Any light on how to extract UHQ (4K) Texture properly ?

From https://github.com/klensy/wt-tools/blob/dev/src/wt_tools/ddsx_unpack.py

if parsed_data.header.flags.FLG_REV_MIP_ORDER:
        # Reverse MIPMAP order (from smallest -> biggest to biggest -> smallest)
        if texture_format in [b'DXT1', b'DXT5']:
            # https://docs.microsoft.com/en-us/windows/win32/direct3ddds/dds-file-layout-for-textures
            def get_dxt1_size(t_width, t_height, dxt_version):
                dxt_size = max(1, (t_width + 3) // 4) * max(1, (t_height + 3) // 4)
                if dxt_version == b'DXT1':
                    return dxt_size * 8
                elif dxt_version == b'DXT5':
                    return dxt_size * 16
                else:
                    print("unknown dxt version: {}", dxt_version)
                    return

            pos = 0
            images = []
            for level in range(parsed_data.header.levels - 1, -1, -1):
                width = parsed_data.header.w // (2 ** level)
                height = parsed_data.header.h // (2 ** level)
                size = get_dxt1_size(width, height, texture_format)
                images.append(d_data[pos:pos + size])
                pos += size

            d_data = bytearray()
            for image in reversed(images):
                d_data.extend(image)

        elif parsed_data.header.levels > 1:
            # left unpacked data as is
            print("Dunno how to re-order mipmaps for format {}".format(texture_format))

klensy / wt-tools

Any light on how to extract UHQ (4K) Texture properly ? #86