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