215       int pixel_depth = pixel_depth_of_type(color_type, bit_depth);  in image_size_of_type()  local
219          if (pixel_depth <= 8) /* there will be one row */  in image_size_of_type()
220             return 1 << pixel_depth;  in image_size_of_type()
226       else if (pixel_depth < 8)  in image_size_of_type()
229       else if (pixel_depth > 16)  in image_size_of_type()
401       unsigned int pixel_depth = pixel_depth_of_type(color_type, bit_depth);  in generate_row()  local
407       switch (pixel_depth)  in generate_row()
504             assert(size_max == 255 && rowbytes == 256*(pixel_depth>>3));  in generate_row()
505             pixel_depth >>= 3; /* now in bytes */  in generate_row()
508                const size_t pixel_index = --rowbytes/pixel_depth;  in generate_row()
516                      rowbytes - pixel_index * pixel_depth;  in generate_row()
827          unsigned int pixel_depth =  in write_png()  local
830          if (pixel_depth <= 8U)  in write_png()
832             assert(size == (1U<<pixel_depth));  in write_png()