Implement window icons.

[rrace.git] / src / motif.h

diff --git a/src/motif.h b/src/motif.h
index 171739d9e1fcb0e804ba4ee0173542b64548754f..74893d15a2f2b4b07dc81d11ffb0260368968dac 100644 (file)
--- a/src/motif.h
+++ b/src/motif.h
@@ -29,13 +29,49 @@ struct app_state {
 
        Widget game, goal;
 
+       /* Whether to set _NET_WM_ICON property on WMShell */
+       int use_ewmh_icons;
+
        GC tile_gc;
+       Pixmap icon_pixmap;
        uint_least32_t tile_colour[TILE_MAX-1][3];
 };
 
 void ui_initialize(struct app_state *state, Widget shell);
 void x11_initialize(struct app_state *state, Screen *screen);
+void x11_redraw_icon(struct app_state *state, Widget shell);
 void x11_redraw_goal(struct app_state *state);
 void x11_redraw_game(struct app_state *state);
 
+/*
+ * Helpers for drawing window icons in various sizes.  The tileXX functions
+ * draw one (out of 9) tiles at a particular size using a particular colour
+ * set.  Call for each tile position to draw a complete icon.
+ */
+
+enum { ICON_16x16, ICON_24x24, ICON_32x32, ICON_48x48, ICON_MAX };
+#define EWMH_ICON_NELEM (2+16*16 + 2+24*24 + 2+32*32 + 2+48*48)
+
+void ewmh_tile16(unsigned long *icon, const XColor *c, int tile_x, int tile_y);
+void ewmh_tile24(unsigned long *icon, const XColor *c, int tile_x, int tile_y);
+void ewmh_tile32(unsigned long *icon, const XColor *c, int tile_x, int tile_y);
+void ewmh_tile48(unsigned long *icon, const XColor *c, int tile_x, int tile_y);
+
+/*
+ * Allocate storage for the EWMH _NET_WM_ICON array.  The sizes array is
+ * populated with pointers to the beginning of each icon's pixel data.  For
+ * example, sizes[ICON_24x24] points to the first pixel of the 24x24 image.
+ *
+ * The returned value can then be passed to XChangeProperty to set the icon,
+ * (use EWMH_ICON_NELEM for the number of elements) and must be freed by the
+ * caller.
+ */
+void *ewmh_icon_alloc(unsigned long **sizes);
+
+/*
+ * Check if the root window indicates support for EWMH icons.  Returns 1 if
+ * supported, or 0 otherwise.
+ */
+int ewmh_probe_wm_icon(Widget shell);
+
 #endif