gecko-dev/image/decoders/nsWBMPDecoder.h

63 строки
1.6 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 nsWBMPDecoder_h__
#define nsWBMPDecoder_h__
#include "Decoder.h"
#include "nsCOMPtr.h"
#include "imgDecoderObserver.h"
#include "gfxColor.h"
namespace mozilla {
namespace image {
class RasterImage;
/* WBMP is a monochrome graphics file format optimized for mobile computing devices.
* Format description from http://www.wapforum.org/what/technical/SPEC-WAESpec-19990524.pdf
*/
typedef enum {
WbmpStateStart,
DecodingFixHeader,
DecodingWidth,
DecodingHeight,
DecodingImageData,
DecodingFailed,
WbmpStateFinished
} WbmpDecodingState;
typedef enum {
IntParseSucceeded,
IntParseFailed,
IntParseInProgress
} WbmpIntDecodeStatus;
class nsWBMPDecoder : public Decoder
{
public:
nsWBMPDecoder(RasterImage &aImage);
virtual ~nsWBMPDecoder();
virtual void WriteInternal(const char* aBuffer, uint32_t aCount);
private:
uint32_t mWidth;
uint32_t mHeight;
uint8_t* mRow; // Holds one raw line of the image
uint32_t mRowBytes; // How many bytes of the row were already received
uint32_t mCurLine; // The current line being decoded (0 to mHeight - 1)
WbmpDecodingState mState; // Describes what part of the file we are decoding now.
};
} // namespace image
} // namespace mozilla
#endif // nsWBMPDecoder_h__