diff options
| author | Sven Gothel <[email protected]> | 2012-04-07 15:28:37 +0200 |
|---|---|---|
| committer | Sven Gothel <[email protected]> | 2012-04-07 15:28:37 +0200 |
| commit | 40830196070013432bc5f453eb31cfe4c64e0510 (patch) | |
| tree | ca31a1e1e27adf9996963176c4f92b84e25623e9 /src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkPHYS.java | |
| parent | 865c0588de57c9a020a435bc3f08be0f3f6ba162 (diff) | |
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.
Diffstat (limited to 'src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkPHYS.java')
| -rw-r--r-- | src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkPHYS.java | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkPHYS.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkPHYS.java new file mode 100644 index 000000000..47e2c492c --- /dev/null +++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkPHYS.java @@ -0,0 +1,108 @@ +package jogamp.opengl.util.pngj.chunks;
+
+import jogamp.opengl.util.pngj.ImageInfo;
+import jogamp.opengl.util.pngj.PngHelper;
+import jogamp.opengl.util.pngj.PngjException;
+
+public class PngChunkPHYS extends PngChunk {
+ // http://www.w3.org/TR/PNG/#11pHYs
+ private long pixelsxUnitX;
+ private long pixelsxUnitY;
+ private int units; // 0: unknown 1:metre
+
+ public PngChunkPHYS(ImageInfo info) {
+ super(ChunkHelper.pHYs, info);
+ }
+
+ @Override
+ public boolean mustGoBeforeIDAT() {
+ return true;
+ }
+
+ @Override
+ public ChunkRaw createChunk() {
+ ChunkRaw c = createEmptyChunk(9, true);
+ PngHelper.writeInt4tobytes((int) pixelsxUnitX, c.data, 0);
+ PngHelper.writeInt4tobytes((int) pixelsxUnitY, c.data, 4);
+ c.data[8] = (byte) units;
+ return c;
+ }
+
+ @Override
+ public void parseFromChunk(ChunkRaw chunk) {
+ if (chunk.len != 9)
+ throw new PngjException("bad chunk length " + chunk);
+ pixelsxUnitX = PngHelper.readInt4fromBytes(chunk.data, 0);
+ if (pixelsxUnitX < 0)
+ pixelsxUnitX += 0x100000000L;
+ pixelsxUnitY = PngHelper.readInt4fromBytes(chunk.data, 4);
+ if (pixelsxUnitY < 0)
+ pixelsxUnitY += 0x100000000L;
+ units = PngHelper.readInt1fromByte(chunk.data, 8);
+ }
+
+ @Override
+ public void cloneDataFromRead(PngChunk other) {
+ PngChunkPHYS otherx = (PngChunkPHYS) other;
+ this.pixelsxUnitX = otherx.pixelsxUnitX;
+ this.pixelsxUnitY = otherx.pixelsxUnitY;
+ this.units = otherx.units;
+ }
+
+ public long getPixelsxUnitX() {
+ return pixelsxUnitX;
+ }
+
+ public void setPixelsxUnitX(long pixelsxUnitX) {
+ this.pixelsxUnitX = pixelsxUnitX;
+ }
+
+ public long getPixelsxUnitY() {
+ return pixelsxUnitY;
+ }
+
+ public void setPixelsxUnitY(long pixelsxUnitY) {
+ this.pixelsxUnitY = pixelsxUnitY;
+ }
+
+ public int getUnits() {
+ return units;
+ }
+
+ public void setUnits(int units) {
+ this.units = units;
+ }
+
+ // special getters / setters
+
+ /**
+ * returns -1 if the physicial unit is unknown, or X-Y are not equal
+ */
+ public double getAsDpi() {
+ if (units != 1 || pixelsxUnitX != pixelsxUnitY)
+ return -1;
+ return ((double) pixelsxUnitX) * 0.0254;
+ }
+
+ /**
+ * returns -1 if the physicial unit is unknown
+ */
+ public double[] getAsDpi2() {
+ if (units != 1)
+ return new double[] { -1, -1 };
+ return new double[] { ((double) pixelsxUnitX) * 0.0254, ((double) pixelsxUnitY) * 0.0254 };
+ }
+
+ public void setAsDpi(double dpi) {
+ units = 1;
+ pixelsxUnitX = (long) (dpi / 0.0254 + 0.5);
+ pixelsxUnitY = pixelsxUnitX;
+ }
+
+ public void setAsDpi2(double dpix, double dpiy) {
+ units = 1;
+ pixelsxUnitX = (long) (dpix / 0.0254 + 0.5);
+ pixelsxUnitY = (long) (dpiy / 0.0254 + 0.5);
+ }
+
+}
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