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 * Override the context's GLSL version if the environment variable
56 * MESA_GLSL_VERSION_OVERRIDE is set. Valid values for
57 * MESA_GLSL_VERSION_OVERRIDE are integers, such as "130".
60 _mesa_override_glsl_version(struct gl_context *ctx)
62 const char *env_var = "MESA_GLSL_VERSION_OVERRIDE";
66 version = getenv(env_var);
71 n = sscanf(version, "%u", &ctx->Const.GLSLVersion);
73 fprintf(stderr, "error: invalid value for %s: %s\n", env_var, version);
79 * Examine enabled GL extensions to determine GL version.
80 * Return major and minor version numbers.
83 compute_version(struct gl_context *ctx)
86 static const int max = 100;
88 const GLboolean ver_1_3 = (ctx->Extensions.ARB_texture_border_clamp &&
89 ctx->Extensions.ARB_texture_cube_map &&
90 ctx->Extensions.ARB_texture_env_combine &&
91 ctx->Extensions.ARB_texture_env_dot3);
92 const GLboolean ver_1_4 = (ver_1_3 &&
93 ctx->Extensions.ARB_depth_texture &&
94 ctx->Extensions.ARB_shadow &&
95 ctx->Extensions.ARB_texture_env_crossbar &&
96 ctx->Extensions.ARB_window_pos &&
97 ctx->Extensions.EXT_blend_color &&
98 ctx->Extensions.EXT_blend_func_separate &&
99 ctx->Extensions.EXT_blend_minmax &&
100 ctx->Extensions.EXT_fog_coord &&
101 ctx->Extensions.EXT_point_parameters &&
102 ctx->Extensions.EXT_secondary_color);
103 const GLboolean ver_1_5 = (ver_1_4 &&
104 ctx->Extensions.ARB_occlusion_query &&
105 ctx->Extensions.EXT_shadow_funcs);
106 const GLboolean ver_2_0 = (ver_1_5 &&
107 ctx->Extensions.ARB_point_sprite &&
108 ctx->Extensions.ARB_shader_objects &&
109 ctx->Extensions.ARB_vertex_shader &&
110 ctx->Extensions.ARB_fragment_shader &&
111 ctx->Extensions.ARB_texture_non_power_of_two &&
112 ctx->Extensions.EXT_blend_equation_separate &&
114 /* Technically, 2.0 requires the functionality
115 * of the EXT version. Enable 2.0 if either
116 * extension is available, and assume that a
117 * driver that only exposes the ATI extension
118 * will fallback to software when necessary.
120 (ctx->Extensions.EXT_stencil_two_side
121 || ctx->Extensions.ATI_separate_stencil));
122 const GLboolean ver_2_1 = (ver_2_0 &&
123 ctx->Const.GLSLVersion >= 120 &&
124 ctx->Extensions.EXT_pixel_buffer_object &&
125 ctx->Extensions.EXT_texture_sRGB);
126 const GLboolean ver_3_0 = (ver_2_1 &&
127 ctx->Const.GLSLVersion >= 130 &&
128 ctx->Extensions.ARB_color_buffer_float &&
129 ctx->Extensions.ARB_depth_buffer_float &&
130 ctx->Extensions.ARB_half_float_pixel &&
131 ctx->Extensions.ARB_half_float_vertex &&
132 ctx->Extensions.ARB_map_buffer_range &&
133 ctx->Extensions.ARB_shader_texture_lod &&
134 ctx->Extensions.ARB_texture_float &&
135 ctx->Extensions.ARB_texture_rg &&
136 ctx->Extensions.ARB_texture_compression_rgtc &&
137 ctx->Extensions.APPLE_vertex_array_object &&
138 ctx->Extensions.EXT_draw_buffers2 &&
139 ctx->Extensions.ARB_framebuffer_object &&
140 ctx->Extensions.EXT_framebuffer_sRGB &&
141 ctx->Extensions.EXT_packed_float &&
142 ctx->Extensions.EXT_texture_array &&
143 ctx->Extensions.EXT_texture_integer &&
144 ctx->Extensions.EXT_texture_shared_exponent &&
145 ctx->Extensions.EXT_transform_feedback &&
146 ctx->Extensions.NV_conditional_render);
147 const GLboolean ver_3_1 = (ver_3_0 &&
148 ctx->Const.GLSLVersion >= 140 &&
149 ctx->Extensions.ARB_copy_buffer &&
150 ctx->Extensions.ARB_draw_instanced &&
151 ctx->Extensions.ARB_texture_buffer_object &&
152 ctx->Extensions.ARB_uniform_buffer_object &&
153 ctx->Extensions.EXT_texture_snorm &&
154 ctx->Extensions.NV_primitive_restart &&
155 ctx->Extensions.NV_texture_rectangle &&
156 ctx->Const.MaxVertexTextureImageUnits >= 16);
157 const GLboolean ver_3_2 = (ver_3_1 &&
158 ctx->Const.GLSLVersion >= 150 &&
159 ctx->Extensions.ARB_depth_clamp &&
160 ctx->Extensions.ARB_draw_elements_base_vertex &&
161 ctx->Extensions.ARB_fragment_coord_conventions &&
162 ctx->Extensions.ARB_geometry_shader4 &&
163 ctx->Extensions.EXT_provoking_vertex &&
164 ctx->Extensions.ARB_seamless_cube_map &&
165 ctx->Extensions.ARB_sync &&
166 ctx->Extensions.ARB_texture_multisample &&
167 ctx->Extensions.EXT_vertex_array_bgra);
168 const GLboolean ver_3_3 = (ver_3_2 &&
169 ctx->Const.GLSLVersion >= 330 &&
170 ctx->Extensions.ARB_blend_func_extended &&
171 ctx->Extensions.ARB_explicit_attrib_location &&
172 ctx->Extensions.ARB_instanced_arrays &&
173 ctx->Extensions.ARB_occlusion_query2 &&
174 ctx->Extensions.ARB_sampler_objects &&
175 ctx->Extensions.ARB_texture_rgb10_a2ui &&
176 ctx->Extensions.ARB_timer_query &&
177 ctx->Extensions.ARB_vertex_type_2_10_10_10_rev &&
178 ctx->Extensions.EXT_texture_swizzle);
221 ctx->VersionMajor = major;
222 ctx->VersionMinor = minor;
224 override_version(ctx, &ctx->VersionMajor, &ctx->VersionMinor);
226 ctx->VersionString = (char *) malloc(max);
227 if (ctx->VersionString) {
228 _mesa_snprintf(ctx->VersionString, max,
229 "%u.%u Mesa " MESA_VERSION_STRING
231 " (" MESA_GIT_SHA1 ")"
234 ctx->VersionMajor, ctx->VersionMinor);
239 compute_version_es1(struct gl_context *ctx)
241 static const int max = 100;
243 /* OpenGL ES 1.0 is derived from OpenGL 1.3 */
244 const GLboolean ver_1_0 = (ctx->Extensions.ARB_texture_env_combine &&
245 ctx->Extensions.ARB_texture_env_dot3);
246 /* OpenGL ES 1.1 is derived from OpenGL 1.5 */
247 const GLboolean ver_1_1 = (ver_1_0 &&
248 ctx->Extensions.EXT_point_parameters);
251 ctx->VersionMajor = 1;
252 ctx->VersionMinor = 1;
253 } else if (ver_1_0) {
254 ctx->VersionMajor = 1;
255 ctx->VersionMinor = 0;
257 _mesa_problem(ctx, "Incomplete OpenGL ES 1.0 support.");
260 ctx->VersionString = (char *) malloc(max);
261 if (ctx->VersionString) {
262 _mesa_snprintf(ctx->VersionString, max,
263 "OpenGL ES-CM 1.%d Mesa " MESA_VERSION_STRING,
269 compute_version_es2(struct gl_context *ctx)
271 static const int max = 100;
273 /* OpenGL ES 2.0 is derived from OpenGL 2.0 */
274 const GLboolean ver_2_0 = (ctx->Extensions.ARB_texture_cube_map &&
275 ctx->Extensions.EXT_blend_color &&
276 ctx->Extensions.EXT_blend_func_separate &&
277 ctx->Extensions.EXT_blend_minmax &&
278 ctx->Extensions.ARB_shader_objects &&
279 ctx->Extensions.ARB_vertex_shader &&
280 ctx->Extensions.ARB_fragment_shader &&
281 ctx->Extensions.ARB_texture_non_power_of_two &&
282 ctx->Extensions.EXT_blend_equation_separate);
284 ctx->VersionMajor = 2;
285 ctx->VersionMinor = 0;
287 _mesa_problem(ctx, "Incomplete OpenGL ES 2.0 support.");
290 ctx->VersionString = (char *) malloc(max);
291 if (ctx->VersionString) {
292 _mesa_snprintf(ctx->VersionString, max,
293 "OpenGL ES 2.0 Mesa " MESA_VERSION_STRING);
298 * Set the context's VersionMajor, VersionMinor, VersionString fields.
299 * This should only be called once as part of context initialization
300 * or to perform version check for GLX_ARB_create_context_profile.
303 _mesa_compute_version(struct gl_context *ctx)
305 if (ctx->VersionMajor)
310 compute_version(ctx);
313 compute_version_es1(ctx);
316 compute_version_es2(ctx);