diff --git a/lua.cpp b/lua.cpp
index cea7739..003f2e0 100644
--- a/lua.cpp
+++ b/lua.cpp
@@ -259,11 +259,15 @@ extern "C" {
     }
 
     static int cpp_clip(lua_State *L) {
-        int x = luaL_checknumber(L, 1);
-        int y = luaL_checknumber(L, 2);
-        int w = luaL_checknumber(L, 3);
-        int h = luaL_checknumber(L, 4);
-        clip(x, y, w, h);
+        if (lua_gettop(L) == 0) {
+            clip();
+        } else {
+            int x = luaL_checknumber(L, 1);
+            int y = luaL_checknumber(L, 2);
+            int w = luaL_checknumber(L, 3);
+            int h = luaL_checknumber(L, 4);
+            clip(x, y, w, h);
+        }
         return 0;
     }
 
diff --git a/mini.cpp b/mini.cpp
index 3e89a11..6aa0ff8 100644
--- a/mini.cpp
+++ b/mini.cpp
@@ -362,8 +362,19 @@ int main(int argc,char*argv[]){
     return 0;
 }
 
+void simple_pset(int x, int y, uint8_t color) {
+    x -= ds::cam[0]; y -= ds::cam[1];
+    if (x < ds::clip[0] || x >= ds::clip[2] || y < ds::clip[1] || y >= ds::clip[3]) return;
+    DEST(x, y) = color;
+}
+
 void cls(uint8_t color) {
-    SDL_memset(dest_surface->p, color, dest_surface->size);
+    for (int y=ds::clip[1]; y<ds::clip[3];++y) {
+        for (int x=ds::clip[0]; x<ds::clip[2];++x) {
+            simple_pset(x,y,color);
+        }
+    }
+    //SDL_memset(dest_surface->p, color, dest_surface->size);
 }
 
 void color(uint8_t color) {
@@ -440,15 +451,9 @@ void palt(uint8_t col, bool t) {
 }
 */
 
-void simple_pset(int x, int y, uint8_t color) {
-    x -= ds::cam[0]; y -= ds::cam[1];
-    if (x < ds::clp[0] || x > ds::clp[2] || y < ds::clp[1] || y > ds::clp[3]) return;
-    DEST(x, y) = color;
-}
-
 void pset(int x, int y) {
     x -= ds::cam[0]; y -= ds::cam[1];
-    if (x < ds::clp[0] || x > ds::clp[2] || y < ds::clp[1] || y > ds::clp[3]) return;
+    if (x < ds::clip[0] || x >= ds::clip[2] || y < ds::clip[1] || y >= ds::clip[3]) return;
     if (ds::trans != ds::pen_color) DEST(x, y) = ds::pen_color;
 }
 
@@ -471,7 +476,8 @@ void pset(int x, int y, uint8_t color) {
 
 uint8_t pget(int x, int y) {
     x -= ds::cam[0]; y -= ds::cam[1];
-    if (x < 0 || x > (dest_surface->w-1) || y < 0 || y > (dest_surface->h-1)) return 0;
+    //if (x < 0 || x > (dest_surface->w-1) || y < 0 || y > (dest_surface->h-1)) return 0;
+    if (x < ds::clip[0] || x >= ds::clip[2] || y < ds::clip[1] || y >= ds::clip[3]) return 0;
     return DEST(x, y);
 }
 
@@ -627,6 +633,11 @@ void clip(int x, int y, int w, int h) {
     ds::clp[0] = x; ds::clp[1] = y; ds::clp[2] = w-x-1; ds::clp[3] = h-y-1;
 }
 
+void clip() {
+    ds::clip[0] = ds::clip[1] = 0; ds::clip[2] = screen_width; ds::clip[3] = screen_height;
+    ds::clp[0] = ds::clp[1] = 0; ds::clp[2] = screen_width-1; ds::clp[3] = screen_height-1;
+}
+
 void camera(int x, int y) {
     ds::cam[0] = x;
     ds::cam[1] = y;
diff --git a/mini.h b/mini.h
index 95dc7cb..dc0ee37 100644
--- a/mini.h
+++ b/mini.h
@@ -166,6 +166,7 @@ void print(const char *str, int x, int y);
 void print(const char *str, int x, int y, uint8_t color);
 
 void clip(int x, int y, int w, int h);
+void clip();
 void camera(int x, int y);
 
 void circ(int x, int y, uint8_t r = 4);