simplify the job scheduler. correct two mistakes regarding the Viewport.

> They made two mistakes. they hanged the wrong man and they didn't finish the job.

so Clint Eastwood came back to kick my ass. the mistakes in
question were that the Viewport shouldn't know about double
buffering, conceptually it has a framebuffer and that's it.
the second one was passing it to the renderer, when the
renderer couldn't care less about what a viewport is.

1 files changed, 14 insertions, 0 deletions

diff --git a/fb.c b/fb.c
index 17496ac..02c984d 100644
--- a/fb.c
+++ b/fb.c
@@ -46,6 +46,18 @@ framebufctl_reset(Framebufctl *ctl)
 	memfillcolor(fb->cb, DTransparent);
 }
 
+static Framebuf *
+framebufctl_getfb(Framebufctl *ctl)
+{
+	return ctl->fb[ctl->idx];	/* front buffer */
+}
+
+static Framebuf *
+framebufctl_getbb(Framebufctl *ctl)
+{
+	return ctl->fb[ctl->idx^1];	/* back buffer */
+}
+
 Framebuf *
 mkfb(Rectangle r)
 {
@@ -81,6 +93,8 @@ mkfbctl(Rectangle r)
 	fc->memdraw = framebufctl_memdraw;
 	fc->swap = framebufctl_swap;
 	fc->reset = framebufctl_reset;
+	fc->getfb = framebufctl_getfb;
+	fc->getbb = framebufctl_getbb;
 	return fc;
 }