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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /image/encoders/ico/nsICOEncoder.h
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'image/encoders/ico/nsICOEncoder.h')
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diff --git a/image/encoders/ico/nsICOEncoder.h b/image/encoders/ico/nsICOEncoder.h
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+++ b/image/encoders/ico/nsICOEncoder.h
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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