EXT_texture_format_BGRA8888", o(EXT_texture_format_BGRA8888), ES1 | ES2 },
192 { "GL_EXT_texture_integer", o(EXT_texture_integer), GL },
193 { "GL_EXT_texture_lod_bias", o(EXT_texture_lod_bias), GL | ES1 },
194 { "GL_EXT_texture_mirror_clamp", o(EXT_texture_mirror_clamp), GL },
195 { "GL_EXT_texture_object", o(EXT_texture_object), GL },
196 { "GL_EXT_texture", o(EXT_texture), GL },
197 { "GL_EXT_texture_rectangle", o(NV_texture_rectangle), GL },
198 { "GL_EXT_texture_shared_exponent", o(EXT_texture_shared_exponent), GL },
199 { "GL_EXT_texture_sRGB", o(EXT_texture_sRGB), GL },
200 { "GL_EXT_texture_swizzle", o(EXT_texture_swizzle), GL },
201 { "GL_EXT_texture_type_2_10_10_10_REV", o(dummy_true), ES2 },
202 { "GL_EXT_timer_query", o(EXT_timer_query), GL },
203 { "GL_EXT_transform_feedback", o(EXT_transform_feedback), GL },
204 { "GL_EXT_vertex_array_bgra", o(EXT_vertex_array_bgra), GL },
205 { "GL_EXT_vertex_array", o(EXT_vertex_array), GL },
206 { "GL_EXT_vertex_array_set", o(EXT_vertex_array_set), GL },
207
208 /* OES extensions */
209 { "GL_OES_blend_equation_separate", o(EXT_blend_equation_separate), ES1 },
210 { "GL_OES_blend_func_separate", o(EXT_blend_func_separate), ES1 },
211 { "GL_OES_blend_subtract", o(EXT_blend_subtract), ES1 },
212 { "GL_OES_byte_coordinates", o(dummy_true), ES1 },
213 { "GL_OES_compressed_paletted_texture", o(dummy_false), DISABLE },
214 { "GL_OES_depth24", o(EXT_framebuffer_object), ES1 | ES2 },
215 { "GL_OES_depth32", o(dummy_false), DISABLE },
216 { "GL_OES_depth_texture", o(ARB_depth_texture), ES2 },
217 #if FEATURE_OES_draw_texture
218 { "GL_OES_draw_texture", o(OES_draw_texture), ES1 | ES2 },
219 #endif
220 #if FEATURE_OES_EGL_image
221 /* FIXME: Mesa expects GL_OES_EGL_image to be available in OpenGL contexts. */
222 { "GL_OES_EGL_image", o(OES_EGL_image), GL | ES1 | ES2 },
223 #endif
224 { "GL_OES_element_index_uint", o(EXT_vertex_array), ES1 | ES2 },
225 { "GL_OES_fbo_render_mipmap", o(EXT_framebuffer_object), ES1 | ES2 },
226 { "GL_OES_fixed_point", o(dummy_true), ES1 },
227 { "GL_OES_framebuffer_object", o(EXT_framebuffer_object), ES1 },
228 { "GL_OES_mapbuffer", o(ARB_vertex_buffer_object), ES1 | ES2 },
229 { "GL_OES_matrix_get", o(dummy_true), ES1 },
230 { "GL_OES_packed_depth_stencil", o(EXT_packed_depth_stencil), ES1 | ES2 },
231 { "GL_OES_point_size_array", o(dummy_true), ES1 },
232 { "GL_OES_point_sprite", o(ARB_point_sprite), ES1 },
233 { "GL_OES_query_matrix", o(dummy_true), ES1 },
234 { "GL_OES_read_format", o(OES_read_format), GL | ES1 },
235 { "GL_OES_rgb8_rgba8", o(EXT_framebuffer_object), ES1 | ES2 },
236 { "GL_OES_single_precision", o(dummy_true), ES1 },
237 { "GL_OES_standard_derivatives", o(OES_standard_derivatives), ES2 },
238 { "GL_OES_stencil1", o(dummy_false), DISABLE },
239 { "GL_OES_stencil4", o(dummy_false), DISABLE },
240 { "GL_OES_stencil8", o(EXT_framebuffer_object), ES1 | ES2 },
241 { "GL_OES_stencil_wrap", o(EXT_stencil_wrap), ES1 },
242 /* GL_OES_texture_3D is disabled due to missing GLSL support. */
243 { "GL_OES_texture_3D", o(EXT_texture3D), DISABLE },
244 { "GL_OES_texture_cube_map", o(ARB_texture_cube_map), ES1 },
245 { "GL_OES_texture_env_crossbar", o(ARB_texture_env_crossbar), ES1 },
246 { "GL_OES_texture_mirrored_repeat", o(ARB_texture_mirrored_repeat), ES1 },
247 { "GL_OES_texture_npot", o(ARB_texture_non_power_of_two), ES2 },
248
249 /* Vendor extensions */
250 { "GL_3DFX_texture_compression_FXT1", o(TDFX_texture_compression_FXT1), GL },
251 { "GL_APPLE_client_storage", o(APPLE_client_storage), GL },
252 { "GL_APPLE_object_purgeable", o(APPLE_object_purgeable), GL },
253 { "GL_APPLE_packed_pixels", o(APPLE_packed_pixels), GL },
254 { "GL_APPLE_vertex_array_object", o(APPLE_vertex_array_object), GL },
255 { "GL_ATI_blend_equation_separate", o(EXT_blend_equation_separate), GL },
256 { "GL_ATI_envmap_bumpmap", o(ATI_envmap_bumpmap), GL },
257 { "GL_ATI_fragment_shader", o(ATI_fragment_shader), GL },
258 { "GL_ATI_separate_stencil", o(ATI_separate_stencil), GL },
259 { "GL_ATI_texture_env_combine3", o(ATI_texture_env_combine3), GL },
260 { "GL_ATI_texture_mirror_once", o(ATI_texture_mirror_once), GL },
261 { "GL_IBM_multimode_draw_arrays", o(IBM_multimode_draw_arrays), GL },
262 { "GL_IBM_rasterpos_clip", o(IBM_rasterpos_clip), GL },
263 { "GL_IBM_texture_mirrored_repeat", o(ARB_texture_mirrored_repeat), GL },
264 { "GL_INGR_blend_func_separate", o(EXT_blend_func_separate), GL },
265 { "GL_MESA_pack_invert", o(MESA_pack_invert), GL },
266 { "GL_MESA_resize_buffers", o(MESA_resize_buffers), GL },
267 { "GL_MESA_texture_array", o(MESA_texture_array), GL },
268 { "GL_MESA_texture_signed_rgba", o(MESA_texture_signed_rgba), GL },
269 { "GL_MESA_window_pos", o(ARB_window_pos), GL },
270 { "GL_MESAX_texture_float", o(ARB_texture_float), GL },
271 { "GL_MESA_ycbcr_texture", o(MESA_ycbcr_texture), GL },
272 { "GL_NV_blend_square", o(NV_blend_square), GL },
273 { "GL_NV_conditional_render", o(NV_conditional_render), GL },
274 { "GL_NV_depth_clamp", o(ARB_depth_clamp), GL },
275 { "GL_NV_fragment_program", o(NV_fragment_program), GL },
276 { "GL_NV_fragment_program_option", o(NV_fragment_program_option), GL },
277 { "GL_NV_light_max_exponent", o(NV_light_max_exponent), GL },
278 { "GL_NV_packed_depth_stencil", o(EXT_packed_depth_stencil), GL },
279 { "GL_NV_point_sprite", o(NV_point_sprite), GL },
280 { "GL_NV_primitive_restart", o(NV_primitive_restart), GL },
281 { "GL_NV_texgen_reflection", o(NV_texgen_reflection), GL },
282 { "GL_NV_texture_env_combine4", o(NV_texture_env_combine4), GL },
283 { "GL_NV_texture_rectangle", o(NV_texture_rectangle), GL },
284 { "GL_NV_vertex_program1_1", o(NV_vertex_program1_1), GL },
285 { "GL_NV_vertex_program", o(NV_vertex_program), GL },
286 { "GL_S3_s3tc", o(S3_s3tc), GL },
287 { "GL_SGIS_generate_mipmap", o(SGIS_generate_mipmap), GL },
288 { "GL_SGIS_texture_border_clamp", o(ARB_texture_border_clamp), GL },
289 { "GL_SGIS_texture_edge_clamp", o(SGIS_texture_edge_clamp), GL },
290 { "GL_SGIS_texture_lod", o(SGIS_texture_lod), GL },
291 { "GL_SGI_texture_color_table", o(SGI_texture_color_table), GL },
292 { "GL_SUN_multi_draw_arrays", o(EXT_multi_draw_arrays), GL },
293
294 { 0, 0, 0 },
295 };
296
297
298 /**
299 * Given an extension name, lookup up the corresponding member of struct
300 * gl_extensions and return that member's offset (in bytes). If the name is
301 * not found in the \c extension_table, return 0.
302 *
303 * \param name Name of extension.
304 * \return Offset of member in struct gl_extensions.
305 */
306 static size_t
307 name_to_offset(const char* name)
308 {
309 const struct extension *i;
310
311 if (name == 0)
312 return 0;
313
314 for (i = extension_table; i->name != 0; ++i) {
315 if (strcmp(name, i->name) == 0)
316 return i->offset;
317 }
318
319 return 0;
320 }
321
322
323 /**
324 * \brief Extensions enabled by default.
325 *
326 * These extensions are enabled by _mesa_init_extensions().
327 *
328 * XXX: Should these defaults also apply to GLES?
329 */
330 static const size_t default_extensions[] = {
331 o(ARB_copy_buffer),
332 o(ARB_draw_buffers),
333 o(ARB_multisample),
334 o(ARB_texture_compression),
335 o(ARB_transpose_matrix),
336 o(ARB_vertex_buffer_object),
337 o(ARB_window_pos),
338
339 o(EXT_abgr),
340 o(EXT_bgra),
341 o(EXT_compiled_vertex_array),
342 o(EXT_copy_texture),
343 o(EXT_draw_range_elements),
344 o(EXT_multi_draw_arrays),
345 o(EXT_packed_pixels),
346 o(EXT_polygon_offset),
347 o(EXT_rescale_normal),
348 o(EXT_separate_specular_color),
349 o(EXT_subtexture),
350 o(EXT_texture),
351 o(EXT_texture3D),
352 o(EXT_texture_object),
353 o(EXT_vertex_array),
354
355 o(OES_read_format),
356 o(OES_standard_derivatives),
357
358 /* Vendor Extensions */
359 o(APPLE_packed_pixels),
360 o(IBM_multimode_draw_arrays),
361 o(IBM_rasterpos_clip),
362 o(NV_light_max_exponent),
363 o(NV_texgen_reflection),
364 o(SGIS_generate_mipmap),
365 o(SGIS_texture_edge_clamp),
366 o(SGIS_texture_lod),
367
368 0,
369 };
370
371
372 /**
373 * Enable all extensions suitable for a software-only renderer.
374 * This is a convenience function used by the XMesa, OSMesa, GGI drivers, etc.
375 */
376 void
377 _mesa_enable_sw_extensions(struct gl_context *ctx)
378 {
379 /*ctx->Extensions.ARB_copy_buffer = GL_TRUE;*/
380 ctx->Extensions.ARB_depth_clamp = GL_TRUE;
381 ctx->Extensions.ARB_depth_texture = GL_TRUE;
382 /*ctx->Extensions.ARB_draw_buffers = GL_TRUE;*/
383 ctx->Extensions.ARB_draw_elements_base_vertex = GL_TRUE;
384 ctx->Extensions.ARB_draw_instanced = GL_TRUE;
385 ctx->Extensions.ARB_explicit_attrib_location = GL_TRUE;
386 ctx->Extensions.ARB_fragment_coord_conventions = GL_TRUE;
387 #if FEATURE_ARB_fragment_program
388 ctx->Extensions.ARB_fragment_program = GL_TRUE;
389 ctx->Extensions.ARB_fragment_program_shadow = GL_TRUE;
390 #endif
391 #if FEATURE_ARB_fragment_shader
392 ctx->Extensions.ARB_fragment_shader = GL_TRUE;
393 #endif
394 #if FEATURE_ARB_framebuffer_object
395 ctx->Extensions.ARB_framebuffer_object = GL_TRUE;
396 #endif
397 #if FEATURE_ARB_geometry_shader4 && 0
398 /* XXX re-enable when GLSL compiler again supports geometry shaders */
399 ctx->Extensions.ARB_geometry_shader4 = GL_TRUE;
400 #endif
401 ctx->Extensions.ARB_half_float_pixel = GL_TRUE;
402 ctx->Extensions.ARB_half_float_vertex = GL_TRUE;
403 ctx->Extensions.ARB_map_buffer_range = GL_TRUE;
404 ctx->Extensions.ARB_multitexture = GL_TRUE;
405 #if FEATURE_queryobj
406 ctx->Extensions.ARB_occlusion_query = GL_TRUE;
407 ctx->Extensions.ARB_occlusion_query2 = GL_TRUE;
408 #endif
409 ctx->Extensions.ARB_point_sprite = GL_TRUE;
410 #if FEATURE_ARB_shader_objects
411 ctx->Extensions.ARB_shader_objects = GL_TRUE;
412 ctx->Extensions.EXT_separate_shader_objects = GL_TRUE;
413 #endif
414 #if FEATURE_ARB_shading_language_100
415 ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
416 #endif
417 ctx->Extensions.ARB_shadow = GL_TRUE;
418 ctx->Extensions.ARB_shadow_ambient = GL_TRUE;
419 ctx->Extensions.ARB_texture_border_clamp = GL_TRUE;
420 ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
421 ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
422 ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
423 ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
424 /*ctx->Extensions.ARB_texture_float = GL_TRUE;*/
425 ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE;
426 ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
427 ctx->Extensions.ARB_texture_rg = GL_TRUE;
428 ctx->Extensions.ARB_vertex_array_object = GL_TRUE;
429 #if FEATURE_ARB_vertex_program
430 ctx->Extensions.ARB_vertex_program = GL_TRUE;
431 #endif
432 #if FEATURE_ARB_vertex_shader
433 ctx->Extensions.ARB_vertex_shader = GL_TRUE;
434 #endif
435 #if FEATURE_ARB_vertex_buffer_object
436 /*ctx->Extensions.ARB_vertex_buffer_object = GL_TRUE;*/
437 #endif
438 #if FEATURE_ARB_sync
439 ctx->Extensions.ARB_sync = GL_TRUE;
440 #endif
441 ctx->Extensions.APPLE_vertex_array_object = GL_TRUE;
442 #if FEATURE_APPLE_object_purgeable
443 ctx->Extensions.APPLE_object_purgeable = GL_TRUE;
444 #endif
445 ctx->Extensions.ATI_envmap_bumpmap = GL_TRUE;
446 #if FEATURE_ATI_fragment_shader
447 ctx->Extensions.ATI_fragment_shader = GL_TRUE;
448 #endif
449 ctx->Extensions.ATI_texture_env_combine3 = GL_TRUE;
450 ctx->Extensions.ATI_texture_mirror_once = GL_TRUE;
451 ctx->Extensions.ATI_separate_stencil = GL_TRUE;
452 ctx->Extensions.EXT_blend_color = GL_TRUE;
453 ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
454 ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
455 ctx->Extensions.EXT_blend_logic_op = GL_TRUE;
456 ctx->Extensions.EXT_blend_minmax = GL_TRUE;
457 ctx->Extensions.EXT_blend_subtract = GL_TRUE;
458 ctx->Extensions.EXT_depth_bounds_test = GL_TRUE;
459 ctx->Extensions.EXT_draw_buffers2 = GL_TRUE;
460 ctx->Extensions.EXT_fog_coord = GL_TRUE;
461 #if FEATURE_EXT_framebuffer_object
462 ctx->Extensions.EXT_framebuffer_object = GL_TRUE;
463 #endif
464 #if FEATURE_EXT_framebuffer_blit
465 ctx->Extensions.EXT_framebuffer_blit = GL_TRUE;
466 #endif
467 #if FEATURE_ARB_framebuffer_object
468 ctx->Extensions.EXT_framebuffer_multisample = GL_TRUE;
469 #endif
470 /*ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;*/
471 ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE;
472 ctx->Extensions.EXT_paletted_texture = GL_TRUE;
473 #if FEATURE_EXT_pixel_buffer_object
474 ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
475 #endif
476 ctx->Extensions.EXT_point_parameters = GL_TRUE;
477 ctx->Extensions.EXT_provoking_vertex = GL_TRUE;
478 ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
479 ctx->Extensions.EXT_secondary_color = GL_TRUE;
480 ctx->Extensions.EXT_shared_texture_palette = GL_TRUE;
481 ctx->Extensions.EXT_stencil_wrap = GL_TRUE;
482 ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
483 ctx->Extensions.EXT_texture_array = GL_TRUE;
484 ctx->Extensions.EXT_texture_env_add = GL_TRUE;
485 ctx->Extensions.EXT_texture_env_combine = GL_TRUE;
486 ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
487 ctx->Extensions.EXT_texture_mirror_clamp = GL_TRUE;
488 ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;
489 #if FEATURE_EXT_texture_sRGB
490 ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
491 #endif
492 ctx->Extensions.EXT_texture_swizzle = GL_TRUE;
493 #if FEATURE_EXT_transform_feedback
494 /*ctx->Extensions.EXT_transform_feedback = GL_TRUE;*/
495 #endif
496 ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE;
497 /*ctx->Extensions.IBM_multimode_draw_arrays = GL_TRUE;*/
498 ctx->Extensions.MESA_pack_invert = GL_TRUE;
499 ctx->Extensions.MESA_resize_buffers = GL_TRUE;
500 ctx->Extensions.MESA_texture_array = GL_TRUE;
501 ctx->Extensions.MESA_ycbcr_texture = GL_TRUE;
502 ctx->Extensions.NV_blend_square = GL_TRUE;
503 ctx->Extensions.NV_conditional_render = GL_TRUE;
504 /*ctx->Extensions.NV_light_max_exponent = GL_TRUE;*/
505 ctx->Extensions.NV_point_sprite = GL_TRUE;
506 ctx->Extensions.NV_texture_env_combine4 = GL_TRUE;
507 ctx->Extensions.NV_texture_rectangle = GL_TRUE;
508 /*ctx->Extensions.NV_texgen_reflection = GL_TRUE;*/
509 #if FEATURE_NV_vertex_program
510 ctx->Extensions.NV_vertex_program = GL_TRUE;
511 ctx->Extensions.NV_vertex_program1_1 = GL_TRUE;
512 #endif
513 #if FEATURE_NV_fragment_program
514 ctx->Extensions.NV_fragment_program = GL_TRUE;
515 #endif
516 #if FEATURE_NV_fragment_program && FEATURE_ARB_fragment_program
517 ctx->Extensions.NV_fragment_program_option = GL_TRUE;
518 #endif
519 ctx->Extensions.SGI_texture_color_table = GL_TRUE;
520 /*ctx->Extensions.SGIS_generate_mipmap = GL_TRUE;*/
521 ctx->Extensions.SGIS_texture_edge_clamp = GL_TRUE;
522 #if FEATURE_ARB_vertex_program || FEATURE_ARB_fragment_program
523 ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE;
524 #endif
525 #if FEATURE_texture_fxt1
526 _mesa_enable_extension(ctx, "GL_3DFX_texture_compression_FXT1");
527 #endif
528 #if FEATURE_texture_s3tc
529 if (ctx->Mesa_DXTn) {
530 _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
531 _mesa_enable_extension(ctx, "GL_S3_s3tc");
532 }
533 #endif
534 }
535
536
537 /**
538 * Enable common EXT extensions in the ARB_imaging subset.
539 */
540 void
541 _mesa_enable_imaging_extensions(struct gl_context *ctx)
542 {
543 ctx->Extensions.EXT_blend_color = GL_TRUE;
544 ctx->Extensions.EXT_blend_logic_op = GL_TRUE;
545 ctx->Extensions.EXT_blend_minmax = GL_TRUE;
546 ctx->Extensions.EXT_blend_subtract = GL_TRUE;
547 }
548
549
550
551 /**
552 * Enable all OpenGL 1.3 features and extensions.
553 * A convenience function to be called by drivers.
554 */
555 void
556 _mesa_enable_1_3_extensions(struct gl_context *ctx)
557 {
558 /*ctx->Extensions.ARB_multisample = GL_TRUE;*/
559 ctx->Extensions.ARB_multitexture = GL_TRUE;
560 ctx->Extensions.ARB_texture_border_clamp = GL_TRUE;
561 /*ctx->Extensions.ARB_texture_compression = GL_TRUE;*/
562 ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
563 ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
564 ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
565 ctx->Extensions.EXT_texture_env_add = GL_TRUE;
566 /*ctx->Extensions.ARB_transpose_matrix = GL_TRUE;*/
567 }
568
569
570
571 /**
572 * Enable all OpenGL 1.4 features and extensions.
573 * A convenience function to be called by drivers.
574 */
575 void
576 _mesa_enable_1_4_extensions(struct gl_context *ctx)
577 {
578 ctx->Extensions.ARB_depth_texture = GL_TRUE;
579 ctx->Extensions.ARB_shadow = GL_TRUE;
580 ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
581 ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE;
582 ctx->Extensions.ARB_window_pos = GL_TRUE;
583 ctx->Extensions.EXT_blend_color = GL_TRUE;
584 ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
585 ctx->Extensions.EXT_blend_minmax = GL_TRUE;
586 ctx->Extensions.EXT_blend_subtract = GL_TRUE;
587 ctx->Extensions.EXT_fog_coord = GL_TRUE;
588 /*ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;*/
589 ctx->Extensions.EXT_point_parameters = GL_TRUE;
590 ctx->Extensions.EXT_secondary_color = GL_TRUE;
591 ctx->Extensions.EXT_stencil_wrap = GL_TRUE;
592 ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;
593 /*ctx->Extensions.SGIS_generate_mipmap = GL_TRUE;*/
594 }
595
596
597 /**
598 * Enable all OpenGL 1.5 features and extensions.
599 * A convenience function to be called by drivers.
600 */
601 void
602 _mesa_enable_1_5_extensions(struct gl_context *ctx)
603 {
604 ctx->Extensions.ARB_occlusion_query = GL_TRUE;
605 /*ctx->Extensions.ARB_vertex_buffer_object = GL_TRUE;*/
606 ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
607 }
608
609
610 /**
611 * Enable all OpenGL 2.0 features and extensions.
612 * A convenience function to be called by drivers.
613 */
614 void
615 _mesa_enable_2_0_extensions(struct gl_context *ctx)
616 {
617 /*ctx->Extensions.ARB_draw_buffers = GL_TRUE;*/
618 #if FEATURE_ARB_fragment_shader
619 ctx->Extensions.ARB_fragment_shader = GL_TRUE;
620 #endif
621 ctx->Extensions.ARB_point_sprite = GL_TRUE;
622 ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
623 ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
624 #if FEATURE_ARB_shader_objects
625 ctx->Extensions.ARB_shader_objects = GL_TRUE;
626 #endif
627 #if FEATURE_ARB_shading_language_100
628 ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
629 #endif
630 ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
631 #if FEATURE_ARB_vertex_shader
632 ctx->Extensions.ARB_vertex_shader = GL_TRUE;
633 #endif
634 }
635
636
637 /**
638 * Enable all OpenGL 2.1 features and extensions.
639 * A convenience function to be called by drivers.
640 */
641 void
642 _mesa_enable_2_1_extensions(struct gl_context *ctx)
643 {
644 #if FEATURE_EXT_pixel_buffer_object
645 ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
646 #endif
647 #if FEATURE_EXT_texture_sRGB
648 ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
649 #endif
650 }
651
652
653 /**
654 * Either enable or disable the named extension.
655 * \return GL_TRUE for success, GL_FALSE if invalid extension name
656 */
657 static GLboolean
658 set_extension( struct gl_context *ctx, const char *name, GLboolean state )
659 {
660 size_t offset;
661
662 if (ctx->Extensions.String) {
663 /* The string was already queried - can't change it now! */
664 _mesa_problem(ctx, "Trying to enable/disable extension after glGetString(GL_EXTENSIONS): %s", name);
665 return GL_FALSE;
666 }
667
668 offset = name_to_offset(name);
669 if (offset == 0) {
670 _mesa_problem(ctx, "Trying to enable/disable unknown extension %s",
671 name);
672 return GL_FALSE;
673 } else if (offset == o(dummy_true) && state == GL_FALSE) {
674 _mesa_problem(ctx, "Trying to disable a permanently enabled extension: "
675 "%s", name);
676 return GL_FALSE;
677 } else {
678 GLboolean *base = (GLboolean *) &ctx->Extensions;
679 base[offset] = state;
680 return GL_TRUE;
681 }
682 }
683
684
685 /**
686 * Enable the named extension.
687 * Typically called by drivers.
688 */
689 void
690 _mesa_enable_extension( struct gl_context *ctx, const char *name )
691 {
692 if (!set_extension(ctx, name, GL_TRUE))
693 _mesa_problem(ctx, "Trying to enable unknown extension: %s", name);
694 }
695
696
697 /**
698 * Disable the named extension.
699 * XXX is this really needed???
700 */
701 void
702 _mesa_disable_extension( struct gl_context *ctx, const char *name )
703 {
704 if (!set_extension(ctx, name, GL_FALSE))
705 _mesa_problem(ctx, "Trying to disable unknown extension: %s", name);
706 }
707
708
709 /**
710 * Test if the named extension is enabled in this context.
711 */
712 GLboolean
713 _mesa_extension_is_enabled( struct gl_context *ctx, const char *name )
714 {
715 size_t offset;
716 GLboolean *base;
717
718 if (name == 0)
719 return GL_FALSE;
720
721 offset = name_to_offset(name);
722 if (offset == 0)
723 return GL_FALSE;
724 base = (GLboolean *) &ctx->Extensions;
725 return base[offset];
726 }
727
728
729 /**
730 * Append string 'b' onto string 'a'. Free 'a' and return new string.
731 */
732 static char *
733 append(const char *a, const char *b)
734 {
735 const GLuint aLen = a ? strlen(a) : 0;
736 const GLuint bLen = b ? strlen(b) : 0;
737 char *s = calloc(1, aLen + bLen + 1);
738 if (s) {
739 if (a)
740 memcpy(s, a, aLen);
741 if (b)
742 memcpy(s + aLen, b, bLen);
743 s[aLen + bLen] = '\0';
744 }
745 if (a)
746 free((void *) a);
747 return s;
748 }
749
750
751 /**
752 * Check the MESA_EXTENSION_OVERRIDE env var.
753 * For extension names that are recognized, turn them on. For extension
754 * names that are recognized and prefixed with '-', turn them off.
755 * Return a string of the unknown/leftover names.
756 *
757 * Returnd string needs to be freed.
758 */
759 static char *
760 get_extension_override( struct gl_context *ctx )
761 {
762 const char *envExt = _mesa_getenv("MESA_EXTENSION_OVERRIDE");
763 char *extraExt = NULL;
764 char ext[1000];
765 GLuint extLen = 0;
766 GLuint i;
767 GLboolean disableExt = GL_FALSE;
768
769 if (!envExt)
770 return NULL;
771
772 for (i = 0; ; i++) {
773 if (envExt[i] == '\0' || envExt[i] == ' ') {
774 /* terminate/process 'ext' if extLen > 0 */
775 if (extLen > 0) {
776 assert(extLen < sizeof(ext));
777 /* enable extension named by 'ext' */
778 ext[extLen] = 0;
779 if (!set_extension(ctx, ext, !disableExt)) {
780 /* unknown extension name, append it to extraExt */
781 if (extraExt) {
782 extraExt = append(extraExt, " ");
783 }
784 extraExt = append(extraExt, ext);
785 }
786 extLen = 0;
787 disableExt = GL_FALSE;
788 }
789 if (envExt[i] == '\0')
790 break;
791 }
792 else if (envExt[i] == '-') {
793 disableExt = GL_TRUE;
794 }
795 else {
796 /* accumulate this non-space character */
797 ext[extLen++] = envExt[i];
798 }
799 }
800
801 return extraExt;
802 }
803
804
805 /**
806 * \brief Initialize extension tables and enable default extensions.
807 *
808 * This should be called during context initialization.
809 * Note: Sets gl_extensions.dummy_true to true.
810 */
811 void
812 _mesa_init_extensions( struct gl_context *ctx )
813 {
814 GLboolean *base = (GLboolean *) &ctx->Extensions;
815 GLboolean *sentinel = base + o(extension_sentinel);
816 GLboolean *i;
817 const size_t *j;
818
819 /* First, turn all extensions off. */
820 for (i = base; i != sentinel; ++i)
821 *i = GL_FALSE;
822
823 /* Then, selectively turn default extensions on. */
824 ctx->Extensions.dummy_true = GL_TRUE;
825 for (j = default_extensions; *j != 0; ++j)
826 base[*j] = GL_TRUE;
827 }
828
829
830 /**
831 * Construct the GL_EXTENSIONS string. Called the first time that
832 * glGetString(GL_EXTENSIONS) is called.
833 */
834 GLubyte*
835 _mesa_make_extension_string(struct gl_context *ctx)
836 {
837 /* The extension string. */
838 char *exts = 0;
839 /* Length of extension string. */
840 size_t length = 0;
841 /* String of extra extensions. */
842 char *extra_extensions = get_extension_override(ctx);
843 GLboolean *base = (GLboolean *) &ctx->Extensions;
844 const struct extension *i;
845
846 /* Compute length of the extension string. */
847 for (i = extension_table; i->name != 0; ++i) {
848 if (base[i->offset] && (i->api_set & (1 << ctx->API))) {
849 length += strlen(i->name) + 1; /* +1 for space */
850 }
851 }
852 if (extra_extensions != NULL)
853 length += 1 + strlen(extra_extensions); /* +1 for space */
854
855 exts = (char *) calloc(length + 1, sizeof(char));
856 if (exts == NULL) {
857 free(extra_extensions);
858 return NULL;
859 }
860
861 /* Build the extension string.*/
862 for (i = extension_table; i->name != 0; ++i) {
863 if (base[i->offset] && (i->api_set & (1 << ctx->API))) {
864 strcat(exts, i->name);
865 strcat(exts, " ");
866 }
867 }
868 if (extra_extensions != 0) {
869 strcat(exts, extra_extensions);
870 free(extra_extensions);
871 }
872
873 return (GLubyte *) exts;
874 }
875
876 /**
877 * Return number of enabled extensions.
878 */
879 GLuint
880 _mesa_get_extension_count(struct gl_context *ctx)
881 {
882 GLboolean *base;
883 const struct extension *i;
884
885 /* only count once */
886 if (ctx->Extensions.Count != 0)
887 return ctx->Extensions.Count;
888
889 base = (GLboolean *) &ctx->Extensions;
890 for (i = extension_table; i->name != 0; ++i) {
891 if (base[i->offset]) {
892 ctx->Extensions.Count++;
893 }
894 }
895 return ctx->Extensions.Count;
896 }
897
898 /**
899 * Return name of i-th enabled extension
900 */
901 const GLubyte *
902 _mesa_get_enabled_extension(struct gl_context *ctx, GLuint index)
903 {
904 const GLboolean *base;
905 size_t n;
906 const struct extension *i;
907
908 if (index < 0)
909 return NULL;
910
911 base = (GLboolean*) &ctx->Extensions;
912 n = 0;
913 for (i = extension_table; i->name != 0; ++i) {
914 if (n == index && base[i->offset]) {
915 return (GLubyte*) i->name;
916 } else if (base[i->offset]) {
917 ++n;
918 }
919 }
920
921 return NULL;
922 }