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mesa: don't enable GL_EXT_framebuffer_multisample for software drivers
[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 ES3 = 1 << (API_OPENGL_LAST + 1),
49 };
50
51 /**
52 * \brief An element of the \c extension_table.
53 */
54 struct extension {
55 /** Name of extension, such as "GL_ARB_depth_clamp". */
56 const char *name;
57
58 /** Offset (in bytes) of the corresponding member in struct gl_extensions. */
59 size_t offset;
60
61 /** Set of API's in which the extension exists, as a bitset. */
62 uint8_t api_set;
63
64 /** Year the extension was proposed or approved. Used to sort the
65 * extension string chronologically. */
66 uint16_t year;
67 };
68
69
70 /**
71 * Given a member \c x of struct gl_extensions, return offset of
72 * \c x in bytes.
73 */
74 #define o(x) offsetof(struct gl_extensions, x)
75
76
77 /**
78 * \brief Table of supported OpenGL extensions for all API's.
79 */
80 static const struct extension extension_table[] = {
81 /* ARB Extensions */
82 { "GL_ARB_ES2_compatibility", o(ARB_ES2_compatibility), GL, 2009 },
83 { "GL_ARB_ES3_compatibility", o(ARB_ES3_compatibility), GL, 2012 },
84 { "GL_ARB_base_instance", o(ARB_base_instance), GL, 2011 },
85 { "GL_ARB_blend_func_extended", o(ARB_blend_func_extended), GL, 2009 },
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_instanced", o(ARB_draw_instanced), GL, 2008 },
97 { "GL_ARB_explicit_attrib_location", o(ARB_explicit_attrib_location), GL, 2009 },
98 { "GL_ARB_fragment_coord_conventions", o(ARB_fragment_coord_conventions), GL, 2009 },
99 { "GL_ARB_fragment_program", o(ARB_fragment_program), GLL, 2002 },
100 { "GL_ARB_fragment_program_shadow", o(ARB_fragment_program_shadow), GLL, 2003 },
101 { "GL_ARB_fragment_shader", o(ARB_fragment_shader), GL, 2002 },
102 { "GL_ARB_framebuffer_object", o(ARB_framebuffer_object), GL, 2005 },
103 { "GL_ARB_framebuffer_sRGB", o(EXT_framebuffer_sRGB), GL, 1998 },
104 { "GL_ARB_get_program_binary", o(ARB_shader_objects), 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(ARB_shader_objects), 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(ARB_shading_language_100), GLL, 2003 },
128 { "GL_ARB_shading_language_packing", o(ARB_shading_language_packing), GL, 2011 },
129 { "GL_ARB_shadow", o(ARB_shadow), GLL, 2001 },
130 { "GL_ARB_sync", o(ARB_sync), GL, 2003 },
131 { "GL_ARB_texture_border_clamp", o(ARB_texture_border_clamp), GLL, 2000 },
132 { "GL_ARB_texture_buffer_object", o(ARB_texture_buffer_object), GLC, 2008 },
133 { "GL_ARB_texture_buffer_object_rgb32", o(ARB_texture_buffer_object_rgb32), GLC, 2009 },
134 { "GL_ARB_texture_compression", o(dummy_true), GLL, 2000 },
135 { "GL_ARB_texture_compression_rgtc", o(ARB_texture_compression_rgtc), GL, 2004 },
136 { "GL_ARB_texture_cube_map", o(ARB_texture_cube_map), GLL, 1999 },
137 { "GL_ARB_texture_cube_map_array", o(ARB_texture_cube_map_array), GL, 2009 },
138 { "GL_ARB_texture_env_add", o(dummy_true), GLL, 1999 },
139 { "GL_ARB_texture_env_combine", o(ARB_texture_env_combine), GLL, 2001 },
140 { "GL_ARB_texture_env_crossbar", o(ARB_texture_env_crossbar), GLL, 2001 },
141 { "GL_ARB_texture_env_dot3", o(ARB_texture_env_dot3), GLL, 2001 },
142 { "GL_ARB_texture_float", o(ARB_texture_float), GL, 2004 },
143 { "GL_ARB_texture_mirrored_repeat", o(dummy_true), GLL, 2001 },
144 { "GL_ARB_texture_multisample", o(ARB_texture_multisample), GL, 2009 },
145 { "GL_ARB_texture_non_power_of_two", o(ARB_texture_non_power_of_two), GL, 2003 },
146 { "GL_ARB_texture_rectangle", o(NV_texture_rectangle), GL, 2004 },
147 { "GL_ARB_texture_rgb10_a2ui", o(ARB_texture_rgb10_a2ui), GL, 2009 },
148 { "GL_ARB_texture_rg", o(ARB_texture_rg), GL, 2008 },
149 { "GL_ARB_texture_storage", o(ARB_texture_storage), GL, 2011 },
150 { "GL_ARB_texture_swizzle", o(EXT_texture_swizzle), GL, 2008 },
151 { "GL_ARB_timer_query", o(ARB_timer_query), GL, 2010 },
152 { "GL_ARB_transform_feedback2", o(ARB_transform_feedback2), GL, 2010 },
153 { "GL_ARB_transform_feedback3", o(ARB_transform_feedback3), GL, 2010 },
154 { "GL_ARB_transform_feedback_instanced", o(ARB_transform_feedback_instanced), GL, 2011 },
155 { "GL_ARB_transpose_matrix", o(dummy_true), GLL, 1999 },
156 { "GL_ARB_uniform_buffer_object", o(ARB_uniform_buffer_object), GL, 2009 },
157 { "GL_ARB_vertex_array_bgra", o(EXT_vertex_array_bgra), GL, 2008 },
158 { "GL_ARB_vertex_array_object", o(dummy_true), GL, 2006 },
159 { "GL_ARB_vertex_buffer_object", o(dummy_true), GLL, 2003 },
160 { "GL_ARB_vertex_program", o(ARB_vertex_program), GLL, 2002 },
161 { "GL_ARB_vertex_shader", o(ARB_vertex_shader), GL, 2002 },
162 { "GL_ARB_vertex_type_2_10_10_10_rev", o(ARB_vertex_type_2_10_10_10_rev), GL, 2009 },
163 { "GL_ARB_window_pos", o(dummy_true), GLL, 2001 },
164 /* EXT extensions */
165 { "GL_EXT_abgr", o(dummy_true), GL, 1995 },
166 { "GL_EXT_bgra", o(dummy_true), GLL, 1995 },
167 { "GL_EXT_blend_color", o(EXT_blend_color), GLL, 1995 },
168 { "GL_EXT_blend_equation_separate", o(EXT_blend_equation_separate), GL, 2003 },
169 { "GL_EXT_blend_func_separate", o(EXT_blend_func_separate), GLL, 1999 },
170 { "GL_EXT_blend_minmax", o(EXT_blend_minmax), GLL | ES1 | ES2, 1995 },
171 { "GL_EXT_blend_subtract", o(dummy_true), GLL, 1995 },
172 { "GL_EXT_clip_volume_hint", o(EXT_clip_volume_hint), GL, 1996 },
173 { "GL_EXT_compiled_vertex_array", o(dummy_true), GLL, 1996 },
174 { "GL_EXT_copy_texture", o(dummy_true), GLL, 1995 },
175 { "GL_EXT_depth_bounds_test", o(EXT_depth_bounds_test), GL, 2002 },
176 { "GL_EXT_draw_buffers2", o(EXT_draw_buffers2), GL, 2006 },
177 { "GL_EXT_draw_instanced", o(ARB_draw_instanced), GL, 2006 },
178 { "GL_EXT_draw_range_elements", o(dummy_true), GLL, 1997 },
179 { "GL_EXT_fog_coord", o(EXT_fog_coord), GLL, 1999 },
180 { "GL_EXT_framebuffer_blit", o(EXT_framebuffer_blit), GL, 2005 },
181 { "GL_EXT_framebuffer_multisample", o(EXT_framebuffer_multisample), GL, 2005 },
182 { "GL_EXT_framebuffer_object", o(EXT_framebuffer_object), GL, 2000 },
183 { "GL_EXT_framebuffer_sRGB", o(EXT_framebuffer_sRGB), GL, 1998 },
184 { "GL_EXT_gpu_program_parameters", o(EXT_gpu_program_parameters), GLL, 2006 },
185 { "GL_EXT_gpu_shader4", o(EXT_gpu_shader4), GL, 2006 },
186 { "GL_EXT_map_buffer_range", o(ARB_map_buffer_range), ES1 | ES2, 2012 },
187 { "GL_EXT_multi_draw_arrays", o(dummy_true), GLL | ES1 | ES2, 1999 },
188 { "GL_EXT_packed_depth_stencil", o(EXT_packed_depth_stencil), GL, 2005 },
189 { "GL_EXT_packed_float", o(EXT_packed_float), GL, 2004 },
190 { "GL_EXT_packed_pixels", o(dummy_true), GLL, 1997 },
191 { "GL_EXT_pixel_buffer_object", o(EXT_pixel_buffer_object), GL, 2004 },
192 { "GL_EXT_point_parameters", o(EXT_point_parameters), GLL, 1997 },
193 { "GL_EXT_polygon_offset", o(dummy_true), GLL, 1995 },
194 { "GL_EXT_provoking_vertex", o(EXT_provoking_vertex), GL, 2009 },
195 { "GL_EXT_rescale_normal", o(dummy_true), GLL, 1997 },
196 { "GL_EXT_secondary_color", o(EXT_secondary_color), GLL, 1999 },
197 { "GL_EXT_separate_shader_objects", o(EXT_separate_shader_objects), GLL, 2008 },
198 { "GL_EXT_separate_specular_color", o(dummy_true), GLL, 1997 },
199 { "GL_EXT_shadow_funcs", o(EXT_shadow_funcs), GLL, 2002 },
200 { "GL_EXT_stencil_two_side", o(EXT_stencil_two_side), GLL, 2001 },
201 { "GL_EXT_stencil_wrap", o(dummy_true), GLL, 2002 },
202 { "GL_EXT_subtexture", o(dummy_true), GLL, 1995 },
203 { "GL_EXT_texture3D", o(EXT_texture3D), GLL, 1996 },
204 { "GL_EXT_texture_array", o(EXT_texture_array), GL, 2006 },
205 { "GL_EXT_texture_compression_dxt1", o(ANGLE_texture_compression_dxt), GL | ES1 | ES2, 2004 },
206 { "GL_ANGLE_texture_compression_dxt3", o(ANGLE_texture_compression_dxt), GL | ES1 | ES2, 2011 },
207 { "GL_ANGLE_texture_compression_dxt5", o(ANGLE_texture_compression_dxt), GL | ES1 | ES2, 2011 },
208 { "GL_EXT_texture_compression_latc", o(EXT_texture_compression_latc), GL, 2006 },
209 { "GL_EXT_texture_compression_rgtc", o(ARB_texture_compression_rgtc), GL, 2004 },
210 { "GL_EXT_texture_compression_s3tc", o(EXT_texture_compression_s3tc), GL, 2000 },
211 { "GL_EXT_texture_cube_map", o(ARB_texture_cube_map), GLL, 2001 },
212 { "GL_EXT_texture_edge_clamp", o(dummy_true), GLL, 1997 },
213 { "GL_EXT_texture_env_add", o(dummy_true), GLL, 1999 },
214 { "GL_EXT_texture_env_combine", o(dummy_true), GLL, 2000 },
215 { "GL_EXT_texture_env_dot3", o(EXT_texture_env_dot3), GLL, 2000 },
216 { "GL_EXT_texture_filter_anisotropic", o(EXT_texture_filter_anisotropic), GL | ES1 | ES2, 1999 },
217 { "GL_EXT_texture_format_BGRA8888", o(dummy_true), ES1 | ES2, 2005 },
218 { "GL_EXT_texture_rg", o(ARB_texture_rg), ES2, 2011 },
219 { "GL_EXT_read_format_bgra", o(dummy_true), ES1 | ES2, 2009 },
220 { "GL_EXT_texture_integer", o(EXT_texture_integer), GL, 2006 },
221 { "GL_EXT_texture_lod_bias", o(dummy_true), GLL | ES1, 1999 },
222 { "GL_EXT_texture_mirror_clamp", o(EXT_texture_mirror_clamp), GL, 2004 },
223 { "GL_EXT_texture_object", o(dummy_true), GLL, 1995 },
224 { "GL_EXT_texture", o(dummy_true), GLL, 1996 },
225 { "GL_EXT_texture_rectangle", o(NV_texture_rectangle), GLL, 2004 },
226 { "GL_EXT_texture_shared_exponent", o(EXT_texture_shared_exponent), GL, 2004 },
227 { "GL_EXT_texture_snorm", o(EXT_texture_snorm), GL, 2009 },
228 { "GL_EXT_texture_sRGB", o(EXT_texture_sRGB), GL, 2004 },
229 { "GL_EXT_texture_sRGB_decode", o(EXT_texture_sRGB_decode), GL, 2006 },
230 { "GL_EXT_texture_swizzle", o(EXT_texture_swizzle), GL, 2008 },
231 { "GL_EXT_texture_type_2_10_10_10_REV", o(dummy_true), ES2, 2008 },
232 { "GL_EXT_timer_query", o(EXT_timer_query), GL, 2006 },
233 { "GL_EXT_transform_feedback", o(EXT_transform_feedback), GL, 2011 },
234 { "GL_EXT_unpack_subimage", o(dummy_true), ES2, 2011 },
235 { "GL_EXT_vertex_array_bgra", o(EXT_vertex_array_bgra), GL, 2008 },
236 { "GL_EXT_vertex_array", o(dummy_true), GLL, 1995 },
237 { "GL_EXT_color_buffer_float", o(dummy_true), ES3, 2013 },
238
239 /* OES extensions */
240 { "GL_OES_blend_equation_separate", o(EXT_blend_equation_separate), ES1, 2009 },
241 { "GL_OES_blend_func_separate", o(EXT_blend_func_separate), ES1, 2009 },
242 { "GL_OES_blend_subtract", o(dummy_true), ES1, 2009 },
243 { "GL_OES_byte_coordinates", o(dummy_true), ES1, 2002 },
244 { "GL_OES_compressed_ETC1_RGB8_texture", o(OES_compressed_ETC1_RGB8_texture), ES1 | ES2, 2005 },
245 { "GL_OES_compressed_paletted_texture", o(dummy_true), ES1, 2003 },
246 { "GL_OES_depth24", o(EXT_framebuffer_object), ES1 | ES2, 2005 },
247 { "GL_OES_depth32", o(dummy_false), DISABLE, 2005 },
248 { "GL_OES_depth_texture", o(ARB_depth_texture), ES2, 2006 },
249 { "GL_OES_depth_texture_cube_map", o(OES_depth_texture_cube_map), ES2, 2012 },
250 { "GL_OES_draw_texture", o(OES_draw_texture), ES1, 2004 },
251 /* FIXME: Mesa expects GL_OES_EGL_image to be available in OpenGL contexts. */
252 { "GL_OES_EGL_image", o(OES_EGL_image), GL | ES1 | ES2, 2006 },
253 { "GL_OES_EGL_image_external", o(OES_EGL_image_external), ES1 | ES2, 2010 },
254 { "GL_OES_element_index_uint", o(dummy_true), ES1 | ES2, 2005 },
255 { "GL_OES_fbo_render_mipmap", o(EXT_framebuffer_object), ES1 | ES2, 2005 },
256 { "GL_OES_fixed_point", o(dummy_true), ES1, 2002 },
257 { "GL_OES_framebuffer_object", o(EXT_framebuffer_object), ES1, 2005 },
258 { "GL_OES_get_program_binary", o(ARB_shader_objects), ES2, 2008 },
259 { "GL_OES_mapbuffer", o(dummy_true), ES1 | ES2, 2005 },
260 { "GL_OES_matrix_get", o(dummy_true), ES1, 2004 },
261 { "GL_OES_packed_depth_stencil", o(EXT_packed_depth_stencil), ES1 | ES2, 2007 },
262 { "GL_OES_point_size_array", o(dummy_true), ES1, 2004 },
263 { "GL_OES_point_sprite", o(ARB_point_sprite), ES1, 2004 },
264 { "GL_OES_query_matrix", o(dummy_true), ES1, 2003 },
265 { "GL_OES_read_format", o(dummy_true), GL | ES1, 2003 },
266 { "GL_OES_rgb8_rgba8", o(EXT_framebuffer_object), ES1 | ES2, 2005 },
267 { "GL_OES_single_precision", o(dummy_true), ES1, 2003 },
268 { "GL_OES_standard_derivatives", o(OES_standard_derivatives), ES2, 2005 },
269 { "GL_OES_stencil1", o(dummy_false), DISABLE, 2005 },
270 { "GL_OES_stencil4", o(dummy_false), DISABLE, 2005 },
271 { "GL_OES_stencil8", o(EXT_framebuffer_object), ES1 | ES2, 2005 },
272 { "GL_OES_stencil_wrap", o(dummy_true), ES1, 2002 },
273 { "GL_OES_texture_3D", o(EXT_texture3D), ES2, 2005 },
274 { "GL_OES_texture_cube_map", o(ARB_texture_cube_map), ES1, 2007 },
275 { "GL_OES_texture_env_crossbar", o(ARB_texture_env_crossbar), ES1, 2005 },
276 { "GL_OES_texture_mirrored_repeat", o(dummy_true), ES1, 2005 },
277 { "GL_OES_texture_npot", o(ARB_texture_non_power_of_two), ES2, 2005 },
278 { "GL_OES_vertex_array_object", o(dummy_true), ES1 | ES2, 2010 },
279
280 /* Vendor extensions */
281 { "GL_3DFX_texture_compression_FXT1", o(TDFX_texture_compression_FXT1), GL, 1999 },
282 { "GL_AMD_conservative_depth", o(ARB_conservative_depth), GL, 2009 },
283 { "GL_AMD_draw_buffers_blend", o(ARB_draw_buffers_blend), GL, 2009 },
284 { "GL_AMD_seamless_cubemap_per_texture", o(AMD_seamless_cubemap_per_texture), GL, 2009 },
285 { "GL_AMD_shader_stencil_export", o(ARB_shader_stencil_export), GL, 2009 },
286 { "GL_APPLE_object_purgeable", o(APPLE_object_purgeable), GL, 2006 },
287 { "GL_APPLE_packed_pixels", o(dummy_true), GLL, 2002 },
288 { "GL_APPLE_texture_max_level", o(dummy_true), ES1 | ES2, 2009 },
289 { "GL_APPLE_vertex_array_object", o(dummy_true), GLL, 2002 },
290 { "GL_ATI_blend_equation_separate", o(EXT_blend_equation_separate), GL, 2003 },
291 { "GL_ATI_draw_buffers", o(dummy_true), GLL, 2002 },
292 { "GL_ATI_envmap_bumpmap", o(ATI_envmap_bumpmap), GLL, 2001 },
293 { "GL_ATI_fragment_shader", o(ATI_fragment_shader), GLL, 2001 },
294 { "GL_ATI_separate_stencil", o(ATI_separate_stencil), GLL, 2006 },
295 { "GL_ATI_texture_compression_3dc", o(ATI_texture_compression_3dc), GL, 2004 },
296 { "GL_ATI_texture_env_combine3", o(ATI_texture_env_combine3), GLL, 2002 },
297 { "GL_ATI_texture_float", o(ARB_texture_float), GL, 2002 },
298 { "GL_ATI_texture_mirror_once", o(ATI_texture_mirror_once), GL, 2006 },
299 { "GL_IBM_multimode_draw_arrays", o(dummy_true), GL, 1998 },
300 { "GL_IBM_rasterpos_clip", o(dummy_true), GL, 1996 },
301 { "GL_IBM_texture_mirrored_repeat", o(dummy_true), GLL, 1998 },
302 { "GL_INGR_blend_func_separate", o(EXT_blend_func_separate), GLL, 1999 },
303 { "GL_MESA_pack_invert", o(MESA_pack_invert), GL, 2002 },
304 { "GL_MESA_resize_buffers", o(MESA_resize_buffers), GL, 1999 },
305 { "GL_MESA_texture_array", o(MESA_texture_array), GLL, 2007 },
306 { "GL_MESA_texture_signed_rgba", o(EXT_texture_snorm), GL, 2009 },
307 { "GL_MESA_window_pos", o(dummy_true), GLL, 2000 },
308 { "GL_MESA_ycbcr_texture", o(MESA_ycbcr_texture), GL, 2002 },
309 { "GL_NV_blend_square", o(NV_blend_square), GLL, 1999 },
310 { "GL_NV_conditional_render", o(NV_conditional_render), GL, 2008 },
311 { "GL_NV_depth_clamp", o(ARB_depth_clamp), GL, 2001 },
312 { "GL_NV_draw_buffers", o(dummy_true), ES2, 2011 },
313 { "GL_NV_fbo_color_attachments", o(EXT_framebuffer_object), ES2, 2010 },
314 { "GL_NV_fog_distance", o(NV_fog_distance), GLL, 2001 },
315 { "GL_NV_fragment_program_option", o(NV_fragment_program_option), GLL, 2005 },
316 { "GL_NV_light_max_exponent", o(dummy_true), GLL, 1999 },
317 { "GL_NV_packed_depth_stencil", o(EXT_packed_depth_stencil), GL, 2000 },
318 { "GL_NV_point_sprite", o(NV_point_sprite), GL, 2001 },
319 { "GL_NV_primitive_restart", o(NV_primitive_restart), GLL, 2002 },
320 { "GL_NV_read_buffer", o(dummy_true), ES2, 2011 },
321 { "GL_NV_texgen_reflection", o(dummy_true), GLL, 1999 },
322 { "GL_NV_texture_barrier", o(NV_texture_barrier), GL, 2009 },
323 { "GL_NV_texture_env_combine4", o(NV_texture_env_combine4), GLL, 1999 },
324 { "GL_NV_texture_rectangle", o(NV_texture_rectangle), GLL, 2000 },
325 { "GL_S3_s3tc", o(ANGLE_texture_compression_dxt), GL, 1999 },
326 { "GL_SGIS_generate_mipmap", o(dummy_true), GLL, 1997 },
327 { "GL_SGIS_texture_border_clamp", o(ARB_texture_border_clamp), GLL, 1997 },
328 { "GL_SGIS_texture_edge_clamp", o(dummy_true), GLL, 1997 },
329 { "GL_SGIS_texture_lod", o(dummy_true), GLL, 1997 },
330 { "GL_SUN_multi_draw_arrays", o(dummy_true), GLL, 1999 },
331
332 { 0, 0, 0, 0 },
333 };
334
335
336 /**
337 * Given an extension name, lookup up the corresponding member of struct
338 * gl_extensions and return that member's offset (in bytes). If the name is
339 * not found in the \c extension_table, return 0.
340 *
341 * \param name Name of extension.
342 * \return Offset of member in struct gl_extensions.
343 */
344 static size_t
345 name_to_offset(const char* name)
346 {
347 const struct extension *i;
348
349 if (name == 0)
350 return 0;
351
352 for (i = extension_table; i->name != 0; ++i) {
353 if (strcmp(name, i->name) == 0)
354 return i->offset;
355 }
356
357 return 0;
358 }
359
360
361 /**
362 * Enable all extensions suitable for a software-only renderer.
363 * This is a convenience function used by the XMesa, OSMesa, GGI drivers, etc.
364 */
365 void
366 _mesa_enable_sw_extensions(struct gl_context *ctx)
367 {
368 ctx->Extensions.ARB_depth_clamp = GL_TRUE;
369 ctx->Extensions.ARB_depth_texture = GL_TRUE;
370 ctx->Extensions.ARB_draw_elements_base_vertex = GL_TRUE;
371 ctx->Extensions.ARB_draw_instanced = GL_TRUE;
372 ctx->Extensions.ARB_explicit_attrib_location = GL_TRUE;
373 ctx->Extensions.ARB_fragment_coord_conventions = GL_TRUE;
374 ctx->Extensions.ARB_fragment_program = GL_TRUE;
375 ctx->Extensions.ARB_fragment_program_shadow = GL_TRUE;
376 ctx->Extensions.ARB_fragment_shader = GL_TRUE;
377 ctx->Extensions.ARB_framebuffer_object = GL_TRUE;
378 /* XXX re-enable when GLSL compiler again supports geometry shaders */
379 #if 0
380 ctx->Extensions.ARB_geometry_shader4 = GL_TRUE;
381 #endif
382 ctx->Extensions.ARB_half_float_pixel = GL_TRUE;
383 ctx->Extensions.ARB_half_float_vertex = GL_TRUE;
384 ctx->Extensions.ARB_map_buffer_range = GL_TRUE;
385 ctx->Extensions.ARB_occlusion_query = GL_TRUE;
386 ctx->Extensions.ARB_occlusion_query2 = GL_TRUE;
387 ctx->Extensions.ARB_point_sprite = GL_TRUE;
388 ctx->Extensions.ARB_shader_objects = GL_TRUE;
389 ctx->Extensions.EXT_separate_shader_objects = GL_TRUE;
390 ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
391 ctx->Extensions.ARB_shadow = GL_TRUE;
392 ctx->Extensions.ARB_texture_border_clamp = GL_TRUE;
393 ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
394 ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
395 ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
396 ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
397 /*ctx->Extensions.ARB_texture_float = GL_TRUE;*/
398 ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
399 ctx->Extensions.ARB_texture_rg = GL_TRUE;
400 ctx->Extensions.ARB_texture_compression_rgtc = GL_TRUE;
401 ctx->Extensions.ARB_texture_storage = GL_TRUE;
402 ctx->Extensions.ARB_vertex_program = GL_TRUE;
403 ctx->Extensions.ARB_vertex_shader = GL_TRUE;
404 ctx->Extensions.ARB_sync = GL_TRUE;
405 ctx->Extensions.APPLE_object_purgeable = GL_TRUE;
406 ctx->Extensions.ATI_envmap_bumpmap = GL_TRUE;
407 ctx->Extensions.ATI_fragment_shader = GL_TRUE;
408 ctx->Extensions.ATI_texture_compression_3dc = GL_TRUE;
409 ctx->Extensions.ATI_texture_env_combine3 = GL_TRUE;
410 ctx->Extensions.ATI_texture_mirror_once = GL_TRUE;
411 ctx->Extensions.ATI_separate_stencil = GL_TRUE;
412 ctx->Extensions.EXT_blend_color = GL_TRUE;
413 ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
414 ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
415 ctx->Extensions.EXT_blend_minmax = GL_TRUE;
416 ctx->Extensions.EXT_depth_bounds_test = GL_TRUE;
417 ctx->Extensions.EXT_draw_buffers2 = GL_TRUE;
418 ctx->Extensions.EXT_fog_coord = GL_TRUE;
419 ctx->Extensions.EXT_framebuffer_object = GL_TRUE;
420 ctx->Extensions.EXT_framebuffer_blit = GL_TRUE;
421 ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE;
422 ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
423 ctx->Extensions.EXT_point_parameters = GL_TRUE;
424 ctx->Extensions.EXT_provoking_vertex = GL_TRUE;
425 ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
426 ctx->Extensions.EXT_secondary_color = GL_TRUE;
427 ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
428 ctx->Extensions.EXT_texture_array = GL_TRUE;
429 ctx->Extensions.EXT_texture_compression_latc = GL_TRUE;
430 ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
431 ctx->Extensions.EXT_texture_filter_anisotropic = GL_TRUE;
432 ctx->Extensions.EXT_texture_mirror_clamp = GL_TRUE;
433 ctx->Extensions.EXT_texture_shared_exponent = GL_TRUE;
434 ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
435 ctx->Extensions.EXT_texture_sRGB_decode = GL_TRUE;
436 ctx->Extensions.EXT_texture_swizzle = GL_TRUE;
437 /*ctx->Extensions.EXT_transform_feedback = GL_TRUE;*/
438 ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE;
439 ctx->Extensions.MESA_pack_invert = GL_TRUE;
440 ctx->Extensions.MESA_resize_buffers = GL_TRUE;
441 ctx->Extensions.MESA_texture_array = GL_TRUE;
442 ctx->Extensions.MESA_ycbcr_texture = GL_TRUE;
443 ctx->Extensions.NV_blend_square = GL_TRUE;
444 ctx->Extensions.NV_conditional_render = GL_TRUE;
445 ctx->Extensions.NV_point_sprite = GL_TRUE;
446 ctx->Extensions.NV_texture_env_combine4 = GL_TRUE;
447 ctx->Extensions.NV_texture_rectangle = GL_TRUE;
448 ctx->Extensions.NV_fragment_program_option = GL_TRUE;
449 ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE;
450 ctx->Extensions.OES_standard_derivatives = GL_TRUE;
451 _mesa_enable_extension(ctx, "GL_3DFX_texture_compression_FXT1");
452 if (ctx->Mesa_DXTn) {
453 ctx->Extensions.ANGLE_texture_compression_dxt = GL_TRUE;
454 _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
455 _mesa_enable_extension(ctx, "GL_S3_s3tc");
456 }
457 }
458
459
460 /**
461 * Enable all OpenGL 1.3 features and extensions.
462 * A convenience function to be called by drivers.
463 */
464 void
465 _mesa_enable_1_3_extensions(struct gl_context *ctx)
466 {
467 ctx->Extensions.ARB_texture_border_clamp = GL_TRUE;
468 ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
469 ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
470 ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
471 }
472
473
474
475 /**
476 * Enable all OpenGL 1.4 features and extensions.
477 * A convenience function to be called by drivers.
478 */
479 void
480 _mesa_enable_1_4_extensions(struct gl_context *ctx)
481 {
482 ctx->Extensions.ARB_depth_texture = GL_TRUE;
483 ctx->Extensions.ARB_shadow = GL_TRUE;
484 ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
485 ctx->Extensions.EXT_blend_color = GL_TRUE;
486 ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
487 ctx->Extensions.EXT_blend_minmax = GL_TRUE;
488 ctx->Extensions.EXT_fog_coord = GL_TRUE;
489 ctx->Extensions.EXT_point_parameters = GL_TRUE;
490 ctx->Extensions.EXT_secondary_color = GL_TRUE;
491 }
492
493
494 /**
495 * Enable all OpenGL 1.5 features and extensions.
496 * A convenience function to be called by drivers.
497 */
498 void
499 _mesa_enable_1_5_extensions(struct gl_context *ctx)
500 {
501 ctx->Extensions.ARB_occlusion_query = GL_TRUE;
502 ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
503 }
504
505
506 /**
507 * Enable all OpenGL 2.0 features and extensions.
508 * A convenience function to be called by drivers.
509 */
510 void
511 _mesa_enable_2_0_extensions(struct gl_context *ctx)
512 {
513 ctx->Extensions.ARB_fragment_shader = GL_TRUE;
514 ctx->Extensions.ARB_point_sprite = GL_TRUE;
515 ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
516 ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
517 ctx->Extensions.ARB_shader_objects = GL_TRUE;
518 ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
519 ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
520 ctx->Extensions.ARB_vertex_shader = GL_TRUE;
521 }
522
523
524 /**
525 * Enable all OpenGL 2.1 features and extensions.
526 * A convenience function to be called by drivers.
527 */
528 void
529 _mesa_enable_2_1_extensions(struct gl_context *ctx)
530 {
531 ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
532 ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
533 }
534
535
536 /**
537 * Either enable or disable the named extension.
538 * \return GL_TRUE for success, GL_FALSE if invalid extension name
539 */
540 static GLboolean
541 set_extension( struct gl_context *ctx, const char *name, GLboolean state )
542 {
543 size_t offset;
544
545 if (ctx->Extensions.String) {
546 /* The string was already queried - can't change it now! */
547 _mesa_problem(ctx, "Trying to enable/disable extension after glGetString(GL_EXTENSIONS): %s", name);
548 return GL_FALSE;
549 }
550
551 offset = name_to_offset(name);
552 if (offset == 0) {
553 _mesa_problem(ctx, "Trying to enable/disable unknown extension %s",
554 name);
555 return GL_FALSE;
556 } else if (offset == o(dummy_true) && state == GL_FALSE) {
557 _mesa_problem(ctx, "Trying to disable a permanently enabled extension: "
558 "%s", name);
559 return GL_FALSE;
560 } else {
561 GLboolean *base = (GLboolean *) &ctx->Extensions;
562 base[offset] = state;
563 return GL_TRUE;
564 }
565 }
566
567
568 /**
569 * Enable the named extension.
570 * Typically called by drivers.
571 */
572 void
573 _mesa_enable_extension( struct gl_context *ctx, const char *name )
574 {
575 if (!set_extension(ctx, name, GL_TRUE))
576 _mesa_problem(ctx, "Trying to enable unknown extension: %s", name);
577 }
578
579
580 /**
581 * Disable the named extension.
582 * XXX is this really needed???
583 */
584 void
585 _mesa_disable_extension( struct gl_context *ctx, const char *name )
586 {
587 if (!set_extension(ctx, name, GL_FALSE))
588 _mesa_problem(ctx, "Trying to disable unknown extension: %s", name);
589 }
590
591
592 /**
593 * Test if the named extension is enabled in this context.
594 */
595 GLboolean
596 _mesa_extension_is_enabled( struct gl_context *ctx, const char *name )
597 {
598 size_t offset;
599 GLboolean *base;
600
601 if (name == 0)
602 return GL_FALSE;
603
604 offset = name_to_offset(name);
605 if (offset == 0)
606 return GL_FALSE;
607 base = (GLboolean *) &ctx->Extensions;
608 return base[offset];
609 }
610
611
612 /**
613 * \brief Apply the \c MESA_EXTENSION_OVERRIDE environment variable.
614 *
615 * \c MESA_EXTENSION_OVERRIDE is a space-separated list of extensions to
616 * enable or disable. The list is processed thus:
617 * - Enable recognized extension names that are prefixed with '+'.
618 * - Disable recognized extension names that are prefixed with '-'.
619 * - Enable recognized extension names that are not prefixed.
620 * - Collect unrecognized extension names in a new string.
621 *
622 * \return Space-separated list of unrecognized extension names (which must
623 * be freed). Does not return \c NULL.
624 */
625 static char *
626 get_extension_override( struct gl_context *ctx )
627 {
628 const char *env_const = _mesa_getenv("MESA_EXTENSION_OVERRIDE");
629 char *env;
630 char *ext;
631 char *extra_exts;
632 int len;
633
634 if (env_const == NULL) {
635 /* Return the empty string rather than NULL. This simplifies the logic
636 * of client functions. */
637 return calloc(4, sizeof(char));
638 }
639
640 /* extra_exts: List of unrecognized extensions. */
641 extra_exts = calloc(ALIGN(strlen(env_const) + 2, 4), sizeof(char));
642
643 /* Copy env_const because strtok() is destructive. */
644 env = strdup(env_const);
645 for (ext = strtok(env, " "); ext != NULL; ext = strtok(NULL, " ")) {
646 int enable;
647 int recognized;
648 switch (ext[0]) {
649 case '+':
650 enable = 1;
651 ++ext;
652 break;
653 case '-':
654 enable = 0;
655 ++ext;
656 break;
657 default:
658 enable = 1;
659 break;
660 }
661 recognized = set_extension(ctx, ext, enable);
662 if (!recognized) {
663 strcat(extra_exts, ext);
664 strcat(extra_exts, " ");
665 }
666 }
667
668 free(env);
669
670 /* Remove trailing space. */
671 len = strlen(extra_exts);
672 if (len > 0 && extra_exts[len - 1] == ' ')
673 extra_exts[len - 1] = '\0';
674
675 return extra_exts;
676 }
677
678
679 /**
680 * \brief Initialize extension tables and enable default extensions.
681 *
682 * This should be called during context initialization.
683 * Note: Sets gl_extensions.dummy_true to true.
684 */
685 void
686 _mesa_init_extensions( struct gl_context *ctx )
687 {
688 GLboolean *base = (GLboolean *) &ctx->Extensions;
689 GLboolean *sentinel = base + o(extension_sentinel);
690 GLboolean *i;
691
692 /* First, turn all extensions off. */
693 for (i = base; i != sentinel; ++i)
694 *i = GL_FALSE;
695
696 /* Then, selectively turn default extensions on. */
697 ctx->Extensions.dummy_true = GL_TRUE;
698 ctx->Extensions.EXT_texture3D = GL_TRUE;
699 }
700
701
702 typedef unsigned short extension_index;
703
704
705 /**
706 * Compare two entries of the extensions table. Sorts first by year,
707 * then by name.
708 *
709 * Arguments are indices into extension_table.
710 */
711 static int
712 extension_compare(const void *p1, const void *p2)
713 {
714 extension_index i1 = * (const extension_index *) p1;
715 extension_index i2 = * (const extension_index *) p2;
716 const struct extension *e1 = &extension_table[i1];
717 const struct extension *e2 = &extension_table[i2];
718 int res;
719
720 res = (int)e1->year - (int)e2->year;
721
722 if (res == 0) {
723 res = strcmp(e1->name, e2->name);
724 }
725
726 return res;
727 }
728
729
730 /**
731 * Construct the GL_EXTENSIONS string. Called the first time that
732 * glGetString(GL_EXTENSIONS) is called.
733 */
734 GLubyte*
735 _mesa_make_extension_string(struct gl_context *ctx)
736 {
737 /* The extension string. */
738 char *exts = 0;
739 /* Length of extension string. */
740 size_t length = 0;
741 /* Number of extensions */
742 unsigned count;
743 /* Indices of the extensions sorted by year */
744 extension_index *extension_indices;
745 /* String of extra extensions. */
746 char *extra_extensions = get_extension_override(ctx);
747 GLboolean *base = (GLboolean *) &ctx->Extensions;
748 const struct extension *i;
749 unsigned j;
750 unsigned maxYear = ~0;
751 unsigned api_set = (1 << ctx->API);
752 if (_mesa_is_gles3(ctx))
753 api_set |= ES3;
754
755 /* Check if the MESA_EXTENSION_MAX_YEAR env var is set */
756 {
757 const char *env = getenv("MESA_EXTENSION_MAX_YEAR");
758 if (env) {
759 maxYear = atoi(env);
760 _mesa_debug(ctx, "Note: limiting GL extensions to %u or earlier\n",
761 maxYear);
762 }
763 }
764
765 /* Compute length of the extension string. */
766 count = 0;
767 for (i = extension_table; i->name != 0; ++i) {
768 if (base[i->offset] &&
769 i->year <= maxYear &&
770 (i->api_set & api_set)) {
771 length += strlen(i->name) + 1; /* +1 for space */
772 ++count;
773 }
774 }
775 if (extra_extensions != NULL)
776 length += 1 + strlen(extra_extensions); /* +1 for space */
777
778 exts = calloc(ALIGN(length + 1, 4), sizeof(char));
779 if (exts == NULL) {
780 free(extra_extensions);
781 return NULL;
782 }
783
784 extension_indices = malloc(count * sizeof(extension_index));
785 if (extension_indices == NULL) {
786 free(exts);
787 free(extra_extensions);
788 return NULL;
789 }
790
791 /* Sort extensions in chronological order because certain old applications (e.g.,
792 * Quake3 demo) store the extension list in a static size buffer so chronologically
793 * order ensure that the extensions that such applications expect will fit into
794 * that buffer.
795 */
796 j = 0;
797 for (i = extension_table; i->name != 0; ++i) {
798 if (base[i->offset] &&
799 i->year <= maxYear &&
800 (i->api_set & api_set)) {
801 extension_indices[j++] = i - extension_table;
802 }
803 }
804 assert(j == count);
805 qsort(extension_indices, count, sizeof *extension_indices, extension_compare);
806
807 /* Build the extension string.*/
808 for (j = 0; j < count; ++j) {
809 i = &extension_table[extension_indices[j]];
810 assert(base[i->offset] && (i->api_set & api_set));
811 strcat(exts, i->name);
812 strcat(exts, " ");
813 }
814 free(extension_indices);
815 if (extra_extensions != 0) {
816 strcat(exts, extra_extensions);
817 free(extra_extensions);
818 }
819
820 return (GLubyte *) exts;
821 }
822
823 /**
824 * Return number of enabled extensions.
825 */
826 GLuint
827 _mesa_get_extension_count(struct gl_context *ctx)
828 {
829 GLboolean *base;
830 const struct extension *i;
831 unsigned api_set = (1 << ctx->API);
832 if (_mesa_is_gles3(ctx))
833 api_set |= ES3;
834
835 /* only count once */
836 if (ctx->Extensions.Count != 0)
837 return ctx->Extensions.Count;
838
839 base = (GLboolean *) &ctx->Extensions;
840 for (i = extension_table; i->name != 0; ++i) {
841 if (base[i->offset] && (i->api_set & api_set)) {
842 ctx->Extensions.Count++;
843 }
844 }
845 return ctx->Extensions.Count;
846 }
847
848 /**
849 * Return name of i-th enabled extension
850 */
851 const GLubyte *
852 _mesa_get_enabled_extension(struct gl_context *ctx, GLuint index)
853 {
854 const GLboolean *base;
855 size_t n;
856 const struct extension *i;
857 unsigned api_set = (1 << ctx->API);
858 if (_mesa_is_gles3(ctx))
859 api_set |= ES3;
860
861 base = (GLboolean*) &ctx->Extensions;
862 n = 0;
863 for (i = extension_table; i->name != 0; ++i) {
864 if (base[i->offset] && (i->api_set & api_set)) {
865 if (n == index)
866 return (const GLubyte*) i->name;
867 else
868 ++n;
869 }
870 }
871
872 return NULL;
873 }