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"
40 #define ALIGN(value, alignment) (((value) + alignment - 1) & ~(alignment - 1))
44 GLL
= 1 << API_OPENGL
, /* GL Legacy / Compatibility */
45 GLC
= 1 << API_OPENGL_CORE
, /* GL Core */
46 GL
= (1 << API_OPENGL
) | (1 << API_OPENGL_CORE
),
47 ES1
= 1 << API_OPENGLES
,
48 ES2
= 1 << API_OPENGLES2
,
52 * \brief An element of the \c extension_table.
55 /** Name of extension, such as "GL_ARB_depth_clamp". */
58 /** Offset (in bytes) of the corresponding member in struct gl_extensions. */
61 /** Set of API's in which the extension exists, as a bitset. */
64 /** Year the extension was proposed or approved. Used to sort the
65 * extension string chronologically. */
71 * Given a member \c x of struct gl_extensions, return offset of
74 #define o(x) offsetof(struct gl_extensions, x)
78 * \brief Table of supported OpenGL extensions for all API's.
80 static const struct extension extension_table
[] = {
82 { "GL_ARB_ES2_compatibility", o(ARB_ES2_compatibility
), GL
, 2009 },
83 { "GL_ARB_base_instance", o(ARB_base_instance
), GL
, 2011 },
84 { "GL_ARB_blend_func_extended", o(ARB_blend_func_extended
), GL
, 2009 },
85 { "GL_ARB_color_buffer_float", o(ARB_color_buffer_float
), GL
, 2004 },
86 { "GL_ARB_copy_buffer", o(ARB_copy_buffer
), GL
, 2008 },
87 { "GL_ARB_conservative_depth", o(ARB_conservative_depth
), GL
, 2011 },
88 { "GL_ARB_debug_output", o(dummy_true
), GL
, 2009 },
89 { "GL_ARB_depth_buffer_float", o(ARB_depth_buffer_float
), GL
, 2008 },
90 { "GL_ARB_depth_clamp", o(ARB_depth_clamp
), GL
, 2003 },
91 { "GL_ARB_depth_texture", o(ARB_depth_texture
), GLL
, 2001 },
92 { "GL_ARB_draw_buffers", o(dummy_true
), GL
, 2002 },
93 { "GL_ARB_draw_buffers_blend", o(ARB_draw_buffers_blend
), GL
, 2009 },
94 { "GL_ARB_draw_elements_base_vertex", o(ARB_draw_elements_base_vertex
), GL
, 2009 },
95 { "GL_ARB_draw_instanced", o(ARB_draw_instanced
), GL
, 2008 },
96 { "GL_ARB_explicit_attrib_location", o(ARB_explicit_attrib_location
), GL
, 2009 },
97 { "GL_ARB_fragment_coord_conventions", o(ARB_fragment_coord_conventions
), GL
, 2009 },
98 { "GL_ARB_fragment_program", o(ARB_fragment_program
), GLL
, 2002 },
99 { "GL_ARB_fragment_program_shadow", o(ARB_fragment_program_shadow
), GLL
, 2003 },
100 { "GL_ARB_fragment_shader", o(ARB_fragment_shader
), GL
, 2002 },
101 { "GL_ARB_framebuffer_object", o(ARB_framebuffer_object
), GL
, 2005 },
102 { "GL_ARB_framebuffer_sRGB", o(EXT_framebuffer_sRGB
), GL
, 1998 },
103 { "GL_ARB_half_float_pixel", o(ARB_half_float_pixel
), GL
, 2003 },
104 { "GL_ARB_half_float_vertex", o(ARB_half_float_vertex
), GL
, 2008 },
105 { "GL_ARB_instanced_arrays", o(ARB_instanced_arrays
), GL
, 2008 },
106 { "GL_ARB_invalidate_subdata", o(dummy_true
), GL
, 2012 },
107 { "GL_ARB_map_buffer_range", o(ARB_map_buffer_range
), GL
, 2008 },
108 { "GL_ARB_multisample", o(dummy_true
), GLL
, 1994 },
109 { "GL_ARB_multitexture", o(dummy_true
), GLL
, 1998 },
110 { "GL_ARB_occlusion_query2", o(ARB_occlusion_query2
), GL
, 2003 },
111 { "GL_ARB_occlusion_query", o(ARB_occlusion_query
), GLL
, 2001 },
112 { "GL_ARB_pixel_buffer_object", o(EXT_pixel_buffer_object
), GL
, 2004 },
113 { "GL_ARB_point_parameters", o(EXT_point_parameters
), GLL
, 1997 },
114 { "GL_ARB_point_sprite", o(ARB_point_sprite
), GL
, 2003 },
115 { "GL_ARB_provoking_vertex", o(EXT_provoking_vertex
), GL
, 2009 },
116 { "GL_ARB_robustness", o(dummy_true
), GL
, 2010 },
117 { "GL_ARB_sampler_objects", o(dummy_true
), GL
, 2009 },
118 { "GL_ARB_seamless_cube_map", o(ARB_seamless_cube_map
), GL
, 2009 },
119 { "GL_ARB_shader_bit_encoding", o(ARB_shader_bit_encoding
), GL
, 2010 },
120 { "GL_ARB_shader_objects", o(ARB_shader_objects
), GL
, 2002 },
121 { "GL_ARB_shader_stencil_export", o(ARB_shader_stencil_export
), GL
, 2009 },
122 { "GL_ARB_shader_texture_lod", o(ARB_shader_texture_lod
), GL
, 2009 },
123 { "GL_ARB_shading_language_100", o(ARB_shading_language_100
), GLL
, 2003 },
124 { "GL_ARB_shadow", o(ARB_shadow
), GLL
, 2001 },
125 { "GL_ARB_sync", o(ARB_sync
), GL
, 2003 },
126 { "GL_ARB_texture_border_clamp", o(ARB_texture_border_clamp
), GLL
, 2000 },
127 { "GL_ARB_texture_buffer_object", o(ARB_texture_buffer_object
), GL
, 2008 },
128 { "GL_ARB_texture_compression", o(dummy_true
), GLL
, 2000 },
129 { "GL_ARB_texture_compression_rgtc", o(ARB_texture_compression_rgtc
), GL
, 2004 },
130 { "GL_ARB_texture_cube_map", o(ARB_texture_cube_map
), GLL
, 1999 },
131 { "GL_ARB_texture_env_add", o(dummy_true
), GLL
, 1999 },
132 { "GL_ARB_texture_env_combine", o(ARB_texture_env_combine
), GLL
, 2001 },
133 { "GL_ARB_texture_env_crossbar", o(ARB_texture_env_crossbar
), GLL
, 2001 },
134 { "GL_ARB_texture_env_dot3", o(ARB_texture_env_dot3
), GLL
, 2001 },
135 { "GL_ARB_texture_float", o(ARB_texture_float
), GL
, 2004 },
136 { "GL_ARB_texture_mirrored_repeat", o(dummy_true
), GLL
, 2001 },
137 { "GL_ARB_texture_multisample", o(ARB_texture_multisample
), GL
, 2009 },
138 { "GL_ARB_texture_non_power_of_two", o(ARB_texture_non_power_of_two
), GL
, 2003 },
139 { "GL_ARB_texture_rectangle", o(NV_texture_rectangle
), GL
, 2004 },
140 { "GL_ARB_texture_rgb10_a2ui", o(ARB_texture_rgb10_a2ui
), GL
, 2009 },
141 { "GL_ARB_texture_rg", o(ARB_texture_rg
), GL
, 2008 },
142 { "GL_ARB_texture_storage", o(ARB_texture_storage
), GL
, 2011 },
143 { "GL_ARB_texture_swizzle", o(EXT_texture_swizzle
), GL
, 2008 },
144 { "GL_ARB_timer_query", o(ARB_timer_query
), GL
, 2010 },
145 { "GL_ARB_transform_feedback2", o(ARB_transform_feedback2
), GL
, 2010 },
146 { "GL_ARB_transform_feedback3", o(ARB_transform_feedback3
), GL
, 2010 },
147 { "GL_ARB_transform_feedback_instanced", o(ARB_transform_feedback_instanced
), GL
, 2011 },
148 { "GL_ARB_transpose_matrix", o(ARB_transpose_matrix
), GLL
, 1999 },
149 { "GL_ARB_uniform_buffer_object", o(ARB_uniform_buffer_object
), GL
, 2009 },
150 { "GL_ARB_vertex_array_bgra", o(EXT_vertex_array_bgra
), GL
, 2008 },
151 { "GL_ARB_vertex_array_object", o(dummy_true
), GL
, 2006 },
152 { "GL_ARB_vertex_buffer_object", o(dummy_true
), GLL
, 2003 },
153 { "GL_ARB_vertex_program", o(ARB_vertex_program
), GLL
, 2002 },
154 { "GL_ARB_vertex_shader", o(ARB_vertex_shader
), GL
, 2002 },
155 { "GL_ARB_vertex_type_2_10_10_10_rev", o(ARB_vertex_type_2_10_10_10_rev
), GL
, 2009 },
156 { "GL_ARB_window_pos", o(ARB_window_pos
), GLL
, 2001 },
158 { "GL_EXT_abgr", o(dummy_true
), GL
, 1995 },
159 { "GL_EXT_bgra", o(dummy_true
), GLL
, 1995 },
160 { "GL_EXT_blend_color", o(EXT_blend_color
), GLL
, 1995 },
161 { "GL_EXT_blend_equation_separate", o(EXT_blend_equation_separate
), GL
, 2003 },
162 { "GL_EXT_blend_func_separate", o(EXT_blend_func_separate
), GLL
, 1999 },
163 { "GL_EXT_blend_minmax", o(EXT_blend_minmax
), GLL
| ES1
| ES2
, 1995 },
164 { "GL_EXT_blend_subtract", o(dummy_true
), GLL
, 1995 },
165 { "GL_EXT_clip_volume_hint", o(EXT_clip_volume_hint
), GL
, 1996 },
166 { "GL_EXT_compiled_vertex_array", o(EXT_compiled_vertex_array
), GLL
, 1996 },
167 { "GL_EXT_copy_texture", o(dummy_true
), GLL
, 1995 },
168 { "GL_EXT_depth_bounds_test", o(EXT_depth_bounds_test
), GL
, 2002 },
169 { "GL_EXT_draw_buffers2", o(EXT_draw_buffers2
), GL
, 2006 },
170 { "GL_EXT_draw_instanced", o(ARB_draw_instanced
), GL
, 2006 },
171 { "GL_EXT_draw_range_elements", o(EXT_draw_range_elements
), GLL
, 1997 },
172 { "GL_EXT_fog_coord", o(EXT_fog_coord
), GLL
, 1999 },
173 { "GL_EXT_framebuffer_blit", o(EXT_framebuffer_blit
), GL
, 2005 },
174 { "GL_EXT_framebuffer_multisample", o(EXT_framebuffer_multisample
), GL
, 2005 },
175 { "GL_EXT_framebuffer_object", o(EXT_framebuffer_object
), GL
, 2000 },
176 { "GL_EXT_framebuffer_sRGB", o(EXT_framebuffer_sRGB
), GL
, 1998 },
177 { "GL_EXT_gpu_program_parameters", o(EXT_gpu_program_parameters
), GLL
, 2006 },
178 { "GL_EXT_gpu_shader4", o(EXT_gpu_shader4
), GL
, 2006 },
179 { "GL_EXT_multi_draw_arrays", o(dummy_true
), GLL
| ES1
| ES2
, 1999 },
180 { "GL_EXT_packed_depth_stencil", o(EXT_packed_depth_stencil
), GL
, 2005 },
181 { "GL_EXT_packed_float", o(EXT_packed_float
), GL
, 2004 },
182 { "GL_EXT_packed_pixels", o(EXT_packed_pixels
), GLL
, 1997 },
183 { "GL_EXT_pixel_buffer_object", o(EXT_pixel_buffer_object
), GL
, 2004 },
184 { "GL_EXT_point_parameters", o(EXT_point_parameters
), GLL
, 1997 },
185 { "GL_EXT_polygon_offset", o(dummy_true
), GLL
, 1995 },
186 { "GL_EXT_provoking_vertex", o(EXT_provoking_vertex
), GL
, 2009 },
187 { "GL_EXT_rescale_normal", o(EXT_rescale_normal
), GLL
, 1997 },
188 { "GL_EXT_secondary_color", o(EXT_secondary_color
), GLL
, 1999 },
189 { "GL_EXT_separate_shader_objects", o(EXT_separate_shader_objects
), GLL
, 2008 },
190 { "GL_EXT_separate_specular_color", o(EXT_separate_specular_color
), GLL
, 1997 },
191 { "GL_EXT_shadow_funcs", o(EXT_shadow_funcs
), GLL
, 2002 },
192 { "GL_EXT_stencil_two_side", o(EXT_stencil_two_side
), GLL
, 2001 },
193 { "GL_EXT_stencil_wrap", o(dummy_true
), GLL
, 2002 },
194 { "GL_EXT_subtexture", o(dummy_true
), GLL
, 1995 },
195 { "GL_EXT_texture3D", o(EXT_texture3D
), GLL
, 1996 },
196 { "GL_EXT_texture_array", o(EXT_texture_array
), GL
, 2006 },
197 { "GL_EXT_texture_compression_dxt1", o(EXT_texture_compression_s3tc
), GL
| ES1
| ES2
, 2004 },
198 { "GL_EXT_texture_compression_latc", o(EXT_texture_compression_latc
), GL
, 2006 },
199 { "GL_EXT_texture_compression_rgtc", o(ARB_texture_compression_rgtc
), GL
, 2004 },
200 { "GL_EXT_texture_compression_s3tc", o(EXT_texture_compression_s3tc
), GL
, 2000 },
201 { "GL_EXT_texture_cube_map", o(ARB_texture_cube_map
), GLL
, 2001 },
202 { "GL_EXT_texture_edge_clamp", o(dummy_true
), GLL
, 1997 },
203 { "GL_EXT_texture_env_add", o(dummy_true
), GLL
, 1999 },
204 { "GL_EXT_texture_env_combine", o(dummy_true
), GLL
, 2000 },
205 { "GL_EXT_texture_env_dot3", o(EXT_texture_env_dot3
), GLL
, 2000 },
206 { "GL_EXT_texture_filter_anisotropic", o(EXT_texture_filter_anisotropic
), GL
| ES1
| ES2
, 1999 },
207 { "GL_EXT_texture_format_BGRA8888", o(dummy_true
), ES1
| ES2
, 2005 },
208 { "GL_EXT_texture_rg", o(ARB_texture_rg
), ES2
, 2011 },
209 { "GL_EXT_read_format_bgra", o(dummy_true
), ES1
| ES2
, 2009 },
210 { "GL_EXT_texture_integer", o(EXT_texture_integer
), GL
, 2006 },
211 { "GL_EXT_texture_lod_bias", o(dummy_true
), GLL
| ES1
, 1999 },
212 { "GL_EXT_texture_mirror_clamp", o(EXT_texture_mirror_clamp
), GL
, 2004 },
213 { "GL_EXT_texture_object", o(dummy_true
), GLL
, 1995 },
214 { "GL_EXT_texture", o(dummy_true
), GLL
, 1996 },
215 { "GL_EXT_texture_rectangle", o(NV_texture_rectangle
), GLL
, 2004 },
216 { "GL_EXT_texture_shared_exponent", o(EXT_texture_shared_exponent
), GL
, 2004 },
217 { "GL_EXT_texture_snorm", o(EXT_texture_snorm
), GL
, 2009 },
218 { "GL_EXT_texture_sRGB", o(EXT_texture_sRGB
), GL
, 2004 },
219 { "GL_EXT_texture_sRGB_decode", o(EXT_texture_sRGB_decode
), GL
, 2006 },
220 { "GL_EXT_texture_swizzle", o(EXT_texture_swizzle
), GL
, 2008 },
221 { "GL_EXT_texture_type_2_10_10_10_REV", o(dummy_true
), ES2
, 2008 },
222 { "GL_EXT_timer_query", o(EXT_timer_query
), GL
, 2006 },
223 { "GL_EXT_transform_feedback", o(EXT_transform_feedback
), GL
, 2011 },
224 { "GL_EXT_unpack_subimage", o(dummy_true
), ES2
, 2011 },
225 { "GL_EXT_vertex_array_bgra", o(EXT_vertex_array_bgra
), GL
, 2008 },
226 { "GL_EXT_vertex_array", o(dummy_true
), GLL
, 1995 },
229 { "GL_OES_blend_equation_separate", o(EXT_blend_equation_separate
), ES1
, 2009 },
230 { "GL_OES_blend_func_separate", o(EXT_blend_func_separate
), ES1
, 2009 },
231 { "GL_OES_blend_subtract", o(dummy_true
), ES1
, 2009 },
232 { "GL_OES_byte_coordinates", o(dummy_true
), ES1
, 2002 },
233 { "GL_OES_compressed_ETC1_RGB8_texture", o(OES_compressed_ETC1_RGB8_texture
), ES1
| ES2
, 2005 },
234 { "GL_OES_compressed_paletted_texture", o(dummy_true
), ES1
, 2003 },
235 { "GL_OES_depth24", o(EXT_framebuffer_object
), ES1
| ES2
, 2005 },
236 { "GL_OES_depth32", o(dummy_false
), DISABLE
, 2005 },
237 { "GL_OES_depth_texture", o(ARB_depth_texture
), ES2
, 2006 },
238 #if FEATURE_OES_draw_texture
239 { "GL_OES_draw_texture", o(OES_draw_texture
), ES1
, 2004 },
241 #if FEATURE_OES_EGL_image
242 /* FIXME: Mesa expects GL_OES_EGL_image to be available in OpenGL contexts. */
243 { "GL_OES_EGL_image", o(OES_EGL_image
), GL
| ES1
| ES2
, 2006 },
244 { "GL_OES_EGL_image_external", o(OES_EGL_image_external
), ES1
| ES2
, 2010 },
246 { "GL_OES_element_index_uint", o(dummy_true
), ES1
| ES2
, 2005 },
247 { "GL_OES_fbo_render_mipmap", o(EXT_framebuffer_object
), ES1
| ES2
, 2005 },
248 { "GL_OES_fixed_point", o(dummy_true
), ES1
, 2002 },
249 { "GL_OES_framebuffer_object", o(EXT_framebuffer_object
), ES1
, 2005 },
250 { "GL_OES_mapbuffer", o(dummy_true
), ES1
| ES2
, 2005 },
251 { "GL_OES_matrix_get", o(dummy_true
), ES1
, 2004 },
252 { "GL_OES_packed_depth_stencil", o(EXT_packed_depth_stencil
), ES1
| ES2
, 2007 },
253 { "GL_OES_point_size_array", o(dummy_true
), ES1
, 2004 },
254 { "GL_OES_point_sprite", o(ARB_point_sprite
), ES1
, 2004 },
255 { "GL_OES_query_matrix", o(dummy_true
), ES1
, 2003 },
256 { "GL_OES_read_format", o(dummy_true
), GL
| ES1
, 2003 },
257 { "GL_OES_rgb8_rgba8", o(EXT_framebuffer_object
), ES1
| ES2
, 2005 },
258 { "GL_OES_single_precision", o(dummy_true
), ES1
, 2003 },
259 { "GL_OES_standard_derivatives", o(OES_standard_derivatives
), ES2
, 2005 },
260 { "GL_OES_stencil1", o(dummy_false
), DISABLE
, 2005 },
261 { "GL_OES_stencil4", o(dummy_false
), DISABLE
, 2005 },
262 { "GL_OES_stencil8", o(EXT_framebuffer_object
), ES1
| ES2
, 2005 },
263 { "GL_OES_stencil_wrap", o(dummy_true
), ES1
, 2002 },
264 { "GL_OES_texture_3D", o(EXT_texture3D
), ES2
, 2005 },
265 { "GL_OES_texture_cube_map", o(ARB_texture_cube_map
), ES1
, 2007 },
266 { "GL_OES_texture_env_crossbar", o(ARB_texture_env_crossbar
), ES1
, 2005 },
267 { "GL_OES_texture_mirrored_repeat", o(dummy_true
), ES1
, 2005 },
268 { "GL_OES_texture_npot", o(ARB_texture_non_power_of_two
), ES2
, 2005 },
269 { "GL_OES_vertex_array_object", o(dummy_true
), ES1
| ES2
, 2010 },
271 /* Vendor extensions */
272 { "GL_3DFX_texture_compression_FXT1", o(TDFX_texture_compression_FXT1
), GL
, 1999 },
273 { "GL_AMD_conservative_depth", o(ARB_conservative_depth
), GL
, 2009 },
274 { "GL_AMD_draw_buffers_blend", o(ARB_draw_buffers_blend
), GL
, 2009 },
275 { "GL_AMD_seamless_cubemap_per_texture", o(AMD_seamless_cubemap_per_texture
), GL
, 2009 },
276 { "GL_AMD_shader_stencil_export", o(ARB_shader_stencil_export
), GL
, 2009 },
277 { "GL_APPLE_object_purgeable", o(APPLE_object_purgeable
), GL
, 2006 },
278 { "GL_APPLE_packed_pixels", o(APPLE_packed_pixels
), GLL
, 2002 },
279 { "GL_APPLE_texture_max_level", o(dummy_true
), ES1
| ES2
, 2009 },
280 { "GL_APPLE_vertex_array_object", o(dummy_true
), GLL
, 2002 },
281 { "GL_ATI_blend_equation_separate", o(EXT_blend_equation_separate
), GL
, 2003 },
282 { "GL_ATI_draw_buffers", o(dummy_true
), GLL
, 2002 },
283 { "GL_ATI_envmap_bumpmap", o(ATI_envmap_bumpmap
), GLL
, 2001 },
284 { "GL_ATI_fragment_shader", o(ATI_fragment_shader
), GLL
, 2001 },
285 { "GL_ATI_separate_stencil", o(ATI_separate_stencil
), GLL
, 2006 },
286 { "GL_ATI_texture_compression_3dc", o(ATI_texture_compression_3dc
), GL
, 2004 },
287 { "GL_ATI_texture_env_combine3", o(ATI_texture_env_combine3
), GLL
, 2002 },
288 { "GL_ATI_texture_float", o(ARB_texture_float
), GL
, 2002 },
289 { "GL_ATI_texture_mirror_once", o(ATI_texture_mirror_once
), GL
, 2006 },
290 { "GL_IBM_multimode_draw_arrays", o(IBM_multimode_draw_arrays
), GL
, 1998 },
291 { "GL_IBM_rasterpos_clip", o(IBM_rasterpos_clip
), GL
, 1996 },
292 { "GL_IBM_texture_mirrored_repeat", o(dummy_true
), GLL
, 1998 },
293 { "GL_INGR_blend_func_separate", o(EXT_blend_func_separate
), GLL
, 1999 },
294 { "GL_MESA_pack_invert", o(MESA_pack_invert
), GL
, 2002 },
295 { "GL_MESA_resize_buffers", o(MESA_resize_buffers
), GL
, 1999 },
296 { "GL_MESA_texture_array", o(MESA_texture_array
), GLL
, 2007 },
297 { "GL_MESA_texture_signed_rgba", o(EXT_texture_snorm
), GL
, 2009 },
298 { "GL_MESA_window_pos", o(ARB_window_pos
), GLL
, 2000 },
299 { "GL_MESA_ycbcr_texture", o(MESA_ycbcr_texture
), GL
, 2002 },
300 { "GL_NV_blend_square", o(NV_blend_square
), GLL
, 1999 },
301 { "GL_NV_conditional_render", o(NV_conditional_render
), GL
, 2008 },
302 { "GL_NV_depth_clamp", o(ARB_depth_clamp
), GL
, 2001 },
303 { "GL_NV_draw_buffers", o(dummy_true
), ES2
, 2011 },
304 { "GL_NV_fbo_color_attachments", o(EXT_framebuffer_object
), ES2
, 2010 },
305 { "GL_NV_fog_distance", o(NV_fog_distance
), GLL
, 2001 },
306 { "GL_NV_fragment_program", o(NV_fragment_program
), GLL
, 2001 },
307 { "GL_NV_fragment_program_option", o(NV_fragment_program_option
), GLL
, 2005 },
308 { "GL_NV_light_max_exponent", o(NV_light_max_exponent
), GLL
, 1999 },
309 { "GL_NV_packed_depth_stencil", o(EXT_packed_depth_stencil
), GL
, 2000 },
310 { "GL_NV_point_sprite", o(NV_point_sprite
), GL
, 2001 },
311 { "GL_NV_primitive_restart", o(NV_primitive_restart
), GL
, 2002 },
312 { "GL_NV_read_buffer", o(dummy_true
), ES2
, 2011 },
313 { "GL_NV_texgen_reflection", o(NV_texgen_reflection
), GLL
, 1999 },
314 { "GL_NV_texture_barrier", o(NV_texture_barrier
), GL
, 2009 },
315 { "GL_NV_texture_env_combine4", o(NV_texture_env_combine4
), GLL
, 1999 },
316 { "GL_NV_texture_rectangle", o(NV_texture_rectangle
), GLL
, 2000 },
317 { "GL_NV_vertex_program1_1", o(NV_vertex_program1_1
), GLL
, 2001 },
318 { "GL_NV_vertex_program", o(NV_vertex_program
), GLL
, 2000 },
319 { "GL_S3_s3tc", o(S3_s3tc
), GL
, 1999 },
320 { "GL_SGIS_generate_mipmap", o(dummy_true
), GLL
, 1997 },
321 { "GL_SGIS_texture_border_clamp", o(ARB_texture_border_clamp
), GLL
, 1997 },
322 { "GL_SGIS_texture_edge_clamp", o(dummy_true
), GLL
, 1997 },
323 { "GL_SGIS_texture_lod", o(SGIS_texture_lod
), GLL
, 1997 },
324 { "GL_SUN_multi_draw_arrays", o(dummy_true
), GLL
, 1999 },
331 * Given an extension name, lookup up the corresponding member of struct
332 * gl_extensions and return that member's offset (in bytes). If the name is
333 * not found in the \c extension_table, return 0.
335 * \param name Name of extension.
336 * \return Offset of member in struct gl_extensions.
339 name_to_offset(const char* name
)
341 const struct extension
*i
;
346 for (i
= extension_table
; i
->name
!= 0; ++i
) {
347 if (strcmp(name
, i
->name
) == 0)
356 * \brief Extensions enabled by default.
358 * These extensions are enabled by _mesa_init_extensions().
360 * XXX: Should these defaults also apply to GLES?
362 static const size_t default_extensions
[] = {
364 o(ARB_transpose_matrix
),
367 o(EXT_compiled_vertex_array
),
368 o(EXT_draw_range_elements
),
369 o(EXT_packed_pixels
),
370 o(EXT_rescale_normal
),
371 o(EXT_separate_specular_color
),
374 o(OES_standard_derivatives
),
376 /* Vendor Extensions */
377 o(APPLE_packed_pixels
),
378 o(IBM_multimode_draw_arrays
),
379 o(IBM_rasterpos_clip
),
380 o(NV_light_max_exponent
),
381 o(NV_texgen_reflection
),
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_elements_base_vertex
= GL_TRUE
;
399 ctx
->Extensions
.ARB_draw_instanced
= GL_TRUE
;
400 ctx
->Extensions
.ARB_explicit_attrib_location
= GL_TRUE
;
401 ctx
->Extensions
.ARB_fragment_coord_conventions
= GL_TRUE
;
402 #if FEATURE_ARB_fragment_program
403 ctx
->Extensions
.ARB_fragment_program
= GL_TRUE
;
404 ctx
->Extensions
.ARB_fragment_program_shadow
= GL_TRUE
;
406 #if FEATURE_ARB_fragment_shader
407 ctx
->Extensions
.ARB_fragment_shader
= GL_TRUE
;
409 #if FEATURE_ARB_framebuffer_object
410 ctx
->Extensions
.ARB_framebuffer_object
= GL_TRUE
;
412 #if FEATURE_ARB_geometry_shader4 && 0
413 /* XXX re-enable when GLSL compiler again supports geometry shaders */
414 ctx
->Extensions
.ARB_geometry_shader4
= GL_TRUE
;
416 ctx
->Extensions
.ARB_half_float_pixel
= GL_TRUE
;
417 ctx
->Extensions
.ARB_half_float_vertex
= GL_TRUE
;
418 ctx
->Extensions
.ARB_map_buffer_range
= GL_TRUE
;
420 ctx
->Extensions
.ARB_occlusion_query
= GL_TRUE
;
421 ctx
->Extensions
.ARB_occlusion_query2
= GL_TRUE
;
423 ctx
->Extensions
.ARB_point_sprite
= GL_TRUE
;
424 #if FEATURE_ARB_shader_objects
425 ctx
->Extensions
.ARB_shader_objects
= GL_TRUE
;
426 ctx
->Extensions
.EXT_separate_shader_objects
= GL_TRUE
;
428 #if FEATURE_ARB_shading_language_100
429 ctx
->Extensions
.ARB_shading_language_100
= GL_TRUE
;
431 ctx
->Extensions
.ARB_shadow
= GL_TRUE
;
432 ctx
->Extensions
.ARB_texture_border_clamp
= GL_TRUE
;
433 ctx
->Extensions
.ARB_texture_cube_map
= GL_TRUE
;
434 ctx
->Extensions
.ARB_texture_env_combine
= GL_TRUE
;
435 ctx
->Extensions
.ARB_texture_env_crossbar
= GL_TRUE
;
436 ctx
->Extensions
.ARB_texture_env_dot3
= GL_TRUE
;
437 /*ctx->Extensions.ARB_texture_float = GL_TRUE;*/
438 ctx
->Extensions
.ARB_texture_non_power_of_two
= GL_TRUE
;
439 ctx
->Extensions
.ARB_texture_rg
= GL_TRUE
;
440 ctx
->Extensions
.ARB_texture_compression_rgtc
= GL_TRUE
;
441 ctx
->Extensions
.ARB_texture_storage
= GL_TRUE
;
442 #if FEATURE_ARB_vertex_program
443 ctx
->Extensions
.ARB_vertex_program
= GL_TRUE
;
445 #if FEATURE_ARB_vertex_shader
446 ctx
->Extensions
.ARB_vertex_shader
= GL_TRUE
;
449 ctx
->Extensions
.ARB_sync
= GL_TRUE
;
451 #if FEATURE_APPLE_object_purgeable
452 ctx
->Extensions
.APPLE_object_purgeable
= GL_TRUE
;
454 ctx
->Extensions
.ATI_envmap_bumpmap
= GL_TRUE
;
455 #if FEATURE_ATI_fragment_shader
456 ctx
->Extensions
.ATI_fragment_shader
= GL_TRUE
;
458 ctx
->Extensions
.ATI_texture_compression_3dc
= GL_TRUE
;
459 ctx
->Extensions
.ATI_texture_env_combine3
= GL_TRUE
;
460 ctx
->Extensions
.ATI_texture_mirror_once
= GL_TRUE
;
461 ctx
->Extensions
.ATI_separate_stencil
= GL_TRUE
;
462 ctx
->Extensions
.EXT_blend_color
= GL_TRUE
;
463 ctx
->Extensions
.EXT_blend_equation_separate
= GL_TRUE
;
464 ctx
->Extensions
.EXT_blend_func_separate
= GL_TRUE
;
465 ctx
->Extensions
.EXT_blend_minmax
= GL_TRUE
;
466 ctx
->Extensions
.EXT_depth_bounds_test
= GL_TRUE
;
467 ctx
->Extensions
.EXT_draw_buffers2
= GL_TRUE
;
468 ctx
->Extensions
.EXT_fog_coord
= GL_TRUE
;
469 #if FEATURE_EXT_framebuffer_object
470 ctx
->Extensions
.EXT_framebuffer_object
= GL_TRUE
;
472 #if FEATURE_EXT_framebuffer_blit
473 ctx
->Extensions
.EXT_framebuffer_blit
= GL_TRUE
;
475 #if FEATURE_ARB_framebuffer_object
476 ctx
->Extensions
.EXT_framebuffer_multisample
= GL_TRUE
;
478 ctx
->Extensions
.EXT_packed_depth_stencil
= GL_TRUE
;
479 #if FEATURE_EXT_pixel_buffer_object
480 ctx
->Extensions
.EXT_pixel_buffer_object
= GL_TRUE
;
482 ctx
->Extensions
.EXT_point_parameters
= GL_TRUE
;
483 ctx
->Extensions
.EXT_provoking_vertex
= GL_TRUE
;
484 ctx
->Extensions
.EXT_shadow_funcs
= GL_TRUE
;
485 ctx
->Extensions
.EXT_secondary_color
= GL_TRUE
;
486 ctx
->Extensions
.EXT_stencil_two_side
= GL_TRUE
;
487 ctx
->Extensions
.EXT_texture_array
= GL_TRUE
;
488 ctx
->Extensions
.EXT_texture_compression_latc
= GL_TRUE
;
489 ctx
->Extensions
.EXT_texture_env_dot3
= GL_TRUE
;
490 ctx
->Extensions
.EXT_texture_filter_anisotropic
= GL_TRUE
;
491 ctx
->Extensions
.EXT_texture_mirror_clamp
= GL_TRUE
;
492 ctx
->Extensions
.EXT_texture_shared_exponent
= GL_TRUE
;
493 #if FEATURE_EXT_texture_sRGB
494 ctx
->Extensions
.EXT_texture_sRGB
= GL_TRUE
;
495 ctx
->Extensions
.EXT_texture_sRGB_decode
= GL_TRUE
;
497 ctx
->Extensions
.EXT_texture_swizzle
= GL_TRUE
;
498 #if FEATURE_EXT_transform_feedback
499 /*ctx->Extensions.EXT_transform_feedback = GL_TRUE;*/
501 ctx
->Extensions
.EXT_vertex_array_bgra
= GL_TRUE
;
502 /*ctx->Extensions.IBM_multimode_draw_arrays = GL_TRUE;*/
503 ctx
->Extensions
.MESA_pack_invert
= GL_TRUE
;
504 ctx
->Extensions
.MESA_resize_buffers
= GL_TRUE
;
505 ctx
->Extensions
.MESA_texture_array
= GL_TRUE
;
506 ctx
->Extensions
.MESA_ycbcr_texture
= GL_TRUE
;
507 ctx
->Extensions
.NV_blend_square
= GL_TRUE
;
508 ctx
->Extensions
.NV_conditional_render
= GL_TRUE
;
509 /*ctx->Extensions.NV_light_max_exponent = GL_TRUE;*/
510 ctx
->Extensions
.NV_point_sprite
= GL_TRUE
;
511 ctx
->Extensions
.NV_texture_env_combine4
= GL_TRUE
;
512 ctx
->Extensions
.NV_texture_rectangle
= GL_TRUE
;
513 /*ctx->Extensions.NV_texgen_reflection = GL_TRUE;*/
514 #if FEATURE_NV_vertex_program
515 ctx
->Extensions
.NV_vertex_program
= GL_TRUE
;
516 ctx
->Extensions
.NV_vertex_program1_1
= GL_TRUE
;
518 #if FEATURE_NV_fragment_program
519 ctx
->Extensions
.NV_fragment_program
= GL_TRUE
;
521 #if FEATURE_NV_fragment_program && FEATURE_ARB_fragment_program
522 ctx
->Extensions
.NV_fragment_program_option
= GL_TRUE
;
524 #if FEATURE_ARB_vertex_program || FEATURE_ARB_fragment_program
525 ctx
->Extensions
.EXT_gpu_program_parameters
= GL_TRUE
;
527 #if FEATURE_texture_fxt1
528 _mesa_enable_extension(ctx
, "GL_3DFX_texture_compression_FXT1");
530 #if FEATURE_texture_s3tc
531 if (ctx
->Mesa_DXTn
) {
532 _mesa_enable_extension(ctx
, "GL_EXT_texture_compression_s3tc");
533 _mesa_enable_extension(ctx
, "GL_S3_s3tc");
540 * Enable all OpenGL 1.3 features and extensions.
541 * A convenience function to be called by drivers.
544 _mesa_enable_1_3_extensions(struct gl_context
*ctx
)
546 ctx
->Extensions
.ARB_texture_border_clamp
= GL_TRUE
;
547 ctx
->Extensions
.ARB_texture_cube_map
= GL_TRUE
;
548 ctx
->Extensions
.ARB_texture_env_combine
= GL_TRUE
;
549 ctx
->Extensions
.ARB_texture_env_dot3
= GL_TRUE
;
550 /*ctx->Extensions.ARB_transpose_matrix = GL_TRUE;*/
556 * Enable all OpenGL 1.4 features and extensions.
557 * A convenience function to be called by drivers.
560 _mesa_enable_1_4_extensions(struct gl_context
*ctx
)
562 ctx
->Extensions
.ARB_depth_texture
= GL_TRUE
;
563 ctx
->Extensions
.ARB_shadow
= GL_TRUE
;
564 ctx
->Extensions
.ARB_texture_env_crossbar
= GL_TRUE
;
565 ctx
->Extensions
.ARB_window_pos
= GL_TRUE
;
566 ctx
->Extensions
.EXT_blend_color
= GL_TRUE
;
567 ctx
->Extensions
.EXT_blend_func_separate
= GL_TRUE
;
568 ctx
->Extensions
.EXT_blend_minmax
= GL_TRUE
;
569 ctx
->Extensions
.EXT_fog_coord
= GL_TRUE
;
570 ctx
->Extensions
.EXT_point_parameters
= GL_TRUE
;
571 ctx
->Extensions
.EXT_secondary_color
= GL_TRUE
;
576 * Enable all OpenGL 1.5 features and extensions.
577 * A convenience function to be called by drivers.
580 _mesa_enable_1_5_extensions(struct gl_context
*ctx
)
582 ctx
->Extensions
.ARB_occlusion_query
= GL_TRUE
;
583 ctx
->Extensions
.EXT_shadow_funcs
= GL_TRUE
;
588 * Enable all OpenGL 2.0 features and extensions.
589 * A convenience function to be called by drivers.
592 _mesa_enable_2_0_extensions(struct gl_context
*ctx
)
594 #if FEATURE_ARB_fragment_shader
595 ctx
->Extensions
.ARB_fragment_shader
= GL_TRUE
;
597 ctx
->Extensions
.ARB_point_sprite
= GL_TRUE
;
598 ctx
->Extensions
.EXT_blend_equation_separate
= GL_TRUE
;
599 ctx
->Extensions
.ARB_texture_non_power_of_two
= GL_TRUE
;
600 #if FEATURE_ARB_shader_objects
601 ctx
->Extensions
.ARB_shader_objects
= GL_TRUE
;
603 #if FEATURE_ARB_shading_language_100
604 ctx
->Extensions
.ARB_shading_language_100
= GL_TRUE
;
606 ctx
->Extensions
.EXT_stencil_two_side
= GL_TRUE
;
607 #if FEATURE_ARB_vertex_shader
608 ctx
->Extensions
.ARB_vertex_shader
= GL_TRUE
;
614 * Enable all OpenGL 2.1 features and extensions.
615 * A convenience function to be called by drivers.
618 _mesa_enable_2_1_extensions(struct gl_context
*ctx
)
620 #if FEATURE_EXT_pixel_buffer_object
621 ctx
->Extensions
.EXT_pixel_buffer_object
= GL_TRUE
;
623 #if FEATURE_EXT_texture_sRGB
624 ctx
->Extensions
.EXT_texture_sRGB
= GL_TRUE
;
630 * Either enable or disable the named extension.
631 * \return GL_TRUE for success, GL_FALSE if invalid extension name
634 set_extension( struct gl_context
*ctx
, const char *name
, GLboolean state
)
638 if (ctx
->Extensions
.String
) {
639 /* The string was already queried - can't change it now! */
640 _mesa_problem(ctx
, "Trying to enable/disable extension after glGetString(GL_EXTENSIONS): %s", name
);
644 offset
= name_to_offset(name
);
646 _mesa_problem(ctx
, "Trying to enable/disable unknown extension %s",
649 } else if (offset
== o(dummy_true
) && state
== GL_FALSE
) {
650 _mesa_problem(ctx
, "Trying to disable a permanently enabled extension: "
654 GLboolean
*base
= (GLboolean
*) &ctx
->Extensions
;
655 base
[offset
] = state
;
662 * Enable the named extension.
663 * Typically called by drivers.
666 _mesa_enable_extension( struct gl_context
*ctx
, const char *name
)
668 if (!set_extension(ctx
, name
, GL_TRUE
))
669 _mesa_problem(ctx
, "Trying to enable unknown extension: %s", name
);
674 * Disable the named extension.
675 * XXX is this really needed???
678 _mesa_disable_extension( struct gl_context
*ctx
, const char *name
)
680 if (!set_extension(ctx
, name
, GL_FALSE
))
681 _mesa_problem(ctx
, "Trying to disable unknown extension: %s", name
);
686 * Test if the named extension is enabled in this context.
689 _mesa_extension_is_enabled( struct gl_context
*ctx
, const char *name
)
697 offset
= name_to_offset(name
);
700 base
= (GLboolean
*) &ctx
->Extensions
;
706 * \brief Apply the \c MESA_EXTENSION_OVERRIDE environment variable.
708 * \c MESA_EXTENSION_OVERRIDE is a space-separated list of extensions to
709 * enable or disable. The list is processed thus:
710 * - Enable recognized extension names that are prefixed with '+'.
711 * - Disable recognized extension names that are prefixed with '-'.
712 * - Enable recognized extension names that are not prefixed.
713 * - Collect unrecognized extension names in a new string.
715 * \return Space-separated list of unrecognized extension names (which must
716 * be freed). Does not return \c NULL.
719 get_extension_override( struct gl_context
*ctx
)
721 const char *env_const
= _mesa_getenv("MESA_EXTENSION_OVERRIDE");
727 if (env_const
== NULL
) {
728 /* Return the empty string rather than NULL. This simplifies the logic
729 * of client functions. */
730 return calloc(4, sizeof(char));
733 /* extra_exts: List of unrecognized extensions. */
734 extra_exts
= calloc(ALIGN(strlen(env_const
) + 2, 4), sizeof(char));
736 /* Copy env_const because strtok() is destructive. */
737 env
= strdup(env_const
);
738 for (ext
= strtok(env
, " "); ext
!= NULL
; ext
= strtok(NULL
, " ")) {
754 recognized
= set_extension(ctx
, ext
, enable
);
756 strcat(extra_exts
, ext
);
757 strcat(extra_exts
, " ");
763 /* Remove trailing space. */
764 len
= strlen(extra_exts
);
765 if (len
> 0 && extra_exts
[len
- 1] == ' ')
766 extra_exts
[len
- 1] = '\0';
773 * \brief Initialize extension tables and enable default extensions.
775 * This should be called during context initialization.
776 * Note: Sets gl_extensions.dummy_true to true.
779 _mesa_init_extensions( struct gl_context
*ctx
)
781 GLboolean
*base
= (GLboolean
*) &ctx
->Extensions
;
782 GLboolean
*sentinel
= base
+ o(extension_sentinel
);
786 /* First, turn all extensions off. */
787 for (i
= base
; i
!= sentinel
; ++i
)
790 /* Then, selectively turn default extensions on. */
791 ctx
->Extensions
.dummy_true
= GL_TRUE
;
792 for (j
= default_extensions
; *j
!= 0; ++j
)
797 typedef unsigned short extension_index
;
801 * Compare two entries of the extensions table. Sorts first by year,
804 * Arguments are indices into extension_table.
807 extension_compare(const void *p1
, const void *p2
)
809 extension_index i1
= * (const extension_index
*) p1
;
810 extension_index i2
= * (const extension_index
*) p2
;
811 const struct extension
*e1
= &extension_table
[i1
];
812 const struct extension
*e2
= &extension_table
[i2
];
815 res
= (int)e1
->year
- (int)e2
->year
;
818 res
= strcmp(e1
->name
, e2
->name
);
826 * Construct the GL_EXTENSIONS string. Called the first time that
827 * glGetString(GL_EXTENSIONS) is called.
830 _mesa_make_extension_string(struct gl_context
*ctx
)
832 /* The extension string. */
834 /* Length of extension string. */
836 /* Number of extensions */
838 /* Indices of the extensions sorted by year */
839 extension_index
*extension_indices
;
840 /* String of extra extensions. */
841 char *extra_extensions
= get_extension_override(ctx
);
842 GLboolean
*base
= (GLboolean
*) &ctx
->Extensions
;
843 const struct extension
*i
;
845 unsigned maxYear
= ~0;
847 /* Check if the MESA_EXTENSION_MAX_YEAR env var is set */
849 const char *env
= getenv("MESA_EXTENSION_MAX_YEAR");
852 _mesa_debug(ctx
, "Note: limiting GL extensions to %u or earlier\n",
857 /* Compute length of the extension string. */
859 for (i
= extension_table
; i
->name
!= 0; ++i
) {
860 if (base
[i
->offset
] &&
861 i
->year
<= maxYear
&&
862 (i
->api_set
& (1 << ctx
->API
))) {
863 length
+= strlen(i
->name
) + 1; /* +1 for space */
867 if (extra_extensions
!= NULL
)
868 length
+= 1 + strlen(extra_extensions
); /* +1 for space */
870 exts
= calloc(ALIGN(length
+ 1, 4), sizeof(char));
872 free(extra_extensions
);
876 extension_indices
= malloc(count
* sizeof(extension_index
));
877 if (extension_indices
== NULL
) {
879 free(extra_extensions
);
883 /* Sort extensions in chronological order because certain old applications (e.g.,
884 * Quake3 demo) store the extension list in a static size buffer so chronologically
885 * order ensure that the extensions that such applications expect will fit into
889 for (i
= extension_table
; i
->name
!= 0; ++i
) {
890 if (base
[i
->offset
] &&
891 i
->year
<= maxYear
&&
892 (i
->api_set
& (1 << ctx
->API
))) {
893 extension_indices
[j
++] = i
- extension_table
;
897 qsort(extension_indices
, count
, sizeof *extension_indices
, extension_compare
);
899 /* Build the extension string.*/
900 for (j
= 0; j
< count
; ++j
) {
901 i
= &extension_table
[extension_indices
[j
]];
902 assert(base
[i
->offset
] && (i
->api_set
& (1 << ctx
->API
)));
903 strcat(exts
, i
->name
);
906 free(extension_indices
);
907 if (extra_extensions
!= 0) {
908 strcat(exts
, extra_extensions
);
909 free(extra_extensions
);
912 return (GLubyte
*) exts
;
916 * Return number of enabled extensions.
919 _mesa_get_extension_count(struct gl_context
*ctx
)
922 const struct extension
*i
;
924 /* only count once */
925 if (ctx
->Extensions
.Count
!= 0)
926 return ctx
->Extensions
.Count
;
928 base
= (GLboolean
*) &ctx
->Extensions
;
929 for (i
= extension_table
; i
->name
!= 0; ++i
) {
930 if (base
[i
->offset
] && (i
->api_set
& (1 << ctx
->API
))) {
931 ctx
->Extensions
.Count
++;
934 return ctx
->Extensions
.Count
;
938 * Return name of i-th enabled extension
941 _mesa_get_enabled_extension(struct gl_context
*ctx
, GLuint index
)
943 const GLboolean
*base
;
945 const struct extension
*i
;
947 base
= (GLboolean
*) &ctx
->Extensions
;
949 for (i
= extension_table
; i
->name
!= 0; ++i
) {
950 if (base
[i
->offset
] & (i
->api_set
& (1 << ctx
->API
))) {
952 return (const GLubyte
*) i
->name
;