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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% CCCC L IIIII PPPP BBBB OOO AAA RRRR DDDD %
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% C L I P P B B O O A A R R D D %
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% C L I PPP BBBB O O AAAAA RRRR D D %
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% C L I P B B O O A A R R D D %
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% CCCC LLLLL IIIII P BBBB OOO A A R R DDDD %
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% %
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% %
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% Read/Write Windows Clipboard. %
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% %
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% Software Design %
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% Leonard Rosenthol %
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% May 2002 %
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% %
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% %
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% Copyright 1999-2021 ImageMagick Studio LLC, a non-profit organization %
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% dedicated to making software imaging solutions freely available. %
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% %
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% You may not use this file except in compliance with the License. You may %
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% obtain a copy of the License at %
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% %
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% https://imagemagick.org/script/license.php %
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% %
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% Unless required by applicable law or agreed to in writing, software %
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% distributed under the License is distributed on an "AS IS" BASIS, %
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% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
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% See the License for the specific language governing permissions and %
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% limitations under the License. %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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%
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*/
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/*
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Include declarations.
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*/
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#include "MagickCore/studio.h"
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#if defined(MAGICKCORE_WINGDI32_DELEGATE)
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# if defined(__CYGWIN__)
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# include <windows.h>
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# else
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/* All MinGW needs ... */
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# include "MagickCore/nt-base-private.h"
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# include <wingdi.h>
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# endif
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#endif
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#include "MagickCore/blob.h"
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#include "MagickCore/blob-private.h"
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#include "MagickCore/cache.h"
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#include "MagickCore/exception.h"
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#include "MagickCore/exception-private.h"
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#include "MagickCore/image.h"
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#include "MagickCore/image-private.h"
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#include "MagickCore/list.h"
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#include "MagickCore/magick.h"
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#include "MagickCore/memory_.h"
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#include "MagickCore/nt-feature.h"
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#include "MagickCore/pixel-accessor.h"
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#include "MagickCore/quantum-private.h"
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#include "MagickCore/static.h"
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#include "MagickCore/string_.h"
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#include "MagickCore/module.h"
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#define BMP_HEADER_SIZE 14
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/*
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Forward declarations.
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*/
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#if defined(MAGICKCORE_WINGDI32_DELEGATE)
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static MagickBooleanType
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WriteCLIPBOARDImage(const ImageInfo *,Image *,ExceptionInfo *);
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#endif
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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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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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% ReadCLIPBOARDImage() reads an image from the system clipboard and returns
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% it. It allocates the memory necessary for the new Image structure and
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% returns a pointer to the new image.
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%
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% The format of the ReadCLIPBOARDImage method is:
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%
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% Image *ReadCLIPBOARDImage(const ImageInfo *image_info,
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% ExceptionInfo exception)
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%
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% A description of each parameter follows:
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%
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% o image_info: the image info.
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%
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% o exception: return any errors or warnings in this structure.
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%
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*/
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#if defined(MAGICKCORE_WINGDI32_DELEGATE)
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static Image *ReadCLIPBOARDImage(const ImageInfo *image_info,
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ExceptionInfo *exception)
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{
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unsigned char
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*p;
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HANDLE
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clip_handle;
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Image
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*image;
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ImageInfo
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*read_info;
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LPVOID
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clip_mem;
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size_t
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clip_size,
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total_size;
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unsigned char
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offset;
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void
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*clip_data;
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assert(image_info != (const ImageInfo *) NULL);
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assert(image_info->signature == MagickCoreSignature);
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if (image_info->debug != MagickFalse)
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(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
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image_info->filename);
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assert(exception != (ExceptionInfo *) NULL);
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assert(exception->signature == MagickCoreSignature);
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image=AcquireImage(image_info,exception);
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if (!IsClipboardFormatAvailable(CF_DIB) &&
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!IsClipboardFormatAvailable(CF_DIBV5))
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ThrowReaderException(CoderError,"NoBitmapOnClipboard");
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if (!OpenClipboard(NULL))
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ThrowReaderException(CoderError,"UnableToReadImageData");
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clip_handle=GetClipboardData(CF_DIBV5);
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if (!clip_handle)
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clip_handle=GetClipboardData(CF_DIB);
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if ((clip_handle == NULL) || (clip_handle == INVALID_HANDLE_VALUE))
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{
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CloseClipboard();
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ThrowReaderException(CoderError,"UnableToReadImageData");
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}
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clip_size=(size_t) GlobalSize(clip_handle);
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total_size=clip_size+BMP_HEADER_SIZE;
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clip_data=AcquireMagickMemory(total_size);
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if (clip_data == (void *) NULL)
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{
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CloseClipboard();
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ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
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}
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clip_mem=GlobalLock(clip_handle);
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if (clip_mem == (LPVOID) NULL)
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{
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CloseClipboard();
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clip_data=RelinquishMagickMemory(clip_data);
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ThrowReaderException(CoderError,"UnableToReadImageData");
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}
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p=(unsigned char *) clip_data;
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p+=BMP_HEADER_SIZE;
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(void) memcpy(p,clip_mem,clip_size);
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(void) GlobalUnlock(clip_mem);
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(void) CloseClipboard();
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memset(clip_data,0,BMP_HEADER_SIZE);
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offset=p[0];
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if ((p[0] == 40) && (p[16] == BI_BITFIELDS))
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offset+=12;
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else
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{
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unsigned int
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image_size;
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image_size=(unsigned int) p[20];
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image_size|=(unsigned int) p[21] << 8;
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image_size|=(unsigned int) p[22] << 16;
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image_size|=(unsigned int) p[23] << 24;
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/* Hack for chrome where the offset seems to be incorrect */
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if (clip_size - offset - image_size == 12)
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offset+=12;
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}
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offset+=BMP_HEADER_SIZE;
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p-=BMP_HEADER_SIZE;
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p[0]='B';
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p[1]='M';
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p[2]=(unsigned char) total_size;
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p[3]=(unsigned char) (total_size >> 8);
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p[4]=(unsigned char) (total_size >> 16);
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p[5]=(unsigned char) (total_size >> 24);
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p[10]=offset;
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read_info=CloneImageInfo(image_info);
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(void) CopyMagickString(read_info->magick,"BMP",MagickPathExtent);
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image=BlobToImage(read_info,clip_data,total_size,exception);
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read_info=DestroyImageInfo(read_info);
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clip_data=RelinquishMagickMemory(clip_data);
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return(image);
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}
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#endif /* MAGICKCORE_WINGDI32_DELEGATE */
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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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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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% RegisterCLIPBOARDImage() adds attributes for the clipboard "image format" to
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% the list of supported formats. The attributes include the image format
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% tag, a method to read and/or write the format, whether the format
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% supports the saving of more than one frame to the same file or blob,
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% whether the format supports native in-memory I/O, and a brief
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% description of the format.
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%
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% The format of the RegisterCLIPBOARDImage method is:
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%
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% size_t RegisterCLIPBOARDImage(void)
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%
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*/
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ModuleExport size_t RegisterCLIPBOARDImage(void)
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{
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MagickInfo
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*entry;
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entry=AcquireMagickInfo("CLIPBOARD","CLIPBOARD","The system clipboard");
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#if defined(MAGICKCORE_WINGDI32_DELEGATE)
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entry->decoder=(DecodeImageHandler *) ReadCLIPBOARDImage;
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entry->encoder=(EncodeImageHandler *) WriteCLIPBOARDImage;
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#endif
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entry->flags^=CoderAdjoinFlag;
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entry->format_type=ImplicitFormatType;
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(void) RegisterMagickInfo(entry);
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return(MagickImageCoderSignature);
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}
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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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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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% UnregisterCLIPBOARDImage() removes format registrations made by the
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% RGB module from the list of supported formats.
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%
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% The format of the UnregisterCLIPBOARDImage method is:
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%
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% UnregisterCLIPBOARDImage(void)
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%
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*/
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ModuleExport void UnregisterCLIPBOARDImage(void)
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{
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(void) UnregisterMagickInfo("CLIPBOARD");
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}
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% W r i t e C L I P B O A R D I m a g e %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% WriteCLIPBOARDImage() writes an image to the system clipboard.
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%
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% The format of the WriteCLIPBOARDImage method is:
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%
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% MagickBooleanType WriteCLIPBOARDImage(const ImageInfo *image_info,
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% Image *image,ExceptionInfo *exception)
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%
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% A description of each parameter follows.
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%
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% o image_info: the image info.
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%
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% o image: The image.
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%
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% o exception: return any errors or warnings in this structure.
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%
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*/
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#if defined(MAGICKCORE_WINGDI32_DELEGATE)
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static MagickBooleanType WriteCLIPBOARDImage(const ImageInfo *image_info,
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Image *image,ExceptionInfo *exception)
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{
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HANDLE
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clip_handle;
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ImageInfo
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*write_info;
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LPVOID
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clip_mem;
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size_t
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length;
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unsigned char
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*p;
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void
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*clip_data;
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assert(image_info != (const ImageInfo *) NULL);
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assert(image_info->signature == MagickCoreSignature);
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assert(image != (Image *) NULL);
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assert(image->signature == MagickCoreSignature);
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if (image->debug != MagickFalse)
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(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
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if (SetImageStorageClass(image,DirectClass,exception) == MagickFalse)
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ThrowWriterException(CoderError,"UnableToWriteImageData");
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write_info=CloneImageInfo(image_info);
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if (image->alpha_trait == UndefinedPixelTrait)
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(void) CopyMagickString(write_info->magick,"BMP3",MagickPathExtent);
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else
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(void) CopyMagickString(write_info->magick,"BMP",MagickPathExtent);
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clip_data=ImageToBlob(write_info,image,&length,exception);
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write_info=DestroyImageInfo(write_info);
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if (clip_data == (void *) NULL)
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ThrowWriterException(CoderError,"UnableToWriteImageData");
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clip_handle=(HANDLE) GlobalAlloc(GMEM_MOVEABLE,length-BMP_HEADER_SIZE);
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if (clip_handle == (HANDLE) NULL)
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{
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clip_data=RelinquishMagickMemory(clip_data);
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ThrowWriterException(CoderError,"UnableToWriteImageData");
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}
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clip_mem=GlobalLock(clip_handle);
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if (clip_mem == (LPVOID) NULL)
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{
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(void) GlobalFree((HGLOBAL) clip_handle);
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clip_data=RelinquishMagickMemory(clip_data);
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ThrowWriterException(CoderError,"UnableToWriteImageData");
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}
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p=(unsigned char *) clip_data;
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p+=BMP_HEADER_SIZE;
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(void) memcpy(clip_mem,p,length-BMP_HEADER_SIZE);
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(void) GlobalUnlock(clip_mem);
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clip_data=RelinquishMagickMemory(clip_data);
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if (!OpenClipboard(NULL))
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{
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(void) GlobalFree((HGLOBAL) clip_handle);
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ThrowWriterException(CoderError,"UnableToWriteImageData");
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}
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(void) EmptyClipboard();
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if (image->alpha_trait == UndefinedPixelTrait)
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SetClipboardData(CF_DIB,clip_handle);
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else
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SetClipboardData(CF_DIBV5,clip_handle);
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(void) CloseClipboard();
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return(MagickTrue);
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}
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#endif /* MAGICKCORE_WINGDI32_DELEGATE */
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