*: refactor all the things

Long overdue house cleaning.

The addition of compositing/monitoring overlays in vwm3 pushed vwm well past
what is a reasonable size for a simple thousand line file.  This is a first
step towards restoring sanity in the code, but no behavioral differences are
intended, this is mostly just shuffling around and organizing code.

I expect some performance regressions initially, follow-on commits will make
more improvements to that end as the dust settles.

1 files changed, 36 insertions, 0 deletions

diff --git a/src/overlay.h b/src/overlay.h
new file mode 100644
index 0000000..94e2dca
--- /dev/null
+++ b/src/overlay.h
@@ -0,0 +1,36 @@
+#ifndef _OVERLAY_H
+#define _OVERLAY_H
+
+#include <X11/Xlib.h>
+#include <X11/extensions/Xrender.h>
+
+typedef struct _vwm_t vwm_t;
+typedef struct _vwm_xwindow_t vwm_xwindow_t;
+
+/* everything needed by the per-window overlay's context */
+typedef struct _vwm_overlay_t {
+	Pixmap			text_pixmap;		/* pixmap for overlayed text (kept around for XDrawText usage) */
+	Picture			text_picture;		/* picture representation of text_pixmap */
+	Picture			shadow_picture;		/* text shadow layer */
+	Picture			grapha_picture;		/* graph A layer */
+	Picture			graphb_picture;		/* graph B layer */
+	Picture			tmp_picture;		/* 1 row worth of temporary picture space */
+	Picture			picture;		/* overlay picture derived from the pixmap, for render compositing */
+	int			width;			/* current width of the overlay */
+	int			height;			/* current height of the overlay */
+	int			phase;			/* current position within the (horizontally scrolling) graphs */
+	int			heirarchy_end;		/* row where the process heirarchy currently ends */
+	int			snowflakes_cnt;		/* count of snowflaked rows (reset to zero to truncate snowflakes display) */
+	int			gen_last_composed;	/* the last composed vmon generation */
+} vwm_overlay_t;
+
+int vwm_overlay_xwin_composed_height(vwm_t *vwm, vwm_xwindow_t *xwin);
+void vwm_overlay_xwin_reset_snowflakes(vwm_t *vwm, vwm_xwindow_t *xwin);
+void vwm_overlay_xwin_create(vwm_t *vwm, vwm_xwindow_t *xwin);
+void vwm_overlay_xwin_destroy(vwm_t *vwm, vwm_xwindow_t *xwin);
+void vwm_overlay_xwin_compose(vwm_t *vwm, vwm_xwindow_t *xwin);
+void vwm_overlay_rate_increase(vwm_t *vwm);
+void vwm_overlay_rate_decrease(vwm_t *vwm);
+void vwm_overlay_update(vwm_t *vwm, int *desired_delay);
+
+#endif