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/*
* 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 SkJpegUtility_codec_DEFINED
#define SkJpegUtility_codec_DEFINED
#include "SkStream.h"
#include <setjmp.h>
// stdio is needed for jpeglib
#include <stdio.h>
extern "C" {
#include "jpeglib.h"
#include "jerror.h"
}
static constexpr uint32_t kICCMarker = JPEG_APP0 + 2;
static constexpr uint32_t kICCMarkerHeaderSize = 14;
static constexpr uint8_t kICCSig[] = {
'I', 'C', 'C', '_', 'P', 'R', 'O', 'F', 'I', 'L', 'E', '\0',
};
/*
* Error handling struct
*/
struct skjpeg_error_mgr : jpeg_error_mgr {
jmp_buf fJmpBuf;
};
/*
* Error handling function
*/
void skjpeg_err_exit(j_common_ptr cinfo);
/*
* Source handling struct for that allows libjpeg to use our stream object
*/
struct skjpeg_source_mgr : jpeg_source_mgr {
skjpeg_source_mgr(SkStream* stream);
SkStream* fStream; // unowned
enum {
// TODO (msarett): Experiment with different buffer sizes.
// This size was chosen because it matches SkImageDecoder.
kBufferSize = 1024
};
uint8_t fBuffer[kBufferSize];
};
#endif
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