WebSVN – Kolibri OS – Blame – /programs/develop/libraries/Mesa/src/mesa/main/extensions.c

Rev	Author	Line No.	Line
1901	serge	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 "mtypes.h"
		38
		39	enum {
		40	DISABLE = 0,
		41	GL = 1 << API_OPENGL,
		42	ES1 = 1 << API_OPENGLES,
		43	ES2 = 1 << API_OPENGLES2,
		44	};
		45
		46	/**
		47	* \brief An element of the \c extension_table.
		48	*/
		49	struct extension {
		50	/** Name of extension, such as "GL_ARB_depth_clamp". */
		51	const char *name;
		52
		53	/** Offset (in bytes) of the corresponding member in struct gl_extensions. */
		54	size_t offset;
		55
		56	/** Set of API's in which the extension exists, as a bitset. */
		57	uint8_t api_set;
		58	};
		59
		60
		61	/**
		62	* Given a member \c x of struct gl_extensions, return offset of
		63	* \c x in bytes.
		64	*/
		65	#define o(x) offsetof(struct gl_extensions, x)
		66
		67
		68	/**
		69	* \brief Table of supported OpenGL extensions for all API's.
		70	*
		71	* Note: The GL_MESAX_* extensions are placeholders for future ARB extensions.
		72	*/
		73	static const struct extension extension_table[] = {
		74	/* ARB Extensions */
		75	{ "GL_ARB_ES2_compatibility", o(ARB_ES2_compatibility), GL },
		76	{ "GL_ARB_blend_func_extended", o(ARB_blend_func_extended), GL },
		77	{ "GL_ARB_copy_buffer", o(ARB_copy_buffer), GL },
		78	{ "GL_ARB_depth_buffer_float", o(ARB_depth_buffer_float), GL },
		79	{ "GL_ARB_depth_clamp", o(ARB_depth_clamp), GL },
		80	{ "GL_ARB_depth_texture", o(ARB_depth_texture), GL },
		81	{ "GL_ARB_draw_buffers", o(ARB_draw_buffers), GL },
		82	{ "GL_ARB_draw_elements_base_vertex", o(ARB_draw_elements_base_vertex), GL },
		83	{ "GL_ARB_draw_instanced", o(ARB_draw_instanced), GL },
		84	{ "GL_ARB_explicit_attrib_location", o(ARB_explicit_attrib_location), GL },
		85	{ "GL_ARB_fragment_coord_conventions", o(ARB_fragment_coord_conventions), GL },
		86	{ "GL_ARB_fragment_program", o(ARB_fragment_program), GL },
		87	{ "GL_ARB_fragment_program_shadow", o(ARB_fragment_program_shadow), GL },
		88	{ "GL_ARB_fragment_shader", o(ARB_fragment_shader), GL },
		89	{ "GL_ARB_framebuffer_object", o(ARB_framebuffer_object), GL },
		90	{ "GL_ARB_half_float_pixel", o(ARB_half_float_pixel), GL },
		91	{ "GL_ARB_half_float_vertex", o(ARB_half_float_vertex), GL },
		92	{ "GL_ARB_instanced_arrays", o(ARB_instanced_arrays), GL },
		93	{ "GL_ARB_map_buffer_range", o(ARB_map_buffer_range), GL },
		94	{ "GL_ARB_multisample", o(ARB_multisample), GL },
		95	{ "GL_ARB_multitexture", o(ARB_multitexture), GL },
		96	{ "GL_ARB_occlusion_query2", o(ARB_occlusion_query2), GL },
		97	{ "GL_ARB_occlusion_query", o(ARB_occlusion_query), GL },
		98	{ "GL_ARB_pixel_buffer_object", o(EXT_pixel_buffer_object), GL },
		99	{ "GL_ARB_point_parameters", o(EXT_point_parameters), GL },
		100	{ "GL_ARB_point_sprite", o(ARB_point_sprite), GL },
		101	{ "GL_ARB_provoking_vertex", o(EXT_provoking_vertex), GL },
		102	{ "GL_ARB_sampler_objects", o(ARB_sampler_objects), GL },
		103	{ "GL_ARB_seamless_cube_map", o(ARB_seamless_cube_map), GL },
		104	{ "GL_ARB_shader_objects", o(ARB_shader_objects), GL },
		105	{ "GL_ARB_shader_stencil_export", o(ARB_shader_stencil_export), GL },
		106	{ "GL_ARB_shading_language_100", o(ARB_shading_language_100), GL },
		107	{ "GL_ARB_shadow_ambient", o(ARB_shadow_ambient), GL },
		108	{ "GL_ARB_shadow", o(ARB_shadow), GL },
		109	{ "GL_ARB_sync", o(ARB_sync), GL },
		110	{ "GL_ARB_texture_border_clamp", o(ARB_texture_border_clamp), GL },
		111	{ "GL_ARB_texture_buffer_object", o(ARB_texture_buffer_object), GL },
		112	{ "GL_ARB_texture_compression", o(ARB_texture_compression), GL },
		113	{ "GL_ARB_texture_compression_rgtc", o(ARB_texture_compression_rgtc), GL },
		114	{ "GL_ARB_texture_cube_map", o(ARB_texture_cube_map), GL },
		115	{ "GL_ARB_texture_env_add", o(EXT_texture_env_add), GL },
		116	{ "GL_ARB_texture_env_combine", o(ARB_texture_env_combine), GL },
		117	{ "GL_ARB_texture_env_crossbar", o(ARB_texture_env_crossbar), GL },
		118	{ "GL_ARB_texture_env_dot3", o(ARB_texture_env_dot3), GL },
		119	{ "GL_ARB_texture_mirrored_repeat", o(ARB_texture_mirrored_repeat), GL },
		120	{ "GL_ARB_texture_multisample", o(ARB_texture_multisample), GL },
		121	{ "GL_ARB_texture_non_power_of_two", o(ARB_texture_non_power_of_two), GL },
		122	{ "GL_ARB_texture_rectangle", o(NV_texture_rectangle), GL },
		123	{ "GL_ARB_texture_rgb10_a2ui", o(ARB_texture_rgb10_a2ui), GL },
		124	{ "GL_ARB_texture_rg", o(ARB_texture_rg), GL },
		125	{ "GL_ARB_texture_swizzle", o(EXT_texture_swizzle), GL },
		126	{ "GL_ARB_transform_feedback2", o(ARB_transform_feedback2), GL },
		127	{ "GL_ARB_transpose_matrix", o(ARB_transpose_matrix), GL },
		128	{ "GL_ARB_uniform_buffer_object", o(ARB_uniform_buffer_object), GL },
		129	{ "GL_ARB_vertex_array_bgra", o(EXT_vertex_array_bgra), GL },
		130	{ "GL_ARB_vertex_array_object", o(ARB_vertex_array_object), GL },
		131	{ "GL_ARB_vertex_buffer_object", o(ARB_vertex_buffer_object), GL },
		132	{ "GL_ARB_vertex_program", o(ARB_vertex_program), GL },
		133	{ "GL_ARB_vertex_shader", o(ARB_vertex_shader), GL },
		134	{ "GL_ARB_vertex_type_2_10_10_10_rev", o(ARB_vertex_type_2_10_10_10_rev), GL },
		135	{ "GL_ARB_window_pos", o(ARB_window_pos), GL },
		136
		137	/* EXT extensions */
		138	{ "GL_EXT_abgr", o(EXT_abgr), GL },
		139	{ "GL_EXT_bgra", o(EXT_bgra), GL },
		140	{ "GL_EXT_blend_color", o(EXT_blend_color), GL },
		141	{ "GL_EXT_blend_equation_separate", o(EXT_blend_equation_separate), GL },
		142	{ "GL_EXT_blend_func_separate", o(EXT_blend_func_separate), GL },
		143	{ "GL_EXT_blend_logic_op", o(EXT_blend_logic_op), GL },
		144	{ "GL_EXT_blend_minmax", o(EXT_blend_minmax), GL \| ES1 \| ES2 },
		145	{ "GL_EXT_blend_subtract", o(EXT_blend_subtract), GL },
		146	{ "GL_EXT_clip_volume_hint", o(EXT_clip_volume_hint), GL },
		147	{ "GL_EXT_compiled_vertex_array", o(EXT_compiled_vertex_array), GL },
		148	{ "GL_EXT_copy_texture", o(EXT_copy_texture), GL },
		149	{ "GL_EXT_depth_bounds_test", o(EXT_depth_bounds_test), GL },
		150	{ "GL_EXT_draw_buffers2", o(EXT_draw_buffers2), GL },
		151	{ "GL_EXT_draw_instanced", o(ARB_draw_instanced), GL },
		152	{ "GL_EXT_draw_range_elements", o(EXT_draw_range_elements), GL },
		153	{ "GL_EXT_fog_coord", o(EXT_fog_coord), GL },
		154	{ "GL_EXT_framebuffer_blit", o(EXT_framebuffer_blit), GL },
		155	{ "GL_EXT_framebuffer_multisample", o(EXT_framebuffer_multisample), GL },
		156	{ "GL_EXT_framebuffer_object", o(EXT_framebuffer_object), GL },
		157	{ "GL_EXT_framebuffer_sRGB", o(EXT_framebuffer_sRGB), GL },
		158	{ "GL_EXT_gpu_program_parameters", o(EXT_gpu_program_parameters), GL },
		159	{ "GL_EXT_gpu_shader4", o(EXT_gpu_shader4), GL },
		160	{ "GL_EXT_multi_draw_arrays", o(EXT_multi_draw_arrays), GL \| ES1 \| ES2 },
		161	{ "GL_EXT_packed_depth_stencil", o(EXT_packed_depth_stencil), GL },
		162	{ "GL_EXT_packed_float", o(EXT_packed_float), GL },
		163	{ "GL_EXT_packed_pixels", o(EXT_packed_pixels), GL },
		164	{ "GL_EXT_paletted_texture", o(EXT_paletted_texture), GL },
		165	{ "GL_EXT_pixel_buffer_object", o(EXT_pixel_buffer_object), GL },
		166	{ "GL_EXT_point_parameters", o(EXT_point_parameters), GL },
		167	{ "GL_EXT_polygon_offset", o(EXT_polygon_offset), GL },
		168	{ "GL_EXT_provoking_vertex", o(EXT_provoking_vertex), GL },
		169	{ "GL_EXT_rescale_normal", o(EXT_rescale_normal), GL },
		170	{ "GL_EXT_secondary_color", o(EXT_secondary_color), GL },
		171	{ "GL_EXT_separate_shader_objects", o(EXT_separate_shader_objects), GL },
		172	{ "GL_EXT_separate_specular_color", o(EXT_separate_specular_color), GL },
		173	{ "GL_EXT_shadow_funcs", o(EXT_shadow_funcs), GL },
		174	{ "GL_EXT_shared_texture_palette", o(EXT_shared_texture_palette), GL },
		175	{ "GL_EXT_stencil_two_side", o(EXT_stencil_two_side), GL },
		176	{ "GL_EXT_stencil_wrap", o(EXT_stencil_wrap), GL },
		177	{ "GL_EXT_subtexture", o(EXT_subtexture), GL },
		178	{ "GL_EXT_texture3D", o(EXT_texture3D), GL },
		179	{ "GL_EXT_texture_array", o(EXT_texture_array), GL },
		180	{ "GL_EXT_texture_compression_dxt1", o(EXT_texture_compression_s3tc), GL \| ES1 \| ES2 },
		181	{ "GL_EXT_texture_compression_rgtc", o(ARB_texture_compression_rgtc), GL },
		182	{ "GL_EXT_texture_compression_s3tc", o(EXT_texture_compression_s3tc), GL },
		183	{ "GL_EXT_texture_cube_map", o(ARB_texture_cube_map), GL },
		184	{ "GL_EXT_texture_edge_clamp", o(SGIS_texture_edge_clamp), GL },
		185	{ "GL_EXT_texture_env_add", o(EXT_texture_env_add), GL },
		186	{ "GL_EXT_texture_env_combine", o(EXT_texture_env_combine), GL },
		187	{ "GL_EXT_texture_env_dot3", o(EXT_texture_env_dot3), GL },
		188	{ "GL_EXT_texture_filter_anisotropic", o(EXT_texture_filter_anisotropic), GL \| ES1 \| ES2 },
		189	{ "GL_EXT_texture_format_BGRA8888", o(EXT_texture_format_BGRA8888), ES1 \| ES2 },
		190	{ "GL_EXT_texture_integer", o(EXT_texture_integer), GL },
		191	{ "GL_EXT_texture_lod_bias", o(EXT_texture_lod_bias), GL \| ES1 },
		192	{ "GL_EXT_texture_mirror_clamp", o(EXT_texture_mirror_clamp), GL },
		193	{ "GL_EXT_texture_object", o(EXT_texture_object), GL },
		194	{ "GL_EXT_texture", o(EXT_texture), GL },
		195	{ "GL_EXT_texture_rectangle", o(NV_texture_rectangle), GL },
		196	{ "GL_EXT_texture_shared_exponent", o(EXT_texture_shared_exponent), GL },
		197	{ "GL_EXT_texture_sRGB", o(EXT_texture_sRGB), GL },
		198	{ "GL_EXT_texture_swizzle", o(EXT_texture_swizzle), GL },
		199	{ "GL_EXT_texture_type_2_10_10_10_REV", o(dummy_true), ES2 },
		200	{ "GL_EXT_timer_query", o(EXT_timer_query), GL },
		201	{ "GL_EXT_transform_feedback", o(EXT_transform_feedback), GL },
		202	{ "GL_EXT_vertex_array_bgra", o(EXT_vertex_array_bgra), GL },
		203	{ "GL_EXT_vertex_array", o(EXT_vertex_array), GL },
		204	{ "GL_EXT_vertex_array_set", o(EXT_vertex_array_set), GL },
		205
		206	/* OES extensions */
		207	{ "GL_OES_blend_equation_separate", o(EXT_blend_equation_separate), ES1 },
		208	{ "GL_OES_blend_func_separate", o(EXT_blend_func_separate), ES1 },
		209	{ "GL_OES_blend_subtract", o(EXT_blend_subtract), ES1 },
		210	{ "GL_OES_byte_coordinates", o(dummy_true), ES1 },
		211	{ "GL_OES_compressed_paletted_texture", o(dummy_false), DISABLE },
		212	{ "GL_OES_depth24", o(EXT_framebuffer_object), ES1 \| ES2 },
		213	{ "GL_OES_depth32", o(dummy_false), DISABLE },
		214	{ "GL_OES_depth_texture", o(ARB_depth_texture), ES2 },
		215	#if FEATURE_OES_draw_texture
		216	{ "GL_OES_draw_texture", o(OES_draw_texture), ES1 \| ES2 },
		217	#endif
		218	#if FEATURE_OES_EGL_image
		219	/* FIXME: Mesa expects GL_OES_EGL_image to be available in OpenGL contexts. */
		220	{ "GL_OES_EGL_image", o(OES_EGL_image), GL \| ES1 \| ES2 },
		221	#endif
		222	{ "GL_OES_element_index_uint", o(EXT_vertex_array), ES1 \| ES2 },
		223	{ "GL_OES_fbo_render_mipmap", o(EXT_framebuffer_object), ES1 \| ES2 },
		224	{ "GL_OES_fixed_point", o(dummy_true), ES1 },
		225	{ "GL_OES_framebuffer_object", o(EXT_framebuffer_object), ES1 },
		226	{ "GL_OES_mapbuffer", o(ARB_vertex_buffer_object), ES1 \| ES2 },
		227	{ "GL_OES_matrix_get", o(dummy_true), ES1 },
		228	{ "GL_OES_packed_depth_stencil", o(EXT_packed_depth_stencil), ES1 \| ES2 },
		229	{ "GL_OES_point_size_array", o(dummy_true), ES1 },
		230	{ "GL_OES_point_sprite", o(ARB_point_sprite), ES1 },
		231	{ "GL_OES_query_matrix", o(dummy_true), ES1 },
		232	{ "GL_OES_read_format", o(OES_read_format), GL \| ES1 },
		233	{ "GL_OES_rgb8_rgba8", o(EXT_framebuffer_object), ES1 \| ES2 },
		234	{ "GL_OES_single_precision", o(dummy_true), ES1 },
		235	{ "GL_OES_standard_derivatives", o(OES_standard_derivatives), ES2 },
		236	{ "GL_OES_stencil1", o(dummy_false), DISABLE },
		237	{ "GL_OES_stencil4", o(dummy_false), DISABLE },
		238	{ "GL_OES_stencil8", o(EXT_framebuffer_object), ES1 \| ES2 },
		239	{ "GL_OES_stencil_wrap", o(EXT_stencil_wrap), ES1 },
		240	/* GL_OES_texture_3D is disabled due to missing GLSL support. */
		241	{ "GL_OES_texture_3D", o(EXT_texture3D), DISABLE },
		242	{ "GL_OES_texture_cube_map", o(ARB_texture_cube_map), ES1 },
		243	{ "GL_OES_texture_env_crossbar", o(ARB_texture_env_crossbar), ES1 },
		244	{ "GL_OES_texture_mirrored_repeat", o(ARB_texture_mirrored_repeat), ES1 },
		245	{ "GL_OES_texture_npot", o(ARB_texture_non_power_of_two), ES2 },
		246
		247	/* Vendor extensions */
		248	{ "GL_3DFX_texture_compression_FXT1", o(TDFX_texture_compression_FXT1), GL },
		249	{ "GL_APPLE_client_storage", o(APPLE_client_storage), GL },
		250	{ "GL_APPLE_object_purgeable", o(APPLE_object_purgeable), GL },
		251	{ "GL_APPLE_packed_pixels", o(APPLE_packed_pixels), GL },
		252	{ "GL_APPLE_vertex_array_object", o(APPLE_vertex_array_object), GL },
		253	{ "GL_ATI_blend_equation_separate", o(EXT_blend_equation_separate), GL },
		254	{ "GL_ATI_envmap_bumpmap", o(ATI_envmap_bumpmap), GL },
		255	{ "GL_ATI_fragment_shader", o(ATI_fragment_shader), GL },
		256	{ "GL_ATI_separate_stencil", o(ATI_separate_stencil), GL },
		257	{ "GL_ATI_texture_env_combine3", o(ATI_texture_env_combine3), GL },
		258	{ "GL_ATI_texture_mirror_once", o(ATI_texture_mirror_once), GL },
		259	{ "GL_IBM_multimode_draw_arrays", o(IBM_multimode_draw_arrays), GL },
		260	{ "GL_IBM_rasterpos_clip", o(IBM_rasterpos_clip), GL },
		261	{ "GL_IBM_texture_mirrored_repeat", o(ARB_texture_mirrored_repeat), GL },
		262	{ "GL_INGR_blend_func_separate", o(EXT_blend_func_separate), GL },
		263	{ "GL_MESA_pack_invert", o(MESA_pack_invert), GL },
		264	{ "GL_MESA_resize_buffers", o(MESA_resize_buffers), GL },
		265	{ "GL_MESA_texture_array", o(MESA_texture_array), GL },
		266	{ "GL_MESA_texture_signed_rgba", o(MESA_texture_signed_rgba), GL },
		267	{ "GL_MESA_window_pos", o(ARB_window_pos), GL },
		268	{ "GL_MESAX_texture_float", o(ARB_texture_float), GL },
		269	{ "GL_MESA_ycbcr_texture", o(MESA_ycbcr_texture), GL },
		270	{ "GL_NV_blend_square", o(NV_blend_square), GL },
		271	{ "GL_NV_conditional_render", o(NV_conditional_render), GL },
		272	{ "GL_NV_depth_clamp", o(ARB_depth_clamp), GL },
		273	{ "GL_NV_fragment_program", o(NV_fragment_program), GL },
		274	{ "GL_NV_fragment_program_option", o(NV_fragment_program_option), GL },
		275	{ "GL_NV_light_max_exponent", o(NV_light_max_exponent), GL },
		276	{ "GL_NV_packed_depth_stencil", o(EXT_packed_depth_stencil), GL },
		277	{ "GL_NV_point_sprite", o(NV_point_sprite), GL },
		278	{ "GL_NV_primitive_restart", o(NV_primitive_restart), GL },
		279	{ "GL_NV_texgen_reflection", o(NV_texgen_reflection), GL },
		280	{ "GL_NV_texture_env_combine4", o(NV_texture_env_combine4), GL },
		281	{ "GL_NV_texture_rectangle", o(NV_texture_rectangle), GL },
		282	{ "GL_NV_vertex_program1_1", o(NV_vertex_program1_1), GL },
		283	{ "GL_NV_vertex_program", o(NV_vertex_program), GL },
		284	{ "GL_S3_s3tc", o(S3_s3tc), GL },
		285	{ "GL_SGIS_generate_mipmap", o(SGIS_generate_mipmap), GL },
		286	{ "GL_SGIS_texture_border_clamp", o(ARB_texture_border_clamp), GL },
		287	{ "GL_SGIS_texture_edge_clamp", o(SGIS_texture_edge_clamp), GL },
		288	{ "GL_SGIS_texture_lod", o(SGIS_texture_lod), GL },
		289	{ "GL_SGI_texture_color_table", o(SGI_texture_color_table), GL },
		290	{ "GL_SUN_multi_draw_arrays", o(EXT_multi_draw_arrays), GL },
		291
		292	{ 0, 0, 0 },
		293	};
		294
		295
		296	/**
		297	* Given an extension name, lookup up the corresponding member of struct
		298	* gl_extensions and return that member's offset (in bytes). If the name is
		299	* not found in the \c extension_table, return 0.
		300	*
		301	* \param name Name of extension.
		302	* \return Offset of member in struct gl_extensions.
		303	*/
		304	static size_t
		305	name_to_offset(const char* name)
		306	{
		307	const struct extension *i;
		308
		309	if (name == 0)
		310	return 0;
		311
		312	for (i = extension_table; i->name != 0; ++i) {
		313	if (strcmp(name, i->name) == 0)
		314	return i->offset;
		315	}
		316
		317	return 0;
		318	}
		319
		320
		321	/**
		322	* \brief Extensions enabled by default.
		323	*
		324	* These extensions are enabled by _mesa_init_extensions().
		325	*
		326	* XXX: Should these defaults also apply to GLES?
		327	*/
		328	static const size_t default_extensions[] = {
		329	o(ARB_copy_buffer),
		330	o(ARB_draw_buffers),
		331	o(ARB_multisample),
		332	o(ARB_texture_compression),
		333	o(ARB_transpose_matrix),
		334	o(ARB_vertex_buffer_object),
		335	o(ARB_window_pos),
		336
		337	o(EXT_abgr),
		338	o(EXT_bgra),
		339	o(EXT_compiled_vertex_array),
		340	o(EXT_copy_texture),
		341	o(EXT_draw_range_elements),
		342	o(EXT_multi_draw_arrays),
		343	o(EXT_packed_pixels),
		344	o(EXT_polygon_offset),
		345	o(EXT_rescale_normal),
		346	o(EXT_separate_specular_color),
		347	o(EXT_subtexture),
		348	o(EXT_texture),
		349	o(EXT_texture3D),
		350	o(EXT_texture_object),
		351	o(EXT_vertex_array),
		352
		353	o(OES_read_format),
		354	o(OES_standard_derivatives),
		355
		356	/* Vendor Extensions */
		357	o(APPLE_packed_pixels),
		358	o(IBM_multimode_draw_arrays),
		359	o(IBM_rasterpos_clip),
		360	o(NV_light_max_exponent),
		361	o(NV_texgen_reflection),
		362	o(SGIS_generate_mipmap),
		363	o(SGIS_texture_edge_clamp),
		364	o(SGIS_texture_lod),
		365
		366	0,
		367	};
		368
		369
		370	/**
		371	* Enable all extensions suitable for a software-only renderer.
		372	* This is a convenience function used by the XMesa, OSMesa, GGI drivers, etc.
		373	*/
		374	void
		375	_mesa_enable_sw_extensions(struct gl_context *ctx)
		376	{
		377	/ctx->Extensions.ARB_copy_buffer = GL_TRUE;/
		378	ctx->Extensions.ARB_depth_clamp = GL_TRUE;
		379	ctx->Extensions.ARB_depth_texture = GL_TRUE;
		380	/ctx->Extensions.ARB_draw_buffers = GL_TRUE;/
		381	ctx->Extensions.ARB_draw_elements_base_vertex = GL_TRUE;
		382	ctx->Extensions.ARB_explicit_attrib_location = GL_TRUE;
		383	ctx->Extensions.ARB_fragment_coord_conventions = GL_TRUE;
		384	#if FEATURE_ARB_fragment_program
		385	ctx->Extensions.ARB_fragment_program = GL_TRUE;
		386	ctx->Extensions.ARB_fragment_program_shadow = GL_TRUE;
		387	#endif
		388	#if FEATURE_ARB_fragment_shader
		389	ctx->Extensions.ARB_fragment_shader = GL_TRUE;
		390	#endif
		391	#if FEATURE_ARB_framebuffer_object
		392	ctx->Extensions.ARB_framebuffer_object = GL_TRUE;
		393	#endif
		394	#if FEATURE_ARB_geometry_shader4 && 0
		395	/* XXX re-enable when GLSL compiler again supports geometry shaders */
		396	ctx->Extensions.ARB_geometry_shader4 = GL_TRUE;
		397	#endif
		398	ctx->Extensions.ARB_half_float_pixel = GL_TRUE;
		399	ctx->Extensions.ARB_half_float_vertex = GL_TRUE;
		400	ctx->Extensions.ARB_map_buffer_range = GL_TRUE;
		401	ctx->Extensions.ARB_multitexture = GL_TRUE;
		402	#if FEATURE_queryobj
		403	ctx->Extensions.ARB_occlusion_query = GL_TRUE;
		404	#endif
		405	ctx->Extensions.ARB_point_sprite = GL_TRUE;
		406	#if FEATURE_ARB_shader_objects
		407	ctx->Extensions.ARB_shader_objects = GL_TRUE;
		408	ctx->Extensions.EXT_separate_shader_objects = GL_TRUE;
		409	#endif
		410	#if FEATURE_ARB_shading_language_100
		411	ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
		412	#endif
		413	ctx->Extensions.ARB_shadow = GL_TRUE;
		414	ctx->Extensions.ARB_shadow_ambient = GL_TRUE;
		415	ctx->Extensions.ARB_texture_border_clamp = GL_TRUE;
		416	ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
		417	ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
		418	ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
		419	ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
		420	/ctx->Extensions.ARB_texture_float = GL_TRUE;/
		421	ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE;
		422	ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
		423	ctx->Extensions.ARB_texture_rg = GL_TRUE;
		424	ctx->Extensions.ARB_vertex_array_object = GL_TRUE;
		425	#if FEATURE_ARB_vertex_program
		426	ctx->Extensions.ARB_vertex_program = GL_TRUE;
		427	#endif
		428	#if FEATURE_ARB_vertex_shader
		429	ctx->Extensions.ARB_vertex_shader = GL_TRUE;
		430	#endif
		431	#if FEATURE_ARB_vertex_buffer_object
		432	/ctx->Extensions.ARB_vertex_buffer_object = GL_TRUE;/
		433	#endif
		434	#if FEATURE_ARB_sync
		435	ctx->Extensions.ARB_sync = GL_TRUE;
		436	#endif
		437	ctx->Extensions.APPLE_vertex_array_object = GL_TRUE;
		438	#if FEATURE_APPLE_object_purgeable
		439	ctx->Extensions.APPLE_object_purgeable = GL_TRUE;
		440	#endif
		441	ctx->Extensions.ATI_envmap_bumpmap = GL_TRUE;
		442	#if FEATURE_ATI_fragment_shader
		443	ctx->Extensions.ATI_fragment_shader = GL_TRUE;
		444	#endif
		445	ctx->Extensions.ATI_texture_env_combine3 = GL_TRUE;
		446	ctx->Extensions.ATI_texture_mirror_once = GL_TRUE;
		447	ctx->Extensions.ATI_separate_stencil = GL_TRUE;
		448	ctx->Extensions.EXT_blend_color = GL_TRUE;
		449	ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
		450	ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
		451	ctx->Extensions.EXT_blend_logic_op = GL_TRUE;
		452	ctx->Extensions.EXT_blend_minmax = GL_TRUE;
		453	ctx->Extensions.EXT_blend_subtract = GL_TRUE;
		454	ctx->Extensions.EXT_depth_bounds_test = GL_TRUE;
		455	ctx->Extensions.EXT_draw_buffers2 = GL_TRUE;
		456	ctx->Extensions.EXT_fog_coord = GL_TRUE;
		457	#if FEATURE_EXT_framebuffer_object
		458	ctx->Extensions.EXT_framebuffer_object = GL_TRUE;
		459	#endif
		460	#if FEATURE_EXT_framebuffer_blit
		461	ctx->Extensions.EXT_framebuffer_blit = GL_TRUE;
		462	#endif
		463	#if FEATURE_ARB_framebuffer_object
		464	ctx->Extensions.EXT_framebuffer_multisample = GL_TRUE;
		465	#endif
		466	/ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;/
		467	ctx->Extensions.EXT_packed_depth_stencil = GL_TRUE;
		468	ctx->Extensions.EXT_paletted_texture = GL_TRUE;
		469	#if FEATURE_EXT_pixel_buffer_object
		470	ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
		471	#endif
		472	ctx->Extensions.EXT_point_parameters = GL_TRUE;
		473	ctx->Extensions.EXT_provoking_vertex = GL_TRUE;
		474	ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
		475	ctx->Extensions.EXT_secondary_color = GL_TRUE;
		476	ctx->Extensions.EXT_shared_texture_palette = GL_TRUE;
		477	ctx->Extensions.EXT_stencil_wrap = GL_TRUE;
		478	ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
		479	ctx->Extensions.EXT_texture_array = GL_TRUE;
		480	ctx->Extensions.EXT_texture_env_add = GL_TRUE;
		481	ctx->Extensions.EXT_texture_env_combine = GL_TRUE;
		482	ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
		483	ctx->Extensions.EXT_texture_mirror_clamp = GL_TRUE;
		484	ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;
		485	#if FEATURE_EXT_texture_sRGB
		486	ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
		487	#endif
		488	ctx->Extensions.EXT_texture_swizzle = GL_TRUE;
		489	#if FEATURE_EXT_transform_feedback
		490	/ctx->Extensions.EXT_transform_feedback = GL_TRUE;/
		491	#endif
		492	ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE;
		493	/ctx->Extensions.IBM_multimode_draw_arrays = GL_TRUE;/
		494	ctx->Extensions.MESA_pack_invert = GL_TRUE;
		495	ctx->Extensions.MESA_resize_buffers = GL_TRUE;
		496	ctx->Extensions.MESA_texture_array = GL_TRUE;
		497	ctx->Extensions.MESA_ycbcr_texture = GL_TRUE;
		498	ctx->Extensions.NV_blend_square = GL_TRUE;
		499	ctx->Extensions.NV_conditional_render = GL_TRUE;
		500	/ctx->Extensions.NV_light_max_exponent = GL_TRUE;/
		501	ctx->Extensions.NV_point_sprite = GL_TRUE;
		502	ctx->Extensions.NV_texture_env_combine4 = GL_TRUE;
		503	ctx->Extensions.NV_texture_rectangle = GL_TRUE;
		504	/ctx->Extensions.NV_texgen_reflection = GL_TRUE;/
		505	#if FEATURE_NV_vertex_program
		506	ctx->Extensions.NV_vertex_program = GL_TRUE;
		507	ctx->Extensions.NV_vertex_program1_1 = GL_TRUE;
		508	#endif
		509	#if FEATURE_NV_fragment_program
		510	ctx->Extensions.NV_fragment_program = GL_TRUE;
		511	#endif
		512	#if FEATURE_NV_fragment_program && FEATURE_ARB_fragment_program
		513	ctx->Extensions.NV_fragment_program_option = GL_TRUE;
		514	#endif
		515	ctx->Extensions.SGI_texture_color_table = GL_TRUE;
		516	/ctx->Extensions.SGIS_generate_mipmap = GL_TRUE;/
		517	ctx->Extensions.SGIS_texture_edge_clamp = GL_TRUE;
		518	#if FEATURE_ARB_vertex_program \|\| FEATURE_ARB_fragment_program
		519	ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE;
		520	#endif
		521	#if FEATURE_texture_fxt1
		522	_mesa_enable_extension(ctx, "GL_3DFX_texture_compression_FXT1");
		523	#endif
		524	#if FEATURE_texture_s3tc
		525	if (ctx->Mesa_DXTn) {
		526	_mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
		527	_mesa_enable_extension(ctx, "GL_S3_s3tc");
		528	}
		529	#endif
		530	}
		531
		532
		533	/**
		534	* Enable common EXT extensions in the ARB_imaging subset.
		535	*/
		536	void
		537	_mesa_enable_imaging_extensions(struct gl_context *ctx)
		538	{
		539	ctx->Extensions.EXT_blend_color = GL_TRUE;
		540	ctx->Extensions.EXT_blend_logic_op = GL_TRUE;
		541	ctx->Extensions.EXT_blend_minmax = GL_TRUE;
		542	ctx->Extensions.EXT_blend_subtract = GL_TRUE;
		543	}
		544
		545
		546
		547	/**
		548	* Enable all OpenGL 1.3 features and extensions.
		549	* A convenience function to be called by drivers.
		550	*/
		551	void
		552	_mesa_enable_1_3_extensions(struct gl_context *ctx)
		553	{
		554	/ctx->Extensions.ARB_multisample = GL_TRUE;/
		555	ctx->Extensions.ARB_multitexture = GL_TRUE;
		556	ctx->Extensions.ARB_texture_border_clamp = GL_TRUE;
		557	/ctx->Extensions.ARB_texture_compression = GL_TRUE;/
		558	ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
		559	ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
		560	ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
		561	ctx->Extensions.EXT_texture_env_add = GL_TRUE;
		562	/ctx->Extensions.ARB_transpose_matrix = GL_TRUE;/
		563	}
		564
		565
		566
		567	/**
		568	* Enable all OpenGL 1.4 features and extensions.
		569	* A convenience function to be called by drivers.
		570	*/
		571	void
		572	_mesa_enable_1_4_extensions(struct gl_context *ctx)
		573	{
		574	ctx->Extensions.ARB_depth_texture = GL_TRUE;
		575	ctx->Extensions.ARB_shadow = GL_TRUE;
		576	ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
		577	ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE;
		578	ctx->Extensions.ARB_window_pos = GL_TRUE;
		579	ctx->Extensions.EXT_blend_color = GL_TRUE;
		580	ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
		581	ctx->Extensions.EXT_blend_minmax = GL_TRUE;
		582	ctx->Extensions.EXT_blend_subtract = GL_TRUE;
		583	ctx->Extensions.EXT_fog_coord = GL_TRUE;
		584	/ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;/
		585	ctx->Extensions.EXT_point_parameters = GL_TRUE;
		586	ctx->Extensions.EXT_secondary_color = GL_TRUE;
		587	ctx->Extensions.EXT_stencil_wrap = GL_TRUE;
		588	ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;
		589	/ctx->Extensions.SGIS_generate_mipmap = GL_TRUE;/
		590	}
		591
		592
		593	/**
		594	* Enable all OpenGL 1.5 features and extensions.
		595	* A convenience function to be called by drivers.
		596	*/
		597	void
		598	_mesa_enable_1_5_extensions(struct gl_context *ctx)
		599	{
		600	ctx->Extensions.ARB_occlusion_query = GL_TRUE;
		601	/ctx->Extensions.ARB_vertex_buffer_object = GL_TRUE;/
		602	ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
		603	}
		604
		605
		606	/**
		607	* Enable all OpenGL 2.0 features and extensions.
		608	* A convenience function to be called by drivers.
		609	*/
		610	void
		611	_mesa_enable_2_0_extensions(struct gl_context *ctx)
		612	{
		613	/ctx->Extensions.ARB_draw_buffers = GL_TRUE;/
		614	#if FEATURE_ARB_fragment_shader
		615	ctx->Extensions.ARB_fragment_shader = GL_TRUE;
		616	#endif
		617	ctx->Extensions.ARB_point_sprite = GL_TRUE;
		618	ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
		619	ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
		620	#if FEATURE_ARB_shader_objects
		621	ctx->Extensions.ARB_shader_objects = GL_TRUE;
		622	#endif
		623	#if FEATURE_ARB_shading_language_100
		624	ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
		625	#endif
		626	ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
		627	#if FEATURE_ARB_vertex_shader
		628	ctx->Extensions.ARB_vertex_shader = GL_TRUE;
		629	#endif
		630	}
		631
		632
		633	/**
		634	* Enable all OpenGL 2.1 features and extensions.
		635	* A convenience function to be called by drivers.
		636	*/
		637	void
		638	_mesa_enable_2_1_extensions(struct gl_context *ctx)
		639	{
		640	#if FEATURE_EXT_pixel_buffer_object
		641	ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
		642	#endif
		643	#if FEATURE_EXT_texture_sRGB
		644	ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
		645	#endif
		646	}
		647
		648
		649	/**
		650	* Either enable or disable the named extension.
		651	* \return GL_TRUE for success, GL_FALSE if invalid extension name
		652	*/
		653	static GLboolean
		654	set_extension( struct gl_context ctx, const char name, GLboolean state )
		655	{
		656	size_t offset;
		657
		658	if (ctx->Extensions.String) {
		659	/* The string was already queried - can't change it now! */
		660	_mesa_problem(ctx, "Trying to enable/disable extension after glGetString(GL_EXTENSIONS): %s", name);
		661	return GL_FALSE;
		662	}
		663
		664	offset = name_to_offset(name);
		665	if (offset == 0) {
		666	_mesa_problem(ctx, "Trying to enable/disable unknown extension %s",
		667	name);
		668	return GL_FALSE;
		669	} else if (offset == o(dummy_true) && state == GL_FALSE) {
		670	_mesa_problem(ctx, "Trying to disable a permanently enabled extension: "
		671	"%s", name);
		672	return GL_FALSE;
		673	} else {
		674	GLboolean base = (GLboolean ) &ctx->Extensions;
		675	base[offset] = state;
		676	return GL_TRUE;
		677	}
		678	}
		679
		680
		681	/**
		682	* Enable the named extension.
		683	* Typically called by drivers.
		684	*/
		685	void
		686	_mesa_enable_extension( struct gl_context ctx, const char name )
		687	{
		688	if (!set_extension(ctx, name, GL_TRUE))
		689	_mesa_problem(ctx, "Trying to enable unknown extension: %s", name);
		690	}
		691
		692
		693	/**
		694	* Disable the named extension.
		695	* XXX is this really needed???
		696	*/
		697	void
		698	_mesa_disable_extension( struct gl_context ctx, const char name )
		699	{
		700	if (!set_extension(ctx, name, GL_FALSE))
		701	_mesa_problem(ctx, "Trying to disable unknown extension: %s", name);
		702	}
		703
		704
		705	/**
		706	* Test if the named extension is enabled in this context.
		707	*/
		708	GLboolean
		709	_mesa_extension_is_enabled( struct gl_context ctx, const char name )
		710	{
		711	size_t offset;
		712	GLboolean *base;
		713
		714	if (name == 0)
		715	return GL_FALSE;
		716
		717	offset = name_to_offset(name);
		718	if (offset == 0)
		719	return GL_FALSE;
		720	base = (GLboolean *) &ctx->Extensions;
		721	return base[offset];
		722	}
		723
		724
		725	/**
		726	* Append string 'b' onto string 'a'. Free 'a' and return new string.
		727	*/
		728	static char *
		729	append(const char a, const char b)
		730	{
		731	const GLuint aLen = a ? strlen(a) : 0;
		732	const GLuint bLen = b ? strlen(b) : 0;
		733	char *s = calloc(1, aLen + bLen + 1);
		734	if (s) {
		735	if (a)
		736	memcpy(s, a, aLen);
		737	if (b)
		738	memcpy(s + aLen, b, bLen);
		739	s[aLen + bLen] = '\0';
		740	}
		741	if (a)
		742	free((void *) a);
		743	return s;
		744	}
		745
		746
		747	/**
		748	* Check the MESA_EXTENSION_OVERRIDE env var.
		749	* For extension names that are recognized, turn them on. For extension
		750	* names that are recognized and prefixed with '-', turn them off.
		751	* Return a string of the unknown/leftover names.
		752	*
		753	* Returnd string needs to be freed.
		754	*/
		755	static char *
		756	get_extension_override( struct gl_context *ctx )
		757	{
		758	const char *envExt = _mesa_getenv("MESA_EXTENSION_OVERRIDE");
		759	char *extraExt = NULL;
		760	char ext[1000];
		761	GLuint extLen = 0;
		762	GLuint i;
		763	GLboolean disableExt = GL_FALSE;
		764
		765	if (!envExt)
		766	return NULL;
		767
		768	for (i = 0; ; i++) {
		769	if (envExt[i] == '\0' \|\| envExt[i] == ' ') {
		770	/* terminate/process 'ext' if extLen > 0 */
		771	if (extLen > 0) {
		772	assert(extLen < sizeof(ext));
		773	/* enable extension named by 'ext' */
		774	ext[extLen] = 0;
		775	if (!set_extension(ctx, ext, !disableExt)) {
		776	/* unknown extension name, append it to extraExt */
		777	if (extraExt) {
		778	extraExt = append(extraExt, " ");
		779	}
		780	extraExt = append(extraExt, ext);
		781	}
		782	extLen = 0;
		783	disableExt = GL_FALSE;
		784	}
		785	if (envExt[i] == '\0')
		786	break;
		787	}
		788	else if (envExt[i] == '-') {
		789	disableExt = GL_TRUE;
		790	}
		791	else {
		792	/* accumulate this non-space character */
		793	ext[extLen++] = envExt[i];
		794	}
		795	}
		796
		797	return extraExt;
		798	}
		799
		800
		801	/**
		802	* \brief Initialize extension tables and enable default extensions.
		803	*
		804	* This should be called during context initialization.
		805	* Note: Sets gl_extensions.dummy_true to true.
		806	*/
		807	void
		808	_mesa_init_extensions( struct gl_context *ctx )
		809	{
		810	GLboolean base = (GLboolean ) &ctx->Extensions;
		811	GLboolean *sentinel = base + o(extension_sentinel);
		812	GLboolean *i;
		813	const size_t *j;
		814
		815	/* First, turn all extensions off. */
		816	for (i = base; i != sentinel; ++i)
		817	*i = GL_FALSE;
		818
		819	/* Then, selectively turn default extensions on. */
		820	ctx->Extensions.dummy_true = GL_TRUE;
		821	for (j = default_extensions; *j != 0; ++j)
		822	base[*j] = GL_TRUE;
		823	}
		824
		825
		826	/**
		827	* Construct the GL_EXTENSIONS string. Called the first time that
		828	* glGetString(GL_EXTENSIONS) is called.
		829	*/
		830	GLubyte*
		831	_mesa_make_extension_string(struct gl_context *ctx)
		832	{
		833	/* The extension string. */
		834	char *exts = 0;
		835	/* Length of extension string. */
		836	size_t length = 0;
		837	/* String of extra extensions. */
		838	char *extra_extensions = get_extension_override(ctx);
		839	GLboolean base = (GLboolean ) &ctx->Extensions;
		840	const struct extension *i;
		841
		842	/* Compute length of the extension string. */
		843	for (i = extension_table; i->name != 0; ++i) {
		844	if (base[i->offset] && (i->api_set & (1 << ctx->API))) {
		845	length += strlen(i->name) + 1; /* +1 for space */
		846	}
		847	}
		848	if (extra_extensions != NULL)
		849	length += 1 + strlen(extra_extensions); /* +1 for space */
		850
		851	exts = (char *) calloc(length + 1, sizeof(char));
		852	if (exts == NULL) {
		853	free(extra_extensions);
		854	return NULL;
		855	}
		856
		857	/* Build the extension string.*/
		858	for (i = extension_table; i->name != 0; ++i) {
		859	if (base[i->offset] && (i->api_set & (1 << ctx->API))) {
		860	strcat(exts, i->name);
		861	strcat(exts, " ");
		862	}
		863	}
		864	if (extra_extensions != 0) {
		865	strcat(exts, extra_extensions);
		866	free(extra_extensions);
		867	}
		868
		869	return (GLubyte *) exts;
		870	}
		871
		872	/**
		873	* Return number of enabled extensions.
		874	*/
		875	GLuint
		876	_mesa_get_extension_count(struct gl_context *ctx)
		877	{
		878	GLboolean *base;
		879	const struct extension *i;
		880
		881	/* only count once */
		882	if (ctx->Extensions.Count != 0)
		883	return ctx->Extensions.Count;
		884
		885	base = (GLboolean *) &ctx->Extensions;
		886	for (i = extension_table; i->name != 0; ++i) {
		887	if (base[i->offset]) {
		888	ctx->Extensions.Count++;
		889	}
		890	}
		891	return ctx->Extensions.Count;
		892	}
		893
		894	/**
		895	* Return name of i-th enabled extension
		896	*/
		897	const GLubyte *
		898	_mesa_get_enabled_extension(struct gl_context *ctx, GLuint index)
		899	{
		900	const GLboolean *base;
		901	size_t n;
		902	const struct extension *i;
		903
		904	if (index < 0)
		905	return NULL;
		906
		907	base = (GLboolean*) &ctx->Extensions;
		908	n = 0;
		909	for (i = extension_table; i->name != 0; ++i) {
		910	if (n == index && base[i->offset]) {
		911	return (GLubyte*) i->name;
		912	} else if (base[i->offset]) {
		913	++n;
		914	}
		915	}
		916
		917	return NULL;
		918	}

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(root)/programs/develop/libraries/Mesa/src/mesa/main/extensions.c – Rev 4217