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1 /* | 1 /* |
2 * Copyright 2013 The Android Open Source Project | 2 * Copyright 2013 The Android Open Source Project |
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 "SkErrorInternals.h" | 8 #include "SkErrorInternals.h" |
9 #include "SkImageDecoder.h" | 9 #include "SkImageDecoder.h" |
10 #include "SkStream.h" | 10 #include "SkStream.h" |
11 #include "SkTRegistry.h" | 11 #include "SkTRegistry.h" |
12 | 12 |
13 // This file is used for registration of SkImageDecoders. It also holds a functi
on | 13 // This file is used for registration of SkImageDecoders. It also holds a functi
on |
14 // for checking all the the registered SkImageDecoders for one that matches an | 14 // for checking all the the registered SkImageDecoders for one that matches an |
15 // input SkStreamRewindable. | 15 // input SkStreamRewindable. |
16 | 16 |
17 template SkImageDecoder_DecodeReg* SkImageDecoder_DecodeReg::gHead; | 17 template SkImageDecoder_DecodeReg* SkImageDecoder_DecodeReg::gHead; |
18 | 18 |
19 SkImageDecoder* image_decoder_from_stream(SkStreamRewindable*); | 19 SkImageDecoder* image_decoder_from_stream(SkStreamRewindable*); |
20 | 20 |
21 SkImageDecoder* image_decoder_from_stream(SkStreamRewindable* stream) { | 21 SkImageDecoder* image_decoder_from_stream(SkStreamRewindable* stream) { |
22 SkImageDecoder* codec = NULL; | 22 SkImageDecoder* codec = nullptr; |
23 const SkImageDecoder_DecodeReg* curr = SkImageDecoder_DecodeReg::Head(); | 23 const SkImageDecoder_DecodeReg* curr = SkImageDecoder_DecodeReg::Head(); |
24 while (curr) { | 24 while (curr) { |
25 codec = curr->factory()(stream); | 25 codec = curr->factory()(stream); |
26 // we rewind here, because we promise later when we call "decode", that | 26 // we rewind here, because we promise later when we call "decode", that |
27 // the stream will be at its beginning. | 27 // the stream will be at its beginning. |
28 bool rewindSuceeded = stream->rewind(); | 28 bool rewindSuceeded = stream->rewind(); |
29 | 29 |
30 // our image decoder's require that rewind is supported so we fail early | 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. | 31 // if we are given a stream that does not support rewinding. |
32 if (!rewindSuceeded) { | 32 if (!rewindSuceeded) { |
33 SkDEBUGF(("Unable to rewind the image stream.")); | 33 SkDEBUGF(("Unable to rewind the image stream.")); |
34 delete codec; | 34 delete codec; |
35 return NULL; | 35 return nullptr; |
36 } | 36 } |
37 | 37 |
38 if (codec) { | 38 if (codec) { |
39 return codec; | 39 return codec; |
40 } | 40 } |
41 curr = curr->next(); | 41 curr = curr->next(); |
42 } | 42 } |
43 return NULL; | 43 return nullptr; |
44 } | 44 } |
45 | 45 |
46 template SkImageDecoder_FormatReg* SkImageDecoder_FormatReg::gHead; | 46 template SkImageDecoder_FormatReg* SkImageDecoder_FormatReg::gHead; |
47 | 47 |
48 SkImageDecoder::Format SkImageDecoder::GetStreamFormat(SkStreamRewindable* strea
m) { | 48 SkImageDecoder::Format SkImageDecoder::GetStreamFormat(SkStreamRewindable* strea
m) { |
49 const SkImageDecoder_FormatReg* curr = SkImageDecoder_FormatReg::Head(); | 49 const SkImageDecoder_FormatReg* curr = SkImageDecoder_FormatReg::Head(); |
50 while (curr != NULL) { | 50 while (curr != nullptr) { |
51 Format format = curr->factory()(stream); | 51 Format format = curr->factory()(stream); |
52 if (!stream->rewind()) { | 52 if (!stream->rewind()) { |
53 SkErrorInternals::SetError(kInvalidOperation_SkError, | 53 SkErrorInternals::SetError(kInvalidOperation_SkError, |
54 "Unable to rewind the image stream\n"); | 54 "Unable to rewind the image stream\n"); |
55 return kUnknown_Format; | 55 return kUnknown_Format; |
56 } | 56 } |
57 if (format != kUnknown_Format) { | 57 if (format != kUnknown_Format) { |
58 return format; | 58 return format; |
59 } | 59 } |
60 curr = curr->next(); | 60 curr = curr->next(); |
61 } | 61 } |
62 return kUnknown_Format; | 62 return kUnknown_Format; |
63 } | 63 } |
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