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/* -*- 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
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