1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 2010 VMware, Inc. All Rights Reserved.
5 *
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:
12 *
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
15 *
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 OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25
26 #include <stdio.h>
27 #include "context.h"
28 #include "draw_validate.h"
29
30 #include "util/os_misc.h"
31 #include "util/simple_mtx.h"
32
33 #include "mtypes.h"
34 #include "version.h"
35 #include "git_sha1.h"
36
37 static simple_mtx_t override_lock = _SIMPLE_MTX_INITIALIZER_NP;
38
39 /**
40 * Scans 'string' to see if it ends with 'ending'.
41 */
42 static bool
check_for_ending(const char * string,const char * ending)43 check_for_ending(const char *string, const char *ending)
44 {
45 const size_t len1 = strlen(string);
46 const size_t len2 = strlen(ending);
47
48 if (len2 > len1)
49 return false;
50
51 return strcmp(string + (len1 - len2), ending) == 0;
52 }
53
54 /**
55 * Returns the gl override data
56 *
57 * version > 0 indicates there is an override requested
58 * fwd_context is only valid if version > 0
59 */
60 static void
get_gl_override(gl_api api,int * version,bool * fwd_context,bool * compat_context)61 get_gl_override(gl_api api, int *version, bool *fwd_context,
62 bool *compat_context)
63 {
64 const char *env_var = (api == API_OPENGL_CORE || api == API_OPENGL_COMPAT)
65 ? "MESA_GL_VERSION_OVERRIDE" : "MESA_GLES_VERSION_OVERRIDE";
66 const char *version_str;
67 int major, minor, n;
68 static struct override_info {
69 int version;
70 bool fc_suffix;
71 bool compat_suffix;
72 } override[] = {
73 [API_OPENGL_COMPAT] = { -1, false, false},
74 [API_OPENGLES] = { -1, false, false},
75 [API_OPENGLES2] = { -1, false, false},
76 [API_OPENGL_CORE] = { -1, false, false},
77 };
78
79 STATIC_ASSERT(ARRAY_SIZE(override) == API_OPENGL_LAST + 1);
80
81 simple_mtx_lock(&override_lock);
82
83 if (api == API_OPENGLES)
84 goto exit;
85
86 if (override[api].version < 0) {
87 override[api].version = 0;
88
89 version_str = os_get_option(env_var);
90 if (version_str) {
91 override[api].fc_suffix = check_for_ending(version_str, "FC");
92 override[api].compat_suffix = check_for_ending(version_str, "COMPAT");
93
94 n = sscanf(version_str, "%u.%u", &major, &minor);
95 if (n != 2) {
96 fprintf(stderr, "error: invalid value for %s: %s\n",
97 env_var, version_str);
98 override[api].version = 0;
99 } else {
100 override[api].version = major * 10 + minor;
101
102 /* There is no such thing as compatibility or forward-compatible for
103 * OpenGL ES 2.0 or 3.x APIs.
104 */
105 if ((override[api].version < 30 && override[api].fc_suffix) ||
106 (api == API_OPENGLES2 && (override[api].fc_suffix ||
107 override[api].compat_suffix))) {
108 fprintf(stderr, "error: invalid value for %s: %s\n",
109 env_var, version_str);
110 }
111 }
112 }
113 }
114
115 exit:
116 *version = override[api].version;
117 *fwd_context = override[api].fc_suffix;
118 *compat_context = override[api].compat_suffix;
119
120 simple_mtx_unlock(&override_lock);
121 }
122
123 /**
124 * Builds the Mesa version string.
125 */
126 static void
create_version_string(struct gl_context * ctx,const char * prefix)127 create_version_string(struct gl_context *ctx, const char *prefix)
128 {
129 static const int max = 100;
130
131 ctx->VersionString = malloc(max);
132 if (ctx->VersionString) {
133 snprintf(ctx->VersionString, max,
134 "%s%u.%u%s Mesa " PACKAGE_VERSION MESA_GIT_SHA1,
135 prefix,
136 ctx->Version / 10, ctx->Version % 10,
137 (ctx->API == API_OPENGL_CORE) ? " (Core Profile)" :
138 (ctx->API == API_OPENGL_COMPAT && ctx->Version >= 32) ?
139 " (Compatibility Profile)" : ""
140 );
141 }
142 }
143
144 /**
145 * Override the context's version and/or API type if the environment variables
146 * MESA_GL_VERSION_OVERRIDE or MESA_GLES_VERSION_OVERRIDE are set.
147 *
148 * Example uses of MESA_GL_VERSION_OVERRIDE:
149 *
150 * 2.1: select a compatibility (non-Core) profile with GL version 2.1.
151 * 3.0: select a compatibility (non-Core) profile with GL version 3.0.
152 * 3.0FC: select a Core+Forward Compatible profile with GL version 3.0.
153 * 3.1: select GL version 3.1 with GL_ARB_compatibility enabled per the driver default.
154 * 3.1FC: select GL version 3.1 with forward compatibility and GL_ARB_compatibility disabled.
155 * 3.1COMPAT: select GL version 3.1 with GL_ARB_compatibility enabled.
156 * X.Y: override GL version to X.Y without changing the profile.
157 * X.YFC: select a Core+Forward Compatible profile with GL version X.Y.
158 * X.YCOMPAT: select a Compatibility profile with GL version X.Y.
159 *
160 * Example uses of MESA_GLES_VERSION_OVERRIDE:
161 *
162 * 2.0: select GLES version 2.0.
163 * 3.0: select GLES version 3.0.
164 * 3.1: select GLES version 3.1.
165 */
166 bool
_mesa_override_gl_version_contextless(struct gl_constants * consts,gl_api * apiOut,GLuint * versionOut)167 _mesa_override_gl_version_contextless(struct gl_constants *consts,
168 gl_api *apiOut, GLuint *versionOut)
169 {
170 int version;
171 bool fwd_context, compat_context;
172
173 get_gl_override(*apiOut, &version, &fwd_context, &compat_context);
174
175 if (version > 0) {
176 *versionOut = version;
177
178 /* Modify the API and context flags as needed. */
179 if (*apiOut == API_OPENGL_CORE || *apiOut == API_OPENGL_COMPAT) {
180 if (version >= 30 && fwd_context) {
181 *apiOut = API_OPENGL_CORE;
182 consts->ContextFlags |= GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT;
183 } else if (compat_context) {
184 *apiOut = API_OPENGL_COMPAT;
185 }
186 }
187
188 return true;
189 }
190 return false;
191 }
192
193 void
_mesa_override_gl_version(struct gl_context * ctx)194 _mesa_override_gl_version(struct gl_context *ctx)
195 {
196 if (_mesa_override_gl_version_contextless(&ctx->Const, &ctx->API,
197 &ctx->Version)) {
198 /* We need to include API in version string for OpenGL ES, otherwise
199 * application can not detect GLES via glGetString(GL_VERSION) query.
200 *
201 * From OpenGL ES 3.2 spec, Page 436:
202 *
203 * "The VERSION string is laid out as follows:
204 *
205 * OpenGL ES N.M vendor-specific information"
206 *
207 * From OpenGL 4.5 spec, Page 538:
208 *
209 * "The VERSION and SHADING_LANGUAGE_VERSION strings are laid out as
210 * follows:
211 *
212 * <version number><space><vendor-specific information>"
213 */
214 create_version_string(ctx, _mesa_is_gles(ctx) ? "OpenGL ES " : "");
215 ctx->Extensions.Version = ctx->Version;
216 }
217 }
218
219 /**
220 * Override the context's GLSL version if the environment variable
221 * MESA_GLSL_VERSION_OVERRIDE is set. Valid values for
222 * MESA_GLSL_VERSION_OVERRIDE are integers, such as "130".
223 */
224 void
_mesa_override_glsl_version(struct gl_constants * consts)225 _mesa_override_glsl_version(struct gl_constants *consts)
226 {
227 const char *env_var = "MESA_GLSL_VERSION_OVERRIDE";
228 const char *version;
229 int n;
230
231 version = getenv(env_var);
232 if (!version) {
233 return;
234 }
235
236 n = sscanf(version, "%u", &consts->GLSLVersion);
237 if (n != 1) {
238 fprintf(stderr, "error: invalid value for %s: %s\n", env_var, version);
239 return;
240 }
241 }
242
243 /**
244 * Examine enabled GL extensions to determine GL version.
245 */
246 static GLuint
compute_version(const struct gl_extensions * extensions,const struct gl_constants * consts,gl_api api)247 compute_version(const struct gl_extensions *extensions,
248 const struct gl_constants *consts, gl_api api)
249 {
250 GLuint major, minor, version;
251
252 const bool ver_1_3 = (extensions->ARB_texture_border_clamp &&
253 extensions->ARB_texture_cube_map &&
254 extensions->ARB_texture_env_combine &&
255 extensions->ARB_texture_env_dot3);
256 const bool ver_1_4 = (ver_1_3 &&
257 extensions->ARB_depth_texture &&
258 extensions->ARB_shadow &&
259 extensions->ARB_texture_env_crossbar &&
260 extensions->EXT_blend_color &&
261 extensions->EXT_blend_func_separate &&
262 extensions->EXT_blend_minmax &&
263 extensions->EXT_point_parameters);
264 const bool ver_1_5 = (ver_1_4 &&
265 extensions->ARB_occlusion_query);
266 const bool ver_2_0 = (ver_1_5 &&
267 extensions->ARB_point_sprite &&
268 extensions->ARB_vertex_shader &&
269 extensions->ARB_fragment_shader &&
270 extensions->ARB_texture_non_power_of_two &&
271 extensions->EXT_blend_equation_separate &&
272 extensions->EXT_stencil_two_side);
273 const bool ver_2_1 = (ver_2_0 &&
274 extensions->EXT_pixel_buffer_object &&
275 extensions->EXT_texture_sRGB);
276 /* We lie about the minimum number of color attachments. Strictly, OpenGL
277 * 3.0 requires 8, whereas OpenGL ES requires 4. OpenGL ES 3.0 class
278 * hardware may only support 4 render targets. Advertise non-conformant
279 * OpenGL 3.0 anyway. Affects freedreno on a3xx
280 */
281 const bool ver_3_0 = (ver_2_1 &&
282 consts->GLSLVersion >= 130 &&
283 consts->MaxColorAttachments >= 4 &&
284 (consts->MaxSamples >= 4 || consts->FakeSWMSAA) &&
285 (api == API_OPENGL_CORE ||
286 extensions->ARB_color_buffer_float) &&
287 extensions->ARB_depth_buffer_float &&
288 extensions->ARB_half_float_vertex &&
289 extensions->ARB_map_buffer_range &&
290 extensions->ARB_shader_texture_lod &&
291 extensions->ARB_texture_float &&
292 extensions->ARB_texture_rg &&
293 extensions->ARB_texture_compression_rgtc &&
294 extensions->EXT_draw_buffers2 &&
295 extensions->ARB_framebuffer_object &&
296 extensions->EXT_framebuffer_sRGB &&
297 extensions->EXT_packed_float &&
298 extensions->EXT_texture_array &&
299 extensions->EXT_texture_shared_exponent &&
300 extensions->EXT_transform_feedback &&
301 extensions->NV_conditional_render);
302 const bool ver_3_1 = (ver_3_0 &&
303 consts->GLSLVersion >= 140 &&
304 extensions->ARB_draw_instanced &&
305 extensions->ARB_texture_buffer_object &&
306 extensions->ARB_uniform_buffer_object &&
307 extensions->EXT_texture_snorm &&
308 extensions->NV_primitive_restart &&
309 extensions->NV_texture_rectangle &&
310 consts->Program[MESA_SHADER_VERTEX].MaxTextureImageUnits >= 16);
311 const bool ver_3_2 = (ver_3_1 &&
312 consts->GLSLVersion >= 150 &&
313 extensions->ARB_depth_clamp &&
314 extensions->ARB_draw_elements_base_vertex &&
315 extensions->ARB_fragment_coord_conventions &&
316 extensions->EXT_provoking_vertex &&
317 extensions->ARB_seamless_cube_map &&
318 extensions->ARB_sync &&
319 extensions->ARB_texture_multisample &&
320 extensions->EXT_vertex_array_bgra);
321 const bool ver_3_3 = (ver_3_2 &&
322 consts->GLSLVersion >= 330 &&
323 extensions->ARB_blend_func_extended &&
324 extensions->ARB_explicit_attrib_location &&
325 extensions->ARB_instanced_arrays &&
326 extensions->ARB_occlusion_query2 &&
327 extensions->ARB_shader_bit_encoding &&
328 extensions->ARB_texture_rgb10_a2ui &&
329 extensions->ARB_timer_query &&
330 extensions->ARB_vertex_type_2_10_10_10_rev &&
331 extensions->EXT_texture_swizzle);
332 /* ARB_sampler_objects is always enabled in mesa */
333
334 const bool ver_4_0 = (ver_3_3 &&
335 consts->GLSLVersion >= 400 &&
336 extensions->ARB_draw_buffers_blend &&
337 extensions->ARB_draw_indirect &&
338 extensions->ARB_gpu_shader5 &&
339 extensions->ARB_gpu_shader_fp64 &&
340 extensions->ARB_sample_shading &&
341 extensions->ARB_tessellation_shader &&
342 extensions->ARB_texture_buffer_object_rgb32 &&
343 extensions->ARB_texture_cube_map_array &&
344 extensions->ARB_texture_query_lod &&
345 extensions->ARB_transform_feedback2 &&
346 extensions->ARB_transform_feedback3);
347 const bool ver_4_1 = (ver_4_0 &&
348 consts->GLSLVersion >= 410 &&
349 consts->MaxTextureSize >= 16384 &&
350 consts->MaxRenderbufferSize >= 16384 &&
351 extensions->ARB_ES2_compatibility &&
352 extensions->ARB_shader_precision &&
353 extensions->ARB_vertex_attrib_64bit &&
354 extensions->ARB_viewport_array);
355 const bool ver_4_2 = (ver_4_1 &&
356 consts->GLSLVersion >= 420 &&
357 extensions->ARB_base_instance &&
358 extensions->ARB_conservative_depth &&
359 extensions->ARB_internalformat_query &&
360 extensions->ARB_shader_atomic_counters &&
361 extensions->ARB_shader_image_load_store &&
362 extensions->ARB_shading_language_420pack &&
363 extensions->ARB_shading_language_packing &&
364 extensions->ARB_texture_compression_bptc &&
365 extensions->ARB_transform_feedback_instanced);
366 const bool ver_4_3 = (ver_4_2 &&
367 consts->GLSLVersion >= 430 &&
368 consts->Program[MESA_SHADER_VERTEX].MaxUniformBlocks >= 14 &&
369 extensions->ARB_ES3_compatibility &&
370 extensions->ARB_arrays_of_arrays &&
371 extensions->ARB_compute_shader &&
372 extensions->ARB_copy_image &&
373 extensions->ARB_explicit_uniform_location &&
374 extensions->ARB_fragment_layer_viewport &&
375 extensions->ARB_framebuffer_no_attachments &&
376 extensions->ARB_internalformat_query2 &&
377 extensions->ARB_robust_buffer_access_behavior &&
378 extensions->ARB_shader_image_size &&
379 extensions->ARB_shader_storage_buffer_object &&
380 extensions->ARB_stencil_texturing &&
381 extensions->ARB_texture_buffer_range &&
382 extensions->ARB_texture_query_levels &&
383 extensions->ARB_texture_view);
384 const bool ver_4_4 = (ver_4_3 &&
385 consts->GLSLVersion >= 440 &&
386 consts->MaxVertexAttribStride >= 2048 &&
387 extensions->ARB_buffer_storage &&
388 extensions->ARB_clear_texture &&
389 extensions->ARB_enhanced_layouts &&
390 extensions->ARB_query_buffer_object &&
391 extensions->ARB_texture_mirror_clamp_to_edge &&
392 extensions->ARB_texture_stencil8 &&
393 extensions->ARB_vertex_type_10f_11f_11f_rev);
394 const bool ver_4_5 = (ver_4_4 &&
395 consts->GLSLVersion >= 450 &&
396 extensions->ARB_ES3_1_compatibility &&
397 extensions->ARB_clip_control &&
398 extensions->ARB_conditional_render_inverted &&
399 extensions->ARB_cull_distance &&
400 extensions->ARB_derivative_control &&
401 extensions->ARB_shader_texture_image_samples &&
402 extensions->NV_texture_barrier);
403 const bool ver_4_6 = (ver_4_5 &&
404 consts->GLSLVersion >= 460 &&
405 extensions->ARB_gl_spirv &&
406 extensions->ARB_spirv_extensions &&
407 extensions->ARB_indirect_parameters &&
408 extensions->ARB_pipeline_statistics_query &&
409 extensions->ARB_polygon_offset_clamp &&
410 extensions->ARB_shader_atomic_counter_ops &&
411 extensions->ARB_shader_draw_parameters &&
412 extensions->ARB_shader_group_vote &&
413 extensions->ARB_texture_filter_anisotropic &&
414 extensions->ARB_transform_feedback_overflow_query);
415
416 if (ver_4_6) {
417 major = 4;
418 minor = 6;
419 }
420 else if (ver_4_5) {
421 major = 4;
422 minor = 5;
423 }
424 else if (ver_4_4) {
425 major = 4;
426 minor = 4;
427 }
428 else if (ver_4_3) {
429 major = 4;
430 minor = 3;
431 }
432 else if (ver_4_2) {
433 major = 4;
434 minor = 2;
435 }
436 else if (ver_4_1) {
437 major = 4;
438 minor = 1;
439 }
440 else if (ver_4_0) {
441 major = 4;
442 minor = 0;
443 }
444 else if (ver_3_3) {
445 major = 3;
446 minor = 3;
447 }
448 else if (ver_3_2) {
449 major = 3;
450 minor = 2;
451 }
452 else if (ver_3_1) {
453 major = 3;
454 minor = 1;
455 }
456 else if (ver_3_0) {
457 major = 3;
458 minor = 0;
459 }
460 else if (ver_2_1) {
461 major = 2;
462 minor = 1;
463 }
464 else if (ver_2_0) {
465 major = 2;
466 minor = 0;
467 }
468 else if (ver_1_5) {
469 major = 1;
470 minor = 5;
471 }
472 else if (ver_1_4) {
473 major = 1;
474 minor = 4;
475 }
476 else if (ver_1_3) {
477 major = 1;
478 minor = 3;
479 }
480 else {
481 major = 1;
482 minor = 2;
483 }
484
485 version = major * 10 + minor;
486
487 if (api == API_OPENGL_CORE && version < 31)
488 return 0;
489
490 return version;
491 }
492
493 static GLuint
compute_version_es1(const struct gl_extensions * extensions)494 compute_version_es1(const struct gl_extensions *extensions)
495 {
496 /* OpenGL ES 1.0 is derived from OpenGL 1.3 */
497 const bool ver_1_0 = (extensions->ARB_texture_env_combine &&
498 extensions->ARB_texture_env_dot3);
499 /* OpenGL ES 1.1 is derived from OpenGL 1.5 */
500 const bool ver_1_1 = (ver_1_0 &&
501 extensions->EXT_point_parameters);
502
503 if (ver_1_1) {
504 return 11;
505 } else if (ver_1_0) {
506 return 10;
507 } else {
508 return 0;
509 }
510 }
511
512 static GLuint
compute_version_es2(const struct gl_extensions * extensions,const struct gl_constants * consts)513 compute_version_es2(const struct gl_extensions *extensions,
514 const struct gl_constants *consts)
515 {
516 /* OpenGL ES 2.0 is derived from OpenGL 2.0 */
517 const bool ver_2_0 = (extensions->ARB_texture_cube_map &&
518 extensions->EXT_blend_color &&
519 extensions->EXT_blend_func_separate &&
520 extensions->EXT_blend_minmax &&
521 extensions->ARB_vertex_shader &&
522 extensions->ARB_fragment_shader &&
523 extensions->ARB_texture_non_power_of_two &&
524 extensions->EXT_blend_equation_separate);
525 /* FINISHME: This list isn't quite right. */
526 const bool ver_3_0 = (extensions->ARB_half_float_vertex &&
527 extensions->ARB_internalformat_query &&
528 extensions->ARB_map_buffer_range &&
529 extensions->ARB_shader_texture_lod &&
530 extensions->OES_texture_float &&
531 extensions->OES_texture_half_float &&
532 extensions->OES_texture_half_float_linear &&
533 extensions->ARB_texture_rg &&
534 extensions->ARB_depth_buffer_float &&
535 extensions->ARB_framebuffer_object &&
536 extensions->EXT_sRGB &&
537 extensions->EXT_packed_float &&
538 extensions->EXT_texture_array &&
539 extensions->EXT_texture_shared_exponent &&
540 extensions->EXT_texture_sRGB &&
541 extensions->EXT_transform_feedback &&
542 extensions->ARB_draw_instanced &&
543 extensions->ARB_uniform_buffer_object &&
544 extensions->EXT_texture_snorm &&
545 (extensions->NV_primitive_restart ||
546 consts->PrimitiveRestartFixedIndex) &&
547 extensions->OES_depth_texture_cube_map &&
548 extensions->EXT_texture_type_2_10_10_10_REV &&
549 consts->MaxColorAttachments >= 4);
550 const bool es31_compute_shader =
551 consts->MaxComputeWorkGroupInvocations >= 128 &&
552 consts->Program[MESA_SHADER_COMPUTE].MaxShaderStorageBlocks &&
553 consts->Program[MESA_SHADER_COMPUTE].MaxAtomicBuffers &&
554 consts->Program[MESA_SHADER_COMPUTE].MaxImageUniforms;
555 const bool ver_3_1 = (ver_3_0 &&
556 consts->MaxVertexAttribStride >= 2048 &&
557 extensions->ARB_arrays_of_arrays &&
558 es31_compute_shader &&
559 extensions->ARB_draw_indirect &&
560 extensions->ARB_explicit_uniform_location &&
561 extensions->ARB_framebuffer_no_attachments &&
562 extensions->ARB_shading_language_packing &&
563 extensions->ARB_stencil_texturing &&
564 extensions->ARB_texture_multisample &&
565 extensions->ARB_texture_gather &&
566 extensions->MESA_shader_integer_functions &&
567 extensions->EXT_shader_integer_mix);
568 const bool ver_3_2 = (ver_3_1 &&
569 /* ES 3.2 requires that images/buffers be accessible
570 * from fragment shaders as well
571 */
572 extensions->ARB_shader_atomic_counters &&
573 extensions->ARB_shader_image_load_store &&
574 extensions->ARB_shader_image_size &&
575 extensions->ARB_shader_storage_buffer_object &&
576
577 extensions->EXT_draw_buffers2 &&
578 extensions->KHR_blend_equation_advanced &&
579 extensions->KHR_robustness &&
580 extensions->KHR_texture_compression_astc_ldr &&
581 extensions->OES_copy_image &&
582 extensions->ARB_draw_buffers_blend &&
583 extensions->ARB_draw_elements_base_vertex &&
584 extensions->OES_geometry_shader &&
585 extensions->OES_primitive_bounding_box &&
586 extensions->OES_sample_variables &&
587 extensions->ARB_tessellation_shader &&
588 extensions->ARB_texture_border_clamp &&
589 extensions->OES_texture_buffer &&
590 extensions->OES_texture_cube_map_array &&
591 extensions->ARB_texture_stencil8);
592
593 if (ver_3_2) {
594 return 32;
595 } else if (ver_3_1) {
596 return 31;
597 } else if (ver_3_0) {
598 return 30;
599 } else if (ver_2_0) {
600 return 20;
601 } else {
602 return 0;
603 }
604 }
605
606 GLuint
_mesa_get_version(const struct gl_extensions * extensions,struct gl_constants * consts,gl_api api)607 _mesa_get_version(const struct gl_extensions *extensions,
608 struct gl_constants *consts, gl_api api)
609 {
610 switch (api) {
611 case API_OPENGL_COMPAT:
612 /* Disable higher GLSL versions for legacy contexts.
613 * This disallows creation of higher compatibility contexts. */
614 if (!consts->AllowHigherCompatVersion) {
615 consts->GLSLVersion = consts->GLSLVersionCompat;
616 }
617 FALLTHROUGH;
618 case API_OPENGL_CORE:
619 return compute_version(extensions, consts, api);
620 case API_OPENGLES:
621 return compute_version_es1(extensions);
622 case API_OPENGLES2:
623 return compute_version_es2(extensions, consts);
624 }
625 return 0;
626 }
627
628 /**
629 * Set the context's Version and VersionString fields.
630 * This should only be called once as part of context initialization
631 * or to perform version check for GLX_ARB_create_context_profile.
632 */
633 void
_mesa_compute_version(struct gl_context * ctx)634 _mesa_compute_version(struct gl_context *ctx)
635 {
636 if (ctx->Version)
637 goto done;
638
639 ctx->Version = _mesa_get_version(&ctx->Extensions, &ctx->Const, ctx->API);
640 ctx->Extensions.Version = ctx->Version;
641
642 /* Make sure that the GLSL version lines up with the GL version. In some
643 * cases it can be too high, e.g. if an extension is missing.
644 */
645 if (_mesa_is_desktop_gl(ctx)) {
646 switch (ctx->Version) {
647 case 20:
648 FALLTHROUGH; /* GLSL 1.20 is the minimum we support */
649 case 21:
650 ctx->Const.GLSLVersion = 120;
651 break;
652 case 30:
653 ctx->Const.GLSLVersion = 130;
654 break;
655 case 31:
656 ctx->Const.GLSLVersion = 140;
657 break;
658 case 32:
659 ctx->Const.GLSLVersion = 150;
660 break;
661 default:
662 if (ctx->Version >= 33)
663 ctx->Const.GLSLVersion = ctx->Version * 10;
664 break;
665 }
666 }
667
668 switch (ctx->API) {
669 case API_OPENGL_COMPAT:
670 case API_OPENGL_CORE:
671 create_version_string(ctx, "");
672 break;
673
674 case API_OPENGLES:
675 if (!ctx->Version) {
676 _mesa_problem(ctx, "Incomplete OpenGL ES 1.0 support.");
677 return;
678 }
679 create_version_string(ctx, "OpenGL ES-CM ");
680 break;
681
682 case API_OPENGLES2:
683 if (!ctx->Version) {
684 _mesa_problem(ctx, "Incomplete OpenGL ES 2.0 support.");
685 return;
686 }
687 create_version_string(ctx, "OpenGL ES ");
688 break;
689 }
690
691 done:
692 if (ctx->API == API_OPENGL_COMPAT && ctx->Version >= 31)
693 ctx->Extensions.ARB_compatibility = GL_TRUE;
694
695 /* Precompute valid primitive types for faster draw time validation. */
696 /* All primitive type enums are less than 32, so we can use the shift. */
697 ctx->SupportedPrimMask = (1 << GL_POINTS) |
698 (1 << GL_LINES) |
699 (1 << GL_LINE_LOOP) |
700 (1 << GL_LINE_STRIP) |
701 (1 << GL_TRIANGLES) |
702 (1 << GL_TRIANGLE_STRIP) |
703 (1 << GL_TRIANGLE_FAN);
704
705 if (ctx->API == API_OPENGL_COMPAT) {
706 ctx->SupportedPrimMask |= (1 << GL_QUADS) |
707 (1 << GL_QUAD_STRIP) |
708 (1 << GL_POLYGON);
709 }
710
711 if (_mesa_has_geometry_shaders(ctx)) {
712 ctx->SupportedPrimMask |= (1 << GL_LINES_ADJACENCY) |
713 (1 << GL_LINE_STRIP_ADJACENCY) |
714 (1 << GL_TRIANGLES_ADJACENCY) |
715 (1 << GL_TRIANGLE_STRIP_ADJACENCY);
716 }
717
718 if (_mesa_has_tessellation(ctx))
719 ctx->SupportedPrimMask |= 1 << GL_PATCHES;
720
721 /* First time initialization. */
722 _mesa_update_valid_to_render_state(ctx);
723 }
724
725
726 void
_mesa_get_driver_uuid(struct gl_context * ctx,GLint * uuid)727 _mesa_get_driver_uuid(struct gl_context *ctx, GLint *uuid)
728 {
729 ctx->Driver.GetDriverUuid(ctx, (char*) uuid);
730 }
731
732 void
_mesa_get_device_uuid(struct gl_context * ctx,GLint * uuid)733 _mesa_get_device_uuid(struct gl_context *ctx, GLint *uuid)
734 {
735 ctx->Driver.GetDeviceUuid(ctx, (char*) uuid);
736 }
737
738 /**
739 * Get the i-th GLSL version string. If index=0, return the most recent
740 * supported version.
741 * \param ctx context to query
742 * \param index which version string to return, or -1 if none
743 * \param versionOut returns the vesrion string
744 * \return total number of shading language versions.
745 */
746 int
_mesa_get_shading_language_version(const struct gl_context * ctx,int index,char ** versionOut)747 _mesa_get_shading_language_version(const struct gl_context *ctx,
748 int index,
749 char **versionOut)
750 {
751 int n = 0;
752
753 #define GLSL_VERSION(S) \
754 if (n++ == index) \
755 *versionOut = S
756
757 /* GLSL core */
758 if (ctx->Const.GLSLVersion >= 460)
759 GLSL_VERSION("460");
760 if (ctx->Const.GLSLVersion >= 450)
761 GLSL_VERSION("450");
762 if (ctx->Const.GLSLVersion >= 440)
763 GLSL_VERSION("440");
764 if (ctx->Const.GLSLVersion >= 430)
765 GLSL_VERSION("430");
766 if (ctx->Const.GLSLVersion >= 420)
767 GLSL_VERSION("420");
768 if (ctx->Const.GLSLVersion >= 410)
769 GLSL_VERSION("410");
770 if (ctx->Const.GLSLVersion >= 400)
771 GLSL_VERSION("400");
772 if (ctx->Const.GLSLVersion >= 330)
773 GLSL_VERSION("330");
774 if (ctx->Const.GLSLVersion >= 150)
775 GLSL_VERSION("150");
776 if (ctx->Const.GLSLVersion >= 140)
777 GLSL_VERSION("140");
778 if (ctx->Const.GLSLVersion >= 130)
779 GLSL_VERSION("130");
780 if (ctx->Const.GLSLVersion >= 120)
781 GLSL_VERSION("120");
782 /* The GL spec says to return the empty string for GLSL 1.10 */
783 if (ctx->Const.GLSLVersion >= 110)
784 GLSL_VERSION("");
785
786 /* GLSL es */
787 if ((ctx->API == API_OPENGLES2 && ctx->Version >= 32) ||
788 ctx->Extensions.ARB_ES3_2_compatibility)
789 GLSL_VERSION("320 es");
790 if (_mesa_is_gles31(ctx) || ctx->Extensions.ARB_ES3_1_compatibility)
791 GLSL_VERSION("310 es");
792 if (_mesa_is_gles3(ctx) || ctx->Extensions.ARB_ES3_compatibility)
793 GLSL_VERSION("300 es");
794 if (ctx->API == API_OPENGLES2 || ctx->Extensions.ARB_ES2_compatibility)
795 GLSL_VERSION("100");
796
797 #undef GLSL_VERSION
798
799 return n;
800 }
801