WebSVN – Kolibri OS – Blame – /contrib/sdk/sources/Mesa/mesa-10.6.0/src/mesa/main/version.c

Rev	Author	Line No.	Line
5564	serge	1	/*
		2	* Mesa 3-D graphics library
		3	*
		4	* Copyright (C) 2010 VMware, Inc. All Rights Reserved.
		5	*
		6	* Permission is hereby granted, free of charge, to any person obtaining a
		7	* copy of this software and associated documentation files (the "Software"),
		8	* to deal in the Software without restriction, including without limitation
		9	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
		10	* and/or sell copies of the Software, and to permit persons to whom the
		11	* Software is furnished to do so, subject to the following conditions:
		12	*
		13	* The above copyright notice and this permission notice shall be included
		14	* in all copies or substantial portions of the Software.
		15	*
		16	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
		17	* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
		18	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
		19	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
		20	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
		21	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
		22	* OTHER DEALINGS IN THE SOFTWARE.
		23	*/
		24
		25
		26	#include
		27	#include "imports.h"
		28	#include "mtypes.h"
		29	#include "version.h"
		30	#include "git_sha1.h"
		31
		32	/**
		33	* Scans 'string' to see if it ends with 'ending'.
		34	*/
		35	static bool
		36	check_for_ending(const char string, const char ending)
		37	{
		38	const size_t len1 = strlen(string);
		39	const size_t len2 = strlen(ending);
		40
		41	if (len2 > len1)
		42	return false;
		43
		44	return strcmp(string + (len1 - len2), ending) == 0;
		45	}
		46
		47	/**
		48	* Returns the gl override data
		49	*
		50	* version > 0 indicates there is an override requested
		51	* fwd_context is only valid if version > 0
		52	*/
		53	static void
		54	get_gl_override(int version, bool fwd_context, bool *compat_context)
		55	{
		56	const char *env_var = "MESA_GL_VERSION_OVERRIDE";
		57	const char *version_str;
		58	int major, minor, n;
		59	static int override_version = -1;
		60	static bool fc_suffix = false;
		61	static bool compat_suffix = false;
		62
		63	if (override_version < 0) {
		64	override_version = 0;
		65
		66	version_str = getenv(env_var);
		67	if (version_str) {
		68	fc_suffix = check_for_ending(version_str, "FC");
		69	compat_suffix = check_for_ending(version_str, "COMPAT");
		70
		71	n = sscanf(version_str, "%u.%u", &major, &minor);
		72	if (n != 2) {
		73	fprintf(stderr, "error: invalid value for %s: %s\n",
		74	env_var, version_str);
		75	override_version = 0;
		76	} else {
		77	override_version = major * 10 + minor;
		78	if (override_version < 30 && fc_suffix) {
		79	fprintf(stderr, "error: invalid value for %s: %s\n",
		80	env_var, version_str);
		81	}
		82	}
		83	}
		84	}
		85
		86	*version = override_version;
		87	*fwd_context = fc_suffix;
		88	*compat_context = compat_suffix;
		89	}
		90
		91	/**
		92	* Builds the MESA version string.
		93	*/
		94	static void
		95	create_version_string(struct gl_context ctx, const char prefix)
		96	{
		97	static const int max = 100;
		98
		99	ctx->VersionString = malloc(max);
		100	if (ctx->VersionString) {
		101	_mesa_snprintf(ctx->VersionString, max,
		102	"%s%u.%u%s Mesa " PACKAGE_VERSION
		103	#ifdef MESA_GIT_SHA1
		104	" (" MESA_GIT_SHA1 ")"
		105	#endif
		106	,
		107	prefix,
		108	ctx->Version / 10, ctx->Version % 10,
		109	(ctx->API == API_OPENGL_CORE) ? " (Core Profile)" : ""
		110	);
		111	}
		112	}
		113
		114	/**
		115	* Override the context's version and/or API type if the
		116	* environment variable MESA_GL_VERSION_OVERRIDE is set.
		117	*
		118	* Example uses of MESA_GL_VERSION_OVERRIDE:
		119	*
		120	* 2.1: select a compatibility (non-Core) profile with GL version 2.1
		121	* 3.0: select a compatibility (non-Core) profile with GL version 3.0
		122	* 3.0FC: select a Core+Forward Compatible profile with GL version 3.0
		123	* 3.1: select a Core profile with GL version 3.1
		124	* 3.1FC: select a Core+Forward Compatible profile with GL version 3.1
		125	*/
		126	bool
		127	_mesa_override_gl_version_contextless(struct gl_constants *consts,
		128	gl_api apiOut, GLuint versionOut)
		129	{
		130	int version;
		131	bool fwd_context, compat_context;
		132
		133	get_gl_override(&version, &fwd_context, &compat_context);
		134
		135	if (version > 0) {
		136	*versionOut = version;
		137	if (version >= 30 && fwd_context) {
		138	*apiOut = API_OPENGL_CORE;
		139	consts->ContextFlags \|= GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT;
		140	} else if (version >= 31 && !compat_context) {
		141	*apiOut = API_OPENGL_CORE;
		142	} else {
		143	*apiOut = API_OPENGL_COMPAT;
		144	}
		145	return true;
		146	}
		147	return false;
		148	}
		149
		150	void
		151	_mesa_override_gl_version(struct gl_context *ctx)
		152	{
		153	if (_mesa_override_gl_version_contextless(&ctx->Const, &ctx->API,
		154	&ctx->Version)) {
		155	create_version_string(ctx, "");
		156	}
		157	}
		158
		159	/**
		160	* Returns the gl override value
		161	*
		162	* version > 0 indicates there is an override requested
		163	*/
		164	int
		165	_mesa_get_gl_version_override(void)
		166	{
		167	int version;
		168	bool fwd_context, compat_context;
		169
		170	get_gl_override(&version, &fwd_context, &compat_context);
		171
		172	return version;
		173	}
		174
		175	/**
		176	* Override the context's GLSL version if the environment variable
		177	* MESA_GLSL_VERSION_OVERRIDE is set. Valid values for
		178	* MESA_GLSL_VERSION_OVERRIDE are integers, such as "130".
		179	*/
		180	void
		181	_mesa_override_glsl_version(struct gl_constants *consts)
		182	{
		183	const char *env_var = "MESA_GLSL_VERSION_OVERRIDE";
		184	const char *version;
		185	int n;
		186
		187	version = getenv(env_var);
		188	if (!version) {
		189	return;
		190	}
		191
		192	n = sscanf(version, "%u", &consts->GLSLVersion);
		193	if (n != 1) {
		194	fprintf(stderr, "error: invalid value for %s: %s\n", env_var, version);
		195	return;
		196	}
		197	}
		198
		199	/**
		200	* Examine enabled GL extensions to determine GL version.
		201	*/
		202	static GLuint
		203	compute_version(const struct gl_extensions *extensions,
		204	const struct gl_constants *consts, gl_api api)
		205	{
		206	GLuint major, minor, version;
		207
		208	const bool ver_1_3 = (extensions->ARB_texture_border_clamp &&
		209	extensions->ARB_texture_cube_map &&
		210	extensions->ARB_texture_env_combine &&
		211	extensions->ARB_texture_env_dot3);
		212	const bool ver_1_4 = (ver_1_3 &&
		213	extensions->ARB_depth_texture &&
		214	extensions->ARB_shadow &&
		215	extensions->ARB_texture_env_crossbar &&
		216	extensions->EXT_blend_color &&
		217	extensions->EXT_blend_func_separate &&
		218	extensions->EXT_blend_minmax &&
		219	extensions->EXT_point_parameters);
		220	const bool ver_1_5 = (ver_1_4 &&
		221	extensions->ARB_occlusion_query);
		222	const bool ver_2_0 = (ver_1_5 &&
		223	extensions->ARB_point_sprite &&
		224	extensions->ARB_vertex_shader &&
		225	extensions->ARB_fragment_shader &&
		226	extensions->ARB_texture_non_power_of_two &&
		227	extensions->EXT_blend_equation_separate &&
		228
		229	/* Technically, 2.0 requires the functionality of the
		230	* EXT version. Enable 2.0 if either extension is
		231	* available, and assume that a driver that only
		232	* exposes the ATI extension will fallback to
		233	* software when necessary.
		234	*/
		235	(extensions->EXT_stencil_two_side
		236	\|\| extensions->ATI_separate_stencil));
		237	const bool ver_2_1 = (ver_2_0 &&
		238	extensions->EXT_pixel_buffer_object &&
		239	extensions->EXT_texture_sRGB);
		240	const bool ver_3_0 = (ver_2_1 &&
		241	consts->GLSLVersion >= 130 &&
		242	(consts->MaxSamples >= 4 \|\| consts->FakeSWMSAA) &&
		243	(api == API_OPENGL_CORE \|\|
		244	extensions->ARB_color_buffer_float) &&
		245	extensions->ARB_depth_buffer_float &&
		246	extensions->ARB_half_float_vertex &&
		247	extensions->ARB_map_buffer_range &&
		248	extensions->ARB_shader_texture_lod &&
		249	extensions->ARB_texture_float &&
		250	extensions->ARB_texture_rg &&
		251	extensions->ARB_texture_compression_rgtc &&
		252	extensions->EXT_draw_buffers2 &&
		253	extensions->ARB_framebuffer_object &&
		254	extensions->EXT_framebuffer_sRGB &&
		255	extensions->EXT_packed_float &&
		256	extensions->EXT_texture_array &&
		257	extensions->EXT_texture_shared_exponent &&
		258	extensions->EXT_transform_feedback &&
		259	extensions->NV_conditional_render);
		260	const bool ver_3_1 = (ver_3_0 &&
		261	consts->GLSLVersion >= 140 &&
		262	extensions->ARB_draw_instanced &&
		263	extensions->ARB_texture_buffer_object &&
		264	extensions->ARB_uniform_buffer_object &&
		265	extensions->EXT_texture_snorm &&
		266	extensions->NV_primitive_restart &&
		267	extensions->NV_texture_rectangle &&
		268	consts->Program[MESA_SHADER_VERTEX].MaxTextureImageUnits >= 16);
		269	const bool ver_3_2 = (ver_3_1 &&
		270	consts->GLSLVersion >= 150 &&
		271	extensions->ARB_depth_clamp &&
		272	extensions->ARB_draw_elements_base_vertex &&
		273	extensions->ARB_fragment_coord_conventions &&
		274	extensions->EXT_provoking_vertex &&
		275	extensions->ARB_seamless_cube_map &&
		276	extensions->ARB_sync &&
		277	extensions->ARB_texture_multisample &&
		278	extensions->EXT_vertex_array_bgra);
		279	const bool ver_3_3 = (ver_3_2 &&
		280	consts->GLSLVersion >= 330 &&
		281	extensions->ARB_blend_func_extended &&
		282	extensions->ARB_explicit_attrib_location &&
		283	extensions->ARB_instanced_arrays &&
		284	extensions->ARB_occlusion_query2 &&
		285	extensions->ARB_shader_bit_encoding &&
		286	extensions->ARB_texture_rgb10_a2ui &&
		287	extensions->ARB_timer_query &&
		288	extensions->ARB_vertex_type_2_10_10_10_rev &&
		289	extensions->EXT_texture_swizzle);
		290	/* ARB_sampler_objects is always enabled in mesa */
		291
		292	const bool ver_4_0 = (ver_3_3 &&
		293	consts->GLSLVersion >= 400 &&
		294	extensions->ARB_draw_buffers_blend &&
		295	extensions->ARB_draw_indirect &&
		296	extensions->ARB_gpu_shader5 &&
		297	extensions->ARB_gpu_shader_fp64 &&
		298	extensions->ARB_sample_shading &&
		299	false /extensions->ARB_shader_subroutine/ &&
		300	extensions->ARB_tessellation_shader &&
		301	extensions->ARB_texture_buffer_object_rgb32 &&
		302	extensions->ARB_texture_cube_map_array &&
		303	extensions->ARB_texture_query_lod &&
		304	extensions->ARB_transform_feedback2 &&
		305	extensions->ARB_transform_feedback3);
		306	const bool ver_4_1 = (ver_4_0 &&
		307	consts->GLSLVersion >= 410 &&
		308	extensions->ARB_ES2_compatibility &&
		309	extensions->ARB_shader_precision &&
		310	extensions->ARB_vertex_attrib_64bit &&
		311	extensions->ARB_viewport_array);
		312	const bool ver_4_2 = (ver_4_1 &&
		313	consts->GLSLVersion >= 420 &&
		314	extensions->ARB_base_instance &&
		315	extensions->ARB_conservative_depth &&
		316	extensions->ARB_internalformat_query &&
		317	extensions->ARB_shader_atomic_counters &&
		318	extensions->ARB_shader_image_load_store &&
		319	extensions->ARB_shading_language_420pack &&
		320	extensions->ARB_shading_language_packing &&
		321	extensions->ARB_texture_compression_bptc &&
		322	extensions->ARB_transform_feedback_instanced);
		323
		324	if (ver_4_2) {
		325	major = 4;
		326	minor = 2;
		327	}
		328	else if (ver_4_1) {
		329	major = 4;
		330	minor = 1;
		331	}
		332	else if (ver_4_0) {
		333	major = 4;
		334	minor = 0;
		335	}
		336	else if (ver_3_3) {
		337	major = 3;
		338	minor = 3;
		339	}
		340	else if (ver_3_2) {
		341	major = 3;
		342	minor = 2;
		343	}
		344	else if (ver_3_1) {
		345	major = 3;
		346	minor = 1;
		347	}
		348	else if (ver_3_0) {
		349	major = 3;
		350	minor = 0;
		351	}
		352	else if (ver_2_1) {
		353	major = 2;
		354	minor = 1;
		355	}
		356	else if (ver_2_0) {
		357	major = 2;
		358	minor = 0;
		359	}
		360	else if (ver_1_5) {
		361	major = 1;
		362	minor = 5;
		363	}
		364	else if (ver_1_4) {
		365	major = 1;
		366	minor = 4;
		367	}
		368	else if (ver_1_3) {
		369	major = 1;
		370	minor = 3;
		371	}
		372	else {
		373	major = 1;
		374	minor = 2;
		375	}
		376
		377	version = major * 10 + minor;
		378
		379	if (api == API_OPENGL_CORE && version < 31)
		380	return 0;
		381
		382	return version;
		383	}
		384
		385	static GLuint
		386	compute_version_es1(const struct gl_extensions *extensions)
		387	{
		388	/* OpenGL ES 1.0 is derived from OpenGL 1.3 */
		389	const bool ver_1_0 = (extensions->ARB_texture_env_combine &&
		390	extensions->ARB_texture_env_dot3);
		391	/* OpenGL ES 1.1 is derived from OpenGL 1.5 */
		392	const bool ver_1_1 = (ver_1_0 &&
		393	extensions->EXT_point_parameters);
		394
		395	if (ver_1_1) {
		396	return 11;
		397	} else if (ver_1_0) {
		398	return 10;
		399	} else {
		400	return 0;
		401	}
		402	}
		403
		404	static GLuint
		405	compute_version_es2(const struct gl_extensions *extensions)
		406	{
		407	/* OpenGL ES 2.0 is derived from OpenGL 2.0 */
		408	const bool ver_2_0 = (extensions->ARB_texture_cube_map &&
		409	extensions->EXT_blend_color &&
		410	extensions->EXT_blend_func_separate &&
		411	extensions->EXT_blend_minmax &&
		412	extensions->ARB_vertex_shader &&
		413	extensions->ARB_fragment_shader &&
		414	extensions->ARB_texture_non_power_of_two &&
		415	extensions->EXT_blend_equation_separate);
		416	/* FINISHME: This list isn't quite right. */
		417	const bool ver_3_0 = (extensions->ARB_half_float_vertex &&
		418	extensions->ARB_internalformat_query &&
		419	extensions->ARB_map_buffer_range &&
		420	extensions->ARB_shader_texture_lod &&
		421	extensions->ARB_texture_float &&
		422	extensions->ARB_texture_rg &&
		423	extensions->ARB_depth_buffer_float &&
		424	extensions->EXT_draw_buffers2 &&
		425	/* extensions->ARB_framebuffer_object && */
		426	extensions->EXT_framebuffer_sRGB &&
		427	extensions->EXT_packed_float &&
		428	extensions->EXT_texture_array &&
		429	extensions->EXT_texture_shared_exponent &&
		430	extensions->EXT_transform_feedback &&
		431	extensions->ARB_draw_instanced &&
		432	extensions->ARB_uniform_buffer_object &&
		433	extensions->EXT_texture_snorm &&
		434	extensions->NV_primitive_restart &&
		435	extensions->OES_depth_texture_cube_map);
		436	if (ver_3_0) {
		437	return 30;
		438	} else if (ver_2_0) {
		439	return 20;
		440	} else {
		441	return 0;
		442	}
		443	}
		444
		445	GLuint
		446	_mesa_get_version(const struct gl_extensions *extensions,
		447	struct gl_constants *consts, gl_api api)
		448	{
		449	switch (api) {
		450	case API_OPENGL_COMPAT:
		451	/* Disable GLSL 1.40 and later for legacy contexts.
		452	* This disallows creation of the GL 3.1 compatibility context. */
		453	if (consts->GLSLVersion > 130) {
		454	consts->GLSLVersion = 130;
		455	}
		456	/* fall through */
		457	case API_OPENGL_CORE:
		458	return compute_version(extensions, consts, api);
		459	case API_OPENGLES:
		460	return compute_version_es1(extensions);
		461	case API_OPENGLES2:
		462	return compute_version_es2(extensions);
		463	}
		464	return 0;
		465	}
		466
		467	/**
		468	* Set the context's Version and VersionString fields.
		469	* This should only be called once as part of context initialization
		470	* or to perform version check for GLX_ARB_create_context_profile.
		471	*/
		472	void
		473	_mesa_compute_version(struct gl_context *ctx)
		474	{
		475	if (ctx->Version)
		476	return;
		477
		478	ctx->Version = _mesa_get_version(&ctx->Extensions, &ctx->Const, ctx->API);
		479
		480	/* Make sure that the GLSL version lines up with the GL version. In some
		481	* cases it can be too high, e.g. if an extension is missing.
		482	*/
		483	if (ctx->API == API_OPENGL_CORE) {
		484	switch (ctx->Version) {
		485	case 31:
		486	ctx->Const.GLSLVersion = 140;
		487	break;
		488	case 32:
		489	ctx->Const.GLSLVersion = 150;
		490	break;
		491	default:
		492	ctx->Const.GLSLVersion = ctx->Version * 10;
		493	break;
		494	}
		495	}
		496
		497	switch (ctx->API) {
		498	case API_OPENGL_COMPAT:
		499	case API_OPENGL_CORE:
		500	create_version_string(ctx, "");
		501	break;
		502
		503	case API_OPENGLES:
		504	if (!ctx->Version) {
		505	_mesa_problem(ctx, "Incomplete OpenGL ES 1.0 support.");
		506	return;
		507	}
		508	create_version_string(ctx, "OpenGL ES-CM ");
		509	break;
		510
		511	case API_OPENGLES2:
		512	if (!ctx->Version) {
		513	_mesa_problem(ctx, "Incomplete OpenGL ES 2.0 support.");
		514	return;
		515	}
		516	create_version_string(ctx, "OpenGL ES ");
		517	break;
		518	}
		519	}

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(root)/contrib/sdk/sources/Mesa/mesa-10.6.0/src/mesa/main/version.c – Rev 5564