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Lines Matching refs:gamma

338     // This is necessary because the gAMA chunk actually stores 1/gamma.
380     png_fixed_point gamma;
399         if (PNG_INFO_gAMA == png_get_gAMA_fixed(png_ptr, info_ptr, &gamma)) {
403             fn.fG = png_inverted_fixed_point_to_float(gamma);
408         // Default to sRGB gamma if the image has color space information,
409         // but does not specify gamma.
413     // Last, check for gamma.
414     if (PNG_INFO_gAMA == png_get_gAMA_fixed(png_ptr, info_ptr, &gamma)) {
418         fn.fG = png_inverted_fixed_point_to_float(gamma);