summaryrefslogtreecommitdiff
path: root/OptionRomPkg/Library/FrameBufferBltLib/FrameBufferBltLib.c
blob: dd54b0799b26676542d7c5b530b7b7174b0296a5 (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
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
/** @file
  FrameBufferBltLib - Library to perform blt operations on a frame buffer.

  Copyright (c) 2007 - 2011, Intel Corporation
  All rights reserved. This program and the accompanying materials
  are licensed and made available under the terms and conditions of the BSD License
  which accompanies this distribution.  The full text of the license may be found at
  http://opensource.org/licenses/bsd-license.php
  
  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/

#include "PiDxe.h"
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/BltLib.h>
#include <Library/DebugLib.h>

#if 0
#define VDEBUG DEBUG
#else
#define VDEBUG(x)
#endif

#define MAX_LINE_BUFFER_SIZE (SIZE_4KB * sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL))

UINTN                           mBltLibColorDepth;
UINTN                           mBltLibWidthInBytes;
UINTN                           mBltLibBytesPerPixel;
UINTN                           mBltLibWidthInPixels;
UINTN                           mBltLibHeight;
UINT8                           mBltLibLineBuffer[MAX_LINE_BUFFER_SIZE];
UINT8                           *mBltLibFrameBuffer;
EFI_GRAPHICS_PIXEL_FORMAT       mPixelFormat;
EFI_PIXEL_BITMASK               mPixelBitMasks;
INTN                            mPixelShl[4]; // R-G-B-Rsvd
INTN                            mPixelShr[4]; // R-G-B-Rsvd


VOID
ConfigurePixelBitMaskFormat (
  IN EFI_PIXEL_BITMASK          *BitMask
  )
{
  UINTN   Loop;
  UINT32  *Masks;
  UINT32  MergedMasks;

  MergedMasks = 0;
  Masks = (UINT32*) BitMask;
  for (Loop = 0; Loop < 3; Loop++) {
    ASSERT ((Loop == 3) || (Masks[Loop] != 0));
    ASSERT ((MergedMasks & Masks[Loop]) == 0);
    mPixelShl[Loop] = HighBitSet32 (Masks[Loop]) - 23 + (Loop * 8);
    if (mPixelShl[Loop] < 0) {
      mPixelShr[Loop] = -mPixelShl[Loop];
      mPixelShl[Loop] = 0;
    } else {
      mPixelShr[Loop] = 0;
    }
    MergedMasks = (UINT32) (MergedMasks | Masks[Loop]);
    DEBUG ((EFI_D_INFO, "%d: shl:%d shr:%d mask:%x\n", Loop, mPixelShl[Loop], mPixelShr[Loop], Masks[Loop]));
  }
  MergedMasks = (UINT32) (MergedMasks | Masks[3]);

  mBltLibBytesPerPixel = HighBitSet32 (MergedMasks);
  ASSERT (mBltLibBytesPerPixel >= 0);
  mBltLibBytesPerPixel = (mBltLibBytesPerPixel + 7) / 8;

  DEBUG ((EFI_D_INFO, "Bytes per pixel: %d\n", mBltLibBytesPerPixel));

  CopyMem (&mPixelBitMasks, BitMask, sizeof (*BitMask));
}


/**
  Configure the FrameBufferLib instance

  @param[in] FrameBuffer      Pointer to the start of the frame buffer
  @param[in] FrameBufferInfo  Describes the frame buffer characteristics

  @retval  EFI_INVALID_PARAMETER - Invalid parameter
  @retval  EFI_UNSUPPORTED - The BltLib does not support this configuration
  @retval  EFI_SUCCESS - Blt operation success

**/
EFI_STATUS
EFIAPI
BltLibConfigure (
  IN  VOID                                 *FrameBuffer,
  IN  EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *FrameBufferInfo
  )
{
  STATIC EFI_PIXEL_BITMASK  RgbPixelMasks =
    { 0x000000ff, 0x0000ff00, 0x00ff0000, 0xff000000 };
  STATIC EFI_PIXEL_BITMASK  BgrPixelMasks =
    { 0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000 };

  switch (FrameBufferInfo->PixelFormat) {
  case PixelRedGreenBlueReserved8BitPerColor:
    ConfigurePixelBitMaskFormat (&RgbPixelMasks);
    break;
  case PixelBlueGreenRedReserved8BitPerColor:
    ConfigurePixelBitMaskFormat (&BgrPixelMasks);
    break;
  case PixelBitMask:
    ConfigurePixelBitMaskFormat (&(FrameBufferInfo->PixelInformation));
    break;
  case PixelBltOnly:
    ASSERT (FrameBufferInfo->PixelFormat != PixelBltOnly);
    return EFI_UNSUPPORTED;
  default:
    ASSERT (FALSE);
    return EFI_INVALID_PARAMETER;
  }
  mPixelFormat = FrameBufferInfo->PixelFormat;

  mBltLibFrameBuffer = (UINT8*) FrameBuffer;
  mBltLibWidthInPixels = (UINTN) FrameBufferInfo->HorizontalResolution;
  mBltLibHeight = (UINTN) FrameBufferInfo->VerticalResolution;
  mBltLibWidthInBytes = mBltLibWidthInPixels * mBltLibBytesPerPixel;

  ASSERT (mBltLibWidthInBytes < sizeof (mBltLibLineBuffer));

  return EFI_SUCCESS;
}


/**
  Performs a UEFI Graphics Output Protocol Blt operation.

  @param[in,out] BltBuffer     - The data to transfer to screen
  @param[in]     BltOperation  - The operation to perform
  @param[in]     SourceX       - The X coordinate of the source for BltOperation
  @param[in]     SourceY       - The Y coordinate of the source for BltOperation
  @param[in]     DestinationX  - The X coordinate of the destination for BltOperation
  @param[in]     DestinationY  - The Y coordinate of the destination for BltOperation
  @param[in]     Width         - The width of a rectangle in the blt rectangle in pixels
  @param[in]     Height        - The height of a rectangle in the blt rectangle in pixels
  @param[in]     Delta         - Not used for EfiBltVideoFill and EfiBltVideoToVideo operation.
                                 If a Delta of 0 is used, the entire BltBuffer will be operated on.
                                 If a subrectangle of the BltBuffer is used, then Delta represents
                                 the number of bytes in a row of the BltBuffer.

  @retval  EFI_DEVICE_ERROR - A hardware error occured
  @retval  EFI_INVALID_PARAMETER - Invalid parameter passed in
  @retval  EFI_SUCCESS - Blt operation success

**/
EFI_STATUS
EFIAPI
BltLibGopBlt (
  IN  EFI_GRAPHICS_OUTPUT_BLT_PIXEL         *BltBuffer, OPTIONAL
  IN  EFI_GRAPHICS_OUTPUT_BLT_OPERATION     BltOperation,
  IN  UINTN                                 SourceX,
  IN  UINTN                                 SourceY,
  IN  UINTN                                 DestinationX,
  IN  UINTN                                 DestinationY,
  IN  UINTN                                 Width,
  IN  UINTN                                 Height,
  IN  UINTN                                 Delta
  )
{
  switch (BltOperation) {
  case EfiBltVideoToBltBuffer:
    return BltLibVideoToBltBufferEx (
             BltBuffer,
             SourceX,
             SourceY,
             DestinationX,
             DestinationY,
             Width,
             Height,
             Delta
             );

  case EfiBltVideoToVideo:
    return BltLibVideoToVideo (
             SourceX,
             SourceY,
             DestinationX,
             DestinationY,
             Width,
             Height
             );

  case EfiBltVideoFill:
    return BltLibVideoFill (
             BltBuffer,
             DestinationX,
             DestinationY,
             Width,
             Height
             );

  case EfiBltBufferToVideo:
    return BltLibBufferToVideoEx (
             BltBuffer,
             SourceX,
             SourceY,
             DestinationX,
             DestinationY,
             Width,
             Height,
             Delta
             );
  default:
    return EFI_INVALID_PARAMETER;
  }
}


/**
  Performs a UEFI Graphics Output Protocol Blt Video Fill.

  @param[in]  Color         Color to fill the region with
  @param[in]  DestinationX  X location to start fill operation
  @param[in]  DestinationY  Y location to start fill operation
  @param[in]  Width         Width (in pixels) to fill
  @param[in]  Height        Height to fill

  @retval  EFI_DEVICE_ERROR - A hardware error occured
  @retval  EFI_INVALID_PARAMETER - Invalid parameter passed in
  @retval  EFI_SUCCESS - The sizes were returned

**/
EFI_STATUS
EFIAPI
BltLibVideoFill (
  IN  EFI_GRAPHICS_OUTPUT_BLT_PIXEL         *Color,
  IN  UINTN                                 DestinationX,
  IN  UINTN                                 DestinationY,
  IN  UINTN                                 Width,
  IN  UINTN                                 Height
  )
{
  UINTN                           DstY;
  VOID                            *BltMemSrc;
  VOID                            *BltMemDst;
  UINTN                           X;
  UINT8                           Uint8;
  UINT32                          Uint32;
  UINT64                          WideFill;
  BOOLEAN                         UseWideFill;
  BOOLEAN                         LineBufferReady;
  UINTN                           Offset;
  UINTN                           WidthInBytes;
  UINTN                           SizeInBytes;

  //
  // BltBuffer to Video: Source is BltBuffer, destination is Video
  //
  if (DestinationY + Height > mBltLibHeight) {
    DEBUG ((EFI_D_INFO, "VideoFill: Past screen (Y)\n"));
    return EFI_INVALID_PARAMETER;
  }

  if (DestinationX + Width > mBltLibWidthInPixels) {
    DEBUG ((EFI_D_INFO, "VideoFill: Past screen (X)\n"));
    return EFI_INVALID_PARAMETER;
  }

  if (Width == 0 || Height == 0) {
    DEBUG ((EFI_D_INFO, "VideoFill: Width or Height is 0\n"));
    return EFI_INVALID_PARAMETER;
  }

  WidthInBytes = Width * mBltLibBytesPerPixel;

  Uint32 = *(UINT32*) Color;
  WideFill =
    (UINT32) (
        (((Uint32 << mPixelShl[0]) >> mPixelShr[0]) & mPixelBitMasks.RedMask) |
        (((Uint32 << mPixelShl[1]) >> mPixelShr[1]) & mPixelBitMasks.GreenMask) |
        (((Uint32 << mPixelShl[2]) >> mPixelShr[2]) & mPixelBitMasks.BlueMask)
      );
  VDEBUG ((EFI_D_INFO, "VideoFill: color=0x%x, wide-fill=0x%x\n", Uint32, WideFill));

  //
  // If the size of the pixel data evenly divides the sizeof
  // WideFill, then a wide fill operation can be used
  //
  UseWideFill = TRUE;
  if ((sizeof (WideFill) % mBltLibBytesPerPixel) == 0) {
    for (X = mBltLibBytesPerPixel; X < sizeof (WideFill); X++) {
      ((UINT8*)&WideFill)[X] = ((UINT8*)&WideFill)[X % mBltLibBytesPerPixel];
    }
  } else {
    //
    // If all the bytes in the pixel are the same value, then use
    // a wide fill operation.
    //
    for (
      X = 1, Uint8 = ((UINT8*)&WideFill)[0];
      X < mBltLibBytesPerPixel;
      X++) {
      if (Uint8 != ((UINT8*)&WideFill)[X]) {
        UseWideFill = FALSE;
        break;
      }
    }
    if (UseWideFill) {
      SetMem ((VOID*) &WideFill, sizeof (WideFill), Uint8);
    }
  }

  if (UseWideFill && (DestinationX == 0) && (Width == mBltLibWidthInPixels)) {
    VDEBUG ((EFI_D_INFO, "VideoFill (wide, one-shot)\n"));
    Offset = DestinationY * mBltLibWidthInPixels;
    Offset = mBltLibBytesPerPixel * Offset;
    BltMemDst = (VOID*) (mBltLibFrameBuffer + Offset);
    SizeInBytes = WidthInBytes * Height;
    if (SizeInBytes >= 8) {
      SetMem32 (BltMemDst, SizeInBytes & ~3, (UINT32) WideFill);
      SizeInBytes = SizeInBytes & 3;
    }
    if (SizeInBytes > 0) {
      SetMem (BltMemDst, SizeInBytes, (UINT8)(UINTN) WideFill);
    }
  } else {
    LineBufferReady = FALSE;
    for (DstY = DestinationY; DstY < (Height + DestinationY); DstY++) {
      Offset = (DstY * mBltLibWidthInPixels) + DestinationX;
      Offset = mBltLibBytesPerPixel * Offset;
      BltMemDst = (VOID*) (mBltLibFrameBuffer + Offset);

      if (UseWideFill && (((UINTN) BltMemDst & 7) == 0)) {
        VDEBUG ((EFI_D_INFO, "VideoFill (wide)\n"));
        SizeInBytes = WidthInBytes;
        if (SizeInBytes >= 8) {
          SetMem64 (BltMemDst, SizeInBytes & ~7, WideFill);
          SizeInBytes = SizeInBytes & 7;
        }
        if (SizeInBytes > 0) {
          CopyMem (BltMemDst, (VOID*) &WideFill, SizeInBytes);
        }
      } else {
        VDEBUG ((EFI_D_INFO, "VideoFill (not wide)\n"));
        if (!LineBufferReady) {
          CopyMem (mBltLibLineBuffer, &WideFill, mBltLibBytesPerPixel);
          for (X = 1; X < Width; ) {
            CopyMem(
              (mBltLibLineBuffer + (X * mBltLibBytesPerPixel)),
              mBltLibLineBuffer,
              MIN (X, Width - X) * mBltLibBytesPerPixel
              );
            X = X + MIN (X, Width - X);
          }
          BltMemSrc = (VOID *) mBltLibLineBuffer;
          LineBufferReady = TRUE;
        }
        CopyMem (BltMemDst, mBltLibLineBuffer, WidthInBytes);
      }
    }
  }

  return EFI_SUCCESS;
}


/**
  Performs a UEFI Graphics Output Protocol Blt Video to Buffer operation.

  @param[out] BltBuffer     Output buffer for pixel color data
  @param[in]  SourceX       X location within video
  @param[in]  SourceY       Y location within video
  @param[in]  Width         Width (in pixels)
  @param[in]  Height        Height

  @retval  EFI_DEVICE_ERROR - A hardware error occured
  @retval  EFI_INVALID_PARAMETER - Invalid parameter passed in
  @retval  EFI_SUCCESS - The sizes were returned

**/
EFI_STATUS
EFIAPI
BltLibVideoToBltBuffer (
  OUT EFI_GRAPHICS_OUTPUT_BLT_PIXEL         *BltBuffer,
  IN  UINTN                                 SourceX,
  IN  UINTN                                 SourceY,
  IN  UINTN                                 Width,
  IN  UINTN                                 Height
  )
{
  return BltLibVideoToBltBufferEx (
           BltBuffer,
           SourceX,
           SourceY,
           0,
           0,
           Width,
           Height,
           0
           );
}


/**
  Performs a UEFI Graphics Output Protocol Blt Video to Buffer operation
  with extended parameters.

  @param[out] BltBuffer     Output buffer for pixel color data
  @param[in]  SourceX       X location within video
  @param[in]  SourceY       Y location within video
  @param[in]  DestinationX  X location within BltBuffer
  @param[in]  DestinationY  Y location within BltBuffer
  @param[in]  Width         Width (in pixels)
  @param[in]  Height        Height
  @param[in]  Delta         Number of bytes in a row of BltBuffer

  @retval  EFI_DEVICE_ERROR - A hardware error occured
  @retval  EFI_INVALID_PARAMETER - Invalid parameter passed in
  @retval  EFI_SUCCESS - The sizes were returned

**/
EFI_STATUS
EFIAPI
BltLibVideoToBltBufferEx (
  OUT EFI_GRAPHICS_OUTPUT_BLT_PIXEL         *BltBuffer,
  IN  UINTN                                 SourceX,
  IN  UINTN                                 SourceY,
  IN  UINTN                                 DestinationX,
  IN  UINTN                                 DestinationY,
  IN  UINTN                                 Width,
  IN  UINTN                                 Height,
  IN  UINTN                                 Delta
  )
{
  UINTN                           DstY;
  UINTN                           SrcY;
  EFI_GRAPHICS_OUTPUT_BLT_PIXEL   *Blt;
  VOID                            *BltMemSrc;
  VOID                            *BltMemDst;
  UINTN                           X;
  UINT32                          Uint32;
  UINTN                           Offset;
  UINTN                           WidthInBytes;

  //
  // Video to BltBuffer: Source is Video, destination is BltBuffer
  //
  if (SourceY + Height > mBltLibHeight) {
    return EFI_INVALID_PARAMETER;
  }

  if (SourceX + Width > mBltLibWidthInPixels) {
    return EFI_INVALID_PARAMETER;
  }

  if (Width == 0 || Height == 0) {
    return EFI_INVALID_PARAMETER;
  }

  //
  // If Delta is zero, then the entire BltBuffer is being used, so Delta
  // is the number of bytes in each row of BltBuffer.  Since BltBuffer is Width pixels size,
  // the number of bytes in each row can be computed.
  //
  if (Delta == 0) {
    Delta = Width * sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL);
  }

  WidthInBytes = Width * mBltLibBytesPerPixel;

  //
  // Video to BltBuffer: Source is Video, destination is BltBuffer
  //
  for (SrcY = SourceY, DstY = DestinationY; DstY < (Height + DestinationY); SrcY++, DstY++) {

    Offset = (SrcY * mBltLibWidthInPixels) + SourceX;
    Offset = mBltLibBytesPerPixel * Offset;
    BltMemSrc = (VOID *) (mBltLibFrameBuffer + Offset);

    if (mPixelFormat == PixelBlueGreenRedReserved8BitPerColor) {
      BltMemDst =
        (VOID *) (
            (UINT8 *) BltBuffer +
            (DstY * Delta) +
            (DestinationX * sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL))
          );
    } else {
      BltMemDst = (VOID *) mBltLibLineBuffer;
    }

    CopyMem (BltMemDst, BltMemSrc, WidthInBytes);

    if (mPixelFormat != PixelBlueGreenRedReserved8BitPerColor) {
      for (X = 0; X < Width; X++) {
        Blt         = (EFI_GRAPHICS_OUTPUT_BLT_PIXEL *) ((UINT8 *) BltBuffer + (DstY * Delta) + (DestinationX + X) * sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL));
        Uint32 = *(UINT32*) (mBltLibLineBuffer + (X * mBltLibBytesPerPixel));
        *(UINT32*) Blt =
          (UINT32) (
              (((Uint32 & mPixelBitMasks.RedMask)   >> mPixelShl[0]) << mPixelShr[0]) |
              (((Uint32 & mPixelBitMasks.GreenMask) >> mPixelShl[1]) << mPixelShr[1]) |
              (((Uint32 & mPixelBitMasks.BlueMask)  >> mPixelShl[2]) << mPixelShr[2])
            );
      }
    }
  }

  return EFI_SUCCESS;
}


/**
  Performs a UEFI Graphics Output Protocol Blt Buffer to Video operation.

  @param[in]  BltBuffer     Output buffer for pixel color data
  @param[in]  DestinationX  X location within video
  @param[in]  DestinationY  Y location within video
  @param[in]  Width         Width (in pixels)
  @param[in]  Height        Height

  @retval  EFI_DEVICE_ERROR - A hardware error occured
  @retval  EFI_INVALID_PARAMETER - Invalid parameter passed in
  @retval  EFI_SUCCESS - The sizes were returned

**/
EFI_STATUS
EFIAPI
BltLibBufferToVideo (
  IN  EFI_GRAPHICS_OUTPUT_BLT_PIXEL         *BltBuffer,
  IN  UINTN                                 DestinationX,
  IN  UINTN                                 DestinationY,
  IN  UINTN                                 Width,
  IN  UINTN                                 Height
  )
{
  return BltLibBufferToVideoEx (
           BltBuffer,
           0,
           0,
           DestinationX,
           DestinationY,
           Width,
           Height,
           0
           );
}


/**
  Performs a UEFI Graphics Output Protocol Blt Buffer to Video operation
  with extended parameters.

  @param[in]  BltBuffer     Output buffer for pixel color data
  @param[in]  SourceX       X location within BltBuffer
  @param[in]  SourceY       Y location within BltBuffer
  @param[in]  DestinationX  X location within video
  @param[in]  DestinationY  Y location within video
  @param[in]  Width         Width (in pixels)
  @param[in]  Height        Height
  @param[in]  Delta         Number of bytes in a row of BltBuffer

  @retval  EFI_DEVICE_ERROR - A hardware error occured
  @retval  EFI_INVALID_PARAMETER - Invalid parameter passed in
  @retval  EFI_SUCCESS - The sizes were returned

**/
EFI_STATUS
EFIAPI
BltLibBufferToVideoEx (
  IN  EFI_GRAPHICS_OUTPUT_BLT_PIXEL         *BltBuffer,
  IN  UINTN                                 SourceX,
  IN  UINTN                                 SourceY,
  IN  UINTN                                 DestinationX,
  IN  UINTN                                 DestinationY,
  IN  UINTN                                 Width,
  IN  UINTN                                 Height,
  IN  UINTN                                 Delta
  )
{
  UINTN                           DstY;
  UINTN                           SrcY;
  EFI_GRAPHICS_OUTPUT_BLT_PIXEL   *Blt;
  VOID                            *BltMemSrc;
  VOID                            *BltMemDst;
  UINTN                           X;
  UINT32                          Uint32;
  UINTN                           Offset;
  UINTN                           WidthInBytes;

  //
  // BltBuffer to Video: Source is BltBuffer, destination is Video
  //
  if (DestinationY + Height > mBltLibHeight) {
    return EFI_INVALID_PARAMETER;
  }

  if (DestinationX + Width > mBltLibWidthInPixels) {
    return EFI_INVALID_PARAMETER;
  }

  if (Width == 0 || Height == 0) {
    return EFI_INVALID_PARAMETER;
  }

  //
  // If Delta is zero, then the entire BltBuffer is being used, so Delta
  // is the number of bytes in each row of BltBuffer.  Since BltBuffer is Width pixels size,
  // the number of bytes in each row can be computed.
  //
  if (Delta == 0) {
    Delta = Width * sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL);
  }

  WidthInBytes = Width * mBltLibBytesPerPixel;

  for (SrcY = SourceY, DstY = DestinationY; SrcY < (Height + SourceY); SrcY++, DstY++) {

    Offset = (DstY * mBltLibWidthInPixels) + DestinationX;
    Offset = mBltLibBytesPerPixel * Offset;
    BltMemDst = (VOID*) (mBltLibFrameBuffer + Offset);

    if (mPixelFormat == PixelBlueGreenRedReserved8BitPerColor) {
      BltMemSrc = (VOID *) (UINT8 *) BltBuffer + (SrcY * Delta);
    } else {
      for (X = 0; X < Width; X++) {
        Blt =
          (EFI_GRAPHICS_OUTPUT_BLT_PIXEL *) (
              (UINT8 *) BltBuffer +
              (SrcY * Delta) +
              ((SourceX + X) * sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL))
            );
        Uint32 = *(UINT32*) Blt;
        *(UINT32*) (mBltLibLineBuffer + (X * mBltLibBytesPerPixel)) =
          (UINT32) (
              (((Uint32 << mPixelShl[0]) >> mPixelShr[0]) & mPixelBitMasks.RedMask) |
              (((Uint32 << mPixelShl[1]) >> mPixelShr[1]) & mPixelBitMasks.GreenMask) |
              (((Uint32 << mPixelShl[2]) >> mPixelShr[2]) & mPixelBitMasks.BlueMask)
            );
      }
      BltMemSrc = (VOID *) mBltLibLineBuffer;
    }

    CopyMem (BltMemDst, BltMemSrc, WidthInBytes);
  }

  return EFI_SUCCESS;
}


/**
  Performs a UEFI Graphics Output Protocol Blt Video to Video operation

  @param[in]  SourceX       X location within video
  @param[in]  SourceY       Y location within video
  @param[in]  DestinationX  X location within video
  @param[in]  DestinationY  Y location within video
  @param[in]  Width         Width (in pixels)
  @param[in]  Height        Height

  @retval  EFI_DEVICE_ERROR - A hardware error occured
  @retval  EFI_INVALID_PARAMETER - Invalid parameter passed in
  @retval  EFI_SUCCESS - The sizes were returned

**/
EFI_STATUS
EFIAPI
BltLibVideoToVideo (
  IN  UINTN                                 SourceX,
  IN  UINTN                                 SourceY,
  IN  UINTN                                 DestinationX,
  IN  UINTN                                 DestinationY,
  IN  UINTN                                 Width,
  IN  UINTN                                 Height
  )
{
  VOID                            *BltMemSrc;
  VOID                            *BltMemDst;
  UINTN                           Offset;
  UINTN                           WidthInBytes;
  INTN                            LineStride;

  //
  // Video to Video: Source is Video, destination is Video
  //
  if (SourceY + Height > mBltLibHeight) {
    return EFI_INVALID_PARAMETER;
  }

  if (SourceX + Width > mBltLibWidthInPixels) {
    return EFI_INVALID_PARAMETER;
  }

  if (DestinationY + Height > mBltLibHeight) {
    return EFI_INVALID_PARAMETER;
  }

  if (DestinationX + Width > mBltLibWidthInPixels) {
    return EFI_INVALID_PARAMETER;
  }

  if (Width == 0 || Height == 0) {
    return EFI_INVALID_PARAMETER;
  }

  WidthInBytes = Width * mBltLibBytesPerPixel;

  Offset = (SourceY * mBltLibWidthInPixels) + SourceX;
  Offset = mBltLibBytesPerPixel * Offset;
  BltMemSrc = (VOID *) (mBltLibFrameBuffer + Offset);

  Offset = (DestinationY * mBltLibWidthInPixels) + DestinationX;
  Offset = mBltLibBytesPerPixel * Offset;
  BltMemDst = (VOID *) (mBltLibFrameBuffer + Offset);

  LineStride = mBltLibWidthInBytes;
  if ((UINTN) BltMemDst > (UINTN) BltMemSrc) {
    LineStride = -LineStride;
  }

  while (Height > 0) {
    CopyMem (BltMemDst, BltMemSrc, WidthInBytes);

    BltMemSrc = (VOID*) ((UINT8*) BltMemSrc + LineStride);
    BltMemDst = (VOID*) ((UINT8*) BltMemDst + LineStride);
    Height--;
  }

  return EFI_SUCCESS;
}


/**
  Returns the sizes related to the video device

  @param[out]  Width   Width (in pixels)
  @param[out]  Height  Height (in pixels)

  @retval  EFI_INVALID_PARAMETER - Invalid parameter passed in
  @retval  EFI_SUCCESS - The sizes were returned

**/
EFI_STATUS
EFIAPI
BltLibGetSizes (
  OUT UINTN                                 *Width,  OPTIONAL
  OUT UINTN                                 *Height  OPTIONAL
  )
{
  if (Width != NULL) {
    *Width = mBltLibWidthInPixels;
  }
  if (Height != NULL) {
    *Height = mBltLibHeight;
  }

  return EFI_SUCCESS;
}