From: Simon Glass <sjg@chromium.org>
Date: Fri, 2 May 2025 14:46:53 +0000 (-0600)
Subject: expo: Provide a way to position things relative to display
X-Git-Tag: v2025.10-rc1~118^2~56^2~5
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ddd1c97653560c6015f2c165de459ebfdc79f5d7;p=thirdparty%2Fu-boot.git

expo: Provide a way to position things relative to display

It is often necessary to centre objects within the display area. Add a
special position value to indicate this.

Signed-off-by: Simon Glass <sjg@chromium.org>
---

diff --git a/boot/scene.c b/boot/scene.c
index 237f2bccc00..fa8f540bfb0 100644
--- a/boot/scene.c
+++ b/boot/scene.c
@@ -364,6 +364,11 @@ static void handle_alignment(enum scene_obj_align horiz,
 {
 	int width, height;
 
+	if (bbox->x1 == SCENEOB_DISPLAY_MAX)
+		bbox->x1 = xsize ?: 1280;
+	if (bbox->y1 == SCENEOB_DISPLAY_MAX)
+		bbox->y1 = ysize ?: 1024;
+
 	width = bbox->x1 - bbox->x0;
 	height = bbox->y1 - bbox->y0;
 
diff --git a/include/expo.h b/include/expo.h
index 2addddd5012..4dee479e9a0 100644
--- a/include/expo.h
+++ b/include/expo.h
@@ -242,6 +242,12 @@ struct scene_obj_dims {
 	int y;
 };
 
+/* special values for dimensions */
+enum {
+	/* width/height of the display */
+	SCENEOB_DISPLAY_MAX	= 0x7f000000,
+};
+
 /**
  * enum scene_obj_halign - Horizontal alignment of objects
  *