mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-07 20:17:37 +00:00
88 lines
2.5 KiB
C++
88 lines
2.5 KiB
C++
/* -*- 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/. */
|
|
|
|
/* 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* inImage );
|
|
~nsImageToClipboard();
|
|
|
|
// Call to get the actual bits that go on the clipboard. If |nsnull|, 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.
|
|
PRInt32 CalcSize(PRInt32 aHeight, PRInt32 aColors, WORD aBitsPerPixel, PRInt32 aSpanBytes);
|
|
PRInt32 CalcSpanLength(PRUint32 aWidth, PRUint32 aBitCount);
|
|
|
|
// Do the work
|
|
nsresult CreateFromImage ( imgIContainer* inImage, HANDLE* outBitmap );
|
|
|
|
nsCOMPtr<imgIContainer> mImage; // the image we're working with
|
|
|
|
}; // class nsImageToClipboard
|
|
|
|
|
|
struct bitFields {
|
|
PRUint32 red;
|
|
PRUint32 green;
|
|
PRUint32 blue;
|
|
PRUint8 redLeftShift;
|
|
PRUint8 redRightShift;
|
|
PRUint8 greenLeftShift;
|
|
PRUint8 greenRightShift;
|
|
PRUint8 blueLeftShift;
|
|
PRUint8 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, PRUint32 aSizeOfBuffer, PRUint32 aNumBytesPerRow);
|
|
nsresult ConvertColorBitMap(unsigned char * aInputBuffer, PBITMAPINFO pBitMapInfo, unsigned char * aOutBuffer);
|
|
void CalcBitmask(PRUint32 aMask, PRUint8& aBegin, PRUint8& aLength);
|
|
void CalcBitShift(bitFields * aColorMask);
|
|
|
|
}; // nsImageFromClipboard
|