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package jogamp.opengl.util.pngj.chunks;
import jogamp.opengl.util.pngj.ImageInfo;
import jogamp.opengl.util.pngj.PngHelperInternal;
import jogamp.opengl.util.pngj.PngjException;
/**
* cHRM chunk.
* <p>
* see http://www.w3.org/TR/PNG/#11cHRM
*/
public class PngChunkCHRM extends PngChunkSingle {
public final static String ID = ChunkHelper.cHRM;
// http://www.w3.org/TR/PNG/#11cHRM
private double whitex, whitey;
private double redx, redy;
private double greenx, greeny;
private double bluex, bluey;
public PngChunkCHRM(ImageInfo info) {
super(ID, info);
}
@Override
public ChunkOrderingConstraint getOrderingConstraint() {
return ChunkOrderingConstraint.AFTER_PLTE_BEFORE_IDAT;
}
@Override
public ChunkRaw createRawChunk() {
ChunkRaw c = null;
c = createEmptyChunk(32, true);
PngHelperInternal.writeInt4tobytes(PngHelperInternal.doubleToInt100000(whitex), c.data, 0);
PngHelperInternal.writeInt4tobytes(PngHelperInternal.doubleToInt100000(whitey), c.data, 4);
PngHelperInternal.writeInt4tobytes(PngHelperInternal.doubleToInt100000(redx), c.data, 8);
PngHelperInternal.writeInt4tobytes(PngHelperInternal.doubleToInt100000(redy), c.data, 12);
PngHelperInternal.writeInt4tobytes(PngHelperInternal.doubleToInt100000(greenx), c.data, 16);
PngHelperInternal.writeInt4tobytes(PngHelperInternal.doubleToInt100000(greeny), c.data, 20);
PngHelperInternal.writeInt4tobytes(PngHelperInternal.doubleToInt100000(bluex), c.data, 24);
PngHelperInternal.writeInt4tobytes(PngHelperInternal.doubleToInt100000(bluey), c.data, 28);
return c;
}
@Override
public void parseFromRaw(ChunkRaw c) {
if (c.len != 32)
throw new PngjException("bad chunk " + c);
whitex = PngHelperInternal.intToDouble100000(PngHelperInternal.readInt4fromBytes(c.data, 0));
whitey = PngHelperInternal.intToDouble100000(PngHelperInternal.readInt4fromBytes(c.data, 4));
redx = PngHelperInternal.intToDouble100000(PngHelperInternal.readInt4fromBytes(c.data, 8));
redy = PngHelperInternal.intToDouble100000(PngHelperInternal.readInt4fromBytes(c.data, 12));
greenx = PngHelperInternal.intToDouble100000(PngHelperInternal.readInt4fromBytes(c.data, 16));
greeny = PngHelperInternal.intToDouble100000(PngHelperInternal.readInt4fromBytes(c.data, 20));
bluex = PngHelperInternal.intToDouble100000(PngHelperInternal.readInt4fromBytes(c.data, 24));
bluey = PngHelperInternal.intToDouble100000(PngHelperInternal.readInt4fromBytes(c.data, 28));
}
@Override
public void cloneDataFromRead(PngChunk other) {
PngChunkCHRM otherx = (PngChunkCHRM) other;
whitex = otherx.whitex;
whitey = otherx.whitex;
redx = otherx.redx;
redy = otherx.redy;
greenx = otherx.greenx;
greeny = otherx.greeny;
bluex = otherx.bluex;
bluey = otherx.bluey;
}
public void setChromaticities(double whitex, double whitey, double redx, double redy, double greenx, double greeny,
double bluex, double bluey) {
this.whitex = whitex;
this.redx = redx;
this.greenx = greenx;
this.bluex = bluex;
this.whitey = whitey;
this.redy = redy;
this.greeny = greeny;
this.bluey = bluey;
}
public double[] getChromaticities() {
return new double[] { whitex, whitey, redx, redy, greenx, greeny, bluex, bluey };
}
}
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