153 %      MagickBooleanType IsBoundsCleared(const Image *image1,
158 %    o image1, image 2: the images to check for cleared pixels
165 static MagickBooleanType IsBoundsCleared(const Image *image1,  in IsBoundsCleared()  argument
182     p=GetVirtualPixels(image1,bounds->x,bounds->y+y,bounds->width,1,exception);  in IsBoundsCleared()
188       if ((GetPixelAlpha(image1,p) >= (Quantum) (QuantumRange/2)) &&  in IsBoundsCleared()
191       p+=GetPixelChannels(image1);  in IsBoundsCleared()
577 %        const Image *image1, const Image *image2, ExceptionInfo *exception)
584 %    o image1, image2: the two images to compare.
590 static RectangleInfo CompareImagesBounds(const Image *image1,  in CompareImagesBounds()  argument
613   GetPixelInfo(image1,&pixel1);  in CompareImagesBounds()
615   for (x=0; x < (ssize_t) image1->columns; x++)  in CompareImagesBounds()
617     p=GetVirtualPixels(image1,x,0,1,image1->rows,exception);  in CompareImagesBounds()
621     for (y=0; y < (ssize_t) image1->rows; y++)  in CompareImagesBounds()
623       GetPixelInfoPixel(image1,p,&pixel1);  in CompareImagesBounds()
627       p+=GetPixelChannels(image1);  in CompareImagesBounds()
630     if (y < (ssize_t) image1->rows)  in CompareImagesBounds()
633   if (x >= (ssize_t) image1->columns)  in CompareImagesBounds()
645   for (x=(ssize_t) image1->columns-1; x >= 0; x--)  in CompareImagesBounds()
647     p=GetVirtualPixels(image1,x,0,1,image1->rows,exception);  in CompareImagesBounds()
651     for (y=0; y < (ssize_t) image1->rows; y++)  in CompareImagesBounds()
653       GetPixelInfoPixel(image1,p,&pixel1);  in CompareImagesBounds()
657       p+=GetPixelChannels(image1);  in CompareImagesBounds()
660     if (y < (ssize_t) image1->rows)  in CompareImagesBounds()
664   for (y=0; y < (ssize_t) image1->rows; y++)  in CompareImagesBounds()
666     p=GetVirtualPixels(image1,0,y,image1->columns,1,exception);  in CompareImagesBounds()
670     for (x=0; x < (ssize_t) image1->columns; x++)  in CompareImagesBounds()
672       GetPixelInfoPixel(image1,p,&pixel1);  in CompareImagesBounds()
676       p+=GetPixelChannels(image1);  in CompareImagesBounds()
679     if (x < (ssize_t) image1->columns)  in CompareImagesBounds()
683   for (y=(ssize_t) image1->rows-1; y >= 0; y--)  in CompareImagesBounds()
685     p=GetVirtualPixels(image1,0,y,image1->columns,1,exception);  in CompareImagesBounds()
689     for (x=0; x < (ssize_t) image1->columns; x++)  in CompareImagesBounds()
691       GetPixelInfoPixel(image1,p,&pixel1);  in CompareImagesBounds()
695       p+=GetPixelChannels(image1);  in CompareImagesBounds()
698     if (x < (ssize_t) image1->columns)  in CompareImagesBounds()