gfx/skia/trunk/src/images/SkJpegUtility.cpp@129ffea94266
gfx/skia/trunk/src/images/SkJpegUtility.cpp
Sat, 03 Jan 2015 20:18:00 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Sat, 03 Jan 2015 20:18:00 +0100
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
- permissions
- -rw-r--r--
Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.
1 /*
2 * Copyright 2010 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 */
9 #include "SkJpegUtility.h"
11 /////////////////////////////////////////////////////////////////////
12 static void sk_init_source(j_decompress_ptr cinfo) {
13 skjpeg_source_mgr* src = (skjpeg_source_mgr*)cinfo->src;
14 src->next_input_byte = (const JOCTET*)src->fBuffer;
15 src->bytes_in_buffer = 0;
16 #ifdef SK_BUILD_FOR_ANDROID
17 src->current_offset = 0;
18 #endif
19 if (!src->fStream->rewind()) {
20 SkDebugf("xxxxxxxxxxxxxx failure to rewind\n");
21 cinfo->err->error_exit((j_common_ptr)cinfo);
22 }
23 }
25 #ifdef SK_BUILD_FOR_ANDROID
26 static boolean sk_seek_input_data(j_decompress_ptr cinfo, long byte_offset) {
27 skjpeg_source_mgr* src = (skjpeg_source_mgr*)cinfo->src;
28 size_t bo = (size_t) byte_offset;
30 if (bo > src->current_offset) {
31 (void)src->fStream->skip(bo - src->current_offset);
32 } else {
33 if (!src->fStream->rewind()) {
34 SkDebugf("xxxxxxxxxxxxxx failure to rewind\n");
35 cinfo->err->error_exit((j_common_ptr)cinfo);
36 return false;
37 }
38 (void)src->fStream->skip(bo);
39 }
41 src->current_offset = bo;
42 src->next_input_byte = (const JOCTET*)src->fBuffer;
43 src->bytes_in_buffer = 0;
44 return true;
45 }
46 #endif
48 static boolean sk_fill_input_buffer(j_decompress_ptr cinfo) {
49 skjpeg_source_mgr* src = (skjpeg_source_mgr*)cinfo->src;
50 if (src->fDecoder != NULL && src->fDecoder->shouldCancelDecode()) {
51 return FALSE;
52 }
53 size_t bytes = src->fStream->read(src->fBuffer, skjpeg_source_mgr::kBufferSize);
54 // note that JPEG is happy with less than the full read,
55 // as long as the result is non-zero
56 if (bytes == 0) {
57 return FALSE;
58 }
60 #ifdef SK_BUILD_FOR_ANDROID
61 src->current_offset += bytes;
62 #endif
63 src->next_input_byte = (const JOCTET*)src->fBuffer;
64 src->bytes_in_buffer = bytes;
65 return TRUE;
66 }
68 static void sk_skip_input_data(j_decompress_ptr cinfo, long num_bytes) {
69 skjpeg_source_mgr* src = (skjpeg_source_mgr*)cinfo->src;
71 if (num_bytes > (long)src->bytes_in_buffer) {
72 size_t bytesToSkip = num_bytes - src->bytes_in_buffer;
73 while (bytesToSkip > 0) {
74 size_t bytes = src->fStream->skip(bytesToSkip);
75 if (bytes <= 0 || bytes > bytesToSkip) {
76 // SkDebugf("xxxxxxxxxxxxxx failure to skip request %d returned %d\n", bytesToSkip, bytes);
77 cinfo->err->error_exit((j_common_ptr)cinfo);
78 return;
79 }
80 #ifdef SK_BUILD_FOR_ANDROID
81 src->current_offset += bytes;
82 #endif
83 bytesToSkip -= bytes;
84 }
85 src->next_input_byte = (const JOCTET*)src->fBuffer;
86 src->bytes_in_buffer = 0;
87 } else {
88 src->next_input_byte += num_bytes;
89 src->bytes_in_buffer -= num_bytes;
90 }
91 }
93 static void sk_term_source(j_decompress_ptr /*cinfo*/) {}
96 ///////////////////////////////////////////////////////////////////////////////
98 skjpeg_source_mgr::skjpeg_source_mgr(SkStream* stream, SkImageDecoder* decoder)
99 : fStream(SkRef(stream))
100 , fDecoder(decoder) {
102 init_source = sk_init_source;
103 fill_input_buffer = sk_fill_input_buffer;
104 skip_input_data = sk_skip_input_data;
105 resync_to_restart = jpeg_resync_to_restart;
106 term_source = sk_term_source;
107 #ifdef SK_BUILD_FOR_ANDROID
108 seek_input_data = sk_seek_input_data;
109 #endif
110 // SkDebugf("**************** use memorybase %p %d\n", fMemoryBase, fMemoryBaseSize);
111 }
113 skjpeg_source_mgr::~skjpeg_source_mgr() {
114 SkSafeUnref(fStream);
115 }
117 ///////////////////////////////////////////////////////////////////////////////
119 static void sk_init_destination(j_compress_ptr cinfo) {
120 skjpeg_destination_mgr* dest = (skjpeg_destination_mgr*)cinfo->dest;
122 dest->next_output_byte = dest->fBuffer;
123 dest->free_in_buffer = skjpeg_destination_mgr::kBufferSize;
124 }
126 static boolean sk_empty_output_buffer(j_compress_ptr cinfo) {
127 skjpeg_destination_mgr* dest = (skjpeg_destination_mgr*)cinfo->dest;
129 // if (!dest->fStream->write(dest->fBuffer, skjpeg_destination_mgr::kBufferSize - dest->free_in_buffer))
130 if (!dest->fStream->write(dest->fBuffer,
131 skjpeg_destination_mgr::kBufferSize)) {
132 ERREXIT(cinfo, JERR_FILE_WRITE);
133 return false;
134 }
136 dest->next_output_byte = dest->fBuffer;
137 dest->free_in_buffer = skjpeg_destination_mgr::kBufferSize;
138 return TRUE;
139 }
141 static void sk_term_destination (j_compress_ptr cinfo) {
142 skjpeg_destination_mgr* dest = (skjpeg_destination_mgr*)cinfo->dest;
144 size_t size = skjpeg_destination_mgr::kBufferSize - dest->free_in_buffer;
145 if (size > 0) {
146 if (!dest->fStream->write(dest->fBuffer, size)) {
147 ERREXIT(cinfo, JERR_FILE_WRITE);
148 return;
149 }
150 }
151 dest->fStream->flush();
152 }
154 skjpeg_destination_mgr::skjpeg_destination_mgr(SkWStream* stream)
155 : fStream(stream) {
156 this->init_destination = sk_init_destination;
157 this->empty_output_buffer = sk_empty_output_buffer;
158 this->term_destination = sk_term_destination;
159 }
161 void skjpeg_error_exit(j_common_ptr cinfo) {
162 skjpeg_error_mgr* error = (skjpeg_error_mgr*)cinfo->err;
164 (*error->output_message) (cinfo);
166 /* Let the memory manager delete any temp files before we die */
167 jpeg_destroy(cinfo);
169 longjmp(error->fJmpBuf, -1);
170 }
