function getPNGData()
{
$tag_code = $this->code;
if ($tag_code != 20 && $tag_code != 36) {
// DefineBitsLossless2
return false;
}
if (!$this->parseTagContent()) {
return false;
}
$cid = $this->tag->_CharacterID;
$format = $this->tag->_BitmapFormat;
$width = $this->tag->_BitmapWidth;
$height = $this->tag->_BitmapHeight;
$lossless_bitmap_data = gzuncompress($this->tag->_ZlibBitmapData);
if ($format == 3) {
$palette_num = $this->tag->_BitmapColorTableSize;
if ($tag_code == 20) {
// DefineBisLossless
$palette_bytesize = 3 * $palette_num;
} else {
$palette_bytesize = 4 * $palette_num;
}
$palette_data = substr($lossless_bitmap_data, 0, $palette_bytesize);
$lossless_bitmap_data = substr($lossless_bitmap_data, $palette_bytesize);
} else {
$palette_num = 0;
$palette_data = null;
}
$png_data = IO_SWF_Lossless::Lossless2PNG($tag_code, $format, $width, $height, $palette_num, $palette_data, $lossless_bitmap_data);
return $png_data;
}
$lossless_bitmap_data = gzuncompress($tag->tag->_ZlibBitmapData);
if ($format == 3) {
$palette_num = $tag->tag->_BitmapColorTableSize;
if ($tag_code == 20) {
// DefineBisLossless
$palette_bytesize = 3 * $palette_num;
} else {
$palette_bytesize = 4 * $palette_num;
}
$palette_data = substr($lossless_bitmap_data, 0, $palette_bytesize);
$lossless_bitmap_data = substr($lossless_bitmap_data, $palette_bytesize);
} else {
$palette_num = 0;
$palette_data = null;
}
$png_data = IO_SWF_Lossless::Lossless2PNG($tag_code, $format, $width, $height, $palette_num, $palette_data, $lossless_bitmap_data);
$jpeg_tag = new IO_SWF_Tag_Jpeg();
$jpeg_tag->code = 21;
// DefineBitsJPEG2
$jpeg_tag->_CharacterID = $cid;
$jpeg_tag->_JPEGData = $png_data;
// SWF8 spec
$tag->code = 21;
// DefineBitsJPEG2
$tag->tag = $jpeg_tag;
$tag->content = null;
}
}
}
echo $swf->build();
exit(0);