public static void AssignImageToTexture(Bitmap sourceImage, AssetsChanger.Texture2DObject targetTexture, int targetWidth, int targetHeight, int targetMips = Int32.MaxValue, TextureConversionFormat format = TextureConversionFormat.Auto)
{
//right now "Auto" is always RGB24. Probably will automatically decide based on image size, but doing ETC2 sucks at the moment
int mips;
byte[] textureBytes;
if (format == TextureConversionFormat.ETC2_RGB)
{
textureBytes = ConvertToETC2AndMipmap(sourceImage, targetWidth, targetHeight, targetMips, out mips);
targetTexture.TextureFormat = Texture2DObject.TextureFormatType.ETC2_RGB;
}
else //always fall back to RGB24
{
textureBytes = ConvertToRGBAndMipmap(sourceImage, targetWidth, targetHeight, targetMips, out mips);
targetTexture.TextureFormat = AssetsChanger.Texture2DObject.TextureFormatType.RGB24;
}
targetTexture.ForcedFallbackFormat = 4;
targetTexture.DownscaleFallback = false;
targetTexture.Width = targetWidth;
targetTexture.Height = targetHeight;
targetTexture.CompleteImageSize = textureBytes.Length;
targetTexture.MipCount = mips;
targetTexture.IsReadable = false;
targetTexture.StreamingMipmaps = false;
targetTexture.StreamingMipmapsPriority = 0;
targetTexture.ImageCount = 1;
targetTexture.TextureDimension = 2;
targetTexture.TextureSettings = new GLTextureSettings()
{
FilterMode = 2,
Aniso = 1,
MipBias = -1,
WrapU = 1,
WrapV = 1,
WrapW = 0
};
targetTexture.LightmapFormat = 6;
targetTexture.ColorSpace = 1;
targetTexture.ImageData = textureBytes;
targetTexture.StreamData = new StreamingInfo()
{
offset = 0,
size = 0,
path = ""
};
}
public static Bitmap TextureToBitmap(AssetsChanger.Texture2DObject texture)
{
//does unity store mips of compressed textures individually, or does it compress the entire thing?
switch (texture.TextureFormat)
{
case AssetsChanger.Texture2DObject.TextureFormatType.RGB24:
return(ConvertFromRGB24ToBitmap(texture.ImageData, texture.Width, texture.Height, RotateFlipType.RotateNoneFlipXY));
//not really sure if it can do all these or not
case AssetsChanger.Texture2DObject.TextureFormatType.ETC2_RGB:
case AssetsChanger.Texture2DObject.TextureFormatType.ETC_RGB4:
case AssetsChanger.Texture2DObject.TextureFormatType.ETC2_RGBA8:
case AssetsChanger.Texture2DObject.TextureFormatType.ETC2_RGBA1:
return(ConvertETC2ToBitmap(texture.ImageData, texture.Width, texture.Height));
default:
throw new NotImplementedException($"Texture type {texture.ToString()} isn't currently supported.");
}
}
