blob: 4d9f52d43295d3971e3decd9b1d57dfa0ab36cd8 [file] [log] [blame]
/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkJpegDecoderMgr_DEFINED
#define SkJpegDecoderMgr_DEFINED
#include "include/codec/SkCodec.h"
#include "include/private/SkEncodedInfo.h"
#include "include/private/base/SkNoncopyable.h"
#include "src/codec/SkJpegPriv.h"
#include "src/codec/SkJpegSourceMgr.h"
extern "C" {
#include "jpeglib.h"
#include "jmorecfg.h"
}
#include <memory>
class SkStream;
class JpegDecoderMgr : SkNoncopyable {
public:
/*
* Print a useful error message and return false
*/
bool returnFalse(const char caller[]);
/*
* Print a useful error message and return a decode failure
*/
SkCodec::Result returnFailure(const char caller[], SkCodec::Result result);
/*
* Create the decode manager
* Does not take ownership of stream
*/
JpegDecoderMgr(SkStream* stream);
/*
* Initialize decompress struct
* Initialize the source manager
*/
void init();
/*
* Returns true if it successfully sets outColor to the encoded color,
* and false otherwise.
*/
bool getEncodedColor(SkEncodedInfo::Color* outColor);
/*
* Free memory used by the decode manager
*/
~JpegDecoderMgr();
/*
* Get the skjpeg_error_mgr in order to set an error return jmp_buf
*/
skjpeg_error_mgr* errorMgr() { return &fErrorMgr; }
/*
* Get function for the decompress info struct
*/
jpeg_decompress_struct* dinfo() { return &fDInfo; }
// Get the source manager.
SkJpegSourceMgr* getSourceMgr();
private:
// Wrapper that calls into the full SkJpegSourceMgr interface.
struct SourceMgr : jpeg_source_mgr {
static void InitSource(j_decompress_ptr dinfo);
static void SkipInputData(j_decompress_ptr dinfo, long num_bytes_long);
static boolean FillInputBuffer(j_decompress_ptr dinfo);
static void TermSource(j_decompress_ptr dinfo);
SourceMgr(std::unique_ptr<SkJpegSourceMgr> mgr);
std::unique_ptr<SkJpegSourceMgr> fSourceMgr;
};
jpeg_decompress_struct fDInfo;
SourceMgr fSrcMgr;
skjpeg_error_mgr fErrorMgr;
jpeg_progress_mgr fProgressMgr;
bool fInit;
};
#endif