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Diffstat (limited to 'mesalib/src/mesa/main/version.c')
| -rw-r--r-- | mesalib/src/mesa/main/version.c | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/mesalib/src/mesa/main/version.c b/mesalib/src/mesa/main/version.c new file mode 100644 index 000000000..a39b68065 --- /dev/null +++ b/mesalib/src/mesa/main/version.c @@ -0,0 +1,130 @@ +/* + * 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 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 "context.h" +#include "version.h" + + + +/** + * Examine enabled GL extensions to determine GL version. + * Return major and minor version numbers. + */ +static void +compute_version(const GLcontext *ctx, GLuint *major, GLuint *minor) +{ + const GLboolean ver_1_3 = (ctx->Extensions.ARB_multisample && + ctx->Extensions.ARB_multitexture && + ctx->Extensions.ARB_texture_border_clamp && + ctx->Extensions.ARB_texture_compression && + ctx->Extensions.ARB_texture_cube_map && + ctx->Extensions.EXT_texture_env_add && + ctx->Extensions.ARB_texture_env_combine && + ctx->Extensions.ARB_texture_env_dot3); + const GLboolean ver_1_4 = (ver_1_3 && + ctx->Extensions.ARB_depth_texture && + ctx->Extensions.ARB_shadow && + ctx->Extensions.ARB_texture_env_crossbar && + ctx->Extensions.ARB_texture_mirrored_repeat && + ctx->Extensions.ARB_window_pos && + ctx->Extensions.EXT_blend_color && + ctx->Extensions.EXT_blend_func_separate && + ctx->Extensions.EXT_blend_minmax && + ctx->Extensions.EXT_blend_subtract && + ctx->Extensions.EXT_fog_coord && + ctx->Extensions.EXT_multi_draw_arrays && + ctx->Extensions.EXT_point_parameters && + ctx->Extensions.EXT_secondary_color && + ctx->Extensions.EXT_stencil_wrap && + ctx->Extensions.EXT_texture_lod_bias && + ctx->Extensions.SGIS_generate_mipmap); + const GLboolean ver_1_5 = (ver_1_4 && + ctx->Extensions.ARB_occlusion_query && + ctx->Extensions.ARB_vertex_buffer_object && + ctx->Extensions.EXT_shadow_funcs); + const GLboolean ver_2_0 = (ver_1_5 && + ctx->Extensions.ARB_draw_buffers && + ctx->Extensions.ARB_point_sprite && + ctx->Extensions.ARB_shader_objects && + ctx->Extensions.ARB_vertex_shader && + ctx->Extensions.ARB_fragment_shader && + ctx->Extensions.ARB_texture_non_power_of_two && + ctx->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. + */ + (ctx->Extensions.EXT_stencil_two_side + || ctx->Extensions.ATI_separate_stencil)); + const GLboolean ver_2_1 = (ver_2_0 && + ctx->Extensions.ARB_shading_language_120 && + ctx->Extensions.EXT_pixel_buffer_object && + ctx->Extensions.EXT_texture_sRGB); + 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; + } +} + + +/** + * Set the context's VersionMajor, VersionMinor, VersionString fields. + * This should only be called once as part of context initialization. + */ +void +_mesa_compute_version(GLcontext *ctx) +{ + static const int max = 100; + + compute_version(ctx, &ctx->VersionMajor, &ctx->VersionMinor); + + ctx->VersionString = (char *) malloc(max); + if (ctx->VersionString) { + _mesa_snprintf(ctx->VersionString, max, "%u.%u Mesa " MESA_VERSION_STRING, + ctx->VersionMajor, ctx->VersionMinor); + } +} |