Add solid-color rendering to swaybg

include/cairo.h

@@ -0,0 +1,18 @@
+#ifndef _SWAY_CAIRO_H
+#define _SWAY_CAIRO_H
+#include <stdint.h>
+#include <cairo/cairo.h>
+
+void cairo_set_source_u32(cairo_t *cairo, uint32_t color);
+
+cairo_surface_t *cairo_image_surface_scale(cairo_surface_t *image,
+		int width, int height);
+
+#ifdef WITH_GDK_PIXBUF
+#include <gdk-pixbuf/gdk-pixbuf.h>
+
+cairo_surface_t* gdk_cairo_image_surface_create_from_pixbuf(
+		const GdkPixbuf *gdkbuf);
+#endif //WITH_GDK_PIXBUF
+
+#endif