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