fill_RGB_16bit 1241 libheif/heif_context.cc Error err = img->fill_RGB_16bit(bkg_color[0], bkg_color[1], bkg_color[2], bkg_color[3]); fill_RGB_16bit 91 libheif/heif_image.h Error fill_RGB_16bit(uint16_t r, uint16_t g, uint16_t b, uint16_t a);