Add option to set window background color

This window background color is different than window.clear(color)
because this window color is the background color if the window itself,
which means if there is a delay between creating the window and the
first frame display then the window background color is black,
but if window color is set then that color will be displayed instead.
Normally you want to set the window background color to the same
color as the color you use in window.clear(color).

1 files changed, 1 insertions, 0 deletions

diff --git a/include/mgl/window/window.h b/include/mgl/window/window.h
index 27926b2..cb5a2eb 100644
--- a/include/mgl/window/window.h
+++ b/include/mgl/window/window.h
@@ -54,6 +54,7 @@ typedef struct {
     bool hidden;                     /* false by default */
     bool override_redirect;          /* false by default */
     bool support_alpha;              /* support alpha for the window, false by default */
+    mgl_color background_color;      /* default: black */
 } mgl_window_create_params;
 
 typedef enum {