public static byte[] TextureEncodeToPNG(this Texture @this, TextureConvert convert = TextureConvert.None,
TextureFormat pngFormat = TextureFormat.RGBA32)
{
if (convert == TextureConvert.None)
{
if (@this is Texture2D)
{
var tex0 = @this as Texture2D;
int channelsActual = tex0.format.Channels();
int channelsExpect = pngFormat.Channels();
if (!(channelsActual == channelsExpect || channelsActual == 3 && channelsExpect == 4))
{
Debug.LogWarningFormat("Tex channels not match: \"{0}\",{1}, expect: {2}", tex0.name, tex0.format, pngFormat);
}
if (tex0.isReadable)
{
return(tex0.EncodeToPNG());
}
else
{
Texture2D tex2D = new Texture2D(tex0.width, tex0.height);
try
{
Graphics.CopyTexture(tex0, tex2D);
return(tex2D.EncodeToPNG());
}
finally
{
Util.DestroyRes(tex2D);
}
}
}
else if (@this is RenderTexture)
{
Texture2D tex = ((RenderTexture)@this).ToNewTexture2D(pngFormat);
try
{
return(tex.EncodeToPNG());
}
finally
{
Util.DestroyRes(tex);
}
}
else
{
throw new NotSupportedException();
}
}
else
{
RenderTexture rt = null;
Material convertMat = null;
try
{
rt = RenderTexture.GetTemporary(@this.width, @this.height);
convertMat = new Material(Shader.Find("Hidden/ColorSpaceConvert"));
Graphics.Blit(@this, rt, convertMat, convert == TextureConvert.LinearToGamma ? 0 : 1);
return(rt.TextureEncodeToPNG(TextureConvert.None, pngFormat));
}
finally
{
RenderTexture.ReleaseTemporary(rt);
Util.DestroyRes(convertMat);
}
}
}