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DEFINITIONS
This source file includes following definitions.
- ReadCLIPBOARDImage
- WriteCLIPBOARDImage
- RegisterCLIPBOARDImage
- UnregisterCLIPBOARDImage
/*
% Copyright (C) 2003 GraphicsMagick Group
% Copyright (C) 2002 ImageMagick Studio
%
% This program is covered by multiple licenses, which are described in
% Copyright.txt. You should have received a copy of Copyright.txt with this
% package; otherwise see http://www.graphicsmagick.org/www/Copyright.html.
%
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% %
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% Read/Write Windows Clipboard. %
% %
% %
% Software Design %
% Leonard Rosenthol %
% May 2002 %
% %
% %
% %
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%
%
*/
/*
Include declarations.
*/
#include "magick/studio.h"
#include "magick/nt_feature.h"
#include "magick/blob.h"
#include "magick/pixel_cache.h"
#include "magick/magick.h"
#include "magick/utility.h"
#if defined(HasWINGDI32)
# if defined(__CYGWIN__)
# include <windows.h>
# else
// All MinGW needs ...
# include <wingdi.h>
# endif
#endif
/*
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% R e a d C L I P B O A R D I m a g e %
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% Method ReadCLIPBOARDImage reads an image from the system clipboard and
% returns it. It allocates the memory necessary for the new Image structure
% and returns a pointer to the new image.
%
% The format of the ReadCLIPBOARDImage method is:
%
% Image *ReadCLIPBOARDImage(const ImageInfo *image_info,ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image: Method ReadCLIPBOARDImage returns a pointer to the image after
% reading. A null image is returned if there is a memory shortage or
% if the image cannot be read.
%
% o image_info: Specifies a pointer to a ImageInfo structure.
%
% o exception: return any errors or warnings in this structure.
%
%
*/
#if defined(HasWINGDI32)
static Image *ReadCLIPBOARDImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
Image
*image;
long
y;
register long
x;
register PixelPacket
*q;
assert(image_info != (const ImageInfo *) NULL);
assert(image_info->signature == MagickSignature);
assert(exception != (ExceptionInfo *) NULL);
assert(exception->signature == MagickSignature);
image=AllocateImage(image_info);
{
HBITMAP
bitmapH;
OpenClipboard( NULL );
bitmapH = GetClipboardData( CF_BITMAP );
CloseClipboard();
if ( bitmapH != NULL )
{
BITMAPINFO
DIBinfo;
BITMAP
bitmap;
HBITMAP
hBitmap,
hOldBitmap;
HDC
hDC,
hMemDC;
RGBQUAD
*pBits,
*ppBits;
// create an offscreen DC for the source
hMemDC = CreateCompatibleDC( NULL );
hOldBitmap = SelectObject( hMemDC, bitmapH );
GetObject( bitmapH, sizeof( BITMAP ), (LPSTR) &bitmap );
if ((image->columns == 0) || (image->rows == 0))
{
image->rows=bitmap.bmHeight;
image->columns=bitmap.bmWidth;
}
/*
Initialize the bitmap header info.
Create a temp DC for the DIB to go into
*/
(void) memset(&DIBinfo,0,sizeof(BITMAPINFO));
DIBinfo.bmiHeader.biSize=sizeof(BITMAPINFOHEADER);
DIBinfo.bmiHeader.biWidth=image->columns;
DIBinfo.bmiHeader.biHeight=(-1)*image->rows;
DIBinfo.bmiHeader.biPlanes=1;
DIBinfo.bmiHeader.biBitCount=32;
DIBinfo.bmiHeader.biCompression=BI_RGB;
hDC=GetDC(NULL);
if (!hDC)
ThrowReaderException(CoderError,UnableToCreateADC,image);
hBitmap= CreateDIBSection(hDC,&DIBinfo,DIB_RGB_COLORS,(void **) &ppBits,NULL,0);
ReleaseDC(NULL,hDC);
if (!hBitmap)
ThrowReaderException(CoderError,UnableToCreateBitmap,image);
// create an offscreen DC
hDC=CreateCompatibleDC(NULL);
if (!hDC)
{
DeleteObject(hBitmap);
ThrowReaderException(CoderError,UnableToCreateADC,image);
}
hOldBitmap=(HBITMAP) SelectObject(hDC,hBitmap);
if (!hOldBitmap)
{
DeleteDC(hDC);
DeleteObject(hBitmap);
ThrowReaderException(CoderError,UnableToCreateBitmap,image);
}
// bitblt from the memory to the DIB-based one
BitBlt( hDC, 0, 0, image->columns, image->rows, hMemDC, 0, 0, SRCCOPY );
// finally copy the pixels!
pBits=ppBits;
for (y=0; y < (long) image->rows; y++)
{
q=SetImagePixels(image,0,y,image->columns,1);
if (q == (PixelPacket *) NULL)
break;
for (x=0; x < (long) image->columns; x++)
{
q->red = ScaleCharToQuantum(pBits->rgbRed);
q->green = ScaleCharToQuantum(pBits->rgbGreen);
q->blue = ScaleCharToQuantum(pBits->rgbBlue);
q->opacity = OpaqueOpacity;
pBits++;
q++;
}
if (!SyncImagePixels(image))
break;
}
} else
ThrowReaderException(CoderError,NoBitmapOnClipboard,image);
}
CloseBlob(image);
return(image);
}
#endif /* HasWINGDI32 */
/*
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% Method WriteCLIPBOARDImage writes an image to the system clipboard.
%
% The format of the WriteCLIPBOARDImage method is:
%
% unsigned int WriteCLIPBOARDImage(const ImageInfo *image_info,Image *image)
%
% A description of each parameter follows.
%
% o status: Method WriteCLIPBOARDImage return True if the image is written.
% False is returned is there is a memory shortage or if the image file
% fails to write.
%
% o image_info: Specifies a pointer to a ImageInfo structure.
%
% o image: A pointer to an Image structure.
%
%
*/
#if defined(HasWINGDI32)
static unsigned int WriteCLIPBOARDImage(const ImageInfo *image_info,Image *image)
{
/*
Allocate memory for pixels.
*/
assert(image_info != (const ImageInfo *) NULL);
assert(image_info->signature == MagickSignature);
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
{
HBITMAP
bitmapH;
OpenClipboard( NULL );
EmptyClipboard();
bitmapH = ImageToHBITMAP(image);
SetClipboardData(CF_BITMAP, bitmapH);
CloseClipboard();
return(True);
}
return(False);
}
#endif /* HasWINGDI32 */
/*
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% R e g i s t e r C L I P B O A R D I m a g e %
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% Method RegisterCLIPBOARDImage adds attributes for the clipboard "image format" to
% the list of supported formats. The attributes include the image format
% tag, a method to read and/or write the format, whether the format
% supports the saving of more than one frame to the same file or blob,
% whether the format supports native in-memory I/O, and a brief
% description of the format.
%
% The format of the RegisterCLIPBOARDImage method is:
%
% RegisterCLIPBOARDImage(void)
%
*/
ModuleExport void RegisterCLIPBOARDImage(void)
{
#if defined(HasWINGDI32)
MagickInfo
*entry;
entry=SetMagickInfo("CLIPBOARD");
entry->decoder=(DecoderHandler) ReadCLIPBOARDImage;
entry->encoder=(EncoderHandler) WriteCLIPBOARDImage;
entry->adjoin = False;
entry->description="Windows System Clipboard";
entry->module="CLIPBOARD";
entry->extension_treatment=IgnoreExtensionTreatment;
(void) RegisterMagickInfo(entry);
#endif
}
/*
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% U n r e g i s t e r C L I P B O A R D I m a g e %
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% Method UnregisterCLIPBOARDImage removes format registrations made by the
% RGB module from the list of supported formats.
%
% The format of the UnregisterCLIPBOARDImage method is:
%
% UnregisterCLIPBOARDImage(void)
%
*/
ModuleExport void UnregisterCLIPBOARDImage(void)
{
#if defined(HasWINGDI32)
(void) UnregisterMagickInfo("CLIPBOARD");
#endif
}