forked from AuroraMiddleware/gtk
GtkIconTheme: Add helpers to load to cairo_surface_t
Right now this just uses the pixbuf load code and converts it to a surface. In the future we could cache the pattern to allow reusing the surface.
This commit is contained in:
Alexander Larsson
parent
58adb70d43
commit
1d0bb3e010
@ -2080,6 +2080,69 @@ gtk_icon_theme_load_icon_for_scale (GtkIconTheme *icon_theme,
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return pixbuf;
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}
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/**
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* gtk_icon_theme_load_surface:
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* @icon_theme: a #GtkIconTheme
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* @icon_name: the name of the icon to lookup
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* @size: the desired icon size. The resulting icon may not be
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* exactly this size; see gtk_icon_info_load_icon().
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* @scale: desired scale
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* @for_window: (allow-none): #GdkWindow to optimize drawing for, or %NULL
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* @flags: flags modifying the behavior of the icon lookup
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* @error: (allow-none): Location to store error information on failure,
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* or %NULL.
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*
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* Looks up an icon in an icon theme for a particular window scale,
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* scales it to the given size and renders it into a cairo surface. This is a
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* convenience function; if more details about the icon are needed,
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* use gtk_icon_theme_lookup_icon() followed by
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* gtk_icon_info_load_surface().
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*
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* Note that you probably want to listen for icon theme changes and
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* update the icon. This is usually done by connecting to the
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* GtkWidget::style-set signal.
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*
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* Return value: (transfer full): the rendered icon; this may be a
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* newly created icon or a new reference to an internal icon, so
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* you must not modify the icon. Use cairo_surface_destroy() to release
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* your reference to the icon. %NULL if the icon isn't found.
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*
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* Since: 3.10
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**/
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cairo_surface_t *
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gtk_icon_theme_load_surface (GtkIconTheme *icon_theme,
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const gchar *icon_name,
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gint size,
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gint scale,
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GdkWindow *for_window,
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GtkIconLookupFlags flags,
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GError **error)
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{
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GtkIconInfo *icon_info;
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cairo_surface_t *surface = NULL;
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g_return_val_if_fail (GTK_IS_ICON_THEME (icon_theme), NULL);
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g_return_val_if_fail (icon_name != NULL, NULL);
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g_return_val_if_fail ((flags & GTK_ICON_LOOKUP_NO_SVG) == 0 ||
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(flags & GTK_ICON_LOOKUP_FORCE_SVG) == 0, NULL);
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g_return_val_if_fail (error == NULL || *error == NULL, NULL);
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g_return_val_if_fail (scale >= 1, NULL);
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icon_info = gtk_icon_theme_lookup_icon_for_scale (icon_theme, icon_name, size, scale,
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flags | GTK_ICON_LOOKUP_USE_BUILTIN);
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if (!icon_info)
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{
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g_set_error (error, GTK_ICON_THEME_ERROR, GTK_ICON_THEME_NOT_FOUND,
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_("Icon '%s' not present in theme"), icon_name);
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return NULL;
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}
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surface = gtk_icon_info_load_surface (icon_info, for_window, error);
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g_object_unref (icon_info);
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return surface;
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}
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/**
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* gtk_icon_theme_has_icon:
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* @icon_theme: a #GtkIconTheme
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@ -3802,6 +3865,54 @@ gtk_icon_info_load_icon (GtkIconInfo *icon_info,
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return icon_info->proxy_pixbuf;
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}
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/**
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* gtk_icon_info_load_surface:
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* @icon_info: a #GtkIconInfo structure from gtk_icon_theme_lookup_icon()
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* @for_window: (allow-none): #GdkWindow to optimize drawing for, or %NULL
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* @error: (allow-none): location to store error information on failure,
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* or %NULL.
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*
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* Renders an icon previously looked up in an icon theme using
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* gtk_icon_theme_lookup_icon(); the size will be based on the size
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* passed to gtk_icon_theme_lookup_icon(). Note that the resulting
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* surface may not be exactly this size; an icon theme may have icons
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* that differ slightly from their nominal sizes, and in addition GTK+
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* will avoid scaling icons that it considers sufficiently close to the
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* requested size or for which the source image would have to be scaled
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* up too far. (This maintains sharpness.). This behaviour can be changed
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* by passing the %GTK_ICON_LOOKUP_FORCE_SIZE flag when obtaining
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* the #GtkIconInfo. If this flag has been specified, the pixbuf
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* returned by this function will be scaled to the exact size.
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*
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* Return value: (transfer full): the rendered icon; this may be a newly
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* created icon or a new reference to an internal icon, so you must
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* not modify the icon. Use cairo_surface_destroy() to release your reference
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* to the icon.
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*
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* Since: 3.10
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**/
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cairo_surface_t *
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gtk_icon_info_load_surface (GtkIconInfo *icon_info,
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GdkWindow *for_window,
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GError **error)
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{
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GdkPixbuf *pixbuf;
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cairo_surface_t *surface;
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g_return_val_if_fail (icon_info != NULL, NULL);
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g_return_val_if_fail (error == NULL || *error == NULL, NULL);
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pixbuf = gtk_icon_info_load_icon (icon_info, error);
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if (pixbuf == NULL)
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return NULL;
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surface = gdk_cairo_surface_create_from_pixbuf (pixbuf, icon_info->desired_scale, for_window);
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g_object_unref (pixbuf);
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return surface;
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}
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static void
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load_icon_thread (GTask *task,
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gpointer source_object,
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@ -210,6 +210,14 @@ GdkPixbuf * gtk_icon_theme_load_icon_for_scale (GtkIconTheme
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gint scale,
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GtkIconLookupFlags flags,
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GError **error);
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GDK_AVAILABLE_IN_3_10
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cairo_surface_t * gtk_icon_theme_load_surface (GtkIconTheme *icon_theme,
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const gchar *icon_name,
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gint size,
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gint scale,
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GdkWindow *for_window,
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GtkIconLookupFlags flags,
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GError **error);
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GDK_AVAILABLE_IN_ALL
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GtkIconInfo * gtk_icon_theme_lookup_by_gicon (GtkIconTheme *icon_theme,
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@ -261,6 +269,10 @@ GdkPixbuf * gtk_icon_info_get_builtin_pixbuf (GtkIconInfo *icon_info
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GDK_AVAILABLE_IN_ALL
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GdkPixbuf * gtk_icon_info_load_icon (GtkIconInfo *icon_info,
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GError **error);
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GDK_AVAILABLE_IN_3_10
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cairo_surface_t * gtk_icon_info_load_surface (GtkIconInfo *icon_info,
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GdkWindow *for_window,
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GError **error);
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GDK_AVAILABLE_IN_3_8
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void gtk_icon_info_load_icon_async (GtkIconInfo *icon_info,
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GCancellable *cancellable,
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