private static IEnumerable <FileInfo> ExportJpgOptimized(FileInfo outputFile, UnityEngine.Texture2D texture, uint quality)
{
var outputFiles = new List <FileInfo>();
// Export color as temporary png
var tmpColorFile = new FileInfo(Path.ChangeExtension(GetTemporaryFilePath(outputFile), "png"));
var tmpColorTexture = Texture2DAsset.BlitTexture(texture, UnityEngine.TextureFormat.RGB24);
WritePng(tmpColorFile, tmpColorTexture);
// Export color as jpg
outputFiles.Add(ConvertPngToJpgOptimized(outputFile, tmpColorFile, quality));
// Export jpg alpha as png
if (Texture2DAsset.HasAlpha(texture))
{
// Bake alpha into color channels
var tmpAlphaFile = new FileInfo(Path.ChangeExtension(GetTemporaryFilePath(outputFile), "png"));
var tmpAlphaTexture = Texture2DAsset.BlitTexture(texture, UnityEngine.TextureFormat.RGBA32, alphaOnly: true);
// Export alpha as temporary png
WritePng(tmpAlphaFile, tmpAlphaTexture);
// Convert to 8-bit grayscale png
var outputAlphaFile = new FileInfo(Path.ChangeExtension(GetAlphaFilePath(outputFile), "png"));
outputFiles.Add(ConvertPngTo8BitGrayscale(outputAlphaFile, tmpAlphaFile));
}
return(outputFiles);
}
private static IEnumerable <FileInfo> ExportPng(FileInfo outputFile, UnityEngine.Texture2D texture)
{
var format = Texture2DAsset.HasAlpha(texture) ? UnityEngine.TextureFormat.RGBA32 : UnityEngine.TextureFormat.RGB24;
var outputTexture = Texture2DAsset.BlitTexture(texture, format);
return(WritePng(outputFile, outputTexture).AsEnumerable());
}
private static IEnumerable <FileInfo> ExportJpg(FileInfo outputFile, UnityEngine.Texture2D texture, uint quality)
{
var outputFiles = new List <FileInfo>();
// Export color as jpg
var outputColorTexture = Texture2DAsset.BlitTexture(texture, UnityEngine.TextureFormat.RGB24);
outputFiles.Add(WriteJpg(outputFile, outputColorTexture, quality));
// Export alpha as png
if (Texture2DAsset.HasAlpha(texture))
{
// Bake alpha into color channels, then kill alpha channel
var outputAlphaTexture = Texture2DAsset.BlitTexture(texture, UnityEngine.TextureFormat.RGBA32, alphaOnly: true);
outputAlphaTexture = Texture2DAsset.BlitTexture(outputAlphaTexture, UnityEngine.TextureFormat.RGB24);
// Export alpha as png
var outputAlphaFile = new FileInfo(Path.ChangeExtension(GetAlphaFilePath(outputFile), "png"));
outputFiles.Add(WritePng(outputAlphaFile, outputAlphaTexture));
}
return(outputFiles);
}
