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Side by Side Diff: src/utils/SkTextureCompressor.cpp

Issue 417933005: Add preliminary ASTC encoder (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: Code review changes Created 6 years, 5 months ago
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1 /* 1 /*
2 * Copyright 2014 Google Inc. 2 * Copyright 2014 Google Inc.
3 * 3 *
4 * Use of this source code is governed by a BSD-style license that can be 4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file. 5 * found in the LICENSE file.
6 */ 6 */
7 7
8 #include "SkTextureCompressor.h" 8 #include "SkTextureCompressor.h"
9 #include "SkTextureCompressor_ASTC.h"
10 #include "SkTextureCompressor_LATC.h"
9 #include "SkTextureCompressor_R11EAC.h" 11 #include "SkTextureCompressor_R11EAC.h"
10 #include "SkTextureCompressor_LATC.h"
11 12
12 #include "SkBitmap.h" 13 #include "SkBitmap.h"
13 #include "SkData.h" 14 #include "SkData.h"
14 #include "SkEndian.h" 15 #include "SkEndian.h"
15 16
16 #include "SkTextureCompression_opts.h" 17 #include "SkTextureCompression_opts.h"
17 18
18 //////////////////////////////////////////////////////////////////////////////// 19 ////////////////////////////////////////////////////////////////////////////////
19 20
20 namespace SkTextureCompressor { 21 namespace SkTextureCompressor {
21 22
22 int GetCompressedDataSize(Format fmt, int width, int height) { 23 int GetCompressedDataSize(Format fmt, int width, int height) {
24 int blockDimension = 0;
25 int encodedBlockSize = 0;
26
23 switch (fmt) { 27 switch (fmt) {
24 // These formats are 64 bits per 4x4 block. 28 // These formats are 64 bits per 4x4 block.
25 case kR11_EAC_Format: 29 case kR11_EAC_Format:
26 case kLATC_Format: 30 case kLATC_Format:
27 { 31 blockDimension = 4;
28 static const int kBlockDimension = 4; 32 encodedBlockSize = 8;
29 static const int kEncodedBlockSize = 8; 33 break;
30 34
31 if(((width % kBlockDimension) == 0) && ((height % kBlockDimension) = = 0)) { 35 // This format is 12x12 blocks to 128 bits.
32 36 case kASTC_12x12_Format:
33 const int blocksX = width / kBlockDimension; 37 blockDimension = 12;
34 const int blocksY = height / kBlockDimension; 38 encodedBlockSize = 16;
35 39 break;
36 return blocksX * blocksY * kEncodedBlockSize;
37 }
38
39 return -1;
40 }
41 40
42 default: 41 default:
43 SkFAIL("Unknown compressed format!"); 42 SkFAIL("Unknown compressed format!");
44 return -1; 43 return -1;
45 } 44 }
45
46 if(((width % blockDimension) == 0) && ((height % blockDimension) == 0)) {
47 const int blocksX = width / blockDimension;
48 const int blocksY = height / blockDimension;
49
50 return blocksX * blocksY * encodedBlockSize;
51 }
52
53 return -1;
46 } 54 }
47 55
48 bool CompressBufferToFormat(uint8_t* dst, const uint8_t* src, SkColorType srcCol orType, 56 bool CompressBufferToFormat(uint8_t* dst, const uint8_t* src, SkColorType srcCol orType,
49 int width, int height, int rowBytes, Format format, bool opt) { 57 int width, int height, int rowBytes, Format format, bool opt) {
50 CompressionProc proc = NULL; 58 CompressionProc proc = NULL;
51 if (opt) { 59 if (opt) {
52 proc = SkTextureCompressorGetPlatformProc(srcColorType, format); 60 proc = SkTextureCompressorGetPlatformProc(srcColorType, format);
53 } 61 }
54 62
55 if (NULL == proc) { 63 if (NULL == proc) {
56 switch (srcColorType) { 64 switch (srcColorType) {
57 case kAlpha_8_SkColorType: 65 case kAlpha_8_SkColorType:
58 { 66 {
59 switch (format) { 67 switch (format) {
60 case kLATC_Format: 68 case kLATC_Format:
61 proc = CompressA8ToLATC; 69 proc = CompressA8ToLATC;
62 break; 70 break;
63 case kR11_EAC_Format: 71 case kR11_EAC_Format:
64 proc = CompressA8ToR11EAC; 72 proc = CompressA8ToR11EAC;
65 break; 73 break;
74 case kASTC_12x12_Format:
75 proc = CompressA8To12x12ASTC;
76 break;
66 default: 77 default:
67 // Do nothing... 78 // Do nothing...
68 break; 79 break;
69 } 80 }
70 } 81 }
71 break; 82 break;
72 83
73 default: 84 default:
74 // Do nothing... 85 // Do nothing...
75 break; 86 break;
(...skipping 36 matching lines...) Expand 10 before | Expand all | Expand 10 after
112 return CreateR11EACBlitter(width, height, compressedBuffer); 123 return CreateR11EACBlitter(width, height, compressedBuffer);
113 124
114 default: 125 default:
115 return NULL; 126 return NULL;
116 } 127 }
117 128
118 return NULL; 129 return NULL;
119 } 130 }
120 131
121 } // namespace SkTextureCompressor 132 } // namespace SkTextureCompressor
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