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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% SSSSS CCCC RRRR EEEEE EEEEE N N SSSSS H H OOO TTTTT %
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% SS C R R E E NN N SS H H O O T %
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% SSS C RRRR EEE EEE N N N SSS HHHHH O O T %
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% SS C R R E E N NN SS H H O O T %
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% SSSSS CCCC R R EEEEE EEEEE N N SSSSS H H OOO T %
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% %
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% %
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% Takes a screenshot from the monitor(s). %
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% %
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% Software Design %
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% Dirk Lemstra %
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% April 2014 %
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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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# ifndef DISPLAY_DEVICE_ACTIVE
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# define DISPLAY_DEVICE_ACTIVE 0x00000001
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# endif
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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/module.h"
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#include "MagickCore/nt-feature.h"
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#include "MagickCore/option.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/token.h"
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#include "MagickCore/transform.h"
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#include "MagickCore/utility.h"
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#include "MagickCore/xwindow.h"
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#include "MagickCore/xwindow-private.h"
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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 S C R E E N S H O T 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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% ReadSCREENSHOTImage() Takes a screenshot from the monitor(s).
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%
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% The format of the ReadSCREENSHOTImage method is:
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%
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% Image *ReadXImage(const ImageInfo *image_info,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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static Image *ReadSCREENSHOTImage(const ImageInfo *image_info,
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ExceptionInfo *exception)
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{
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Image
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*image;
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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=(Image *) NULL;
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#if defined(MAGICKCORE_WINGDI32_DELEGATE)
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{
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BITMAPINFO
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bmi;
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DISPLAY_DEVICE
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device;
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HBITMAP
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bitmap,
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bitmapOld;
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HDC
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bitmapDC,
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hDC;
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Image
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*screen;
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int
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i;
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MagickBooleanType
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status;
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RectangleInfo
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geometry;
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Quantum
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*q;
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ssize_t
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x;
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RGBQUAD
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*p;
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ssize_t
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y;
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assert(image_info != (const ImageInfo *) NULL);
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i=0;
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device.cb = sizeof(device);
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image=(Image *) NULL;
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while(EnumDisplayDevices(NULL,i,&device,0) && ++i)
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{
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if ((device.StateFlags & DISPLAY_DEVICE_ACTIVE) != DISPLAY_DEVICE_ACTIVE)
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continue;
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hDC=CreateDC(device.DeviceName,device.DeviceName,NULL,NULL);
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if (hDC == (HDC) NULL)
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ThrowReaderException(CoderError,"UnableToCreateDC");
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screen=AcquireImage(image_info,exception);
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geometry.x=0;
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geometry.y=0;
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geometry.width=(size_t) GetDeviceCaps(hDC,HORZRES);
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geometry.height=(size_t) GetDeviceCaps(hDC,VERTRES);
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if (image_info->extract != (char *) NULL)
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{
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geometry.x=MagickMin(screen->extract_info.x,geometry.width);
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if (geometry.x < 0)
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{
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geometry.width=(size_t ) MagickMin(0,(ssize_t) geometry.width+
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geometry.x);
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geometry.x=0;
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}
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geometry.width=geometry.width-geometry.x;
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if (screen->columns > 0)
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geometry.width=MagickMin(geometry.width,screen->columns);
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geometry.y=MagickMin(screen->extract_info.y,geometry.height);
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if (geometry.y < 0)
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{
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geometry.width=(size_t ) MagickMin(0,(ssize_t) geometry.width+
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geometry.y);
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geometry.y=0;
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}
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geometry.height=geometry.height-geometry.y;
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if (screen->rows > 0)
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geometry.height=MagickMin(geometry.height,screen->rows);
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/* Reset extract to prevent cropping */
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*image_info->extract='\0';
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screen->extract_info.x=0;
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screen->extract_info.y=0;
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}
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if ((geometry.width == 0) || (geometry.height == 0))
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ThrowReaderException(OptionError,"InvalidGeometry");
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screen->columns=geometry.width;
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screen->rows=geometry.height;
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screen->storage_class=DirectClass;
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if (image == (Image *) NULL)
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image=screen;
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else
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AppendImageToList(&image,screen);
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status=SetImageExtent(screen,screen->columns,screen->rows,exception);
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if (status == MagickFalse)
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return(DestroyImageList(image));
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bitmapDC=CreateCompatibleDC(hDC);
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if (bitmapDC == (HDC) NULL)
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{
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DeleteDC(hDC);
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ThrowReaderException(CoderError,"UnableToCreateDC");
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}
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(void) memset(&bmi,0,sizeof(BITMAPINFO));
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bmi.bmiHeader.biSize=sizeof(BITMAPINFOHEADER);
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bmi.bmiHeader.biWidth=(LONG) screen->columns;
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bmi.bmiHeader.biHeight=(-1)*(LONG) screen->rows;
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bmi.bmiHeader.biPlanes=1;
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bmi.bmiHeader.biBitCount=32;
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bmi.bmiHeader.biCompression=BI_RGB;
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bitmap=CreateDIBSection(hDC,&bmi,DIB_RGB_COLORS,(void **) &p,NULL,0);
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if (bitmap == (HBITMAP) NULL)
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{
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DeleteDC(hDC);
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DeleteDC(bitmapDC);
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ThrowReaderException(CoderError,"UnableToCreateBitmap");
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}
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bitmapOld=(HBITMAP) SelectObject(bitmapDC,bitmap);
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if (bitmapOld == (HBITMAP) NULL)
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{
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DeleteDC(hDC);
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DeleteDC(bitmapDC);
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DeleteObject(bitmap);
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ThrowReaderException(CoderError,"UnableToCreateBitmap");
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}
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BitBlt(bitmapDC,0,0,(int) screen->columns,(int) screen->rows,hDC,
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geometry.x,geometry.y,SRCCOPY);
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(void) SelectObject(bitmapDC,bitmapOld);
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for (y=0; y < (ssize_t) screen->rows; y++)
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{
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q=QueueAuthenticPixels(screen,0,y,screen->columns,1,exception);
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if (q == (Quantum *) NULL)
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break;
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for (x=0; x < (ssize_t) screen->columns; x++)
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{
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SetPixelRed(screen,ScaleCharToQuantum(p->rgbRed),q);
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SetPixelGreen(screen,ScaleCharToQuantum(p->rgbGreen),q);
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SetPixelBlue(screen,ScaleCharToQuantum(p->rgbBlue),q);
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SetPixelAlpha(screen,OpaqueAlpha,q);
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p++;
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q+=GetPixelChannels(screen);
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}
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if (SyncAuthenticPixels(screen,exception) == MagickFalse)
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break;
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}
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DeleteDC(hDC);
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DeleteDC(bitmapDC);
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DeleteObject(bitmap);
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}
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}
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#elif defined(MAGICKCORE_X11_DELEGATE)
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{
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const char
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*option;
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XImportInfo
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ximage_info;
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XGetImportInfo(&ximage_info);
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option=GetImageOption(image_info,"x:screen");
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if (option != (const char *) NULL)
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ximage_info.screen=IsStringTrue(option);
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option=GetImageOption(image_info,"x:silent");
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if (option != (const char *) NULL)
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ximage_info.silent=IsStringTrue(option);
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image=XImportImage(image_info,&ximage_info,exception);
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if ((image != (Image *) NULL) && (image_info->extract != (char *) NULL))
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{
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Image
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*crop_image;
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RectangleInfo
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crop_info;
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/*
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Crop image as defined by the extract rectangle.
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*/
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(void) ParsePageGeometry(image,image_info->extract,&crop_info,
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exception);
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crop_image=CropImage(image,&crop_info,exception);
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if (crop_image != (Image *) NULL)
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{
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image=DestroyImage(image);
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image=crop_image;
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}
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}
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}
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#endif
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return(image);
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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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% R e g i s t e r S C R E E N S H O T 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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% RegisterSCREENSHOTImage() adds attributes for the screen shot 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 RegisterScreenShotImage method is:
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%
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% size_t RegisterScreenShotImage(void)
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%
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*/
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ModuleExport size_t RegisterSCREENSHOTImage(void)
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{
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MagickInfo
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*entry;
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entry=AcquireMagickInfo("SCREENSHOT","SCREENSHOT","Screen shot");
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entry->decoder=(DecodeImageHandler *) ReadSCREENSHOTImage;
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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 S C R E E N S H O T 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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% UnregisterScreenShotImage() removes format registrations made by the
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% screen shot module from the list of supported formats.
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%
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% The format of the UnregisterSCREENSHOTImage method is:
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%
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% UnregisterSCREENSHOTImage(void)
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%
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*/
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ModuleExport void UnregisterSCREENSHOTImage(void)
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{
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(void) UnregisterMagickInfo("SCREENSHOT");
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}
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