summaryrefslogtreecommitdiff
path: root/src/mesa/drivers/dri/intel/intel_blit.c
blob: f14854602b677b0b2bb3abab2aada0370a7b1637 (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
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
/**************************************************************************
 * 
 * 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/mtypes.h"
#include "main/context.h"
#include "main/enums.h"
#include "main/colormac.h"

#include "intel_blit.h"
#include "intel_buffers.h"
#include "intel_context.h"
#include "intel_fbo.h"
#include "intel_reg.h"
#include "intel_regions.h"
#include "intel_batchbuffer.h"
#include "intel_chipset.h"

#define FILE_DEBUG_FLAG DEBUG_BLIT

/**
 * Copy the back color buffer to the front color buffer. 
 * Used for SwapBuffers().
 */
void
intelCopyBuffer(const __DRIdrawablePrivate * dPriv,
                const drm_clip_rect_t * rect)
{

   struct intel_context *intel;
   const intelScreenPrivate *intelScreen;

   DBG("%s\n", __FUNCTION__);

   assert(dPriv);

   intel = intelScreenContext(dPriv->driScreenPriv->private);
   if (!intel)
      return;

   intelScreen = intel->intelScreen;

   /* The LOCK_HARDWARE is required for the cliprects.  Buffer offsets
    * should work regardless.
    */
   LOCK_HARDWARE(intel);

   if (dPriv && dPriv->numClipRects) {
      struct intel_framebuffer *intel_fb = dPriv->driverPrivate;
      struct intel_region *src, *dst;
      int nbox = dPriv->numClipRects;
      drm_clip_rect_t *pbox = dPriv->pClipRects;
      int cpp;
      int src_pitch, dst_pitch;
      unsigned short src_x, src_y;
      int BR13, CMD;
      int i;
      dri_bo *aper_array[3];

      src = intel_get_rb_region(&intel_fb->Base, BUFFER_BACK_LEFT);
      dst = intel_get_rb_region(&intel_fb->Base, BUFFER_FRONT_LEFT);

      src_pitch = src->pitch * src->cpp;
      dst_pitch = dst->pitch * dst->cpp;

      cpp = src->cpp;

      ASSERT(intel_fb);
      ASSERT(intel_fb->Base.Name == 0);    /* Not a user-created FBO */
      ASSERT(src);
      ASSERT(dst);
      ASSERT(src->cpp == dst->cpp);

      if (cpp == 2) {
	 BR13 = (0xCC << 16) | BR13_565;
	 CMD = XY_SRC_COPY_BLT_CMD;
      }
      else {
	 BR13 = (0xCC << 16) | BR13_8888;
	 CMD = XY_SRC_COPY_BLT_CMD | XY_BLT_WRITE_ALPHA | XY_BLT_WRITE_RGB;
      }

      assert(src->tiling != I915_TILING_Y);
      assert(dst->tiling != I915_TILING_Y);
#ifndef I915
      if (src->tiling != I915_TILING_NONE) {
	 CMD |= XY_SRC_TILED;
	 src_pitch /= 4;
      }
      if (dst->tiling != I915_TILING_NONE) {
	 CMD |= XY_DST_TILED;
	 dst_pitch /= 4;
      }
#endif
      /* do space/cliprects check before going any further */
      intel_batchbuffer_require_space(intel->batch, 8 * 4,
				      REFERENCES_CLIPRECTS);
   again:
      aper_array[0] = intel->batch->buf;
      aper_array[1] = dst->buffer;
      aper_array[2] = src->buffer;

      if (dri_bufmgr_check_aperture_space(aper_array, 3) != 0) {
	intel_batchbuffer_flush(intel->batch);
	goto again;
      }

      for (i = 0; i < nbox; i++, pbox++) {
	 drm_clip_rect_t box = *pbox;

	 if (rect) {
	    if (!intel_intersect_cliprects(&box, &box, rect))
	       continue;
	 }

	 if (box.x1 >= box.x2 ||
	     box.y1 >= box.y2)
	    continue;

	 assert(box.x1 < box.x2);
	 assert(box.y1 < box.y2);
	 src_x = box.x1 - dPriv->x + dPriv->backX;
	 src_y = box.y1 - dPriv->y + dPriv->backY;

	 BEGIN_BATCH(8, REFERENCES_CLIPRECTS);
	 OUT_BATCH(CMD);
	 OUT_BATCH(BR13 | dst_pitch);
	 OUT_BATCH((box.y1 << 16) | box.x1);
	 OUT_BATCH((box.y2 << 16) | box.x2);

	 OUT_RELOC(dst->buffer,
		   I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER,
		   0);
	 OUT_BATCH((src_y << 16) | src_x);
	 OUT_BATCH(src_pitch);
	 OUT_RELOC(src->buffer,
		   I915_GEM_DOMAIN_RENDER, 0,
		   0);
	 ADVANCE_BATCH();
      }

      /* Flush the rendering and the batch so that the results all land on the
       * screen in a timely fashion.
       */
      intel_batchbuffer_emit_mi_flush(intel->batch);
      intel_batchbuffer_flush(intel->batch);
   }

   UNLOCK_HARDWARE(intel);
}

static GLuint translate_raster_op(GLenum logicop)
{
   switch(logicop) {
   case GL_CLEAR: return 0x00;
   case GL_AND: return 0x88;
   case GL_AND_REVERSE: return 0x44;
   case GL_COPY: return 0xCC;
   case GL_AND_INVERTED: return 0x22;
   case GL_NOOP: return 0xAA;
   case GL_XOR: return 0x66;
   case GL_OR: return 0xEE;
   case GL_NOR: return 0x11;
   case GL_EQUIV: return 0x99;
   case GL_INVERT: return 0x55;
   case GL_OR_REVERSE: return 0xDD;
   case GL_COPY_INVERTED: return 0x33;
   case GL_OR_INVERTED: return 0xBB;
   case GL_NAND: return 0x77;
   case GL_SET: return 0xFF;
   default: return 0;
   }
}


/* Copy BitBlt
 */
GLboolean
intelEmitCopyBlit(struct intel_context *intel,
		  GLuint cpp,
		  GLshort src_pitch,
		  dri_bo *src_buffer,
		  GLuint src_offset,
		  uint32_t src_tiling,
		  GLshort dst_pitch,
		  dri_bo *dst_buffer,
		  GLuint dst_offset,
		  uint32_t dst_tiling,
		  GLshort src_x, GLshort src_y,
		  GLshort dst_x, GLshort dst_y,
		  GLshort w, GLshort h,
		  GLenum logic_op)
{
   GLuint CMD, BR13, pass = 0;
   int dst_y2 = dst_y + h;
   int dst_x2 = dst_x + w;
   dri_bo *aper_array[3];
   BATCH_LOCALS;

   if (dst_tiling != I915_TILING_NONE) {
      if (dst_offset & 4095)
	 return GL_FALSE;
      if (dst_tiling == I915_TILING_Y)
	 return GL_FALSE;
   }
   if (src_tiling != I915_TILING_NONE) {
      if (src_offset & 4095)
	 return GL_FALSE;
      if (src_tiling == I915_TILING_Y)
	 return GL_FALSE;
   }

   /* do space/cliprects check before going any further */
   do {
       aper_array[0] = intel->batch->buf;
       aper_array[1] = dst_buffer;
       aper_array[2] = src_buffer;

       if (dri_bufmgr_check_aperture_space(aper_array, 3) != 0) {
           intel_batchbuffer_flush(intel->batch);
           pass++;
       } else
           break;
   } while (pass < 2);

   if (pass >= 2) {
       LOCK_HARDWARE(intel);
       dri_bo_map(dst_buffer, GL_TRUE);
       dri_bo_map(src_buffer, GL_FALSE);
       _mesa_copy_rect((GLubyte *)dst_buffer->virtual + dst_offset,
                       cpp,
                       dst_pitch,
                       dst_x, dst_y, 
                       w, h, 
                       (GLubyte *)src_buffer->virtual + src_offset, 
                       src_pitch,
                       src_x, src_y);
       
       dri_bo_unmap(src_buffer);
       dri_bo_unmap(dst_buffer);
       UNLOCK_HARDWARE(intel);

       return GL_TRUE;
   }

   intel_batchbuffer_require_space(intel->batch, 8 * 4, NO_LOOP_CLIPRECTS);
   DBG("%s src:buf(%p)/%d+%d %d,%d dst:buf(%p)/%d+%d %d,%d sz:%dx%d\n",
       __FUNCTION__,
       src_buffer, src_pitch, src_offset, src_x, src_y,
       dst_buffer, dst_pitch, dst_offset, dst_x, dst_y, w, h);

   src_pitch *= cpp;
   dst_pitch *= cpp;

   BR13 = translate_raster_op(logic_op) << 16;

   switch (cpp) {
   case 1:
      CMD = XY_SRC_COPY_BLT_CMD;
      break;
   case 2:
      BR13 |= BR13_565;
      CMD = XY_SRC_COPY_BLT_CMD;
      break;
   case 4:
      BR13 |= BR13_8888;
      CMD = XY_SRC_COPY_BLT_CMD | XY_BLT_WRITE_ALPHA | XY_BLT_WRITE_RGB;
      break;
   default:
      return GL_FALSE;
   }

#ifndef I915
   if (dst_tiling != I915_TILING_NONE) {
      CMD |= XY_DST_TILED;
      dst_pitch /= 4;
   }
   if (src_tiling != I915_TILING_NONE) {
      CMD |= XY_SRC_TILED;
      src_pitch /= 4;
   }
#endif

   if (dst_y2 <= dst_y || dst_x2 <= dst_x) {
      return GL_TRUE;
   }

   assert(dst_x < dst_x2);
   assert(dst_y < dst_y2);

   BEGIN_BATCH(8, NO_LOOP_CLIPRECTS);
   OUT_BATCH(CMD);
   OUT_BATCH(BR13 | (uint16_t)dst_pitch);
   OUT_BATCH((dst_y << 16) | dst_x);
   OUT_BATCH((dst_y2 << 16) | dst_x2);
   OUT_RELOC(dst_buffer,
	     I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER,
	     dst_offset);
   OUT_BATCH((src_y << 16) | src_x);
   OUT_BATCH((uint16_t)src_pitch);
   OUT_RELOC(src_buffer,
	     I915_GEM_DOMAIN_RENDER, 0,
	     src_offset);
   ADVANCE_BATCH();

   intel_batchbuffer_emit_mi_flush(intel->batch);

   return GL_TRUE;
}


/**
 * Use blitting to clear the renderbuffers named by 'flags'.
 * Note: we can't use the ctx->DrawBuffer->_ColorDrawBufferIndexes field
 * since that might include software renderbuffers or renderbuffers
 * which we're clearing with triangles.
 * \param mask  bitmask of BUFFER_BIT_* values indicating buffers to clear
 */
void
intelClearWithBlit(GLcontext *ctx, GLbitfield mask)
{
   struct intel_context *intel = intel_context(ctx);
   struct gl_framebuffer *fb = ctx->DrawBuffer;
   GLuint clear_depth;
   GLbitfield skipBuffers = 0;
   unsigned int num_cliprects;
   struct drm_clip_rect *cliprects;
   int x_off, y_off;
   BATCH_LOCALS;

   /*
    * Compute values for clearing the buffers.
    */
   clear_depth = 0;
   if (mask & BUFFER_BIT_DEPTH) {
      clear_depth = (GLuint) (fb->_DepthMax * ctx->Depth.Clear);
   }
   if (mask & BUFFER_BIT_STENCIL) {
      clear_depth |= (ctx->Stencil.Clear & 0xff) << 24;
   }

   /* If clearing both depth and stencil, skip BUFFER_BIT_STENCIL in
    * the loop below.
    */
   if ((mask & BUFFER_BIT_DEPTH) && (mask & BUFFER_BIT_STENCIL)) {
      skipBuffers = BUFFER_BIT_STENCIL;
   }

   LOCK_HARDWARE(intel);

   intel_get_cliprects(intel, &cliprects, &num_cliprects, &x_off, &y_off);
   if (num_cliprects) {
      GLint cx, cy, cw, ch;
      drm_clip_rect_t clear;
      int i;

      /* Get clear bounds after locking */
      cx = fb->_Xmin;
      cy = fb->_Ymin;
      cw = fb->_Xmax - cx;
      ch = fb->_Ymax - cy;

      if (fb->Name == 0) {
         /* clearing a window */

         /* flip top to bottom */
         clear.x1 = cx + x_off;
         clear.y1 = intel->driDrawable->y + intel->driDrawable->h - cy - ch;
         clear.x2 = clear.x1 + cw;
         clear.y2 = clear.y1 + ch;
      }
      else {
         /* clearing FBO */
         assert(num_cliprects == 1);
         assert(cliprects == &intel->fboRect);
         clear.x1 = cx;
         clear.y1 = cy;
         clear.x2 = clear.x1 + cw;
         clear.y2 = clear.y1 + ch;
         /* no change to mask */
      }

      for (i = 0; i < num_cliprects; i++) {
         const drm_clip_rect_t *box = &cliprects[i];
         drm_clip_rect_t b;
         GLuint buf;
         GLuint clearMask = mask;      /* use copy, since we modify it below */
         GLboolean all = (cw == fb->Width && ch == fb->Height);

         if (!all) {
            intel_intersect_cliprects(&b, &clear, box);
         }
         else {
            b = *box;
         }

         if (b.x1 >= b.x2 || b.y1 >= b.y2)
            continue;

         if (0)
            _mesa_printf("clear %d,%d..%d,%d, mask %x\n",
                         b.x1, b.y1, b.x2, b.y2, mask);

         /* Loop over all renderbuffers */
         for (buf = 0; buf < BUFFER_COUNT && clearMask; buf++) {
            const GLbitfield bufBit = 1 << buf;
            if ((clearMask & bufBit) && !(bufBit & skipBuffers)) {
               /* OK, clear this renderbuffer */
	       struct intel_renderbuffer *irb = intel_get_renderbuffer(fb, buf);
               dri_bo *write_buffer =
                  intel_region_buffer(intel, irb->region,
                                      all ? INTEL_WRITE_FULL :
                                      INTEL_WRITE_PART);
	       int x1 = b.x1 + irb->region->draw_x;
	       int y1 = b.y1 + irb->region->draw_y;
	       int x2 = b.x2 + irb->region->draw_x;
	       int y2 = b.y2 + irb->region->draw_y;

               GLuint clearVal;
               GLint pitch, cpp;
               GLuint BR13, CMD;

               pitch = irb->region->pitch;
               cpp = irb->region->cpp;

               DBG("%s dst:buf(%p)/%d %d,%d sz:%dx%d\n",
                   __FUNCTION__,
                   irb->region->buffer, (pitch * cpp),
                   x1, y1, x2 - x1, y2 - y1);

	       BR13 = 0xf0 << 16;
	       CMD = XY_COLOR_BLT_CMD;

               /* Setup the blit command */
               if (cpp == 4) {
                  BR13 |= BR13_8888;
                  if (buf == BUFFER_DEPTH || buf == BUFFER_STENCIL) {
                     if (clearMask & BUFFER_BIT_DEPTH)
                        CMD |= XY_BLT_WRITE_RGB;
                     if (clearMask & BUFFER_BIT_STENCIL)
                        CMD |= XY_BLT_WRITE_ALPHA;
                  }
                  else {
                     /* clearing RGBA */
                     CMD |= XY_BLT_WRITE_ALPHA | XY_BLT_WRITE_RGB;
                  }
               }
               else {
                  ASSERT(cpp == 2);
                  BR13 |= BR13_565;
               }

	       assert(irb->region->tiling != I915_TILING_Y);

#ifndef I915
	       if (irb->region->tiling != I915_TILING_NONE) {
		  CMD |= XY_DST_TILED;
		  pitch /= 4;
	       }
#endif
	       BR13 |= (pitch * cpp);

               if (buf == BUFFER_DEPTH || buf == BUFFER_STENCIL) {
                  clearVal = clear_depth;
               }
               else {
		  uint8_t clear[4];
		  GLclampf *color = ctx->Color.ClearColor;

		  CLAMPED_FLOAT_TO_UBYTE(clear[0], color[0]);
		  CLAMPED_FLOAT_TO_UBYTE(clear[1], color[1]);
		  CLAMPED_FLOAT_TO_UBYTE(clear[2], color[2]);
		  CLAMPED_FLOAT_TO_UBYTE(clear[3], color[3]);

		  switch (irb->texformat) {
		  case MESA_FORMAT_ARGB8888:
		  case MESA_FORMAT_XRGB8888:
		     clearVal = PACK_COLOR_8888(clear[3], clear[0],
						clear[1], clear[2]);
		     break;
		  case MESA_FORMAT_RGB565:
		     clearVal = PACK_COLOR_565(clear[0], clear[1], clear[2]);
		     break;
		  case MESA_FORMAT_ARGB4444:
		     clearVal = PACK_COLOR_4444(clear[3], clear[0],
						clear[1], clear[2]);
		     break;
		  case MESA_FORMAT_ARGB1555:
		     clearVal = PACK_COLOR_1555(clear[3], clear[0],
						clear[1], clear[2]);
		     break;
		  default:
		     _mesa_problem(ctx, "Unexpected renderbuffer format: %d\n",
				   irb->texformat);
		     clearVal = 0;
		  }
	       }

               /*
                  _mesa_debug(ctx, "hardware blit clear buf %d rb id %d\n",
                  buf, irb->Base.Name);
                */

               assert(x1 < x2);
               assert(y1 < y2);

               BEGIN_BATCH(6, REFERENCES_CLIPRECTS);
               OUT_BATCH(CMD);
               OUT_BATCH(BR13);
               OUT_BATCH((y1 << 16) | x1);
               OUT_BATCH((y2 << 16) | x2);
               OUT_RELOC(write_buffer,
			 I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER,
                         0);
               OUT_BATCH(clearVal);
               ADVANCE_BATCH();
               clearMask &= ~bufBit;    /* turn off bit, for faster loop exit */
            }
         }
      }
   }

   UNLOCK_HARDWARE(intel);
}

GLboolean
intelEmitImmediateColorExpandBlit(struct intel_context *intel,
				  GLuint cpp,
				  GLubyte *src_bits, GLuint src_size,
				  GLuint fg_color,
				  GLshort dst_pitch,
				  dri_bo *dst_buffer,
				  GLuint dst_offset,
				  uint32_t dst_tiling,
				  GLshort x, GLshort y,
				  GLshort w, GLshort h,
				  GLenum logic_op)
{
   int dwords = ALIGN(src_size, 8) / 4;
   uint32_t opcode, br13, blit_cmd;

   if (dst_tiling != I915_TILING_NONE) {
      if (dst_offset & 4095)
	 return GL_FALSE;
      if (dst_tiling == I915_TILING_Y)
	 return GL_FALSE;
   }

   assert( logic_op - GL_CLEAR >= 0 );
   assert( logic_op - GL_CLEAR < 0x10 );
   assert(dst_pitch > 0);

   if (w < 0 || h < 0)
      return GL_TRUE;

   dst_pitch *= cpp;

   DBG("%s dst:buf(%p)/%d+%d %d,%d sz:%dx%d, %d bytes %d dwords\n",
       __FUNCTION__,
       dst_buffer, dst_pitch, dst_offset, x, y, w, h, src_size, dwords);

   intel_batchbuffer_require_space( intel->batch,
				    (8 * 4) +
				    (3 * 4) +
				    dwords * 4,
				    REFERENCES_CLIPRECTS );

   opcode = XY_SETUP_BLT_CMD;
   if (cpp == 4)
      opcode |= XY_BLT_WRITE_ALPHA | XY_BLT_WRITE_RGB;
#ifndef I915
   if (dst_tiling != I915_TILING_NONE) {
      opcode |= XY_DST_TILED;
      dst_pitch /= 4;
   }
#endif

   br13 = dst_pitch | (translate_raster_op(logic_op) << 16) | (1 << 29);
   if (cpp == 2)
      br13 |= BR13_565;
   else
      br13 |= BR13_8888;

   blit_cmd = XY_TEXT_IMMEDIATE_BLIT_CMD | XY_TEXT_BYTE_PACKED; /* packing? */
   if (dst_tiling != I915_TILING_NONE)
      blit_cmd |= XY_DST_TILED;

   BEGIN_BATCH(8 + 3, REFERENCES_CLIPRECTS);
   OUT_BATCH(opcode);
   OUT_BATCH(br13);
   OUT_BATCH((0 << 16) | 0); /* clip x1, y1 */
   OUT_BATCH((100 << 16) | 100); /* clip x2, y2 */
   OUT_RELOC(dst_buffer,
	     I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER,
	     dst_offset);
   OUT_BATCH(0); /* bg */
   OUT_BATCH(fg_color); /* fg */
   OUT_BATCH(0); /* pattern base addr */

   OUT_BATCH(blit_cmd | ((3 - 2) + dwords));
   OUT_BATCH((y << 16) | x);
   OUT_BATCH(((y + h) << 16) | (x + w));
   ADVANCE_BATCH();

   intel_batchbuffer_data( intel->batch,
			   src_bits,
			   dwords * 4,
			   REFERENCES_CLIPRECTS );

   intel_batchbuffer_emit_mi_flush(intel->batch);

   return GL_TRUE;
}

/* We don't have a memmove-type blit like some other hardware, so we'll do a
 * rectangular blit covering a large space, then emit 1-scanline blit at the
 * end to cover the last if we need.
 */
void
intel_emit_linear_blit(struct intel_context *intel,
		       drm_intel_bo *dst_bo,
		       unsigned int dst_offset,
		       drm_intel_bo *src_bo,
		       unsigned int src_offset,
		       unsigned int size)
{
   GLuint pitch, height;

   /* The pitch is a signed value. */
   pitch = MIN2(size, (1 << 15) - 1);
   height = size / pitch;
   intelEmitCopyBlit(intel, 1,
		     pitch, src_bo, src_offset, I915_TILING_NONE,
		     pitch, dst_bo, dst_offset, I915_TILING_NONE,
		     0, 0, /* src x/y */
		     0, 0, /* dst x/y */
		     pitch, height, /* w, h */
		     GL_COPY);

   src_offset += pitch * height;
   dst_offset += pitch * height;
   size -= pitch * height;
   assert (size < (1 << 15));
   if (size != 0) {
      intelEmitCopyBlit(intel, 1,
			size, src_bo, src_offset, I915_TILING_NONE,
			size, dst_bo, dst_offset, I915_TILING_NONE,
			0, 0, /* src x/y */
			0, 0, /* dst x/y */
			size, 1, /* w, h */
			GL_COPY);
   }
}