1 /*
2 * (C) Copyright IBM Corporation 2002, 2004
3 * All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * on the rights to use, copy, modify, merge, publish, distribute, sub
9 * license, and/or sell copies of the Software, and to permit persons to whom
10 * the Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
14 * Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
22 * USE OR OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25 /**
26 * \file dri_util.c
27 * DRI utility functions.
28 *
29 * This module acts as glue between GLX and the actual hardware driver. A DRI
30 * driver doesn't really \e have to use any of this - it's optional. But, some
31 * useful stuff is done here that otherwise would have to be duplicated in most
32 * drivers.
33 *
34 * Basically, these utility functions take care of some of the dirty details of
35 * screen initialization, context creation, context binding, DRM setup, etc.
36 *
37 * These functions are compiled into each DRI driver so libGL.so knows nothing
38 * about them.
39 */
40
41
42 #include <stdbool.h>
43 #include "dri_util.h"
44 #include "dri_context.h"
45 #include "dri_screen.h"
46 #include "dri_drawable.h"
47 #include "util/u_endian.h"
48 #include "util/u_memory.h"
49 #include "util/driconf.h"
50 #include "main/framebuffer.h"
51 #include "main/version.h"
52 #include "main/debug_output.h"
53 #include "main/errors.h"
54 #include "loader/loader.h"
55 #include "mesa_interface.h"
56 #include "loader_dri_helper.h"
57 #include "pipe-loader/pipe_loader.h"
58 #include "pipe/p_screen.h"
59
60 driOptionDescription __dri2ConfigOptions[] = {
61 DRI_CONF_SECTION_DEBUG
62 DRI_CONF_GLX_EXTENSION_OVERRIDE()
63 DRI_CONF_INDIRECT_GL_EXTENSION_OVERRIDE()
64 DRI_CONF_SECTION_END
65
66 DRI_CONF_SECTION_PERFORMANCE
67 DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_DEF_INTERVAL_1)
68 DRI_CONF_BLOCK_ON_DEPLETED_BUFFERS(false)
69 DRI_CONF_SECTION_END
70 };
71
72 /*****************************************************************/
73 /** \name Screen handling functions */
74 /*****************************************************************/
75 /*@{*/
76
77 static void
setupLoaderExtensions(struct dri_screen * screen,const __DRIextension ** extensions)78 setupLoaderExtensions(struct dri_screen *screen,
79 const __DRIextension **extensions)
80 {
81 static const struct dri_extension_match matches[] = {
82 {__DRI_DRI2_LOADER, 1, offsetof(struct dri_screen, dri2.loader), true},
83 {__DRI_IMAGE_LOOKUP, 1, offsetof(struct dri_screen, dri2.image), true},
84 {__DRI_USE_INVALIDATE, 1, offsetof(struct dri_screen, dri2.useInvalidate), true},
85 {__DRI_BACKGROUND_CALLABLE, 1, offsetof(struct dri_screen, dri2.backgroundCallable), true},
86 {__DRI_SWRAST_LOADER, 1, offsetof(struct dri_screen, swrast_loader), true},
87 {__DRI_IMAGE_LOADER, 1, offsetof(struct dri_screen, image.loader), true},
88 {__DRI_MUTABLE_RENDER_BUFFER_LOADER, 1, offsetof(struct dri_screen, mutableRenderBuffer.loader), true},
89 {__DRI_KOPPER_LOADER, 1, offsetof(struct dri_screen, kopper_loader), true},
90 };
91 loader_bind_extensions(screen, matches, ARRAY_SIZE(matches), extensions);
92 }
93
94 /**
95 * This is the first entrypoint in the driver called by the DRI driver loader
96 * after dlopen()ing it.
97 *
98 * It's used to create global state for the driver across contexts on the same
99 * Display.
100 */
101 __DRIscreen *
driCreateNewScreen3(int scrn,int fd,const __DRIextension ** loader_extensions,enum dri_screen_type type,const __DRIconfig *** driver_configs,bool driver_name_is_inferred,bool has_multibuffer,void * data)102 driCreateNewScreen3(int scrn, int fd,
103 const __DRIextension **loader_extensions,
104 enum dri_screen_type type,
105 const __DRIconfig ***driver_configs, bool driver_name_is_inferred,
106 bool has_multibuffer, void *data)
107 {
108 struct dri_screen *screen;
109
110 screen = CALLOC_STRUCT(dri_screen);
111 if (!screen)
112 return NULL;
113
114 setupLoaderExtensions(screen, loader_extensions);
115 // dri2 drivers require working invalidate
116 if (fd != -1 && !screen->dri2.useInvalidate) {
117 free(screen);
118 return NULL;
119 }
120
121 screen->loaderPrivate = data;
122
123 screen->fd = fd;
124 screen->myNum = scrn;
125 screen->type = type;
126
127 /* Option parsing before ->InitScreen(), as some options apply there. */
128 driParseOptionInfo(&screen->optionInfo,
129 __dri2ConfigOptions, ARRAY_SIZE(__dri2ConfigOptions));
130 driParseConfigFiles(&screen->optionCache, &screen->optionInfo, screen->myNum,
131 "dri2", NULL, NULL, NULL, 0, NULL, 0);
132
133 (void) mtx_init(&screen->opencl_func_mutex, mtx_plain);
134
135 struct pipe_screen *pscreen = NULL;
136 switch (type) {
137 case DRI_SCREEN_DRI3:
138 pscreen = dri2_init_screen(screen, driver_name_is_inferred);
139 break;
140 case DRI_SCREEN_KOPPER:
141 pscreen = kopper_init_screen(screen, driver_name_is_inferred);
142 break;
143 case DRI_SCREEN_SWRAST:
144 pscreen = drisw_init_screen(screen, driver_name_is_inferred);
145 break;
146 case DRI_SCREEN_KMS_SWRAST:
147 pscreen = dri_swrast_kms_init_screen(screen, driver_name_is_inferred);
148 break;
149 default:
150 unreachable("unknown dri screen type");
151 }
152 if (pscreen == NULL) {
153 dri_destroy_screen(screen);
154 return NULL;
155 }
156 *driver_configs = dri_init_screen(screen, pscreen, has_multibuffer);
157 if (*driver_configs == NULL) {
158 dri_destroy_screen(screen);
159 return NULL;
160 }
161
162 struct gl_constants consts = { 0 };
163 gl_api api;
164 unsigned version;
165
166 api = API_OPENGLES2;
167 if (_mesa_override_gl_version_contextless(&consts, &api, &version))
168 screen->max_gl_es2_version = version;
169
170 api = API_OPENGL_COMPAT;
171 if (_mesa_override_gl_version_contextless(&consts, &api, &version)) {
172 screen->max_gl_core_version = version;
173 if (api == API_OPENGL_COMPAT)
174 screen->max_gl_compat_version = version;
175 }
176
177 screen->api_mask = 0;
178 if (screen->max_gl_compat_version > 0)
179 screen->api_mask |= (1 << __DRI_API_OPENGL);
180 if (screen->max_gl_core_version > 0)
181 screen->api_mask |= (1 << __DRI_API_OPENGL_CORE);
182 if (screen->max_gl_es1_version > 0)
183 screen->api_mask |= (1 << __DRI_API_GLES);
184 if (screen->max_gl_es2_version > 0)
185 screen->api_mask |= (1 << __DRI_API_GLES2);
186 if (screen->max_gl_es2_version >= 30)
187 screen->api_mask |= (1 << __DRI_API_GLES3);
188
189 return opaque_dri_screen(screen);
190 }
191
192 /**
193 * Destroy the per-screen private information.
194 *
195 * \internal
196 * This function calls __DriverAPIRec::DestroyScreen on \p screenPrivate, calls
197 * drmClose(), and finally frees \p screenPrivate.
198 */
driDestroyScreen(__DRIscreen * psp)199 void driDestroyScreen(__DRIscreen *psp)
200 {
201 if (psp) {
202 /* No interaction with the X-server is possible at this point. This
203 * routine is called after XCloseDisplay, so there is no protocol
204 * stream open to the X-server anymore.
205 */
206
207 dri_destroy_screen(dri_screen(psp));
208 }
209 }
210
211 /*@}*/
212
213 /* WARNING: HACK: Local defines to avoid pulling glx.h.
214 */
215 #define GLX_NONE 0x8000
216 #define GLX_DONT_CARE 0xFFFFFFFF
217
218 #define SIMPLE_CASE(attrib, field) case attrib: *value = config->modes.field; break
219
220 /**
221 * Return the value of a configuration attribute. The attribute is
222 * indicated by the index.
223 */
224 static int
driGetConfigAttribIndex(const __DRIconfig * config,unsigned int index,unsigned int * value)225 driGetConfigAttribIndex(const __DRIconfig *config,
226 unsigned int index, unsigned int *value)
227 {
228 switch (index + 1) {
229 SIMPLE_CASE(__DRI_ATTRIB_BUFFER_SIZE, rgbBits);
230 SIMPLE_CASE(__DRI_ATTRIB_RED_SIZE, redBits);
231 SIMPLE_CASE(__DRI_ATTRIB_GREEN_SIZE, greenBits);
232 SIMPLE_CASE(__DRI_ATTRIB_BLUE_SIZE, blueBits);
233 case __DRI_ATTRIB_LEVEL:
234 case __DRI_ATTRIB_LUMINANCE_SIZE:
235 case __DRI_ATTRIB_AUX_BUFFERS:
236 *value = 0;
237 break;
238 SIMPLE_CASE(__DRI_ATTRIB_ALPHA_SIZE, alphaBits);
239 case __DRI_ATTRIB_ALPHA_MASK_SIZE:
240 /* I have no idea what this value was ever meant to mean, it's
241 * never been set to anything, just say 0.
242 */
243 *value = 0;
244 break;
245 SIMPLE_CASE(__DRI_ATTRIB_DEPTH_SIZE, depthBits);
246 SIMPLE_CASE(__DRI_ATTRIB_STENCIL_SIZE, stencilBits);
247 SIMPLE_CASE(__DRI_ATTRIB_ACCUM_RED_SIZE, accumRedBits);
248 SIMPLE_CASE(__DRI_ATTRIB_ACCUM_GREEN_SIZE, accumGreenBits);
249 SIMPLE_CASE(__DRI_ATTRIB_ACCUM_BLUE_SIZE, accumBlueBits);
250 SIMPLE_CASE(__DRI_ATTRIB_ACCUM_ALPHA_SIZE, accumAlphaBits);
251 case __DRI_ATTRIB_SAMPLE_BUFFERS:
252 *value = !!config->modes.samples;
253 break;
254 SIMPLE_CASE(__DRI_ATTRIB_SAMPLES, samples);
255 case __DRI_ATTRIB_RENDER_TYPE:
256 /* no support for color index mode */
257 *value = __DRI_ATTRIB_RGBA_BIT;
258 if (config->modes.floatMode)
259 *value |= __DRI_ATTRIB_FLOAT_BIT;
260 break;
261 case __DRI_ATTRIB_CONFIG_CAVEAT:
262 if (config->modes.accumRedBits != 0)
263 *value = __DRI_ATTRIB_SLOW_BIT;
264 else
265 *value = 0;
266 break;
267 case __DRI_ATTRIB_CONFORMANT:
268 *value = GL_TRUE;
269 break;
270 SIMPLE_CASE(__DRI_ATTRIB_DOUBLE_BUFFER, doubleBufferMode);
271 SIMPLE_CASE(__DRI_ATTRIB_STEREO, stereoMode);
272 case __DRI_ATTRIB_TRANSPARENT_TYPE:
273 case __DRI_ATTRIB_TRANSPARENT_INDEX_VALUE: /* horrible bc hack */
274 *value = GLX_NONE;
275 break;
276 case __DRI_ATTRIB_TRANSPARENT_RED_VALUE:
277 case __DRI_ATTRIB_TRANSPARENT_GREEN_VALUE:
278 case __DRI_ATTRIB_TRANSPARENT_BLUE_VALUE:
279 case __DRI_ATTRIB_TRANSPARENT_ALPHA_VALUE:
280 *value = GLX_DONT_CARE;
281 break;
282 case __DRI_ATTRIB_FLOAT_MODE:
283 *value = config->modes.floatMode;
284 break;
285 SIMPLE_CASE(__DRI_ATTRIB_RED_MASK, redMask);
286 SIMPLE_CASE(__DRI_ATTRIB_GREEN_MASK, greenMask);
287 SIMPLE_CASE(__DRI_ATTRIB_BLUE_MASK, blueMask);
288 SIMPLE_CASE(__DRI_ATTRIB_ALPHA_MASK, alphaMask);
289 case __DRI_ATTRIB_MAX_PBUFFER_WIDTH:
290 case __DRI_ATTRIB_MAX_PBUFFER_HEIGHT:
291 case __DRI_ATTRIB_MAX_PBUFFER_PIXELS:
292 case __DRI_ATTRIB_OPTIMAL_PBUFFER_WIDTH:
293 case __DRI_ATTRIB_OPTIMAL_PBUFFER_HEIGHT:
294 case __DRI_ATTRIB_VISUAL_SELECT_GROUP:
295 *value = 0;
296 break;
297 case __DRI_ATTRIB_SWAP_METHOD:
298 /* Not supported any more, but we have the __DRI_ATTRIB still defined
299 * for the X server's sake, and EGL will expect us to handle it because
300 * it iterates all __DRI_ATTRIBs.
301 */
302 *value = __DRI_ATTRIB_SWAP_UNDEFINED;
303 break;
304 case __DRI_ATTRIB_MAX_SWAP_INTERVAL:
305 *value = INT_MAX;
306 break;
307 case __DRI_ATTRIB_MIN_SWAP_INTERVAL:
308 *value = 0;
309 break;
310 case __DRI_ATTRIB_BIND_TO_TEXTURE_RGB:
311 case __DRI_ATTRIB_BIND_TO_TEXTURE_RGBA:
312 case __DRI_ATTRIB_YINVERTED:
313 *value = GL_TRUE;
314 break;
315 case __DRI_ATTRIB_BIND_TO_MIPMAP_TEXTURE:
316 *value = GL_FALSE;
317 break;
318 case __DRI_ATTRIB_BIND_TO_TEXTURE_TARGETS:
319 *value = __DRI_ATTRIB_TEXTURE_1D_BIT |
320 __DRI_ATTRIB_TEXTURE_2D_BIT |
321 __DRI_ATTRIB_TEXTURE_RECTANGLE_BIT;
322 break;
323 SIMPLE_CASE(__DRI_ATTRIB_FRAMEBUFFER_SRGB_CAPABLE, sRGBCapable);
324 case __DRI_ATTRIB_MUTABLE_RENDER_BUFFER:
325 *value = GL_FALSE;
326 break;
327 SIMPLE_CASE(__DRI_ATTRIB_RED_SHIFT, redShift);
328 SIMPLE_CASE(__DRI_ATTRIB_GREEN_SHIFT, greenShift);
329 SIMPLE_CASE(__DRI_ATTRIB_BLUE_SHIFT, blueShift);
330 SIMPLE_CASE(__DRI_ATTRIB_ALPHA_SHIFT, alphaShift);
331 default:
332 /* XXX log an error or smth */
333 return GL_FALSE;
334 }
335
336 return GL_TRUE;
337 }
338
339 /**
340 * Get the value of a configuration attribute.
341 * \param attrib the attribute (one of the _DRI_ATTRIB_x tokens)
342 * \param value returns the attribute's value
343 * \return 1 for success, 0 for failure
344 */
345 int
driGetConfigAttrib(const __DRIconfig * config,unsigned int attrib,unsigned int * value)346 driGetConfigAttrib(const __DRIconfig *config,
347 unsigned int attrib, unsigned int *value)
348 {
349 return driGetConfigAttribIndex(config, attrib - 1, value);
350 }
351
352 /**
353 * Get a configuration attribute name and value, given an index.
354 * \param index which field of the __DRIconfig to query
355 * \param attrib returns the attribute name (one of the _DRI_ATTRIB_x tokens)
356 * \param value returns the attribute's value
357 * \return 1 for success, 0 for failure
358 */
359 int
driIndexConfigAttrib(const __DRIconfig * config,int index,unsigned int * attrib,unsigned int * value)360 driIndexConfigAttrib(const __DRIconfig *config, int index,
361 unsigned int *attrib, unsigned int *value)
362 {
363 if (driGetConfigAttribIndex(config, index, value)) {
364 *attrib = index + 1;
365 return GL_TRUE;
366 }
367
368 return GL_FALSE;
369 }
370
371 static int
validate_context_version(struct dri_screen * screen,int mesa_api,unsigned major_version,unsigned minor_version)372 validate_context_version(struct dri_screen *screen,
373 int mesa_api,
374 unsigned major_version,
375 unsigned minor_version)
376 {
377 unsigned req_version = 10 * major_version + minor_version;
378 unsigned max_version = 0;
379
380 if (major_version == 0 || major_version > 4)
381 return __DRI_CTX_ERROR_BAD_API;
382
383 if (mesa_api == API_OPENGL_COMPAT) {
384 if ((major_version == 4 && minor_version > 6) ||
385 (major_version == 3 && minor_version > 3) ||
386 (major_version == 2 && minor_version > 1) ||
387 (major_version == 1 && minor_version > 5))
388 return __DRI_CTX_ERROR_BAD_API;
389 max_version = screen->max_gl_compat_version;
390 } else if (mesa_api == API_OPENGLES) {
391 if (major_version > 1 || minor_version > 1)
392 return __DRI_CTX_ERROR_BAD_API;
393 max_version = screen->max_gl_es1_version;
394 } else if (mesa_api == API_OPENGLES2) {
395 if ((major_version > 3) ||
396 (major_version == 3 && minor_version > 2) ||
397 (major_version == 2 && minor_version > 0) ||
398 (major_version < 2))
399 return __DRI_CTX_ERROR_BAD_API;
400 max_version = screen->max_gl_es2_version;
401 } else if (mesa_api == API_OPENGL_CORE) {
402 if ((major_version == 4 && minor_version > 6) ||
403 (major_version == 3 && minor_version > 3) ||
404 (major_version < 3))
405 return __DRI_CTX_ERROR_BAD_API;
406 max_version = screen->max_gl_core_version;
407 } else {
408 return __DRI_CTX_ERROR_BAD_API;
409 }
410
411 if (max_version == 0)
412 return __DRI_CTX_ERROR_BAD_VERSION;
413
414 if (req_version > max_version)
415 return __DRI_CTX_ERROR_BAD_VERSION;
416
417 return __DRI_CTX_ERROR_SUCCESS;
418 }
419
420 /*****************************************************************/
421 /** \name Context handling functions */
422 /*****************************************************************/
423 /*@{*/
424
425 __DRIcontext *
driCreateContextAttribs(__DRIscreen * psp,int api,const __DRIconfig * config,__DRIcontext * shared,unsigned num_attribs,const uint32_t * attribs,unsigned * error,void * data)426 driCreateContextAttribs(__DRIscreen *psp, int api,
427 const __DRIconfig *config,
428 __DRIcontext *shared,
429 unsigned num_attribs,
430 const uint32_t *attribs,
431 unsigned *error,
432 void *data)
433 {
434 struct dri_screen *screen = dri_screen(psp);
435 const struct gl_config *modes = (config != NULL) ? &config->modes : NULL;
436 gl_api mesa_api;
437 struct __DriverContextConfig ctx_config;
438
439 ctx_config.major_version = 1;
440 ctx_config.minor_version = 0;
441 ctx_config.flags = 0;
442 ctx_config.attribute_mask = 0;
443 ctx_config.priority = __DRI_CTX_PRIORITY_MEDIUM;
444
445 assert((num_attribs == 0) || (attribs != NULL));
446
447 switch (api) {
448 case __DRI_API_OPENGL:
449 mesa_api = API_OPENGL_COMPAT;
450 break;
451 case __DRI_API_GLES:
452 mesa_api = API_OPENGLES;
453 break;
454 case __DRI_API_GLES2:
455 case __DRI_API_GLES3:
456 mesa_api = API_OPENGLES2;
457 break;
458 case __DRI_API_OPENGL_CORE:
459 mesa_api = API_OPENGL_CORE;
460 break;
461 default:
462 *error = __DRI_CTX_ERROR_BAD_API;
463 return NULL;
464 }
465
466 for (unsigned i = 0; i < num_attribs; i++) {
467 switch (attribs[i * 2]) {
468 case __DRI_CTX_ATTRIB_MAJOR_VERSION:
469 ctx_config.major_version = attribs[i * 2 + 1];
470 break;
471 case __DRI_CTX_ATTRIB_MINOR_VERSION:
472 ctx_config.minor_version = attribs[i * 2 + 1];
473 break;
474 case __DRI_CTX_ATTRIB_FLAGS:
475 ctx_config.flags = attribs[i * 2 + 1];
476 break;
477 case __DRI_CTX_ATTRIB_RESET_STRATEGY:
478 if (attribs[i * 2 + 1] != __DRI_CTX_RESET_NO_NOTIFICATION) {
479 ctx_config.attribute_mask |=
480 __DRIVER_CONTEXT_ATTRIB_RESET_STRATEGY;
481 ctx_config.reset_strategy = attribs[i * 2 + 1];
482 } else {
483 ctx_config.attribute_mask &=
484 ~__DRIVER_CONTEXT_ATTRIB_RESET_STRATEGY;
485 }
486 break;
487 case __DRI_CTX_ATTRIB_PRIORITY:
488 ctx_config.attribute_mask |= __DRIVER_CONTEXT_ATTRIB_PRIORITY;
489 ctx_config.priority = attribs[i * 2 + 1];
490 break;
491 case __DRI_CTX_ATTRIB_RELEASE_BEHAVIOR:
492 if (attribs[i * 2 + 1] != __DRI_CTX_RELEASE_BEHAVIOR_FLUSH) {
493 ctx_config.attribute_mask |=
494 __DRIVER_CONTEXT_ATTRIB_RELEASE_BEHAVIOR;
495 ctx_config.release_behavior = attribs[i * 2 + 1];
496 } else {
497 ctx_config.attribute_mask &=
498 ~__DRIVER_CONTEXT_ATTRIB_RELEASE_BEHAVIOR;
499 }
500 break;
501 case __DRI_CTX_ATTRIB_NO_ERROR:
502 if (attribs[i * 2 + 1] != 0) {
503 ctx_config.attribute_mask |=
504 __DRIVER_CONTEXT_ATTRIB_NO_ERROR;
505 ctx_config.no_error = attribs[i * 2 + 1];
506 } else {
507 ctx_config.attribute_mask &=
508 ~__DRIVER_CONTEXT_ATTRIB_NO_ERROR;
509 }
510 break;
511 case __DRI_CTX_ATTRIB_PROTECTED:
512 if (attribs[i * 2 + 1]) {
513 ctx_config.attribute_mask |= __DRIVER_CONTEXT_ATTRIB_PROTECTED;
514 } else {
515 ctx_config.attribute_mask &= ~__DRIVER_CONTEXT_ATTRIB_PROTECTED;
516 }
517 break;
518 default:
519 /* We can't create a context that satisfies the requirements of an
520 * attribute that we don't understand. Return failure.
521 */
522 assert(!"Should not get here.");
523 *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
524 return NULL;
525 }
526 }
527
528 /* The specific Mesa driver may not support the GL_ARB_compatibilty
529 * extension or the compatibility profile. In that case, we treat an
530 * API_OPENGL_COMPAT 3.1 as API_OPENGL_CORE. We reject API_OPENGL_COMPAT
531 * 3.2+ in any case.
532 */
533 if (mesa_api == API_OPENGL_COMPAT &&
534 ctx_config.major_version == 3 && ctx_config.minor_version == 1 &&
535 screen->max_gl_compat_version < 31)
536 mesa_api = API_OPENGL_CORE;
537
538 /* The latest version of EGL_KHR_create_context spec says:
539 *
540 * "If the EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR flag bit is set in
541 * EGL_CONTEXT_FLAGS_KHR, then a <debug context> will be created.
542 * [...] This bit is supported for OpenGL and OpenGL ES contexts.
543 *
544 * No other EGL_CONTEXT_OPENGL_*_BIT is legal for an ES context.
545 *
546 * However, Mesa's EGL layer translates the context attribute
547 * EGL_CONTEXT_OPENGL_ROBUST_ACCESS into the context flag
548 * __DRI_CTX_FLAG_ROBUST_BUFFER_ACCESS. That attribute is legal for ES
549 * (with EGL 1.5 or EGL_EXT_create_context_robustness) and GL (only with
550 * EGL 1.5).
551 *
552 * From the EGL_EXT_create_context_robustness spec:
553 *
554 * This extension is written against the OpenGL ES 2.0 Specification
555 * but can apply to OpenGL ES 1.1 and up.
556 *
557 * From the EGL 1.5 (2014.08.27) spec, p55:
558 *
559 * If the EGL_CONTEXT_OPENGL_ROBUST_ACCESS attribute is set to
560 * EGL_TRUE, a context supporting robust buffer access will be created.
561 * OpenGL contexts must support the GL_ARB_robustness extension, or
562 * equivalent core API functional- ity. OpenGL ES contexts must support
563 * the GL_EXT_robustness extension, or equivalent core API
564 * functionality.
565 */
566 if (mesa_api != API_OPENGL_COMPAT
567 && mesa_api != API_OPENGL_CORE
568 && (ctx_config.flags & ~(__DRI_CTX_FLAG_DEBUG |
569 __DRI_CTX_FLAG_ROBUST_BUFFER_ACCESS))) {
570 *error = __DRI_CTX_ERROR_BAD_FLAG;
571 return NULL;
572 }
573
574 /* There are no forward-compatible contexts before OpenGL 3.0. The
575 * GLX_ARB_create_context spec says:
576 *
577 * "Forward-compatible contexts are defined only for OpenGL versions
578 * 3.0 and later."
579 *
580 * Forward-looking contexts are supported by silently converting the
581 * requested API to API_OPENGL_CORE.
582 *
583 * In Mesa, a debug context is the same as a regular context.
584 */
585 if ((ctx_config.flags & __DRI_CTX_FLAG_FORWARD_COMPATIBLE) != 0) {
586 mesa_api = API_OPENGL_CORE;
587 }
588
589 const uint32_t allowed_flags = (__DRI_CTX_FLAG_DEBUG
590 | __DRI_CTX_FLAG_FORWARD_COMPATIBLE
591 | __DRI_CTX_FLAG_ROBUST_BUFFER_ACCESS
592 | __DRI_CTX_FLAG_RESET_ISOLATION);
593 if (ctx_config.flags & ~allowed_flags) {
594 *error = __DRI_CTX_ERROR_UNKNOWN_FLAG;
595 return NULL;
596 }
597
598 *error = validate_context_version(screen, mesa_api,
599 ctx_config.major_version,
600 ctx_config.minor_version);
601 if (*error != __DRI_CTX_ERROR_SUCCESS)
602 return NULL;
603
604 struct dri_context *ctx = dri_create_context(screen, mesa_api,
605 modes, &ctx_config, error,
606 dri_context(shared),
607 data);
608 return opaque_dri_context(ctx);
609 }
610
611 static __DRIcontext *
driCreateNewContextForAPI(__DRIscreen * screen,int api,const __DRIconfig * config,__DRIcontext * shared,void * data)612 driCreateNewContextForAPI(__DRIscreen *screen, int api,
613 const __DRIconfig *config,
614 __DRIcontext *shared, void *data)
615 {
616 unsigned error;
617
618 return driCreateContextAttribs(screen, api, config, shared, 0, NULL,
619 &error, data);
620 }
621
622 __DRIcontext *
driCreateNewContext(__DRIscreen * screen,const __DRIconfig * config,__DRIcontext * shared,void * data)623 driCreateNewContext(__DRIscreen *screen, const __DRIconfig *config,
624 __DRIcontext *shared, void *data)
625 {
626 return driCreateNewContextForAPI(screen, __DRI_API_OPENGL,
627 config, shared, data);
628 }
629
630 /**
631 * Destroy the per-context private information.
632 *
633 * \internal
634 * This function calls __DriverAPIRec::DestroyContext on \p contextPrivate, calls
635 * drmDestroyContext(), and finally frees \p contextPrivate.
636 */
637 void
driDestroyContext(__DRIcontext * pcp)638 driDestroyContext(__DRIcontext *pcp)
639 {
640 if (pcp)
641 dri_destroy_context(dri_context(pcp));
642 }
643
644 int
driCopyContext(__DRIcontext * dest,__DRIcontext * src,unsigned long mask)645 driCopyContext(__DRIcontext *dest, __DRIcontext *src, unsigned long mask)
646 {
647 (void) dest;
648 (void) src;
649 (void) mask;
650 return GL_FALSE;
651 }
652
653 /*@}*/
654
655
656 /*****************************************************************/
657 /** \name Context (un)binding functions */
658 /*****************************************************************/
659 /*@{*/
660
661 /**
662 * This function takes both a read buffer and a draw buffer. This is needed
663 * for \c glXMakeCurrentReadSGI or GLX 1.3's \c glXMakeContextCurrent
664 * function.
665 */
driBindContext(__DRIcontext * pcp,__DRIdrawable * pdp,__DRIdrawable * prp)666 int driBindContext(__DRIcontext *pcp,
667 __DRIdrawable *pdp,
668 __DRIdrawable *prp)
669 {
670 /*
671 ** Assume error checking is done properly in glXMakeCurrent before
672 ** calling driBindContext.
673 */
674
675 if (!pcp)
676 return GL_FALSE;
677
678 return dri_make_current(dri_context(pcp), dri_drawable(pdp),
679 dri_drawable(prp));
680 }
681
682 /**
683 * Unbind context.
684 *
685 * \param scrn the screen.
686 * \param gc context.
687 *
688 * \return \c GL_TRUE on success, or \c GL_FALSE on failure.
689 *
690 * \internal
691 * This function calls __DriverAPIRec::UnbindContext, and then decrements
692 * dri_drawable::refcount which must be non-zero for a successful
693 * return.
694 *
695 * While casting the opaque private pointers associated with the parameters
696 * into their respective real types it also assures they are not \c NULL.
697 */
driUnbindContext(__DRIcontext * pcp)698 int driUnbindContext(__DRIcontext *pcp)
699 {
700 /*
701 ** Assume error checking is done properly in glXMakeCurrent before
702 ** calling driUnbindContext.
703 */
704
705 if (pcp == NULL)
706 return GL_FALSE;
707
708 /*
709 ** Call dri_unbind_context before checking for valid drawables
710 ** to handle surfaceless contexts properly.
711 */
712 return dri_unbind_context(dri_context(pcp));
713 }
714
715 /*@}*/
716
717 void
driDestroyDrawable(__DRIdrawable * pdp)718 driDestroyDrawable(__DRIdrawable *pdp)
719 {
720 dri_put_drawable(dri_drawable(pdp));
721 }
722
723 static int
dri2ConfigQueryb(__DRIscreen * psp,const char * var,unsigned char * val)724 dri2ConfigQueryb(__DRIscreen *psp, const char *var, unsigned char *val)
725 {
726 struct dri_screen *screen = dri_screen(psp);
727
728 if (!driCheckOption(&screen->optionCache, var, DRI_BOOL))
729 return -1;
730
731 *val = driQueryOptionb(&screen->optionCache, var);
732
733 return 0;
734 }
735
736 static int
dri2ConfigQueryi(__DRIscreen * psp,const char * var,int * val)737 dri2ConfigQueryi(__DRIscreen *psp, const char *var, int *val)
738 {
739 struct dri_screen *screen = dri_screen(psp);
740
741 if (!driCheckOption(&screen->optionCache, var, DRI_INT) &&
742 !driCheckOption(&screen->optionCache, var, DRI_ENUM))
743 return -1;
744
745 *val = driQueryOptioni(&screen->optionCache, var);
746
747 return 0;
748 }
749
750 static int
dri2ConfigQueryf(__DRIscreen * psp,const char * var,float * val)751 dri2ConfigQueryf(__DRIscreen *psp, const char *var, float *val)
752 {
753 struct dri_screen *screen = dri_screen(psp);
754
755 if (!driCheckOption(&screen->optionCache, var, DRI_FLOAT))
756 return -1;
757
758 *val = driQueryOptionf(&screen->optionCache, var);
759
760 return 0;
761 }
762
763 static int
dri2ConfigQuerys(__DRIscreen * psp,const char * var,char ** val)764 dri2ConfigQuerys(__DRIscreen *psp, const char *var, char **val)
765 {
766 struct dri_screen *screen = dri_screen(psp);
767
768 if (!driCheckOption(&screen->optionCache, var, DRI_STRING))
769 return -1;
770
771 *val = driQueryOptionstr(&screen->optionCache, var);
772
773 return 0;
774 }
775
776
777 /**
778 * \brief the DRI2ConfigQueryExtension configQueryb method
779 */
780 int
dri2GalliumConfigQueryb(__DRIscreen * sPriv,const char * var,unsigned char * val)781 dri2GalliumConfigQueryb(__DRIscreen *sPriv, const char *var,
782 unsigned char *val)
783 {
784 struct dri_screen *screen = dri_screen(sPriv);
785
786 if (!driCheckOption(&screen->dev->option_cache, var, DRI_BOOL))
787 return dri2ConfigQueryb(sPriv, var, val);
788
789 *val = driQueryOptionb(&screen->dev->option_cache, var);
790
791 return 0;
792 }
793
794 /**
795 * \brief the DRI2ConfigQueryExtension configQueryi method
796 */
797 int
dri2GalliumConfigQueryi(__DRIscreen * sPriv,const char * var,int * val)798 dri2GalliumConfigQueryi(__DRIscreen *sPriv, const char *var, int *val)
799 {
800 struct dri_screen *screen = dri_screen(sPriv);
801
802 if (!driCheckOption(&screen->dev->option_cache, var, DRI_INT) &&
803 !driCheckOption(&screen->dev->option_cache, var, DRI_ENUM))
804 return dri2ConfigQueryi(sPriv, var, val);
805
806 *val = driQueryOptioni(&screen->dev->option_cache, var);
807
808 return 0;
809 }
810
811 /**
812 * \brief the DRI2ConfigQueryExtension configQueryf method
813 */
814 int
dri2GalliumConfigQueryf(__DRIscreen * sPriv,const char * var,float * val)815 dri2GalliumConfigQueryf(__DRIscreen *sPriv, const char *var, float *val)
816 {
817 struct dri_screen *screen = dri_screen(sPriv);
818
819 if (!driCheckOption(&screen->dev->option_cache, var, DRI_FLOAT))
820 return dri2ConfigQueryf(sPriv, var, val);
821
822 *val = driQueryOptionf(&screen->dev->option_cache, var);
823
824 return 0;
825 }
826
827 /**
828 * \brief the DRI2ConfigQueryExtension configQuerys method
829 */
830 int
dri2GalliumConfigQuerys(__DRIscreen * sPriv,const char * var,char ** val)831 dri2GalliumConfigQuerys(__DRIscreen *sPriv, const char *var, char **val)
832 {
833 struct dri_screen *screen = dri_screen(sPriv);
834
835 if (!driCheckOption(&screen->dev->option_cache, var, DRI_STRING))
836 return dri2ConfigQuerys(sPriv, var, val);
837
838 *val = driQueryOptionstr(&screen->dev->option_cache, var);
839
840 return 0;
841 }
842
843 /**
844 * \brief the DRI2ConfigQueryExtension struct.
845 *
846 * We first query the driver option cache. Then the dri2 option cache.
847 */
848 const __DRI2configQueryExtension dri2GalliumConfigQueryExtension = {
849 .base = { __DRI2_CONFIG_QUERY, 2 },
850
851 .configQueryb = dri2GalliumConfigQueryb,
852 .configQueryi = dri2GalliumConfigQueryi,
853 .configQueryf = dri2GalliumConfigQueryf,
854 .configQuerys = dri2GalliumConfigQuerys,
855 };
856
857
858 unsigned int
driGetAPIMask(__DRIscreen * screen)859 driGetAPIMask(__DRIscreen *screen)
860 {
861 return dri_screen(screen)->api_mask;
862 }
863
864 /**
865 * swrast swapbuffers entrypoint.
866 *
867 * DRI2 implements this inside the loader with only flushes handled by the
868 * driver.
869 */
870 void
driSwapBuffersWithDamage(__DRIdrawable * pdp,int nrects,const int * rects)871 driSwapBuffersWithDamage(__DRIdrawable *pdp, int nrects, const int *rects)
872 {
873 struct dri_drawable *drawable = dri_drawable(pdp);
874
875 assert(drawable->screen->swrast_loader);
876
877 drawable->swap_buffers_with_damage(drawable, nrects, rects);
878 }
879
880 void
driSwapBuffers(__DRIdrawable * pdp)881 driSwapBuffers(__DRIdrawable *pdp)
882 {
883 struct dri_drawable *drawable = dri_drawable(pdp);
884
885 assert(drawable->screen->swrast_loader);
886
887 drawable->swap_buffers(drawable);
888 }
889
890 int
driSWRastQueryBufferAge(__DRIdrawable * pdp)891 driSWRastQueryBufferAge(__DRIdrawable *pdp)
892 {
893 struct dri_drawable *drawable = dri_drawable(pdp);
894 return drawable->buffer_age;
895 }
896
897 /*
898 * Note: the first match is returned, which is important for formats like
899 * __DRI_IMAGE_FORMAT_R8 which maps to both MESA_FORMAT_{R,L}_UNORM8
900 */
901 static const struct {
902 uint32_t image_format;
903 GLenum internal_format;
904 } format_mapping[] = {
905 {
906 .image_format = __DRI_IMAGE_FORMAT_RGB565,
907 .internal_format = GL_RGB565,
908 },
909 {
910 .image_format = __DRI_IMAGE_FORMAT_ARGB1555,
911 .internal_format = GL_RGB5_A1,
912 },
913 {
914 .image_format = __DRI_IMAGE_FORMAT_ABGR1555,
915 .internal_format = GL_RGB5_A1,
916 },
917 {
918 .image_format = __DRI_IMAGE_FORMAT_XRGB8888,
919 .internal_format = GL_RGB8,
920 },
921 {
922 .image_format = __DRI_IMAGE_FORMAT_ABGR16161616F,
923 .internal_format = GL_RGBA16F,
924 },
925 {
926 .image_format = __DRI_IMAGE_FORMAT_XBGR16161616F,
927 .internal_format = GL_RGB16F,
928 },
929 {
930 .image_format = __DRI_IMAGE_FORMAT_ABGR16161616,
931 .internal_format = GL_RGBA16,
932 },
933 {
934 .image_format = __DRI_IMAGE_FORMAT_XBGR16161616,
935 .internal_format = GL_RGB16,
936 },
937 {
938 .image_format = __DRI_IMAGE_FORMAT_ARGB2101010,
939 .internal_format = GL_RGB10_A2,
940 },
941 {
942 .image_format = __DRI_IMAGE_FORMAT_XRGB2101010,
943 .internal_format = GL_RGB10,
944 },
945 {
946 .image_format = __DRI_IMAGE_FORMAT_ABGR2101010,
947 .internal_format = GL_RGB10_A2,
948 },
949 {
950 .image_format = __DRI_IMAGE_FORMAT_XBGR2101010,
951 .internal_format = GL_RGB10,
952 },
953 {
954 .image_format = __DRI_IMAGE_FORMAT_ARGB8888,
955 .internal_format = GL_RGBA8,
956 },
957 {
958 .image_format = __DRI_IMAGE_FORMAT_ABGR8888,
959 .internal_format = GL_RGBA8,
960 },
961 {
962 .image_format = __DRI_IMAGE_FORMAT_XBGR8888,
963 .internal_format = GL_RGB8,
964 },
965 {
966 .image_format = __DRI_IMAGE_FORMAT_R8,
967 .internal_format = GL_R8,
968 },
969 {
970 .image_format = __DRI_IMAGE_FORMAT_R8,
971 .internal_format = GL_R8,
972 },
973 #if UTIL_ARCH_LITTLE_ENDIAN
974 {
975 .image_format = __DRI_IMAGE_FORMAT_GR88,
976 .internal_format = GL_RG8,
977 },
978 {
979 .image_format = __DRI_IMAGE_FORMAT_GR88,
980 .internal_format = GL_RG8,
981 },
982 #endif
983 {
984 .image_format = __DRI_IMAGE_FORMAT_SABGR8,
985 .internal_format = GL_SRGB8_ALPHA8,
986 },
987 {
988 .image_format = __DRI_IMAGE_FORMAT_SARGB8,
989 .internal_format = GL_SRGB8_ALPHA8,
990 },
991 {
992 .image_format = __DRI_IMAGE_FORMAT_SXRGB8,
993 .internal_format = GL_SRGB8,
994 },
995 {
996 .image_format = __DRI_IMAGE_FORMAT_R16,
997 .internal_format = GL_R16,
998 },
999 {
1000 .image_format = __DRI_IMAGE_FORMAT_R16,
1001 .internal_format = GL_R16,
1002 },
1003 #if UTIL_ARCH_LITTLE_ENDIAN
1004 {
1005 .image_format = __DRI_IMAGE_FORMAT_GR1616,
1006 .internal_format = GL_RG16,
1007 },
1008 {
1009 .image_format = __DRI_IMAGE_FORMAT_GR1616,
1010 .internal_format = GL_RG16,
1011 },
1012 #endif
1013 {
1014 .image_format = __DRI_IMAGE_FORMAT_ARGB4444,
1015 .internal_format = GL_RGBA4,
1016 },
1017 {
1018 .image_format = __DRI_IMAGE_FORMAT_ABGR4444,
1019 .internal_format = GL_RGBA4,
1020 },
1021 };
1022
1023 uint32_t
driImageFormatToSizedInternalGLFormat(uint32_t image_format)1024 driImageFormatToSizedInternalGLFormat(uint32_t image_format)
1025 {
1026 for (size_t i = 0; i < ARRAY_SIZE(format_mapping); i++)
1027 if (format_mapping[i].image_format == image_format)
1028 return format_mapping[i].internal_format;
1029
1030 return GL_NONE;
1031 }
1032
dri_vblank_mode(__DRIscreen * driScreen)1033 static int dri_vblank_mode(__DRIscreen *driScreen)
1034 {
1035 GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
1036
1037 dri2GalliumConfigQueryi(driScreen, "vblank_mode", &vblank_mode);
1038
1039 return vblank_mode;
1040 }
1041
dri_get_initial_swap_interval(__DRIscreen * driScreen)1042 int dri_get_initial_swap_interval(__DRIscreen *driScreen)
1043 {
1044 int vblank_mode = dri_vblank_mode(driScreen);
1045
1046 switch (vblank_mode) {
1047 case DRI_CONF_VBLANK_NEVER:
1048 case DRI_CONF_VBLANK_DEF_INTERVAL_0:
1049 return 0;
1050 case DRI_CONF_VBLANK_DEF_INTERVAL_1:
1051 case DRI_CONF_VBLANK_ALWAYS_SYNC:
1052 default:
1053 return 1;
1054 }
1055 }
1056
dri_valid_swap_interval(__DRIscreen * driScreen,int interval)1057 bool dri_valid_swap_interval(__DRIscreen *driScreen, int interval)
1058 {
1059 int vblank_mode = dri_vblank_mode(driScreen);
1060
1061 switch (vblank_mode) {
1062 case DRI_CONF_VBLANK_NEVER:
1063 if (interval != 0)
1064 return false;
1065 break;
1066 case DRI_CONF_VBLANK_ALWAYS_SYNC:
1067 if (interval <= 0)
1068 return false;
1069 break;
1070 default:
1071 break;
1072 }
1073
1074 return true;
1075 }
1076
1077 struct pipe_screen *
dri_get_pipe_screen(__DRIscreen * driScreen)1078 dri_get_pipe_screen(__DRIscreen *driScreen)
1079 {
1080 struct dri_screen *screen = dri_screen(driScreen);
1081 return screen->base.screen;
1082 }
1083
1084 int
dri_get_screen_param(__DRIscreen * driScreen,enum pipe_cap param)1085 dri_get_screen_param(__DRIscreen *driScreen, enum pipe_cap param)
1086 {
1087 struct pipe_screen *screen = dri_get_pipe_screen(driScreen);
1088 return screen->get_param(screen, param);
1089 }
1090