2 * Mesa 3-D graphics library
4 * Copyright (C) 2010 VMware, Inc. All Rights Reserved.
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:
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
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 BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
20 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
31 * Override the context's GL version if the environment variable
32 * MESA_GL_VERSION_OVERRIDE is set. Valid values of MESA_GL_VERSION_OVERRIDE
33 * are point-separated version numbers, such as "3.0".
36 override_version(struct gl_context
*ctx
, GLuint
*major
, GLuint
*minor
)
38 const char *env_var
= "MESA_GL_VERSION_OVERRIDE";
42 version
= getenv(env_var
);
47 n
= sscanf(version
, "%u.%u", major
, minor
);
49 fprintf(stderr
, "error: invalid value for %s: %s\n", env_var
, version
);
55 * Examine enabled GL extensions to determine GL version.
56 * Return major and minor version numbers.
59 compute_version(struct gl_context
*ctx
)
62 static const int max
= 100;
64 const GLboolean ver_1_3
= (ctx
->Extensions
.ARB_multitexture
&&
65 ctx
->Extensions
.ARB_texture_border_clamp
&&
66 ctx
->Extensions
.ARB_texture_cube_map
&&
67 ctx
->Extensions
.EXT_texture_env_add
&&
68 ctx
->Extensions
.ARB_texture_env_combine
&&
69 ctx
->Extensions
.ARB_texture_env_dot3
);
70 const GLboolean ver_1_4
= (ver_1_3
&&
71 ctx
->Extensions
.ARB_depth_texture
&&
72 ctx
->Extensions
.ARB_shadow
&&
73 ctx
->Extensions
.ARB_texture_env_crossbar
&&
74 ctx
->Extensions
.ARB_texture_mirrored_repeat
&&
75 ctx
->Extensions
.ARB_window_pos
&&
76 ctx
->Extensions
.EXT_blend_color
&&
77 ctx
->Extensions
.EXT_blend_func_separate
&&
78 ctx
->Extensions
.EXT_blend_minmax
&&
79 ctx
->Extensions
.EXT_blend_subtract
&&
80 ctx
->Extensions
.EXT_fog_coord
&&
81 ctx
->Extensions
.EXT_point_parameters
&&
82 ctx
->Extensions
.EXT_secondary_color
&&
83 ctx
->Extensions
.EXT_stencil_wrap
&&
84 ctx
->Extensions
.EXT_texture_lod_bias
);
85 const GLboolean ver_1_5
= (ver_1_4
&&
86 ctx
->Extensions
.ARB_occlusion_query
&&
87 ctx
->Extensions
.EXT_shadow_funcs
);
88 const GLboolean ver_2_0
= (ver_1_5
&&
89 ctx
->Extensions
.ARB_draw_buffers
&&
90 ctx
->Extensions
.ARB_point_sprite
&&
91 ctx
->Extensions
.ARB_shader_objects
&&
92 ctx
->Extensions
.ARB_vertex_shader
&&
93 ctx
->Extensions
.ARB_fragment_shader
&&
94 ctx
->Extensions
.ARB_texture_non_power_of_two
&&
95 ctx
->Extensions
.EXT_blend_equation_separate
&&
97 /* Technically, 2.0 requires the functionality
98 * of the EXT version. Enable 2.0 if either
99 * extension is available, and assume that a
100 * driver that only exposes the ATI extension
101 * will fallback to software when necessary.
103 (ctx
->Extensions
.EXT_stencil_two_side
104 || ctx
->Extensions
.ATI_separate_stencil
));
105 const GLboolean ver_2_1
= (ver_2_0
&&
106 ctx
->Const
.GLSLVersion
>= 120 &&
107 ctx
->Extensions
.EXT_pixel_buffer_object
&&
108 ctx
->Extensions
.EXT_texture_sRGB
);
109 const GLboolean ver_3_0
= (ver_2_1
&&
110 ctx
->Extensions
.ARB_color_buffer_float
&&
111 ctx
->Extensions
.ARB_depth_buffer_float
&&
112 ctx
->Extensions
.ARB_half_float_pixel
&&
113 ctx
->Extensions
.ARB_map_buffer_range
&&
114 ctx
->Extensions
.ARB_texture_float
&&
115 ctx
->Extensions
.ARB_texture_rg
&&
116 ctx
->Extensions
.ARB_texture_compression_rgtc
&&
117 ctx
->Extensions
.APPLE_vertex_array_object
&&
118 ctx
->Extensions
.EXT_draw_buffers2
&&
119 ctx
->Extensions
.EXT_framebuffer_blit
&&
120 ctx
->Extensions
.EXT_framebuffer_multisample
&&
121 ctx
->Extensions
.EXT_framebuffer_object
&&
122 ctx
->Extensions
.EXT_framebuffer_sRGB
&&
123 ctx
->Extensions
.EXT_packed_depth_stencil
&&
124 ctx
->Extensions
.EXT_packed_float
&&
125 ctx
->Extensions
.EXT_texture_array
&&
126 ctx
->Extensions
.EXT_texture_integer
&&
127 ctx
->Extensions
.EXT_texture_shared_exponent
&&
128 ctx
->Extensions
.EXT_transform_feedback
&&
129 ctx
->Extensions
.NV_conditional_render
);
130 const GLboolean ver_3_1
= (ver_3_0
&&
131 ctx
->Extensions
.ARB_copy_buffer
&&
132 ctx
->Extensions
.ARB_draw_instanced
&&
133 ctx
->Extensions
.ARB_texture_buffer_object
&&
134 ctx
->Extensions
.ARB_uniform_buffer_object
&&
135 ctx
->Extensions
.EXT_texture_snorm
&&
136 ctx
->Extensions
.NV_primitive_restart
&&
137 ctx
->Extensions
.NV_texture_rectangle
&&
138 ctx
->Const
.MaxVertexTextureImageUnits
>= 16);
139 const GLboolean ver_3_2
= (ver_3_1
&&
140 ctx
->Extensions
.ARB_depth_clamp
&&
141 ctx
->Extensions
.ARB_draw_elements_base_vertex
&&
142 ctx
->Extensions
.ARB_fragment_coord_conventions
&&
143 ctx
->Extensions
.ARB_geometry_shader4
&&
144 ctx
->Extensions
.EXT_provoking_vertex
&&
145 ctx
->Extensions
.ARB_seamless_cube_map
&&
146 ctx
->Extensions
.ARB_sync
&&
147 ctx
->Extensions
.ARB_texture_multisample
&&
148 ctx
->Extensions
.EXT_vertex_array_bgra
);
149 const GLboolean ver_3_3
= (ver_3_2
&&
150 ctx
->Extensions
.ARB_blend_func_extended
&&
151 ctx
->Extensions
.ARB_explicit_attrib_location
&&
152 ctx
->Extensions
.ARB_instanced_arrays
&&
153 ctx
->Extensions
.ARB_occlusion_query2
&&
154 ctx
->Extensions
.ARB_sampler_objects
&&
155 ctx
->Extensions
.ARB_texture_rgb10_a2ui
&&
156 ctx
->Extensions
.ARB_timer_query
&&
157 ctx
->Extensions
.ARB_vertex_type_2_10_10_10_rev
&&
158 ctx
->Extensions
.EXT_texture_swizzle
);
201 ctx
->VersionMajor
= major
;
202 ctx
->VersionMinor
= minor
;
204 override_version(ctx
, &ctx
->VersionMajor
, &ctx
->VersionMinor
);
206 ctx
->VersionString
= (char *) malloc(max
);
207 if (ctx
->VersionString
) {
208 _mesa_snprintf(ctx
->VersionString
, max
,
209 "%u.%u Mesa " MESA_VERSION_STRING
211 " (" MESA_GIT_SHA1
")"
214 ctx
->VersionMajor
, ctx
->VersionMinor
);
219 compute_version_es1(struct gl_context
*ctx
)
221 static const int max
= 100;
223 /* OpenGL ES 1.0 is derived from OpenGL 1.3 */
224 const GLboolean ver_1_0
= (ctx
->Extensions
.ARB_multitexture
&&
225 ctx
->Extensions
.EXT_texture_env_add
&&
226 ctx
->Extensions
.ARB_texture_env_combine
&&
227 ctx
->Extensions
.ARB_texture_env_dot3
);
228 /* OpenGL ES 1.1 is derived from OpenGL 1.5 */
229 const GLboolean ver_1_1
= (ver_1_0
&&
230 ctx
->Extensions
.EXT_point_parameters
);
233 ctx
->VersionMajor
= 1;
234 ctx
->VersionMinor
= 1;
235 } else if (ver_1_0
) {
236 ctx
->VersionMajor
= 1;
237 ctx
->VersionMinor
= 0;
239 _mesa_problem(ctx
, "Incomplete OpenGL ES 1.0 support.");
242 ctx
->VersionString
= (char *) malloc(max
);
243 if (ctx
->VersionString
) {
244 _mesa_snprintf(ctx
->VersionString
, max
,
245 "OpenGL ES-CM 1.%d Mesa " MESA_VERSION_STRING
,
251 compute_version_es2(struct gl_context
*ctx
)
253 static const int max
= 100;
255 /* OpenGL ES 2.0 is derived from OpenGL 2.0 */
256 const GLboolean ver_2_0
= (ctx
->Extensions
.ARB_multitexture
&&
257 ctx
->Extensions
.ARB_texture_cube_map
&&
258 ctx
->Extensions
.ARB_texture_mirrored_repeat
&&
259 ctx
->Extensions
.EXT_blend_color
&&
260 ctx
->Extensions
.EXT_blend_func_separate
&&
261 ctx
->Extensions
.EXT_blend_minmax
&&
262 ctx
->Extensions
.EXT_blend_subtract
&&
263 ctx
->Extensions
.EXT_stencil_wrap
&&
264 ctx
->Extensions
.ARB_shader_objects
&&
265 ctx
->Extensions
.ARB_vertex_shader
&&
266 ctx
->Extensions
.ARB_fragment_shader
&&
267 ctx
->Extensions
.ARB_texture_non_power_of_two
&&
268 ctx
->Extensions
.EXT_blend_equation_separate
);
270 ctx
->VersionMajor
= 2;
271 ctx
->VersionMinor
= 0;
273 _mesa_problem(ctx
, "Incomplete OpenGL ES 2.0 support.");
276 ctx
->VersionString
= (char *) malloc(max
);
277 if (ctx
->VersionString
) {
278 _mesa_snprintf(ctx
->VersionString
, max
,
279 "OpenGL ES 2.0 Mesa " MESA_VERSION_STRING
);
284 * Set the context's VersionMajor, VersionMinor, VersionString fields.
285 * This should only be called once as part of context initialization
286 * or to perform version check for GLX_ARB_create_context_profile.
289 _mesa_compute_version(struct gl_context
*ctx
)
291 if (ctx
->VersionMajor
)
296 compute_version(ctx
);
299 compute_version_es1(ctx
);
302 compute_version_es2(ctx
);