Introduce intel-gpu-overlay

A realtime display of GPU activity. Note, this is just at the point of
minimum usability...

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 37 insertions, 0 deletions

diff --git a/overlay/overlay.h b/overlay/overlay.h
new file mode 100644
index 00000000..7c5b2d86
--- /dev/null
+++ b/overlay/overlay.h
@@ -0,0 +1,37 @@
+#include <cairo.h>
+
+enum position {
+	POS_UNSET = -1,
+
+	POS_LEFT = 0,
+	POS_CENTRE = 1,
+	POS_RIGHT = 2,
+
+	POS_TOP = 0 << 4,
+	POS_MIDDLE = 1 << 4,
+	POS_BOTTOM = 2 << 4,
+
+	POS_TOP_LEFT = POS_TOP | POS_LEFT,
+	POS_TOP_CENTRE = POS_TOP | POS_CENTRE,
+	POS_TOP_RIGHT = POS_TOP | POS_RIGHT,
+
+	POS_MIDDLE_LEFT = POS_MIDDLE | POS_LEFT,
+	POS_MIDDLE_CENTRE = POS_MIDDLE | POS_CENTRE,
+	POS_MIDDLE_RIGHT = POS_MIDDLE | POS_RIGHT,
+
+	POS_BOTTOM_LEFT = POS_BOTTOM | POS_LEFT,
+	POS_BOTTOM_CENTRE = POS_BOTTOM | POS_CENTRE,
+	POS_BOTTOM_RIGHT = POS_BOTTOM | POS_RIGHT,
+};
+
+struct overlay {
+	cairo_surface_t *surface;
+	void (*show)(struct overlay *);
+	void (*position)(struct overlay *, enum position);
+	void (*hide)(struct overlay *);
+};
+
+extern const cairo_user_data_key_t overlay_key;
+
+cairo_surface_t *x11_overlay_create(enum position pos, int max_width, int max_height);
+void x11_overlay_stop(void);