aboutsummaryrefslogtreecommitdiffstats
path: root/src/mesa/state_tracker/st_framebuffer.c
blob: a5d1ae3b034388dd713b35ee0ae7d82e20d84366 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
/**************************************************************************
 * 
 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
 * All Rights Reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 * 
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * 
 **************************************************************************/


#include "main/imports.h"
#include "main/buffers.h"
#include "main/context.h"
#include "main/framebuffer.h"
#include "main/matrix.h"
#include "main/renderbuffer.h"
#include "main/scissor.h"
#include "main/viewport.h"
#include "st_context.h"
#include "st_cb_fbo.h"
#include "st_public.h"
#include "pipe/p_defines.h"
#include "pipe/p_context.h"


struct st_framebuffer *
st_create_framebuffer( const __GLcontextModes *visual,
                       enum pipe_format colorFormat,
                       enum pipe_format depthFormat,
                       enum pipe_format stencilFormat,
                       uint width, uint height,
                       void *private)
{
   struct st_framebuffer *stfb = ST_CALLOC_STRUCT(st_framebuffer);
   if (stfb) {
      int samples = st_get_msaa();
      int i;

      if (visual->sampleBuffers)
         samples = visual->samples;

      _mesa_initialize_framebuffer(&stfb->Base, visual);

      if (visual->doubleBufferMode) {
         struct gl_renderbuffer *rb
            = st_new_renderbuffer_fb(colorFormat, samples, FALSE);
         _mesa_add_renderbuffer(&stfb->Base, BUFFER_BACK_LEFT, rb);
      }
      else {
         /* Only allocate front buffer right now if we're single buffered.
          * If double-buffered, allocate front buffer on demand later.
          * See check_create_front_buffers() and st_set_framebuffer_surface().
          */
         struct gl_renderbuffer *rb
            = st_new_renderbuffer_fb(colorFormat, samples, FALSE);
         _mesa_add_renderbuffer(&stfb->Base, BUFFER_FRONT_LEFT, rb);
      }

      if (depthFormat == stencilFormat && depthFormat != PIPE_FORMAT_NONE) {
         /* combined depth/stencil buffer */
         struct gl_renderbuffer *depthStencilRb
            = st_new_renderbuffer_fb(depthFormat, samples, FALSE);
         /* note: bind RB to two attachment points */
         _mesa_add_renderbuffer(&stfb->Base, BUFFER_DEPTH, depthStencilRb);
         _mesa_add_renderbuffer(&stfb->Base, BUFFER_STENCIL, depthStencilRb);
      }
      else {
         /* separate depth and/or stencil */

         if (visual->depthBits == 32) {
            /* 32-bit depth buffer */
            struct gl_renderbuffer *depthRb
               = st_new_renderbuffer_fb(depthFormat, samples, FALSE);
            _mesa_add_renderbuffer(&stfb->Base, BUFFER_DEPTH, depthRb);
         }
         else if (visual->depthBits == 24) {
            /* 24-bit depth buffer, ignore stencil bits */
            struct gl_renderbuffer *depthRb
               = st_new_renderbuffer_fb(depthFormat, samples, FALSE);
            _mesa_add_renderbuffer(&stfb->Base, BUFFER_DEPTH, depthRb);
         }
         else if (visual->depthBits > 0) {
            /* 16-bit depth buffer */
            struct gl_renderbuffer *depthRb
               = st_new_renderbuffer_fb(depthFormat, samples, FALSE);
            _mesa_add_renderbuffer(&stfb->Base, BUFFER_DEPTH, depthRb);
         }

         if (visual->stencilBits > 0) {
            /* 8-bit stencil */
            struct gl_renderbuffer *stencilRb
               = st_new_renderbuffer_fb(stencilFormat, samples, FALSE);
            _mesa_add_renderbuffer(&stfb->Base, BUFFER_STENCIL, stencilRb);
         }
      }

      if (visual->accumRedBits > 0) {
         /* 16-bit/channel accum */
         /* TODO: query the pipe screen for accumulation buffer format support */
         struct gl_renderbuffer *accumRb
            = st_new_renderbuffer_fb(PIPE_FORMAT_R16G16B16A16_SNORM, 0, TRUE);
         _mesa_add_renderbuffer(&stfb->Base, BUFFER_ACCUM, accumRb);
      }

      for (i = 0; i < visual->numAuxBuffers; i++) {
         struct gl_renderbuffer *aux
            = st_new_renderbuffer_fb(colorFormat, 0, FALSE);
         _mesa_add_renderbuffer(&stfb->Base, BUFFER_AUX0 + i, aux);
      }

      stfb->Base.Initialized = GL_TRUE;
      stfb->InitWidth = width;
      stfb->InitHeight = height;
      stfb->Private = private;
   }
   return stfb;
}


void st_resize_framebuffer( struct st_framebuffer *stfb,
                            uint width, uint height )
{
   if (stfb->Base.Width != width || stfb->Base.Height != height) {
      GET_CURRENT_CONTEXT(ctx);
      if (ctx) {
         _mesa_check_init_viewport(ctx, width, height);

         _mesa_resize_framebuffer(ctx, &stfb->Base, width, height);

         assert(stfb->Base.Width == width);
         assert(stfb->Base.Height == height);
      }
   }
}


void st_unreference_framebuffer( struct st_framebuffer *stfb )
{
   _mesa_reference_framebuffer((struct gl_framebuffer **) &stfb, NULL);
}



/**
 * Set/replace a framebuffer surface.
 * The user of the state tracker can use this instead of
 * st_resize_framebuffer() to provide new surfaces when a window is resized.
 */
void
st_set_framebuffer_surface(struct st_framebuffer *stfb,
                           uint surfIndex, struct pipe_surface *surf)
{
   GET_CURRENT_CONTEXT(ctx);
   static const GLuint invalid_size = 9999999;
   struct st_renderbuffer *strb;
   GLuint width, height, i;

   assert(surfIndex < BUFFER_COUNT);

   strb = st_renderbuffer(stfb->Base.Attachment[surfIndex].Renderbuffer);

   if (!strb) {
      if (surfIndex == ST_SURFACE_FRONT_LEFT) {
         /* Delayed creation when the window system supplies a fake front buffer */
         struct st_renderbuffer *strb_back
            = st_renderbuffer(stfb->Base.Attachment[ST_SURFACE_BACK_LEFT].Renderbuffer);
         struct gl_renderbuffer *rb
            = st_new_renderbuffer_fb(surf->format, strb_back->Base.NumSamples, FALSE);
         _mesa_add_renderbuffer(&stfb->Base, BUFFER_FRONT_LEFT, rb);
         strb = st_renderbuffer(rb);
      } else {
         /* fail */
         return;
      }
   }

   /* replace the renderbuffer's surface/texture pointers */
   pipe_surface_reference( &strb->surface, surf );
   pipe_texture_reference( &strb->texture, surf->texture );

   if (ctx) {
      /* If ctx isn't set, we've likely not made current yet.
       * But when we do, we need to start setting this dirty bit
       * to ensure the renderbuffer attachements are up-to-date
       * via update_framebuffer.
       */
      ctx->st->dirty.st |= ST_NEW_FRAMEBUFFER;
   }

   /* update renderbuffer's width/height */
   strb->Base.Width = surf->width;
   strb->Base.Height = surf->height;

   /* Try to update the framebuffer's width/height from the renderbuffer
    * sizes.  Before we start drawing, all the rbs _should_ be the same size.
    */
   width = height = invalid_size;
   for (i = 0; i < BUFFER_COUNT; i++) {
      if (stfb->Base.Attachment[i].Renderbuffer) {
         if (width == invalid_size) {
            width = stfb->Base.Attachment[i].Renderbuffer->Width;
            height = stfb->Base.Attachment[i].Renderbuffer->Height;
         }
         else if (width != stfb->Base.Attachment[i].Renderbuffer->Width ||
                  height != stfb->Base.Attachment[i].Renderbuffer->Height) {
            /* inconsistant renderbuffer sizes, bail out */
            return;
         }
      }
   }

   if (width != invalid_size) {
      /* OK, the renderbuffers are of a consistant size, so update the
       * parent framebuffer's size.
       */
      stfb->Base.Width = width;
      stfb->Base.Height = height;
   }
}



/**
 * Return the pipe_surface for the given renderbuffer.
 */
int
st_get_framebuffer_surface(struct st_framebuffer *stfb, uint surfIndex, struct pipe_surface **surface)
{
   struct st_renderbuffer *strb;

   assert(surfIndex <= ST_SURFACE_DEPTH);

   /* sanity checks, ST tokens should match Mesa tokens */
   assert(ST_SURFACE_FRONT_LEFT == BUFFER_FRONT_LEFT);
   assert(ST_SURFACE_BACK_RIGHT == BUFFER_BACK_RIGHT);

   strb = st_renderbuffer(stfb->Base.Attachment[surfIndex].Renderbuffer);
   if (strb) {
      *surface = strb->surface;
      return GL_TRUE;
   }

   *surface = NULL;
   return GL_FALSE;
}

int
st_get_framebuffer_texture(struct st_framebuffer *stfb, uint surfIndex, struct pipe_texture **texture)
{
   struct st_renderbuffer *strb;

   assert(surfIndex <= ST_SURFACE_DEPTH);

   /* sanity checks, ST tokens should match Mesa tokens */
   assert(ST_SURFACE_FRONT_LEFT == BUFFER_FRONT_LEFT);
   assert(ST_SURFACE_BACK_RIGHT == BUFFER_BACK_RIGHT);

   strb = st_renderbuffer(stfb->Base.Attachment[surfIndex].Renderbuffer);
   if (strb) {
      *texture = strb->texture;
      return GL_TRUE;
   }

   *texture = NULL;
   return GL_FALSE;
}

/**
 * This function is to be called prior to SwapBuffers on the given
 * framebuffer.  It checks if the current context is bound to the framebuffer
 * and flushes rendering if needed.
 */
void
st_notify_swapbuffers(struct st_framebuffer *stfb)
{
   GET_CURRENT_CONTEXT(ctx);

   if (ctx && ctx->DrawBuffer == &stfb->Base) {
      st_flush( ctx->st, 
		PIPE_FLUSH_RENDER_CACHE | 
		PIPE_FLUSH_SWAPBUFFERS |
		PIPE_FLUSH_FRAME,
                NULL );
      if (st_renderbuffer(stfb->Base.Attachment[BUFFER_BACK_LEFT].Renderbuffer))
         ctx->st->frontbuffer_status = FRONT_STATUS_COPY_OF_BACK;
   }
}


/**
 * Swap the front/back color buffers.  Exchange the front/back pointers
 * and update some derived state.
 * No need to call st_notify_swapbuffers() first.
 *
 * For a single-buffered framebuffer, no swap occurs, but we still return
 * the pointer(s) to the front color buffer(s).
 *
 * \param front_left  returns pointer to front-left renderbuffer after swap
 * \param front_right  returns pointer to front-right renderbuffer after swap
 */
void
st_swapbuffers(struct st_framebuffer *stfb,
               struct pipe_surface **front_left,
               struct pipe_surface **front_right)
{
   struct gl_framebuffer *fb = &stfb->Base;

   GET_CURRENT_CONTEXT(ctx);

   if (ctx && ctx->DrawBuffer == &stfb->Base) {
      st_flush( ctx->st, 
		PIPE_FLUSH_RENDER_CACHE | 
		PIPE_FLUSH_SWAPBUFFERS |
		PIPE_FLUSH_FRAME,
                NULL );
   }

   if (!fb->Visual.doubleBufferMode) {
      /* single buffer mode - return pointers to front surfaces */
      if (front_left) {
         struct st_renderbuffer *strb =
            st_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer);
         *front_left = strb->surface;
      }
      if (front_right) {
         struct st_renderbuffer *strb =
            st_renderbuffer(fb->Attachment[BUFFER_FRONT_RIGHT].Renderbuffer);
         *front_right = strb ? strb->surface : NULL;
      }
      return;
   }

   /* swap left buffers */
   if (fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer &&
       fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer) {
      struct gl_renderbuffer *rbTemp;
      rbTemp = fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer;
      fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer =
         fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer;
      fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer = rbTemp;
      if (front_left) {
         struct st_renderbuffer *strb =
            st_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer);
         *front_left = strb->surface;
      }
      /* mark back buffer contents as undefined */
      {
         struct st_renderbuffer *back =
            st_renderbuffer(fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer);
         back->defined = GL_FALSE;
      }
   }
   else {
      /* no front buffer, display the back buffer */
      if (front_left) {
         struct st_renderbuffer *strb =
            st_renderbuffer(fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer);
         *front_left = strb->surface;
      }
   }

   /* swap right buffers (for stereo) */
   if (fb->Attachment[BUFFER_FRONT_RIGHT].Renderbuffer &&
       fb->Attachment[BUFFER_BACK_RIGHT].Renderbuffer) {
      struct gl_renderbuffer *rbTemp;
      rbTemp = fb->Attachment[BUFFER_FRONT_RIGHT].Renderbuffer;
      fb->Attachment[BUFFER_FRONT_RIGHT].Renderbuffer =
         fb->Attachment[BUFFER_BACK_RIGHT].Renderbuffer;
      fb->Attachment[BUFFER_BACK_RIGHT].Renderbuffer = rbTemp;
      if (front_right) {
         struct st_renderbuffer *strb =
            st_renderbuffer(fb->Attachment[BUFFER_FRONT_RIGHT].Renderbuffer);
         *front_right = strb->surface;
      }
      /* mark back buffer contents as undefined */
      {
         struct st_renderbuffer *back =
            st_renderbuffer(fb->Attachment[BUFFER_BACK_RIGHT].Renderbuffer);
         back->defined = GL_FALSE;
      }
   }
   else {
      /* no front right buffer, display back right buffer (if exists) */
      if (front_right) {
         struct st_renderbuffer *strb =
            st_renderbuffer(fb->Attachment[BUFFER_BACK_RIGHT].Renderbuffer);
         *front_right = strb ? strb->surface : NULL;
      }
   }

   /* Update the _ColorDrawBuffers[] array and _ColorReadBuffer pointer */
   _mesa_update_framebuffer(ctx);

   /* Make sure we draw into the new back surface */
   st_invalidate_state(ctx, _NEW_BUFFERS);
}


void *st_framebuffer_private( struct st_framebuffer *stfb )
{
   return stfb->Private;
}

void st_get_framebuffer_dimensions( struct st_framebuffer *stfb,
				    uint *width,
				    uint *height)
{
   *width = stfb->Base.Width;
   *height = stfb->Base.Height;
}