From 40830196070013432bc5f453eb31cfe4c64e0510 Mon Sep 17 00:00:00 2001
From: Sven Gothel <sgothel@jausoft.com>
Date: Sat, 7 Apr 2012 15:28:37 +0200
Subject: Merge PNGJ 0.85 into namespace

PNGJ Version 0.85  (1 April 2012)

Apache 2.0 License

http://code.google.com/p/pngj/

Merged code:
  - Changed namespace ar.com.hjg.pngj -> jogamp.opengl.util.pngj
    to avoid collision when using a different version of PNGJ.

  - Removed test and lossy packages and helper classes
    to reduce footprint.

License information is added in main LICENSE.txt file.
---
 .../opengl/util/pngj/chunks/PngChunkZTXT.java      | 62 ++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkZTXT.java

(limited to 'src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkZTXT.java')

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkZTXT.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkZTXT.java
new file mode 100644
index 000000000..fd6c08273
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkZTXT.java
@@ -0,0 +1,62 @@
+package jogamp.opengl.util.pngj.chunks;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+
+import jogamp.opengl.util.pngj.ImageInfo;
+import jogamp.opengl.util.pngj.PngHelper;
+import jogamp.opengl.util.pngj.PngjException;
+
+
+public class PngChunkZTXT extends PngChunkTextVar {
+	// http://www.w3.org/TR/PNG/#11zTXt
+	public PngChunkZTXT(ImageInfo info) {
+		super(ChunkHelper.zTXt, info);
+	}
+
+	@Override
+	public ChunkRaw createChunk() {
+		if (val.isEmpty() || key.isEmpty())
+			return null;
+		try {
+			ByteArrayOutputStream ba = new ByteArrayOutputStream();
+			ba.write(key.getBytes(PngHelper.charsetLatin1));
+			ba.write(0); // separator
+			ba.write(0); // compression method: 0
+			byte[] textbytes = ChunkHelper.compressBytes(val.getBytes(PngHelper.charsetLatin1), true);
+			ba.write(textbytes);
+			byte[] b = ba.toByteArray();
+			ChunkRaw chunk = createEmptyChunk(b.length, false);
+			chunk.data = b;
+			return chunk;
+		} catch (IOException e) {
+			throw new PngjException(e);
+		}
+	}
+
+	@Override
+	public void parseFromChunk(ChunkRaw c) {
+		int nullsep = -1;
+		for (int i = 0; i < c.data.length; i++) { // look for first zero
+			if (c.data[i] != 0)
+				continue;
+			nullsep = i;
+			break;
+		}
+		if (nullsep < 0 || nullsep > c.data.length - 2)
+			throw new PngjException("bad zTXt chunk: no separator found");
+		key = new String(c.data, 0, nullsep, PngHelper.charsetLatin1);
+		int compmet = (int) c.data[nullsep + 1];
+		if (compmet != 0)
+			throw new PngjException("bad zTXt chunk: unknown compression method");
+		byte[] uncomp = ChunkHelper.compressBytes(c.data, nullsep + 2, c.data.length - nullsep - 2, false); // uncompress
+		val = new String(uncomp, PngHelper.charsetLatin1);
+	}
+
+	@Override
+	public void cloneDataFromRead(PngChunk other) {
+		PngChunkZTXT otherx = (PngChunkZTXT) other;
+		key = otherx.key;
+		val = otherx.val;
+	}
+}
-- 
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