1/*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 2010 LunarG Inc.
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 OR
17 * 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 OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
23 *
24 * Authors:
25 *    Chia-I Wu <olv@lunarg.com>
26 */
27
28#include "main/mtypes.h"
29#include "main/extensions.h"
30#include "main/context.h"
31#include "main/debug_output.h"
32#include "main/framebuffer.h"
33#include "main/glthread.h"
34#include "main/texobj.h"
35#include "main/teximage.h"
36#include "main/texstate.h"
37#include "main/errors.h"
38#include "main/framebuffer.h"
39#include "main/fbobject.h"
40#include "main/renderbuffer.h"
41#include "main/version.h"
42#include "util/hash_table.h"
43#include "st_texture.h"
44
45#include "st_context.h"
46#include "st_debug.h"
47#include "st_extensions.h"
48#include "st_format.h"
49#include "st_cb_bitmap.h"
50#include "st_cb_flush.h"
51#include "st_manager.h"
52#include "st_sampler_view.h"
53#include "st_util.h"
54
55#include "state_tracker/st_gl_api.h"
56
57#include "pipe/p_context.h"
58#include "pipe/p_screen.h"
59#include "util/format/u_format.h"
60#include "util/u_helpers.h"
61#include "util/u_pointer.h"
62#include "util/u_inlines.h"
63#include "util/u_atomic.h"
64#include "util/u_surface.h"
65#include "util/list.h"
66#include "util/u_memory.h"
67
68struct hash_table;
69struct st_manager_private
70{
71   struct hash_table *stfbi_ht; /* framebuffer iface objects hash table */
72   simple_mtx_t st_mutex;
73};
74
75/**
76 * Cast wrapper to convert a struct gl_framebuffer to an gl_framebuffer.
77 * Return NULL if the struct gl_framebuffer is a user-created framebuffer.
78 * We'll only return non-null for window system framebuffers.
79 * Note that this function may fail.
80 */
81static inline struct gl_framebuffer *
82st_ws_framebuffer(struct gl_framebuffer *fb)
83{
84   /* FBO cannot be casted.  See st_new_framebuffer */
85   if (fb && _mesa_is_winsys_fbo(fb) &&
86       fb != _mesa_get_incomplete_framebuffer())
87      return fb;
88   return NULL;
89}
90
91/**
92 * Map an attachment to a buffer index.
93 */
94static inline gl_buffer_index
95attachment_to_buffer_index(enum st_attachment_type statt)
96{
97   gl_buffer_index index;
98
99   switch (statt) {
100   case ST_ATTACHMENT_FRONT_LEFT:
101      index = BUFFER_FRONT_LEFT;
102      break;
103   case ST_ATTACHMENT_BACK_LEFT:
104      index = BUFFER_BACK_LEFT;
105      break;
106   case ST_ATTACHMENT_FRONT_RIGHT:
107      index = BUFFER_FRONT_RIGHT;
108      break;
109   case ST_ATTACHMENT_BACK_RIGHT:
110      index = BUFFER_BACK_RIGHT;
111      break;
112   case ST_ATTACHMENT_DEPTH_STENCIL:
113      index = BUFFER_DEPTH;
114      break;
115   case ST_ATTACHMENT_ACCUM:
116      index = BUFFER_ACCUM;
117      break;
118   default:
119      index = BUFFER_COUNT;
120      break;
121   }
122
123   return index;
124}
125
126
127/**
128 * Map a buffer index to an attachment.
129 */
130static inline enum st_attachment_type
131buffer_index_to_attachment(gl_buffer_index index)
132{
133   enum st_attachment_type statt;
134
135   switch (index) {
136   case BUFFER_FRONT_LEFT:
137      statt = ST_ATTACHMENT_FRONT_LEFT;
138      break;
139   case BUFFER_BACK_LEFT:
140      statt = ST_ATTACHMENT_BACK_LEFT;
141      break;
142   case BUFFER_FRONT_RIGHT:
143      statt = ST_ATTACHMENT_FRONT_RIGHT;
144      break;
145   case BUFFER_BACK_RIGHT:
146      statt = ST_ATTACHMENT_BACK_RIGHT;
147      break;
148   case BUFFER_DEPTH:
149      statt = ST_ATTACHMENT_DEPTH_STENCIL;
150      break;
151   case BUFFER_ACCUM:
152      statt = ST_ATTACHMENT_ACCUM;
153      break;
154   default:
155      statt = ST_ATTACHMENT_INVALID;
156      break;
157   }
158
159   return statt;
160}
161
162
163/**
164 * Make sure a context picks up the latest cached state of the
165 * drawables it binds to.
166 */
167static void
168st_context_validate(struct st_context *st,
169                    struct gl_framebuffer *stdraw,
170                    struct gl_framebuffer *stread)
171{
172    if (stdraw && stdraw->stamp != st->draw_stamp) {
173       st->dirty |= ST_NEW_FRAMEBUFFER;
174       _mesa_resize_framebuffer(st->ctx, stdraw,
175                                stdraw->Width,
176                                stdraw->Height);
177       st->draw_stamp = stdraw->stamp;
178    }
179
180    if (stread && stread->stamp != st->read_stamp) {
181       if (stread != stdraw) {
182          st->dirty |= ST_NEW_FRAMEBUFFER;
183          _mesa_resize_framebuffer(st->ctx, stread,
184                                   stread->Width,
185                                   stread->Height);
186       }
187       st->read_stamp = stread->stamp;
188    }
189}
190
191
192void
193st_set_ws_renderbuffer_surface(struct gl_renderbuffer *rb,
194                               struct pipe_surface *surf)
195{
196   pipe_surface_reference(&rb->surface_srgb, NULL);
197   pipe_surface_reference(&rb->surface_linear, NULL);
198
199   if (util_format_is_srgb(surf->format))
200      pipe_surface_reference(&rb->surface_srgb, surf);
201   else
202      pipe_surface_reference(&rb->surface_linear, surf);
203
204   rb->surface = surf; /* just assign, don't ref */
205   pipe_resource_reference(&rb->texture, surf->texture);
206
207   rb->Width = surf->width;
208   rb->Height = surf->height;
209}
210
211
212/**
213 * Validate a framebuffer to make sure up-to-date pipe_textures are used.
214 * The context is only used for creating pipe surfaces and for calling
215 * _mesa_resize_framebuffer().
216 * (That should probably be rethought, since those surfaces become
217 * drawable state, not context state, and can be freed by another pipe
218 * context).
219 */
220static void
221st_framebuffer_validate(struct gl_framebuffer *stfb,
222                        struct st_context *st)
223{
224   struct pipe_resource *textures[ST_ATTACHMENT_COUNT];
225   uint width, height;
226   unsigned i;
227   bool changed = false;
228   int32_t new_stamp;
229
230   new_stamp = p_atomic_read(&stfb->iface->stamp);
231   if (stfb->iface_stamp == new_stamp)
232      return;
233
234   memset(textures, 0, stfb->num_statts * sizeof(textures[0]));
235
236   /* validate the fb */
237   do {
238      if (!stfb->iface->validate(&st->iface, stfb->iface, stfb->statts,
239                                 stfb->num_statts, textures))
240         return;
241
242      stfb->iface_stamp = new_stamp;
243      new_stamp = p_atomic_read(&stfb->iface->stamp);
244   } while(stfb->iface_stamp != new_stamp);
245
246   width = stfb->Width;
247   height = stfb->Height;
248
249   for (i = 0; i < stfb->num_statts; i++) {
250      struct gl_renderbuffer *rb;
251      struct pipe_surface *ps, surf_tmpl;
252      gl_buffer_index idx;
253
254      if (!textures[i])
255         continue;
256
257      idx = attachment_to_buffer_index(stfb->statts[i]);
258      if (idx >= BUFFER_COUNT) {
259         pipe_resource_reference(&textures[i], NULL);
260         continue;
261      }
262
263      rb = stfb->Attachment[idx].Renderbuffer;
264      assert(rb);
265      if (rb->texture == textures[i] &&
266          rb->Width == textures[i]->width0 &&
267          rb->Height == textures[i]->height0) {
268         pipe_resource_reference(&textures[i], NULL);
269         continue;
270      }
271
272      u_surface_default_template(&surf_tmpl, textures[i]);
273      ps = st->pipe->create_surface(st->pipe, textures[i], &surf_tmpl);
274      if (ps) {
275         st_set_ws_renderbuffer_surface(rb, ps);
276         pipe_surface_reference(&ps, NULL);
277
278         changed = true;
279
280         width = rb->Width;
281         height = rb->Height;
282      }
283
284      pipe_resource_reference(&textures[i], NULL);
285   }
286
287   if (changed) {
288      ++stfb->stamp;
289      _mesa_resize_framebuffer(st->ctx, stfb, width, height);
290   }
291}
292
293
294/**
295 * Update the attachments to validate by looping the existing renderbuffers.
296 */
297static void
298st_framebuffer_update_attachments(struct gl_framebuffer *stfb)
299{
300   gl_buffer_index idx;
301
302   stfb->num_statts = 0;
303
304   for (enum st_attachment_type i = 0; i < ST_ATTACHMENT_COUNT; i++)
305      stfb->statts[i] = ST_ATTACHMENT_INVALID;
306
307   for (idx = 0; idx < BUFFER_COUNT; idx++) {
308      struct gl_renderbuffer *rb;
309      enum st_attachment_type statt;
310
311      rb = stfb->Attachment[idx].Renderbuffer;
312      if (!rb || rb->software)
313         continue;
314
315      statt = buffer_index_to_attachment(idx);
316      if (statt != ST_ATTACHMENT_INVALID &&
317          st_visual_have_buffers(stfb->iface->visual, 1 << statt))
318         stfb->statts[stfb->num_statts++] = statt;
319   }
320   stfb->stamp++;
321}
322
323/**
324 * Allocate a renderbuffer for an on-screen window (not a user-created
325 * renderbuffer).  The window system code determines the format.
326 */
327static struct gl_renderbuffer *
328st_new_renderbuffer_fb(enum pipe_format format, unsigned samples, boolean sw)
329{
330   struct gl_renderbuffer *rb;
331
332   rb = CALLOC_STRUCT(gl_renderbuffer);
333   if (!rb) {
334      _mesa_error(NULL, GL_OUT_OF_MEMORY, "creating renderbuffer");
335      return NULL;
336   }
337
338   _mesa_init_renderbuffer(rb, 0);
339   rb->ClassID = 0x4242; /* just a unique value */
340   rb->NumSamples = samples;
341   rb->NumStorageSamples = samples;
342   rb->Format = st_pipe_format_to_mesa_format(format);
343   rb->_BaseFormat = _mesa_get_format_base_format(rb->Format);
344   rb->software = sw;
345
346   switch (format) {
347   case PIPE_FORMAT_B10G10R10A2_UNORM:
348   case PIPE_FORMAT_R10G10B10A2_UNORM:
349      rb->InternalFormat = GL_RGB10_A2;
350      break;
351   case PIPE_FORMAT_R10G10B10X2_UNORM:
352   case PIPE_FORMAT_B10G10R10X2_UNORM:
353      rb->InternalFormat = GL_RGB10;
354      break;
355   case PIPE_FORMAT_R8G8B8A8_UNORM:
356   case PIPE_FORMAT_B8G8R8A8_UNORM:
357   case PIPE_FORMAT_A8R8G8B8_UNORM:
358      rb->InternalFormat = GL_RGBA8;
359      break;
360   case PIPE_FORMAT_R8G8B8X8_UNORM:
361   case PIPE_FORMAT_B8G8R8X8_UNORM:
362   case PIPE_FORMAT_X8R8G8B8_UNORM:
363   case PIPE_FORMAT_R8G8B8_UNORM:
364      rb->InternalFormat = GL_RGB8;
365      break;
366   case PIPE_FORMAT_R8G8B8A8_SRGB:
367   case PIPE_FORMAT_B8G8R8A8_SRGB:
368   case PIPE_FORMAT_A8R8G8B8_SRGB:
369      rb->InternalFormat = GL_SRGB8_ALPHA8;
370      break;
371   case PIPE_FORMAT_R8G8B8X8_SRGB:
372   case PIPE_FORMAT_B8G8R8X8_SRGB:
373   case PIPE_FORMAT_X8R8G8B8_SRGB:
374      rb->InternalFormat = GL_SRGB8;
375      break;
376   case PIPE_FORMAT_B5G5R5A1_UNORM:
377      rb->InternalFormat = GL_RGB5_A1;
378      break;
379   case PIPE_FORMAT_B4G4R4A4_UNORM:
380      rb->InternalFormat = GL_RGBA4;
381      break;
382   case PIPE_FORMAT_B5G6R5_UNORM:
383      rb->InternalFormat = GL_RGB565;
384      break;
385   case PIPE_FORMAT_Z16_UNORM:
386      rb->InternalFormat = GL_DEPTH_COMPONENT16;
387      break;
388   case PIPE_FORMAT_Z32_UNORM:
389      rb->InternalFormat = GL_DEPTH_COMPONENT32;
390      break;
391   case PIPE_FORMAT_Z24_UNORM_S8_UINT:
392   case PIPE_FORMAT_S8_UINT_Z24_UNORM:
393      rb->InternalFormat = GL_DEPTH24_STENCIL8_EXT;
394      break;
395   case PIPE_FORMAT_Z24X8_UNORM:
396   case PIPE_FORMAT_X8Z24_UNORM:
397      rb->InternalFormat = GL_DEPTH_COMPONENT24;
398      break;
399   case PIPE_FORMAT_S8_UINT:
400      rb->InternalFormat = GL_STENCIL_INDEX8_EXT;
401      break;
402   case PIPE_FORMAT_R16G16B16A16_SNORM:
403      /* accum buffer */
404      rb->InternalFormat = GL_RGBA16_SNORM;
405      break;
406   case PIPE_FORMAT_R16G16B16A16_UNORM:
407      rb->InternalFormat = GL_RGBA16;
408      break;
409   case PIPE_FORMAT_R16G16B16_UNORM:
410      rb->InternalFormat = GL_RGB16;
411      break;
412   case PIPE_FORMAT_R8_UNORM:
413      rb->InternalFormat = GL_R8;
414      break;
415   case PIPE_FORMAT_R8G8_UNORM:
416      rb->InternalFormat = GL_RG8;
417      break;
418   case PIPE_FORMAT_R16_UNORM:
419      rb->InternalFormat = GL_R16;
420      break;
421   case PIPE_FORMAT_R16G16_UNORM:
422      rb->InternalFormat = GL_RG16;
423      break;
424   case PIPE_FORMAT_R32G32B32A32_FLOAT:
425      rb->InternalFormat = GL_RGBA32F;
426      break;
427   case PIPE_FORMAT_R32G32B32X32_FLOAT:
428   case PIPE_FORMAT_R32G32B32_FLOAT:
429      rb->InternalFormat = GL_RGB32F;
430      break;
431   case PIPE_FORMAT_R16G16B16A16_FLOAT:
432      rb->InternalFormat = GL_RGBA16F;
433      break;
434   case PIPE_FORMAT_R16G16B16X16_FLOAT:
435      rb->InternalFormat = GL_RGB16F;
436      break;
437   default:
438      _mesa_problem(NULL,
439                    "Unexpected format %s in st_new_renderbuffer_fb",
440                    util_format_name(format));
441      FREE(rb);
442      return NULL;
443   }
444
445   rb->surface = NULL;
446
447   return rb;
448}
449
450/**
451 * Add a renderbuffer to the framebuffer.  The framebuffer is one that
452 * corresponds to a window and is not a user-created FBO.
453 */
454static bool
455st_framebuffer_add_renderbuffer(struct gl_framebuffer *stfb,
456                                gl_buffer_index idx, bool prefer_srgb)
457{
458   struct gl_renderbuffer *rb;
459   enum pipe_format format;
460   bool sw;
461
462   assert(_mesa_is_winsys_fbo(stfb));
463
464   /* do not distinguish depth/stencil buffers */
465   if (idx == BUFFER_STENCIL)
466      idx = BUFFER_DEPTH;
467
468   switch (idx) {
469   case BUFFER_DEPTH:
470      format = stfb->iface->visual->depth_stencil_format;
471      sw = false;
472      break;
473   case BUFFER_ACCUM:
474      format = stfb->iface->visual->accum_format;
475      sw = true;
476      break;
477   default:
478      format = stfb->iface->visual->color_format;
479      if (prefer_srgb)
480         format = util_format_srgb(format);
481      sw = false;
482      break;
483   }
484
485   if (format == PIPE_FORMAT_NONE)
486      return false;
487
488   rb = st_new_renderbuffer_fb(format, stfb->iface->visual->samples, sw);
489   if (!rb)
490      return false;
491
492   if (idx != BUFFER_DEPTH) {
493      _mesa_attach_and_own_rb(stfb, idx, rb);
494      return true;
495   }
496
497   bool rb_ownership_taken = false;
498   if (util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_ZS, 0)) {
499      _mesa_attach_and_own_rb(stfb, BUFFER_DEPTH, rb);
500      rb_ownership_taken = true;
501   }
502
503   if (util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_ZS, 1)) {
504      if (rb_ownership_taken)
505         _mesa_attach_and_reference_rb(stfb, BUFFER_STENCIL, rb);
506      else
507         _mesa_attach_and_own_rb(stfb, BUFFER_STENCIL, rb);
508   }
509
510   return true;
511}
512
513
514/**
515 * Intialize a struct gl_config from a visual.
516 */
517static void
518st_visual_to_context_mode(const struct st_visual *visual,
519                          struct gl_config *mode)
520{
521   memset(mode, 0, sizeof(*mode));
522
523   if (st_visual_have_buffers(visual, ST_ATTACHMENT_BACK_LEFT_MASK))
524      mode->doubleBufferMode = GL_TRUE;
525
526   if (st_visual_have_buffers(visual,
527            ST_ATTACHMENT_FRONT_RIGHT_MASK | ST_ATTACHMENT_BACK_RIGHT_MASK))
528      mode->stereoMode = GL_TRUE;
529
530   if (visual->color_format != PIPE_FORMAT_NONE) {
531      mode->redBits =
532         util_format_get_component_bits(visual->color_format,
533               UTIL_FORMAT_COLORSPACE_RGB, 0);
534      mode->greenBits =
535         util_format_get_component_bits(visual->color_format,
536               UTIL_FORMAT_COLORSPACE_RGB, 1);
537      mode->blueBits =
538         util_format_get_component_bits(visual->color_format,
539               UTIL_FORMAT_COLORSPACE_RGB, 2);
540      mode->alphaBits =
541         util_format_get_component_bits(visual->color_format,
542               UTIL_FORMAT_COLORSPACE_RGB, 3);
543
544      mode->rgbBits = mode->redBits +
545         mode->greenBits + mode->blueBits + mode->alphaBits;
546      mode->sRGBCapable = util_format_is_srgb(visual->color_format);
547   }
548
549   if (visual->depth_stencil_format != PIPE_FORMAT_NONE) {
550      mode->depthBits =
551         util_format_get_component_bits(visual->depth_stencil_format,
552               UTIL_FORMAT_COLORSPACE_ZS, 0);
553      mode->stencilBits =
554         util_format_get_component_bits(visual->depth_stencil_format,
555               UTIL_FORMAT_COLORSPACE_ZS, 1);
556   }
557
558   if (visual->accum_format != PIPE_FORMAT_NONE) {
559      mode->accumRedBits =
560         util_format_get_component_bits(visual->accum_format,
561               UTIL_FORMAT_COLORSPACE_RGB, 0);
562      mode->accumGreenBits =
563         util_format_get_component_bits(visual->accum_format,
564               UTIL_FORMAT_COLORSPACE_RGB, 1);
565      mode->accumBlueBits =
566         util_format_get_component_bits(visual->accum_format,
567               UTIL_FORMAT_COLORSPACE_RGB, 2);
568      mode->accumAlphaBits =
569         util_format_get_component_bits(visual->accum_format,
570               UTIL_FORMAT_COLORSPACE_RGB, 3);
571   }
572
573   if (visual->samples > 1) {
574      mode->samples = visual->samples;
575   }
576}
577
578
579/**
580 * Create a framebuffer from a manager interface.
581 */
582static struct gl_framebuffer *
583st_framebuffer_create(struct st_context *st,
584                      struct st_framebuffer_iface *stfbi)
585{
586   struct gl_framebuffer *stfb;
587   struct gl_config mode;
588   gl_buffer_index idx;
589   bool prefer_srgb = false;
590
591   if (!stfbi)
592      return NULL;
593
594   stfb = CALLOC_STRUCT(gl_framebuffer);
595   if (!stfb)
596      return NULL;
597
598   st_visual_to_context_mode(stfbi->visual, &mode);
599
600   /*
601    * For desktop GL, sRGB framebuffer write is controlled by both the
602    * capability of the framebuffer and GL_FRAMEBUFFER_SRGB.  We should
603    * advertise the capability when the pipe driver (and core Mesa) supports
604    * it so that applications can enable sRGB write when they want to.
605    *
606    * This is not to be confused with GLX_FRAMEBUFFER_SRGB_CAPABLE_ARB.  When
607    * the attribute is GLX_TRUE, it tells the st manager to pick a color
608    * format such that util_format_srgb(visual->color_format) can be supported
609    * by the pipe driver.  We still need to advertise the capability here.
610    *
611    * For GLES, however, sRGB framebuffer write is initially only controlled
612    * by the capability of the framebuffer, with GL_EXT_sRGB_write_control
613    * control is given back to the applications, but GL_FRAMEBUFFER_SRGB is
614    * still enabled by default since this is the behaviour when
615    * EXT_sRGB_write_control is not available. Since GL_EXT_sRGB_write_control
616    * brings GLES on par with desktop GLs EXT_framebuffer_sRGB, in mesa this
617    * is also expressed by using the same extension flag
618    */
619   if (_mesa_has_EXT_framebuffer_sRGB(st->ctx)) {
620      struct pipe_screen *screen = st->screen;
621      const enum pipe_format srgb_format =
622         util_format_srgb(stfbi->visual->color_format);
623
624      if (srgb_format != PIPE_FORMAT_NONE &&
625          st_pipe_format_to_mesa_format(srgb_format) != MESA_FORMAT_NONE &&
626          screen->is_format_supported(screen, srgb_format,
627                                      PIPE_TEXTURE_2D, stfbi->visual->samples,
628                                      stfbi->visual->samples,
629                                      (PIPE_BIND_DISPLAY_TARGET |
630                                       PIPE_BIND_RENDER_TARGET))) {
631         mode.sRGBCapable = GL_TRUE;
632         /* Since GL_FRAMEBUFFER_SRGB is enabled by default on GLES we must not
633          * create renderbuffers with an sRGB format derived from the
634          * visual->color_format, but we still want sRGB for desktop GL.
635          */
636         prefer_srgb = _mesa_is_desktop_gl(st->ctx);
637      }
638   }
639
640   _mesa_initialize_window_framebuffer(stfb, &mode);
641
642   stfb->iface = stfbi;
643   stfb->iface_ID = stfbi->ID;
644   stfb->iface_stamp = p_atomic_read(&stfbi->stamp) - 1;
645
646   /* add the color buffer */
647   idx = stfb->_ColorDrawBufferIndexes[0];
648   if (!st_framebuffer_add_renderbuffer(stfb, idx, prefer_srgb)) {
649      FREE(stfb);
650      return NULL;
651   }
652
653   st_framebuffer_add_renderbuffer(stfb, BUFFER_DEPTH, false);
654   st_framebuffer_add_renderbuffer(stfb, BUFFER_ACCUM, false);
655
656   stfb->stamp = 0;
657   st_framebuffer_update_attachments(stfb);
658
659   return stfb;
660}
661
662
663static uint32_t
664st_framebuffer_iface_hash(const void *key)
665{
666   return (uintptr_t)key;
667}
668
669
670static bool
671st_framebuffer_iface_equal(const void *a, const void *b)
672{
673   return (struct st_framebuffer_iface *)a == (struct st_framebuffer_iface *)b;
674}
675
676
677static bool
678st_framebuffer_iface_lookup(struct st_manager *smapi,
679                            const struct st_framebuffer_iface *stfbi)
680{
681   struct st_manager_private *smPriv =
682      (struct st_manager_private *)smapi->st_manager_private;
683   struct hash_entry *entry;
684
685   assert(smPriv);
686   assert(smPriv->stfbi_ht);
687
688   simple_mtx_lock(&smPriv->st_mutex);
689   entry = _mesa_hash_table_search(smPriv->stfbi_ht, stfbi);
690   simple_mtx_unlock(&smPriv->st_mutex);
691
692   return entry != NULL;
693}
694
695
696static bool
697st_framebuffer_iface_insert(struct st_manager *smapi,
698                            struct st_framebuffer_iface *stfbi)
699{
700   struct st_manager_private *smPriv =
701      (struct st_manager_private *)smapi->st_manager_private;
702   struct hash_entry *entry;
703
704   assert(smPriv);
705   assert(smPriv->stfbi_ht);
706
707   simple_mtx_lock(&smPriv->st_mutex);
708   entry = _mesa_hash_table_insert(smPriv->stfbi_ht, stfbi, stfbi);
709   simple_mtx_unlock(&smPriv->st_mutex);
710
711   return entry != NULL;
712}
713
714
715static void
716st_framebuffer_iface_remove(struct st_manager *smapi,
717                            struct st_framebuffer_iface *stfbi)
718{
719   struct st_manager_private *smPriv =
720      (struct st_manager_private *)smapi->st_manager_private;
721   struct hash_entry *entry;
722
723   if (!smPriv || !smPriv->stfbi_ht)
724      return;
725
726   simple_mtx_lock(&smPriv->st_mutex);
727   entry = _mesa_hash_table_search(smPriv->stfbi_ht, stfbi);
728   if (!entry)
729      goto unlock;
730
731   _mesa_hash_table_remove(smPriv->stfbi_ht, entry);
732
733unlock:
734   simple_mtx_unlock(&smPriv->st_mutex);
735}
736
737
738/**
739 * The framebuffer interface object is no longer valid.
740 * Remove the object from the framebuffer interface hash table.
741 */
742static void
743st_api_destroy_drawable(struct st_api *stapi,
744                        struct st_framebuffer_iface *stfbi)
745{
746   if (!stfbi)
747      return;
748
749   st_framebuffer_iface_remove(stfbi->state_manager, stfbi);
750}
751
752
753/**
754 * Purge the winsys buffers list to remove any references to
755 * non-existing framebuffer interface objects.
756 */
757static void
758st_framebuffers_purge(struct st_context *st)
759{
760   struct st_context_iface *st_iface = &st->iface;
761   struct st_manager *smapi = st_iface->state_manager;
762   struct gl_framebuffer *stfb, *next;
763
764   assert(smapi);
765
766   LIST_FOR_EACH_ENTRY_SAFE_REV(stfb, next, &st->winsys_buffers, head) {
767      struct st_framebuffer_iface *stfbi = stfb->iface;
768
769      assert(stfbi);
770
771      /**
772       * If the corresponding framebuffer interface object no longer exists,
773       * remove the framebuffer object from the context's winsys buffers list,
774       * and unreference the framebuffer object, so its resources can be
775       * deleted.
776       */
777      if (!st_framebuffer_iface_lookup(smapi, stfbi)) {
778         list_del(&stfb->head);
779         _mesa_reference_framebuffer(&stfb, NULL);
780      }
781   }
782}
783
784
785static void
786st_context_flush(struct st_context_iface *stctxi, unsigned flags,
787                 struct pipe_fence_handle **fence,
788                 void (*before_flush_cb) (void*),
789                 void* args)
790{
791   struct st_context *st = (struct st_context *) stctxi;
792   unsigned pipe_flags = 0;
793
794   if (flags & ST_FLUSH_END_OF_FRAME)
795      pipe_flags |= PIPE_FLUSH_END_OF_FRAME;
796   if (flags & ST_FLUSH_FENCE_FD)
797      pipe_flags |= PIPE_FLUSH_FENCE_FD;
798
799   /* We can do these in any order because FLUSH_VERTICES will also flush
800    * the bitmap cache if there are any unflushed vertices.
801    */
802   st_flush_bitmap_cache(st);
803   FLUSH_VERTICES(st->ctx, 0, 0);
804
805   /* Notify the caller that we're ready to flush */
806   if (before_flush_cb)
807      before_flush_cb(args);
808   st_flush(st, fence, pipe_flags);
809
810   if ((flags & ST_FLUSH_WAIT) && fence && *fence) {
811      st->screen->fence_finish(st->screen, NULL, *fence,
812                                     PIPE_TIMEOUT_INFINITE);
813      st->screen->fence_reference(st->screen, fence, NULL);
814   }
815
816   if (flags & ST_FLUSH_FRONT)
817      st_manager_flush_frontbuffer(st);
818
819   /* DRI3 changes the framebuffer after SwapBuffers, but we need to invoke
820    * st_manager_validate_framebuffers to notice that.
821    *
822    * Set gfx_shaders_may_be_dirty to invoke st_validate_state in the next
823    * draw call, which will invoke st_manager_validate_framebuffers, but it
824    * won't dirty states if there is no change.
825    */
826   if (flags & ST_FLUSH_END_OF_FRAME)
827      st->gfx_shaders_may_be_dirty = true;
828}
829
830static bool
831st_context_teximage(struct st_context_iface *stctxi,
832                    enum st_texture_type tex_type,
833                    int level, enum pipe_format pipe_format,
834                    struct pipe_resource *tex, bool mipmap)
835{
836   struct st_context *st = (struct st_context *) stctxi;
837   struct gl_context *ctx = st->ctx;
838   struct gl_texture_object *texObj;
839   struct gl_texture_image *texImage;
840   GLenum internalFormat;
841   GLuint width, height, depth;
842   GLenum target;
843
844   switch (tex_type) {
845   case ST_TEXTURE_1D:
846      target = GL_TEXTURE_1D;
847      break;
848   case ST_TEXTURE_2D:
849      target = GL_TEXTURE_2D;
850      break;
851   case ST_TEXTURE_3D:
852      target = GL_TEXTURE_3D;
853      break;
854   case ST_TEXTURE_RECT:
855      target = GL_TEXTURE_RECTANGLE_ARB;
856      break;
857   default:
858      return FALSE;
859   }
860
861   texObj = _mesa_get_current_tex_object(ctx, target);
862
863   _mesa_lock_texture(ctx, texObj);
864
865   /* switch to surface based */
866   if (!texObj->surface_based) {
867      _mesa_clear_texture_object(ctx, texObj, NULL);
868      texObj->surface_based = GL_TRUE;
869   }
870
871   texImage = _mesa_get_tex_image(ctx, texObj, target, level);
872   if (tex) {
873      mesa_format texFormat = st_pipe_format_to_mesa_format(pipe_format);
874
875      if (util_format_has_alpha(tex->format))
876         internalFormat = GL_RGBA;
877      else
878         internalFormat = GL_RGB;
879
880      _mesa_init_teximage_fields(ctx, texImage,
881                                 tex->width0, tex->height0, 1, 0,
882                                 internalFormat, texFormat);
883
884      width = tex->width0;
885      height = tex->height0;
886      depth = tex->depth0;
887
888      /* grow the image size until we hit level = 0 */
889      while (level > 0) {
890         if (width != 1)
891            width <<= 1;
892         if (height != 1)
893            height <<= 1;
894         if (depth != 1)
895            depth <<= 1;
896         level--;
897      }
898   }
899   else {
900      _mesa_clear_texture_image(ctx, texImage);
901      width = height = depth = 0;
902   }
903
904   pipe_resource_reference(&texObj->pt, tex);
905   st_texture_release_all_sampler_views(st, texObj);
906   pipe_resource_reference(&texImage->pt, tex);
907   texObj->surface_format = pipe_format;
908
909   texObj->needs_validation = true;
910
911   _mesa_dirty_texobj(ctx, texObj);
912   _mesa_unlock_texture(ctx, texObj);
913
914   return true;
915}
916
917
918static void
919st_context_copy(struct st_context_iface *stctxi,
920                struct st_context_iface *stsrci, unsigned mask)
921{
922   struct st_context *st = (struct st_context *) stctxi;
923   struct st_context *src = (struct st_context *) stsrci;
924
925   _mesa_copy_context(src->ctx, st->ctx, mask);
926}
927
928
929static bool
930st_context_share(struct st_context_iface *stctxi,
931                 struct st_context_iface *stsrci)
932{
933   struct st_context *st = (struct st_context *) stctxi;
934   struct st_context *src = (struct st_context *) stsrci;
935
936   return _mesa_share_state(st->ctx, src->ctx);
937}
938
939
940static void
941st_context_destroy(struct st_context_iface *stctxi)
942{
943   struct st_context *st = (struct st_context *) stctxi;
944   st_destroy_context(st);
945}
946
947
948static void
949st_start_thread(struct st_context_iface *stctxi)
950{
951   struct st_context *st = (struct st_context *) stctxi;
952
953   _mesa_glthread_init(st->ctx);
954}
955
956
957static void
958st_thread_finish(struct st_context_iface *stctxi)
959{
960   struct st_context *st = (struct st_context *) stctxi;
961
962   _mesa_glthread_finish(st->ctx);
963}
964
965
966static void
967st_context_invalidate_state(struct st_context_iface *stctxi,
968                            unsigned flags)
969{
970   struct st_context *st = (struct st_context *) stctxi;
971
972   if (flags & ST_INVALIDATE_FS_SAMPLER_VIEWS)
973      st->dirty |= ST_NEW_FS_SAMPLER_VIEWS;
974   if (flags & ST_INVALIDATE_FS_CONSTBUF0)
975      st->dirty |= ST_NEW_FS_CONSTANTS;
976   if (flags & ST_INVALIDATE_VS_CONSTBUF0)
977      st->dirty |= ST_NEW_VS_CONSTANTS;
978   if (flags & ST_INVALIDATE_VERTEX_BUFFERS) {
979      st->ctx->Array.NewVertexElements = true;
980      st->dirty |= ST_NEW_VERTEX_ARRAYS;
981   }
982}
983
984
985static void
986st_manager_destroy(struct st_manager *smapi)
987{
988   struct st_manager_private *smPriv = smapi->st_manager_private;
989
990   if (smPriv && smPriv->stfbi_ht) {
991      _mesa_hash_table_destroy(smPriv->stfbi_ht, NULL);
992      simple_mtx_destroy(&smPriv->st_mutex);
993      FREE(smPriv);
994      smapi->st_manager_private = NULL;
995   }
996}
997
998
999static struct st_context_iface *
1000st_api_create_context(struct st_api *stapi, struct st_manager *smapi,
1001                      const struct st_context_attribs *attribs,
1002                      enum st_context_error *error,
1003                      struct st_context_iface *shared_stctxi)
1004{
1005   struct st_context *shared_ctx = (struct st_context *) shared_stctxi;
1006   struct st_context *st;
1007   struct pipe_context *pipe;
1008   struct gl_config mode, *mode_ptr = &mode;
1009   gl_api api;
1010   bool no_error = false;
1011   unsigned ctx_flags = PIPE_CONTEXT_PREFER_THREADED;
1012
1013   if (!(stapi->profile_mask & (1 << attribs->profile)))
1014      return NULL;
1015
1016   switch (attribs->profile) {
1017   case ST_PROFILE_DEFAULT:
1018      api = API_OPENGL_COMPAT;
1019      break;
1020   case ST_PROFILE_OPENGL_ES1:
1021      api = API_OPENGLES;
1022      break;
1023   case ST_PROFILE_OPENGL_ES2:
1024      api = API_OPENGLES2;
1025      break;
1026   case ST_PROFILE_OPENGL_CORE:
1027      api = API_OPENGL_CORE;
1028      break;
1029   default:
1030      *error = ST_CONTEXT_ERROR_BAD_API;
1031      return NULL;
1032   }
1033
1034   _mesa_initialize(attribs->options.mesa_extension_override);
1035
1036   /* Create a hash table for the framebuffer interface objects
1037    * if it has not been created for this st manager.
1038    */
1039   if (smapi->st_manager_private == NULL) {
1040      struct st_manager_private *smPriv;
1041
1042      smPriv = CALLOC_STRUCT(st_manager_private);
1043      simple_mtx_init(&smPriv->st_mutex, mtx_plain);
1044      smPriv->stfbi_ht = _mesa_hash_table_create(NULL,
1045                                                 st_framebuffer_iface_hash,
1046                                                 st_framebuffer_iface_equal);
1047      smapi->st_manager_private = smPriv;
1048      smapi->destroy = st_manager_destroy;
1049   }
1050
1051   if (attribs->flags & ST_CONTEXT_FLAG_ROBUST_ACCESS)
1052      ctx_flags |= PIPE_CONTEXT_ROBUST_BUFFER_ACCESS;
1053
1054   if (attribs->flags & ST_CONTEXT_FLAG_NO_ERROR)
1055      no_error = true;
1056
1057   if (attribs->flags & ST_CONTEXT_FLAG_LOW_PRIORITY)
1058      ctx_flags |= PIPE_CONTEXT_LOW_PRIORITY;
1059   else if (attribs->flags & ST_CONTEXT_FLAG_HIGH_PRIORITY)
1060      ctx_flags |= PIPE_CONTEXT_HIGH_PRIORITY;
1061
1062   if (attribs->flags & ST_CONTEXT_FLAG_RESET_NOTIFICATION_ENABLED)
1063      ctx_flags |= PIPE_CONTEXT_LOSE_CONTEXT_ON_RESET;
1064
1065   pipe = smapi->screen->context_create(smapi->screen, NULL, ctx_flags);
1066   if (!pipe) {
1067      *error = ST_CONTEXT_ERROR_NO_MEMORY;
1068      return NULL;
1069   }
1070
1071   st_visual_to_context_mode(&attribs->visual, &mode);
1072   if (attribs->visual.color_format == PIPE_FORMAT_NONE)
1073      mode_ptr = NULL;
1074   st = st_create_context(api, pipe, mode_ptr, shared_ctx,
1075                          &attribs->options, no_error,
1076                          !!smapi->validate_egl_image);
1077   if (!st) {
1078      *error = ST_CONTEXT_ERROR_NO_MEMORY;
1079      pipe->destroy(pipe);
1080      return NULL;
1081   }
1082
1083   if (attribs->flags & ST_CONTEXT_FLAG_DEBUG) {
1084      if (!_mesa_set_debug_state_int(st->ctx, GL_DEBUG_OUTPUT, GL_TRUE)) {
1085         *error = ST_CONTEXT_ERROR_NO_MEMORY;
1086         return NULL;
1087      }
1088
1089      st->ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_DEBUG_BIT;
1090   }
1091
1092   if (st->ctx->Const.ContextFlags & GL_CONTEXT_FLAG_DEBUG_BIT) {
1093      _mesa_update_debug_callback(st->ctx);
1094   }
1095
1096   if (attribs->flags & ST_CONTEXT_FLAG_FORWARD_COMPATIBLE)
1097      st->ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT;
1098   if (attribs->flags & ST_CONTEXT_FLAG_ROBUST_ACCESS) {
1099      st->ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_ROBUST_ACCESS_BIT_ARB;
1100      st->ctx->Const.RobustAccess = GL_TRUE;
1101   }
1102   if (attribs->flags & ST_CONTEXT_FLAG_RESET_NOTIFICATION_ENABLED) {
1103      st->ctx->Const.ResetStrategy = GL_LOSE_CONTEXT_ON_RESET_ARB;
1104      st_install_device_reset_callback(st);
1105   }
1106
1107   if (attribs->flags & ST_CONTEXT_FLAG_RELEASE_NONE)
1108       st->ctx->Const.ContextReleaseBehavior = GL_NONE;
1109
1110   /* need to perform version check */
1111   if (attribs->major > 1 || attribs->minor > 0) {
1112      /* Is the actual version less than the requested version?
1113       */
1114      if (st->ctx->Version < attribs->major * 10U + attribs->minor) {
1115         *error = ST_CONTEXT_ERROR_BAD_VERSION;
1116         st_destroy_context(st);
1117         return NULL;
1118      }
1119   }
1120
1121   st->can_scissor_clear = !!st->screen->get_param(st->screen, PIPE_CAP_CLEAR_SCISSORED);
1122
1123   st->ctx->invalidate_on_gl_viewport =
1124      smapi->get_param(smapi, ST_MANAGER_BROKEN_INVALIDATE);
1125
1126   st->iface.destroy = st_context_destroy;
1127   st->iface.flush = st_context_flush;
1128   st->iface.teximage = st_context_teximage;
1129   st->iface.copy = st_context_copy;
1130   st->iface.share = st_context_share;
1131   st->iface.start_thread = st_start_thread;
1132   st->iface.thread_finish = st_thread_finish;
1133   st->iface.invalidate_state = st_context_invalidate_state;
1134   st->iface.st_context_private = (void *) smapi;
1135   st->iface.cso_context = st->cso_context;
1136   st->iface.pipe = st->pipe;
1137   st->iface.state_manager = smapi;
1138
1139   if (st->ctx->IntelBlackholeRender &&
1140       st->screen->get_param(st->screen, PIPE_CAP_FRONTEND_NOOP))
1141      st->pipe->set_frontend_noop(st->pipe, st->ctx->IntelBlackholeRender);
1142
1143   *error = ST_CONTEXT_SUCCESS;
1144   return &st->iface;
1145}
1146
1147
1148static struct st_context_iface *
1149st_api_get_current(struct st_api *stapi)
1150{
1151   GET_CURRENT_CONTEXT(ctx);
1152   struct st_context *st = ctx ? ctx->st : NULL;
1153
1154   return st ? &st->iface : NULL;
1155}
1156
1157
1158static struct gl_framebuffer *
1159st_framebuffer_reuse_or_create(struct st_context *st,
1160                               struct gl_framebuffer *fb,
1161                               struct st_framebuffer_iface *stfbi)
1162{
1163   struct gl_framebuffer *cur = NULL, *stfb = NULL;
1164
1165   if (!stfbi)
1166      return NULL;
1167
1168   /* Check if there is already a framebuffer object for the specified
1169    * framebuffer interface in this context. If there is one, use it.
1170    */
1171   LIST_FOR_EACH_ENTRY(cur, &st->winsys_buffers, head) {
1172      if (cur->iface_ID == stfbi->ID) {
1173         _mesa_reference_framebuffer(&stfb, cur);
1174         break;
1175      }
1176   }
1177
1178   /* If there is not already a framebuffer object, create one */
1179   if (stfb == NULL) {
1180      cur = st_framebuffer_create(st, stfbi);
1181
1182      if (cur) {
1183         /* add the referenced framebuffer interface object to
1184          * the framebuffer interface object hash table.
1185          */
1186         if (!st_framebuffer_iface_insert(stfbi->state_manager, stfbi)) {
1187            _mesa_reference_framebuffer(&cur, NULL);
1188            return NULL;
1189         }
1190
1191         /* add to the context's winsys buffers list */
1192         list_add(&cur->head, &st->winsys_buffers);
1193
1194         _mesa_reference_framebuffer(&stfb, cur);
1195      }
1196   }
1197
1198   return stfb;
1199}
1200
1201
1202static bool
1203st_api_make_current(struct st_api *stapi, struct st_context_iface *stctxi,
1204                    struct st_framebuffer_iface *stdrawi,
1205                    struct st_framebuffer_iface *streadi)
1206{
1207   struct st_context *st = (struct st_context *) stctxi;
1208   struct gl_framebuffer *stdraw, *stread;
1209   bool ret;
1210
1211   if (st) {
1212      /* reuse or create the draw fb */
1213      stdraw = st_framebuffer_reuse_or_create(st,
1214            st->ctx->WinSysDrawBuffer, stdrawi);
1215      if (streadi != stdrawi) {
1216         /* do the same for the read fb */
1217         stread = st_framebuffer_reuse_or_create(st,
1218               st->ctx->WinSysReadBuffer, streadi);
1219      }
1220      else {
1221         stread = NULL;
1222         /* reuse the draw fb for the read fb */
1223         if (stdraw)
1224            _mesa_reference_framebuffer(&stread, stdraw);
1225      }
1226
1227      /* If framebuffers were asked for, we'd better have allocated them */
1228      if ((stdrawi && !stdraw) || (streadi && !stread))
1229         return false;
1230
1231      if (stdraw && stread) {
1232         st_framebuffer_validate(stdraw, st);
1233         if (stread != stdraw)
1234            st_framebuffer_validate(stread, st);
1235
1236         ret = _mesa_make_current(st->ctx, stdraw, stread);
1237
1238         st->draw_stamp = stdraw->stamp - 1;
1239         st->read_stamp = stread->stamp - 1;
1240         st_context_validate(st, stdraw, stread);
1241      }
1242      else {
1243         struct gl_framebuffer *incomplete = _mesa_get_incomplete_framebuffer();
1244         ret = _mesa_make_current(st->ctx, incomplete, incomplete);
1245      }
1246
1247      _mesa_reference_framebuffer(&stdraw, NULL);
1248      _mesa_reference_framebuffer(&stread, NULL);
1249
1250      /* Purge the context's winsys_buffers list in case any
1251       * of the referenced drawables no longer exist.
1252       */
1253      st_framebuffers_purge(st);
1254   }
1255   else {
1256      GET_CURRENT_CONTEXT(ctx);
1257
1258      if (ctx) {
1259         /* Before releasing the context, release its associated
1260          * winsys buffers first. Then purge the context's winsys buffers list
1261          * to free the resources of any winsys buffers that no longer have
1262          * an existing drawable.
1263          */
1264         ret = _mesa_make_current(ctx, NULL, NULL);
1265         st_framebuffers_purge(ctx->st);
1266      }
1267
1268      ret = _mesa_make_current(NULL, NULL, NULL);
1269   }
1270
1271   return ret;
1272}
1273
1274
1275static void
1276st_api_destroy(struct st_api *stapi)
1277{
1278}
1279
1280
1281/**
1282 * Flush the front buffer if the current context renders to the front buffer.
1283 */
1284void
1285st_manager_flush_frontbuffer(struct st_context *st)
1286{
1287   struct gl_framebuffer *stfb = st_ws_framebuffer(st->ctx->DrawBuffer);
1288   struct gl_renderbuffer *rb = NULL;
1289
1290   if (!stfb)
1291      return;
1292
1293   /* If the context uses a doublebuffered visual, but the buffer is
1294    * single-buffered, guess that it's a pbuffer, which doesn't need
1295    * flushing.
1296    */
1297   if (st->ctx->Visual.doubleBufferMode &&
1298       !stfb->Visual.doubleBufferMode)
1299      return;
1300
1301   /* Check front buffer used at the GL API level. */
1302   enum st_attachment_type statt = ST_ATTACHMENT_FRONT_LEFT;
1303   rb = stfb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer;
1304   if (!rb) {
1305       /* Check back buffer redirected by EGL_KHR_mutable_render_buffer. */
1306       statt = ST_ATTACHMENT_BACK_LEFT;
1307       rb = stfb->Attachment[BUFFER_BACK_LEFT].Renderbuffer;
1308   }
1309
1310   /* Do we have a front color buffer and has it been drawn to since last
1311    * frontbuffer flush?
1312    */
1313   if (rb && rb->defined &&
1314       stfb->iface->flush_front(&st->iface, stfb->iface, statt)) {
1315      rb->defined = GL_FALSE;
1316
1317      /* Trigger an update of rb->defined on next draw */
1318      st->dirty |= ST_NEW_FB_STATE;
1319   }
1320}
1321
1322
1323/**
1324 * Re-validate the framebuffers.
1325 */
1326void
1327st_manager_validate_framebuffers(struct st_context *st)
1328{
1329   struct gl_framebuffer *stdraw = st_ws_framebuffer(st->ctx->DrawBuffer);
1330   struct gl_framebuffer *stread = st_ws_framebuffer(st->ctx->ReadBuffer);
1331
1332   if (stdraw)
1333      st_framebuffer_validate(stdraw, st);
1334   if (stread && stread != stdraw)
1335      st_framebuffer_validate(stread, st);
1336
1337   st_context_validate(st, stdraw, stread);
1338}
1339
1340
1341/**
1342 * Flush any outstanding swapbuffers on the current draw framebuffer.
1343 */
1344void
1345st_manager_flush_swapbuffers(void)
1346{
1347   GET_CURRENT_CONTEXT(ctx);
1348   struct st_context *st = (ctx) ? ctx->st : NULL;
1349   struct gl_framebuffer *stfb;
1350
1351   if (!st)
1352      return;
1353
1354   stfb = st_ws_framebuffer(ctx->DrawBuffer);
1355   if (!stfb || !stfb->iface->flush_swapbuffers)
1356      return;
1357
1358   stfb->iface->flush_swapbuffers(&st->iface, stfb->iface);
1359}
1360
1361
1362/**
1363 * Add a color renderbuffer on demand.  The FBO must correspond to a window,
1364 * not a user-created FBO.
1365 */
1366bool
1367st_manager_add_color_renderbuffer(struct gl_context *ctx,
1368                                  struct gl_framebuffer *fb,
1369                                  gl_buffer_index idx)
1370{
1371   struct gl_framebuffer *stfb = st_ws_framebuffer(fb);
1372
1373   /* FBO */
1374   if (!stfb)
1375      return false;
1376
1377   assert(_mesa_is_winsys_fbo(fb));
1378
1379   if (stfb->Attachment[idx].Renderbuffer)
1380      return true;
1381
1382   switch (idx) {
1383   case BUFFER_FRONT_LEFT:
1384   case BUFFER_BACK_LEFT:
1385   case BUFFER_FRONT_RIGHT:
1386   case BUFFER_BACK_RIGHT:
1387      break;
1388   default:
1389      return false;
1390   }
1391
1392   if (!st_framebuffer_add_renderbuffer(stfb, idx,
1393                                        stfb->Visual.sRGBCapable))
1394      return false;
1395
1396   st_framebuffer_update_attachments(stfb);
1397
1398   /*
1399    * Force a call to the frontend manager to validate the
1400    * new renderbuffer. It might be that there is a window system
1401    * renderbuffer available.
1402    */
1403   if (stfb->iface)
1404      stfb->iface_stamp = p_atomic_read(&stfb->iface->stamp) - 1;
1405
1406   st_invalidate_buffers(st_context(ctx));
1407
1408   return true;
1409}
1410
1411
1412static unsigned
1413get_version(struct pipe_screen *screen,
1414            struct st_config_options *options, gl_api api)
1415{
1416   struct gl_constants consts = {0};
1417   struct gl_extensions extensions = {0};
1418   GLuint version;
1419
1420   if (_mesa_override_gl_version_contextless(&consts, &api, &version)) {
1421      return version;
1422   }
1423
1424   _mesa_init_constants(&consts, api);
1425   _mesa_init_extensions(&extensions);
1426
1427   st_init_limits(screen, &consts, &extensions);
1428   st_init_extensions(screen, &consts, &extensions, options, api);
1429   version = _mesa_get_version(&extensions, &consts, api);
1430   free(consts.SpirVExtensions);
1431   return version;
1432}
1433
1434
1435static void
1436st_api_query_versions(struct st_api *stapi, struct st_manager *sm,
1437                      struct st_config_options *options,
1438                      int *gl_core_version,
1439                      int *gl_compat_version,
1440                      int *gl_es1_version,
1441                      int *gl_es2_version)
1442{
1443   *gl_core_version = get_version(sm->screen, options, API_OPENGL_CORE);
1444   *gl_compat_version = get_version(sm->screen, options, API_OPENGL_COMPAT);
1445   *gl_es1_version = get_version(sm->screen, options, API_OPENGLES);
1446   *gl_es2_version = get_version(sm->screen, options, API_OPENGLES2);
1447}
1448
1449
1450static const struct st_api st_gl_api = {
1451   .name = "Mesa " PACKAGE_VERSION,
1452   .api = ST_API_OPENGL,
1453   .profile_mask = ST_PROFILE_DEFAULT_MASK |
1454                   ST_PROFILE_OPENGL_CORE_MASK |
1455                   ST_PROFILE_OPENGL_ES1_MASK |
1456                   ST_PROFILE_OPENGL_ES2_MASK |
1457                   0,
1458   .feature_mask = ST_API_FEATURE_MS_VISUALS_MASK,
1459   .destroy = st_api_destroy,
1460   .query_versions = st_api_query_versions,
1461   .create_context = st_api_create_context,
1462   .make_current = st_api_make_current,
1463   .get_current = st_api_get_current,
1464   .destroy_drawable = st_api_destroy_drawable,
1465};
1466
1467
1468struct st_api *
1469st_gl_api_create(void)
1470{
1471   return (struct st_api *) &st_gl_api;
1472}
1473
1474void
1475st_manager_invalidate_drawables(struct gl_context *ctx)
1476{
1477   struct gl_framebuffer *stdraw;
1478   struct gl_framebuffer *stread;
1479
1480   /*
1481    * Normally we'd want the frontend manager to mark the drawables
1482    * invalid only when needed. This will force the frontend manager
1483    * to revalidate the drawable, rather than just update the context with
1484    * the latest cached drawable info.
1485    */
1486
1487   stdraw = st_ws_framebuffer(ctx->DrawBuffer);
1488   stread = st_ws_framebuffer(ctx->ReadBuffer);
1489
1490   if (stdraw)
1491      stdraw->iface_stamp = p_atomic_read(&stdraw->iface->stamp) - 1;
1492   if (stread && stread != stdraw)
1493      stread->iface_stamp = p_atomic_read(&stread->iface->stamp) - 1;
1494}
1495