Add framebuffer filter modes (issue #112)

src/modules/graphics/opengl/wrap_Framebuffer.cpp

@@ -41,9 +41,43 @@ namespace opengl
 		return 1;
 	}
 
+	int w_Framebuffer_setFilter(lua_State * L)
+	{
+		Framebuffer * fbo = luax_checkfbo(L, 1);
+		const char * minstr = luaL_checkstring(L, 2);
+		const char * magstr = luaL_checkstring(L, 3);
+
+		Image::Filter f;
+		if (!Image::getConstant(minstr, f.min))
+			return luaL_error(L, "Invalid min filter mode: %s", minstr);
+		if (!Image::getConstant(magstr, f.mag))
+			return luaL_error(L, "Invalid max filter mode: %s", minstr);
+
+		fbo->setFilter(f);
+		return 0;
+	}
+
+	int w_Framebuffer_getFilter(lua_State * L)
+	{
+		Framebuffer * fbo = luax_checkfbo(L, 1);
+		Image::Filter f = fbo->getFilter();
+
+		const char * minstr;
+		const char * magstr;
+		Image::getConstant(f.min, minstr);
+		Image::getConstant(f.mag, magstr);
+
+		lua_pushstring(L, minstr);
+		lua_pushstring(L, magstr);
+
+		return 2;
+	}
+
 	static const luaL_Reg functions[] = {
 		{ "renderTo", w_Framebuffer_renderTo },
 		{ "getImageData", w_Framebuffer_getImageData },
+		{ "setFilter", w_Framebuffer_setFilter },
+		{ "getFilter", w_Framebuffer_getFilter },
 		{ 0, 0 }
 	};