diff options
author | Wei-Ta Chen <weita@google.com> | 2009-12-02 20:16:31 +0800 |
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committer | Wei-Ta Chen <weita@google.com> | 2010-01-20 23:43:57 +0800 |
commit | 2c1275107148cb95b0497cadeeb43e31d5063929 (patch) | |
tree | 678b52a818856eff0958a06f65b8854bc134adb8 /include | |
parent | 9bad9f168079c6c0f09d89cf422b4a875f54b9d4 (diff) | |
download | external_skia-2c1275107148cb95b0497cadeeb43e31d5063929.zip external_skia-2c1275107148cb95b0497cadeeb43e31d5063929.tar.gz external_skia-2c1275107148cb95b0497cadeeb43e31d5063929.tar.bz2 |
Move some utility structs/functions in SkImageDecoder_libjpeg.cpp to SkJpegUtility.h/.cpp,
so that others are able to use these structs/functions when they call libjpeg for compression.
Diffstat (limited to 'include')
-rw-r--r-- | include/images/SkJpegUtility.h | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/include/images/SkJpegUtility.h b/include/images/SkJpegUtility.h new file mode 100644 index 0000000..cc9d246 --- /dev/null +++ b/include/images/SkJpegUtility.h @@ -0,0 +1,71 @@ +/* + * Copyright (C) 2010 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef SkJpegUtility_DEFINED +#define SkJpegUtility_DEFINED + +#include "SkImageDecoder.h" +#include "SkStream.h" + +extern "C" { + #include "jpeglib.h" + #include "jerror.h" +} + +#include <setjmp.h> + +/* Our error-handling struct. + * +*/ +struct skjpeg_error_mgr : jpeg_error_mgr { + jmp_buf fJmpBuf; +}; + + +void skjpeg_error_exit(j_common_ptr cinfo); + +/////////////////////////////////////////////////////////////////////////// +/* Our source struct for directing jpeg to our stream object. +*/ +struct skjpeg_source_mgr : jpeg_source_mgr { + skjpeg_source_mgr(SkStream* stream, SkImageDecoder* decoder); + + SkStream* fStream; + const void* fMemoryBase; + size_t fMemoryBaseSize; + SkImageDecoder* fDecoder; + enum { + kBufferSize = 1024 + }; + char fBuffer[kBufferSize]; +}; + +///////////////////////////////////////////////////////////////////////////// +/* Our destination struct for directing decompressed pixels to our stream + * object. + */ +struct skjpeg_destination_mgr : jpeg_destination_mgr { + skjpeg_destination_mgr(SkWStream* stream); + + SkWStream* fStream; + + enum { + kBufferSize = 1024 + }; + uint8_t fBuffer[kBufferSize]; +}; + +#endif |