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Diffstat (limited to 'src/jake2/imageio/WAL.java')
| -rw-r--r-- | src/jake2/imageio/WAL.java | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/src/jake2/imageio/WAL.java b/src/jake2/imageio/WAL.java new file mode 100644 index 0000000..1c499ef --- /dev/null +++ b/src/jake2/imageio/WAL.java @@ -0,0 +1,169 @@ +/* + * Created on Nov 18, 2003 + * + */ +package jake2.imageio; + +import java.io.UnsupportedEncodingException; +import java.nio.ByteBuffer; +import java.nio.ByteOrder; + +/** + * @author cwei + * + */ +public class WAL { + + public static final int HEADER_SIZE = 100; + + /* struct wal_header + { + char name[32]; // name of the texture + + uint32 width; // width (in pixels) of the largest mipmap level + uint32 height; // height (in pixels) of the largest mipmap level + + int32 offset[4]; // byte offset of the start of each of the 4 mipmap levels + + char next_name[32]; // name of the next texture in the animation + + uint32 flags; // ? + uint32 contents; // ? + uint32 value; // ? + }; + */ + public static class Header { + + // size of byte arrays + static final int NAME_SIZE = 32; + static final int OFFSET_SIZE = 4; + + String name; + int width; + int height; + int[] offset; // file offsets for the 4 mipmap images + String nextName; + int flags; // unused + int contents; // unused + int value; // unused + + public Header(byte[] headerBytes) { + if (headerBytes == null || headerBytes.length != HEADER_SIZE) { + throw new IllegalArgumentException("invalid quake2 wal header"); + } + + ByteBuffer b = ByteBuffer.wrap(headerBytes); + // is stored as little endian + b.order(ByteOrder.LITTLE_ENDIAN); + + byte[] tmp = new byte[NAME_SIZE]; + // fill header + + // name + b.get(tmp); + try { + name = new String(tmp, "ISO-8859-1"); + } catch (UnsupportedEncodingException e) { + name = new String(tmp); + } + // width + width = b.getInt(); + assert(width >= 0) : "unsigned int bug"; // true means ok. + // height + height = b.getInt(); + assert(height >= 0) : "unsigned int bug"; // true means ok. + // 4 offsets + offset = + new int[] { b.getInt(), b.getInt(), b.getInt(), b.getInt()}; + // nextName + b.get(tmp); + try { + nextName = new String(tmp, "ISO-8859-1"); + } catch (UnsupportedEncodingException e1) { + name = new String(tmp); + } + // unused entries + flags = b.getInt(); + contents = b.getInt(); + value = b.getInt(); + + // check some attributes + checkHeader(); + } + + private void checkHeader() { + // start of mipmaps + int mipmap0 = HEADER_SIZE; + int mipmap1 = mipmap0 + getWidth() * getHeight(); + int mipmap2 = mipmap1 + getWidth() / 2 * getHeight() / 2; + int mipmap3 = mipmap2 + getWidth() / 4 * getHeight() / 4; + + if (offset[0] != mipmap0 + || offset[1] != mipmap1 + || offset[2] != mipmap2 + || offset[3] != mipmap3) { + throw new IllegalArgumentException("invalid quake2 wal header"); + } + } + + /** + * @return + */ + public int getContents() { + return contents; + } + + /** + * @return + */ + public int getFlags() { + return flags; + } + + /** + * @return + */ + public int getHeight() { + return height; + } + + /** + * @return + */ + public String getName() { + return name; + } + + /** + * @return + */ + public String getNextName() { + return nextName; + } + + /** + * @return + */ + public int getOffset(int index) { + if (index < 0 || index > 3) { + throw new ArrayIndexOutOfBoundsException("mipmap offset range is 0 to 3"); + } + return offset[index]; + } + + /** + * @return + */ + public int getValue() { + return value; + } + + /** + * @return + */ + public int getWidth() { + return width; + } + + } +}
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