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| 1 /* | |
| 2 * Copyright 2015 Google Inc. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license that can be | |
| 5 * found in the LICENSE file. | |
| 6 */ | |
| 7 | |
| 8 #include "SkScanlineDecoder.h" | |
| 9 #include "SkBmpCodec.h" | |
| 10 #include "SkCodec_libgif.h" | |
| 11 #include "SkCodec_libpng.h" | |
| 12 #include "SkCodec_wbmp.h" | |
| 13 #include "SkCodecPriv.h" | |
| 14 #ifndef SK_BUILD_FOR_ANDROID_FRAMEWORK | |
| 15 #include "SkJpegCodec.h" | |
| 16 #endif | |
| 17 | |
| 18 struct DecoderProc { | |
| 19 bool (*IsFormat)(SkStream*); | |
| 20 SkScanlineDecoder* (*NewFromStream)(SkStream*); | |
| 21 }; | |
| 22 | |
| 23 static const DecoderProc gDecoderProcs[] = { | |
| 24 { SkPngCodec::IsPng, SkPngCodec::NewSDFromStream }, | |
| 25 #ifndef SK_BUILD_FOR_ANDROID_FRAMEWORK | |
| 26 { SkJpegCodec::IsJpeg, SkJpegCodec::NewSDFromStream }, | |
| 27 #endif | |
| 28 { SkGifCodec::IsGif, SkGifCodec::NewSDFromStream }, | |
| 29 { SkBmpCodec::IsBmp, SkBmpCodec::NewSDFromStream }, | |
| 30 { SkWbmpCodec::IsWbmp, SkWbmpCodec::NewSDFromStream }, | |
| 31 }; | |
| 32 | |
| 33 SkScanlineDecoder* SkScanlineDecoder::NewFromStream(SkStream* stream) { | |
| 34 if (!stream) { | |
| 35 return nullptr; | |
| 36 } | |
| 37 | |
| 38 SkAutoTDelete<SkStream> streamDeleter(stream); | |
| 39 | |
| 40 SkAutoTDelete<SkScanlineDecoder> codec(nullptr); | |
| 41 for (uint32_t i = 0; i < SK_ARRAY_COUNT(gDecoderProcs); i++) { | |
| 42 DecoderProc proc = gDecoderProcs[i]; | |
| 43 const bool correctFormat = proc.IsFormat(stream); | |
| 44 if (!stream->rewind()) { | |
| 45 return nullptr; | |
| 46 } | |
| 47 if (correctFormat) { | |
| 48 codec.reset(proc.NewFromStream(streamDeleter.detach())); | |
| 49 break; | |
| 50 } | |
| 51 } | |
| 52 | |
| 53 // Set the max size at 128 megapixels (512 MB for kN32). | |
| 54 // This is about 4x smaller than a test image that takes a few minutes for | |
| 55 // dm to decode and draw. | |
| 56 const int32_t maxSize = 1 << 27; | |
| 57 if (codec && codec->getInfo().width() * codec->getInfo().height() > maxSize)
{ | |
| 58 SkCodecPrintf("Error: Image size too large, cannot decode.\n"); | |
| 59 return nullptr; | |
| 60 } else { | |
| 61 return codec.detach(); | |
| 62 } | |
| 63 } | |
| 64 | |
| 65 SkScanlineDecoder* SkScanlineDecoder::NewFromData(SkData* data) { | |
| 66 if (!data) { | |
| 67 return nullptr; | |
| 68 } | |
| 69 return NewFromStream(new SkMemoryStream(data)); | |
| 70 } | |
| 71 | |
| 72 | |
| 73 SkCodec::Result SkScanlineDecoder::start(const SkImageInfo& dstInfo, | |
| 74 const SkCodec::Options* options, SkPMColor ctable[], int* ctableCount) { | |
| 75 // Ensure that valid color ptrs are passed in for kIndex8 color type | |
| 76 if (kIndex_8_SkColorType == dstInfo.colorType()) { | |
| 77 if (nullptr == ctable || nullptr == ctableCount) { | |
| 78 return SkCodec::kInvalidParameters; | |
| 79 } | |
| 80 } else { | |
| 81 if (ctableCount) { | |
| 82 *ctableCount = 0; | |
| 83 } | |
| 84 ctableCount = nullptr; | |
| 85 ctable = nullptr; | |
| 86 } | |
| 87 | |
| 88 // Set options. | |
| 89 SkCodec::Options optsStorage; | |
| 90 if (nullptr == options) { | |
| 91 options = &optsStorage; | |
| 92 } | |
| 93 | |
| 94 const SkCodec::Result result = this->onStart(dstInfo, *options, ctable, ctab
leCount); | |
| 95 if (result != SkCodec::kSuccess) { | |
| 96 return result; | |
| 97 } | |
| 98 | |
| 99 fCurrScanline = 0; | |
| 100 fDstInfo = dstInfo; | |
| 101 fOptions = *options; | |
| 102 return SkCodec::kSuccess; | |
| 103 } | |
| 104 | |
| 105 SkCodec::Result SkScanlineDecoder::start(const SkImageInfo& dstInfo) { | |
| 106 return this->start(dstInfo, nullptr, nullptr, nullptr); | |
| 107 } | |
| 108 | |
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Chromium Code Reviews
Issue 1365313002:
Merge SkCodec with SkScanlineDecoder (Closed)
Base URL: https://skia.googlesource.com/skia.git@master