/*
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% %
% SSSSS CCCC RRRR EEEEE EEEEE N N SSSSS H H OOO TTTTT %
% SS C R R E E NN N SS H H O O T %
% SSS C RRRR EEE EEE N N N SSS HHHHH O O T %
% SS C R R E E N NN SS H H O O T %
% SSSSS CCCC R R EEEEE EEEEE N N SSSSS H H OOO T %
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% Takes a screenshot from the monitor(s). %
% %
% Software Design %
% Dirk Lemstra %
% April 2014 %
% %
% %
% Copyright 1999-2019 ImageMagick Studio LLC, a non-profit organization %
% dedicated to making software imaging solutions freely available. %
% %
% You may not use this file except in compliance with the License. You may %
% obtain a copy of the License at %
% %
% https://imagemagick.org/script/license.php %
% %
% Unless required by applicable law or agreed to in writing, software %
% distributed under the License is distributed on an "AS IS" BASIS, %
% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
% See the License for the specific language governing permissions and %
% limitations under the License. %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%
*/
/*
Include declarations.
*/
#include "MagickCore/studio.h"
#if defined(MAGICKCORE_WINGDI32_DELEGATE)
# if defined(__CYGWIN__)
# include <windows.h>
# else
/* All MinGW needs ... */
# include "MagickCore/nt-base-private.h"
# include <wingdi.h>
# ifndef DISPLAY_DEVICE_ACTIVE
# define DISPLAY_DEVICE_ACTIVE 0x00000001
# endif
# endif
#endif
#include "MagickCore/blob.h"
#include "MagickCore/blob-private.h"
#include "MagickCore/cache.h"
#include "MagickCore/exception.h"
#include "MagickCore/exception-private.h"
#include "MagickCore/image.h"
#include "MagickCore/image-private.h"
#include "MagickCore/list.h"
#include "MagickCore/magick.h"
#include "MagickCore/memory_.h"
#include "MagickCore/module.h"
#include "MagickCore/nt-feature.h"
#include "MagickCore/option.h"
#include "MagickCore/pixel-accessor.h"
#include "MagickCore/quantum-private.h"
#include "MagickCore/static.h"
#include "MagickCore/string_.h"
#include "MagickCore/token.h"
#include "MagickCore/utility.h"
#include "MagickCore/xwindow.h"
#include "MagickCore/xwindow-private.h"
/*
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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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% ReadSCREENSHOTImage() Takes a screenshot from the monitor(s).
%
% The format of the ReadSCREENSHOTImage method is:
%
% Image *ReadXImage(const ImageInfo *image_info,ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image_info: the image info.
%
% o exception: return any errors or warnings in this structure.
%
*/
static Image *ReadSCREENSHOTImage(const ImageInfo *image_info,
ExceptionInfo *exception)
{
Image
*image;
assert(image_info->signature == MagickCoreSignature);
if (image_info->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
image_info->filename);
assert(exception != (ExceptionInfo *) NULL);
assert(exception->signature == MagickCoreSignature);
image=(Image *) NULL;
#if defined(MAGICKCORE_WINGDI32_DELEGATE)
{
BITMAPINFO
bmi;
DISPLAY_DEVICE
device;
HBITMAP
bitmap,
bitmapOld;
HDC
bitmapDC,
hDC;
Image
*screen;
int
i;
MagickBooleanType
status;
register Quantum
*q;
register ssize_t
x;
RGBQUAD
*p;
ssize_t
y;
assert(image_info != (const ImageInfo *) NULL);
i=0;
device.cb = sizeof(device);
image=(Image *) NULL;
while(EnumDisplayDevices(NULL,i,&device,0) && ++i)
{
if ((device.StateFlags & DISPLAY_DEVICE_ACTIVE) != DISPLAY_DEVICE_ACTIVE)
continue;
hDC=CreateDC(device.DeviceName,device.DeviceName,NULL,NULL);
if (hDC == (HDC) NULL)
ThrowReaderException(CoderError,"UnableToCreateDC");
screen=AcquireImage(image_info,exception);
screen->columns=(size_t) GetDeviceCaps(hDC,HORZRES);
screen->rows=(size_t) GetDeviceCaps(hDC,VERTRES);
screen->storage_class=DirectClass;
if (image == (Image *) NULL)
image=screen;
else
AppendImageToList(&image,screen);
status=SetImageExtent(screen,screen->columns,screen->rows,exception);
if (status == MagickFalse)
return(DestroyImageList(image));
bitmapDC=CreateCompatibleDC(hDC);
if (bitmapDC == (HDC) NULL)
{
DeleteDC(hDC);
ThrowReaderException(CoderError,"UnableToCreateDC");
}
(void) memset(&bmi,0,sizeof(BITMAPINFO));
bmi.bmiHeader.biSize=sizeof(BITMAPINFOHEADER);
bmi.bmiHeader.biWidth=(LONG) screen->columns;
bmi.bmiHeader.biHeight=(-1)*(LONG) screen->rows;
bmi.bmiHeader.biPlanes=1;
bmi.bmiHeader.biBitCount=32;
bmi.bmiHeader.biCompression=BI_RGB;
bitmap=CreateDIBSection(hDC,&bmi,DIB_RGB_COLORS,(void **) &p,NULL,0);
if (bitmap == (HBITMAP) NULL)
{
DeleteDC(hDC);
DeleteDC(bitmapDC);
ThrowReaderException(CoderError,"UnableToCreateBitmap");
}
bitmapOld=(HBITMAP) SelectObject(bitmapDC,bitmap);
if (bitmapOld == (HBITMAP) NULL)
{
DeleteDC(hDC);
DeleteDC(bitmapDC);
DeleteObject(bitmap);
ThrowReaderException(CoderError,"UnableToCreateBitmap");
}
BitBlt(bitmapDC,0,0,(int) screen->columns,(int) screen->rows,hDC,0,0,
SRCCOPY);
(void) SelectObject(bitmapDC,bitmapOld);
for (y=0; y < (ssize_t) screen->rows; y++)
{
q=QueueAuthenticPixels(screen,0,y,screen->columns,1,exception);
if (q == (Quantum *) NULL)
break;
for (x=0; x < (ssize_t) screen->columns; x++)
{
SetPixelRed(image,ScaleCharToQuantum(p->rgbRed),q);
SetPixelGreen(image,ScaleCharToQuantum(p->rgbGreen),q);
SetPixelBlue(image,ScaleCharToQuantum(p->rgbBlue),q);
SetPixelAlpha(image,OpaqueAlpha,q);
p++;
q+=GetPixelChannels(image);
}
if (SyncAuthenticPixels(screen,exception) == MagickFalse)
break;
}
DeleteDC(hDC);
DeleteDC(bitmapDC);
DeleteObject(bitmap);
}
}
#elif defined(MAGICKCORE_X11_DELEGATE)
{
const char
*option;
XImportInfo
ximage_info;
XGetImportInfo(&ximage_info);
option=GetImageOption(image_info,"x:screen");
if (option != (const char *) NULL)
ximage_info.screen=IsStringTrue(option);
option=GetImageOption(image_info,"x:silent");
if (option != (const char *) NULL)
ximage_info.silent=IsStringTrue(option);
image=XImportImage(image_info,&ximage_info,exception);
}
#endif
return(image);
}
/*
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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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%
% RegisterSCREENSHOTImage() adds attributes for the screen shot 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 RegisterScreenShotImage method is:
%
% size_t RegisterScreenShotImage(void)
%
*/
ModuleExport size_t RegisterSCREENSHOTImage(void)
{
MagickInfo
*entry;
entry=AcquireMagickInfo("SCREENSHOT","SCREENSHOT","Screen shot");
entry->decoder=(DecodeImageHandler *) ReadSCREENSHOTImage;
entry->format_type=ImplicitFormatType;
(void) RegisterMagickInfo(entry);
return(MagickImageCoderSignature);
}
/*
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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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% UnregisterScreenShotImage() removes format registrations made by the
% screen shot module from the list of supported formats.
%
% The format of the UnregisterSCREENSHOTImage method is:
%
% UnregisterSCREENSHOTImage(void)
%
*/
ModuleExport void UnregisterSCREENSHOTImage(void)
{
(void) UnregisterMagickInfo("SCREENSHOT");
}