2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
6 * Copyright (C) 2009 VMware, Inc. All Rights Reserved.
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:
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
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.
29 * \brief Extension handling
36 #include "extensions.h"
37 #include "mfeatures.h"
43 ES1
= 1 << API_OPENGLES
,
44 ES2
= 1 << API_OPENGLES2
,
48 * \brief An element of the \c extension_table.
51 /** Name of extension, such as "GL_ARB_depth_clamp". */
54 /** Offset (in bytes) of the corresponding member in struct gl_extensions. */
57 /** Set of API's in which the extension exists, as a bitset. */
60 /** Year the extension was proposed or approved. Used to sort the
61 * extension string chronologically. */
67 * Given a member \c x of struct gl_extensions, return offset of
70 #define o(x) offsetof(struct gl_extensions, x)
74 * \brief Table of supported OpenGL extensions for all API's.
76 * Note: The GL_MESAX_* extensions are placeholders for future ARB extensions.
78 static const struct extension extension_table
[] = {
80 { "GL_ARB_ES2_compatibility", o(ARB_ES2_compatibility
), GL
, 2009 },
81 { "GL_ARB_blend_func_extended", o(ARB_blend_func_extended
), GL
, 2009 },
82 { "GL_ARB_color_buffer_float", o(ARB_color_buffer_float
), GL
, 2004 },
83 { "GL_ARB_copy_buffer", o(ARB_copy_buffer
), GL
, 2008 },
84 { "GL_ARB_depth_buffer_float", o(ARB_depth_buffer_float
), GL
, 2008 },
85 { "GL_ARB_depth_clamp", o(ARB_depth_clamp
), GL
, 2003 },
86 { "GL_ARB_depth_texture", o(ARB_depth_texture
), GL
, 2001 },
87 { "GL_ARB_draw_buffers", o(ARB_draw_buffers
), GL
, 2002 },
88 { "GL_ARB_draw_buffers_blend", o(ARB_draw_buffers_blend
), GL
, 2009 },
89 { "GL_ARB_draw_elements_base_vertex", o(ARB_draw_elements_base_vertex
), GL
, 2009 },
90 { "GL_ARB_draw_instanced", o(ARB_draw_instanced
), GL
, 2008 },
91 { "GL_ARB_explicit_attrib_location", o(ARB_explicit_attrib_location
), GL
, 2009 },
92 { "GL_ARB_fragment_coord_conventions", o(ARB_fragment_coord_conventions
), GL
, 2009 },
93 { "GL_ARB_fragment_program", o(ARB_fragment_program
), GL
, 2002 },
94 { "GL_ARB_fragment_program_shadow", o(ARB_fragment_program_shadow
), GL
, 2003 },
95 { "GL_ARB_fragment_shader", o(ARB_fragment_shader
), GL
, 2002 },
96 { "GL_ARB_framebuffer_object", o(ARB_framebuffer_object
), GL
, 2005 },
97 { "GL_ARB_framebuffer_sRGB", o(EXT_framebuffer_sRGB
), GL
, 1998 },
98 { "GL_ARB_half_float_pixel", o(ARB_half_float_pixel
), GL
, 2003 },
99 { "GL_ARB_half_float_vertex", o(ARB_half_float_vertex
), GL
, 2008 },
100 { "GL_ARB_instanced_arrays", o(ARB_instanced_arrays
), GL
, 2008 },
101 { "GL_ARB_map_buffer_range", o(ARB_map_buffer_range
), GL
, 2008 },
102 { "GL_ARB_multisample", o(ARB_multisample
), GL
, 1994 },
103 { "GL_ARB_multitexture", o(ARB_multitexture
), GL
, 1998 },
104 { "GL_ARB_occlusion_query2", o(ARB_occlusion_query2
), GL
, 2003 },
105 { "GL_ARB_occlusion_query", o(ARB_occlusion_query
), GL
, 2001 },
106 { "GL_ARB_pixel_buffer_object", o(EXT_pixel_buffer_object
), GL
, 2004 },
107 { "GL_ARB_point_parameters", o(EXT_point_parameters
), GL
, 1997 },
108 { "GL_ARB_point_sprite", o(ARB_point_sprite
), GL
, 2003 },
109 { "GL_ARB_provoking_vertex", o(EXT_provoking_vertex
), GL
, 2009 },
110 { "GL_ARB_robustness", o(dummy_true
), GL
, 2010 },
111 { "GL_ARB_sampler_objects", o(ARB_sampler_objects
), GL
, 2009 },
112 { "GL_ARB_seamless_cube_map", o(ARB_seamless_cube_map
), GL
, 2009 },
113 { "GL_ARB_shader_objects", o(ARB_shader_objects
), GL
, 2002 },
114 { "GL_ARB_shader_stencil_export", o(ARB_shader_stencil_export
), GL
, 2009 },
115 { "GL_ARB_shading_language_100", o(ARB_shading_language_100
), GL
, 2003 },
116 { "GL_ARB_shadow_ambient", o(ARB_shadow_ambient
), GL
, 2001 },
117 { "GL_ARB_shadow", o(ARB_shadow
), GL
, 2001 },
118 { "GL_ARB_sync", o(ARB_sync
), GL
, 2003 },
119 { "GL_ARB_texture_border_clamp", o(ARB_texture_border_clamp
), GL
, 2000 },
120 { "GL_ARB_texture_buffer_object", o(ARB_texture_buffer_object
), GL
, 2008 },
121 { "GL_ARB_texture_compression", o(ARB_texture_compression
), GL
, 2000 },
122 { "GL_ARB_texture_compression_rgtc", o(ARB_texture_compression_rgtc
), GL
, 2004 },
123 { "GL_ARB_texture_cube_map", o(ARB_texture_cube_map
), GL
, 1999 },
124 { "GL_ARB_texture_env_add", o(EXT_texture_env_add
), GL
, 1999 },
125 { "GL_ARB_texture_env_combine", o(ARB_texture_env_combine
), GL
, 2001 },
126 { "GL_ARB_texture_env_crossbar", o(ARB_texture_env_crossbar
), GL
, 2001 },
127 { "GL_ARB_texture_env_dot3", o(ARB_texture_env_dot3
), GL
, 2001 },
128 { "GL_ARB_texture_float", o(ARB_texture_float
), GL
, 2004 },
129 { "GL_ARB_texture_mirrored_repeat", o(ARB_texture_mirrored_repeat
), GL
, 2001 },
130 { "GL_ARB_texture_multisample", o(ARB_texture_multisample
), GL
, 2009 },
131 { "GL_ARB_texture_non_power_of_two", o(ARB_texture_non_power_of_two
), GL
, 2003 },
132 { "GL_ARB_texture_rectangle", o(NV_texture_rectangle
), GL
, 2004 },
133 { "GL_ARB_texture_rgb10_a2ui", o(ARB_texture_rgb10_a2ui
), GL
, 2009 },
134 { "GL_ARB_texture_rg", o(ARB_texture_rg
), GL
, 2008 },
135 { "GL_ARB_texture_swizzle", o(EXT_texture_swizzle
), GL
, 2008 },
136 { "GL_ARB_transform_feedback2", o(ARB_transform_feedback2
), GL
, 2010 },
137 { "GL_ARB_transpose_matrix", o(ARB_transpose_matrix
), GL
, 1999 },
138 { "GL_ARB_uniform_buffer_object", o(ARB_uniform_buffer_object
), GL
, 2002 },
139 { "GL_ARB_vertex_array_bgra", o(EXT_vertex_array_bgra
), GL
, 2008 },
140 { "GL_ARB_vertex_array_object", o(ARB_vertex_array_object
), GL
, 2006 },
141 { "GL_ARB_vertex_buffer_object", o(ARB_vertex_buffer_object
), GL
, 2003 },
142 { "GL_ARB_vertex_program", o(ARB_vertex_program
), GL
, 2002 },
143 { "GL_ARB_vertex_shader", o(ARB_vertex_shader
), GL
, 2002 },
144 { "GL_ARB_vertex_type_2_10_10_10_rev", o(ARB_vertex_type_2_10_10_10_rev
), GL
, 2009 },
145 { "GL_ARB_window_pos", o(ARB_window_pos
), GL
, 2001 },
148 { "GL_EXT_abgr", o(EXT_abgr
), GL
, 1995 },
149 { "GL_EXT_bgra", o(EXT_bgra
), GL
, 1995 },
150 { "GL_EXT_blend_color", o(EXT_blend_color
), GL
, 1995 },
151 { "GL_EXT_blend_equation_separate", o(EXT_blend_equation_separate
), GL
, 2003 },
152 { "GL_EXT_blend_func_separate", o(EXT_blend_func_separate
), GL
, 1999 },
153 { "GL_EXT_blend_logic_op", o(EXT_blend_logic_op
), GL
, 1995 },
154 { "GL_EXT_blend_minmax", o(EXT_blend_minmax
), GL
| ES1
| ES2
, 1995 },
155 { "GL_EXT_blend_subtract", o(EXT_blend_subtract
), GL
, 1995 },
156 { "GL_EXT_clip_volume_hint", o(EXT_clip_volume_hint
), GL
, 1996 },
157 { "GL_EXT_compiled_vertex_array", o(EXT_compiled_vertex_array
), GL
, 1996 },
158 { "GL_EXT_copy_texture", o(EXT_copy_texture
), GL
, 1995 },
159 { "GL_EXT_depth_bounds_test", o(EXT_depth_bounds_test
), GL
, 2002 },
160 { "GL_EXT_draw_buffers2", o(EXT_draw_buffers2
), GL
, 2006 },
161 { "GL_EXT_draw_instanced", o(ARB_draw_instanced
), GL
, 2006 },
162 { "GL_EXT_draw_range_elements", o(EXT_draw_range_elements
), GL
, 1997 },
163 { "GL_EXT_fog_coord", o(EXT_fog_coord
), GL
, 1999 },
164 { "GL_EXT_framebuffer_blit", o(EXT_framebuffer_blit
), GL
, 2005 },
165 { "GL_EXT_framebuffer_multisample", o(EXT_framebuffer_multisample
), GL
, 2005 },
166 { "GL_EXT_framebuffer_object", o(EXT_framebuffer_object
), GL
, 2000 },
167 { "GL_EXT_framebuffer_sRGB", o(EXT_framebuffer_sRGB
), GL
, 1998 },
168 { "GL_EXT_gpu_program_parameters", o(EXT_gpu_program_parameters
), GL
, 2006 },
169 { "GL_EXT_gpu_shader4", o(EXT_gpu_shader4
), GL
, 2006 },
170 { "GL_EXT_multi_draw_arrays", o(EXT_multi_draw_arrays
), GL
| ES1
| ES2
, 1999 },
171 { "GL_EXT_packed_depth_stencil", o(EXT_packed_depth_stencil
), GL
, 2005 },
172 { "GL_EXT_packed_float", o(EXT_packed_float
), GL
, 2004 },
173 { "GL_EXT_packed_pixels", o(EXT_packed_pixels
), GL
, 1997 },
174 { "GL_EXT_paletted_texture", o(EXT_paletted_texture
), GL
, 1995 },
175 { "GL_EXT_pixel_buffer_object", o(EXT_pixel_buffer_object
), GL
, 2004 },
176 { "GL_EXT_point_parameters", o(EXT_point_parameters
), GL
, 1997 },
177 { "GL_EXT_polygon_offset", o(EXT_polygon_offset
), GL
, 1995 },
178 { "GL_EXT_provoking_vertex", o(EXT_provoking_vertex
), GL
, 2009 },
179 { "GL_EXT_rescale_normal", o(EXT_rescale_normal
), GL
, 1997 },
180 { "GL_EXT_secondary_color", o(EXT_secondary_color
), GL
, 1999 },
181 { "GL_EXT_separate_shader_objects", o(EXT_separate_shader_objects
), GL
, 2008 },
182 { "GL_EXT_separate_specular_color", o(EXT_separate_specular_color
), GL
, 1997 },
183 { "GL_EXT_shadow_funcs", o(EXT_shadow_funcs
), GL
, 2002 },
184 { "GL_EXT_shared_texture_palette", o(EXT_shared_texture_palette
), GL
, 2000 },
185 { "GL_EXT_stencil_two_side", o(EXT_stencil_two_side
), GL
, 2001 },
186 { "GL_EXT_stencil_wrap", o(EXT_stencil_wrap
), GL
, 2002 },
187 { "GL_EXT_subtexture", o(EXT_subtexture
), GL
, 1995 },
188 { "GL_EXT_texture3D", o(EXT_texture3D
), GL
, 1996 },
189 { "GL_EXT_texture_array", o(EXT_texture_array
), GL
, 2006 },
190 { "GL_EXT_texture_compression_dxt1", o(EXT_texture_compression_s3tc
), GL
| ES1
| ES2
, 2004 },
191 { "GL_EXT_texture_compression_latc", o(EXT_texture_compression_latc
), GL
, 2006 },
192 { "GL_EXT_texture_compression_rgtc", o(ARB_texture_compression_rgtc
), GL
, 2004 },
193 { "GL_EXT_texture_compression_s3tc", o(EXT_texture_compression_s3tc
), GL
, 2000 },
194 { "GL_EXT_texture_cube_map", o(ARB_texture_cube_map
), GL
, 2001 },
195 { "GL_EXT_texture_edge_clamp", o(SGIS_texture_edge_clamp
), GL
, 1997 },
196 { "GL_EXT_texture_env_add", o(EXT_texture_env_add
), GL
, 1999 },
197 { "GL_EXT_texture_env_combine", o(EXT_texture_env_combine
), GL
, 2006 },
198 { "GL_EXT_texture_env_dot3", o(EXT_texture_env_dot3
), GL
, 2000 },
199 { "GL_EXT_texture_filter_anisotropic", o(EXT_texture_filter_anisotropic
), GL
| ES1
| ES2
, 1999 },
200 { "GL_EXT_texture_format_BGRA8888", o(EXT_texture_format_BGRA8888
), ES1
| ES2
, 2009 },
201 { "GL_EXT_texture_integer", o(EXT_texture_integer
), GL
, 2006 },
202 { "GL_EXT_texture_lod_bias", o(EXT_texture_lod_bias
), GL
| ES1
, 1999 },
203 { "GL_EXT_texture_mirror_clamp", o(EXT_texture_mirror_clamp
), GL
, 2004 },
204 { "GL_EXT_texture_object", o(EXT_texture_object
), GL
, 1995 },
205 { "GL_EXT_texture", o(EXT_texture
), GL
, 1996 },
206 { "GL_EXT_texture_rectangle", o(NV_texture_rectangle
), GL
, 2004 },
207 { "GL_EXT_texture_shared_exponent", o(EXT_texture_shared_exponent
), GL
, 2004 },
208 { "GL_EXT_texture_snorm", o(EXT_texture_snorm
), GL
, 2009 },
209 { "GL_EXT_texture_sRGB", o(EXT_texture_sRGB
), GL
, 2004 },
210 { "GL_EXT_texture_sRGB_decode", o(EXT_texture_sRGB_decode
), GL
, 2006 },
211 { "GL_EXT_texture_swizzle", o(EXT_texture_swizzle
), GL
, 2008 },
212 { "GL_EXT_texture_type_2_10_10_10_REV", o(dummy_true
), ES2
, 2008 },
213 { "GL_EXT_timer_query", o(EXT_timer_query
), GL
, 2006 },
214 { "GL_EXT_transform_feedback", o(EXT_transform_feedback
), GL
, 2011 },
215 { "GL_EXT_vertex_array_bgra", o(EXT_vertex_array_bgra
), GL
, 2008 },
216 { "GL_EXT_vertex_array", o(EXT_vertex_array
), GL
, 1995 },
217 { "GL_EXT_vertex_array_set", o(EXT_vertex_array_set
), GL
, 1997 },
220 { "GL_OES_blend_equation_separate", o(EXT_blend_equation_separate
), ES1
, 2009 },
221 { "GL_OES_blend_func_separate", o(EXT_blend_func_separate
), ES1
, 2009 },
222 { "GL_OES_blend_subtract", o(EXT_blend_subtract
), ES1
, 2009 },
223 { "GL_OES_byte_coordinates", o(dummy_true
), ES1
, 2002 },
224 { "GL_OES_compressed_paletted_texture", o(dummy_false
), DISABLE
, 2003 },
225 { "GL_OES_depth24", o(EXT_framebuffer_object
), ES1
| ES2
, 2005 },
226 { "GL_OES_depth32", o(dummy_false
), DISABLE
, 2005 },
227 { "GL_OES_depth_texture", o(ARB_depth_texture
), ES2
, 2006 },
228 #if FEATURE_OES_draw_texture
229 { "GL_OES_draw_texture", o(OES_draw_texture
), ES1
| ES2
, 2004 },
231 #if FEATURE_OES_EGL_image
232 /* FIXME: Mesa expects GL_OES_EGL_image to be available in OpenGL contexts. */
233 { "GL_OES_EGL_image", o(OES_EGL_image
), GL
| ES1
| ES2
, 2006 },
235 { "GL_OES_element_index_uint", o(EXT_vertex_array
), ES1
| ES2
, 2005 },
236 { "GL_OES_fbo_render_mipmap", o(EXT_framebuffer_object
), ES1
| ES2
, 2005 },
237 { "GL_OES_fixed_point", o(dummy_true
), ES1
, 2002 },
238 { "GL_OES_framebuffer_object", o(EXT_framebuffer_object
), ES1
, 2005 },
239 { "GL_OES_mapbuffer", o(ARB_vertex_buffer_object
), ES1
| ES2
, 2005 },
240 { "GL_OES_matrix_get", o(dummy_true
), ES1
, 2004 },
241 { "GL_OES_packed_depth_stencil", o(EXT_packed_depth_stencil
), ES1
| ES2
, 2007 },
242 { "GL_OES_point_size_array", o(dummy_true
), ES1
, 2004 },
243 { "GL_OES_point_sprite", o(ARB_point_sprite
), ES1
, 2004 },
244 { "GL_OES_query_matrix", o(dummy_true
), ES1
, 2003 },
245 { "GL_OES_read_format", o(OES_read_format
), GL
| ES1
, 2003 },
246 { "GL_OES_rgb8_rgba8", o(EXT_framebuffer_object
), ES1
| ES2
, 2005 },
247 { "GL_OES_single_precision", o(dummy_true
), ES1
, 2003 },
248 { "GL_OES_standard_derivatives", o(OES_standard_derivatives
), ES2
, 2005 },
249 { "GL_OES_stencil1", o(dummy_false
), DISABLE
, 2005 },
250 { "GL_OES_stencil4", o(dummy_false
), DISABLE
, 2005 },
251 { "GL_OES_stencil8", o(EXT_framebuffer_object
), ES1
| ES2
, 2005 },
252 { "GL_OES_stencil_wrap", o(EXT_stencil_wrap
), ES1
, 2002 },
253 { "GL_OES_texture_3D", o(EXT_texture3D
), ES2
, 2005 },
254 { "GL_OES_texture_cube_map", o(ARB_texture_cube_map
), ES1
, 2007 },
255 { "GL_OES_texture_env_crossbar", o(ARB_texture_env_crossbar
), ES1
, 2005 },
256 { "GL_OES_texture_mirrored_repeat", o(ARB_texture_mirrored_repeat
), ES1
, 2005 },
257 { "GL_OES_texture_npot", o(ARB_texture_non_power_of_two
), ES2
, 2005 },
259 /* Vendor extensions */
260 { "GL_3DFX_texture_compression_FXT1", o(TDFX_texture_compression_FXT1
), GL
, 1999 },
261 { "GL_AMD_conservative_depth", o(AMD_conservative_depth
), GL
, 2009 },
262 { "GL_AMD_draw_buffers_blend", o(ARB_draw_buffers_blend
), GL
, 2009 },
263 { "GL_AMD_seamless_cubemap_per_texture", o(AMD_seamless_cubemap_per_texture
), GL
, 2009 },
264 { "GL_AMD_shader_stencil_export", o(ARB_shader_stencil_export
), GL
, 2009 },
265 { "GL_APPLE_client_storage", o(APPLE_client_storage
), GL
, 2002 },
266 { "GL_APPLE_object_purgeable", o(APPLE_object_purgeable
), GL
, 2006 },
267 { "GL_APPLE_packed_pixels", o(APPLE_packed_pixels
), GL
, 2002 },
268 { "GL_APPLE_vertex_array_object", o(APPLE_vertex_array_object
), GL
, 2002 },
269 { "GL_ATI_blend_equation_separate", o(EXT_blend_equation_separate
), GL
, 2003 },
270 { "GL_ATI_draw_buffers", o(ARB_draw_buffers
), GL
, 2002 },
271 { "GL_ATI_envmap_bumpmap", o(ATI_envmap_bumpmap
), GL
, 2001 },
272 { "GL_ATI_fragment_shader", o(ATI_fragment_shader
), GL
, 2001 },
273 { "GL_ATI_separate_stencil", o(ATI_separate_stencil
), GL
, 2006 },
274 { "GL_ATI_texture_compression_3dc", o(ATI_texture_compression_3dc
), GL
, 2004 },
275 { "GL_ATI_texture_env_combine3", o(ATI_texture_env_combine3
), GL
, 2002 },
276 { "GL_ATI_texture_float", o(ARB_texture_float
), GL
, 2002 },
277 { "GL_ATI_texture_mirror_once", o(ATI_texture_mirror_once
), GL
, 2006 },
278 { "GL_IBM_multimode_draw_arrays", o(IBM_multimode_draw_arrays
), GL
, 1998 },
279 { "GL_IBM_rasterpos_clip", o(IBM_rasterpos_clip
), GL
, 1996 },
280 { "GL_IBM_texture_mirrored_repeat", o(ARB_texture_mirrored_repeat
), GL
, 1998 },
281 { "GL_INGR_blend_func_separate", o(EXT_blend_func_separate
), GL
, 1999 },
282 { "GL_MESA_pack_invert", o(MESA_pack_invert
), GL
, 2002 },
283 { "GL_MESA_resize_buffers", o(MESA_resize_buffers
), GL
, 1999 },
284 { "GL_MESA_texture_array", o(MESA_texture_array
), GL
, 2007 },
285 { "GL_MESA_texture_signed_rgba", o(EXT_texture_snorm
), GL
, 2009 },
286 { "GL_MESA_window_pos", o(ARB_window_pos
), GL
, 2000 },
287 { "GL_MESA_ycbcr_texture", o(MESA_ycbcr_texture
), GL
, 2002 },
288 { "GL_NV_blend_square", o(NV_blend_square
), GL
, 1999 },
289 { "GL_NV_conditional_render", o(NV_conditional_render
), GL
, 2008 },
290 { "GL_NV_depth_clamp", o(ARB_depth_clamp
), GL
, 2001 },
291 { "GL_NV_fragment_program", o(NV_fragment_program
), GL
, 2001 },
292 { "GL_NV_fragment_program_option", o(NV_fragment_program_option
), GL
, 2005 },
293 { "GL_NV_light_max_exponent", o(NV_light_max_exponent
), GL
, 1999 },
294 { "GL_NV_packed_depth_stencil", o(EXT_packed_depth_stencil
), GL
, 2000 },
295 { "GL_NV_point_sprite", o(NV_point_sprite
), GL
, 2001 },
296 { "GL_NV_primitive_restart", o(NV_primitive_restart
), GL
, 2002 },
297 { "GL_NV_texgen_reflection", o(NV_texgen_reflection
), GL
, 1999 },
298 { "GL_NV_texture_barrier", o(NV_texture_barrier
), GL
, 2009 },
299 { "GL_NV_texture_env_combine4", o(NV_texture_env_combine4
), GL
, 1999 },
300 { "GL_NV_texture_rectangle", o(NV_texture_rectangle
), GL
, 2000 },
301 { "GL_NV_vertex_program1_1", o(NV_vertex_program1_1
), GL
, 2001 },
302 { "GL_NV_vertex_program", o(NV_vertex_program
), GL
, 2000 },
303 { "GL_S3_s3tc", o(S3_s3tc
), GL
, 1999 },
304 { "GL_SGIS_generate_mipmap", o(SGIS_generate_mipmap
), GL
, 1997 },
305 { "GL_SGIS_texture_border_clamp", o(ARB_texture_border_clamp
), GL
, 1997 },
306 { "GL_SGIS_texture_edge_clamp", o(SGIS_texture_edge_clamp
), GL
, 1997 },
307 { "GL_SGIS_texture_lod", o(SGIS_texture_lod
), GL
, 1997 },
308 { "GL_SUN_multi_draw_arrays", o(EXT_multi_draw_arrays
), GL
, 1999 },
315 * Given an extension name, lookup up the corresponding member of struct
316 * gl_extensions and return that member's offset (in bytes). If the name is
317 * not found in the \c extension_table, return 0.
319 * \param name Name of extension.
320 * \return Offset of member in struct gl_extensions.
323 name_to_offset(const char* name
)
325 const struct extension
*i
;
330 for (i
= extension_table
; i
->name
!= 0; ++i
) {
331 if (strcmp(name
, i
->name
) == 0)
340 * \brief Extensions enabled by default.
342 * These extensions are enabled by _mesa_init_extensions().
344 * XXX: Should these defaults also apply to GLES?
346 static const size_t default_extensions
[] = {
350 o(ARB_texture_compression
),
351 o(ARB_transpose_matrix
),
352 o(ARB_vertex_buffer_object
),
357 o(EXT_compiled_vertex_array
),
359 o(EXT_draw_range_elements
),
360 o(EXT_multi_draw_arrays
),
361 o(EXT_packed_pixels
),
362 o(EXT_polygon_offset
),
363 o(EXT_rescale_normal
),
364 o(EXT_separate_specular_color
),
368 o(EXT_texture_object
),
372 o(OES_standard_derivatives
),
374 /* Vendor Extensions */
375 o(APPLE_packed_pixels
),
376 o(IBM_multimode_draw_arrays
),
377 o(IBM_rasterpos_clip
),
378 o(NV_light_max_exponent
),
379 o(NV_texgen_reflection
),
380 o(SGIS_generate_mipmap
),
381 o(SGIS_texture_edge_clamp
),
389 * Enable all extensions suitable for a software-only renderer.
390 * This is a convenience function used by the XMesa, OSMesa, GGI drivers, etc.
393 _mesa_enable_sw_extensions(struct gl_context
*ctx
)
395 /*ctx->Extensions.ARB_copy_buffer = GL_TRUE;*/
396 ctx
->Extensions
.ARB_depth_clamp
= GL_TRUE
;
397 ctx
->Extensions
.ARB_depth_texture
= GL_TRUE
;
398 /*ctx->Extensions.ARB_draw_buffers = GL_TRUE;*/
399 ctx
->Extensions
.ARB_draw_elements_base_vertex
= GL_TRUE
;
400 ctx
->Extensions
.ARB_draw_instanced
= GL_TRUE
;
401 ctx
->Extensions
.ARB_explicit_attrib_location
= GL_TRUE
;
402 ctx
->Extensions
.ARB_fragment_coord_conventions
= GL_TRUE
;
403 #if FEATURE_ARB_fragment_program
404 ctx
->Extensions
.ARB_fragment_program
= GL_TRUE
;
405 ctx
->Extensions
.ARB_fragment_program_shadow
= GL_TRUE
;
407 #if FEATURE_ARB_fragment_shader
408 ctx
->Extensions
.ARB_fragment_shader
= GL_TRUE
;
410 #if FEATURE_ARB_framebuffer_object
411 ctx
->Extensions
.ARB_framebuffer_object
= GL_TRUE
;
413 #if FEATURE_ARB_geometry_shader4 && 0
414 /* XXX re-enable when GLSL compiler again supports geometry shaders */
415 ctx
->Extensions
.ARB_geometry_shader4
= GL_TRUE
;
417 ctx
->Extensions
.ARB_half_float_pixel
= GL_TRUE
;
418 ctx
->Extensions
.ARB_half_float_vertex
= GL_TRUE
;
419 ctx
->Extensions
.ARB_map_buffer_range
= GL_TRUE
;
420 ctx
->Extensions
.ARB_multitexture
= GL_TRUE
;
422 ctx
->Extensions
.ARB_occlusion_query
= GL_TRUE
;
423 ctx
->Extensions
.ARB_occlusion_query2
= GL_TRUE
;
425 ctx
->Extensions
.ARB_point_sprite
= GL_TRUE
;
426 #if FEATURE_ARB_shader_objects
427 ctx
->Extensions
.ARB_shader_objects
= GL_TRUE
;
428 ctx
->Extensions
.EXT_separate_shader_objects
= GL_TRUE
;
430 #if FEATURE_ARB_shading_language_100
431 ctx
->Extensions
.ARB_shading_language_100
= GL_TRUE
;
433 ctx
->Extensions
.ARB_shadow
= GL_TRUE
;
434 ctx
->Extensions
.ARB_shadow_ambient
= GL_TRUE
;
435 ctx
->Extensions
.ARB_texture_border_clamp
= GL_TRUE
;
436 ctx
->Extensions
.ARB_texture_cube_map
= GL_TRUE
;
437 ctx
->Extensions
.ARB_texture_env_combine
= GL_TRUE
;
438 ctx
->Extensions
.ARB_texture_env_crossbar
= GL_TRUE
;
439 ctx
->Extensions
.ARB_texture_env_dot3
= GL_TRUE
;
440 /*ctx->Extensions.ARB_texture_float = GL_TRUE;*/
441 ctx
->Extensions
.ARB_texture_mirrored_repeat
= GL_TRUE
;
442 ctx
->Extensions
.ARB_texture_non_power_of_two
= GL_TRUE
;
443 ctx
->Extensions
.ARB_texture_rg
= GL_TRUE
;
444 ctx
->Extensions
.ARB_texture_compression_rgtc
= GL_TRUE
;
445 ctx
->Extensions
.ARB_vertex_array_object
= GL_TRUE
;
446 #if FEATURE_ARB_vertex_program
447 ctx
->Extensions
.ARB_vertex_program
= GL_TRUE
;
449 #if FEATURE_ARB_vertex_shader
450 ctx
->Extensions
.ARB_vertex_shader
= GL_TRUE
;
452 #if FEATURE_ARB_vertex_buffer_object
453 /*ctx->Extensions.ARB_vertex_buffer_object = GL_TRUE;*/
456 ctx
->Extensions
.ARB_sync
= GL_TRUE
;
458 ctx
->Extensions
.APPLE_vertex_array_object
= GL_TRUE
;
459 #if FEATURE_APPLE_object_purgeable
460 ctx
->Extensions
.APPLE_object_purgeable
= GL_TRUE
;
462 ctx
->Extensions
.ATI_envmap_bumpmap
= GL_TRUE
;
463 #if FEATURE_ATI_fragment_shader
464 ctx
->Extensions
.ATI_fragment_shader
= GL_TRUE
;
466 ctx
->Extensions
.ATI_texture_compression_3dc
= GL_TRUE
;
467 ctx
->Extensions
.ATI_texture_env_combine3
= GL_TRUE
;
468 ctx
->Extensions
.ATI_texture_mirror_once
= GL_TRUE
;
469 ctx
->Extensions
.ATI_separate_stencil
= GL_TRUE
;
470 ctx
->Extensions
.EXT_blend_color
= GL_TRUE
;
471 ctx
->Extensions
.EXT_blend_equation_separate
= GL_TRUE
;
472 ctx
->Extensions
.EXT_blend_func_separate
= GL_TRUE
;
473 ctx
->Extensions
.EXT_blend_logic_op
= GL_TRUE
;
474 ctx
->Extensions
.EXT_blend_minmax
= GL_TRUE
;
475 ctx
->Extensions
.EXT_blend_subtract
= GL_TRUE
;
476 ctx
->Extensions
.EXT_depth_bounds_test
= GL_TRUE
;
477 ctx
->Extensions
.EXT_draw_buffers2
= GL_TRUE
;
478 ctx
->Extensions
.EXT_fog_coord
= GL_TRUE
;
479 #if FEATURE_EXT_framebuffer_object
480 ctx
->Extensions
.EXT_framebuffer_object
= GL_TRUE
;
482 #if FEATURE_EXT_framebuffer_blit
483 ctx
->Extensions
.EXT_framebuffer_blit
= GL_TRUE
;
485 #if FEATURE_ARB_framebuffer_object
486 ctx
->Extensions
.EXT_framebuffer_multisample
= GL_TRUE
;
488 /*ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;*/
489 ctx
->Extensions
.EXT_packed_depth_stencil
= GL_TRUE
;
490 ctx
->Extensions
.EXT_paletted_texture
= GL_TRUE
;
491 #if FEATURE_EXT_pixel_buffer_object
492 ctx
->Extensions
.EXT_pixel_buffer_object
= GL_TRUE
;
494 ctx
->Extensions
.EXT_point_parameters
= GL_TRUE
;
495 ctx
->Extensions
.EXT_provoking_vertex
= GL_TRUE
;
496 ctx
->Extensions
.EXT_shadow_funcs
= GL_TRUE
;
497 ctx
->Extensions
.EXT_secondary_color
= GL_TRUE
;
498 ctx
->Extensions
.EXT_shared_texture_palette
= GL_TRUE
;
499 ctx
->Extensions
.EXT_stencil_wrap
= GL_TRUE
;
500 ctx
->Extensions
.EXT_stencil_two_side
= GL_TRUE
;
501 ctx
->Extensions
.EXT_texture_array
= GL_TRUE
;
502 ctx
->Extensions
.EXT_texture_compression_latc
= GL_TRUE
;
503 ctx
->Extensions
.EXT_texture_env_add
= GL_TRUE
;
504 ctx
->Extensions
.EXT_texture_env_combine
= GL_TRUE
;
505 ctx
->Extensions
.EXT_texture_env_dot3
= GL_TRUE
;
506 ctx
->Extensions
.EXT_texture_mirror_clamp
= GL_TRUE
;
507 ctx
->Extensions
.EXT_texture_lod_bias
= GL_TRUE
;
508 ctx
->Extensions
.EXT_texture_shared_exponent
= GL_TRUE
;
509 #if FEATURE_EXT_texture_sRGB
510 ctx
->Extensions
.EXT_texture_sRGB
= GL_TRUE
;
511 ctx
->Extensions
.EXT_texture_sRGB_decode
= GL_TRUE
;
513 ctx
->Extensions
.EXT_texture_swizzle
= GL_TRUE
;
514 #if FEATURE_EXT_transform_feedback
515 /*ctx->Extensions.EXT_transform_feedback = GL_TRUE;*/
517 ctx
->Extensions
.EXT_vertex_array_bgra
= GL_TRUE
;
518 /*ctx->Extensions.IBM_multimode_draw_arrays = GL_TRUE;*/
519 ctx
->Extensions
.MESA_pack_invert
= GL_TRUE
;
520 ctx
->Extensions
.MESA_resize_buffers
= GL_TRUE
;
521 ctx
->Extensions
.MESA_texture_array
= GL_TRUE
;
522 ctx
->Extensions
.MESA_ycbcr_texture
= GL_TRUE
;
523 ctx
->Extensions
.NV_blend_square
= GL_TRUE
;
524 ctx
->Extensions
.NV_conditional_render
= GL_TRUE
;
525 /*ctx->Extensions.NV_light_max_exponent = GL_TRUE;*/
526 ctx
->Extensions
.NV_point_sprite
= GL_TRUE
;
527 ctx
->Extensions
.NV_texture_env_combine4
= GL_TRUE
;
528 ctx
->Extensions
.NV_texture_rectangle
= GL_TRUE
;
529 /*ctx->Extensions.NV_texgen_reflection = GL_TRUE;*/
530 #if FEATURE_NV_vertex_program
531 ctx
->Extensions
.NV_vertex_program
= GL_TRUE
;
532 ctx
->Extensions
.NV_vertex_program1_1
= GL_TRUE
;
534 #if FEATURE_NV_fragment_program
535 ctx
->Extensions
.NV_fragment_program
= GL_TRUE
;
537 #if FEATURE_NV_fragment_program && FEATURE_ARB_fragment_program
538 ctx
->Extensions
.NV_fragment_program_option
= GL_TRUE
;
540 /*ctx->Extensions.SGIS_generate_mipmap = GL_TRUE;*/
541 ctx
->Extensions
.SGIS_texture_edge_clamp
= GL_TRUE
;
542 #if FEATURE_ARB_vertex_program || FEATURE_ARB_fragment_program
543 ctx
->Extensions
.EXT_gpu_program_parameters
= GL_TRUE
;
545 #if FEATURE_texture_fxt1
546 _mesa_enable_extension(ctx
, "GL_3DFX_texture_compression_FXT1");
548 #if FEATURE_texture_s3tc
549 if (ctx
->Mesa_DXTn
) {
550 _mesa_enable_extension(ctx
, "GL_EXT_texture_compression_s3tc");
551 _mesa_enable_extension(ctx
, "GL_S3_s3tc");
558 * Enable common EXT extensions in the ARB_imaging subset.
561 _mesa_enable_imaging_extensions(struct gl_context
*ctx
)
563 ctx
->Extensions
.EXT_blend_color
= GL_TRUE
;
564 ctx
->Extensions
.EXT_blend_logic_op
= GL_TRUE
;
565 ctx
->Extensions
.EXT_blend_minmax
= GL_TRUE
;
566 ctx
->Extensions
.EXT_blend_subtract
= GL_TRUE
;
572 * Enable all OpenGL 1.3 features and extensions.
573 * A convenience function to be called by drivers.
576 _mesa_enable_1_3_extensions(struct gl_context
*ctx
)
578 /*ctx->Extensions.ARB_multisample = GL_TRUE;*/
579 ctx
->Extensions
.ARB_multitexture
= GL_TRUE
;
580 ctx
->Extensions
.ARB_texture_border_clamp
= GL_TRUE
;
581 /*ctx->Extensions.ARB_texture_compression = GL_TRUE;*/
582 ctx
->Extensions
.ARB_texture_cube_map
= GL_TRUE
;
583 ctx
->Extensions
.ARB_texture_env_combine
= GL_TRUE
;
584 ctx
->Extensions
.ARB_texture_env_dot3
= GL_TRUE
;
585 ctx
->Extensions
.EXT_texture_env_add
= GL_TRUE
;
586 /*ctx->Extensions.ARB_transpose_matrix = GL_TRUE;*/
592 * Enable all OpenGL 1.4 features and extensions.
593 * A convenience function to be called by drivers.
596 _mesa_enable_1_4_extensions(struct gl_context
*ctx
)
598 ctx
->Extensions
.ARB_depth_texture
= GL_TRUE
;
599 ctx
->Extensions
.ARB_shadow
= GL_TRUE
;
600 ctx
->Extensions
.ARB_texture_env_crossbar
= GL_TRUE
;
601 ctx
->Extensions
.ARB_texture_mirrored_repeat
= GL_TRUE
;
602 ctx
->Extensions
.ARB_window_pos
= GL_TRUE
;
603 ctx
->Extensions
.EXT_blend_color
= GL_TRUE
;
604 ctx
->Extensions
.EXT_blend_func_separate
= GL_TRUE
;
605 ctx
->Extensions
.EXT_blend_minmax
= GL_TRUE
;
606 ctx
->Extensions
.EXT_blend_subtract
= GL_TRUE
;
607 ctx
->Extensions
.EXT_fog_coord
= GL_TRUE
;
608 /*ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;*/
609 ctx
->Extensions
.EXT_point_parameters
= GL_TRUE
;
610 ctx
->Extensions
.EXT_secondary_color
= GL_TRUE
;
611 ctx
->Extensions
.EXT_stencil_wrap
= GL_TRUE
;
612 ctx
->Extensions
.EXT_texture_lod_bias
= GL_TRUE
;
613 /*ctx->Extensions.SGIS_generate_mipmap = GL_TRUE;*/
618 * Enable all OpenGL 1.5 features and extensions.
619 * A convenience function to be called by drivers.
622 _mesa_enable_1_5_extensions(struct gl_context
*ctx
)
624 ctx
->Extensions
.ARB_occlusion_query
= GL_TRUE
;
625 /*ctx->Extensions.ARB_vertex_buffer_object = GL_TRUE;*/
626 ctx
->Extensions
.EXT_shadow_funcs
= GL_TRUE
;
631 * Enable all OpenGL 2.0 features and extensions.
632 * A convenience function to be called by drivers.
635 _mesa_enable_2_0_extensions(struct gl_context
*ctx
)
637 /*ctx->Extensions.ARB_draw_buffers = GL_TRUE;*/
638 #if FEATURE_ARB_fragment_shader
639 ctx
->Extensions
.ARB_fragment_shader
= GL_TRUE
;
641 ctx
->Extensions
.ARB_point_sprite
= GL_TRUE
;
642 ctx
->Extensions
.EXT_blend_equation_separate
= GL_TRUE
;
643 ctx
->Extensions
.ARB_texture_non_power_of_two
= GL_TRUE
;
644 #if FEATURE_ARB_shader_objects
645 ctx
->Extensions
.ARB_shader_objects
= GL_TRUE
;
647 #if FEATURE_ARB_shading_language_100
648 ctx
->Extensions
.ARB_shading_language_100
= GL_TRUE
;
650 ctx
->Extensions
.EXT_stencil_two_side
= GL_TRUE
;
651 #if FEATURE_ARB_vertex_shader
652 ctx
->Extensions
.ARB_vertex_shader
= GL_TRUE
;
658 * Enable all OpenGL 2.1 features and extensions.
659 * A convenience function to be called by drivers.
662 _mesa_enable_2_1_extensions(struct gl_context
*ctx
)
664 #if FEATURE_EXT_pixel_buffer_object
665 ctx
->Extensions
.EXT_pixel_buffer_object
= GL_TRUE
;
667 #if FEATURE_EXT_texture_sRGB
668 ctx
->Extensions
.EXT_texture_sRGB
= GL_TRUE
;
674 * Either enable or disable the named extension.
675 * \return GL_TRUE for success, GL_FALSE if invalid extension name
678 set_extension( struct gl_context
*ctx
, const char *name
, GLboolean state
)
682 if (ctx
->Extensions
.String
) {
683 /* The string was already queried - can't change it now! */
684 _mesa_problem(ctx
, "Trying to enable/disable extension after glGetString(GL_EXTENSIONS): %s", name
);
688 offset
= name_to_offset(name
);
690 _mesa_problem(ctx
, "Trying to enable/disable unknown extension %s",
693 } else if (offset
== o(dummy_true
) && state
== GL_FALSE
) {
694 _mesa_problem(ctx
, "Trying to disable a permanently enabled extension: "
698 GLboolean
*base
= (GLboolean
*) &ctx
->Extensions
;
699 base
[offset
] = state
;
706 * Enable the named extension.
707 * Typically called by drivers.
710 _mesa_enable_extension( struct gl_context
*ctx
, const char *name
)
712 if (!set_extension(ctx
, name
, GL_TRUE
))
713 _mesa_problem(ctx
, "Trying to enable unknown extension: %s", name
);
718 * Disable the named extension.
719 * XXX is this really needed???
722 _mesa_disable_extension( struct gl_context
*ctx
, const char *name
)
724 if (!set_extension(ctx
, name
, GL_FALSE
))
725 _mesa_problem(ctx
, "Trying to disable unknown extension: %s", name
);
730 * Test if the named extension is enabled in this context.
733 _mesa_extension_is_enabled( struct gl_context
*ctx
, const char *name
)
741 offset
= name_to_offset(name
);
744 base
= (GLboolean
*) &ctx
->Extensions
;
750 * \brief Apply the \c MESA_EXTENSION_OVERRIDE environment variable.
752 * \c MESA_EXTENSION_OVERRIDE is a space-separated list of extensions to
753 * enable or disable. The list is processed thus:
754 * - Enable recognized extension names that are prefixed with '+'.
755 * - Disable recognized extension names that are prefixed with '-'.
756 * - Enable recognized extension names that are not prefixed.
757 * - Collect unrecognized extension names in a new string.
759 * \return Space-separated list of unrecognized extension names (which must
760 * be freed). Does not return \c NULL.
763 get_extension_override( struct gl_context
*ctx
)
765 const char *env_const
= _mesa_getenv("MESA_EXTENSION_OVERRIDE");
771 if (env_const
== NULL
) {
772 /* Return the empty string rather than NULL. This simplifies the logic
773 * of client functions. */
774 return calloc(1, sizeof(char));
777 /* extra_exts: List of unrecognized extensions. */
778 extra_exts
= calloc(strlen(env_const
), sizeof(char));
780 /* Copy env_const because strtok() is destructive. */
781 env
= strdup(env_const
);
782 for (ext
= strtok(env
, " "); ext
!= NULL
; ext
= strtok(NULL
, " ")) {
798 recognized
= set_extension(ctx
, ext
, enable
);
800 strcat(extra_exts
, ext
);
801 strcat(extra_exts
, " ");
805 /* Remove trailing space. */
806 len
= strlen(extra_exts
);
807 if (extra_exts
[len
- 1] == ' ')
808 extra_exts
[len
- 1] = '\0';
815 * \brief Initialize extension tables and enable default extensions.
817 * This should be called during context initialization.
818 * Note: Sets gl_extensions.dummy_true to true.
821 _mesa_init_extensions( struct gl_context
*ctx
)
823 GLboolean
*base
= (GLboolean
*) &ctx
->Extensions
;
824 GLboolean
*sentinel
= base
+ o(extension_sentinel
);
828 /* First, turn all extensions off. */
829 for (i
= base
; i
!= sentinel
; ++i
)
832 /* Then, selectively turn default extensions on. */
833 ctx
->Extensions
.dummy_true
= GL_TRUE
;
834 for (j
= default_extensions
; *j
!= 0; ++j
)
839 typedef unsigned short extension_index
;
843 * Compare two entries of the extensions table. Sorts first by year,
846 * Arguments are indices into extension_table.
849 extension_compare(const void *p1
, const void *p2
)
851 extension_index i1
= * (const extension_index
*) p1
;
852 extension_index i2
= * (const extension_index
*) p2
;
853 const struct extension
*e1
= &extension_table
[i1
];
854 const struct extension
*e2
= &extension_table
[i2
];
857 res
= (int)e1
->year
- (int)e2
->year
;
860 res
= strcmp(e1
->name
, e2
->name
);
868 * Construct the GL_EXTENSIONS string. Called the first time that
869 * glGetString(GL_EXTENSIONS) is called.
872 _mesa_make_extension_string(struct gl_context
*ctx
)
874 /* The extension string. */
876 /* Length of extension string. */
878 /* Number of extensions */
880 /* Indices of the extensions sorted by year */
881 extension_index
*extension_indices
;
882 /* String of extra extensions. */
883 char *extra_extensions
= get_extension_override(ctx
);
884 GLboolean
*base
= (GLboolean
*) &ctx
->Extensions
;
885 const struct extension
*i
;
887 unsigned maxYear
= ~0;
889 /* Check if the MESA_EXTENSION_MAX_YEAR env var is set */
891 const char *env
= getenv("MESA_EXTENSION_MAX_YEAR");
894 _mesa_debug(ctx
, "Note: limiting GL extensions to %u or earlier\n",
899 /* Compute length of the extension string. */
901 for (i
= extension_table
; i
->name
!= 0; ++i
) {
902 if (base
[i
->offset
] &&
903 i
->year
<= maxYear
&&
904 (i
->api_set
& (1 << ctx
->API
))) {
905 length
+= strlen(i
->name
) + 1; /* +1 for space */
909 if (extra_extensions
!= NULL
)
910 length
+= 1 + strlen(extra_extensions
); /* +1 for space */
912 exts
= (char *) calloc(length
+ 1, sizeof(char));
914 free(extra_extensions
);
918 extension_indices
= malloc(count
* sizeof(extension_index
));
919 if (extension_indices
== NULL
) {
921 free(extra_extensions
);
925 /* Sort extensions in chronological order because certain old applications (e.g.,
926 * Quake3 demo) store the extension list in a static size buffer so chronologically
927 * order ensure that the extensions that such applications expect will fit into
931 for (i
= extension_table
; i
->name
!= 0; ++i
) {
932 if (base
[i
->offset
] &&
933 i
->year
<= maxYear
&&
934 (i
->api_set
& (1 << ctx
->API
))) {
935 extension_indices
[j
++] = i
- extension_table
;
939 qsort(extension_indices
, count
, sizeof *extension_indices
, extension_compare
);
941 /* Build the extension string.*/
942 for (j
= 0; j
< count
; ++j
) {
943 i
= &extension_table
[extension_indices
[j
]];
944 assert(base
[i
->offset
] && (i
->api_set
& (1 << ctx
->API
)));
945 strcat(exts
, i
->name
);
948 free(extension_indices
);
949 if (extra_extensions
!= 0) {
950 strcat(exts
, extra_extensions
);
951 free(extra_extensions
);
954 return (GLubyte
*) exts
;
958 * Return number of enabled extensions.
961 _mesa_get_extension_count(struct gl_context
*ctx
)
964 const struct extension
*i
;
966 /* only count once */
967 if (ctx
->Extensions
.Count
!= 0)
968 return ctx
->Extensions
.Count
;
970 base
= (GLboolean
*) &ctx
->Extensions
;
971 for (i
= extension_table
; i
->name
!= 0; ++i
) {
972 if (base
[i
->offset
]) {
973 ctx
->Extensions
.Count
++;
976 return ctx
->Extensions
.Count
;
980 * Return name of i-th enabled extension
983 _mesa_get_enabled_extension(struct gl_context
*ctx
, GLuint index
)
985 const GLboolean
*base
;
987 const struct extension
*i
;
992 base
= (GLboolean
*) &ctx
->Extensions
;
994 for (i
= extension_table
; i
->name
!= 0; ++i
) {
995 if (n
== index
&& base
[i
->offset
]) {
996 return (GLubyte
*) i
->name
;
997 } else if (base
[i
->offset
]) {