private void SaveHelper(TextureFormat format, byte[] rawBytes, int texwidth, int texheight, bool convertTo16,
ChannelsPerMap exportChannels, string imagePath, FREE_IMAGE_FORMAT destFormat, FREE_IMAGE_SAVE_FLAGS saveFlags)
{
int bytesPerPixel = 4;
FREE_IMAGE_TYPE imageType = FREE_IMAGE_TYPE.FIT_BITMAP;
switch (format)
{
case TextureFormat.RGBAHalf:
imageType = FREE_IMAGE_TYPE.FIT_RGBA16;
bytesPerPixel = 8;
break;
case TextureFormat.RGBAFloat:
imageType = FREE_IMAGE_TYPE.FIT_RGBAF;
bytesPerPixel = 16;
break;
case TextureFormat.ARGB32:
imageType = FREE_IMAGE_TYPE.FIT_BITMAP;
bytesPerPixel = 4;
//tex.GetPixels32();
//ConvertBGRAtoARGBScanline(dib);
// convert back to ARGB
if (FreeImage.IsLittleEndian())
{
for (int j = 0; j < rawBytes.Length; j += 4)
{
// convert BGRA to ARGB
var a = rawBytes[j];
var r = rawBytes[j + 1];
rawBytes[j] = rawBytes[j + 3];
rawBytes[j + 1] = rawBytes[j + 2];
rawBytes[j + 2] = r;
rawBytes[j + 3] = a;
}
}
break;
case TextureFormat.RGB24:
imageType = FREE_IMAGE_TYPE.FIT_BITMAP;
bytesPerPixel = 3;
if (FreeImage.IsLittleEndian())
{
// convert back to RGB
for (int i = 0; i < rawBytes.Length; i += 3)
{
// convert BGR to RGB
var r = rawBytes[i];
rawBytes[i] = rawBytes[i + 2];
rawBytes[i + 2] = r;
}
}
break;
}
FIBITMAP dib = FreeImage.ConvertFromRawBits(rawBytes, imageType, texwidth, texheight, texwidth * bytesPerPixel, (uint)bytesPerPixel * 8, 0, 0, 0, false);
if (dib.IsNull)
{
Debug.LogError("Dib is NULL!!!");
}
rawBytes = null;
GC.Collect();
if (convertTo16)
{
dib = FreeImage.ConvertToType(dib, FREE_IMAGE_TYPE.FIT_RGBA16, false);
format = TextureFormat.RGBAHalf;
}
switch (exportChannels)
{
case ChannelsPerMap.RGB:
// remove alpha channel
switch (format)
{
case TextureFormat.RGBAFloat:
dib = FreeImage.ConvertToRGBF(dib);
break;
case TextureFormat.RGBAHalf:
dib = FreeImage.ConvertToType(dib, FREE_IMAGE_TYPE.FIT_RGB16, false);
break;
case TextureFormat.ARGB32:
dib = FreeImage.ConvertTo24Bits(dib);
break;
}
break;
case ChannelsPerMap.R:
dib = FreeImage.GetChannel(dib, FREE_IMAGE_COLOR_CHANNEL.FICC_RED);
break;
// if already RGBA don't need to do any conversion
default:
break;
}
try
{
using (FileStream saveStream = new FileStream(imagePath, FileMode.OpenOrCreate, FileAccess.Write))
{
Debug.Log("FreeImage::FileSaveSuccess: " + imagePath + " :" + FreeImage.SaveToStream(ref dib, saveStream, destFormat, saveFlags, true));
}
}
catch (Exception e)
{
Debug.LogException(e);
//progressBar.DoneProgress();
FreeImage.UnloadEx(ref dib);
throw;
}
//if (progressBar != null)
//{
// UnityThreadHelper.Dispatcher.Dispatch(() =>
// {
// progressBar.Increment();
// });
//}
}