vulkan/ios: keep track of surface changes

gst-libs/gst/vulkan/gstvkswapper.c

@@ -66,10 +66,12 @@ struct _GstVulkanSwapperPrivate
   /* runtime variables */
   gint to_quit;
   GstBuffer *current_buffer;
+  gboolean any_current_extent;
 
   /* signal handlers */
   gulong close_id;
   gulong draw_id;
+  gulong resize_id;
 
   /* properties */
   gboolean force_aspect_ratio;
@@ -104,6 +106,8 @@ G_DEFINE_TYPE_WITH_CODE (GstVulkanSwapper, gst_vulkan_swapper,
 
 static void _on_window_draw (GstVulkanWindow * window,
     GstVulkanSwapper * swapper);
+static void _on_window_resize (GstVulkanWindow * window,
+    guint width, guint height, GstVulkanSwapper * swapper);
 
 static gboolean
 _get_function_table (GstVulkanSwapper * swapper)
@@ -525,6 +529,9 @@ gst_vulkan_swapper_finalize (GObject * object)
   g_signal_handler_disconnect (swapper->window, swapper->priv->close_id);
   swapper->priv->close_id = 0;
 
+  g_signal_handler_disconnect (swapper->window, swapper->priv->resize_id);
+  swapper->priv->resize_id = 0;
+
   if (swapper->window)
     gst_object_unref (swapper->window);
   swapper->window = NULL;
@@ -586,6 +593,8 @@ gst_vulkan_swapper_new (GstVulkanDevice * device, GstVulkanWindow * window)
       (GCallback) _on_window_close, swapper);
   swapper->priv->draw_id = g_signal_connect (swapper->window, "draw",
       (GCallback) _on_window_draw, swapper);
+  swapper->priv->resize_id = g_signal_connect (swapper->window, "resize",
+      (GCallback) _on_window_resize, swapper);
 
   return swapper;
 }
@@ -672,11 +681,15 @@ _allocate_swapchain (GstVulkanSwapper * swapper, GstCaps * caps,
   if (swapper->priv->surf_props.currentExtent.width == -1) {
     /* If the surface size is undefined, the size is set to
      * the size of the images requested. */
-    swapchain_dims.width = 320;
-    swapchain_dims.height = 240;
+    guint width, height;
+    gst_vulkan_window_get_surface_dimensions (swapper->window, &width, &height);
+    swapchain_dims.width = width;
+    swapchain_dims.height = height;
+    swapper->priv->any_current_extent = TRUE;
   } else {
     /* If the surface size is defined, the swap chain size must match */
     swapchain_dims = swapper->priv->surf_props.currentExtent;
+    swapper->priv->any_current_extent = FALSE;
   }
 
   /* If mailbox mode is available, use it, as is the lowest-latency non-
@@ -1319,3 +1332,18 @@ _on_window_draw (GstVulkanWindow * window, GstVulkanSwapper * swapper)
   g_clear_error (&error);
   RENDER_UNLOCK (swapper);
 }
+
+static void
+_on_window_resize (GstVulkanWindow * window, guint width, guint height,
+    GstVulkanSwapper * swapper)
+{
+  GError *error = NULL;
+
+  RENDER_LOCK (swapper);
+  if (swapper->priv->any_current_extent) {
+    if (!_swapchain_resize (swapper, &error))
+      GST_ERROR_OBJECT (swapper, "Failed to resize swapchain: %s",
+          error->message);
+  }
+  RENDER_UNLOCK (swapper);
+}

gst-libs/gst/vulkan/gstvkwindow.c

@@ -93,6 +93,7 @@ enum
   SIGNAL_0,
   SIGNAL_CLOSE,
   SIGNAL_DRAW,
+  SIGNAL_RESIZE,
   LAST_SIGNAL
 };
 
@@ -193,6 +194,10 @@ gst_vulkan_window_class_init (GstVulkanWindowClass * klass)
       g_signal_new ("draw", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, 0,
       NULL, NULL, NULL, G_TYPE_NONE, 0);
 
+  gst_vulkan_window_signals[SIGNAL_RESIZE] =
+      g_signal_new ("resize", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, 0,
+      NULL, NULL, NULL, G_TYPE_NONE, 2, G_TYPE_UINT, G_TYPE_UINT);
+
   gobject_class->set_property = gst_vulkan_window_set_property;
   gobject_class->get_property = gst_vulkan_window_get_property;
   gobject_class->finalize = gst_vulkan_window_finalize;
@@ -394,7 +399,8 @@ gst_vulkan_window_resize (GstVulkanWindow * window, gint width, gint height)
   window->priv->surface_width = width;
   window->priv->surface_height = height;
 
-  /* XXX: possibly queue a resize/redraw */
+  g_signal_emit (window, gst_vulkan_window_signals[SIGNAL_RESIZE], 0, width,
+      height);
 }
 
 /**
@@ -431,6 +437,25 @@ gst_vulkan_window_set_window_handle (GstVulkanWindow * window, guintptr handle)
   }
 }
 
+void
+gst_vulkan_window_get_surface_dimensions (GstVulkanWindow * window,
+    guint * width, guint * height)
+{
+  GstVulkanWindowClass *klass;
+
+  g_return_if_fail (GST_IS_VULKAN_WINDOW (window));
+  klass = GST_VULKAN_WINDOW_GET_CLASS (window);
+
+  if (klass->get_surface_dimensions) {
+    klass->get_surface_dimensions (window, width, height);
+  } else {
+    GST_DEBUG_OBJECT (window, "Returning size %ix%i",
+        window->priv->surface_width, window->priv->surface_height);
+    *width = window->priv->surface_width;
+    *height = window->priv->surface_height;
+  }
+}
+
 GType gst_vulkan_dummy_window_get_type (void);
 G_DEFINE_TYPE (GstVulkanDummyWindow, gst_vulkan_dummy_window,
     GST_TYPE_VULKAN_WINDOW);

gst-libs/gst/vulkan/gstvkwindow.h

@@ -90,6 +90,9 @@ struct _GstVulkanWindowClass {
                                                  guint32 queue_family_idx);
   void          (*set_window_handle)            (GstVulkanWindow *window,
                                                  guintptr handle);
+  void          (*get_surface_dimensions)       (GstVulkanWindow *window,
+                                                 guint * width,
+                                                 guint * height);
 
   /*< private >*/
   gpointer _reserved[GST_PADDING];
@@ -108,6 +111,10 @@ gboolean           gst_vulkan_window_get_presentation_support       (GstVulkanWi
                                                                      GstVulkanDevice *device,
                                                                      guint32 queue_family_idx);
 GST_VULKAN_API
+void               gst_vulkan_window_get_surface_dimensions         (GstVulkanWindow *window,
+                                                                     guint *width,
+                                                                     guint *height);
+GST_VULKAN_API
 void               gst_vulkan_window_set_window_handle              (GstVulkanWindow *window,
                                                                      guintptr handle);
 

gst-libs/gst/vulkan/ios/gstvkios_utils.h

@@ -29,6 +29,7 @@
 G_BEGIN_DECLS
 
 @interface GstVulkanUIView : UIView
+- (void) setGstWindow:(GstVulkanWindowIos *)window_ios;
 @end
 
 typedef void (*GstVulkanWindowFunc) (gpointer data);

gst-libs/gst/vulkan/ios/gstvkwindow_ios.m

@@ -142,7 +142,9 @@ _create_window (GstVulkanWindowIos * window_ios)
   GstVulkanUIView *view;
 
   view = [[GstVulkanUIView alloc] initWithFrame:rect];
+  [view setGstWindow:window_ios];
   view.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
+  view.contentMode = UIViewContentModeRedraw;
 
   priv->internal_view = (__bridge_retained gpointer)view;
   [external_view addSubview:view];
@@ -216,7 +218,9 @@ static void
 gst_vulkan_window_ios_close (GstVulkanWindow * window)
 {
   GstVulkanWindowIos *window_ios = GST_VULKAN_WINDOW_IOS (window);
+  GstVulkanUIView *view = (__bridge GstVulkanUIView *) window_ios->priv->internal_view;
 
+  [view setGstWindow:NULL];
   CFBridgingRelease (window_ios->priv->internal_view);
   window_ios->priv->internal_view = NULL;
 
@@ -240,13 +244,36 @@ gst_vulkan_window_ios_set_window_handle (GstVulkanWindow * window,
   window_ios->priv->external_view = view;
 }
 
-@implementation GstVulkanUIView
+@implementation GstVulkanUIView {
+    GstVulkanWindowIos * window_ios;
+
+    guint width;
+    guint height;
+};
 
 +(Class) layerClass
 {
   return [CAMetalLayer class];
 }
 
+-(void) setGstWindow:(GstVulkanWindowIos *) window
+{
+  window_ios = window;
+}
+
+-(void) layoutSubViews
+{
+  [super layoutSubviews];
+  CGSize rect = self.bounds.size;
+  GST_ERROR ("%ix%i", (int) rect.width, (int) rect.height);
+  gboolean resize = self->width != rect.width || self->height != rect.height;
+  self->width = rect.width;
+  self->height = rect.height;
+  if (resize && self->window_ios) {
+    gst_vulkan_window_resize (GST_VULKAN_WINDOW (self->window_ios), rect.width, rect.height);
+  }
+}
+
 @end
 
 void