3392     *linear_image,  in ShadeImage()  local
3416   linear_image=CloneImage(image,0,0,MagickTrue,exception);  in ShadeImage()
3418   if ((linear_image == (Image *) NULL) || (shade_image == (Image *) NULL))  in ShadeImage()
3420       if (linear_image != (Image *) NULL)  in ShadeImage()
3421         linear_image=DestroyImage(linear_image);  in ShadeImage()
3428       linear_image=DestroyImage(linear_image);  in ShadeImage()
3445   image_view=AcquireVirtualCacheView(linear_image,exception);  in ShadeImage()
3449     magick_threads(linear_image,shade_image,linear_image->rows,1)  in ShadeImage()
3451   for (y=0; y < (ssize_t) linear_image->rows; y++)  in ShadeImage()
3475     p=GetCacheViewVirtualPixels(image_view,-1,y-1,linear_image->columns+2,3,  in ShadeImage()
3488     for (x=0; x < (ssize_t) linear_image->columns; x++)  in ShadeImage()
3496       pre=p+GetPixelChannels(linear_image);  in ShadeImage()
3497       center=pre+(linear_image->columns+2)*GetPixelChannels(linear_image);  in ShadeImage()
3498       post=center+(linear_image->columns+2)*GetPixelChannels(linear_image);  in ShadeImage()
3500         GetPixelIntensity(linear_image,pre-GetPixelChannels(linear_image))+  in ShadeImage()
3501         GetPixelIntensity(linear_image,center-GetPixelChannels(linear_image))+  in ShadeImage()
3502         GetPixelIntensity(linear_image,post-GetPixelChannels(linear_image))-  in ShadeImage()
3503         GetPixelIntensity(linear_image,pre+GetPixelChannels(linear_image))-  in ShadeImage()
3504         GetPixelIntensity(linear_image,center+GetPixelChannels(linear_image))-  in ShadeImage()
3505         GetPixelIntensity(linear_image,post+GetPixelChannels(linear_image)));  in ShadeImage()
3507         GetPixelIntensity(linear_image,post-GetPixelChannels(linear_image))+  in ShadeImage()
3508         GetPixelIntensity(linear_image,post)+  in ShadeImage()
3509         GetPixelIntensity(linear_image,post+GetPixelChannels(linear_image))-  in ShadeImage()
3510         GetPixelIntensity(linear_image,pre-GetPixelChannels(linear_image))-  in ShadeImage()
3511         GetPixelIntensity(linear_image,pre)-  in ShadeImage()
3512         GetPixelIntensity(linear_image,pre+GetPixelChannels(linear_image)));  in ShadeImage()
3528       for (i=0; i < (ssize_t) GetPixelChannels(linear_image); i++)  in ShadeImage()
3537         channel=GetPixelChannelChannel(linear_image,i);  in ShadeImage()
3538         traits=GetPixelChannelTraits(linear_image,channel);  in ShadeImage()
3544             (GetPixelReadMask(linear_image,center) == 0))  in ShadeImage()
3562       p+=GetPixelChannels(linear_image);  in ShadeImage()
3582   linear_image=DestroyImage(linear_image);  in ShadeImage()