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Add ARB_clear_buffer_object to list of supported extensions
[mesa.git] / src / mesa / main / extensions.c
1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
5 * Copyright (C) 2009 VMware, Inc. All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23 * 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 "macros.h"
38 #include "mtypes.h"
39
40 enum {
41 DISABLE = 0,
42 GLL = 1 << API_OPENGL_COMPAT, /* GL Legacy / Compatibility */
43 GLC = 1 << API_OPENGL_CORE, /* GL Core */
44 GL = (1 << API_OPENGL_COMPAT) | (1 << API_OPENGL_CORE),
45 ES1 = 1 << API_OPENGLES,
46 ES2 = 1 << API_OPENGLES2,
47 ES3 = 1 << (API_OPENGL_LAST + 1),
48 };
49
50 /**
51 * \brief An element of the \c extension_table.
52 */
53 struct extension {
54 /** Name of extension, such as "GL_ARB_depth_clamp". */
55 const char *name;
56
57 /** Offset (in bytes) of the corresponding member in struct gl_extensions. */
58 size_t offset;
59
60 /** Set of API's in which the extension exists, as a bitset. */
61 uint8_t api_set;
62
63 /** Year the extension was proposed or approved. Used to sort the
64 * extension string chronologically. */
65 uint16_t year;
66 };
67
68
69 /**
70 * Given a member \c x of struct gl_extensions, return offset of
71 * \c x in bytes.
72 */
73 #define o(x) offsetof(struct gl_extensions, x)
74
75
76 /**
77 * \brief Table of supported OpenGL extensions for all API's.
78 */
79 static const struct extension extension_table[] = {
80 /* ARB Extensions */
81 { "GL_ARB_ES2_compatibility", o(ARB_ES2_compatibility), GL, 2009 },
82 { "GL_ARB_ES3_compatibility", o(ARB_ES3_compatibility), GL, 2012 },
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_clear_buffer_object", o(dummy_true), GL, 2012 },
86 { "GL_ARB_color_buffer_float", o(ARB_color_buffer_float), GL, 2004 },
87 { "GL_ARB_copy_buffer", o(dummy_true), GL, 2008 },
88 { "GL_ARB_conservative_depth", o(ARB_conservative_depth), GL, 2011 },
89 { "GL_ARB_debug_output", o(dummy_true), GL, 2009 },
90 { "GL_ARB_depth_buffer_float", o(ARB_depth_buffer_float), GL, 2008 },
91 { "GL_ARB_depth_clamp", o(ARB_depth_clamp), GL, 2003 },
92 { "GL_ARB_depth_texture", o(ARB_depth_texture), GLL, 2001 },
93 { "GL_ARB_draw_buffers", o(dummy_true), GL, 2002 },
94 { "GL_ARB_draw_buffers_blend", o(ARB_draw_buffers_blend), GL, 2009 },
95 { "GL_ARB_draw_elements_base_vertex", o(ARB_draw_elements_base_vertex), GL, 2009 },
96 { "GL_ARB_draw_indirect", o(ARB_draw_indirect), GLC, 2010 },
97 { "GL_ARB_draw_instanced", o(ARB_draw_instanced), GL, 2008 },
98 { "GL_ARB_explicit_attrib_location", o(ARB_explicit_attrib_location), GL, 2009 },
99 { "GL_ARB_fragment_coord_conventions", o(ARB_fragment_coord_conventions), GL, 2009 },
100 { "GL_ARB_fragment_program", o(ARB_fragment_program), GLL, 2002 },
101 { "GL_ARB_fragment_program_shadow", o(ARB_fragment_program_shadow), GLL, 2003 },
102 { "GL_ARB_fragment_shader", o(ARB_fragment_shader), GL, 2002 },
103 { "GL_ARB_framebuffer_object", o(ARB_framebuffer_object), GL, 2005 },
104 { "GL_ARB_framebuffer_sRGB", o(EXT_framebuffer_sRGB), GL, 1998 },
105 { "GL_ARB_get_program_binary", o(dummy_true), GL, 2010 },
106 { "GL_ARB_gpu_shader5", o(ARB_gpu_shader5), GL, 2010 },
107 { "GL_ARB_half_float_pixel", o(ARB_half_float_pixel), GL, 2003 },
108 { "GL_ARB_half_float_vertex", o(ARB_half_float_vertex), GL, 2008 },
109 { "GL_ARB_instanced_arrays", o(ARB_instanced_arrays), GL, 2008 },
110 { "GL_ARB_internalformat_query", o(ARB_internalformat_query), GL, 2011 },
111 { "GL_ARB_invalidate_subdata", o(dummy_true), GL, 2012 },
112 { "GL_ARB_map_buffer_alignment", o(ARB_map_buffer_alignment), GL, 2011 },
113 { "GL_ARB_map_buffer_range", o(ARB_map_buffer_range), GL, 2008 },
114 { "GL_ARB_multi_draw_indirect", o(ARB_draw_indirect), GLC, 2012 },
115 { "GL_ARB_multisample", o(dummy_true), GLL, 1994 },
116 { "GL_ARB_multitexture", o(dummy_true), GLL, 1998 },
117 { "GL_ARB_occlusion_query2", o(ARB_occlusion_query2), GL, 2003 },
118 { "GL_ARB_occlusion_query", o(ARB_occlusion_query), GLL, 2001 },
119 { "GL_ARB_pixel_buffer_object", o(EXT_pixel_buffer_object), GL, 2004 },
120 { "GL_ARB_point_parameters", o(EXT_point_parameters), GLL, 1997 },
121 { "GL_ARB_point_sprite", o(ARB_point_sprite), GL, 2003 },
122 { "GL_ARB_provoking_vertex", o(EXT_provoking_vertex), GL, 2009 },
123 { "GL_ARB_robustness", o(dummy_true), GL, 2010 },
124 { "GL_ARB_sample_shading", o(ARB_sample_shading), GL, 2009 },
125 { "GL_ARB_sampler_objects", o(dummy_true), GL, 2009 },
126 { "GL_ARB_seamless_cube_map", o(ARB_seamless_cube_map), GL, 2009 },
127 { "GL_ARB_shader_atomic_counters", o(ARB_shader_atomic_counters), GL, 2011 },
128 { "GL_ARB_shader_bit_encoding", o(ARB_shader_bit_encoding), GL, 2010 },
129 { "GL_ARB_shader_objects", o(dummy_true), GL, 2002 },
130 { "GL_ARB_shader_stencil_export", o(ARB_shader_stencil_export), GL, 2009 },
131 { "GL_ARB_shader_texture_lod", o(ARB_shader_texture_lod), GL, 2009 },
132 { "GL_ARB_shading_language_100", o(dummy_true), GLL, 2003 },
133 { "GL_ARB_shading_language_packing", o(ARB_shading_language_packing), GL, 2011 },
134 { "GL_ARB_shading_language_420pack", o(ARB_shading_language_420pack), GL, 2011 },
135 { "GL_ARB_shadow", o(ARB_shadow), GLL, 2001 },
136 { "GL_ARB_sync", o(ARB_sync), GL, 2003 },
137 { "GL_ARB_texture_border_clamp", o(ARB_texture_border_clamp), GLL, 2000 },
138 { "GL_ARB_texture_buffer_object", o(ARB_texture_buffer_object), GLC, 2008 },
139 { "GL_ARB_texture_buffer_object_rgb32", o(ARB_texture_buffer_object_rgb32), GLC, 2009 },
140 { "GL_ARB_texture_buffer_range", o(ARB_texture_buffer_range), GLC, 2012 },
141 { "GL_ARB_texture_compression", o(dummy_true), GLL, 2000 },
142 { "GL_ARB_texture_compression_rgtc", o(ARB_texture_compression_rgtc), GL, 2004 },
143 { "GL_ARB_texture_cube_map", o(ARB_texture_cube_map), GLL, 1999 },
144 { "GL_ARB_texture_cube_map_array", o(ARB_texture_cube_map_array), GL, 2009 },
145 { "GL_ARB_texture_env_add", o(dummy_true), GLL, 1999 },
146 { "GL_ARB_texture_env_combine", o(ARB_texture_env_combine), GLL, 2001 },
147 { "GL_ARB_texture_env_crossbar", o(ARB_texture_env_crossbar), GLL, 2001 },
148 { "GL_ARB_texture_env_dot3", o(ARB_texture_env_dot3), GLL, 2001 },
149 { "GL_ARB_texture_float", o(ARB_texture_float), GL, 2004 },
150 { "GL_ARB_texture_gather", o(ARB_texture_gather), GL, 2009 },
151 { "GL_ARB_texture_mirrored_repeat", o(dummy_true), GLL, 2001 },
152 { "GL_ARB_texture_mirror_clamp_to_edge", o(ARB_texture_mirror_clamp_to_edge), GL, 2013 },
153 { "GL_ARB_texture_multisample", o(ARB_texture_multisample), GL, 2009 },
154 { "GL_ARB_texture_non_power_of_two", o(ARB_texture_non_power_of_two), GL, 2003 },
155 { "GL_ARB_texture_query_levels", o(ARB_texture_query_levels), GL, 2012 },
156 { "GL_ARB_texture_query_lod", o(ARB_texture_query_lod), GL, 2009 },
157 { "GL_ARB_texture_rectangle", o(NV_texture_rectangle), GL, 2004 },
158 { "GL_ARB_texture_rgb10_a2ui", o(ARB_texture_rgb10_a2ui), GL, 2009 },
159 { "GL_ARB_texture_rg", o(ARB_texture_rg), GL, 2008 },
160 { "GL_ARB_texture_storage", o(dummy_true), GL, 2011 },
161 { "GL_ARB_texture_storage_multisample", o(ARB_texture_multisample), GL, 2012 },
162 { "GL_ARB_texture_view", o(ARB_texture_view), GL, 2012 },
163 { "GL_ARB_texture_swizzle", o(EXT_texture_swizzle), GL, 2008 },
164 { "GL_ARB_timer_query", o(ARB_timer_query), GL, 2010 },
165 { "GL_ARB_transform_feedback2", o(ARB_transform_feedback2), GL, 2010 },
166 { "GL_ARB_transform_feedback3", o(ARB_transform_feedback3), GL, 2010 },
167 { "GL_ARB_transform_feedback_instanced", o(ARB_transform_feedback_instanced), GL, 2011 },
168 { "GL_ARB_transpose_matrix", o(dummy_true), GLL, 1999 },
169 { "GL_ARB_uniform_buffer_object", o(ARB_uniform_buffer_object), GL, 2009 },
170 { "GL_ARB_vertex_array_bgra", o(EXT_vertex_array_bgra), GL, 2008 },
171 { "GL_ARB_vertex_array_object", o(dummy_true), GL, 2006 },
172 { "GL_ARB_vertex_attrib_binding", o(dummy_true), GL, 2012 },
173 { "GL_ARB_vertex_buffer_object", o(dummy_true), GLL, 2003 },
174 { "GL_ARB_vertex_program", o(ARB_vertex_program), GLL, 2002 },
175 { "GL_ARB_vertex_shader", o(ARB_vertex_shader), GL, 2002 },
176 { "GL_ARB_vertex_type_10f_11f_11f_rev", o(ARB_vertex_type_10f_11f_11f_rev), GL, 2013 },
177 { "GL_ARB_vertex_type_2_10_10_10_rev", o(ARB_vertex_type_2_10_10_10_rev), GL, 2009 },
178 { "GL_ARB_window_pos", o(dummy_true), GLL, 2001 },
179 /* EXT extensions */
180 { "GL_EXT_abgr", o(dummy_true), GL, 1995 },
181 { "GL_EXT_bgra", o(dummy_true), GLL, 1995 },
182 { "GL_EXT_blend_color", o(EXT_blend_color), GLL, 1995 },
183 { "GL_EXT_blend_equation_separate", o(EXT_blend_equation_separate), GL, 2003 },
184 { "GL_EXT_blend_func_separate", o(EXT_blend_func_separate), GLL, 1999 },
185 { "GL_EXT_discard_framebuffer", o(dummy_true), ES1 | ES2, 2009 },
186 { "GL_EXT_blend_minmax", o(EXT_blend_minmax), GLL | ES1 | ES2, 1995 },
187 { "GL_EXT_blend_subtract", o(dummy_true), GLL, 1995 },
188 { "GL_EXT_compiled_vertex_array", o(dummy_true), GLL, 1996 },
189 { "GL_EXT_copy_texture", o(dummy_true), GLL, 1995 },
190 { "GL_EXT_depth_bounds_test", o(EXT_depth_bounds_test), GL, 2002 },
191 { "GL_EXT_draw_buffers2", o(EXT_draw_buffers2), GL, 2006 },
192 { "GL_EXT_draw_instanced", o(ARB_draw_instanced), GL, 2006 },
193 { "GL_EXT_draw_range_elements", o(dummy_true), GLL, 1997 },
194 { "GL_EXT_fog_coord", o(dummy_true), GLL, 1999 },
195 { "GL_EXT_framebuffer_blit", o(EXT_framebuffer_blit), GL, 2005 },
196 { "GL_EXT_framebuffer_multisample", o(EXT_framebuffer_multisample), GL, 2005 },
197 { "GL_EXT_framebuffer_multisample_blit_scaled", o(EXT_framebuffer_multisample_blit_scaled), GL, 2011 },
198 { "GL_EXT_framebuffer_object", o(dummy_true), GLL, 2000 },
199 { "GL_EXT_framebuffer_sRGB", o(EXT_framebuffer_sRGB), GL, 1998 },
200 { "GL_EXT_gpu_program_parameters", o(EXT_gpu_program_parameters), GLL, 2006 },
201 { "GL_EXT_gpu_shader4", o(EXT_gpu_shader4), GL, 2006 },
202 { "GL_EXT_map_buffer_range", o(ARB_map_buffer_range), ES1 | ES2, 2012 },
203 { "GL_EXT_multi_draw_arrays", o(dummy_true), GLL | ES1 | ES2, 1999 },
204 { "GL_EXT_packed_depth_stencil", o(EXT_packed_depth_stencil), GL, 2005 },
205 { "GL_EXT_packed_float", o(EXT_packed_float), GL, 2004 },
206 { "GL_EXT_packed_pixels", o(dummy_true), GLL, 1997 },
207 { "GL_EXT_pixel_buffer_object", o(EXT_pixel_buffer_object), GL, 2004 },
208 { "GL_EXT_point_parameters", o(EXT_point_parameters), GLL, 1997 },
209 { "GL_EXT_polygon_offset", o(dummy_true), GLL, 1995 },
210 { "GL_EXT_provoking_vertex", o(EXT_provoking_vertex), GL, 2009 },
211 { "GL_EXT_rescale_normal", o(dummy_true), GLL, 1997 },
212 { "GL_EXT_secondary_color", o(dummy_true), GLL, 1999 },
213 { "GL_EXT_separate_shader_objects", o(EXT_separate_shader_objects), GLL, 2008 },
214 { "GL_EXT_separate_specular_color", o(dummy_true), GLL, 1997 },
215 { "GL_EXT_shader_integer_mix", o(EXT_shader_integer_mix), GL | ES3, 2013 },
216 { "GL_EXT_shadow_funcs", o(ARB_shadow), GLL, 2002 },
217 { "GL_EXT_stencil_two_side", o(EXT_stencil_two_side), GLL, 2001 },
218 { "GL_EXT_stencil_wrap", o(dummy_true), GLL, 2002 },
219 { "GL_EXT_subtexture", o(dummy_true), GLL, 1995 },
220 { "GL_EXT_texture3D", o(EXT_texture3D), GLL, 1996 },
221 { "GL_EXT_texture_array", o(EXT_texture_array), GL, 2006 },
222 { "GL_EXT_texture_compression_dxt1", o(ANGLE_texture_compression_dxt), GL | ES1 | ES2, 2004 },
223 { "GL_ANGLE_texture_compression_dxt3", o(ANGLE_texture_compression_dxt), GL | ES1 | ES2, 2011 },
224 { "GL_ANGLE_texture_compression_dxt5", o(ANGLE_texture_compression_dxt), GL | ES1 | ES2, 2011 },
225 { "GL_EXT_texture_compression_latc", o(EXT_texture_compression_latc), GL, 2006 },
226 { "GL_EXT_texture_compression_rgtc", o(ARB_texture_compression_rgtc), GL, 2004 },
227 { "GL_EXT_texture_compression_s3tc", o(EXT_texture_compression_s3tc), GL, 2000 },
228 { "GL_EXT_texture_cube_map", o(ARB_texture_cube_map), GLL, 2001 },
229 { "GL_EXT_texture_edge_clamp", o(dummy_true), GLL, 1997 },
230 { "GL_EXT_texture_env_add", o(dummy_true), GLL, 1999 },
231 { "GL_EXT_texture_env_combine", o(dummy_true), GLL, 2000 },
232 { "GL_EXT_texture_env_dot3", o(EXT_texture_env_dot3), GLL, 2000 },
233 { "GL_EXT_texture_filter_anisotropic", o(EXT_texture_filter_anisotropic), GL | ES1 | ES2, 1999 },
234 { "GL_EXT_texture_format_BGRA8888", o(dummy_true), ES1 | ES2, 2005 },
235 { "GL_EXT_texture_rg", o(ARB_texture_rg), ES2, 2011 },
236 { "GL_EXT_read_format_bgra", o(dummy_true), ES1 | ES2, 2009 },
237 { "GL_EXT_texture_integer", o(EXT_texture_integer), GL, 2006 },
238 { "GL_EXT_texture_lod_bias", o(dummy_true), GLL | ES1, 1999 },
239 { "GL_EXT_texture_mirror_clamp", o(EXT_texture_mirror_clamp), GL, 2004 },
240 { "GL_EXT_texture_object", o(dummy_true), GLL, 1995 },
241 { "GL_EXT_texture", o(dummy_true), GLL, 1996 },
242 { "GL_EXT_texture_rectangle", o(NV_texture_rectangle), GLL, 2004 },
243 { "GL_EXT_texture_shared_exponent", o(EXT_texture_shared_exponent), GL, 2004 },
244 { "GL_EXT_texture_snorm", o(EXT_texture_snorm), GL, 2009 },
245 { "GL_EXT_texture_sRGB", o(EXT_texture_sRGB), GL, 2004 },
246 { "GL_EXT_texture_sRGB_decode", o(EXT_texture_sRGB_decode), GL, 2006 },
247 { "GL_EXT_texture_swizzle", o(EXT_texture_swizzle), GL, 2008 },
248 { "GL_EXT_texture_type_2_10_10_10_REV", o(dummy_true), ES2, 2008 },
249 { "GL_EXT_timer_query", o(EXT_timer_query), GL, 2006 },
250 { "GL_EXT_transform_feedback", o(EXT_transform_feedback), GL, 2011 },
251 { "GL_EXT_unpack_subimage", o(dummy_true), ES2, 2011 },
252 { "GL_EXT_vertex_array_bgra", o(EXT_vertex_array_bgra), GL, 2008 },
253 { "GL_EXT_vertex_array", o(dummy_true), GLL, 1995 },
254 { "GL_EXT_color_buffer_float", o(dummy_true), ES3, 2013 },
255
256 /* OES extensions */
257 { "GL_OES_blend_equation_separate", o(EXT_blend_equation_separate), ES1, 2009 },
258 { "GL_OES_blend_func_separate", o(EXT_blend_func_separate), ES1, 2009 },
259 { "GL_OES_blend_subtract", o(dummy_true), ES1, 2009 },
260 { "GL_OES_byte_coordinates", o(dummy_true), ES1, 2002 },
261 { "GL_OES_compressed_ETC1_RGB8_texture", o(OES_compressed_ETC1_RGB8_texture), ES1 | ES2, 2005 },
262 { "GL_OES_compressed_paletted_texture", o(dummy_true), ES1, 2003 },
263 { "GL_OES_depth24", o(dummy_true), ES1 | ES2, 2005 },
264 { "GL_OES_depth32", o(dummy_false), DISABLE, 2005 },
265 { "GL_OES_depth_texture", o(ARB_depth_texture), ES2, 2006 },
266 { "GL_OES_depth_texture_cube_map", o(OES_depth_texture_cube_map), ES2, 2012 },
267 { "GL_OES_draw_texture", o(OES_draw_texture), ES1, 2004 },
268 /* FIXME: Mesa expects GL_OES_EGL_image to be available in OpenGL contexts. */
269 { "GL_OES_EGL_image", o(OES_EGL_image), GL | ES1 | ES2, 2006 },
270 { "GL_OES_EGL_image_external", o(OES_EGL_image_external), ES1 | ES2, 2010 },
271 { "GL_OES_element_index_uint", o(dummy_true), ES1 | ES2, 2005 },
272 { "GL_OES_fbo_render_mipmap", o(dummy_true), ES1 | ES2, 2005 },
273 { "GL_OES_fixed_point", o(dummy_true), ES1, 2002 },
274 { "GL_OES_framebuffer_object", o(dummy_true), ES1, 2005 },
275 { "GL_OES_get_program_binary", o(dummy_true), ES2, 2008 },
276 { "GL_OES_mapbuffer", o(dummy_true), ES1 | ES2, 2005 },
277 { "GL_OES_packed_depth_stencil", o(EXT_packed_depth_stencil), ES1 | ES2, 2007 },
278 { "GL_OES_point_size_array", o(dummy_true), ES1, 2004 },
279 { "GL_OES_point_sprite", o(ARB_point_sprite), ES1, 2004 },
280 { "GL_OES_query_matrix", o(dummy_true), ES1, 2003 },
281 { "GL_OES_read_format", o(dummy_true), GL | ES1, 2003 },
282 { "GL_OES_rgb8_rgba8", o(dummy_true), ES1 | ES2, 2005 },
283 { "GL_OES_single_precision", o(dummy_true), ES1, 2003 },
284 { "GL_OES_standard_derivatives", o(OES_standard_derivatives), ES2, 2005 },
285 { "GL_OES_stencil1", o(dummy_false), DISABLE, 2005 },
286 { "GL_OES_stencil4", o(dummy_false), DISABLE, 2005 },
287 { "GL_OES_stencil8", o(dummy_true), ES1 | ES2, 2005 },
288 { "GL_OES_stencil_wrap", o(dummy_true), ES1, 2002 },
289 { "GL_OES_surfaceless_context", o(dummy_true), ES1 | ES2, 2012 },
290 { "GL_OES_texture_3D", o(EXT_texture3D), ES2, 2005 },
291 { "GL_OES_texture_cube_map", o(ARB_texture_cube_map), ES1, 2007 },
292 { "GL_OES_texture_env_crossbar", o(ARB_texture_env_crossbar), ES1, 2005 },
293 { "GL_OES_texture_mirrored_repeat", o(dummy_true), ES1, 2005 },
294 { "GL_OES_texture_npot", o(ARB_texture_non_power_of_two), ES1 | ES2, 2005 },
295 { "GL_OES_vertex_array_object", o(dummy_true), ES1 | ES2, 2010 },
296
297 /* KHR extensions */
298 { "GL_KHR_debug", o(dummy_true), GL, 2012 },
299
300 /* Vendor extensions */
301 { "GL_3DFX_texture_compression_FXT1", o(TDFX_texture_compression_FXT1), GL, 1999 },
302 { "GL_AMD_conservative_depth", o(ARB_conservative_depth), GL, 2009 },
303 { "GL_AMD_draw_buffers_blend", o(ARB_draw_buffers_blend), GL, 2009 },
304 { "GL_AMD_performance_monitor", o(AMD_performance_monitor), GL, 2007 },
305 { "GL_AMD_seamless_cubemap_per_texture", o(AMD_seamless_cubemap_per_texture), GL, 2009 },
306 { "GL_AMD_shader_stencil_export", o(ARB_shader_stencil_export), GL, 2009 },
307 { "GL_AMD_vertex_shader_layer", o(AMD_vertex_shader_layer), GLC, 2012 },
308 { "GL_APPLE_object_purgeable", o(APPLE_object_purgeable), GL, 2006 },
309 { "GL_APPLE_packed_pixels", o(dummy_true), GLL, 2002 },
310 { "GL_APPLE_texture_max_level", o(dummy_true), ES1 | ES2, 2009 },
311 { "GL_APPLE_vertex_array_object", o(dummy_true), GLL, 2002 },
312 { "GL_ATI_blend_equation_separate", o(EXT_blend_equation_separate), GL, 2003 },
313 { "GL_ATI_draw_buffers", o(dummy_true), GLL, 2002 },
314 { "GL_ATI_envmap_bumpmap", o(ATI_envmap_bumpmap), GLL, 2001 },
315 { "GL_ATI_fragment_shader", o(ATI_fragment_shader), GLL, 2001 },
316 { "GL_ATI_separate_stencil", o(ATI_separate_stencil), GLL, 2006 },
317 { "GL_ATI_texture_compression_3dc", o(ATI_texture_compression_3dc), GL, 2004 },
318 { "GL_ATI_texture_env_combine3", o(ATI_texture_env_combine3), GLL, 2002 },
319 { "GL_ATI_texture_float", o(ARB_texture_float), GL, 2002 },
320 { "GL_ATI_texture_mirror_once", o(ATI_texture_mirror_once), GL, 2006 },
321 { "GL_IBM_multimode_draw_arrays", o(dummy_true), GL, 1998 },
322 { "GL_IBM_rasterpos_clip", o(dummy_true), GLL, 1996 },
323 { "GL_IBM_texture_mirrored_repeat", o(dummy_true), GLL, 1998 },
324 { "GL_INGR_blend_func_separate", o(EXT_blend_func_separate), GLL, 1999 },
325 { "GL_MESA_pack_invert", o(MESA_pack_invert), GL, 2002 },
326 { "GL_MESA_texture_signed_rgba", o(EXT_texture_snorm), GL, 2009 },
327 { "GL_MESA_window_pos", o(dummy_true), GLL, 2000 },
328 { "GL_MESA_ycbcr_texture", o(MESA_ycbcr_texture), GL, 2002 },
329 { "GL_NV_blend_square", o(dummy_true), GLL, 1999 },
330 { "GL_NV_conditional_render", o(NV_conditional_render), GL, 2008 },
331 { "GL_NV_depth_clamp", o(ARB_depth_clamp), GL, 2001 },
332 { "GL_NV_draw_buffers", o(dummy_true), ES2, 2011 },
333 { "GL_NV_fbo_color_attachments", o(dummy_true), ES2, 2010 },
334 { "GL_NV_fog_distance", o(NV_fog_distance), GLL, 2001 },
335 { "GL_NV_fragment_program_option", o(NV_fragment_program_option), GLL, 2005 },
336 { "GL_NV_light_max_exponent", o(dummy_true), GLL, 1999 },
337 { "GL_NV_packed_depth_stencil", o(EXT_packed_depth_stencil), GL, 2000 },
338 { "GL_NV_point_sprite", o(NV_point_sprite), GL, 2001 },
339 { "GL_NV_primitive_restart", o(NV_primitive_restart), GLL, 2002 },
340 { "GL_NV_read_buffer", o(dummy_true), ES2, 2011 },
341 { "GL_NV_texgen_reflection", o(dummy_true), GLL, 1999 },
342 { "GL_NV_texture_barrier", o(NV_texture_barrier), GL, 2009 },
343 { "GL_NV_texture_env_combine4", o(NV_texture_env_combine4), GLL, 1999 },
344 { "GL_NV_texture_rectangle", o(NV_texture_rectangle), GLL, 2000 },
345 { "GL_NV_vdpau_interop", o(NV_vdpau_interop), GL, 2010 },
346 { "GL_S3_s3tc", o(ANGLE_texture_compression_dxt), GL, 1999 },
347 { "GL_SGIS_generate_mipmap", o(dummy_true), GLL, 1997 },
348 { "GL_SGIS_texture_border_clamp", o(ARB_texture_border_clamp), GLL, 1997 },
349 { "GL_SGIS_texture_edge_clamp", o(dummy_true), GLL, 1997 },
350 { "GL_SGIS_texture_lod", o(dummy_true), GLL, 1997 },
351 { "GL_SUN_multi_draw_arrays", o(dummy_true), GLL, 1999 },
352
353 { 0, 0, 0, 0 },
354 };
355
356
357 /**
358 * Given an extension name, lookup up the corresponding member of struct
359 * gl_extensions and return that member's offset (in bytes). If the name is
360 * not found in the \c extension_table, return 0.
361 *
362 * \param name Name of extension.
363 * \return Offset of member in struct gl_extensions.
364 */
365 static size_t
366 name_to_offset(const char* name)
367 {
368 const struct extension *i;
369
370 if (name == 0)
371 return 0;
372
373 for (i = extension_table; i->name != 0; ++i) {
374 if (strcmp(name, i->name) == 0)
375 return i->offset;
376 }
377
378 return 0;
379 }
380
381
382 /**
383 * Enable all extensions suitable for a software-only renderer.
384 * This is a convenience function used by the XMesa, OSMesa, GGI drivers, etc.
385 */
386 void
387 _mesa_enable_sw_extensions(struct gl_context *ctx)
388 {
389 ctx->Extensions.ARB_depth_clamp = GL_TRUE;
390 ctx->Extensions.ARB_depth_texture = GL_TRUE;
391 ctx->Extensions.ARB_draw_elements_base_vertex = GL_TRUE;
392 ctx->Extensions.ARB_draw_instanced = GL_TRUE;
393 ctx->Extensions.ARB_explicit_attrib_location = GL_TRUE;
394 ctx->Extensions.ARB_fragment_coord_conventions = GL_TRUE;
395 ctx->Extensions.ARB_fragment_program = GL_TRUE;
396 ctx->Extensions.ARB_fragment_program_shadow = GL_TRUE;
397 ctx->Extensions.ARB_fragment_shader = GL_TRUE;
398 ctx->Extensions.ARB_framebuffer_object = GL_TRUE;
399 /* XXX re-enable when GLSL compiler again supports geometry shaders */
400 #if 0
401 ctx->Extensions.ARB_geometry_shader4 = GL_TRUE;
402 #endif
403 ctx->Extensions.ARB_half_float_pixel = GL_TRUE;
404 ctx->Extensions.ARB_half_float_vertex = GL_TRUE;
405 ctx->Extensions.ARB_map_buffer_range = GL_TRUE;
406 ctx->Extensions.ARB_occlusion_query = GL_TRUE;
407 ctx->Extensions.ARB_occlusion_query2 = GL_TRUE;
408 ctx->Extensions.ARB_point_sprite = GL_TRUE;
409 ctx->Extensions.EXT_separate_shader_objects = GL_TRUE;
410 ctx->Extensions.ARB_shadow = GL_TRUE;
411 ctx->Extensions.ARB_texture_border_clamp = GL_TRUE;
412 ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
413 ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
414 ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
415 ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
416 #ifdef TEXTURE_FLOAT_ENABLED
417 ctx->Extensions.ARB_texture_float = GL_TRUE;
418 #endif
419 ctx->Extensions.ARB_texture_mirror_clamp_to_edge = GL_TRUE;
420 ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
421 ctx->Extensions.ARB_texture_rg = GL_TRUE;
422 ctx->Extensions.ARB_texture_compression_rgtc = GL_TRUE;
423 ctx->Extensions.ARB_vertex_program = GL_TRUE;
424 ctx->Extensions.ARB_vertex_shader = GL_TRUE;
425 ctx->Extensions.ARB_sync = GL_TRUE;
426 ctx->Extensions.APPLE_object_purgeable = GL_TRUE;
427 ctx->Extensions.ATI_envmap_bumpmap = GL_TRUE;
428 ctx->Extensions.ATI_fragment_shader = GL_TRUE;
429 ctx->Extensions.ATI_texture_compression_3dc = GL_TRUE;
430 ctx->Extensions.ATI_texture_env_combine3 = GL_TRUE;
431 ctx->Extensions.ATI_texture_mirror_once = GL_TRUE;
432 ctx->Extensions.ATI_separate_stencil = GL_TRUE;
433 ctx->Extensions.EXT_blend_color = GL_TRUE;
434 ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
435 ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
436 ctx->Extensions.EXT_blend_minmax = GL_TRUE;
437 ctx->Extensions.EXT_depth_bounds_test = GL_TRUE;
438 ctx->Extensions.EXT_draw_buffers2 = GL_TRUE;
439 ctx->Extensions.EXT_framebuffer_blit = GL_TRUE;
440 ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE;
441 ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
442 ctx->Extensions.EXT_point_parameters = GL_TRUE;
443 ctx->Extensions.EXT_provoking_vertex = GL_TRUE;
444 ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
445 ctx->Extensions.EXT_texture_array = GL_TRUE;
446 ctx->Extensions.EXT_texture_compression_latc = GL_TRUE;
447 ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
448 ctx->Extensions.EXT_texture_filter_anisotropic = GL_TRUE;
449 ctx->Extensions.EXT_texture_mirror_clamp = GL_TRUE;
450 ctx->Extensions.EXT_texture_shared_exponent = GL_TRUE;
451 ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
452 ctx->Extensions.EXT_texture_sRGB_decode = GL_TRUE;
453 ctx->Extensions.EXT_texture_swizzle = GL_TRUE;
454 /*ctx->Extensions.EXT_transform_feedback = GL_TRUE;*/
455 ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE;
456 ctx->Extensions.MESA_pack_invert = GL_TRUE;
457 ctx->Extensions.MESA_ycbcr_texture = GL_TRUE;
458 ctx->Extensions.NV_conditional_render = GL_TRUE;
459 ctx->Extensions.NV_point_sprite = GL_TRUE;
460 ctx->Extensions.NV_texture_env_combine4 = GL_TRUE;
461 ctx->Extensions.NV_texture_rectangle = GL_TRUE;
462 ctx->Extensions.NV_fragment_program_option = GL_TRUE;
463 ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE;
464 ctx->Extensions.OES_standard_derivatives = GL_TRUE;
465 ctx->Extensions.TDFX_texture_compression_FXT1 = GL_TRUE;
466 if (ctx->Mesa_DXTn) {
467 ctx->Extensions.ANGLE_texture_compression_dxt = GL_TRUE;
468 ctx->Extensions.EXT_texture_compression_s3tc = GL_TRUE;
469 }
470 }
471
472 /**
473 * Either enable or disable the named extension.
474 * \return GL_TRUE for success, GL_FALSE if invalid extension name
475 */
476 static GLboolean
477 set_extension( struct gl_context *ctx, const char *name, GLboolean state )
478 {
479 size_t offset;
480
481 if (ctx->Extensions.String) {
482 /* The string was already queried - can't change it now! */
483 _mesa_problem(ctx, "Trying to enable/disable extension after glGetString(GL_EXTENSIONS): %s", name);
484 return GL_FALSE;
485 }
486
487 offset = name_to_offset(name);
488 if (offset == 0) {
489 _mesa_problem(ctx, "Trying to enable/disable unknown extension %s",
490 name);
491 return GL_FALSE;
492 } else if (offset == o(dummy_true) && state == GL_FALSE) {
493 _mesa_problem(ctx, "Trying to disable a permanently enabled extension: "
494 "%s", name);
495 return GL_FALSE;
496 } else {
497 GLboolean *base = (GLboolean *) &ctx->Extensions;
498 base[offset] = state;
499 return GL_TRUE;
500 }
501 }
502
503 /**
504 * \brief Apply the \c MESA_EXTENSION_OVERRIDE environment variable.
505 *
506 * \c MESA_EXTENSION_OVERRIDE is a space-separated list of extensions to
507 * enable or disable. The list is processed thus:
508 * - Enable recognized extension names that are prefixed with '+'.
509 * - Disable recognized extension names that are prefixed with '-'.
510 * - Enable recognized extension names that are not prefixed.
511 * - Collect unrecognized extension names in a new string.
512 *
513 * \return Space-separated list of unrecognized extension names (which must
514 * be freed). Does not return \c NULL.
515 */
516 static char *
517 get_extension_override( struct gl_context *ctx )
518 {
519 const char *env_const = _mesa_getenv("MESA_EXTENSION_OVERRIDE");
520 char *env;
521 char *ext;
522 char *extra_exts;
523 int len;
524
525 if (env_const == NULL) {
526 /* Return the empty string rather than NULL. This simplifies the logic
527 * of client functions. */
528 return calloc(4, sizeof(char));
529 }
530
531 /* extra_exts: List of unrecognized extensions. */
532 extra_exts = calloc(ALIGN(strlen(env_const) + 2, 4), sizeof(char));
533
534 /* Copy env_const because strtok() is destructive. */
535 env = strdup(env_const);
536 for (ext = strtok(env, " "); ext != NULL; ext = strtok(NULL, " ")) {
537 int enable;
538 int recognized;
539 switch (ext[0]) {
540 case '+':
541 enable = 1;
542 ++ext;
543 break;
544 case '-':
545 enable = 0;
546 ++ext;
547 break;
548 default:
549 enable = 1;
550 break;
551 }
552 recognized = set_extension(ctx, ext, enable);
553 if (!recognized) {
554 strcat(extra_exts, ext);
555 strcat(extra_exts, " ");
556 }
557 }
558
559 free(env);
560
561 /* Remove trailing space. */
562 len = strlen(extra_exts);
563 if (len > 0 && extra_exts[len - 1] == ' ')
564 extra_exts[len - 1] = '\0';
565
566 return extra_exts;
567 }
568
569
570 /**
571 * \brief Initialize extension tables and enable default extensions.
572 *
573 * This should be called during context initialization.
574 * Note: Sets gl_extensions.dummy_true to true.
575 */
576 void
577 _mesa_init_extensions( struct gl_context *ctx )
578 {
579 GLboolean *base = (GLboolean *) &ctx->Extensions;
580 GLboolean *sentinel = base + o(extension_sentinel);
581 GLboolean *i;
582
583 /* First, turn all extensions off. */
584 for (i = base; i != sentinel; ++i)
585 *i = GL_FALSE;
586
587 /* Then, selectively turn default extensions on. */
588 ctx->Extensions.dummy_true = GL_TRUE;
589 ctx->Extensions.EXT_texture3D = GL_TRUE;
590 }
591
592
593 typedef unsigned short extension_index;
594
595
596 /**
597 * Compare two entries of the extensions table. Sorts first by year,
598 * then by name.
599 *
600 * Arguments are indices into extension_table.
601 */
602 static int
603 extension_compare(const void *p1, const void *p2)
604 {
605 extension_index i1 = * (const extension_index *) p1;
606 extension_index i2 = * (const extension_index *) p2;
607 const struct extension *e1 = &extension_table[i1];
608 const struct extension *e2 = &extension_table[i2];
609 int res;
610
611 res = (int)e1->year - (int)e2->year;
612
613 if (res == 0) {
614 res = strcmp(e1->name, e2->name);
615 }
616
617 return res;
618 }
619
620
621 /**
622 * Construct the GL_EXTENSIONS string. Called the first time that
623 * glGetString(GL_EXTENSIONS) is called.
624 */
625 GLubyte*
626 _mesa_make_extension_string(struct gl_context *ctx)
627 {
628 /* The extension string. */
629 char *exts = 0;
630 /* Length of extension string. */
631 size_t length = 0;
632 /* Number of extensions */
633 unsigned count;
634 /* Indices of the extensions sorted by year */
635 extension_index *extension_indices;
636 /* String of extra extensions. */
637 char *extra_extensions = get_extension_override(ctx);
638 GLboolean *base = (GLboolean *) &ctx->Extensions;
639 const struct extension *i;
640 unsigned j;
641 unsigned maxYear = ~0;
642 unsigned api_set = (1 << ctx->API);
643 if (_mesa_is_gles3(ctx))
644 api_set |= ES3;
645
646 /* Check if the MESA_EXTENSION_MAX_YEAR env var is set */
647 {
648 const char *env = getenv("MESA_EXTENSION_MAX_YEAR");
649 if (env) {
650 maxYear = atoi(env);
651 _mesa_debug(ctx, "Note: limiting GL extensions to %u or earlier\n",
652 maxYear);
653 }
654 }
655
656 /* Compute length of the extension string. */
657 count = 0;
658 for (i = extension_table; i->name != 0; ++i) {
659 if (base[i->offset] &&
660 i->year <= maxYear &&
661 (i->api_set & api_set)) {
662 length += strlen(i->name) + 1; /* +1 for space */
663 ++count;
664 }
665 }
666 if (extra_extensions != NULL)
667 length += 1 + strlen(extra_extensions); /* +1 for space */
668
669 exts = calloc(ALIGN(length + 1, 4), sizeof(char));
670 if (exts == NULL) {
671 free(extra_extensions);
672 return NULL;
673 }
674
675 extension_indices = malloc(count * sizeof(extension_index));
676 if (extension_indices == NULL) {
677 free(exts);
678 free(extra_extensions);
679 return NULL;
680 }
681
682 /* Sort extensions in chronological order because certain old applications (e.g.,
683 * Quake3 demo) store the extension list in a static size buffer so chronologically
684 * order ensure that the extensions that such applications expect will fit into
685 * that buffer.
686 */
687 j = 0;
688 for (i = extension_table; i->name != 0; ++i) {
689 if (base[i->offset] &&
690 i->year <= maxYear &&
691 (i->api_set & api_set)) {
692 extension_indices[j++] = i - extension_table;
693 }
694 }
695 assert(j == count);
696 qsort(extension_indices, count, sizeof *extension_indices, extension_compare);
697
698 /* Build the extension string.*/
699 for (j = 0; j < count; ++j) {
700 i = &extension_table[extension_indices[j]];
701 assert(base[i->offset] && (i->api_set & api_set));
702 strcat(exts, i->name);
703 strcat(exts, " ");
704 }
705 free(extension_indices);
706 if (extra_extensions != 0) {
707 strcat(exts, extra_extensions);
708 free(extra_extensions);
709 }
710
711 return (GLubyte *) exts;
712 }
713
714 /**
715 * Return number of enabled extensions.
716 */
717 GLuint
718 _mesa_get_extension_count(struct gl_context *ctx)
719 {
720 GLboolean *base;
721 const struct extension *i;
722 unsigned api_set = (1 << ctx->API);
723 if (_mesa_is_gles3(ctx))
724 api_set |= ES3;
725
726 /* only count once */
727 if (ctx->Extensions.Count != 0)
728 return ctx->Extensions.Count;
729
730 base = (GLboolean *) &ctx->Extensions;
731 for (i = extension_table; i->name != 0; ++i) {
732 if (base[i->offset] && (i->api_set & api_set)) {
733 ctx->Extensions.Count++;
734 }
735 }
736 return ctx->Extensions.Count;
737 }
738
739 /**
740 * Return name of i-th enabled extension
741 */
742 const GLubyte *
743 _mesa_get_enabled_extension(struct gl_context *ctx, GLuint index)
744 {
745 const GLboolean *base;
746 size_t n;
747 const struct extension *i;
748 unsigned api_set = (1 << ctx->API);
749 if (_mesa_is_gles3(ctx))
750 api_set |= ES3;
751
752 base = (GLboolean*) &ctx->Extensions;
753 n = 0;
754 for (i = extension_table; i->name != 0; ++i) {
755 if (base[i->offset] && (i->api_set & api_set)) {
756 if (n == index)
757 return (const GLubyte*) i->name;
758 else
759 ++n;
760 }
761 }
762
763 return NULL;
764 }