/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ /* 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 nsImageClipboard_h #define nsImageClipboard_h /* Things To Do 11/8/00 Check image metrics, can we support them? Do we need to? Any other render format? HTML? */ #include "nsError.h" #include <windows.h> #include "nsCOMPtr.h" #include "imgIContainer.h" #include "nsIInputStream.h" // // nsImageToClipboard // // A utility class that takes an imgIContainer and does all the bitmap magic // to allow us to put it on the clipboard // class nsImageToClipboard { public: nsImageToClipboard(imgIContainer* aInImage, bool aWantDIBV5 = true); ~nsImageToClipboard(); // Call to get the actual bits that go on the clipboard. If |nullptr|, the // setup operations have failed. // // NOTE: The caller owns the handle and must delete it with ::GlobalRelease() nsresult GetPicture ( HANDLE* outBits ) ; private: // Computes # of bytes needed by a bitmap with the specified attributes. int32_t CalcSize(int32_t aHeight, int32_t aColors, WORD aBitsPerPixel, int32_t aSpanBytes); int32_t CalcSpanLength(uint32_t aWidth, uint32_t aBitCount); // Do the work nsresult CreateFromImage ( imgIContainer* inImage, HANDLE* outBitmap ); nsCOMPtr<imgIContainer> mImage; // the image we're working with bool mWantDIBV5; }; // class nsImageToClipboard struct bitFields { uint32_t red; uint32_t green; uint32_t blue; uint8_t redLeftShift; uint8_t redRightShift; uint8_t greenLeftShift; uint8_t greenRightShift; uint8_t blueLeftShift; uint8_t blueRightShift; }; // // nsImageFromClipboard // // A utility class that takes a DIB from the win32 clipboard and does // all the bitmap magic to convert it to a PNG or a JPEG in the form of a nsIInputStream // class nsImageFromClipboard { public: nsImageFromClipboard () ; ~nsImageFromClipboard ( ) ; // Retrieve the newly created image nsresult GetEncodedImageStream (unsigned char * aClipboardData, const char * aMIMEFormat, nsIInputStream** outImage); private: void InvertRows(unsigned char * aInitialBuffer, uint32_t aSizeOfBuffer, uint32_t aNumBytesPerRow); nsresult ConvertColorBitMap(unsigned char * aInputBuffer, PBITMAPINFO pBitMapInfo, unsigned char * aOutBuffer); void CalcBitmask(uint32_t aMask, uint8_t& aBegin, uint8_t& aLength); void CalcBitShift(bitFields * aColorMask); }; // nsImageFromClipboard #endif