1 files changed, 126 insertions, 0 deletions
diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkIHDR.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkIHDR.java
new file mode 100644
index 000000000..fcb4150ff
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkIHDR.java
@@ -0,0 +1,126 @@
+package jogamp.opengl.util.pngj.chunks;
+
+import java.io.ByteArrayInputStream;
+
+import jogamp.opengl.util.pngj.ImageInfo;
+import jogamp.opengl.util.pngj.PngHelper;
+import jogamp.opengl.util.pngj.PngjException;
+
+
+/**
+ * this is a special chunk!
+ */
+public class PngChunkIHDR extends PngChunk {
+	private int cols;
+	private int rows;
+	private int bitspc;
+	private int colormodel;
+	private int compmeth;
+	private int filmeth;
+	private int interlaced;
+
+	// http://www.w3.org/TR/PNG/#11IHDR
+	//
+	public PngChunkIHDR(ImageInfo info) {
+		super(ChunkHelper.IHDR, info);
+	}
+
+	@Override
+	public ChunkRaw createChunk() {
+		ChunkRaw c = new ChunkRaw(13, ChunkHelper.b_IHDR, true);
+		int offset = 0;
+		PngHelper.writeInt4tobytes(cols, c.data, offset);
+		offset += 4;
+		PngHelper.writeInt4tobytes(rows, c.data, offset);
+		offset += 4;
+		c.data[offset++] = (byte) bitspc;
+		c.data[offset++] = (byte) colormodel;
+		c.data[offset++] = (byte) compmeth;
+		c.data[offset++] = (byte) filmeth;
+		c.data[offset++] = (byte) interlaced;
+		return c;
+	}
+
+	@Override
+	public void parseFromChunk(ChunkRaw c) {
+		if (c.len != 13)
+			throw new PngjException("Bad IDHR len " + c.len);
+		ByteArrayInputStream st = c.getAsByteStream();
+		cols = PngHelper.readInt4(st);
+		rows = PngHelper.readInt4(st);
+		// bit depth: number of bits per channel
+		bitspc = PngHelper.readByte(st);
+		colormodel = PngHelper.readByte(st);
+		compmeth = PngHelper.readByte(st);
+		filmeth = PngHelper.readByte(st);
+		interlaced = PngHelper.readByte(st);
+	}
+
+	@Override
+	public void cloneDataFromRead(PngChunk other) {
+		PngChunkIHDR otherx = (PngChunkIHDR) other;
+		cols = otherx.cols;
+		rows = otherx.rows;
+		bitspc = otherx.bitspc;
+		colormodel = otherx.colormodel;
+		compmeth = otherx.compmeth;
+		filmeth = otherx.filmeth;
+		interlaced = otherx.interlaced;
+	}
+
+	public int getCols() {
+		return cols;
+	}
+
+	public void setCols(int cols) {
+		this.cols = cols;
+	}
+
+	public int getRows() {
+		return rows;
+	}
+
+	public void setRows(int rows) {
+		this.rows = rows;
+	}
+
+	public int getBitspc() {
+		return bitspc;
+	}
+
+	public void setBitspc(int bitspc) {
+		this.bitspc = bitspc;
+	}
+
+	public int getColormodel() {
+		return colormodel;
+	}
+
+	public void setColormodel(int colormodel) {
+		this.colormodel = colormodel;
+	}
+
+	public int getCompmeth() {
+		return compmeth;
+	}
+
+	public void setCompmeth(int compmeth) {
+		this.compmeth = compmeth;
+	}
+
+	public int getFilmeth() {
+		return filmeth;
+	}
+
+	public void setFilmeth(int filmeth) {
+		this.filmeth = filmeth;
+	}
+
+	public int getInterlaced() {
+		return interlaced;
+	}
+
+	public void setInterlaced(int interlaced) {
+		this.interlaced = interlaced;
+	}
+}