public static Bitmap CombineChannels(Bitmap r, Bitmap g, Bitmap b, Bitmap a)
{
int width = Helpers.Max(r.Width, g.Width, b.Width, a.Width);
int height = Helpers.Max(r.Height, g.Height, b.Height, a.Height);
var merged = new Bitmap(width, height, PixelFormat.Format32bppArgb);
PopupTextWindow popupText = new PopupTextWindow
{
PopupText = { Text = "Creating Texture, Please Wait" }
};
popupText.Show();
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
int rIntensity = r.GetPixel(x % r.Width, y % r.Height).R;
int gIntensity = g.GetPixel(x % g.Width, y % g.Height).G;
int bIntensity = b.GetPixel(x % b.Width, y % b.Height).B;
// This uses the generated previews, so the alpha preview has 255 alpha throughout. However, any other channel has the alpha value.
int aIntensity = a.GetPixel(x % a.Width, y % a.Height).R;
merged.SetPixel(x, y, Color.FromArgb(aIntensity, rIntensity, gIntensity, bIntensity));
}
}
popupText.Close();
return(merged);
}
public static Bitmap ExtractChannel(string imagePath, EChannel channelToExtract, EChannel finalChannel, bool invert, string popupTextExtra = "")
{
if (!ImageUtility.Validation.IsValidImage(imagePath))
{
return(new Bitmap(1, 1));
}
var bitmap = new Bitmap(imagePath);
var extractedBitmap = new Bitmap(bitmap.Width, bitmap.Height, PixelFormat.Format32bppArgb);
PopupTextWindow.OpenWindowAndExecute($"Generating Texture By Extracting Channel, Please Wait {popupTextExtra}",
() =>
{
for (int y = 0; y < bitmap.Height; y++)
{
for (int x = 0; x < bitmap.Width; x++)
{
Color pixelColor = bitmap.GetPixel(x, y);
int intensity;
switch (channelToExtract)
{
case EChannel.R:
intensity = pixelColor.R;
break;
case EChannel.G:
intensity = pixelColor.G;
break;
case EChannel.B:
intensity = pixelColor.B;
break;
case EChannel.A:
intensity = ImageUtility.Validation.ImageHasTransparency(imagePath) ? pixelColor.A : 255;
break;
default:
throw new ArgumentOutOfRangeException(nameof(channelToExtract), channelToExtract, null);
}
if (intensity > 0 & intensity <= 255)
{
if (invert)
{
intensity = 255 - intensity;
}
switch (finalChannel)
{
case EChannel.R:
extractedBitmap.SetPixel(x, y, Color.FromArgb(255, intensity, 0, 0));
break;
case EChannel.G:
extractedBitmap.SetPixel(x, y, Color.FromArgb(255, 0, intensity, 0));
break;
case EChannel.B:
extractedBitmap.SetPixel(x, y, Color.FromArgb(255, 0, 0, intensity));
break;
case EChannel.A:
extractedBitmap.SetPixel(x, y, Color.FromArgb(255, intensity, intensity, intensity));
break;
default:
throw new ArgumentOutOfRangeException(nameof(finalChannel), finalChannel, null);
}
}
else
{
extractedBitmap.SetPixel(x, y, Color.FromArgb(0, 0, 0, 0));
}
}
}
});
bitmap.Dispose();
return(extractedBitmap);
}
