1265 png_write_sBIT(png_structrp png_ptr, png_const_color_8p sbit, int color_type)  in png_write_sBIT()  argument
1280       if (sbit->red == 0 || sbit->red > maxbits ||  in png_write_sBIT()
1281           sbit->green == 0 || sbit->green > maxbits ||  in png_write_sBIT()
1282           sbit->blue == 0 || sbit->blue > maxbits)  in png_write_sBIT()
1288       buf[0] = sbit->red;  in png_write_sBIT()
1289       buf[1] = sbit->green;  in png_write_sBIT()
1290       buf[2] = sbit->blue;  in png_write_sBIT()
1296       if (sbit->gray == 0 || sbit->gray > png_ptr->usr_bit_depth)  in png_write_sBIT()
1302       buf[0] = sbit->gray;  in png_write_sBIT()
1308       if (sbit->alpha == 0 || sbit->alpha > png_ptr->usr_bit_depth)  in png_write_sBIT()
1314       buf[size++] = sbit->alpha;  in png_write_sBIT()