love.graphics.getScissor now has a proper C++ module method

src/modules/graphics/opengl/Graphics.cpp

@@ -273,19 +273,16 @@ void Graphics::setScissor()
 	glDisable(GL_SCISSOR_TEST);
 }
 
-int Graphics::getScissor(lua_State *L) const
+bool Graphics::getScissor(int &x, int &y, int &width, int &height) const
 {
-	if (glIsEnabled(GL_SCISSOR_TEST) == GL_FALSE)
-		return 0;
-
 	OpenGL::Viewport scissor = gl.getScissor();
 
-	lua_pushinteger(L, scissor.x);
-	lua_pushinteger(L, scissor.y);
-	lua_pushinteger(L, scissor.w);
-	lua_pushinteger(L, scissor.h);
+	x = scissor.x;
+	y = scissor.y;
+	width = scissor.w;
+	height = scissor.h;
 
-	return 4;
+	return glIsEnabled(GL_SCISSOR_TEST) == GL_TRUE;
 }
 
 void Graphics::defineStencil()

src/modules/graphics/opengl/Graphics.h

@@ -163,10 +163,10 @@ public:
 	void setScissor();
 
 	/**
-	 * This native Lua function gets the current scissor box in the order of:
-	 * x, y, width, height
-	 **/
-	int getScissor(lua_State *L) const;
+	 * Gets the current scissor box.
+	 * @return Whether the scissor is enabled.
+	 */
+	bool getScissor(int &x, int &y, int &width, int &height) const;
 
 	/**
 	 * Enables the stencil buffer and set stencil function to fill it

src/modules/graphics/opengl/wrap_Graphics.cpp

@@ -104,7 +104,16 @@ int w_setScissor(lua_State *L)
 
 int w_getScissor(lua_State *L)
 {
-	return instance->getScissor(L);
+	int x, y, w, h;
+	if (!instance->getScissor(x, y, w, h))
+		return 0;
+
+	lua_pushinteger(L, x);
+	lua_pushinteger(L, y);
+	lua_pushinteger(L, w);
+	lua_pushinteger(L, h);
+
+	return 4;
 }
 
 static int setStencil(lua_State *L, bool invert)