int
Tagimage::getPixel( int x, int y )
{
PixelPacket pixel = GetOnePixel( image, x, y);
return ( pixel.red + pixel.green + pixel.blue );
}
at_bitmap_type input_magick_reader(at_string filename,
at_input_opts_type * opts,
at_msg_func msg_func,
at_address msg_data)
{
Image *image = NULL;
ImageInfo *image_info;
ImageType image_type;
unsigned int i,j,point,np,runcount;
at_bitmap_type bitmap;
PixelPacket p;
PixelPacket *pixel=&p;
ExceptionInfo exception;
#if (MagickLibVersion < 0x0538)
MagickIncarnate("");
#else
InitializeMagick("");
#endif
GetExceptionInfo(&exception);
image_info=CloneImageInfo((ImageInfo *) NULL);
(void) strcpy(image_info->filename,filename);
image_info->antialias = 0;
image=ReadImage(image_info,&exception);
if (image == (Image *) NULL) {
#if (MagickLibVersion <= 0x0525)
/* MagickError(exception.severity,exception.message,exception.qualifier); */
if (msg_func)
msg_func (exception.qualifier, AT_MSG_FATAL, msg_data);
goto cleanup;
#else
/* MagickError(exception.severity,exception.reason,exception.description); */
if (msg_func)
msg_func (exception.reason, AT_MSG_FATAL, msg_data);
goto cleanup;
#endif
}
#if (MagickLibVersion < 0x0540)
image_type=GetImageType(image);
#else
image_type=GetImageType(image, &exception);
#endif
if(image_type == BilevelType || image_type == GrayscaleType)
np=1;
else
np=3;
bitmap = at_bitmap_init(NULL, image->columns, image->rows, np);
for(j=0,runcount=0,point=0;j<image->rows;j++)
for(i=0;i<image->columns;i++) {
p=GetOnePixel(image,i,j);
AT_BITMAP_BITS(bitmap)[point++]=pixel->red; /* if gray: red=green=blue */
if(np==3) {
AT_BITMAP_BITS(bitmap)[point++]=pixel->green;
AT_BITMAP_BITS(bitmap)[point++]=pixel->blue;
}
}
DestroyImage(image);
cleanup:
DestroyImageInfo(image_info);
return(bitmap);
}
