diff options
Diffstat (limited to 'src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkITXT.java')
| -rw-r--r-- | src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkITXT.java | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkITXT.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkITXT.java new file mode 100644 index 000000000..4e5c7c74a --- /dev/null +++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkITXT.java @@ -0,0 +1,119 @@ +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;
+
+
+/**
+ * UNTESTED!
+ */
+public class PngChunkITXT extends PngChunkTextVar {
+
+ private boolean compressed = false;
+ private String langTag = "";
+ private String translatedTag = "";
+
+ // http://www.w3.org/TR/PNG/#11iTXt
+ public PngChunkITXT(ImageInfo info) {
+ super(ChunkHelper.iTXt, 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(compressed ? 1 : 0);
+ ba.write(0); // compression method (always 0)
+ ba.write(langTag.getBytes(PngHelper.charsetUTF8));
+ ba.write(0); // separator
+ ba.write(translatedTag.getBytes(PngHelper.charsetUTF8));
+ ba.write(0); // separator
+ byte[] textbytes = val.getBytes(PngHelper.charsetUTF8);
+ if (compressed) {
+ textbytes = ChunkHelper.compressBytes(textbytes, 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 nullsFound = 0;
+ int[] nullsIdx = new int[3];
+ for (int i = 0; i < c.data.length; i++) {
+ if (c.data[i] != 0)
+ continue;
+ nullsIdx[nullsFound] = i;
+ nullsFound++;
+ if (nullsFound == 1)
+ i += 2;
+ if (nullsFound == 3)
+ break;
+ }
+ if (nullsFound != 3)
+ throw new PngjException("Bad formed PngChunkITXT chunk");
+ key = new String(c.data, 0, nullsIdx[0], PngHelper.charsetLatin1);
+ int i = nullsIdx[0] + 1;
+ compressed = c.data[i] == 0 ? false : true;
+ i++;
+ if (compressed && c.data[i] != 0)
+ throw new PngjException("Bad formed PngChunkITXT chunk - bad compression method ");
+ langTag = new String(c.data, i, nullsIdx[1] - i, PngHelper.charsetLatin1);
+ translatedTag = new String(c.data, nullsIdx[1] + 1, nullsIdx[2] - nullsIdx[1] - 1, PngHelper.charsetUTF8);
+ i = nullsIdx[2] + 1;
+ if (compressed) {
+ byte[] bytes = ChunkHelper.compressBytes(c.data, i, c.data.length - i, false);
+ val = new String(bytes, PngHelper.charsetUTF8);
+ } else {
+ val = new String(c.data, i, c.data.length - i, PngHelper.charsetUTF8);
+ }
+ }
+
+ @Override
+ public void cloneDataFromRead(PngChunk other) {
+ PngChunkITXT otherx = (PngChunkITXT) other;
+ key = otherx.key;
+ val = otherx.val;
+ compressed = otherx.compressed;
+ langTag = otherx.langTag;
+ translatedTag = otherx.translatedTag;
+ }
+
+ public boolean isCompressed() {
+ return compressed;
+ }
+
+ public void setCompressed(boolean compressed) {
+ this.compressed = compressed;
+ }
+
+ public String getLangtag() {
+ return langTag;
+ }
+
+ public void setLangtag(String langtag) {
+ this.langTag = langtag;
+ }
+
+ public String getTranslatedTag() {
+ return translatedTag;
+ }
+
+ public void setTranslatedTag(String translatedTag) {
+ this.translatedTag = translatedTag;
+ }
+}
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