SwfTagData ISwfTagVisitor <ISwfStreamWriter, SwfTagData> .Visit(DefineBitsJPEG4Tag tag, ISwfStreamWriter writer)
{
writer.WriteUInt16(tag.CharacterID);
writer.WriteUInt32((uint)tag.ImageData.Length);
writer.WriteUInt16(tag.DeblockParam);
writer.WriteBytes(tag.ImageData);
writer.WriteBytes(tag.BitmapAlphaData);
return(null);
}
SwfTagBase ISwfTagVisitor <ISwfStreamReader, SwfTagBase> .Visit(DefineBitsJPEG4Tag tag, ISwfStreamReader reader)
{
tag.CharacterID = reader.ReadUInt16();
var alphaDataOffset = reader.ReadUInt32();
tag.DeblockParam = reader.ReadUInt16();
tag.ImageData = reader.ReadBytes((int)alphaDataOffset);
tag.BitmapAlphaData = reader.ReadRest();
return(tag);
}
private ImageData GetDefineBitsJPEG4ImageData(DefineBitsJPEG4Tag defineBitsJPEG4)
{
var imageData = new ImageData();
imageData.characterID = defineBitsJPEG4.characterID;
bool isJpg = defineBitsJPEG4.imageData[0] == 0xFF && (defineBitsJPEG4.imageData[1] == 0xD8 || defineBitsJPEG4.imageData[1] == 0xD9);
bool isPng = defineBitsJPEG4.imageData[0] == 0x89 &&
defineBitsJPEG4.imageData[1] == 0x50 &&
defineBitsJPEG4.imageData[2] == 0x4E &&
defineBitsJPEG4.imageData[3] == 0x47 &&
defineBitsJPEG4.imageData[4] == 0x0D &&
defineBitsJPEG4.imageData[5] == 0x0A &&
defineBitsJPEG4.imageData[6] == 0x1A &&
defineBitsJPEG4.imageData[7] == 0x0A;
bool isGif = defineBitsJPEG4.imageData[0] == 0x47 &&
defineBitsJPEG4.imageData[1] == 0x49 &&
defineBitsJPEG4.imageData[2] == 0x46 &&
defineBitsJPEG4.imageData[3] == 0x38 &&
defineBitsJPEG4.imageData[4] == 0x39 &&
defineBitsJPEG4.imageData[5] == 0x61;
if (isPng)
{
imageData.type = ImageType.Png;
var texture = new Texture2D(16, 16); //宽高可以任意LoadImage()时会自动调整
texture.LoadImage(defineBitsJPEG4.imageData);
texture.Apply();
var colors = texture.GetPixels32();
var len = defineBitsJPEG4.bitmapAlphaData.Length;
var alphaData = new byte[len];
Array.Copy(defineBitsJPEG4.bitmapAlphaData, alphaData, len);
FlipVerticalBitmapAlphaData(alphaData, (ushort)texture.width, (ushort)texture.height);
for (var i = 0; i < len; i++)
{
colors[i].a = alphaData[i];
}
texture.SetPixels32(colors);
texture.Apply();
imageData.bytes = texture.EncodeToJPG(100);
}
else if (isJpg || isGif)
{
imageData.type = ImageType.Jpg; //.gif也导出为jpg
imageData.bytes = defineBitsJPEG4.imageData;
}
return(imageData);
}
ITagFormatter ISwfTagVisitor <object, ITagFormatter> .Visit(DefineBitsJPEG4Tag tag, object arg)
{
return(new DefineBitsJPEG4TagFormatter());
}
