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1 /* | 1 /* |
2 * Copyright 2015 Google Inc. | 2 * Copyright 2015 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 "SkCodecPriv.h" | 8 #include "SkCodecPriv.h" |
9 #include "SkJpegUtility.h" | 9 #include "SkJpegUtility_codec.h" |
10 | 10 |
11 /* | 11 /* |
12 * Initialize the source manager | 12 * Initialize the source manager |
13 */ | 13 */ |
14 static void sk_init_source(j_decompress_ptr dinfo) { | 14 static void sk_init_source(j_decompress_ptr dinfo) { |
15 skjpeg_source_mgr* src = (skjpeg_source_mgr*) dinfo->src; | 15 skjpeg_source_mgr* src = (skjpeg_source_mgr*) dinfo->src; |
16 src->next_input_byte = (const JOCTET*) src->fBuffer; | 16 src->next_input_byte = (const JOCTET*) src->fBuffer; |
17 src->bytes_in_buffer = 0; | 17 src->bytes_in_buffer = 0; |
18 } | 18 } |
19 | 19 |
20 /* | 20 /* |
21 * Fill the input buffer from the stream | 21 * Fill the input buffer from the stream |
22 */ | 22 */ |
23 static boolean sk_fill_input_buffer(j_decompress_ptr dinfo) { | 23 static boolean sk_fill_input_buffer(j_decompress_ptr dinfo) { |
24 skjpeg_source_mgr* src = (skjpeg_source_mgr*) dinfo->src; | 24 skjpeg_source_mgr* src = (skjpeg_source_mgr*) dinfo->src; |
25 size_t bytes = src->fStream->read(src->fBuffer, skjpeg_source_mgr::kBufferSi
ze); | 25 size_t bytes = src->fStream->read(src->fBuffer, skjpeg_source_mgr::kBufferSi
ze); |
26 | 26 |
27 // libjpeg is still happy with a less than full read, as long as the result
is non-zero | 27 // libjpeg is still happy with a less than full read, as long as the result
is non-zero |
28 if (bytes == 0) { | 28 if (bytes == 0) { |
29 return false; | 29 return false; |
30 } | 30 } |
31 | 31 |
32 src->next_input_byte = (const JOCTET*) src->fBuffer; | 32 src->next_input_byte = (const JOCTET*) src->fBuffer; |
33 src->bytes_in_buffer = bytes; | 33 src->bytes_in_buffer = bytes; |
34 return true; | 34 return true; |
35 } | 35 } |
36 | 36 |
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80 /* | 80 /* |
81 * Call longjmp to continue execution on an error | 81 * Call longjmp to continue execution on an error |
82 */ | 82 */ |
83 void skjpeg_err_exit(j_common_ptr dinfo) { | 83 void skjpeg_err_exit(j_common_ptr dinfo) { |
84 // Simply return to Skia client code | 84 // Simply return to Skia client code |
85 // JpegDecoderMgr will take care of freeing memory | 85 // JpegDecoderMgr will take care of freeing memory |
86 skjpeg_error_mgr* error = (skjpeg_error_mgr*) dinfo->err; | 86 skjpeg_error_mgr* error = (skjpeg_error_mgr*) dinfo->err; |
87 (*error->output_message) (dinfo); | 87 (*error->output_message) (dinfo); |
88 longjmp(error->fJmpBuf, 1); | 88 longjmp(error->fJmpBuf, 1); |
89 } | 89 } |
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