public void setSRGBIntent(int SRGBIntent) {
        this.SRGBIntent = SRGBIntent;
        SRGBIntentSet = true;
    }
Sets the sRGB rendering intent to be stored with this image.
The legal values are 0 = Perceptual, 1 = Relative Colorimetric,
2 = Saturation, and 3 = Absolute Colorimetric.  Refer to the
PNG specification for information on these values.

<p> The 'sRGB' chunk will encode this information.
plugins/svg-plugin/batik-codec-fix/src/main/java/org/apache/batik/ext/awt/image/codec/png/PNGEncodeParam.java