1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/widget/windows/nsImageClipboard.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,93 @@
1.4 +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#ifndef nsImageClipboard_h
1.10 +#define nsImageClipboard_h
1.11 +
1.12 +/* Things To Do 11/8/00
1.13 +
1.14 +Check image metrics, can we support them? Do we need to?
1.15 +Any other render format? HTML?
1.16 +
1.17 +*/
1.18 +
1.19 +#include "nsError.h"
1.20 +#include <windows.h>
1.21 +
1.22 +#include "nsCOMPtr.h"
1.23 +#include "imgIContainer.h"
1.24 +#include "nsIInputStream.h"
1.25 +
1.26 +
1.27 +//
1.28 +// nsImageToClipboard
1.29 +//
1.30 +// A utility class that takes an imgIContainer and does all the bitmap magic
1.31 +// to allow us to put it on the clipboard
1.32 +//
1.33 +class nsImageToClipboard
1.34 +{
1.35 +public:
1.36 + nsImageToClipboard(imgIContainer* aInImage, bool aWantDIBV5 = true);
1.37 + ~nsImageToClipboard();
1.38 +
1.39 + // Call to get the actual bits that go on the clipboard. If |nullptr|, the
1.40 + // setup operations have failed.
1.41 + //
1.42 + // NOTE: The caller owns the handle and must delete it with ::GlobalRelease()
1.43 + nsresult GetPicture ( HANDLE* outBits ) ;
1.44 +
1.45 +private:
1.46 +
1.47 + // Computes # of bytes needed by a bitmap with the specified attributes.
1.48 + int32_t CalcSize(int32_t aHeight, int32_t aColors, WORD aBitsPerPixel, int32_t aSpanBytes);
1.49 + int32_t CalcSpanLength(uint32_t aWidth, uint32_t aBitCount);
1.50 +
1.51 + // Do the work
1.52 + nsresult CreateFromImage ( imgIContainer* inImage, HANDLE* outBitmap );
1.53 +
1.54 + nsCOMPtr<imgIContainer> mImage; // the image we're working with
1.55 + bool mWantDIBV5;
1.56 +
1.57 +}; // class nsImageToClipboard
1.58 +
1.59 +
1.60 +struct bitFields {
1.61 + uint32_t red;
1.62 + uint32_t green;
1.63 + uint32_t blue;
1.64 + uint8_t redLeftShift;
1.65 + uint8_t redRightShift;
1.66 + uint8_t greenLeftShift;
1.67 + uint8_t greenRightShift;
1.68 + uint8_t blueLeftShift;
1.69 + uint8_t blueRightShift;
1.70 +};
1.71 +
1.72 +//
1.73 +// nsImageFromClipboard
1.74 +//
1.75 +// A utility class that takes a DIB from the win32 clipboard and does
1.76 +// all the bitmap magic to convert it to a PNG or a JPEG in the form of a nsIInputStream
1.77 +//
1.78 +class nsImageFromClipboard
1.79 +{
1.80 +public:
1.81 + nsImageFromClipboard () ;
1.82 + ~nsImageFromClipboard ( ) ;
1.83 +
1.84 + // Retrieve the newly created image
1.85 + nsresult GetEncodedImageStream (unsigned char * aClipboardData, const char * aMIMEFormat, nsIInputStream** outImage);
1.86 +
1.87 +private:
1.88 +
1.89 + void InvertRows(unsigned char * aInitialBuffer, uint32_t aSizeOfBuffer, uint32_t aNumBytesPerRow);
1.90 + nsresult ConvertColorBitMap(unsigned char * aInputBuffer, PBITMAPINFO pBitMapInfo, unsigned char * aOutBuffer);
1.91 + void CalcBitmask(uint32_t aMask, uint8_t& aBegin, uint8_t& aLength);
1.92 + void CalcBitShift(bitFields * aColorMask);
1.93 +
1.94 +}; // nsImageFromClipboard
1.95 +
1.96 +#endif
