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 #include "state_tracker/st_context.h"
38
39 static simple_mtx_t override_lock = SIMPLE_MTX_INITIALIZER;
40
41 /**
42 * Scans 'string' to see if it ends with 'ending'.
43 */
44 static bool
check_for_ending(const char * string,const char * ending)45 check_for_ending(const char *string, const char *ending)
46 {
47 const size_t len1 = strlen(string);
48 const size_t len2 = strlen(ending);
49
50 if (len2 > len1)
51 return false;
52
53 return strcmp(string + (len1 - len2), ending) == 0;
54 }
55
56 /**
57 * Returns the gl override data
58 *
59 * version > 0 indicates there is an override requested
60 * fwd_context is only valid if version > 0
61 */
62 static void
get_gl_override(gl_api api,int * version,bool * fwd_context,bool * compat_context)63 get_gl_override(gl_api api, int *version, bool *fwd_context,
64 bool *compat_context)
65 {
66 const char *env_var = (api == API_OPENGL_CORE || api == API_OPENGL_COMPAT)
67 ? "MESA_GL_VERSION_OVERRIDE" : "MESA_GLES_VERSION_OVERRIDE";
68 const char *version_str;
69 int major, minor, n;
70 static struct override_info {
71 int version;
72 bool fc_suffix;
73 bool compat_suffix;
74 } override[] = {
75 [API_OPENGL_COMPAT] = { -1, false, false},
76 [API_OPENGLES] = { -1, false, false},
77 [API_OPENGLES2] = { -1, false, false},
78 [API_OPENGL_CORE] = { -1, false, false},
79 };
80
81 STATIC_ASSERT(ARRAY_SIZE(override) == API_OPENGL_LAST + 1);
82
83 simple_mtx_lock(&override_lock);
84
85 if (api == API_OPENGLES)
86 goto exit;
87
88 if (override[api].version < 0) {
89 override[api].version = 0;
90
91 version_str = os_get_option(env_var);
92 if (version_str) {
93 override[api].fc_suffix = check_for_ending(version_str, "FC");
94 override[api].compat_suffix = check_for_ending(version_str, "COMPAT");
95
96 n = sscanf(version_str, "%u.%u", &major, &minor);
97 if (n != 2) {
98 fprintf(stderr, "error: invalid value for %s: %s\n",
99 env_var, version_str);
100 override[api].version = 0;
101 } else {
102 override[api].version = major * 10 + minor;
103
104 /* There is no such thing as compatibility or forward-compatible for
105 * OpenGL ES 2.0 or 3.x APIs.
106 */
107 if ((override[api].version < 30 && override[api].fc_suffix) ||
108 (api == API_OPENGLES2 && (override[api].fc_suffix ||
109 override[api].compat_suffix))) {
110 fprintf(stderr, "error: invalid value for %s: %s\n",
111 env_var, version_str);
112 }
113 }
114 }
115 }
116
117 exit:
118 *version = override[api].version;
119 *fwd_context = override[api].fc_suffix;
120 *compat_context = override[api].compat_suffix;
121
122 simple_mtx_unlock(&override_lock);
123 }
124
125 /**
126 * Builds the Mesa version string.
127 */
128 static void
create_version_string(struct gl_context * ctx,const char * prefix)129 create_version_string(struct gl_context *ctx, const char *prefix)
130 {
131 static const int max = 100;
132
133 ctx->VersionString = malloc(max);
134 if (ctx->VersionString) {
135 snprintf(ctx->VersionString, max,
136 "%s%u.%u%s Mesa " PACKAGE_VERSION MESA_GIT_SHA1,
137 prefix,
138 ctx->Version / 10, ctx->Version % 10,
139 _mesa_is_desktop_gl_core(ctx) ? " (Core Profile)" :
140 (_mesa_is_desktop_gl_compat(ctx) && ctx->Version >= 32) ?
141 " (Compatibility Profile)" : ""
142 );
143 }
144 }
145
146 /**
147 * Override the context's version and/or API type if the environment variables
148 * MESA_GL_VERSION_OVERRIDE or MESA_GLES_VERSION_OVERRIDE are set.
149 *
150 * Example uses of MESA_GL_VERSION_OVERRIDE:
151 *
152 * 2.1: select a compatibility (non-Core) profile with GL version 2.1.
153 * 3.0: select a compatibility (non-Core) profile with GL version 3.0.
154 * 3.0FC: select a Core+Forward Compatible profile with GL version 3.0.
155 * 3.1: select GL version 3.1 with GL_ARB_compatibility enabled per the driver default.
156 * 3.1FC: select GL version 3.1 with forward compatibility and GL_ARB_compatibility disabled.
157 * 3.1COMPAT: select GL version 3.1 with GL_ARB_compatibility enabled.
158 * X.Y: override GL version to X.Y without changing the profile.
159 * X.YFC: select a Core+Forward Compatible profile with GL version X.Y.
160 * X.YCOMPAT: select a Compatibility profile with GL version X.Y.
161 *
162 * Example uses of MESA_GLES_VERSION_OVERRIDE:
163 *
164 * 2.0: select GLES version 2.0.
165 * 3.0: select GLES version 3.0.
166 * 3.1: select GLES version 3.1.
167 */
168 bool
_mesa_override_gl_version_contextless(struct gl_constants * consts,gl_api * apiOut,GLuint * versionOut)169 _mesa_override_gl_version_contextless(struct gl_constants *consts,
170 gl_api *apiOut, GLuint *versionOut)
171 {
172 int version;
173 bool fwd_context, compat_context;
174
175 get_gl_override(*apiOut, &version, &fwd_context, &compat_context);
176
177 if (version > 0) {
178 *versionOut = version;
179
180 /* Modify the API and context flags as needed. */
181 if (*apiOut == API_OPENGL_CORE || *apiOut == API_OPENGL_COMPAT) {
182 if (version >= 30 && fwd_context) {
183 *apiOut = API_OPENGL_CORE;
184 consts->ContextFlags |= GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT;
185 } else if (compat_context) {
186 *apiOut = API_OPENGL_COMPAT;
187 }
188 }
189
190 return true;
191 }
192 return false;
193 }
194
195 void
_mesa_override_gl_version(struct gl_context * ctx)196 _mesa_override_gl_version(struct gl_context *ctx)
197 {
198 if (_mesa_override_gl_version_contextless(&ctx->Const, &ctx->API,
199 &ctx->Version)) {
200 /* We need to include API in version string for OpenGL ES, otherwise
201 * application can not detect GLES via glGetString(GL_VERSION) query.
202 *
203 * From OpenGL ES 3.2 spec, Page 436:
204 *
205 * "The VERSION string is laid out as follows:
206 *
207 * OpenGL ES N.M vendor-specific information"
208 *
209 * From OpenGL 4.5 spec, Page 538:
210 *
211 * "The VERSION and SHADING_LANGUAGE_VERSION strings are laid out as
212 * follows:
213 *
214 * <version number><space><vendor-specific information>"
215 */
216 create_version_string(ctx, _mesa_is_gles(ctx) ? "OpenGL ES " : "");
217 ctx->Extensions.Version = ctx->Version;
218 }
219 }
220
221 /**
222 * Override the context's GLSL version if the environment variable
223 * MESA_GLSL_VERSION_OVERRIDE is set. Valid values for
224 * MESA_GLSL_VERSION_OVERRIDE are integers, such as "130".
225 */
226 void
_mesa_override_glsl_version(struct gl_constants * consts)227 _mesa_override_glsl_version(struct gl_constants *consts)
228 {
229 const char *env_var = "MESA_GLSL_VERSION_OVERRIDE";
230 const char *version;
231 int n;
232
233 version = getenv(env_var);
234 if (!version) {
235 return;
236 }
237
238 n = sscanf(version, "%u", &consts->GLSLVersion);
239 if (n != 1) {
240 fprintf(stderr, "error: invalid value for %s: %s\n", env_var, version);
241 return;
242 }
243 }
244
245 /**
246 * Examine enabled GL extensions to determine GL version.
247 */
248 static GLuint
compute_version(const struct gl_extensions * extensions,const struct gl_constants * consts,gl_api api)249 compute_version(const struct gl_extensions *extensions,
250 const struct gl_constants *consts, gl_api api)
251 {
252 GLuint major, minor, version;
253
254 const bool ver_1_4 = (extensions->ARB_shadow);
255 const bool ver_1_5 = ver_1_4;
256 const bool ver_2_0 = (ver_1_5 &&
257 extensions->ARB_vertex_shader &&
258 extensions->ARB_fragment_shader &&
259 extensions->ARB_texture_non_power_of_two &&
260 extensions->EXT_blend_equation_separate &&
261 extensions->EXT_stencil_two_side);
262 const bool ver_2_1 = (ver_2_0 &&
263 extensions->EXT_texture_sRGB);
264 /* We lie about the minimum number of color attachments. Strictly, OpenGL
265 * 3.0 requires 8, whereas OpenGL ES requires 4. OpenGL ES 3.0 class
266 * hardware may only support 4 render targets. Advertise non-conformant
267 * OpenGL 3.0 anyway. Affects freedreno on a3xx
268 */
269 const bool ver_3_0 = (ver_2_1 &&
270 consts->GLSLVersion >= 130 &&
271 consts->MaxColorAttachments >= 4 &&
272 (consts->MaxSamples >= 4 || consts->FakeSWMSAA) &&
273 (api == API_OPENGL_CORE ||
274 extensions->ARB_color_buffer_float) &&
275 extensions->ARB_depth_buffer_float &&
276 extensions->ARB_half_float_vertex &&
277 extensions->ARB_map_buffer_range &&
278 extensions->ARB_shader_texture_lod &&
279 extensions->ARB_texture_float &&
280 extensions->ARB_texture_rg &&
281 extensions->ARB_texture_compression_rgtc &&
282 extensions->EXT_draw_buffers2 &&
283 extensions->ARB_framebuffer_object &&
284 extensions->EXT_framebuffer_sRGB &&
285 extensions->EXT_packed_float &&
286 extensions->EXT_texture_array &&
287 extensions->EXT_texture_shared_exponent &&
288 extensions->EXT_transform_feedback &&
289 extensions->NV_conditional_render);
290 const bool ver_3_1 = (ver_3_0 &&
291 consts->GLSLVersion >= 140 &&
292 extensions->ARB_draw_instanced &&
293 extensions->ARB_texture_buffer_object &&
294 extensions->ARB_uniform_buffer_object &&
295 extensions->EXT_texture_snorm &&
296 extensions->NV_primitive_restart &&
297 extensions->NV_texture_rectangle &&
298 consts->Program[MESA_SHADER_VERTEX].MaxTextureImageUnits >= 16);
299 const bool ver_3_2 = (ver_3_1 &&
300 consts->GLSLVersion >= 150 &&
301 extensions->ARB_depth_clamp &&
302 extensions->ARB_draw_elements_base_vertex &&
303 extensions->ARB_fragment_coord_conventions &&
304 extensions->EXT_provoking_vertex &&
305 extensions->ARB_seamless_cube_map &&
306 extensions->ARB_sync &&
307 extensions->ARB_texture_multisample &&
308 extensions->EXT_vertex_array_bgra);
309 const bool ver_3_3 = (ver_3_2 &&
310 consts->GLSLVersion >= 330 &&
311 extensions->ARB_blend_func_extended &&
312 extensions->ARB_explicit_attrib_location &&
313 extensions->ARB_instanced_arrays &&
314 extensions->ARB_shader_bit_encoding &&
315 extensions->ARB_texture_rgb10_a2ui &&
316 extensions->ARB_timer_query &&
317 extensions->ARB_vertex_type_2_10_10_10_rev &&
318 extensions->EXT_texture_swizzle);
319 /* ARB_sampler_objects is always enabled in mesa */
320
321 const bool ver_4_0 = (ver_3_3 &&
322 consts->GLSLVersion >= 400 &&
323 extensions->ARB_draw_buffers_blend &&
324 extensions->ARB_draw_indirect &&
325 extensions->ARB_gpu_shader5 &&
326 extensions->ARB_gpu_shader_fp64 &&
327 extensions->ARB_sample_shading &&
328 extensions->ARB_tessellation_shader &&
329 extensions->ARB_texture_buffer_object_rgb32 &&
330 extensions->ARB_texture_cube_map_array &&
331 extensions->ARB_texture_query_lod &&
332 extensions->ARB_transform_feedback2 &&
333 extensions->ARB_transform_feedback3);
334 const bool ver_4_1 = (ver_4_0 &&
335 consts->GLSLVersion >= 410 &&
336 consts->MaxTextureSize >= 16384 &&
337 consts->MaxRenderbufferSize >= 16384 &&
338 consts->MaxCubeTextureLevels >= 15 &&
339 consts->Max3DTextureLevels >= 12 &&
340 consts->MaxArrayTextureLayers >= 2048 &&
341 extensions->ARB_ES2_compatibility &&
342 extensions->ARB_shader_precision &&
343 extensions->ARB_vertex_attrib_64bit &&
344 extensions->ARB_viewport_array);
345 const bool ver_4_2 = (ver_4_1 &&
346 consts->GLSLVersion >= 420 &&
347 extensions->ARB_base_instance &&
348 extensions->ARB_conservative_depth &&
349 extensions->ARB_internalformat_query &&
350 extensions->ARB_shader_atomic_counters &&
351 extensions->ARB_shader_image_load_store &&
352 extensions->ARB_shading_language_420pack &&
353 extensions->ARB_shading_language_packing &&
354 extensions->ARB_texture_compression_bptc &&
355 extensions->ARB_transform_feedback_instanced);
356 const bool ver_4_3 = (ver_4_2 &&
357 consts->GLSLVersion >= 430 &&
358 consts->Program[MESA_SHADER_VERTEX].MaxUniformBlocks >= 14 &&
359 extensions->ARB_ES3_compatibility &&
360 extensions->ARB_arrays_of_arrays &&
361 extensions->ARB_compute_shader &&
362 extensions->ARB_copy_image &&
363 extensions->ARB_explicit_uniform_location &&
364 extensions->ARB_fragment_layer_viewport &&
365 extensions->ARB_framebuffer_no_attachments &&
366 extensions->ARB_internalformat_query2 &&
367 extensions->ARB_robust_buffer_access_behavior &&
368 extensions->ARB_shader_image_size &&
369 extensions->ARB_shader_storage_buffer_object &&
370 extensions->ARB_stencil_texturing &&
371 extensions->ARB_texture_buffer_range &&
372 extensions->ARB_texture_query_levels &&
373 extensions->ARB_texture_view);
374 const bool ver_4_4 = (ver_4_3 &&
375 consts->GLSLVersion >= 440 &&
376 consts->MaxVertexAttribStride >= 2048 &&
377 extensions->ARB_buffer_storage &&
378 extensions->ARB_enhanced_layouts &&
379 extensions->ARB_query_buffer_object &&
380 extensions->ARB_texture_mirror_clamp_to_edge &&
381 extensions->ARB_texture_stencil8 &&
382 extensions->ARB_vertex_type_10f_11f_11f_rev);
383 const bool ver_4_5 = (ver_4_4 &&
384 consts->GLSLVersion >= 450 &&
385 extensions->ARB_ES3_1_compatibility &&
386 extensions->ARB_clip_control &&
387 extensions->ARB_conditional_render_inverted &&
388 extensions->ARB_cull_distance &&
389 extensions->ARB_derivative_control &&
390 extensions->ARB_shader_texture_image_samples &&
391 extensions->NV_texture_barrier);
392 const bool ver_4_6 = (ver_4_5 &&
393 consts->GLSLVersion >= 460 &&
394 extensions->ARB_gl_spirv &&
395 extensions->ARB_spirv_extensions &&
396 extensions->ARB_indirect_parameters &&
397 extensions->ARB_polygon_offset_clamp &&
398 extensions->ARB_shader_atomic_counter_ops &&
399 extensions->ARB_shader_draw_parameters &&
400 extensions->ARB_shader_group_vote &&
401 extensions->ARB_texture_filter_anisotropic &&
402 extensions->ARB_transform_feedback_overflow_query);
403
404 if (ver_4_6) {
405 major = 4;
406 minor = 6;
407 }
408 else if (ver_4_5) {
409 major = 4;
410 minor = 5;
411 }
412 else if (ver_4_4) {
413 major = 4;
414 minor = 4;
415 }
416 else if (ver_4_3) {
417 major = 4;
418 minor = 3;
419 }
420 else if (ver_4_2) {
421 major = 4;
422 minor = 2;
423 }
424 else if (ver_4_1) {
425 major = 4;
426 minor = 1;
427 }
428 else if (ver_4_0) {
429 major = 4;
430 minor = 0;
431 }
432 else if (ver_3_3) {
433 major = 3;
434 minor = 3;
435 }
436 else if (ver_3_2) {
437 major = 3;
438 minor = 2;
439 }
440 else if (ver_3_1) {
441 major = 3;
442 minor = 1;
443 }
444 else if (ver_3_0) {
445 major = 3;
446 minor = 0;
447 }
448 else if (ver_2_1) {
449 major = 2;
450 minor = 1;
451 }
452 else if (ver_2_0) {
453 major = 2;
454 minor = 0;
455 }
456 else if (ver_1_5) {
457 major = 1;
458 minor = 5;
459 }
460 else if (ver_1_4) {
461 major = 1;
462 minor = 4;
463 }
464 else {
465 major = 1;
466 minor = 3;
467 }
468
469 version = major * 10 + minor;
470
471 if (api == API_OPENGL_CORE && version < 31)
472 return 0;
473
474 return version;
475 }
476
477 static GLuint
compute_version_es2(const struct gl_extensions * extensions,const struct gl_constants * consts)478 compute_version_es2(const struct gl_extensions *extensions,
479 const struct gl_constants *consts)
480 {
481 /* OpenGL ES 2.0 is derived from OpenGL 2.0 */
482 const bool ver_2_0 = (extensions->ARB_vertex_shader &&
483 extensions->ARB_fragment_shader &&
484 extensions->ARB_texture_non_power_of_two &&
485 extensions->EXT_blend_equation_separate);
486 /* FINISHME: This list isn't quite right. */
487 const bool ver_3_0 = (extensions->ARB_half_float_vertex &&
488 extensions->ARB_internalformat_query &&
489 extensions->ARB_map_buffer_range &&
490 extensions->ARB_shader_texture_lod &&
491 extensions->OES_texture_float &&
492 extensions->OES_texture_half_float &&
493 extensions->OES_texture_half_float_linear &&
494 extensions->ARB_texture_rg &&
495 extensions->ARB_depth_buffer_float &&
496 extensions->ARB_framebuffer_object &&
497 extensions->EXT_sRGB &&
498 extensions->EXT_packed_float &&
499 extensions->EXT_texture_array &&
500 extensions->EXT_texture_shared_exponent &&
501 extensions->EXT_texture_sRGB &&
502 extensions->EXT_transform_feedback &&
503 extensions->ARB_draw_instanced &&
504 extensions->ARB_instanced_arrays &&
505 extensions->ARB_uniform_buffer_object &&
506 extensions->EXT_texture_snorm &&
507 (extensions->NV_primitive_restart ||
508 consts->PrimitiveRestartFixedIndex) &&
509 extensions->OES_depth_texture_cube_map &&
510 extensions->EXT_texture_type_2_10_10_10_REV &&
511 consts->MaxColorAttachments >= 4);
512 const bool es31_compute_shader =
513 consts->MaxComputeWorkGroupInvocations >= 128 &&
514 consts->Program[MESA_SHADER_COMPUTE].MaxShaderStorageBlocks &&
515 consts->Program[MESA_SHADER_COMPUTE].MaxAtomicBuffers &&
516 consts->Program[MESA_SHADER_COMPUTE].MaxImageUniforms;
517 const bool ver_3_1 = (ver_3_0 &&
518 consts->MaxVertexAttribStride >= 2048 &&
519 extensions->ARB_arrays_of_arrays &&
520 es31_compute_shader &&
521 extensions->ARB_draw_indirect &&
522 extensions->ARB_explicit_uniform_location &&
523 extensions->ARB_framebuffer_no_attachments &&
524 extensions->ARB_shading_language_packing &&
525 extensions->ARB_stencil_texturing &&
526 extensions->ARB_texture_multisample &&
527 extensions->ARB_texture_gather &&
528 extensions->MESA_shader_integer_functions &&
529 extensions->EXT_shader_integer_mix);
530 const bool ver_3_2 = (ver_3_1 &&
531 /* ES 3.2 requires that images/buffers be accessible
532 * from fragment shaders as well
533 */
534 extensions->ARB_shader_atomic_counters &&
535 extensions->ARB_shader_image_load_store &&
536 extensions->ARB_shader_image_size &&
537 extensions->ARB_shader_storage_buffer_object &&
538 extensions->EXT_color_buffer_float &&
539 extensions->EXT_draw_buffers2 &&
540 extensions->KHR_blend_equation_advanced &&
541 extensions->KHR_robustness &&
542 extensions->KHR_texture_compression_astc_ldr &&
543 extensions->OES_copy_image &&
544 extensions->ARB_draw_buffers_blend &&
545 extensions->ARB_draw_elements_base_vertex &&
546 extensions->OES_geometry_shader &&
547 extensions->OES_primitive_bounding_box &&
548 extensions->OES_sample_variables &&
549 extensions->ARB_tessellation_shader &&
550 extensions->OES_texture_buffer &&
551 extensions->OES_texture_cube_map_array &&
552 extensions->ARB_texture_stencil8);
553
554 if (ver_3_2) {
555 return 32;
556 } else if (ver_3_1) {
557 return 31;
558 } else if (ver_3_0) {
559 return 30;
560 } else if (ver_2_0) {
561 return 20;
562 } else {
563 return 0;
564 }
565 }
566
567 GLuint
_mesa_get_version(const struct gl_extensions * extensions,struct gl_constants * consts,gl_api api)568 _mesa_get_version(const struct gl_extensions *extensions,
569 struct gl_constants *consts, gl_api api)
570 {
571 switch (api) {
572 case API_OPENGL_COMPAT:
573 /* Disable higher GLSL versions for legacy contexts.
574 * This disallows creation of higher compatibility contexts. */
575 if (!consts->AllowHigherCompatVersion) {
576 consts->GLSLVersion = consts->GLSLVersionCompat;
577 }
578 FALLTHROUGH;
579 case API_OPENGL_CORE:
580 return compute_version(extensions, consts, api);
581 case API_OPENGLES:
582 return 11;
583 case API_OPENGLES2:
584 return compute_version_es2(extensions, consts);
585 }
586 return 0;
587 }
588
589 /**
590 * Set the context's Version and VersionString fields.
591 * This should only be called once as part of context initialization
592 * or to perform version check for GLX_ARB_create_context_profile.
593 */
594 void
_mesa_compute_version(struct gl_context * ctx)595 _mesa_compute_version(struct gl_context *ctx)
596 {
597 if (ctx->Version)
598 goto done;
599
600 ctx->Version = _mesa_get_version(&ctx->Extensions, &ctx->Const, ctx->API);
601 ctx->Extensions.Version = ctx->Version;
602
603 /* Make sure that the GLSL version lines up with the GL version. In some
604 * cases it can be too high, e.g. if an extension is missing.
605 */
606 if (_mesa_is_desktop_gl(ctx)) {
607 switch (ctx->Version) {
608 case 20:
609 FALLTHROUGH; /* GLSL 1.20 is the minimum we support */
610 case 21:
611 ctx->Const.GLSLVersion = 120;
612 break;
613 case 30:
614 ctx->Const.GLSLVersion = 130;
615 break;
616 case 31:
617 ctx->Const.GLSLVersion = 140;
618 break;
619 case 32:
620 ctx->Const.GLSLVersion = 150;
621 break;
622 default:
623 if (ctx->Version >= 33)
624 ctx->Const.GLSLVersion = ctx->Version * 10;
625 break;
626 }
627 }
628
629 switch (ctx->API) {
630 case API_OPENGL_COMPAT:
631 case API_OPENGL_CORE:
632 create_version_string(ctx, "");
633 break;
634
635 case API_OPENGLES:
636 if (!ctx->Version) {
637 _mesa_problem(ctx, "Incomplete OpenGL ES 1.0 support.");
638 return;
639 }
640 create_version_string(ctx, "OpenGL ES-CM ");
641 break;
642
643 case API_OPENGLES2:
644 if (!ctx->Version) {
645 _mesa_problem(ctx, "Incomplete OpenGL ES 2.0 support.");
646 return;
647 }
648 create_version_string(ctx, "OpenGL ES ");
649 break;
650 }
651
652 done:
653 if (_mesa_is_desktop_gl_compat(ctx) && ctx->Version >= 31)
654 ctx->Extensions.ARB_compatibility = GL_TRUE;
655
656 /* Precompute valid primitive types for faster draw time validation. */
657 /* All primitive type enums are less than 32, so we can use the shift. */
658 ctx->SupportedPrimMask = (1 << GL_POINTS) |
659 (1 << GL_LINES) |
660 (1 << GL_LINE_LOOP) |
661 (1 << GL_LINE_STRIP) |
662 (1 << GL_TRIANGLES) |
663 (1 << GL_TRIANGLE_STRIP) |
664 (1 << GL_TRIANGLE_FAN);
665
666 if (_mesa_is_desktop_gl_compat(ctx)) {
667 ctx->SupportedPrimMask |= (1 << GL_QUADS) |
668 (1 << GL_QUAD_STRIP) |
669 (1 << GL_POLYGON);
670 }
671
672 if (_mesa_has_geometry_shaders(ctx)) {
673 ctx->SupportedPrimMask |= (1 << GL_LINES_ADJACENCY) |
674 (1 << GL_LINE_STRIP_ADJACENCY) |
675 (1 << GL_TRIANGLES_ADJACENCY) |
676 (1 << GL_TRIANGLE_STRIP_ADJACENCY);
677 }
678
679 if (_mesa_has_tessellation(ctx))
680 ctx->SupportedPrimMask |= 1 << GL_PATCHES;
681
682 /* Appendix F.2 of the OpenGL ES 3.0 spec says:
683 *
684 * "OpenGL ES 3.0 requires that all cube map filtering be
685 * seamless. OpenGL ES 2.0 specified that a single cube map face be
686 * selected and used for filtering."
687 *
688 * Now that we know our version, enable seamless filtering for GLES3 only.
689 */
690 ctx->Texture.CubeMapSeamless = _mesa_is_gles3(ctx);
691
692 /* First time initialization. */
693 _mesa_update_valid_to_render_state(ctx);
694 }
695
696
697 void
_mesa_get_driver_uuid(struct gl_context * ctx,GLint * uuid)698 _mesa_get_driver_uuid(struct gl_context *ctx, GLint *uuid)
699 {
700 struct pipe_screen *screen = ctx->pipe->screen;
701 assert(GL_UUID_SIZE_EXT >= PIPE_UUID_SIZE);
702 memset(uuid, 0, GL_UUID_SIZE_EXT);
703 screen->get_driver_uuid(screen, (char *)uuid);
704 }
705
706 void
_mesa_get_device_uuid(struct gl_context * ctx,GLint * uuid)707 _mesa_get_device_uuid(struct gl_context *ctx, GLint *uuid)
708 {
709 struct pipe_screen *screen = ctx->pipe->screen;
710 assert(GL_UUID_SIZE_EXT >= PIPE_UUID_SIZE);
711 memset(uuid, 0, GL_UUID_SIZE_EXT);
712 screen->get_device_uuid(screen, (char *)uuid);
713 }
714
715 void
_mesa_get_device_luid(struct gl_context * ctx,GLint * luid)716 _mesa_get_device_luid(struct gl_context *ctx, GLint *luid)
717 {
718 struct pipe_screen *screen = ctx->pipe->screen;
719 assert(GL_LUID_SIZE_EXT >= PIPE_LUID_SIZE);
720 memset(luid, 0, GL_UUID_SIZE_EXT);
721 screen->get_device_luid(screen, (char *)luid);
722 }
723
724 /**
725 * Get the i-th GLSL version string. If index=0, return the most recent
726 * supported version.
727 * \param ctx context to query
728 * \param index which version string to return, or -1 if none
729 * \param versionOut returns the vesrion string
730 * \return total number of shading language versions.
731 */
732 int
_mesa_get_shading_language_version(const struct gl_context * ctx,int index,char ** versionOut)733 _mesa_get_shading_language_version(const struct gl_context *ctx,
734 int index,
735 char **versionOut)
736 {
737 int n = 0;
738
739 #define GLSL_VERSION(S) \
740 if (n++ == index) \
741 *versionOut = S
742
743 /* GLSL core */
744 if (ctx->Const.GLSLVersion >= 460)
745 GLSL_VERSION("460");
746 if (ctx->Const.GLSLVersion >= 450)
747 GLSL_VERSION("450");
748 if (ctx->Const.GLSLVersion >= 440)
749 GLSL_VERSION("440");
750 if (ctx->Const.GLSLVersion >= 430)
751 GLSL_VERSION("430");
752 if (ctx->Const.GLSLVersion >= 420)
753 GLSL_VERSION("420");
754 if (ctx->Const.GLSLVersion >= 410)
755 GLSL_VERSION("410");
756 if (ctx->Const.GLSLVersion >= 400)
757 GLSL_VERSION("400");
758 if (ctx->Const.GLSLVersion >= 330)
759 GLSL_VERSION("330");
760 if (ctx->Const.GLSLVersion >= 150)
761 GLSL_VERSION("150");
762 if (ctx->Const.GLSLVersion >= 140)
763 GLSL_VERSION("140");
764 if (ctx->Const.GLSLVersion >= 130)
765 GLSL_VERSION("130");
766 if (ctx->Const.GLSLVersion >= 120)
767 GLSL_VERSION("120");
768 /* The GL spec says to return the empty string for GLSL 1.10 */
769 if (ctx->Const.GLSLVersion >= 110)
770 GLSL_VERSION("");
771
772 /* GLSL es */
773 if (_mesa_is_gles32(ctx) || ctx->Extensions.ARB_ES3_2_compatibility)
774 GLSL_VERSION("320 es");
775 if (_mesa_is_gles31(ctx) || ctx->Extensions.ARB_ES3_1_compatibility)
776 GLSL_VERSION("310 es");
777 if (_mesa_is_gles3(ctx) || ctx->Extensions.ARB_ES3_compatibility)
778 GLSL_VERSION("300 es");
779 if (_mesa_is_gles2(ctx) || ctx->Extensions.ARB_ES2_compatibility)
780 GLSL_VERSION("100");
781
782 #undef GLSL_VERSION
783
784 return n;
785 }
786