From e35ebf33ab367c23d79180f04dfd623c4c0f5bb4 Mon Sep 17 00:00:00 2001
From: Elias Fleckenstein <fleckenstein@elidragon.com>
Date: Tue, 31 Aug 2021 12:04:07 +0000
Subject: cmd/rio: Add support for wallpapers (My implementation centers the
 wallpaper instead of repeating it)

---
 sys/src/cmd/rio/dat.h  |  1 +
 sys/src/cmd/rio/data.c | 33 +++++++++++++++++++++++++++++++--
 sys/src/cmd/rio/fns.h  |  2 ++
 sys/src/cmd/rio/rio.c  |  8 ++++++--
 4 files changed, 40 insertions(+), 4 deletions(-)

diff --git a/sys/src/cmd/rio/dat.h b/sys/src/cmd/rio/dat.h
index dac32da5f..93003780b 100644
--- a/sys/src/cmd/rio/dat.h
+++ b/sys/src/cmd/rio/dat.h
@@ -296,6 +296,7 @@ Cursor	query;
 Cursor	*corners[9];
 
 Image	*background;
+Image	*wallpaper;
 Image	*cols[NCOL];
 Image	*titlecol;
 Image	*lighttitlecol;
diff --git a/sys/src/cmd/rio/data.c b/sys/src/cmd/rio/data.c
index 86e43c72f..55a26d4b7 100644
--- a/sys/src/cmd/rio/data.c
+++ b/sys/src/cmd/rio/data.c
@@ -173,10 +173,39 @@ Cursor *corners[9] = {
 };
 
 void
-iconinit(void)
+backgroundinit(void)
+{		
+	background = allocimage(display, screen->r, screen->chan, 1, 0x777777FF);
+	
+	if (wallpaper) {
+		Rectangle r = Rect(
+			(screen->r.min.x + screen->r.max.x - Dx(wallpaper->r)) / 2,
+			(screen->r.min.y + screen->r.max.y - Dy(wallpaper->r)) / 2,
+			(screen->r.min.x + screen->r.max.x + Dx(wallpaper->r)) / 2,
+			(screen->r.min.y + screen->r.max.y + Dy(wallpaper->r)) / 2
+		);
+
+		draw(background, r, wallpaper, nil, wallpaper->r.min);
+	}
+}
+
+void
+wallpaperinit(void)
 {
-	background = allocimage(display, Rect(0,0,1,1), screen->chan, 1, 0x777777FF);
+	int fd;
+	
+	fd = open("/usr/glenda/lib/wallpaper", OREAD);
+	if(fd >= 0) {
+		wallpaper = readimage(display, fd, 0);
+		close(fd);
+	} else {
+		wallpaper = nil;
+	}
+}
 
+void
+iconinit(void)
+{
 	/* greys are multiples of 0x11111100+0xFF, 14* being palest */
 	cols[BACK] = allocimage(display, Rect(0,0,1,1), CMAP8, 1, 0xFFFFFFFF^reverse);
 	cols[BORD] = allocimage(display, Rect(0,0,1,1), CMAP8, 1, 0x999999FF^reverse);
diff --git a/sys/src/cmd/rio/fns.h b/sys/src/cmd/rio/fns.h
index 8562c2cd9..4d4597355 100644
--- a/sys/src/cmd/rio/fns.h
+++ b/sys/src/cmd/rio/fns.h
@@ -17,6 +17,8 @@ void	error(char*);
 void	killprocs(void);
 int	shutdown(void*, char*);
 void	iconinit(void);
+void	wallpaperinit(void);
+void	backgroundinit(void);
 void	*erealloc(void*, uint);
 void *emalloc(uint);
 char *estrdup(char*);
diff --git a/sys/src/cmd/rio/rio.c b/sys/src/cmd/rio/rio.c
index 9c18a6955..29fa11426 100644
--- a/sys/src/cmd/rio/rio.c
+++ b/sys/src/cmd/rio/rio.c
@@ -186,6 +186,8 @@ threadmain(int argc, char *argv[])
 		exits("display open");
 	}
 	iconinit();
+	wallpaperinit();
+	backgroundinit();
 
 	exitchan = chancreate(sizeof(int), 0);
 	winclosechan = chancreate(sizeof(Window*), 0);
@@ -202,7 +204,7 @@ threadmain(int argc, char *argv[])
 	wscreen = allocscreen(screen, background, 0);
 	if(wscreen == nil)
 		error("can't allocate screen");
-	draw(view, viewr, background, nil, ZP);
+	draw(view, Rect(0, 0, viewr.max.x, viewr.max.y), background, nil, ZP);
 	flushimage(display, 1);
 
 	timerinit();
@@ -594,10 +596,12 @@ resized(void)
 	freescrtemps();
 	view = screen;
 	freescreen(wscreen);
+	freeimage(background);
+	backgroundinit();
 	wscreen = allocscreen(screen, background, 0);
 	if(wscreen == nil)
 		error("can't re-allocate screen");
-	draw(view, view->r, background, nil, ZP);
+	draw(view, Rect(0, 0, view->r.max.x, view->r.max.y), background, nil, ZP);
 	o = subpt(viewr.max, viewr.min);
 	n = subpt(view->clipr.max, view->clipr.min);
 	qsort(window, nwindow, sizeof(window[0]), wtopcmp);
-- 
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