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/* 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_ico_nsICOEncoder_h
#define mozilla_image_encoders_ico_nsICOEncoder_h
#include "mozilla/Attributes.h"
#include "mozilla/ReentrantMonitor.h"
#include "imgIEncoder.h"
#include "nsCOMPtr.h"
#include "ICOFileHeaders.h"
#define NS_ICOENCODER_CID \
{ /*92AE3AB2-8968-41B1-8709-B6123BCEAF21 */ \
0x92ae3ab2, \
0x8968, \
0x41b1, \
{0x87, 0x09, 0xb6, 0x12, 0x3b, 0Xce, 0xaf, 0x21} \
}
// Provides ICO encoding functionality. Use InitFromData() to do the
// encoding. See that function definition for encoding options.
class nsICOEncoder final : public imgIEncoder
{
typedef mozilla::ReentrantMonitor ReentrantMonitor;
public:
NS_DECL_THREADSAFE_ISUPPORTS
NS_DECL_IMGIENCODER
NS_DECL_NSIINPUTSTREAM
NS_DECL_NSIASYNCINPUTSTREAM
nsICOEncoder();
// Obtains the width of the icon directory entry
uint32_t GetRealWidth() const
{
return mICODirEntry.mWidth == 0 ? 256 : mICODirEntry.mWidth;
}
// Obtains the height of the icon directory entry
uint32_t GetRealHeight() const
{
return mICODirEntry.mHeight == 0 ? 256 : mICODirEntry.mHeight;
}
protected:
~nsICOEncoder();
nsresult ParseOptions(const nsAString& aOptions, uint16_t& aBppOut,
bool& aUsePNGOut);
void NotifyListener();
// Initializes the icon file header mICOFileHeader
void InitFileHeader();
// Initializes the icon directory info header mICODirEntry
void InitInfoHeader(uint16_t aBPP, uint8_t aWidth, uint8_t aHeight);
// Encodes the icon file header mICOFileHeader
void EncodeFileHeader();
// Encodes the icon directory info header mICODirEntry
void EncodeInfoHeader();
// Obtains the current offset filled up to for the image buffer
inline int32_t GetCurrentImageBufferOffset()
{
return static_cast<int32_t>(mImageBufferCurr - mImageBufferStart);
}
// Holds either a PNG or a BMP depending on the encoding options specified
// or if no encoding options specified will use the default (PNG)
nsCOMPtr<imgIEncoder> mContainedEncoder;
// These headers will always contain endian independent stuff.
// Don't trust the width and height of mICODirEntry directly,
// instead use the accessors GetRealWidth() and GetRealHeight().
mozilla::image::IconFileHeader mICOFileHeader;
mozilla::image::IconDirEntry mICODirEntry;
// Keeps track of the start of the image buffer
uint8_t* mImageBufferStart;
// Keeps track of the current position in the image buffer
uint8_t* mImageBufferCurr;
// Keeps track of the image buffer size
uint32_t mImageBufferSize;
// Keeps track of the number of bytes in the image buffer which are read
uint32_t mImageBufferReadPoint;
// Stores true if the image is done being encoded
bool mFinished;
// Stores true if the contained image is a PNG
bool mUsePNG;
nsCOMPtr<nsIInputStreamCallback> mCallback;
nsCOMPtr<nsIEventTarget> mCallbackTarget;
uint32_t mNotifyThreshold;
};
#endif // mozilla_image_encoders_ico_nsICOEncoder_h
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