Function PixelSearch

source/script2.cpp:3414–3641

void PixelSearch(Var *output_var_x, Var *output_var_y
	, int aLeft, int aTop, int aRight, int aBottom, COLORREF aColorRGB
	, int aVariation, bool aIsPixelGetColor, ResultToken &aResultToken)
// Author: The fast-mode PixelSearch was created by Aurelian Maga.
{
	// For maintainability, get RGB/BGR conversion out of the way early.
	COLORREF aColorBGR = rgb_to_bgr(aColorRGB);

	// Many of the following sections are similar to those in ImageSearch(), so they should be
	// maintained together.

	if (!aIsPixelGetColor)
	{
		output_var_x->Assign();  // Init to empty string regardless of whether we succeed here.
		output_var_y->Assign();  // Same.
	}

	POINT origin = {0};
	CoordToScreen(origin, COORD_MODE_PIXEL);
	aLeft   += origin.x;
	aTop    += origin.y;
	aRight  += origin.x;
	aBottom += origin.y;

	bool right_to_left = aLeft > aRight;
	bool bottom_to_top = aTop > aBottom;

	int left = aLeft;
	int top = aTop;
	int right = aRight;
	int bottom = aBottom;
	if (right_to_left)
	{
		left = aRight;
		right = aLeft;
	}
	if (bottom_to_top)
	{
		top = aBottom;
		bottom = aTop;
	}

	if (aVariation < 0)
		aVariation = 0;
	if (aVariation > 255)
		aVariation = 255;

	// Allow colors to vary within the spectrum of intensity, rather than having them
	// wrap around (which doesn't seem to make much sense).  For example, if the user specified
	// a variation of 5, but the red component of aColorBGR is only 0x01, we don't want red_low to go
	// below zero, which would cause it to wrap around to a very intense red color:
	COLORREF pixel; // Used much further down.
	BYTE red, green, blue; // Used much further down.
	BYTE search_red, search_green, search_blue;
	BYTE red_low, green_low, blue_low, red_high, green_high, blue_high;
	if (aVariation > 0)
	{
		search_red = GetRValue(aColorBGR);