public static Image CreateImage(int angle, double hueShift, double saturationAdjust, double lightnessAdjust, double contrast, double scaleX, double scaleY, string fileName)
{
TransformedBitmap transformBmp = new TransformedBitmap();
BitmapSource bitmapSource;
if (hueShift == 0 && saturationAdjust == 0 && lightnessAdjust == 0 && contrast == 0)
{
BitmapImage bmpImage = new BitmapImage();
bmpImage.BeginInit();
bmpImage.UriSource = new Uri(fileName, UriKind.RelativeOrAbsolute);
bmpImage.EndInit();
bitmapSource = bmpImage;
}
else
{
BitmapDecoder dec = BitmapDecoder.Create(new Uri(fileName), BitmapCreateOptions.None, BitmapCacheOption.Default);
BitmapFrame firstFrame = dec.Frames[0];
const int bytesPerPixel = 4;
byte[] pixels = new byte[firstFrame.PixelWidth * firstFrame.PixelHeight * bytesPerPixel];
firstFrame.CopyPixels(pixels, firstFrame.PixelWidth * bytesPerPixel, 0);
for (int i = 0; i < pixels.Length / 4; ++i)
{
int index = i * 4;
const int blueOffset = 0;
const int greenOffset = 1;
const int redOffset = 2;
const int alphaOffset = 3;
byte b = pixels[index + blueOffset];
byte g = pixels[index + greenOffset];
byte r = pixels[index + redOffset];
byte a = pixels[index + alphaOffset];
HueSatLight hueSatLight = new HueSatLight(Color.FromArgb(a, r, g, b));
if (hueShift != 0)
{
hueSatLight.HueShiftDegrees(hueShift);
}
if (saturationAdjust != 0)
{
hueSatLight.AdjustSaturation(saturationAdjust);
}
if (lightnessAdjust != 0)
{
hueSatLight.AdjustLightness(lightnessAdjust);
}
if (contrast != 0)
{
hueSatLight.AdjustContrast(contrast, (lightnessAdjust + 100) / 200);
}
Color shifted = hueSatLight.AsRGB;
pixels[index + blueOffset] = shifted.B;
pixels[index + greenOffset] = shifted.G;
pixels[index + redOffset] = shifted.R;
pixels[index + alphaOffset] = shifted.A;
}
// Write the modified pixels into a new bitmap and set that to the source
var writeableBitmap = new WriteableBitmap(firstFrame.PixelWidth, firstFrame.PixelHeight, firstFrame.DpiX, firstFrame.DpiY, PixelFormats.Pbgra32, null);
writeableBitmap.WritePixels(new Int32Rect(0, 0, firstFrame.PixelWidth, firstFrame.PixelHeight), pixels, firstFrame.PixelWidth * bytesPerPixel, 0);
bitmapSource = writeableBitmap;
}
transformBmp.BeginInit();
transformBmp.Source = bitmapSource;
RotateTransform rotation = new RotateTransform(angle);
ScaleTransform scaling = new ScaleTransform(scaleX, scaleY);
TransformGroup group = new TransformGroup();
group.Children.Add(scaling);
group.Children.Add(rotation);
transformBmp.Transform = group;
transformBmp.EndInit();
Image result = new Image();
result.Source = transformBmp;
return(result);
}
/// <summary>
/// Creates an Image with specified adjustments based on an image file on disk.
/// </summary>
/// <param name="angle">The angle to rotate the image. One of 0, 90, 180, or 270.</param>
/// <param name="hueShift">The degrees to rotate the hue.</param>
/// <param name="saturationAdjust">A value between -100 and 100. Negative values reduce saturation; positive values increase saturation.</param>
/// <param name="lightnessAdjust">A value between -100 and 100. Negative values darken the color; positive values lighten the color.</param>
/// <param name="contrast">A value between -100 and 100. Negative values reduce contrast (move more toward the threshold value); positive values increase the contrast (move away from the threshold value).</param>
/// <param name="scaleX">The horizontal scale of the image.</param>
/// <param name="scaleY">The vertical scale of the image.</param>
/// <param name="fileName">The image file to load.</param>
/// <returns></returns>
public static Image CreateImage(int angle, double hueShift, double saturationAdjust, double lightnessAdjust, double contrast, double scaleX, double scaleY, string fileName)
{
TransformedBitmap transformBmp = new TransformedBitmap();
BitmapSource bitmapSource;
if (hueShift == 0 && saturationAdjust == 0 && lightnessAdjust == 0 && contrast == 0)
{
BitmapImage bmpImage = new BitmapImage();
bmpImage.BeginInit();
bmpImage.UriSource = new Uri(fileName, UriKind.RelativeOrAbsolute);
bmpImage.EndInit();
bitmapSource = bmpImage;
}
else
{
BitmapDecoder dec = BitmapDecoder.Create(new Uri(fileName), BitmapCreateOptions.None, BitmapCacheOption.Default);
BitmapFrame firstFrame = dec.Frames[0];
const int bytesPerPixel = 4;
int stride = firstFrame.PixelWidth * bytesPerPixel;
byte[] pixels = new byte[stride * firstFrame.PixelHeight];
firstFrame.CopyPixels(pixels, stride, 0);
for (int i = 0; i < pixels.Length / 4; ++i)
{
int index = i * 4;
const int blueOffset = 0;
const int greenOffset = 1;
const int redOffset = 2;
const int alphaOffset = 3;
// Diagnostic pixel testing:
//int y = i / firstFrame.PixelWidth;
//int x = i - y * firstFrame.PixelWidth;
//if (x == 229 && y == 254)
//{
// System.Diagnostics.Debugger.Break();
//}
byte b = pixels[index + blueOffset];
byte g = pixels[index + greenOffset];
byte r = pixels[index + redOffset];
byte a = pixels[index + alphaOffset];
if (a == 0)
{
continue;
}
HueSatLight hueSatLight = new HueSatLight(Color.FromArgb(a, r, g, b));
if (hueShift != 0)
{
hueSatLight.HueShiftDegrees(hueShift);
}
if (saturationAdjust != 0)
{
hueSatLight.AdjustSaturation(saturationAdjust);
}
if (lightnessAdjust != 0)
{
hueSatLight.AdjustLightness(lightnessAdjust);
}
if (contrast != 0)
{
hueSatLight.AdjustContrast(contrast, (lightnessAdjust + 100) / 200);
}
Color shifted = hueSatLight.AsRGB;
pixels[index + blueOffset] = shifted.B;
pixels[index + greenOffset] = shifted.G;
pixels[index + redOffset] = shifted.R;
pixels[index + alphaOffset] = shifted.A;
}
bitmapSource = CreateBitmap(firstFrame, stride, pixels);
}
transformBmp.BeginInit();
transformBmp.Source = bitmapSource;
RotateTransform rotation = null;
if (angle != 0)
{
rotation = new RotateTransform(angle);
}
ScaleTransform scaling = null;
if (scaleX != 1 || scaleY != 1)
{
scaling = new ScaleTransform(scaleX, scaleY);
}
if (scaling != null || rotation != null)
{
TransformGroup group = new TransformGroup();
if (scaling != null)
{
group.Children.Add(scaling);
}
if (rotation != null)
{
group.Children.Add(rotation);
}
transformBmp.Transform = group;
}
transformBmp.EndInit();
Image result = new Image();
result.Source = transformBmp;
return(result);
}
