public static Bitmap ForEachPixel(this Bitmap bitmapToModify, Action<PixelColor> colorModifier)
{
bitmapToModify.SafeLockBits(ImageLockMode.ReadWrite, bitmapData =>
{
var bytesPerPixel = Image.GetPixelFormatSize(bitmapData.PixelFormat) / 8;
var stride = bitmapData.Stride;
unsafe
{
var ptrPixels = (byte*)(void*)bitmapData.Scan0;
var offset = stride - bitmapToModify.Width * bytesPerPixel;
var color1 = new PixelColor();
for (var y = 0; y < bitmapToModify.Height; y++)
{
for (var x = 0; x < bitmapToModify.Width; x++)
{
color1.FillTransportColor(ptrPixels)
.Modify(colorModifier)
.FillBitmapColor(ptrPixels);
ptrPixels += bytesPerPixel;
}
ptrPixels += offset;
}
}
});
return bitmapToModify;
}
public static Bitmap ModifyColorsUsingBitmap(this Bitmap bitmapToModify, Bitmap sourceBitmap, Func<PixelColor, PixelColor, PixelColor> colorsMergeFunc)
{
bitmapToModify.SafeLockBits(ImageLockMode.ReadWrite, bitmapData =>
{
sourceBitmap.SafeLockBits(ImageLockMode.ReadOnly, bitmapDataSrc =>
{
var bytesPerPixel = Image.GetPixelFormatSize(bitmapDataSrc.PixelFormat) / 8;
var stride = bitmapData.Stride;
unsafe
{
var ptrPixels = (byte*)(void*)bitmapData.Scan0;
var ptrPixelsSrc = (byte*)(void*)bitmapDataSrc.Scan0;
var offset = stride - bitmapToModify.Width * bytesPerPixel;
var color1 = new PixelColor();
var color2 = new PixelColor();
for (var y = 0; y < bitmapToModify.Height; y++)
{
for (var x = 0; x < bitmapToModify.Width; x++)
{
color1.FillTransportColor(ptrPixels);
color2.FillTransportColor(ptrPixelsSrc);
colorsMergeFunc(color1, color2).FillBitmapColor(ptrPixels);
ptrPixels += bytesPerPixel;
ptrPixelsSrc += bytesPerPixel;
}
ptrPixels += offset;
ptrPixelsSrc += offset;
}
}
});
});
return bitmapToModify;
}