| /* |
| * Mesa 3-D graphics library |
| * |
| * Copyright (C) 2010 VMware, Inc. All Rights Reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included |
| * in all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| * OTHER DEALINGS IN THE SOFTWARE. |
| */ |
| |
| |
| #include "imports.h" |
| #include "mtypes.h" |
| #include "version.h" |
| #include "git_sha1.h" |
| |
| /** |
| * Scans 'string' to see if it ends with 'ending'. |
| */ |
| static GLboolean |
| check_for_ending(const char *string, const char *ending) |
| { |
| int len1, len2; |
| |
| len1 = strlen(string); |
| len2 = strlen(ending); |
| |
| if (len2 > len1) { |
| return GL_FALSE; |
| } |
| |
| if (strcmp(string + (len1 - len2), ending) == 0) { |
| return GL_TRUE; |
| } else { |
| return GL_FALSE; |
| } |
| } |
| |
| /** |
| * Returns the gl override data |
| * |
| * version > 0 indicates there is an override requested |
| * fwd_context is only valid if version > 0 |
| */ |
| static void |
| get_gl_override(int *version, GLboolean *fwd_context, |
| GLboolean *compat_context) |
| { |
| const char *env_var = "MESA_GL_VERSION_OVERRIDE"; |
| const char *version_str; |
| int major, minor, n; |
| static int override_version = -1; |
| static GLboolean fc_suffix = GL_FALSE; |
| static GLboolean compat_suffix = GL_FALSE; |
| |
| if (override_version < 0) { |
| override_version = 0; |
| |
| version_str = getenv(env_var); |
| if (version_str) { |
| fc_suffix = check_for_ending(version_str, "FC"); |
| compat_suffix = check_for_ending(version_str, "COMPAT"); |
| |
| n = sscanf(version_str, "%u.%u", &major, &minor); |
| if (n != 2) { |
| fprintf(stderr, "error: invalid value for %s: %s\n", env_var, version_str); |
| override_version = 0; |
| } else { |
| override_version = major * 10 + minor; |
| if (override_version < 30 && fc_suffix) { |
| fprintf(stderr, "error: invalid value for %s: %s\n", env_var, version_str); |
| } |
| } |
| } |
| } |
| |
| *version = override_version; |
| *fwd_context = fc_suffix; |
| *compat_context = compat_suffix; |
| } |
| |
| /** |
| * Builds the MESA version string. |
| */ |
| static void |
| create_version_string(struct gl_context *ctx, const char *prefix) |
| { |
| static const int max = 100; |
| |
| ctx->VersionString = malloc(max); |
| if (ctx->VersionString) { |
| _mesa_snprintf(ctx->VersionString, max, |
| "%s%u.%u%s Mesa " PACKAGE_VERSION |
| #ifdef MESA_GIT_SHA1 |
| " (" MESA_GIT_SHA1 ")" |
| #endif |
| , |
| prefix, |
| ctx->Version / 10, ctx->Version % 10, |
| (ctx->API == API_OPENGL_CORE) ? " (Core Profile)" : "" |
| ); |
| } |
| } |
| |
| /** |
| * Override the context's version and/or API type if the |
| * environment variable MESA_GL_VERSION_OVERRIDE is set. |
| * |
| * Example uses of MESA_GL_VERSION_OVERRIDE: |
| * |
| * 2.1: select a compatibility (non-Core) profile with GL version 2.1 |
| * 3.0: select a compatibility (non-Core) profile with GL version 3.0 |
| * 3.0FC: select a Core+Forward Compatible profile with GL version 3.0 |
| * 3.1: select a Core profile with GL version 3.1 |
| * 3.1FC: select a Core+Forward Compatible profile with GL version 3.1 |
| */ |
| bool |
| _mesa_override_gl_version_contextless(struct gl_constants *consts, |
| gl_api *apiOut, GLuint *versionOut) |
| { |
| int version; |
| GLboolean fwd_context, compat_context; |
| |
| get_gl_override(&version, &fwd_context, &compat_context); |
| |
| if (version > 0) { |
| *versionOut = version; |
| if (version >= 30 && fwd_context) { |
| *apiOut = API_OPENGL_CORE; |
| consts->ContextFlags |= GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT; |
| } else if (version >= 31 && !compat_context) { |
| *apiOut = API_OPENGL_CORE; |
| } else { |
| *apiOut = API_OPENGL_COMPAT; |
| } |
| return GL_TRUE; |
| } |
| return GL_FALSE; |
| } |
| |
| void |
| _mesa_override_gl_version(struct gl_context *ctx) |
| { |
| if (_mesa_override_gl_version_contextless(&ctx->Const, &ctx->API, |
| &ctx->Version)) { |
| create_version_string(ctx, ""); |
| } |
| } |
| |
| /** |
| * Returns the gl override value |
| * |
| * version > 0 indicates there is an override requested |
| */ |
| int |
| _mesa_get_gl_version_override(void) |
| { |
| int version; |
| GLboolean fwd_context, compat_context; |
| |
| get_gl_override(&version, &fwd_context, &compat_context); |
| |
| return version; |
| } |
| |
| /** |
| * Override the context's GLSL version if the environment variable |
| * MESA_GLSL_VERSION_OVERRIDE is set. Valid values for |
| * MESA_GLSL_VERSION_OVERRIDE are integers, such as "130". |
| */ |
| void |
| _mesa_override_glsl_version(struct gl_constants *consts) |
| { |
| const char *env_var = "MESA_GLSL_VERSION_OVERRIDE"; |
| const char *version; |
| int n; |
| |
| version = getenv(env_var); |
| if (!version) { |
| return; |
| } |
| |
| n = sscanf(version, "%u", &consts->GLSLVersion); |
| if (n != 1) { |
| fprintf(stderr, "error: invalid value for %s: %s\n", env_var, version); |
| return; |
| } |
| } |
| |
| /** |
| * Examine enabled GL extensions to determine GL version. |
| */ |
| static GLuint |
| compute_version(const struct gl_extensions *extensions, |
| const struct gl_constants *consts, gl_api api) |
| { |
| GLuint major, minor, version; |
| |
| const GLboolean ver_1_3 = (extensions->ARB_texture_border_clamp && |
| extensions->ARB_texture_cube_map && |
| extensions->ARB_texture_env_combine && |
| extensions->ARB_texture_env_dot3); |
| const GLboolean ver_1_4 = (ver_1_3 && |
| extensions->ARB_depth_texture && |
| extensions->ARB_shadow && |
| extensions->ARB_texture_env_crossbar && |
| extensions->EXT_blend_color && |
| extensions->EXT_blend_func_separate && |
| extensions->EXT_blend_minmax && |
| extensions->EXT_point_parameters); |
| const GLboolean ver_1_5 = (ver_1_4 && |
| extensions->ARB_occlusion_query); |
| const GLboolean ver_2_0 = (ver_1_5 && |
| extensions->ARB_point_sprite && |
| extensions->ARB_vertex_shader && |
| extensions->ARB_fragment_shader && |
| extensions->ARB_texture_non_power_of_two && |
| extensions->EXT_blend_equation_separate && |
| |
| /* Technically, 2.0 requires the functionality |
| * of the EXT version. Enable 2.0 if either |
| * extension is available, and assume that a |
| * driver that only exposes the ATI extension |
| * will fallback to software when necessary. |
| */ |
| (extensions->EXT_stencil_two_side |
| || extensions->ATI_separate_stencil)); |
| const GLboolean ver_2_1 = (ver_2_0 && |
| extensions->EXT_pixel_buffer_object && |
| extensions->EXT_texture_sRGB); |
| const GLboolean ver_3_0 = (ver_2_1 && |
| consts->GLSLVersion >= 130 && |
| (consts->MaxSamples >= 4 || consts->FakeSWMSAA) && |
| (api == API_OPENGL_CORE || |
| extensions->ARB_color_buffer_float) && |
| extensions->ARB_depth_buffer_float && |
| extensions->ARB_half_float_vertex && |
| extensions->ARB_map_buffer_range && |
| extensions->ARB_shader_texture_lod && |
| extensions->ARB_texture_float && |
| extensions->ARB_texture_rg && |
| extensions->ARB_texture_compression_rgtc && |
| extensions->EXT_draw_buffers2 && |
| extensions->ARB_framebuffer_object && |
| extensions->EXT_framebuffer_sRGB && |
| extensions->EXT_packed_float && |
| extensions->EXT_texture_array && |
| extensions->EXT_texture_shared_exponent && |
| extensions->EXT_transform_feedback && |
| extensions->NV_conditional_render); |
| const GLboolean ver_3_1 = (ver_3_0 && |
| consts->GLSLVersion >= 140 && |
| extensions->ARB_draw_instanced && |
| extensions->ARB_texture_buffer_object && |
| extensions->ARB_uniform_buffer_object && |
| extensions->EXT_texture_snorm && |
| extensions->NV_primitive_restart && |
| extensions->NV_texture_rectangle && |
| consts->Program[MESA_SHADER_VERTEX].MaxTextureImageUnits >= 16); |
| const GLboolean ver_3_2 = (ver_3_1 && |
| consts->GLSLVersion >= 150 && |
| extensions->ARB_depth_clamp && |
| extensions->ARB_draw_elements_base_vertex && |
| extensions->ARB_fragment_coord_conventions && |
| extensions->EXT_provoking_vertex && |
| extensions->ARB_seamless_cube_map && |
| extensions->ARB_sync && |
| extensions->ARB_texture_multisample && |
| extensions->EXT_vertex_array_bgra); |
| const GLboolean ver_3_3 = (ver_3_2 && |
| consts->GLSLVersion >= 330 && |
| extensions->ARB_blend_func_extended && |
| extensions->ARB_explicit_attrib_location && |
| extensions->ARB_instanced_arrays && |
| extensions->ARB_occlusion_query2 && |
| extensions->ARB_shader_bit_encoding && |
| extensions->ARB_texture_rgb10_a2ui && |
| extensions->ARB_timer_query && |
| extensions->ARB_vertex_type_2_10_10_10_rev && |
| extensions->EXT_texture_swizzle); |
| /* ARB_sampler_objects is always enabled in mesa */ |
| |
| if (ver_3_3) { |
| major = 3; |
| minor = 3; |
| } |
| else if (ver_3_2) { |
| major = 3; |
| minor = 2; |
| } |
| else if (ver_3_1) { |
| major = 3; |
| minor = 1; |
| } |
| else if (ver_3_0) { |
| major = 3; |
| minor = 0; |
| } |
| else if (ver_2_1) { |
| major = 2; |
| minor = 1; |
| } |
| else if (ver_2_0) { |
| major = 2; |
| minor = 0; |
| } |
| else if (ver_1_5) { |
| major = 1; |
| minor = 5; |
| } |
| else if (ver_1_4) { |
| major = 1; |
| minor = 4; |
| } |
| else if (ver_1_3) { |
| major = 1; |
| minor = 3; |
| } |
| else { |
| major = 1; |
| minor = 2; |
| } |
| |
| version = major * 10 + minor; |
| |
| if (api == API_OPENGL_CORE && version < 31) |
| return 0; |
| |
| return version; |
| } |
| |
| static GLuint |
| compute_version_es1(const struct gl_extensions *extensions) |
| { |
| /* OpenGL ES 1.0 is derived from OpenGL 1.3 */ |
| const GLboolean ver_1_0 = (extensions->ARB_texture_env_combine && |
| extensions->ARB_texture_env_dot3); |
| /* OpenGL ES 1.1 is derived from OpenGL 1.5 */ |
| const GLboolean ver_1_1 = (ver_1_0 && |
| extensions->EXT_point_parameters); |
| |
| if (ver_1_1) { |
| return 11; |
| } else if (ver_1_0) { |
| return 10; |
| } else { |
| return 0; |
| } |
| } |
| |
| static GLuint |
| compute_version_es2(const struct gl_extensions *extensions) |
| { |
| /* OpenGL ES 2.0 is derived from OpenGL 2.0 */ |
| const GLboolean ver_2_0 = (extensions->ARB_texture_cube_map && |
| extensions->EXT_blend_color && |
| extensions->EXT_blend_func_separate && |
| extensions->EXT_blend_minmax && |
| extensions->ARB_vertex_shader && |
| extensions->ARB_fragment_shader && |
| extensions->ARB_texture_non_power_of_two && |
| extensions->EXT_blend_equation_separate); |
| /* FINISHME: This list isn't quite right. */ |
| const GLboolean ver_3_0 = (extensions->ARB_half_float_vertex && |
| extensions->ARB_internalformat_query && |
| extensions->ARB_map_buffer_range && |
| extensions->ARB_shader_texture_lod && |
| extensions->ARB_texture_float && |
| extensions->ARB_texture_rg && |
| extensions->EXT_draw_buffers2 && |
| /* extensions->ARB_framebuffer_object && */ |
| extensions->EXT_framebuffer_sRGB && |
| extensions->EXT_packed_float && |
| extensions->EXT_texture_array && |
| extensions->EXT_texture_shared_exponent && |
| extensions->EXT_transform_feedback && |
| extensions->ARB_draw_instanced && |
| extensions->ARB_uniform_buffer_object && |
| extensions->EXT_texture_snorm && |
| extensions->NV_primitive_restart && |
| extensions->OES_depth_texture_cube_map); |
| if (ver_3_0) { |
| return 30; |
| } else if (ver_2_0) { |
| return 20; |
| } else { |
| return 0; |
| } |
| } |
| |
| GLuint |
| _mesa_get_version(const struct gl_extensions *extensions, |
| struct gl_constants *consts, gl_api api) |
| { |
| switch (api) { |
| case API_OPENGL_COMPAT: |
| /* Disable GLSL 1.40 and later for legacy contexts. |
| * This disallows creation of the GL 3.1 compatibility context. */ |
| if (consts->GLSLVersion > 130) { |
| consts->GLSLVersion = 130; |
| } |
| /* fall through */ |
| case API_OPENGL_CORE: |
| return compute_version(extensions, consts, api); |
| case API_OPENGLES: |
| return compute_version_es1(extensions); |
| case API_OPENGLES2: |
| return compute_version_es2(extensions); |
| } |
| return 0; |
| } |
| |
| /** |
| * Set the context's Version and VersionString fields. |
| * This should only be called once as part of context initialization |
| * or to perform version check for GLX_ARB_create_context_profile. |
| */ |
| void |
| _mesa_compute_version(struct gl_context *ctx) |
| { |
| if (ctx->Version) |
| return; |
| |
| ctx->Version = _mesa_get_version(&ctx->Extensions, &ctx->Const, ctx->API); |
| |
| switch (ctx->API) { |
| case API_OPENGL_COMPAT: |
| case API_OPENGL_CORE: |
| create_version_string(ctx, ""); |
| break; |
| |
| case API_OPENGLES: |
| if (!ctx->Version) { |
| _mesa_problem(ctx, "Incomplete OpenGL ES 1.0 support."); |
| return; |
| } |
| create_version_string(ctx, "OpenGL ES-CM "); |
| break; |
| |
| case API_OPENGLES2: |
| if (!ctx->Version) { |
| _mesa_problem(ctx, "Incomplete OpenGL ES 2.0 support."); |
| return; |
| } |
| create_version_string(ctx, "OpenGL ES "); |
| break; |
| } |
| } |