public static void verticalMirror(TpcMipMap mipMap, int recordSize) {
byte[] dest = mipMap.getData();
int halfOfHeight = mipMap.getHeight() / 2;
int pitch = mipMap.getWidth() * recordSize;
for (int j = 0; j < halfOfHeight; j++) {
int index1 = j * pitch;
int index2 = (mipMap.getHeight() - j - 1) * pitch;
for (int i = 0; i < pitch; i++, index1++, index2++) {
byte t = dest[index1];
dest[index1] = dest[index2];
dest[index2] = t;
}
}
}
public void decompress(TpcTexture texture) throws IOException {
if (!texture.isCompressed()) {
return;
}
if (!(texture.getRawFormat() == TpcPixelFormatRaw.DXT1
|| texture.getRawFormat() == TpcPixelFormatRaw.DXT3
|| texture.getRawFormat() == TpcPixelFormatRaw.DXT5)) {
throw new IllegalArgumentException(
"Bad compression format "
+ texture.getRawFormat()
+ " in texture ["
+ texture.getName()
+ "]");
}
for (TpcMipMap mipMap : texture.getMipMaps()) {
ByteArrayInputStream src =
new ByteArrayInputStream(Arrays.copyOf(mipMap.getData(), mipMap.getData().length));
/* The DXT algorithms work on 4x4 pixel blocks. Textures smaller than one
* block will be padded, but larger textures need to be correctly aligned. */
byte[] result;
if (texture.getRawFormat() == TpcPixelFormatRaw.DXT1) {
result = decompressDxt1(texture, src);
mipMap.setData(result);
mipMap.setSize(mipMap.getWidth() * mipMap.getHeight() * 4);
} else if (texture.getRawFormat() == TpcPixelFormatRaw.DXT5) {
result = decompressDxt5(texture, src);
mipMap.setData(result);
mipMap.setSize(mipMap.getWidth() * mipMap.getHeight() * 4);
verticalMirror(mipMap, 4);
} else if (texture.getRawFormat() == TpcPixelFormatRaw.DXT3) {
throw new RuntimeException("DXT3 uncompression is not implemented yet");
} else {
throw new RuntimeException("Unknown compression");
}
}
texture.setCompressed(false);
texture.setDataType(PixelDataType.PixelDataType8);
texture.setFormat(TpcPixelFormat.RGBA);
texture.setRawFormat(TpcPixelFormatRaw.RGBA8);
texture.setMinDataSize(4);
}
private void convertFromBgr2RGBA(TpcMipMap mipMap) {
byte[] src = mipMap.getData();
byte[] dest = new byte[mipMap.getWidth() * mipMap.getHeight() * 4];
int destIndex = 0;
for (int i = 0; i < dest.length; i += 3, destIndex += 4) {
dest[destIndex + 0] = src[i + 2];
dest[destIndex + 1] = src[i + 1];
dest[destIndex + 2] = src[i + 0];
dest[destIndex + 3] = -1;
}
mipMap.setData(dest);
mipMap.setSize(dest.length);
verticalMirror(mipMap, 4);
}