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package jogamp.opengl.util.pngj.chunks;
import java.io.ByteArrayInputStream;
import jogamp.opengl.util.pngj.ImageInfo;
import jogamp.opengl.util.pngj.PngHelperInternal;
import jogamp.opengl.util.pngj.PngjException;
/**
* IHDR chunk.
* <p>
* see http://www.w3.org/TR/PNG/#11IHDR
* <p>
* This is a special critical Chunk.
*/
public class PngChunkIHDR extends PngChunkSingle {
public final static String ID = ChunkHelper.IHDR;
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(final ImageInfo info) {
super(ID, info);
}
@Override
public ChunkOrderingConstraint getOrderingConstraint() {
return ChunkOrderingConstraint.NA;
}
@Override
public ChunkRaw createRawChunk() {
final ChunkRaw c = new ChunkRaw(13, ChunkHelper.b_IHDR, true);
int offset = 0;
PngHelperInternal.writeInt4tobytes(cols, c.data, offset);
offset += 4;
PngHelperInternal.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 parseFromRaw(final ChunkRaw c) {
if (c.len != 13)
throw new PngjException("Bad IDHR len " + c.len);
final ByteArrayInputStream st = c.getAsByteStream();
cols = PngHelperInternal.readInt4(st);
rows = PngHelperInternal.readInt4(st);
// bit depth: number of bits per channel
bitspc = PngHelperInternal.readByte(st);
colormodel = PngHelperInternal.readByte(st);
compmeth = PngHelperInternal.readByte(st);
filmeth = PngHelperInternal.readByte(st);
interlaced = PngHelperInternal.readByte(st);
}
@Override
public void cloneDataFromRead(final PngChunk other) {
final 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(final int cols) {
this.cols = cols;
}
public int getRows() {
return rows;
}
public void setRows(final int rows) {
this.rows = rows;
}
public int getBitspc() {
return bitspc;
}
public void setBitspc(final int bitspc) {
this.bitspc = bitspc;
}
public int getColormodel() {
return colormodel;
}
public void setColormodel(final int colormodel) {
this.colormodel = colormodel;
}
public int getCompmeth() {
return compmeth;
}
public void setCompmeth(final int compmeth) {
this.compmeth = compmeth;
}
public int getFilmeth() {
return filmeth;
}
public void setFilmeth(final int filmeth) {
this.filmeth = filmeth;
}
public int getInterlaced() {
return interlaced;
}
public void setInterlaced(final int interlaced) {
this.interlaced = interlaced;
}
}
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