1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/image/encoders/ico/nsICOEncoder.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,97 @@
1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.6 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.7 +
1.8 +#include "mozilla/Attributes.h"
1.9 +#include "mozilla/ReentrantMonitor.h"
1.10 +
1.11 +#include "imgIEncoder.h"
1.12 +
1.13 +#include "nsAutoPtr.h"
1.14 +#include "nsCOMPtr.h"
1.15 +#include "ICOFileHeaders.h"
1.16 +
1.17 +class nsBMPEncoder;
1.18 +class nsPNGEncoder;
1.19 +
1.20 +#define NS_ICOENCODER_CID \
1.21 +{ /*92AE3AB2-8968-41B1-8709-B6123BCEAF21 */ \
1.22 + 0x92ae3ab2, \
1.23 + 0x8968, \
1.24 + 0x41b1, \
1.25 + {0x87, 0x09, 0xb6, 0x12, 0x3b, 0Xce, 0xaf, 0x21} \
1.26 +}
1.27 +
1.28 +// Provides ICO encoding functionality. Use InitFromData() to do the
1.29 +// encoding. See that function definition for encoding options.
1.30 +
1.31 +class nsICOEncoder MOZ_FINAL : public imgIEncoder
1.32 +{
1.33 + typedef mozilla::ReentrantMonitor ReentrantMonitor;
1.34 +public:
1.35 + NS_DECL_THREADSAFE_ISUPPORTS
1.36 + NS_DECL_IMGIENCODER
1.37 + NS_DECL_NSIINPUTSTREAM
1.38 + NS_DECL_NSIASYNCINPUTSTREAM
1.39 +
1.40 + nsICOEncoder();
1.41 + ~nsICOEncoder();
1.42 +
1.43 + // Obtains the width of the icon directory entry
1.44 + uint32_t GetRealWidth() const
1.45 + {
1.46 + return mICODirEntry.mWidth == 0 ? 256 : mICODirEntry.mWidth;
1.47 + }
1.48 +
1.49 + // Obtains the height of the icon directory entry
1.50 + uint32_t GetRealHeight() const
1.51 + {
1.52 + return mICODirEntry.mHeight == 0 ? 256 : mICODirEntry.mHeight;
1.53 + }
1.54 +
1.55 +protected:
1.56 + nsresult ParseOptions(const nsAString& aOptions, uint32_t* bpp,
1.57 + bool *usePNG);
1.58 + void NotifyListener();
1.59 +
1.60 + // Initializes the icon file header mICOFileHeader
1.61 + void InitFileHeader();
1.62 + // Initializes the icon directory info header mICODirEntry
1.63 + void InitInfoHeader(uint32_t aBPP, uint8_t aWidth, uint8_t aHeight);
1.64 + // Encodes the icon file header mICOFileHeader
1.65 + void EncodeFileHeader();
1.66 + // Encodes the icon directory info header mICODirEntry
1.67 + void EncodeInfoHeader();
1.68 + // Obtains the current offset filled up to for the image buffer
1.69 + inline int32_t GetCurrentImageBufferOffset()
1.70 + {
1.71 + return static_cast<int32_t>(mImageBufferCurr - mImageBufferStart);
1.72 + }
1.73 +
1.74 + // Holds either a PNG or a BMP depending on the encoding options specified
1.75 + // or if no encoding options specified will use the default (PNG)
1.76 + nsCOMPtr<imgIEncoder> mContainedEncoder;
1.77 +
1.78 + // These headers will always contain endian independent stuff.
1.79 + // Don't trust the width and height of mICODirEntry directly,
1.80 + // instead use the accessors GetRealWidth() and GetRealHeight().
1.81 + mozilla::image::IconFileHeader mICOFileHeader;
1.82 + mozilla::image::IconDirEntry mICODirEntry;
1.83 +
1.84 + // Keeps track of the start of the image buffer
1.85 + uint8_t* mImageBufferStart;
1.86 + // Keeps track of the current position in the image buffer
1.87 + uint8_t* mImageBufferCurr;
1.88 + // Keeps track of the image buffer size
1.89 + uint32_t mImageBufferSize;
1.90 + // Keeps track of the number of bytes in the image buffer which are read
1.91 + uint32_t mImageBufferReadPoint;
1.92 + // Stores true if the image is done being encoded
1.93 + bool mFinished;
1.94 + // Stores true if the contained image is a PNG
1.95 + bool mUsePNG;
1.96 +
1.97 + nsCOMPtr<nsIInputStreamCallback> mCallback;
1.98 + nsCOMPtr<nsIEventTarget> mCallbackTarget;
1.99 + uint32_t mNotifyThreshold;
1.100 +};
