michael@0: /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef nsImageClipboard_h
michael@0: #define nsImageClipboard_h
michael@0: 
michael@0: /* Things To Do 11/8/00
michael@0: 
michael@0: Check image metrics, can we support them? Do we need to?
michael@0: Any other render format? HTML?
michael@0: 
michael@0: */
michael@0: 
michael@0: #include "nsError.h"
michael@0: #include <windows.h>
michael@0: 
michael@0: #include "nsCOMPtr.h"
michael@0: #include "imgIContainer.h"
michael@0: #include "nsIInputStream.h"
michael@0: 
michael@0: 
michael@0: //
michael@0: // nsImageToClipboard
michael@0: //
michael@0: // A utility class that takes an imgIContainer and does all the bitmap magic
michael@0: // to allow us to put it on the clipboard
michael@0: //
michael@0: class nsImageToClipboard
michael@0: {
michael@0: public:
michael@0:   nsImageToClipboard(imgIContainer* aInImage, bool aWantDIBV5 = true);
michael@0:   ~nsImageToClipboard();
michael@0: 
michael@0:     // Call to get the actual bits that go on the clipboard. If |nullptr|, the
michael@0:     // setup operations have failed.
michael@0:     //
michael@0:     // NOTE: The caller owns the handle and must delete it with ::GlobalRelease()
michael@0:   nsresult GetPicture ( HANDLE* outBits ) ;
michael@0: 
michael@0: private:
michael@0: 
michael@0:     // Computes # of bytes needed by a bitmap with the specified attributes.
michael@0:   int32_t CalcSize(int32_t aHeight, int32_t aColors, WORD aBitsPerPixel, int32_t aSpanBytes);
michael@0:   int32_t CalcSpanLength(uint32_t aWidth, uint32_t aBitCount);
michael@0: 
michael@0:     // Do the work
michael@0:   nsresult CreateFromImage ( imgIContainer* inImage, HANDLE* outBitmap );
michael@0: 
michael@0:   nsCOMPtr<imgIContainer> mImage;            // the image we're working with
michael@0:   bool mWantDIBV5;
michael@0: 
michael@0: }; // class nsImageToClipboard
michael@0: 
michael@0: 
michael@0: struct bitFields {
michael@0:     uint32_t red;
michael@0:     uint32_t green;
michael@0:     uint32_t blue;
michael@0:     uint8_t redLeftShift;
michael@0:     uint8_t redRightShift;
michael@0:     uint8_t greenLeftShift;
michael@0:     uint8_t greenRightShift;
michael@0:     uint8_t blueLeftShift;
michael@0:     uint8_t blueRightShift;
michael@0: };
michael@0: 
michael@0: //
michael@0: // nsImageFromClipboard
michael@0: //
michael@0: // A utility class that takes a DIB from the win32 clipboard and does
michael@0: // all the bitmap magic to convert it to a PNG or a JPEG in the form of a nsIInputStream
michael@0: //
michael@0: class nsImageFromClipboard
michael@0: {
michael@0: public:
michael@0:   nsImageFromClipboard () ;
michael@0:   ~nsImageFromClipboard ( ) ;
michael@0:   
michael@0:     // Retrieve the newly created image
michael@0:   nsresult GetEncodedImageStream (unsigned char * aClipboardData, const char * aMIMEFormat, nsIInputStream** outImage);
michael@0: 
michael@0: private:
michael@0: 
michael@0:   void InvertRows(unsigned char * aInitialBuffer, uint32_t aSizeOfBuffer, uint32_t aNumBytesPerRow);
michael@0:   nsresult ConvertColorBitMap(unsigned char * aInputBuffer, PBITMAPINFO pBitMapInfo, unsigned char * aOutBuffer);
michael@0:   void CalcBitmask(uint32_t aMask, uint8_t& aBegin, uint8_t& aLength);
michael@0:   void CalcBitShift(bitFields * aColorMask);
michael@0: 
michael@0: }; // nsImageFromClipboard
michael@0: 
michael@0: #endif