_mesa_GetError _mesa_GetPointerv _mesa_GetString compute_version

static const char* compute_version ( const GLcontext *  ctx ) [static] Examine enabled GL extensions to determine GL version. Returns: version string Definition at line 40 of file getstring.c. Referenced by _mesa_GetString(). { static const char *version_1_2 = "1.2 Mesa " MESA_VERSION_STRING; static const char *version_1_3 = "1.3 Mesa " MESA_VERSION_STRING; static const char *version_1_4 = "1.4 Mesa " MESA_VERSION_STRING; static const char *version_1_5 = "1.5 Mesa " MESA_VERSION_STRING; static const char *version_2_0 = "2.0 Mesa " MESA_VERSION_STRING; static const char *version_2_1 = "2.1 Mesa " MESA_VERSION_STRING; 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) return version_2_1; if (ver_2_0) return version_2_0; if (ver_1_5) return version_1_5; if (ver_1_4) return version_1_4; if (ver_1_3) return version_1_3; return version_1_2; }