projects / mesa.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
history | raw | HEAD
mesa: Add extension bit tracking for GL_OES_depth_texture_cube_map
[mesa.git] / src / mesa / main / extensions.c
1 /*
2 * Mesa 3-D graphics library
3 * Version: 7.6
4 *
5 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
6 * Copyright (C) 2009 VMware, Inc. All Rights Reserved.
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
22 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
23 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 */
25
26
27 /**
28 * \file
29 * \brief Extension handling
30 */
31
32
33 #include "glheader.h"
34 #include "imports.h"
35 #include "context.h"
36 #include "extensions.h"
37 #include "macros.h"
38 #include "mfeatures.h"
39 #include "mtypes.h"
40
41 enum {
42 DISABLE = 0,
43 GLL = 1 << API_OPENGL_COMPAT, /* GL Legacy / Compatibility */
44 GLC = 1 << API_OPENGL_CORE, /* GL Core */
45 GL = (1 << API_OPENGL_COMPAT) | (1 << API_OPENGL_CORE),
46 ES1 = 1 << API_OPENGLES,
47 ES2 = 1 << API_OPENGLES2,
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(ARB_shader_objects), GL, 2010 },
104 { "GL_ARB_half_float_pixel", o(ARB_half_float_pixel), GL, 2003 },
105 { "GL_ARB_half_float_vertex", o(ARB_half_float_vertex), GL, 2008 },
106 { "GL_ARB_instanced_arrays", o(ARB_instanced_arrays), GL, 2008 },
107 { "GL_ARB_internalformat_query", o(ARB_internalformat_query), GL, 2011 },
108 { "GL_ARB_invalidate_subdata", o(dummy_true), GL, 2012 },
109 { "GL_ARB_map_buffer_alignment", o(ARB_map_buffer_alignment), GL, 2011 },
110 { "GL_ARB_map_buffer_range", o(ARB_map_buffer_range), GL, 2008 },
111 { "GL_ARB_multisample", o(dummy_true), GLL, 1994 },
112 { "GL_ARB_multitexture", o(dummy_true), GLL, 1998 },
113 { "GL_ARB_occlusion_query2", o(ARB_occlusion_query2), GL, 2003 },
114 { "GL_ARB_occlusion_query", o(ARB_occlusion_query), GLL, 2001 },
115 { "GL_ARB_pixel_buffer_object", o(EXT_pixel_buffer_object), GL, 2004 },
116 { "GL_ARB_point_parameters", o(EXT_point_parameters), GLL, 1997 },
117 { "GL_ARB_point_sprite", o(ARB_point_sprite), GL, 2003 },
118 { "GL_ARB_provoking_vertex", o(EXT_provoking_vertex), GL, 2009 },
119 { "GL_ARB_robustness", o(dummy_true), GL, 2010 },
120 { "GL_ARB_sampler_objects", o(dummy_true), GL, 2009 },
121 { "GL_ARB_seamless_cube_map", o(ARB_seamless_cube_map), GL, 2009 },
122 { "GL_ARB_shader_bit_encoding", o(ARB_shader_bit_encoding), GL, 2010 },
123 { "GL_ARB_shader_objects", o(ARB_shader_objects), GL, 2002 },
124 { "GL_ARB_shader_stencil_export", o(ARB_shader_stencil_export), GL, 2009 },
125 { "GL_ARB_shader_texture_lod", o(ARB_shader_texture_lod), GL, 2009 },
126 { "GL_ARB_shading_language_100", o(ARB_shading_language_100), GLL, 2003 },
127 { "GL_ARB_shadow", o(ARB_shadow), GLL, 2001 },
128 { "GL_ARB_sync", o(ARB_sync), GL, 2003 },
129 { "GL_ARB_texture_border_clamp", o(ARB_texture_border_clamp), GLL, 2000 },
130 { "GL_ARB_texture_buffer_object", o(ARB_texture_buffer_object), GLC, 2008 },
131 { "GL_ARB_texture_buffer_object_rgb32", o(ARB_texture_buffer_object_rgb32), GLC, 2009 },
132 { "GL_ARB_texture_compression", o(dummy_true), GLL, 2000 },
133 { "GL_ARB_texture_compression_rgtc", o(ARB_texture_compression_rgtc), GL, 2004 },
134 { "GL_ARB_texture_cube_map", o(ARB_texture_cube_map), GLL, 1999 },
135 { "GL_ARB_texture_cube_map_array", o(ARB_texture_cube_map_array), GL, 2009 },
136 { "GL_ARB_texture_env_add", o(dummy_true), GLL, 1999 },
137 { "GL_ARB_texture_env_combine", o(ARB_texture_env_combine), GLL, 2001 },
138 { "GL_ARB_texture_env_crossbar", o(ARB_texture_env_crossbar), GLL, 2001 },
139 { "GL_ARB_texture_env_dot3", o(ARB_texture_env_dot3), GLL, 2001 },
140 { "GL_ARB_texture_float", o(ARB_texture_float), GL, 2004 },
141 { "GL_ARB_texture_mirrored_repeat", o(dummy_true), GLL, 2001 },
142 { "GL_ARB_texture_multisample", o(ARB_texture_multisample), GL, 2009 },
143 { "GL_ARB_texture_non_power_of_two", o(ARB_texture_non_power_of_two), GL, 2003 },
144 { "GL_ARB_texture_rectangle", o(NV_texture_rectangle), GL, 2004 },
145 { "GL_ARB_texture_rgb10_a2ui", o(ARB_texture_rgb10_a2ui), GL, 2009 },
146 { "GL_ARB_texture_rg", o(ARB_texture_rg), GL, 2008 },
147 { "GL_ARB_texture_storage", o(ARB_texture_storage), GL, 2011 },
148 { "GL_ARB_texture_swizzle", o(EXT_texture_swizzle), GL, 2008 },
149 { "GL_ARB_timer_query", o(ARB_timer_query), GL, 2010 },
150 { "GL_ARB_transform_feedback2", o(ARB_transform_feedback2), GL, 2010 },
151 { "GL_ARB_transform_feedback3", o(ARB_transform_feedback3), GL, 2010 },
152 { "GL_ARB_transform_feedback_instanced", o(ARB_transform_feedback_instanced), GL, 2011 },
153 { "GL_ARB_transpose_matrix", o(dummy_true), GLL, 1999 },
154 { "GL_ARB_uniform_buffer_object", o(ARB_uniform_buffer_object), GL, 2009 },
155 { "GL_ARB_vertex_array_bgra", o(EXT_vertex_array_bgra), GL, 2008 },
156 { "GL_ARB_vertex_array_object", o(dummy_true), GL, 2006 },
157 { "GL_ARB_vertex_buffer_object", o(dummy_true), GLL, 2003 },
158 { "GL_ARB_vertex_program", o(ARB_vertex_program), GLL, 2002 },
159 { "GL_ARB_vertex_shader", o(ARB_vertex_shader), GL, 2002 },
160 { "GL_ARB_vertex_type_2_10_10_10_rev", o(ARB_vertex_type_2_10_10_10_rev), GL, 2009 },
161 { "GL_ARB_window_pos", o(dummy_true), GLL, 2001 },
162 /* EXT extensions */
163 { "GL_EXT_abgr", o(dummy_true), GL, 1995 },
164 { "GL_EXT_bgra", o(dummy_true), GLL, 1995 },
165 { "GL_EXT_blend_color", o(EXT_blend_color), GLL, 1995 },
166 { "GL_EXT_blend_equation_separate", o(EXT_blend_equation_separate), GL, 2003 },
167 { "GL_EXT_blend_func_separate", o(EXT_blend_func_separate), GLL, 1999 },
168 { "GL_EXT_blend_minmax", o(EXT_blend_minmax), GLL | ES1 | ES2, 1995 },
169 { "GL_EXT_blend_subtract", o(dummy_true), GLL, 1995 },
170 { "GL_EXT_clip_volume_hint", o(EXT_clip_volume_hint), GL, 1996 },
171 { "GL_EXT_compiled_vertex_array", o(dummy_true), GLL, 1996 },
172 { "GL_EXT_copy_texture", o(dummy_true), GLL, 1995 },
173 { "GL_EXT_depth_bounds_test", o(EXT_depth_bounds_test), GL, 2002 },
174 { "GL_EXT_draw_buffers2", o(EXT_draw_buffers2), GL, 2006 },
175 { "GL_EXT_draw_instanced", o(ARB_draw_instanced), GL, 2006 },
176 { "GL_EXT_draw_range_elements", o(dummy_true), GLL, 1997 },
177 { "GL_EXT_fog_coord", o(EXT_fog_coord), GLL, 1999 },
178 { "GL_EXT_framebuffer_blit", o(EXT_framebuffer_blit), GL, 2005 },
179 { "GL_EXT_framebuffer_multisample", o(EXT_framebuffer_multisample), GL, 2005 },
180 { "GL_EXT_framebuffer_object", o(EXT_framebuffer_object), GL, 2000 },
181 { "GL_EXT_framebuffer_sRGB", o(EXT_framebuffer_sRGB), GL, 1998 },
182 { "GL_EXT_gpu_program_parameters", o(EXT_gpu_program_parameters), GLL, 2006 },
183 { "GL_EXT_gpu_shader4", o(EXT_gpu_shader4), GL, 2006 },
184 { "GL_EXT_map_buffer_range", o(ARB_map_buffer_range), ES1 | ES2, 2012 },
185 { "GL_EXT_multi_draw_arrays", o(dummy_true), GLL | ES1 | ES2, 1999 },
186 { "GL_EXT_packed_depth_stencil", o(EXT_packed_depth_stencil), GL, 2005 },
187 { "GL_EXT_packed_float", o(EXT_packed_float), GL, 2004 },
188 { "GL_EXT_packed_pixels", o(dummy_true), GLL, 1997 },
189 { "GL_EXT_pixel_buffer_object", o(EXT_pixel_buffer_object), GL, 2004 },
190 { "GL_EXT_point_parameters", o(EXT_point_parameters), GLL, 1997 },
191 { "GL_EXT_polygon_offset", o(dummy_true), GLL, 1995 },
192 { "GL_EXT_provoking_vertex", o(EXT_provoking_vertex), GL, 2009 },
193 { "GL_EXT_rescale_normal", o(dummy_true), GLL, 1997 },
194 { "GL_EXT_secondary_color", o(EXT_secondary_color), GLL, 1999 },
195 { "GL_EXT_separate_shader_objects", o(EXT_separate_shader_objects), GLL, 2008 },
196 { "GL_EXT_separate_specular_color", o(dummy_true), GLL, 1997 },
197 { "GL_EXT_shadow_funcs", o(EXT_shadow_funcs), GLL, 2002 },
198 { "GL_EXT_stencil_two_side", o(EXT_stencil_two_side), GLL, 2001 },
199 { "GL_EXT_stencil_wrap", o(dummy_true), GLL, 2002 },
200 { "GL_EXT_subtexture", o(dummy_true), GLL, 1995 },
201 { "GL_EXT_texture3D", o(EXT_texture3D), GLL, 1996 },
202 { "GL_EXT_texture_array", o(EXT_texture_array), GL, 2006 },
203 { "GL_EXT_texture_compression_dxt1", o(EXT_texture_compression_s3tc), GL | ES1 | ES2, 2004 },
204 { "GL_ANGLE_texture_compression_dxt3", o(ANGLE_texture_compression_dxt), ES2, 2011 },
205 { "GL_ANGLE_texture_compression_dxt5", o(ANGLE_texture_compression_dxt), ES2, 2011 },
206 { "GL_EXT_texture_compression_latc", o(EXT_texture_compression_latc), GL, 2006 },
207 { "GL_EXT_texture_compression_rgtc", o(ARB_texture_compression_rgtc), GL, 2004 },
208 { "GL_EXT_texture_compression_s3tc", o(EXT_texture_compression_s3tc), GL, 2000 },
209 { "GL_EXT_texture_cube_map", o(ARB_texture_cube_map), GLL, 2001 },
210 { "GL_EXT_texture_edge_clamp", o(dummy_true), GLL, 1997 },
211 { "GL_EXT_texture_env_add", o(dummy_true), GLL, 1999 },
212 { "GL_EXT_texture_env_combine", o(dummy_true), GLL, 2000 },
213 { "GL_EXT_texture_env_dot3", o(EXT_texture_env_dot3), GLL, 2000 },
214 { "GL_EXT_texture_filter_anisotropic", o(EXT_texture_filter_anisotropic), GL | ES1 | ES2, 1999 },
215 { "GL_EXT_texture_format_BGRA8888", o(dummy_true), ES1 | ES2, 2005 },
216 { "GL_EXT_texture_rg", o(ARB_texture_rg), ES2, 2011 },
217 { "GL_EXT_read_format_bgra", o(dummy_true), ES1 | ES2, 2009 },
218 { "GL_EXT_texture_integer", o(EXT_texture_integer), GL, 2006 },
219 { "GL_EXT_texture_lod_bias", o(dummy_true), GLL | ES1, 1999 },
220 { "GL_EXT_texture_mirror_clamp", o(EXT_texture_mirror_clamp), GL, 2004 },
221 { "GL_EXT_texture_object", o(dummy_true), GLL, 1995 },
222 { "GL_EXT_texture", o(dummy_true), GLL, 1996 },
223 { "GL_EXT_texture_rectangle", o(NV_texture_rectangle), GLL, 2004 },
224 { "GL_EXT_texture_shared_exponent", o(EXT_texture_shared_exponent), GL, 2004 },
225 { "GL_EXT_texture_snorm", o(EXT_texture_snorm), GL, 2009 },
226 { "GL_EXT_texture_sRGB", o(EXT_texture_sRGB), GL, 2004 },
227 { "GL_EXT_texture_sRGB_decode", o(EXT_texture_sRGB_decode), GL, 2006 },
228 { "GL_EXT_texture_swizzle", o(EXT_texture_swizzle), GL, 2008 },
229 { "GL_EXT_texture_type_2_10_10_10_REV", o(dummy_true), ES2, 2008 },
230 { "GL_EXT_timer_query", o(EXT_timer_query), GL, 2006 },
231 { "GL_EXT_transform_feedback", o(EXT_transform_feedback), GL, 2011 },
232 { "GL_EXT_unpack_subimage", o(dummy_true), ES2, 2011 },
233 { "GL_EXT_vertex_array_bgra", o(EXT_vertex_array_bgra), GL, 2008 },
234 { "GL_EXT_vertex_array", o(dummy_true), GLL, 1995 },
235
236 /* OES extensions */
237 { "GL_OES_blend_equation_separate", o(EXT_blend_equation_separate), ES1, 2009 },
238 { "GL_OES_blend_func_separate", o(EXT_blend_func_separate), ES1, 2009 },
239 { "GL_OES_blend_subtract", o(dummy_true), ES1, 2009 },
240 { "GL_OES_byte_coordinates", o(dummy_true), ES1, 2002 },
241 { "GL_OES_compressed_ETC1_RGB8_texture", o(OES_compressed_ETC1_RGB8_texture), ES1 | ES2, 2005 },
242 { "GL_OES_compressed_paletted_texture", o(dummy_true), ES1, 2003 },
243 { "GL_OES_depth24", o(EXT_framebuffer_object), ES1 | ES2, 2005 },
244 { "GL_OES_depth32", o(dummy_false), DISABLE, 2005 },
245 { "GL_OES_depth_texture", o(ARB_depth_texture), ES2, 2006 },
246 { "GL_OES_depth_texture_cube_map", o(OES_depth_texture_cube_map), ES2, 2012 },
247 { "GL_OES_draw_texture", o(OES_draw_texture), ES1, 2004 },
248 /* FIXME: Mesa expects GL_OES_EGL_image to be available in OpenGL contexts. */
249 { "GL_OES_EGL_image", o(OES_EGL_image), GL | ES1 | ES2, 2006 },
250 { "GL_OES_EGL_image_external", o(OES_EGL_image_external), ES1 | ES2, 2010 },
251 { "GL_OES_element_index_uint", o(dummy_true), ES1 | ES2, 2005 },
252 { "GL_OES_fbo_render_mipmap", o(EXT_framebuffer_object), ES1 | ES2, 2005 },
253 { "GL_OES_fixed_point", o(dummy_true), ES1, 2002 },
254 { "GL_OES_framebuffer_object", o(EXT_framebuffer_object), ES1, 2005 },
255 { "GL_OES_get_program_binary", o(ARB_shader_objects), ES2, 2008 },
256 { "GL_OES_mapbuffer", o(dummy_true), ES1 | ES2, 2005 },
257 { "GL_OES_matrix_get", o(dummy_true), ES1, 2004 },
258 { "GL_OES_packed_depth_stencil", o(EXT_packed_depth_stencil), ES1 | ES2, 2007 },
259 { "GL_OES_point_size_array", o(dummy_true), ES1, 2004 },
260 { "GL_OES_point_sprite", o(ARB_point_sprite), ES1, 2004 },
261 { "GL_OES_query_matrix", o(dummy_true), ES1, 2003 },
262 { "GL_OES_read_format", o(dummy_true), GL | ES1, 2003 },
263 { "GL_OES_rgb8_rgba8", o(EXT_framebuffer_object), ES1 | ES2, 2005 },
264 { "GL_OES_single_precision", o(dummy_true), ES1, 2003 },
265 { "GL_OES_standard_derivatives", o(OES_standard_derivatives), ES2, 2005 },
266 { "GL_OES_stencil1", o(dummy_false), DISABLE, 2005 },
267 { "GL_OES_stencil4", o(dummy_false), DISABLE, 2005 },
268 { "GL_OES_stencil8", o(EXT_framebuffer_object), ES1 | ES2, 2005 },
269 { "GL_OES_stencil_wrap", o(dummy_true), ES1, 2002 },
270 { "GL_OES_texture_3D", o(EXT_texture3D), ES2, 2005 },
271 { "GL_OES_texture_cube_map", o(ARB_texture_cube_map), ES1, 2007 },
272 { "GL_OES_texture_env_crossbar", o(ARB_texture_env_crossbar), ES1, 2005 },
273 { "GL_OES_texture_mirrored_repeat", o(dummy_true), ES1, 2005 },
274 { "GL_OES_texture_npot", o(ARB_texture_non_power_of_two), ES2, 2005 },
275 { "GL_OES_vertex_array_object", o(dummy_true), ES1 | ES2, 2010 },
276
277 /* Vendor extensions */
278 { "GL_3DFX_texture_compression_FXT1", o(TDFX_texture_compression_FXT1), GL, 1999 },
279 { "GL_AMD_conservative_depth", o(ARB_conservative_depth), GL, 2009 },
280 { "GL_AMD_draw_buffers_blend", o(ARB_draw_buffers_blend), GL, 2009 },
281 { "GL_AMD_seamless_cubemap_per_texture", o(AMD_seamless_cubemap_per_texture), GL, 2009 },
282 { "GL_AMD_shader_stencil_export", o(ARB_shader_stencil_export), GL, 2009 },
283 { "GL_APPLE_object_purgeable", o(APPLE_object_purgeable), GL, 2006 },
284 { "GL_APPLE_packed_pixels", o(dummy_true), GLL, 2002 },
285 { "GL_APPLE_texture_max_level", o(dummy_true), ES1 | ES2, 2009 },
286 { "GL_APPLE_vertex_array_object", o(dummy_true), GLL, 2002 },
287 { "GL_ATI_blend_equation_separate", o(EXT_blend_equation_separate), GL, 2003 },
288 { "GL_ATI_draw_buffers", o(dummy_true), GLL, 2002 },
289 { "GL_ATI_envmap_bumpmap", o(ATI_envmap_bumpmap), GLL, 2001 },
290 { "GL_ATI_fragment_shader", o(ATI_fragment_shader), GLL, 2001 },
291 { "GL_ATI_separate_stencil", o(ATI_separate_stencil), GLL, 2006 },
292 { "GL_ATI_texture_compression_3dc", o(ATI_texture_compression_3dc), GL, 2004 },
293 { "GL_ATI_texture_env_combine3", o(ATI_texture_env_combine3), GLL, 2002 },
294 { "GL_ATI_texture_float", o(ARB_texture_float), GL, 2002 },
295 { "GL_ATI_texture_mirror_once", o(ATI_texture_mirror_once), GL, 2006 },
296 { "GL_IBM_multimode_draw_arrays", o(dummy_true), GL, 1998 },
297 { "GL_IBM_rasterpos_clip", o(dummy_true), GL, 1996 },
298 { "GL_IBM_texture_mirrored_repeat", o(dummy_true), GLL, 1998 },
299 { "GL_INGR_blend_func_separate", o(EXT_blend_func_separate), GLL, 1999 },
300 { "GL_MESA_pack_invert", o(MESA_pack_invert), GL, 2002 },
301 { "GL_MESA_resize_buffers", o(MESA_resize_buffers), GL, 1999 },
302 { "GL_MESA_texture_array", o(MESA_texture_array), GLL, 2007 },
303 { "GL_MESA_texture_signed_rgba", o(EXT_texture_snorm), GL, 2009 },
304 { "GL_MESA_window_pos", o(dummy_true), GLL, 2000 },
305 { "GL_MESA_ycbcr_texture", o(MESA_ycbcr_texture), GL, 2002 },
306 { "GL_NV_blend_square", o(NV_blend_square), GLL, 1999 },
307 { "GL_NV_conditional_render", o(NV_conditional_render), GL, 2008 },
308 { "GL_NV_depth_clamp", o(ARB_depth_clamp), GL, 2001 },
309 { "GL_NV_draw_buffers", o(dummy_true), ES2, 2011 },
310 { "GL_NV_fbo_color_attachments", o(EXT_framebuffer_object), ES2, 2010 },
311 { "GL_NV_fog_distance", o(NV_fog_distance), GLL, 2001 },
312 { "GL_NV_fragment_program_option", o(NV_fragment_program_option), GLL, 2005 },
313 { "GL_NV_light_max_exponent", o(dummy_true), GLL, 1999 },
314 { "GL_NV_packed_depth_stencil", o(EXT_packed_depth_stencil), GL, 2000 },
315 { "GL_NV_point_sprite", o(NV_point_sprite), GL, 2001 },
316 { "GL_NV_primitive_restart", o(NV_primitive_restart), GLL, 2002 },
317 { "GL_NV_read_buffer", o(dummy_true), ES2, 2011 },
318 { "GL_NV_texgen_reflection", o(dummy_true), GLL, 1999 },
319 { "GL_NV_texture_barrier", o(NV_texture_barrier), GL, 2009 },
320 { "GL_NV_texture_env_combine4", o(NV_texture_env_combine4), GLL, 1999 },
321 { "GL_NV_texture_rectangle", o(NV_texture_rectangle), GLL, 2000 },
322 { "GL_S3_s3tc", o(S3_s3tc), GL, 1999 },
323 { "GL_SGIS_generate_mipmap", o(dummy_true), GLL, 1997 },
324 { "GL_SGIS_texture_border_clamp", o(ARB_texture_border_clamp), GLL, 1997 },
325 { "GL_SGIS_texture_edge_clamp", o(dummy_true), GLL, 1997 },
326 { "GL_SGIS_texture_lod", o(dummy_true), GLL, 1997 },
327 { "GL_SUN_multi_draw_arrays", o(dummy_true), GLL, 1999 },
328
329 { 0, 0, 0, 0 },
330 };
331
332
333 /**
334 * Given an extension name, lookup up the corresponding member of struct
335 * gl_extensions and return that member's offset (in bytes). If the name is
336 * not found in the \c extension_table, return 0.
337 *
338 * \param name Name of extension.
339 * \return Offset of member in struct gl_extensions.
340 */
341 static size_t
342 name_to_offset(const char* name)
343 {
344 const struct extension *i;
345
346 if (name == 0)
347 return 0;
348
349 for (i = extension_table; i->name != 0; ++i) {
350 if (strcmp(name, i->name) == 0)
351 return i->offset;
352 }
353
354 return 0;
355 }
356
357
358 /**
359 * Enable all extensions suitable for a software-only renderer.
360 * This is a convenience function used by the XMesa, OSMesa, GGI drivers, etc.
361 */
362 void
363 _mesa_enable_sw_extensions(struct gl_context *ctx)
364 {
365 ctx->Extensions.ARB_depth_clamp = GL_TRUE;
366 ctx->Extensions.ARB_depth_texture = GL_TRUE;
367 ctx->Extensions.ARB_draw_elements_base_vertex = GL_TRUE;
368 ctx->Extensions.ARB_draw_instanced = GL_TRUE;
369 ctx->Extensions.ARB_explicit_attrib_location = GL_TRUE;
370 ctx->Extensions.ARB_fragment_coord_conventions = GL_TRUE;
371 ctx->Extensions.ARB_fragment_program = GL_TRUE;
372 ctx->Extensions.ARB_fragment_program_shadow = GL_TRUE;
373 ctx->Extensions.ARB_fragment_shader = GL_TRUE;
374 ctx->Extensions.ARB_framebuffer_object = GL_TRUE;
375 /* XXX re-enable when GLSL compiler again supports geometry shaders */
376 #if 0
377 ctx->Extensions.ARB_geometry_shader4 = GL_TRUE;
378 #endif
379 ctx->Extensions.ARB_half_float_pixel = GL_TRUE;
380 ctx->Extensions.ARB_half_float_vertex = GL_TRUE;
381 ctx->Extensions.ARB_map_buffer_range = GL_TRUE;
382 ctx->Extensions.ARB_occlusion_query = GL_TRUE;
383 ctx->Extensions.ARB_occlusion_query2 = GL_TRUE;
384 ctx->Extensions.ARB_point_sprite = GL_TRUE;
385 ctx->Extensions.ARB_shader_objects = GL_TRUE;
386 ctx->Extensions.EXT_separate_shader_objects = GL_TRUE;
387 ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
388 ctx->Extensions.ARB_shadow = GL_TRUE;
389 ctx->Extensions.ARB_texture_border_clamp = GL_TRUE;
390 ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
391 ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
392 ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
393 ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
394 /*ctx->Extensions.ARB_texture_float = GL_TRUE;*/
395 ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
396 ctx->Extensions.ARB_texture_rg = GL_TRUE;
397 ctx->Extensions.ARB_texture_compression_rgtc = GL_TRUE;
398 ctx->Extensions.ARB_texture_storage = GL_TRUE;
399 ctx->Extensions.ARB_vertex_program = GL_TRUE;
400 ctx->Extensions.ARB_vertex_shader = GL_TRUE;
401 ctx->Extensions.ARB_sync = GL_TRUE;
402 ctx->Extensions.APPLE_object_purgeable = GL_TRUE;
403 ctx->Extensions.ATI_envmap_bumpmap = GL_TRUE;
404 ctx->Extensions.ATI_fragment_shader = GL_TRUE;
405 ctx->Extensions.ATI_texture_compression_3dc = GL_TRUE;
406 ctx->Extensions.ATI_texture_env_combine3 = GL_TRUE;
407 ctx->Extensions.ATI_texture_mirror_once = GL_TRUE;
408 ctx->Extensions.ATI_separate_stencil = GL_TRUE;
409 ctx->Extensions.EXT_blend_color = GL_TRUE;
410 ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
411 ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
412 ctx->Extensions.EXT_blend_minmax = GL_TRUE;
413 ctx->Extensions.EXT_depth_bounds_test = GL_TRUE;
414 ctx->Extensions.EXT_draw_buffers2 = GL_TRUE;
415 ctx->Extensions.EXT_fog_coord = GL_TRUE;
416 ctx->Extensions.EXT_framebuffer_object = GL_TRUE;
417 ctx->Extensions.EXT_framebuffer_blit = GL_TRUE;
418 ctx->Extensions.EXT_framebuffer_multisample = GL_TRUE;
419 ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE;
420 ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
421 ctx->Extensions.EXT_point_parameters = GL_TRUE;
422 ctx->Extensions.EXT_provoking_vertex = GL_TRUE;
423 ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
424 ctx->Extensions.EXT_secondary_color = GL_TRUE;
425 ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
426 ctx->Extensions.EXT_texture_array = GL_TRUE;
427 ctx->Extensions.EXT_texture_compression_latc = GL_TRUE;
428 ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
429 ctx->Extensions.EXT_texture_filter_anisotropic = GL_TRUE;
430 ctx->Extensions.EXT_texture_mirror_clamp = GL_TRUE;
431 ctx->Extensions.EXT_texture_shared_exponent = GL_TRUE;
432 ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
433 ctx->Extensions.EXT_texture_sRGB_decode = GL_TRUE;
434 ctx->Extensions.EXT_texture_swizzle = GL_TRUE;
435 /*ctx->Extensions.EXT_transform_feedback = GL_TRUE;*/
436 ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE;
437 ctx->Extensions.MESA_pack_invert = GL_TRUE;
438 ctx->Extensions.MESA_resize_buffers = GL_TRUE;
439 ctx->Extensions.MESA_texture_array = GL_TRUE;
440 ctx->Extensions.MESA_ycbcr_texture = GL_TRUE;
441 ctx->Extensions.NV_blend_square = GL_TRUE;
442 ctx->Extensions.NV_conditional_render = GL_TRUE;
443 ctx->Extensions.NV_point_sprite = GL_TRUE;
444 ctx->Extensions.NV_texture_env_combine4 = GL_TRUE;
445 ctx->Extensions.NV_texture_rectangle = GL_TRUE;
446 ctx->Extensions.NV_fragment_program_option = GL_TRUE;
447 ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE;
448 ctx->Extensions.OES_standard_derivatives = GL_TRUE;
449 _mesa_enable_extension(ctx, "GL_3DFX_texture_compression_FXT1");
450 if (ctx->Mesa_DXTn) {
451 ctx->Extensions.ANGLE_texture_compression_dxt = GL_TRUE;
452 _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
453 _mesa_enable_extension(ctx, "GL_S3_s3tc");
454 }
455 }
456
457
458 /**
459 * Enable all OpenGL 1.3 features and extensions.
460 * A convenience function to be called by drivers.
461 */
462 void
463 _mesa_enable_1_3_extensions(struct gl_context *ctx)
464 {
465 ctx->Extensions.ARB_texture_border_clamp = GL_TRUE;
466 ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
467 ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
468 ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
469 }
470
471
472
473 /**
474 * Enable all OpenGL 1.4 features and extensions.
475 * A convenience function to be called by drivers.
476 */
477 void
478 _mesa_enable_1_4_extensions(struct gl_context *ctx)
479 {
480 ctx->Extensions.ARB_depth_texture = GL_TRUE;
481 ctx->Extensions.ARB_shadow = GL_TRUE;
482 ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
483 ctx->Extensions.EXT_blend_color = GL_TRUE;
484 ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
485 ctx->Extensions.EXT_blend_minmax = GL_TRUE;
486 ctx->Extensions.EXT_fog_coord = GL_TRUE;
487 ctx->Extensions.EXT_point_parameters = GL_TRUE;
488 ctx->Extensions.EXT_secondary_color = GL_TRUE;
489 }
490
491
492 /**
493 * Enable all OpenGL 1.5 features and extensions.
494 * A convenience function to be called by drivers.
495 */
496 void
497 _mesa_enable_1_5_extensions(struct gl_context *ctx)
498 {
499 ctx->Extensions.ARB_occlusion_query = GL_TRUE;
500 ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
501 }
502
503
504 /**
505 * Enable all OpenGL 2.0 features and extensions.
506 * A convenience function to be called by drivers.
507 */
508 void
509 _mesa_enable_2_0_extensions(struct gl_context *ctx)
510 {
511 ctx->Extensions.ARB_fragment_shader = GL_TRUE;
512 ctx->Extensions.ARB_point_sprite = GL_TRUE;
513 ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
514 ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
515 ctx->Extensions.ARB_shader_objects = GL_TRUE;
516 ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
517 ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
518 ctx->Extensions.ARB_vertex_shader = GL_TRUE;
519 }
520
521
522 /**
523 * Enable all OpenGL 2.1 features and extensions.
524 * A convenience function to be called by drivers.
525 */
526 void
527 _mesa_enable_2_1_extensions(struct gl_context *ctx)
528 {
529 ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
530 ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
531 }
532
533
534 /**
535 * Either enable or disable the named extension.
536 * \return GL_TRUE for success, GL_FALSE if invalid extension name
537 */
538 static GLboolean
539 set_extension( struct gl_context *ctx, const char *name, GLboolean state )
540 {
541 size_t offset;
542
543 if (ctx->Extensions.String) {
544 /* The string was already queried - can't change it now! */
545 _mesa_problem(ctx, "Trying to enable/disable extension after glGetString(GL_EXTENSIONS): %s", name);
546 return GL_FALSE;
547 }
548
549 offset = name_to_offset(name);
550 if (offset == 0) {
551 _mesa_problem(ctx, "Trying to enable/disable unknown extension %s",
552 name);
553 return GL_FALSE;
554 } else if (offset == o(dummy_true) && state == GL_FALSE) {
555 _mesa_problem(ctx, "Trying to disable a permanently enabled extension: "
556 "%s", name);
557 return GL_FALSE;
558 } else {
559 GLboolean *base = (GLboolean *) &ctx->Extensions;
560 base[offset] = state;
561 return GL_TRUE;
562 }
563 }
564
565
566 /**
567 * Enable the named extension.
568 * Typically called by drivers.
569 */
570 void
571 _mesa_enable_extension( struct gl_context *ctx, const char *name )
572 {
573 if (!set_extension(ctx, name, GL_TRUE))
574 _mesa_problem(ctx, "Trying to enable unknown extension: %s", name);
575 }
576
577
578 /**
579 * Disable the named extension.
580 * XXX is this really needed???
581 */
582 void
583 _mesa_disable_extension( struct gl_context *ctx, const char *name )
584 {
585 if (!set_extension(ctx, name, GL_FALSE))
586 _mesa_problem(ctx, "Trying to disable unknown extension: %s", name);
587 }
588
589
590 /**
591 * Test if the named extension is enabled in this context.
592 */
593 GLboolean
594 _mesa_extension_is_enabled( struct gl_context *ctx, const char *name )
595 {
596 size_t offset;
597 GLboolean *base;
598
599 if (name == 0)
600 return GL_FALSE;
601
602 offset = name_to_offset(name);
603 if (offset == 0)
604 return GL_FALSE;
605 base = (GLboolean *) &ctx->Extensions;
606 return base[offset];
607 }
608
609
610 /**
611 * \brief Apply the \c MESA_EXTENSION_OVERRIDE environment variable.
612 *
613 * \c MESA_EXTENSION_OVERRIDE is a space-separated list of extensions to
614 * enable or disable. The list is processed thus:
615 * - Enable recognized extension names that are prefixed with '+'.
616 * - Disable recognized extension names that are prefixed with '-'.
617 * - Enable recognized extension names that are not prefixed.
618 * - Collect unrecognized extension names in a new string.
619 *
620 * \return Space-separated list of unrecognized extension names (which must
621 * be freed). Does not return \c NULL.
622 */
623 static char *
624 get_extension_override( struct gl_context *ctx )
625 {
626 const char *env_const = _mesa_getenv("MESA_EXTENSION_OVERRIDE");
627 char *env;
628 char *ext;
629 char *extra_exts;
630 int len;
631
632 if (env_const == NULL) {
633 /* Return the empty string rather than NULL. This simplifies the logic
634 * of client functions. */
635 return calloc(4, sizeof(char));
636 }
637
638 /* extra_exts: List of unrecognized extensions. */
639 extra_exts = calloc(ALIGN(strlen(env_const) + 2, 4), sizeof(char));
640
641 /* Copy env_const because strtok() is destructive. */
642 env = strdup(env_const);
643 for (ext = strtok(env, " "); ext != NULL; ext = strtok(NULL, " ")) {
644 int enable;
645 int recognized;
646 switch (ext[0]) {
647 case '+':
648 enable = 1;
649 ++ext;
650 break;
651 case '-':
652 enable = 0;
653 ++ext;
654 break;
655 default:
656 enable = 1;
657 break;
658 }
659 recognized = set_extension(ctx, ext, enable);
660 if (!recognized) {
661 strcat(extra_exts, ext);
662 strcat(extra_exts, " ");
663 }
664 }
665
666 free(env);
667
668 /* Remove trailing space. */
669 len = strlen(extra_exts);
670 if (len > 0 && extra_exts[len - 1] == ' ')
671 extra_exts[len - 1] = '\0';
672
673 return extra_exts;
674 }
675
676
677 /**
678 * \brief Initialize extension tables and enable default extensions.
679 *
680 * This should be called during context initialization.
681 * Note: Sets gl_extensions.dummy_true to true.
682 */
683 void
684 _mesa_init_extensions( struct gl_context *ctx )
685 {
686 GLboolean *base = (GLboolean *) &ctx->Extensions;
687 GLboolean *sentinel = base + o(extension_sentinel);
688 GLboolean *i;
689
690 /* First, turn all extensions off. */
691 for (i = base; i != sentinel; ++i)
692 *i = GL_FALSE;
693
694 /* Then, selectively turn default extensions on. */
695 ctx->Extensions.dummy_true = GL_TRUE;
696 ctx->Extensions.EXT_texture3D = GL_TRUE;
697 }
698
699
700 typedef unsigned short extension_index;
701
702
703 /**
704 * Compare two entries of the extensions table. Sorts first by year,
705 * then by name.
706 *
707 * Arguments are indices into extension_table.
708 */
709 static int
710 extension_compare(const void *p1, const void *p2)
711 {
712 extension_index i1 = * (const extension_index *) p1;
713 extension_index i2 = * (const extension_index *) p2;
714 const struct extension *e1 = &extension_table[i1];
715 const struct extension *e2 = &extension_table[i2];
716 int res;
717
718 res = (int)e1->year - (int)e2->year;
719
720 if (res == 0) {
721 res = strcmp(e1->name, e2->name);
722 }
723
724 return res;
725 }
726
727
728 /**
729 * Construct the GL_EXTENSIONS string. Called the first time that
730 * glGetString(GL_EXTENSIONS) is called.
731 */
732 GLubyte*
733 _mesa_make_extension_string(struct gl_context *ctx)
734 {
735 /* The extension string. */
736 char *exts = 0;
737 /* Length of extension string. */
738 size_t length = 0;
739 /* Number of extensions */
740 unsigned count;
741 /* Indices of the extensions sorted by year */
742 extension_index *extension_indices;
743 /* String of extra extensions. */
744 char *extra_extensions = get_extension_override(ctx);
745 GLboolean *base = (GLboolean *) &ctx->Extensions;
746 const struct extension *i;
747 unsigned j;
748 unsigned maxYear = ~0;
749
750 /* Check if the MESA_EXTENSION_MAX_YEAR env var is set */
751 {
752 const char *env = getenv("MESA_EXTENSION_MAX_YEAR");
753 if (env) {
754 maxYear = atoi(env);
755 _mesa_debug(ctx, "Note: limiting GL extensions to %u or earlier\n",
756 maxYear);
757 }
758 }
759
760 /* Compute length of the extension string. */
761 count = 0;
762 for (i = extension_table; i->name != 0; ++i) {
763 if (base[i->offset] &&
764 i->year <= maxYear &&
765 (i->api_set & (1 << ctx->API))) {
766 length += strlen(i->name) + 1; /* +1 for space */
767 ++count;
768 }
769 }
770 if (extra_extensions != NULL)
771 length += 1 + strlen(extra_extensions); /* +1 for space */
772
773 exts = calloc(ALIGN(length + 1, 4), sizeof(char));
774 if (exts == NULL) {
775 free(extra_extensions);
776 return NULL;
777 }
778
779 extension_indices = malloc(count * sizeof(extension_index));
780 if (extension_indices == NULL) {
781 free(exts);
782 free(extra_extensions);
783 return NULL;
784 }
785
786 /* Sort extensions in chronological order because certain old applications (e.g.,
787 * Quake3 demo) store the extension list in a static size buffer so chronologically
788 * order ensure that the extensions that such applications expect will fit into
789 * that buffer.
790 */
791 j = 0;
792 for (i = extension_table; i->name != 0; ++i) {
793 if (base[i->offset] &&
794 i->year <= maxYear &&
795 (i->api_set & (1 << ctx->API))) {
796 extension_indices[j++] = i - extension_table;
797 }
798 }
799 assert(j == count);
800 qsort(extension_indices, count, sizeof *extension_indices, extension_compare);
801
802 /* Build the extension string.*/
803 for (j = 0; j < count; ++j) {
804 i = &extension_table[extension_indices[j]];
805 assert(base[i->offset] && (i->api_set & (1 << ctx->API)));
806 strcat(exts, i->name);
807 strcat(exts, " ");
808 }
809 free(extension_indices);
810 if (extra_extensions != 0) {
811 strcat(exts, extra_extensions);
812 free(extra_extensions);
813 }
814
815 return (GLubyte *) exts;
816 }
817
818 /**
819 * Return number of enabled extensions.
820 */
821 GLuint
822 _mesa_get_extension_count(struct gl_context *ctx)
823 {
824 GLboolean *base;
825 const struct extension *i;
826
827 /* only count once */
828 if (ctx->Extensions.Count != 0)
829 return ctx->Extensions.Count;
830
831 base = (GLboolean *) &ctx->Extensions;
832 for (i = extension_table; i->name != 0; ++i) {
833 if (base[i->offset] && (i->api_set & (1 << ctx->API))) {
834 ctx->Extensions.Count++;
835 }
836 }
837 return ctx->Extensions.Count;
838 }
839
840 /**
841 * Return name of i-th enabled extension
842 */
843 const GLubyte *
844 _mesa_get_enabled_extension(struct gl_context *ctx, GLuint index)
845 {
846 const GLboolean *base;
847 size_t n;
848 const struct extension *i;
849
850 base = (GLboolean*) &ctx->Extensions;
851 n = 0;
852 for (i = extension_table; i->name != 0; ++i) {
853 if (base[i->offset] && (i->api_set & (1 << ctx->API))) {
854 if (n == index)
855 return (const GLubyte*) i->name;
856 else
857 ++n;
858 }
859 }
860
861 return NULL;
862 }