+ features.target_api = api;
+ features.glsl_version = ver;
+ switch(api)
+ {
+ case OPENGL:
+ if(ver.major==2)
+ features.glsl_version = Version(1, (ver.minor+1)*10);
+ else if(ver.major==3 && ver.minor<3)
+ features.glsl_version = Version(1, (ver.minor+3)*10);
+ else
+ features.glsl_version = Version(ver.major, ver.minor*10);
+
+ features.arb_enhanced_layouts = (ver>=Version(4, 4));
+ features.arb_explicit_attrib_location = (ver>=Version(3, 3));
+ features.arb_explicit_uniform_location = (ver>=Version(4, 3));
+ features.arb_gpu_shader5 = (ver>=Version(4, 0));
+ features.arb_separate_shader_objects = (ver>=Version(4, 1));
+ features.arb_uniform_buffer_object = (ver>=Version(3, 2));
+ features.ext_gpu_shader4 = (ver>=Version(2, 1));
+ features.ext_texture_array = (ver>=Version(3, 0));
+ features.uniform_binding_range = (ver>=Version(4, 3) ? 84 : ver>=Version(4, 0) ? 60 :
+ ver>=Version(3, 3) ? 36 : 24);
+ features.texture_binding_range = (ver>=Version(4, 3) ? 96 : ver>=Version(4, 0) ? 80 :
+ ver>=Version(3, 2) ? 48 : ver>=Version(1, 4) ? 32 : 16);
+ features.storage_texture_binding_range = 8;
+ break;
+ case OPENGL_ES:
+ if(ver.major==2)
+ features.glsl_version = Version(1, 0);
+ else
+ features.glsl_version = Version(ver.major, ver.minor*10);
+
+ features.arb_enhanced_layouts = (ver>=Version(3, 2));
+ features.arb_explicit_attrib_location = (ver>=Version(3, 0));
+ features.arb_explicit_uniform_location = (ver>=Version(3, 1));
+ features.arb_gpu_shader5 = (ver>=Version(3, 2));
+ features.arb_separate_shader_objects = (ver>=Version(3, 1));
+ features.arb_uniform_buffer_object = (ver>=Version(3, 0));
+ features.ext_gpu_shader4 = (ver>=Version(3, 0));
+ features.ext_texture_array = (ver>=Version(3, 0));
+ features.uniform_binding_range = (ver>=Version(3, 2) ? 72 : ver>=Version(3, 1) ? 36 : 24);
+ features.texture_binding_range = (ver>=Version(3, 2) ? 96 : ver>=Version(3, 1) ? 48 :
+ ver>=Version(3, 0) ? 32 : 8);
+ features.storage_texture_binding_range = 4;
+ break;
+ case VULKAN:
+ features.glsl_version = Version(4, 60);
+ features.uniform_binding_range = 72;
+ features.texture_binding_range = 96;
+ features.storage_texture_binding_range = 24;
+ break;
+ default:
+ throw invalid_argument("Features::from_api_version");
+ }