[PATCH] desktop-shell: support an option to use 16 bit color or not, instead of using it by default

[nerdopolis]

---
 clients/desktop-shell.c | 13 +++++++++++--
 man/weston.ini.man      |  4 ++++
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/clients/desktop-shell.c b/clients/desktop-shell.c
index e2f9f80..d4ba127 100644
--- a/clients/desktop-shell.c
+++ b/clients/desktop-shell.c
@@ -94,6 +94,7 @@ struct background {
 	char *image;
 	int type;
 	uint32_t color;
+	int32_t low_bpp;
 };
 
 struct output {
@@ -1015,10 +1016,18 @@ background_create(struct desktop *desktop)
 	window_set_user_data(background->window, background);
 	widget_set_redraw_handler(background->widget, background_draw);
 	widget_set_transparent(background->widget, 0);
-	window_set_preferred_format(background->window,
-				    WINDOW_PREFERRED_FORMAT_RGB565);
 
 	s = weston_config_get_section(desktop->config, "shell", NULL, NULL);
+	weston_config_section_get_bool(s, "background-low-bpp",
+					 &background->low_bpp, NULL);
+	if (!background->low_bpp) {
+	  window_set_preferred_format(background->window,
+				      WINDOW_PREFERRED_FORMAT_NONE);
+	} else {
+	  window_set_preferred_format(background->window,
+				      WINDOW_PREFERRED_FORMAT_RGB565);
+	}
+
 	weston_config_section_get_string(s, "background-image",
 					 &background->image, NULL);
 	weston_config_section_get_uint(s, "background-color",
diff --git a/man/weston.ini.man b/man/weston.ini.man
index fe86bb6..3a8b2a4 100644
--- a/man/weston.ini.man
+++ b/man/weston.ini.man
@@ -216,6 +216,10 @@ output. Tile repeats the background image to fill the output.
 sets the color of the background (unsigned integer). The hexadecimal
 digit pairs are in order alpha, red, green, and blue.
 .TP 7
+.BI "background-low-bpp=" true
+specify to reduce the background to 16 bit color (boolean). This option is
+useful for low memory platforms. This only affects the background.
+.TP 7
 .BI "panel-color=" 0xAARRGGBB
 sets the color of the panel (unsigned integer). The hexadecimal
 digit pairs are in order transparency, red, green, and blue. Examples:
-- 
2.1.0