public override Bitmap Perform(Bitmap bitmap)
{
int bytesPerPixel;
if (bitmap.PixelFormat == PixelFormat.Format24bppRgb)
{
bytesPerPixel = 3;
}
else if (bitmap.PixelFormat == PixelFormat.Format32bppArgb)
{
bytesPerPixel = 4;
}
else
{
// No need to handle 1bpp since hue shifts are null transforms
return(bitmap);
}
float hueShiftAdjusted = HueShift / 2000f * 360;
if (hueShiftAdjusted < 0)
{
hueShiftAdjusted += 360;
}
UnsafeImageOps.HueShift(bitmap, bytesPerPixel, hueShiftAdjusted);
return(bitmap);
}
public override Bitmap Perform(Bitmap bitmap)
{
var brightnessAdjusted = Brightness / 1000f;
EnsurePixelFormat(ref bitmap);
UnsafeImageOps.ChangeBrightness(bitmap, brightnessAdjusted);
return(bitmap);
}
public override Bitmap Perform(Bitmap bitmap)
{
EnsurePixelFormat(ref bitmap);
UnsafeImageOps.StretchHistogram(bitmap,
(byte)Parameters.RedMin, (byte)Parameters.RedMax,
(byte)Parameters.GreenMin, (byte)Parameters.GreenMax,
(byte)Parameters.BlueMin, (byte)Parameters.BlueMax);
return(bitmap);
}
public override Bitmap Perform(Bitmap bitmap)
{
// convert +/-1000 input range to a logarithmic scaled multiplier
var contrastAdjusted = (float)Math.Pow(2.718281f, Contrast / 500.0f);
// see http://docs.rainmeter.net/tips/colormatrix-guide/ for offset & matrix calculation
var offset = (1.0f - contrastAdjusted) / 2.0f;
EnsurePixelFormat(ref bitmap);
UnsafeImageOps.ChangeContrast(bitmap, contrastAdjusted, offset);
return(bitmap);
}
public override Bitmap Perform(Bitmap bitmap)
{
if (bitmap.PixelFormat != PixelFormat.Format24bppRgb && bitmap.PixelFormat != PixelFormat.Format32bppArgb)
{
return(bitmap);
}
var monoBitmap = UnsafeImageOps.ConvertTo1Bpp(bitmap, Threshold);
bitmap.Dispose();
return(monoBitmap);
}
public override Bitmap Perform(Bitmap bitmap)
{
if (bitmap.PixelFormat != PixelFormat.Format24bppRgb && bitmap.PixelFormat != PixelFormat.Format32bppArgb)
{
return(bitmap);
}
var grayscaleBitmap = UnsafeImageOps.ConvertToGrayscale(bitmap, RedWeighting, GreenWeighting, BlueWeighting);
bitmap.Dispose();
return(grayscaleBitmap);
}
public override Bitmap Perform(Bitmap bitmap)
{
if (bitmap.PixelFormat != PixelFormat.Format24bppRgb && bitmap.PixelFormat != PixelFormat.Format32bppArgb)
{
// No need to handle 1bpp since hue shifts are null transforms
return(bitmap);
}
var hueShiftAdjusted = HueShift / 2000f * 360;
if (hueShiftAdjusted < 0)
{
hueShiftAdjusted += 360;
}
UnsafeImageOps.HueShift(bitmap, hueShiftAdjusted);
return(bitmap);
}
public override Bitmap Perform(Bitmap bitmap)
{
double xScale = bitmap.Width / (double)(OriginalWidth ?? bitmap.Width),
yScale = bitmap.Height / (double)(OriginalHeight ?? bitmap.Height);
int x = ((int)Math.Round(Left * xScale)).Clamp(0, bitmap.Width - 1);
int y = ((int)Math.Round(Top * yScale)).Clamp(0, bitmap.Height - 1);
int width = (bitmap.Width - (int)Math.Round((Left + Right) * xScale)).Clamp(1, bitmap.Width - x);
int height = (bitmap.Height - (int)Math.Round((Top + Bottom) * yScale)).Clamp(1, bitmap.Height - y);
var result = new Bitmap(width, height, bitmap.PixelFormat);
result.SafeSetResolution(bitmap.HorizontalResolution, bitmap.VerticalResolution);
if (bitmap.PixelFormat == PixelFormat.Format1bppIndexed)
{
result.Palette.Entries[0] = bitmap.Palette.Entries[0];
result.Palette.Entries[1] = bitmap.Palette.Entries[1];
}
UnsafeImageOps.RowWiseCopy(bitmap, result, x, y, width, height);
bitmap.Dispose();
return(result);
}
