483   const unsigned char *previous_pixels,const unsigned char *pixels,  in PCLDeltaCompressImage()  argument
504       if (*pixels++ != *previous_pixels++)  in PCLDeltaCompressImage()
514       if (*pixels == *previous_pixels)  in PCLDeltaCompressImage()
517       previous_pixels++;  in PCLDeltaCompressImage()
692     *previous_pixels;  in WritePCLImage()  local
798     previous_pixels=(unsigned char *) NULL;  in WritePCLImage()
837         previous_pixels=(unsigned char *) AcquireQuantumMemory(length+1,  in WritePCLImage()
838           sizeof(*previous_pixels));  in WritePCLImage()
839         if (previous_pixels == (unsigned char *) NULL)  in WritePCLImage()
846         (void) memset(previous_pixels,0,(length+1)*  in WritePCLImage()
847           sizeof(*previous_pixels));  in WritePCLImage()
941               previous_pixels[i]=(~pixels[i]);  in WritePCLImage()
942           packets=PCLDeltaCompressImage(length,previous_pixels,pixels,  in WritePCLImage()
948           (void) memcpy(previous_pixels,pixels,length*  in WritePCLImage()
967         previous_pixels=(unsigned char *) RelinquishMagickMemory(  in WritePCLImage()
968           previous_pixels);  in WritePCLImage()