mirror of
https://github.com/classilla/tenfourfox.git
synced 2025-02-08 01:31:00 +00:00
85 lines
2.5 KiB
C
85 lines
2.5 KiB
C
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
||
|
|
* This Source Code Form is subject to the terms of the Mozilla Public
|
||
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
||
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
||
|
|
|
||
|
|
#ifndef mozilla_image_encoders_jpeg_nsJPEGEncoder_h
|
||
|
|
#define mozilla_image_encoders_jpeg_nsJPEGEncoder_h
|
||
|
|
|
||
|
|
#include "imgIEncoder.h"
|
||
|
|
|
||
|
|
#include "mozilla/ReentrantMonitor.h"
|
||
|
|
#include "mozilla/Attributes.h"
|
||
|
|
|
||
|
|
#include "nsCOMPtr.h"
|
||
|
|
|
||
|
|
// needed for JPEG library
|
||
|
|
#include <stdio.h>
|
||
|
|
|
||
|
|
extern "C" {
|
||
|
|
#include "jpeglib.h"
|
||
|
|
}
|
||
|
|
|
||
|
|
#define NS_JPEGENCODER_CID \
|
||
|
|
{ \
|
||
|
|
/* ac2bb8fe-eeeb-4572-b40f-be03932b56e0 */ \
|
||
|
|
0xac2bb8fe, \
|
||
|
|
0xeeeb, \
|
||
|
|
0x4572, \
|
||
|
|
{0xb4, 0x0f, 0xbe, 0x03, 0x93, 0x2b, 0x56, 0xe0} \
|
||
|
|
}
|
||
|
|
|
||
|
|
// Provides JPEG encoding functionality. Use InitFromData() to do the
|
||
|
|
// encoding. See that function definition for encoding options.
|
||
|
|
|
||
|
|
class nsJPEGEncoder final : public imgIEncoder
|
||
|
|
{
|
||
|
|
typedef mozilla::ReentrantMonitor ReentrantMonitor;
|
||
|
|
public:
|
||
|
|
NS_DECL_THREADSAFE_ISUPPORTS
|
||
|
|
NS_DECL_IMGIENCODER
|
||
|
|
NS_DECL_NSIINPUTSTREAM
|
||
|
|
NS_DECL_NSIASYNCINPUTSTREAM
|
||
|
|
|
||
|
|
nsJPEGEncoder();
|
||
|
|
|
||
|
|
private:
|
||
|
|
~nsJPEGEncoder();
|
||
|
|
|
||
|
|
protected:
|
||
|
|
|
||
|
|
void ConvertHostARGBRow(const uint8_t* aSrc, uint8_t* aDest,
|
||
|
|
uint32_t aPixelWidth);
|
||
|
|
void ConvertRGBARow(const uint8_t* aSrc, uint8_t* aDest,
|
||
|
|
uint32_t aPixelWidth);
|
||
|
|
|
||
|
|
static void initDestination(jpeg_compress_struct* cinfo);
|
||
|
|
static boolean emptyOutputBuffer(jpeg_compress_struct* cinfo);
|
||
|
|
static void termDestination(jpeg_compress_struct* cinfo);
|
||
|
|
|
||
|
|
static void errorExit(jpeg_common_struct* cinfo);
|
||
|
|
|
||
|
|
void NotifyListener();
|
||
|
|
|
||
|
|
bool mFinished;
|
||
|
|
|
||
|
|
// image buffer
|
||
|
|
uint8_t* mImageBuffer;
|
||
|
|
uint32_t mImageBufferSize;
|
||
|
|
uint32_t mImageBufferUsed;
|
||
|
|
|
||
|
|
uint32_t mImageBufferReadPoint;
|
||
|
|
|
||
|
|
nsCOMPtr<nsIInputStreamCallback> mCallback;
|
||
|
|
nsCOMPtr<nsIEventTarget> mCallbackTarget;
|
||
|
|
uint32_t mNotifyThreshold;
|
||
|
|
|
||
|
|
// nsJPEGEncoder is designed to allow one thread to pump data into it while
|
||
|
|
// another reads from it. We lock to ensure that the buffer remains
|
||
|
|
// append-only while we read from it (that it is not realloced) and to ensure
|
||
|
|
// that only one thread dispatches a callback for each call to AsyncWait.
|
||
|
|
ReentrantMonitor mReentrantMonitor;
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif // mozilla_image_encoders_jpeg_nsJPEGEncoder_h
|