public static void Blit(LockedBitmap source, LockedBitmap target, System.Drawing.Rectangle srcRect, int destX, int destY)
{
for (int sx = srcRect.X, dx = destX; sx < srcRect.X + srcRect.Width; sx++, dx++)
{
for (int sy = srcRect.Y, dy = destY; sy < srcRect.Y + srcRect.Height; sy++, dy++)
{
Color sourcePixel = source.GetPixel(sx, sy);
target.SetPixel(dx, dy, sourcePixel);
}
}
}
public static void BlitMask(LockedBitmap source, LockedBitmap target, System.Drawing.Rectangle srcRect, int destX, int destY)
{
if (source.Depth != 24 || target.Depth != 32)
{
throw new Exception("BlitMask requires the source to be 24-bit and the target to be 32-bit");
}
int targetStartX = Math.Max(destX, 0);
int targetEndX = Math.Min(destX + srcRect.Width, target.Width);
int targetStartY = Math.Max(destY, 0);
int targetEndY = Math.Min(destY + srcRect.Height, target.Height);
int copyW = targetEndX - targetStartX;
int copyH = targetEndY - targetStartY;
if (copyW < 0 || copyH < 0)
{
return;
}
int sourceStartX = srcRect.X + targetStartX - destX;
int sourceStartY = srcRect.Y + targetStartY - destY;
for (int sx = sourceStartX, dx = targetStartX; dx < targetEndX; sx++, dx++)
{
for (int sy = sourceStartY, dy = targetStartY; dy < targetEndY; sy++, dy++)
{
Color sourcePixel = source.GetPixel(sx, sy);
int lume = sourcePixel.R + sourcePixel.G + sourcePixel.B;
lume /= 3;
if (lume > 255)
{
lume = 255;
}
target.SetComponent(dx, dy, 3, (byte)lume);
}
}
}
/// <summary>
/// Returns true when the pixel specified is black.
/// </summary>
public static bool EmptyPixelAt(LockedBitmap lockedBitmap, int x, int y)
{
Color color = lockedBitmap.GetPixel(x, y);
return(color.R == 0 && color.G == 0 && color.B == 0);
}