Remove compatibility to image class

All the APIs that accept both an image and a cairo surface now only accept cairo
surfaces. Images are gone.

Signed-off-by: Uli Schlachter <psychon@znc.in>

objects/client.c

@@ -1100,10 +1100,10 @@ client_set_icon(lua_State *L, int cidx, int iidx)
             cairo_surface_destroy(c->icon);
         c->icon = NULL;
     } else {
-        cairo_surface_t *surface = luaA_image_to_surface(L, iidx);
+        cairo_surface_t **cairo_surface = (cairo_surface_t **)luaL_checkudata(L, iidx, OOCAIRO_MT_NAME_SURFACE);
         if(c->icon)
             cairo_surface_destroy(c->icon);
-        c->icon = surface;
+        c->icon = draw_dup_image_surface(*cairo_surface);
     }
     luaA_object_emit_signal(L, cidx < iidx ? cidx : cidx - 1, "property::icon", 0);
 }

objects/image.c

@@ -784,55 +784,6 @@ luaA_image_get_alpha(lua_State *L, image_t *image)
     return 1;
 }
 
-/** Convert an image into a cairo image surface.
- * \param image The image to convert.
- * \returns A cairo surface with the same content. This surface must be
- * destroyed by the caller!
- */
-cairo_surface_t *
-image_to_surface(image_t *image)
-{
-    cairo_surface_t *ret;
-    cairo_surface_t *surface = cairo_image_surface_create_for_data(
-            image_getdata(image), CAIRO_FORMAT_ARGB32,
-            image_getwidth(image), image_getheight(image),
-            image_getwidth(image) * 4);
-    /* Cairo doesn't copy the data we give to it so we have to make a
-     * copy of the data. This is the lazy way to do that. */
-    ret = draw_dup_image_surface(surface);
-    cairo_surface_destroy(surface);
-    return ret;
-}
-
-/** Convert an image into a cairo image surface.
- * \param L The Lua VM state.
- * \param idx The index of the image in the lua stack
- * \returns A cairo surface with the same content as the image. This surface
- * must be destroyed by the caller!
- */
-cairo_surface_t *
-luaA_image_to_surface(lua_State *L, int idx)
-{
-    bool is_surface = false;
-    /* This inlines luaL_checkudata() but skips luaL_typerror() */
-    if(lua_getmetatable(L, idx))
-    {
-        lua_getfield(L, LUA_REGISTRYINDEX, OOCAIRO_MT_NAME_SURFACE);
-        if(lua_rawequal(L, -1, -2))
-            is_surface = true;
-        lua_pop(L, 2);
-    }
-    if(is_surface)
-    {
-        cairo_surface_t **cairo_surface = (cairo_surface_t **)luaL_checkudata(L, idx, OOCAIRO_MT_NAME_SURFACE);
-        return draw_dup_image_surface(*cairo_surface);
-    }
-
-    luaA_checkudata(L, idx, &image_class);
-    image_t *image = (void *) lua_topointer(L, idx);
-    return image_to_surface(image);
-}
-
 void
 image_class_setup(lua_State *L)
 {

objects/image.h

@@ -32,8 +32,6 @@ int image_new_from_argb32(lua_State *L, int, int, uint32_t *);
 uint8_t * image_getdata(image_t *);
 int image_getwidth(image_t *);
 int image_getheight(image_t *);
-cairo_surface_t *image_to_surface(image_t *);
-cairo_surface_t *luaA_image_to_surface(lua_State *, int idx);
 
 xcb_pixmap_t image_to_1bit_pixmap(image_t *, xcb_drawable_t);
 

objects/wibox.c

@@ -946,10 +946,10 @@ luaA_wibox_set_bg_image(lua_State *L, wibox_t *wibox)
             cairo_surface_destroy(wibox->bg_image);
         wibox->bg_image = NULL;
     } else {
-        cairo_surface_t *surface = luaA_image_to_surface(L, -1);
+        cairo_surface_t **cairo_surface = (cairo_surface_t **)luaL_checkudata(L, -1, OOCAIRO_MT_NAME_SURFACE);
         if(wibox->bg_image)
             cairo_surface_destroy(wibox->bg_image);
-        wibox->bg_image = surface;
+        wibox->bg_image = draw_dup_image_surface(*cairo_surface);
     }
     wibox->need_update = true;
     luaA_object_emit_signal(L, -3, "property::bg_image", 0);

objects/widgets/imagebox.c

@@ -95,11 +95,10 @@ imagebox_set_image(lua_State *L, widget_t *widget, int idx)
             cairo_surface_destroy(d->image);
         d->image = NULL;
     } else {
-        cairo_surface_t *new_surface = luaA_image_to_surface(L, idx);
+        cairo_surface_t **cairo_surface = (cairo_surface_t **)luaL_checkudata(L, idx, OOCAIRO_MT_NAME_SURFACE);
-
         if(d->image)
             cairo_surface_destroy(d->image);
-        d->image = new_surface;
+        d->image = draw_dup_image_surface(*cairo_surface);
     }
 
     widget_invalidate_bywidget(widget);

objects/widgets/textbox.c

@@ -345,9 +345,9 @@ luaA_textbox_newindex(lua_State *L, const char *prop)
             cairo_surface_destroy(d->bg_image);
             d->bg_image = NULL;
         } else {
-            cairo_surface_t *surface = luaA_image_to_surface(L, -1);
+            cairo_surface_t **cairo_surface = (cairo_surface_t **)luaL_checkudata(L, -1, OOCAIRO_MT_NAME_SURFACE);
             cairo_surface_destroy(d->bg_image);
-            d->bg_image = surface;
+            d->bg_image = draw_dup_image_surface(*cairo_surface);
         }
     }
     else if(a_strcmp(prop, "bg") == 0)