diff --git a/caca/driver/slang.c b/caca/driver/slang.c
index 60e300b..99aa332 100644
--- a/caca/driver/slang.c
+++ b/caca/driver/slang.c
@@ -220,20 +220,24 @@ static int slang_get_display_height(caca_display_t const *dp)
 
 static void slang_display(caca_display_t *dp)
 {
-    uint32_t const *cvchars = (uint32_t const *)caca_get_canvas_chars(dp->cv);
-    uint32_t const *cvattrs = (uint32_t const *)caca_get_canvas_attrs(dp->cv);
     int x, y, i;
 
     for(i = 0; i < caca_get_dirty_rectangle_count(dp->cv); i++)
     {
+        uint32_t const *cvchars, *cvattrs;
         int xmin, ymin, xmax, ymax;
 
         caca_get_dirty_rectangle(dp->cv, i, &xmin, &ymin, &xmax, &ymax);
 
+        cvchars = (uint32_t const *)caca_get_canvas_chars(dp->cv)
+                    + xmin + ymin * dp->cv->width;
+        cvattrs = (uint32_t const *)caca_get_canvas_attrs(dp->cv)
+                    + xmin + ymin * dp->cv->width;
+
         for(y = ymin; y <= ymax; y++)
         {
-            SLsmg_gotorc(y, 0);
-            for(x = xmax; x >= xmin; x--)
+            SLsmg_gotorc(y, xmin);
+            for(x = xmin; x <= xmax; x++)
             {
                 uint32_t ch = *cvchars++;
 
@@ -277,6 +281,9 @@ static void slang_display(caca_display_t *dp)
                 slang_write_utf32(ch);
 #endif
             }
+
+            cvchars += dp->cv->width - (xmax - xmin) - 1;
+            cvattrs += dp->cv->width - (xmax - xmin) - 1;
         }
     }
     SLsmg_gotorc(caca_get_cursor_y(dp->cv), caca_get_cursor_x(dp->cv));
diff --git a/caca/driver/x11.c b/caca/driver/x11.c
index 9450d1f..5528f25 100644
--- a/caca/driver/x11.c
+++ b/caca/driver/x11.c
@@ -142,7 +142,7 @@ static int x11_init_graphics(caca_display_t *dp)
         else
             dp->drv.p->max_char = 0x7f;
 
-        font_max_char = 
+        font_max_char =
             (dp->drv.p->font_struct->max_byte1 << 8)
              | dp->drv.p->font_struct->max_char_or_byte2;
         if(font_max_char && (font_max_char < dp->drv.p->max_char))
@@ -153,7 +153,7 @@ static int x11_init_graphics(caca_display_t *dp)
 
     /* Reset the default X11 error handler */
     XSetErrorHandler(old_error_handler);
-    
+
     dp->drv.p->font_width = 0;
     if(dp->drv.p->font_struct->per_char
         && !dp->drv.p->font_struct->min_byte1
@@ -331,8 +331,8 @@ static void x11_display(caca_display_t *dp)
         {
             int yoff = (y + 1) * dp->drv.p->font_height
                                         - dp->drv.p->font_offset;
-            uint32_t const *chars = cvchars + y * width;
-            uint32_t const *attrs = cvattrs + y * width;
+            uint32_t const *chars = cvchars + xmin + y * width;
+            uint32_t const *attrs = cvattrs + xmin + y * width;
 
             for(x = xmin; x <= xmax; x++, chars++, attrs++)
             {