Method blitNShade

src/Engine/Surface.cpp:805–823

* Specific blit function to blit battlescape terrain data in different shades in a fast way. * Notice there is no surface locking here - you have to make sure you lock the surface yourself * at the start of blitting and unlock it when done. * @param surface to blit to * @param x * @param y * @param off * @param half some tiles are blitted only the right half * @param newBaseColor Attention

 * @param newBaseColor Attention: the actual color + 1, because 0 is no new base color.
 */
void Surface::blitNShade(Surface *surface, int x, int y, int off, bool half, int newBaseColor)
{
	ShaderMove<Uint8> src(this, x, y);
	if(half)
	{
		GraphSubset g = src.getDomain();
		g.beg_x = g.end_x/2;
		src.setDomain(g);
	}
	if(newBaseColor)
	{
		--newBaseColor;
		newBaseColor <<= 4;
		ShaderDraw<ColorReplace>(ShaderSurface(surface), src, ShaderScalar(off), ShaderScalar(newBaseColor));
	}
	else
		ShaderDraw<StandartShade>(ShaderSurface(surface), src, ShaderScalar(off));

}

/**
 * Set the surface to be redrawn