[PATCH 09/15] window: Add window_get_output_scale()

[alexl at redhat.com]

From: Alexander Larsson <alexl at redhat.com>

This lets you find the maximal scale for all the outputs a window
is on, which is useful for picking a buffer_scale.
---
 clients/window.c | 18 ++++++++++++++++++
 clients/window.h |  3 +++
 2 files changed, 21 insertions(+)

diff --git a/clients/window.c b/clients/window.c
index 6dd6533..09573f6 100644
--- a/clients/window.c
+++ b/clients/window.c
@@ -1454,6 +1454,22 @@ window_get_buffer_scale(struct window *window)
 	return window->main_surface->buffer_scale;
 }
 
+uint32_t
+window_get_output_scale(struct window *window)
+{
+	struct window_output *window_output;
+	struct window_output *window_output_tmp;
+	int scale = 1;
+
+	wl_list_for_each_safe(window_output, window_output_tmp,
+			      &window->window_output_list, link) {
+		if (window_output->output->scale > scale)
+			scale = window_output->output->scale;
+	}
+
+	return scale;
+}
+
 static void frame_destroy(struct frame *frame);
 
 static void
@@ -4370,6 +4386,8 @@ window_show_menu(struct display *display,
 
 	menu->window = window;
 	menu->widget = window_add_widget(menu->window, menu);
+	window_set_buffer_scale (menu->window, window_get_buffer_scale (parent));
+	window_set_buffer_transform (menu->window, window_get_buffer_transform (parent));
 	menu->entries = entries;
 	menu->count = count;
 	menu->release_count = 0;
diff --git a/clients/window.h b/clients/window.h
index fec601f..f7b3f28 100644
--- a/clients/window.h
+++ b/clients/window.h
@@ -260,6 +260,9 @@ void
 window_set_buffer_scale(struct window *window,
                         uint32_t scale);
 
+uint32_t
+window_get_output_scale(struct window *window);
+
 void
 window_destroy(struct window *window);
 
-- 
1.8.1.4