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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 #include "SkImageDecoder_pkm.h" |
8 #include "SkColorPriv.h" | 8 #include "SkColorPriv.h" |
9 #include "SkImageDecoder.h" | |
10 #include "SkScaledBitmapSampler.h" | 9 #include "SkScaledBitmapSampler.h" |
11 #include "SkStream.h" | 10 #include "SkStream.h" |
12 #include "SkStreamPriv.h" | 11 #include "SkStreamPriv.h" |
13 #include "SkTextureCompressor.h" | 12 #include "SkTextureCompressor.h" |
14 #include "SkTypes.h" | 13 #include "SkTypes.h" |
15 | 14 |
16 #include "etc1.h" | 15 #include "etc1.h" |
17 | 16 |
18 class SkPKMImageDecoder : public SkImageDecoder { | 17 class SkPKMImageDecoder : public SkImageDecoder { |
19 public: | 18 public: |
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95 const uint8_t *srcRow = reinterpret_cast<uint8_t *>(outRGBDataPtr); | 94 const uint8_t *srcRow = reinterpret_cast<uint8_t *>(outRGBDataPtr); |
96 srcRow += sampler.srcY0() * srcRowBytes; | 95 srcRow += sampler.srcY0() * srcRowBytes; |
97 for (int y = 0; y < dstHeight; ++y) { | 96 for (int y = 0; y < dstHeight; ++y) { |
98 sampler.next(srcRow); | 97 sampler.next(srcRow); |
99 srcRow += sampler.srcDY() * srcRowBytes; | 98 srcRow += sampler.srcDY() * srcRowBytes; |
100 } | 99 } |
101 | 100 |
102 return kSuccess; | 101 return kSuccess; |
103 } | 102 } |
104 | 103 |
105 ////////////////////////////////////////////////////////////////////////////////
///////// | 104 SkImageDecoder::Format SkDetectFormatPKMImageDecoder(SkStreamRewindable* stream)
{ |
106 DEFINE_DECODER_CREATOR(PKMImageDecoder); | |
107 ////////////////////////////////////////////////////////////////////////////////
///////// | |
108 | |
109 static bool is_pkm(SkStreamRewindable* stream) { | |
110 // Read the PKM header and make sure it's valid. | |
111 unsigned char buf[ETC_PKM_HEADER_SIZE]; | 105 unsigned char buf[ETC_PKM_HEADER_SIZE]; |
112 if (stream->read((void*)buf, ETC_PKM_HEADER_SIZE) != ETC_PKM_HEADER_SIZE) { | 106 if (stream->read((void*)buf, ETC_PKM_HEADER_SIZE) != ETC_PKM_HEADER_SIZE || |
113 return false; | 107 !etc1_pkm_is_valid(buf)) { |
| 108 return SkImageDecoder::kUnknown_Format; |
114 } | 109 } |
115 | 110 return SkImageDecoder::kPKM_Format; |
116 return SkToBool(etc1_pkm_is_valid(buf)); | |
117 } | 111 } |
118 | 112 |
119 static SkImageDecoder* sk_libpkm_dfactory(SkStreamRewindable* stream) { | 113 SkImageDecoder* SkCreatePKMImageDecoder(SkImageDecoder::Format format) { |
120 if (is_pkm(stream)) { | 114 SkASSERT(SkImageDecoder::kPKM_Format == format); |
121 return SkNEW(SkPKMImageDecoder); | 115 return SkNEW(SkPKMImageDecoder); |
122 } | |
123 return NULL; | |
124 } | 116 } |
125 | 117 |
126 static SkImageDecoder_DecodeReg gReg(sk_libpkm_dfactory); | |
127 | |
128 static SkImageDecoder::Format get_format_pkm(SkStreamRewindable* stream) { | |
129 if (is_pkm(stream)) { | |
130 return SkImageDecoder::kPKM_Format; | |
131 } | |
132 return SkImageDecoder::kUnknown_Format; | |
133 } | |
134 | |
135 static SkImageDecoder_FormatReg gFormatReg(get_format_pkm); | |
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