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mesa: remove EXT_separate_specular_color extension enable flag
[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 "mfeatures.h"
38 #include "mtypes.h"
39
40 #define ALIGN(value, alignment) (((value) + alignment - 1) & ~(alignment - 1))
41
42 enum {
43 DISABLE = 0,
44 GLL = 1 << API_OPENGL, /* GL Legacy / Compatibility */
45 GLC = 1 << API_OPENGL_CORE, /* GL Core */
46 GL = (1 << API_OPENGL) | (1 << API_OPENGL_CORE),
47 ES1 = 1 << API_OPENGLES,
48 ES2 = 1 << API_OPENGLES2,
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_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_half_float_pixel", o(ARB_half_float_pixel), GL, 2003 },
104 { "GL_ARB_half_float_vertex", o(ARB_half_float_vertex), GL, 2008 },
105 { "GL_ARB_instanced_arrays", o(ARB_instanced_arrays), GL, 2008 },
106 { "GL_ARB_invalidate_subdata", o(dummy_true), GL, 2012 },
107 { "GL_ARB_map_buffer_alignment", o(ARB_map_buffer_alignment), GL, 2011 },
108 { "GL_ARB_map_buffer_range", o(ARB_map_buffer_range), GL, 2008 },
109 { "GL_ARB_multisample", o(dummy_true), GLL, 1994 },
110 { "GL_ARB_multitexture", o(dummy_true), GLL, 1998 },
111 { "GL_ARB_occlusion_query2", o(ARB_occlusion_query2), GL, 2003 },
112 { "GL_ARB_occlusion_query", o(ARB_occlusion_query), GLL, 2001 },
113 { "GL_ARB_pixel_buffer_object", o(EXT_pixel_buffer_object), GL, 2004 },
114 { "GL_ARB_point_parameters", o(EXT_point_parameters), GLL, 1997 },
115 { "GL_ARB_point_sprite", o(ARB_point_sprite), GL, 2003 },
116 { "GL_ARB_provoking_vertex", o(EXT_provoking_vertex), GL, 2009 },
117 { "GL_ARB_robustness", o(dummy_true), GL, 2010 },
118 { "GL_ARB_sampler_objects", o(dummy_true), GL, 2009 },
119 { "GL_ARB_seamless_cube_map", o(ARB_seamless_cube_map), GL, 2009 },
120 { "GL_ARB_shader_bit_encoding", o(ARB_shader_bit_encoding), GL, 2010 },
121 { "GL_ARB_shader_objects", o(ARB_shader_objects), GL, 2002 },
122 { "GL_ARB_shader_stencil_export", o(ARB_shader_stencil_export), GL, 2009 },
123 { "GL_ARB_shader_texture_lod", o(ARB_shader_texture_lod), GL, 2009 },
124 { "GL_ARB_shading_language_100", o(ARB_shading_language_100), GLL, 2003 },
125 { "GL_ARB_shadow", o(ARB_shadow), GLL, 2001 },
126 { "GL_ARB_sync", o(ARB_sync), GL, 2003 },
127 { "GL_ARB_texture_border_clamp", o(ARB_texture_border_clamp), GLL, 2000 },
128 { "GL_ARB_texture_buffer_object", o(ARB_texture_buffer_object), GL, 2008 },
129 { "GL_ARB_texture_compression", o(dummy_true), GLL, 2000 },
130 { "GL_ARB_texture_compression_rgtc", o(ARB_texture_compression_rgtc), GL, 2004 },
131 { "GL_ARB_texture_cube_map", o(ARB_texture_cube_map), GLL, 1999 },
132 { "GL_ARB_texture_env_add", o(dummy_true), GLL, 1999 },
133 { "GL_ARB_texture_env_combine", o(ARB_texture_env_combine), GLL, 2001 },
134 { "GL_ARB_texture_env_crossbar", o(ARB_texture_env_crossbar), GLL, 2001 },
135 { "GL_ARB_texture_env_dot3", o(ARB_texture_env_dot3), GLL, 2001 },
136 { "GL_ARB_texture_float", o(ARB_texture_float), GL, 2004 },
137 { "GL_ARB_texture_mirrored_repeat", o(dummy_true), GLL, 2001 },
138 { "GL_ARB_texture_multisample", o(ARB_texture_multisample), GL, 2009 },
139 { "GL_ARB_texture_non_power_of_two", o(ARB_texture_non_power_of_two), GL, 2003 },
140 { "GL_ARB_texture_rectangle", o(NV_texture_rectangle), GL, 2004 },
141 { "GL_ARB_texture_rgb10_a2ui", o(ARB_texture_rgb10_a2ui), GL, 2009 },
142 { "GL_ARB_texture_rg", o(ARB_texture_rg), GL, 2008 },
143 { "GL_ARB_texture_storage", o(ARB_texture_storage), GL, 2011 },
144 { "GL_ARB_texture_swizzle", o(EXT_texture_swizzle), GL, 2008 },
145 { "GL_ARB_timer_query", o(ARB_timer_query), GL, 2010 },
146 { "GL_ARB_transform_feedback2", o(ARB_transform_feedback2), GL, 2010 },
147 { "GL_ARB_transform_feedback3", o(ARB_transform_feedback3), GL, 2010 },
148 { "GL_ARB_transform_feedback_instanced", o(ARB_transform_feedback_instanced), GL, 2011 },
149 { "GL_ARB_transpose_matrix", o(dummy_true), GLL, 1999 },
150 { "GL_ARB_uniform_buffer_object", o(ARB_uniform_buffer_object), GL, 2009 },
151 { "GL_ARB_vertex_array_bgra", o(EXT_vertex_array_bgra), GL, 2008 },
152 { "GL_ARB_vertex_array_object", o(dummy_true), GL, 2006 },
153 { "GL_ARB_vertex_buffer_object", o(dummy_true), GLL, 2003 },
154 { "GL_ARB_vertex_program", o(ARB_vertex_program), GLL, 2002 },
155 { "GL_ARB_vertex_shader", o(ARB_vertex_shader), GL, 2002 },
156 { "GL_ARB_vertex_type_2_10_10_10_rev", o(ARB_vertex_type_2_10_10_10_rev), GL, 2009 },
157 { "GL_ARB_window_pos", o(dummy_true), GLL, 2001 },
158 /* EXT extensions */
159 { "GL_EXT_abgr", o(dummy_true), GL, 1995 },
160 { "GL_EXT_bgra", o(dummy_true), GLL, 1995 },
161 { "GL_EXT_blend_color", o(EXT_blend_color), GLL, 1995 },
162 { "GL_EXT_blend_equation_separate", o(EXT_blend_equation_separate), GL, 2003 },
163 { "GL_EXT_blend_func_separate", o(EXT_blend_func_separate), GLL, 1999 },
164 { "GL_EXT_blend_minmax", o(EXT_blend_minmax), GLL | ES1 | ES2, 1995 },
165 { "GL_EXT_blend_subtract", o(dummy_true), GLL, 1995 },
166 { "GL_EXT_clip_volume_hint", o(EXT_clip_volume_hint), GL, 1996 },
167 { "GL_EXT_compiled_vertex_array", o(dummy_true), GLL, 1996 },
168 { "GL_EXT_copy_texture", o(dummy_true), GLL, 1995 },
169 { "GL_EXT_depth_bounds_test", o(EXT_depth_bounds_test), GL, 2002 },
170 { "GL_EXT_draw_buffers2", o(EXT_draw_buffers2), GL, 2006 },
171 { "GL_EXT_draw_instanced", o(ARB_draw_instanced), GL, 2006 },
172 { "GL_EXT_draw_range_elements", o(dummy_true), GLL, 1997 },
173 { "GL_EXT_fog_coord", o(EXT_fog_coord), GLL, 1999 },
174 { "GL_EXT_framebuffer_blit", o(EXT_framebuffer_blit), GL, 2005 },
175 { "GL_EXT_framebuffer_multisample", o(EXT_framebuffer_multisample), GL, 2005 },
176 { "GL_EXT_framebuffer_object", o(EXT_framebuffer_object), GL, 2000 },
177 { "GL_EXT_framebuffer_sRGB", o(EXT_framebuffer_sRGB), GL, 1998 },
178 { "GL_EXT_gpu_program_parameters", o(EXT_gpu_program_parameters), GLL, 2006 },
179 { "GL_EXT_gpu_shader4", o(EXT_gpu_shader4), GL, 2006 },
180 { "GL_EXT_map_buffer_range", o(ARB_map_buffer_range), ES1 | ES2, 2012 },
181 { "GL_EXT_multi_draw_arrays", o(dummy_true), GLL | ES1 | ES2, 1999 },
182 { "GL_EXT_packed_depth_stencil", o(EXT_packed_depth_stencil), GL, 2005 },
183 { "GL_EXT_packed_float", o(EXT_packed_float), GL, 2004 },
184 { "GL_EXT_packed_pixels", o(dummy_true), GLL, 1997 },
185 { "GL_EXT_pixel_buffer_object", o(EXT_pixel_buffer_object), GL, 2004 },
186 { "GL_EXT_point_parameters", o(EXT_point_parameters), GLL, 1997 },
187 { "GL_EXT_polygon_offset", o(dummy_true), GLL, 1995 },
188 { "GL_EXT_provoking_vertex", o(EXT_provoking_vertex), GL, 2009 },
189 { "GL_EXT_rescale_normal", o(dummy_true), GLL, 1997 },
190 { "GL_EXT_secondary_color", o(EXT_secondary_color), GLL, 1999 },
191 { "GL_EXT_separate_shader_objects", o(EXT_separate_shader_objects), GLL, 2008 },
192 { "GL_EXT_separate_specular_color", o(dummy_true), GLL, 1997 },
193 { "GL_EXT_shadow_funcs", o(EXT_shadow_funcs), GLL, 2002 },
194 { "GL_EXT_stencil_two_side", o(EXT_stencil_two_side), GLL, 2001 },
195 { "GL_EXT_stencil_wrap", o(dummy_true), GLL, 2002 },
196 { "GL_EXT_subtexture", o(dummy_true), GLL, 1995 },
197 { "GL_EXT_texture3D", o(EXT_texture3D), GLL, 1996 },
198 { "GL_EXT_texture_array", o(EXT_texture_array), GL, 2006 },
199 { "GL_EXT_texture_compression_dxt1", o(EXT_texture_compression_s3tc), GL | ES1 | ES2, 2004 },
200 { "GL_ANGLE_texture_compression_dxt3", o(ANGLE_texture_compression_dxt), ES2, 2011 },
201 { "GL_ANGLE_texture_compression_dxt5", o(ANGLE_texture_compression_dxt), ES2, 2011 },
202 { "GL_EXT_texture_compression_latc", o(EXT_texture_compression_latc), GL, 2006 },
203 { "GL_EXT_texture_compression_rgtc", o(ARB_texture_compression_rgtc), GL, 2004 },
204 { "GL_EXT_texture_compression_s3tc", o(EXT_texture_compression_s3tc), GL, 2000 },
205 { "GL_EXT_texture_cube_map", o(ARB_texture_cube_map), GLL, 2001 },
206 { "GL_EXT_texture_edge_clamp", o(dummy_true), GLL, 1997 },
207 { "GL_EXT_texture_env_add", o(dummy_true), GLL, 1999 },
208 { "GL_EXT_texture_env_combine", o(dummy_true), GLL, 2000 },
209 { "GL_EXT_texture_env_dot3", o(EXT_texture_env_dot3), GLL, 2000 },
210 { "GL_EXT_texture_filter_anisotropic", o(EXT_texture_filter_anisotropic), GL | ES1 | ES2, 1999 },
211 { "GL_EXT_texture_format_BGRA8888", o(dummy_true), ES1 | ES2, 2005 },
212 { "GL_EXT_texture_rg", o(ARB_texture_rg), ES2, 2011 },
213 { "GL_EXT_read_format_bgra", o(dummy_true), ES1 | ES2, 2009 },
214 { "GL_EXT_texture_integer", o(EXT_texture_integer), GL, 2006 },
215 { "GL_EXT_texture_lod_bias", o(dummy_true), GLL | ES1, 1999 },
216 { "GL_EXT_texture_mirror_clamp", o(EXT_texture_mirror_clamp), GL, 2004 },
217 { "GL_EXT_texture_object", o(dummy_true), GLL, 1995 },
218 { "GL_EXT_texture", o(dummy_true), GLL, 1996 },
219 { "GL_EXT_texture_rectangle", o(NV_texture_rectangle), GLL, 2004 },
220 { "GL_EXT_texture_shared_exponent", o(EXT_texture_shared_exponent), GL, 2004 },
221 { "GL_EXT_texture_snorm", o(EXT_texture_snorm), GL, 2009 },
222 { "GL_EXT_texture_sRGB", o(EXT_texture_sRGB), GL, 2004 },
223 { "GL_EXT_texture_sRGB_decode", o(EXT_texture_sRGB_decode), GL, 2006 },
224 { "GL_EXT_texture_swizzle", o(EXT_texture_swizzle), GL, 2008 },
225 { "GL_EXT_texture_type_2_10_10_10_REV", o(dummy_true), ES2, 2008 },
226 { "GL_EXT_timer_query", o(EXT_timer_query), GL, 2006 },
227 { "GL_EXT_transform_feedback", o(EXT_transform_feedback), GL, 2011 },
228 { "GL_EXT_unpack_subimage", o(dummy_true), ES2, 2011 },
229 { "GL_EXT_vertex_array_bgra", o(EXT_vertex_array_bgra), GL, 2008 },
230 { "GL_EXT_vertex_array", o(dummy_true), GLL, 1995 },
231
232 /* OES extensions */
233 { "GL_OES_blend_equation_separate", o(EXT_blend_equation_separate), ES1, 2009 },
234 { "GL_OES_blend_func_separate", o(EXT_blend_func_separate), ES1, 2009 },
235 { "GL_OES_blend_subtract", o(dummy_true), ES1, 2009 },
236 { "GL_OES_byte_coordinates", o(dummy_true), ES1, 2002 },
237 { "GL_OES_compressed_ETC1_RGB8_texture", o(OES_compressed_ETC1_RGB8_texture), ES1 | ES2, 2005 },
238 { "GL_OES_compressed_paletted_texture", o(dummy_true), ES1, 2003 },
239 { "GL_OES_depth24", o(EXT_framebuffer_object), ES1 | ES2, 2005 },
240 { "GL_OES_depth32", o(dummy_false), DISABLE, 2005 },
241 { "GL_OES_depth_texture", o(ARB_depth_texture), ES2, 2006 },
242 { "GL_OES_draw_texture", o(OES_draw_texture), ES1, 2004 },
243 /* FIXME: Mesa expects GL_OES_EGL_image to be available in OpenGL contexts. */
244 { "GL_OES_EGL_image", o(OES_EGL_image), GL | ES1 | ES2, 2006 },
245 { "GL_OES_EGL_image_external", o(OES_EGL_image_external), ES1 | ES2, 2010 },
246 { "GL_OES_element_index_uint", o(dummy_true), ES1 | ES2, 2005 },
247 { "GL_OES_fbo_render_mipmap", o(EXT_framebuffer_object), ES1 | ES2, 2005 },
248 { "GL_OES_fixed_point", o(dummy_true), ES1, 2002 },
249 { "GL_OES_framebuffer_object", o(EXT_framebuffer_object), ES1, 2005 },
250 { "GL_OES_mapbuffer", o(dummy_true), ES1 | ES2, 2005 },
251 { "GL_OES_matrix_get", o(dummy_true), ES1, 2004 },
252 { "GL_OES_packed_depth_stencil", o(EXT_packed_depth_stencil), ES1 | ES2, 2007 },
253 { "GL_OES_point_size_array", o(dummy_true), ES1, 2004 },
254 { "GL_OES_point_sprite", o(ARB_point_sprite), ES1, 2004 },
255 { "GL_OES_query_matrix", o(dummy_true), ES1, 2003 },
256 { "GL_OES_read_format", o(dummy_true), GL | ES1, 2003 },
257 { "GL_OES_rgb8_rgba8", o(EXT_framebuffer_object), ES1 | ES2, 2005 },
258 { "GL_OES_single_precision", o(dummy_true), ES1, 2003 },
259 { "GL_OES_standard_derivatives", o(OES_standard_derivatives), ES2, 2005 },
260 { "GL_OES_stencil1", o(dummy_false), DISABLE, 2005 },
261 { "GL_OES_stencil4", o(dummy_false), DISABLE, 2005 },
262 { "GL_OES_stencil8", o(EXT_framebuffer_object), ES1 | ES2, 2005 },
263 { "GL_OES_stencil_wrap", o(dummy_true), ES1, 2002 },
264 { "GL_OES_texture_3D", o(EXT_texture3D), ES2, 2005 },
265 { "GL_OES_texture_cube_map", o(ARB_texture_cube_map), ES1, 2007 },
266 { "GL_OES_texture_env_crossbar", o(ARB_texture_env_crossbar), ES1, 2005 },
267 { "GL_OES_texture_mirrored_repeat", o(dummy_true), ES1, 2005 },
268 { "GL_OES_texture_npot", o(ARB_texture_non_power_of_two), ES2, 2005 },
269 { "GL_OES_vertex_array_object", o(dummy_true), ES1 | ES2, 2010 },
270
271 /* Vendor extensions */
272 { "GL_3DFX_texture_compression_FXT1", o(TDFX_texture_compression_FXT1), GL, 1999 },
273 { "GL_AMD_conservative_depth", o(ARB_conservative_depth), GL, 2009 },
274 { "GL_AMD_draw_buffers_blend", o(ARB_draw_buffers_blend), GL, 2009 },
275 { "GL_AMD_seamless_cubemap_per_texture", o(AMD_seamless_cubemap_per_texture), GL, 2009 },
276 { "GL_AMD_shader_stencil_export", o(ARB_shader_stencil_export), GL, 2009 },
277 { "GL_APPLE_object_purgeable", o(APPLE_object_purgeable), GL, 2006 },
278 { "GL_APPLE_packed_pixels", o(APPLE_packed_pixels), GLL, 2002 },
279 { "GL_APPLE_texture_max_level", o(dummy_true), ES1 | ES2, 2009 },
280 { "GL_APPLE_vertex_array_object", o(dummy_true), GLL, 2002 },
281 { "GL_ATI_blend_equation_separate", o(EXT_blend_equation_separate), GL, 2003 },
282 { "GL_ATI_draw_buffers", o(dummy_true), GLL, 2002 },
283 { "GL_ATI_envmap_bumpmap", o(ATI_envmap_bumpmap), GLL, 2001 },
284 { "GL_ATI_fragment_shader", o(ATI_fragment_shader), GLL, 2001 },
285 { "GL_ATI_separate_stencil", o(ATI_separate_stencil), GLL, 2006 },
286 { "GL_ATI_texture_compression_3dc", o(ATI_texture_compression_3dc), GL, 2004 },
287 { "GL_ATI_texture_env_combine3", o(ATI_texture_env_combine3), GLL, 2002 },
288 { "GL_ATI_texture_float", o(ARB_texture_float), GL, 2002 },
289 { "GL_ATI_texture_mirror_once", o(ATI_texture_mirror_once), GL, 2006 },
290 { "GL_IBM_multimode_draw_arrays", o(IBM_multimode_draw_arrays), GL, 1998 },
291 { "GL_IBM_rasterpos_clip", o(IBM_rasterpos_clip), GL, 1996 },
292 { "GL_IBM_texture_mirrored_repeat", o(dummy_true), GLL, 1998 },
293 { "GL_INGR_blend_func_separate", o(EXT_blend_func_separate), GLL, 1999 },
294 { "GL_MESA_pack_invert", o(MESA_pack_invert), GL, 2002 },
295 { "GL_MESA_resize_buffers", o(MESA_resize_buffers), GL, 1999 },
296 { "GL_MESA_texture_array", o(MESA_texture_array), GLL, 2007 },
297 { "GL_MESA_texture_signed_rgba", o(EXT_texture_snorm), GL, 2009 },
298 { "GL_MESA_window_pos", o(dummy_true), GLL, 2000 },
299 { "GL_MESA_ycbcr_texture", o(MESA_ycbcr_texture), GL, 2002 },
300 { "GL_NV_blend_square", o(NV_blend_square), GLL, 1999 },
301 { "GL_NV_conditional_render", o(NV_conditional_render), GL, 2008 },
302 { "GL_NV_depth_clamp", o(ARB_depth_clamp), GL, 2001 },
303 { "GL_NV_draw_buffers", o(dummy_true), ES2, 2011 },
304 { "GL_NV_fbo_color_attachments", o(EXT_framebuffer_object), ES2, 2010 },
305 { "GL_NV_fog_distance", o(NV_fog_distance), GLL, 2001 },
306 { "GL_NV_fragment_program_option", o(NV_fragment_program_option), GLL, 2005 },
307 { "GL_NV_light_max_exponent", o(NV_light_max_exponent), GLL, 1999 },
308 { "GL_NV_packed_depth_stencil", o(EXT_packed_depth_stencil), GL, 2000 },
309 { "GL_NV_point_sprite", o(NV_point_sprite), GL, 2001 },
310 { "GL_NV_primitive_restart", o(NV_primitive_restart), GL, 2002 },
311 { "GL_NV_read_buffer", o(dummy_true), ES2, 2011 },
312 { "GL_NV_texgen_reflection", o(NV_texgen_reflection), GLL, 1999 },
313 { "GL_NV_texture_barrier", o(NV_texture_barrier), GL, 2009 },
314 { "GL_NV_texture_env_combine4", o(NV_texture_env_combine4), GLL, 1999 },
315 { "GL_NV_texture_rectangle", o(NV_texture_rectangle), GLL, 2000 },
316 { "GL_S3_s3tc", o(S3_s3tc), GL, 1999 },
317 { "GL_SGIS_generate_mipmap", o(dummy_true), GLL, 1997 },
318 { "GL_SGIS_texture_border_clamp", o(ARB_texture_border_clamp), GLL, 1997 },
319 { "GL_SGIS_texture_edge_clamp", o(dummy_true), GLL, 1997 },
320 { "GL_SGIS_texture_lod", o(SGIS_texture_lod), GLL, 1997 },
321 { "GL_SUN_multi_draw_arrays", o(dummy_true), GLL, 1999 },
322
323 { 0, 0, 0, 0 },
324 };
325
326
327 /**
328 * Given an extension name, lookup up the corresponding member of struct
329 * gl_extensions and return that member's offset (in bytes). If the name is
330 * not found in the \c extension_table, return 0.
331 *
332 * \param name Name of extension.
333 * \return Offset of member in struct gl_extensions.
334 */
335 static size_t
336 name_to_offset(const char* name)
337 {
338 const struct extension *i;
339
340 if (name == 0)
341 return 0;
342
343 for (i = extension_table; i->name != 0; ++i) {
344 if (strcmp(name, i->name) == 0)
345 return i->offset;
346 }
347
348 return 0;
349 }
350
351
352 /**
353 * \brief Extensions enabled by default.
354 *
355 * These extensions are enabled by _mesa_init_extensions().
356 *
357 * XXX: Should these defaults also apply to GLES?
358 */
359 static const size_t default_extensions[] = {
360 o(EXT_texture3D),
361
362 o(OES_standard_derivatives),
363
364 /* Vendor Extensions */
365 o(APPLE_packed_pixels),
366 o(IBM_multimode_draw_arrays),
367 o(IBM_rasterpos_clip),
368 o(NV_light_max_exponent),
369 o(NV_texgen_reflection),
370 o(SGIS_texture_lod),
371
372 0,
373 };
374
375
376 /**
377 * Enable all extensions suitable for a software-only renderer.
378 * This is a convenience function used by the XMesa, OSMesa, GGI drivers, etc.
379 */
380 void
381 _mesa_enable_sw_extensions(struct gl_context *ctx)
382 {
383 ctx->Extensions.ARB_depth_clamp = GL_TRUE;
384 ctx->Extensions.ARB_depth_texture = GL_TRUE;
385 ctx->Extensions.ARB_draw_elements_base_vertex = GL_TRUE;
386 ctx->Extensions.ARB_draw_instanced = GL_TRUE;
387 ctx->Extensions.ARB_explicit_attrib_location = GL_TRUE;
388 ctx->Extensions.ARB_fragment_coord_conventions = GL_TRUE;
389 ctx->Extensions.ARB_fragment_program = GL_TRUE;
390 ctx->Extensions.ARB_fragment_program_shadow = GL_TRUE;
391 ctx->Extensions.ARB_fragment_shader = GL_TRUE;
392 ctx->Extensions.ARB_framebuffer_object = GL_TRUE;
393 /* XXX re-enable when GLSL compiler again supports geometry shaders */
394 #if 0
395 ctx->Extensions.ARB_geometry_shader4 = GL_TRUE;
396 #endif
397 ctx->Extensions.ARB_half_float_pixel = GL_TRUE;
398 ctx->Extensions.ARB_half_float_vertex = GL_TRUE;
399 ctx->Extensions.ARB_map_buffer_range = GL_TRUE;
400 ctx->Extensions.ARB_occlusion_query = GL_TRUE;
401 ctx->Extensions.ARB_occlusion_query2 = GL_TRUE;
402 ctx->Extensions.ARB_point_sprite = GL_TRUE;
403 ctx->Extensions.ARB_shader_objects = GL_TRUE;
404 ctx->Extensions.EXT_separate_shader_objects = GL_TRUE;
405 ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
406 ctx->Extensions.ARB_shadow = GL_TRUE;
407 ctx->Extensions.ARB_texture_border_clamp = GL_TRUE;
408 ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
409 ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
410 ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
411 ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
412 /*ctx->Extensions.ARB_texture_float = GL_TRUE;*/
413 ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
414 ctx->Extensions.ARB_texture_rg = GL_TRUE;
415 ctx->Extensions.ARB_texture_compression_rgtc = GL_TRUE;
416 ctx->Extensions.ARB_texture_storage = GL_TRUE;
417 ctx->Extensions.ARB_vertex_program = GL_TRUE;
418 ctx->Extensions.ARB_vertex_shader = GL_TRUE;
419 ctx->Extensions.ARB_sync = GL_TRUE;
420 ctx->Extensions.APPLE_object_purgeable = GL_TRUE;
421 ctx->Extensions.ATI_envmap_bumpmap = GL_TRUE;
422 ctx->Extensions.ATI_fragment_shader = GL_TRUE;
423 ctx->Extensions.ATI_texture_compression_3dc = GL_TRUE;
424 ctx->Extensions.ATI_texture_env_combine3 = GL_TRUE;
425 ctx->Extensions.ATI_texture_mirror_once = GL_TRUE;
426 ctx->Extensions.ATI_separate_stencil = GL_TRUE;
427 ctx->Extensions.EXT_blend_color = GL_TRUE;
428 ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
429 ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
430 ctx->Extensions.EXT_blend_minmax = GL_TRUE;
431 ctx->Extensions.EXT_depth_bounds_test = GL_TRUE;
432 ctx->Extensions.EXT_draw_buffers2 = GL_TRUE;
433 ctx->Extensions.EXT_fog_coord = GL_TRUE;
434 ctx->Extensions.EXT_framebuffer_object = GL_TRUE;
435 ctx->Extensions.EXT_framebuffer_blit = GL_TRUE;
436 ctx->Extensions.EXT_framebuffer_multisample = GL_TRUE;
437 ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE;
438 ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
439 ctx->Extensions.EXT_point_parameters = GL_TRUE;
440 ctx->Extensions.EXT_provoking_vertex = GL_TRUE;
441 ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
442 ctx->Extensions.EXT_secondary_color = GL_TRUE;
443 ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
444 ctx->Extensions.EXT_texture_array = GL_TRUE;
445 ctx->Extensions.EXT_texture_compression_latc = GL_TRUE;
446 ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
447 ctx->Extensions.EXT_texture_filter_anisotropic = GL_TRUE;
448 ctx->Extensions.EXT_texture_mirror_clamp = GL_TRUE;
449 ctx->Extensions.EXT_texture_shared_exponent = GL_TRUE;
450 ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
451 ctx->Extensions.EXT_texture_sRGB_decode = GL_TRUE;
452 ctx->Extensions.EXT_texture_swizzle = GL_TRUE;
453 /*ctx->Extensions.EXT_transform_feedback = GL_TRUE;*/
454 ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE;
455 /*ctx->Extensions.IBM_multimode_draw_arrays = GL_TRUE;*/
456 ctx->Extensions.MESA_pack_invert = GL_TRUE;
457 ctx->Extensions.MESA_resize_buffers = GL_TRUE;
458 ctx->Extensions.MESA_texture_array = GL_TRUE;
459 ctx->Extensions.MESA_ycbcr_texture = GL_TRUE;
460 ctx->Extensions.NV_blend_square = GL_TRUE;
461 ctx->Extensions.NV_conditional_render = GL_TRUE;
462 /*ctx->Extensions.NV_light_max_exponent = GL_TRUE;*/
463 ctx->Extensions.NV_point_sprite = GL_TRUE;
464 ctx->Extensions.NV_texture_env_combine4 = GL_TRUE;
465 ctx->Extensions.NV_texture_rectangle = GL_TRUE;
466 /*ctx->Extensions.NV_texgen_reflection = GL_TRUE;*/
467 ctx->Extensions.NV_fragment_program_option = GL_TRUE;
468 ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE;
469 _mesa_enable_extension(ctx, "GL_3DFX_texture_compression_FXT1");
470 if (ctx->Mesa_DXTn) {
471 ctx->Extensions.ANGLE_texture_compression_dxt = GL_TRUE;
472 _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
473 _mesa_enable_extension(ctx, "GL_S3_s3tc");
474 }
475 }
476
477
478 /**
479 * Enable all OpenGL 1.3 features and extensions.
480 * A convenience function to be called by drivers.
481 */
482 void
483 _mesa_enable_1_3_extensions(struct gl_context *ctx)
484 {
485 ctx->Extensions.ARB_texture_border_clamp = GL_TRUE;
486 ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
487 ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
488 ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
489 }
490
491
492
493 /**
494 * Enable all OpenGL 1.4 features and extensions.
495 * A convenience function to be called by drivers.
496 */
497 void
498 _mesa_enable_1_4_extensions(struct gl_context *ctx)
499 {
500 ctx->Extensions.ARB_depth_texture = GL_TRUE;
501 ctx->Extensions.ARB_shadow = GL_TRUE;
502 ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
503 ctx->Extensions.EXT_blend_color = GL_TRUE;
504 ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
505 ctx->Extensions.EXT_blend_minmax = GL_TRUE;
506 ctx->Extensions.EXT_fog_coord = GL_TRUE;
507 ctx->Extensions.EXT_point_parameters = GL_TRUE;
508 ctx->Extensions.EXT_secondary_color = GL_TRUE;
509 }
510
511
512 /**
513 * Enable all OpenGL 1.5 features and extensions.
514 * A convenience function to be called by drivers.
515 */
516 void
517 _mesa_enable_1_5_extensions(struct gl_context *ctx)
518 {
519 ctx->Extensions.ARB_occlusion_query = GL_TRUE;
520 ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
521 }
522
523
524 /**
525 * Enable all OpenGL 2.0 features and extensions.
526 * A convenience function to be called by drivers.
527 */
528 void
529 _mesa_enable_2_0_extensions(struct gl_context *ctx)
530 {
531 ctx->Extensions.ARB_fragment_shader = GL_TRUE;
532 ctx->Extensions.ARB_point_sprite = GL_TRUE;
533 ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
534 ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
535 ctx->Extensions.ARB_shader_objects = GL_TRUE;
536 ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
537 ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
538 ctx->Extensions.ARB_vertex_shader = GL_TRUE;
539 }
540
541
542 /**
543 * Enable all OpenGL 2.1 features and extensions.
544 * A convenience function to be called by drivers.
545 */
546 void
547 _mesa_enable_2_1_extensions(struct gl_context *ctx)
548 {
549 ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
550 ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
551 }
552
553
554 /**
555 * Either enable or disable the named extension.
556 * \return GL_TRUE for success, GL_FALSE if invalid extension name
557 */
558 static GLboolean
559 set_extension( struct gl_context *ctx, const char *name, GLboolean state )
560 {
561 size_t offset;
562
563 if (ctx->Extensions.String) {
564 /* The string was already queried - can't change it now! */
565 _mesa_problem(ctx, "Trying to enable/disable extension after glGetString(GL_EXTENSIONS): %s", name);
566 return GL_FALSE;
567 }
568
569 offset = name_to_offset(name);
570 if (offset == 0) {
571 _mesa_problem(ctx, "Trying to enable/disable unknown extension %s",
572 name);
573 return GL_FALSE;
574 } else if (offset == o(dummy_true) && state == GL_FALSE) {
575 _mesa_problem(ctx, "Trying to disable a permanently enabled extension: "
576 "%s", name);
577 return GL_FALSE;
578 } else {
579 GLboolean *base = (GLboolean *) &ctx->Extensions;
580 base[offset] = state;
581 return GL_TRUE;
582 }
583 }
584
585
586 /**
587 * Enable the named extension.
588 * Typically called by drivers.
589 */
590 void
591 _mesa_enable_extension( struct gl_context *ctx, const char *name )
592 {
593 if (!set_extension(ctx, name, GL_TRUE))
594 _mesa_problem(ctx, "Trying to enable unknown extension: %s", name);
595 }
596
597
598 /**
599 * Disable the named extension.
600 * XXX is this really needed???
601 */
602 void
603 _mesa_disable_extension( struct gl_context *ctx, const char *name )
604 {
605 if (!set_extension(ctx, name, GL_FALSE))
606 _mesa_problem(ctx, "Trying to disable unknown extension: %s", name);
607 }
608
609
610 /**
611 * Test if the named extension is enabled in this context.
612 */
613 GLboolean
614 _mesa_extension_is_enabled( struct gl_context *ctx, const char *name )
615 {
616 size_t offset;
617 GLboolean *base;
618
619 if (name == 0)
620 return GL_FALSE;
621
622 offset = name_to_offset(name);
623 if (offset == 0)
624 return GL_FALSE;
625 base = (GLboolean *) &ctx->Extensions;
626 return base[offset];
627 }
628
629
630 /**
631 * \brief Apply the \c MESA_EXTENSION_OVERRIDE environment variable.
632 *
633 * \c MESA_EXTENSION_OVERRIDE is a space-separated list of extensions to
634 * enable or disable. The list is processed thus:
635 * - Enable recognized extension names that are prefixed with '+'.
636 * - Disable recognized extension names that are prefixed with '-'.
637 * - Enable recognized extension names that are not prefixed.
638 * - Collect unrecognized extension names in a new string.
639 *
640 * \return Space-separated list of unrecognized extension names (which must
641 * be freed). Does not return \c NULL.
642 */
643 static char *
644 get_extension_override( struct gl_context *ctx )
645 {
646 const char *env_const = _mesa_getenv("MESA_EXTENSION_OVERRIDE");
647 char *env;
648 char *ext;
649 char *extra_exts;
650 int len;
651
652 if (env_const == NULL) {
653 /* Return the empty string rather than NULL. This simplifies the logic
654 * of client functions. */
655 return calloc(4, sizeof(char));
656 }
657
658 /* extra_exts: List of unrecognized extensions. */
659 extra_exts = calloc(ALIGN(strlen(env_const) + 2, 4), sizeof(char));
660
661 /* Copy env_const because strtok() is destructive. */
662 env = strdup(env_const);
663 for (ext = strtok(env, " "); ext != NULL; ext = strtok(NULL, " ")) {
664 int enable;
665 int recognized;
666 switch (ext[0]) {
667 case '+':
668 enable = 1;
669 ++ext;
670 break;
671 case '-':
672 enable = 0;
673 ++ext;
674 break;
675 default:
676 enable = 1;
677 break;
678 }
679 recognized = set_extension(ctx, ext, enable);
680 if (!recognized) {
681 strcat(extra_exts, ext);
682 strcat(extra_exts, " ");
683 }
684 }
685
686 free(env);
687
688 /* Remove trailing space. */
689 len = strlen(extra_exts);
690 if (len > 0 && extra_exts[len - 1] == ' ')
691 extra_exts[len - 1] = '\0';
692
693 return extra_exts;
694 }
695
696
697 /**
698 * \brief Initialize extension tables and enable default extensions.
699 *
700 * This should be called during context initialization.
701 * Note: Sets gl_extensions.dummy_true to true.
702 */
703 void
704 _mesa_init_extensions( struct gl_context *ctx )
705 {
706 GLboolean *base = (GLboolean *) &ctx->Extensions;
707 GLboolean *sentinel = base + o(extension_sentinel);
708 GLboolean *i;
709 const size_t *j;
710
711 /* First, turn all extensions off. */
712 for (i = base; i != sentinel; ++i)
713 *i = GL_FALSE;
714
715 /* Then, selectively turn default extensions on. */
716 ctx->Extensions.dummy_true = GL_TRUE;
717 for (j = default_extensions; *j != 0; ++j)
718 base[*j] = GL_TRUE;
719 }
720
721
722 typedef unsigned short extension_index;
723
724
725 /**
726 * Compare two entries of the extensions table. Sorts first by year,
727 * then by name.
728 *
729 * Arguments are indices into extension_table.
730 */
731 static int
732 extension_compare(const void *p1, const void *p2)
733 {
734 extension_index i1 = * (const extension_index *) p1;
735 extension_index i2 = * (const extension_index *) p2;
736 const struct extension *e1 = &extension_table[i1];
737 const struct extension *e2 = &extension_table[i2];
738 int res;
739
740 res = (int)e1->year - (int)e2->year;
741
742 if (res == 0) {
743 res = strcmp(e1->name, e2->name);
744 }
745
746 return res;
747 }
748
749
750 /**
751 * Construct the GL_EXTENSIONS string. Called the first time that
752 * glGetString(GL_EXTENSIONS) is called.
753 */
754 GLubyte*
755 _mesa_make_extension_string(struct gl_context *ctx)
756 {
757 /* The extension string. */
758 char *exts = 0;
759 /* Length of extension string. */
760 size_t length = 0;
761 /* Number of extensions */
762 unsigned count;
763 /* Indices of the extensions sorted by year */
764 extension_index *extension_indices;
765 /* String of extra extensions. */
766 char *extra_extensions = get_extension_override(ctx);
767 GLboolean *base = (GLboolean *) &ctx->Extensions;
768 const struct extension *i;
769 unsigned j;
770 unsigned maxYear = ~0;
771
772 /* Check if the MESA_EXTENSION_MAX_YEAR env var is set */
773 {
774 const char *env = getenv("MESA_EXTENSION_MAX_YEAR");
775 if (env) {
776 maxYear = atoi(env);
777 _mesa_debug(ctx, "Note: limiting GL extensions to %u or earlier\n",
778 maxYear);
779 }
780 }
781
782 /* Compute length of the extension string. */
783 count = 0;
784 for (i = extension_table; i->name != 0; ++i) {
785 if (base[i->offset] &&
786 i->year <= maxYear &&
787 (i->api_set & (1 << ctx->API))) {
788 length += strlen(i->name) + 1; /* +1 for space */
789 ++count;
790 }
791 }
792 if (extra_extensions != NULL)
793 length += 1 + strlen(extra_extensions); /* +1 for space */
794
795 exts = calloc(ALIGN(length + 1, 4), sizeof(char));
796 if (exts == NULL) {
797 free(extra_extensions);
798 return NULL;
799 }
800
801 extension_indices = malloc(count * sizeof(extension_index));
802 if (extension_indices == NULL) {
803 free(exts);
804 free(extra_extensions);
805 return NULL;
806 }
807
808 /* Sort extensions in chronological order because certain old applications (e.g.,
809 * Quake3 demo) store the extension list in a static size buffer so chronologically
810 * order ensure that the extensions that such applications expect will fit into
811 * that buffer.
812 */
813 j = 0;
814 for (i = extension_table; i->name != 0; ++i) {
815 if (base[i->offset] &&
816 i->year <= maxYear &&
817 (i->api_set & (1 << ctx->API))) {
818 extension_indices[j++] = i - extension_table;
819 }
820 }
821 assert(j == count);
822 qsort(extension_indices, count, sizeof *extension_indices, extension_compare);
823
824 /* Build the extension string.*/
825 for (j = 0; j < count; ++j) {
826 i = &extension_table[extension_indices[j]];
827 assert(base[i->offset] && (i->api_set & (1 << ctx->API)));
828 strcat(exts, i->name);
829 strcat(exts, " ");
830 }
831 free(extension_indices);
832 if (extra_extensions != 0) {
833 strcat(exts, extra_extensions);
834 free(extra_extensions);
835 }
836
837 return (GLubyte *) exts;
838 }
839
840 /**
841 * Return number of enabled extensions.
842 */
843 GLuint
844 _mesa_get_extension_count(struct gl_context *ctx)
845 {
846 GLboolean *base;
847 const struct extension *i;
848
849 /* only count once */
850 if (ctx->Extensions.Count != 0)
851 return ctx->Extensions.Count;
852
853 base = (GLboolean *) &ctx->Extensions;
854 for (i = extension_table; i->name != 0; ++i) {
855 if (base[i->offset] && (i->api_set & (1 << ctx->API))) {
856 ctx->Extensions.Count++;
857 }
858 }
859 return ctx->Extensions.Count;
860 }
861
862 /**
863 * Return name of i-th enabled extension
864 */
865 const GLubyte *
866 _mesa_get_enabled_extension(struct gl_context *ctx, GLuint index)
867 {
868 const GLboolean *base;
869 size_t n;
870 const struct extension *i;
871
872 base = (GLboolean*) &ctx->Extensions;
873 n = 0;
874 for (i = extension_table; i->name != 0; ++i) {
875 if (base[i->offset] && (i->api_set & (1 << ctx->API))) {
876 if (n == index)
877 return (const GLubyte*) i->name;
878 else
879 ++n;
880 }
881 }
882
883 return NULL;
884 }