Replace SDL_Point and SDL_Rect with Gfx::Point and Gfx::Rect,

synchronization with trunk.

client/Gfx/Basic.cpp

@@ -0,0 +1,43 @@
+#include "StdInc.h"
+#include "Basic.h"
+
+namespace Gfx
+{
+
+void Rect::addOffs_copySize(const Rect & r)
+{
+	x += r.x;
+	y += r.y;
+	w = r.w;
+	h = r.h;
+}
+
+
+Rect Rect::operator&(const Rect &p) const //rect intersection
+{
+	bool intersect = true;
+
+	if (
+			leftX() > p.rightX() //rect p is on the left hand side of this
+		||	rightX() < p.leftX() //rect p is on the right hand side of this
+		||	topY() > p.bottomY() //rect p is above *this
+		||	bottomY() < p.topY() //rect p is below *this
+		)
+	{
+		return Rect();
+	}
+	else
+	{
+		Rect ret;
+		ret.x = std::max(this->x, p.x);
+		ret.y = std::max(this->y, p.y);
+		Point bR; //bottomRight point of returned rect
+		bR.x = std::min(this->w+this->x, p.w+p.x);
+		bR.y = std::min(this->h+this->y, p.h+p.y);
+		ret.w = bR.x - ret.x;
+		ret.h = bR.y - ret.y;
+		return ret;
+	}
+}
+
+}