The Tor Browser / file comparison
comparison: gfx/skia/trunk/src/images/SkImageDecoder_FactoryRegistrar.cpp
gfx/skia/trunk/src/images/SkImageDecoder_FactoryRegistrar.cpp
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
equal
deleted
inserted
replaced
| -1:000000000000 | 0:b254206018b9 |
|---|---|
| 1 /* | |
| 2 * Copyright 2013 The Android Open Source Project | |
| 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 "SkErrorInternals.h" | |
| 9 #include "SkImageDecoder.h" | |
| 10 #include "SkStream.h" | |
| 11 #include "SkTRegistry.h" | |
| 12 | |
| 13 // This file is used for registration of SkImageDecoders. It also holds a function | |
| 14 // for checking all the the registered SkImageDecoders for one that matches an | |
| 15 // input SkStreamRewindable. | |
| 16 | |
| 17 template SkImageDecoder_DecodeReg* SkImageDecoder_DecodeReg::gHead; | |
| 18 | |
| 19 SkImageDecoder* image_decoder_from_stream(SkStreamRewindable*); | |
| 20 | |
| 21 SkImageDecoder* image_decoder_from_stream(SkStreamRewindable* stream) { | |
| 22 SkImageDecoder* codec = NULL; | |
| 23 const SkImageDecoder_DecodeReg* curr = SkImageDecoder_DecodeReg::Head(); | |
| 24 while (curr) { | |
| 25 codec = curr->factory()(stream); | |
| 26 // we rewind here, because we promise later when we call "decode", that | |
| 27 // the stream will be at its beginning. | |
| 28 bool rewindSuceeded = stream->rewind(); | |
| 29 | |
| 30 // our image decoder's require that rewind is supported so we fail early | |
| 31 // if we are given a stream that does not support rewinding. | |
| 32 if (!rewindSuceeded) { | |
| 33 SkDEBUGF(("Unable to rewind the image stream.")); | |
| 34 SkDELETE(codec); | |
| 35 return NULL; | |
| 36 } | |
| 37 | |
| 38 if (codec) { | |
| 39 return codec; | |
| 40 } | |
| 41 curr = curr->next(); | |
| 42 } | |
| 43 return NULL; | |
| 44 } | |
| 45 | |
| 46 template SkImageDecoder_FormatReg* SkImageDecoder_FormatReg::gHead; | |
| 47 | |
| 48 SkImageDecoder::Format SkImageDecoder::GetStreamFormat(SkStreamRewindable* stream) { | |
| 49 const SkImageDecoder_FormatReg* curr = SkImageDecoder_FormatReg::Head(); | |
| 50 while (curr != NULL) { | |
| 51 Format format = curr->factory()(stream); | |
| 52 if (!stream->rewind()) { | |
| 53 SkErrorInternals::SetError(kInvalidOperation_SkError, | |
| 54 "Unable to rewind the image stream\n"); | |
| 55 return kUnknown_Format; | |
| 56 } | |
| 57 if (format != kUnknown_Format) { | |
| 58 return format; | |
| 59 } | |
| 60 curr = curr->next(); | |
| 61 } | |
| 62 return kUnknown_Format; | |
| 63 } |
