Add swaybar basics

This should make the bar open and appear as the panel, once sway
supports panels. Right now it crashes sway!

swaybar/main.c

@@ -4,8 +4,57 @@
 #include "client/window.h"
 #include "log.h"
 
+struct box_colors {
+	uint32_t border;
+	uint32_t background;
+	uint32_t text;
+};
+
+struct colors {
+	uint32_t background;
+	uint32_t statusline;
+	uint32_t seperator;
+
+	struct box_colors focused_workspace;
+	struct box_colors active_workspace;
+	struct box_colors inactive_workspace;
+	struct box_colors urgent_workspace;
+	struct box_colors binding_mode;
+};
+
 struct registry *registry;
 struct window *window;
+struct colors colors = {
+	.background = 0x00000000,
+	.statusline = 0xffffffff,
+	.seperator = 0x666666ff,
+
+	.focused_workspace = {
+		.border = 0x4c7899ff,
+		.background = 0x285577ff,
+		.text = 0xffffffff
+	},
+	.active_workspace = {
+		.border = 0x333333ff,
+		.background = 0x5f676aff,
+		.text = 0xffffffff
+	},
+	.inactive_workspace = {
+		.border = 0x333333ff,
+		.background = 0x222222ff,
+		.text = 0x888888ff
+	},
+	.urgent_workspace = {
+		.border = 0x2f343aff,
+		.background = 0x900000ff,
+		.text = 0xffffffff
+	},
+	.binding_mode = {
+		.border = 0x2f343aff,
+		.background = 0x900000ff,
+		.text = 0xffffffff
+	},
+};
 
 void sway_terminate(void) {
 	window_teardown(window);
@@ -13,8 +62,54 @@ void sway_terminate(void) {
 	exit(EXIT_FAILURE);
 }
 
+void cairo_set_source_u32(cairo_t *cairo, uint32_t color) {
+	cairo_set_source_rgba(cairo, 
+			((color & 0xFF000000) >> 24) / 256.0,
+			((color & 0xFF0000) >> 16) / 256.0,
+			((color & 0xFF00) >> 8) / 256.0,
+			(color & 0xFF) / 256.0);
+}
+
+void render() {
+	// Reset buffer
+	cairo_save(window->cairo);
+	cairo_set_operator(window->cairo, CAIRO_OPERATOR_CLEAR);
+	cairo_paint(window->cairo);
+	cairo_restore(window->cairo);
+
+	// Draw bar
+	cairo_set_source_u32(window->cairo, colors.background);
+	cairo_paint(window->cairo);
+}
+
 int main(int argc, char **argv) {
 	init_log(L_INFO);
-	sway_log(L_INFO, "Hello world!");
+	registry = registry_poll();
+
+	if (!registry->desktop_shell) {
+		sway_abort("swaybar requires the compositor to support the desktop-shell extension.");
+	}
+
+	int desired_output = atoi(argv[1]);
+	sway_log(L_INFO, "Using output %d of %d", desired_output, registry->outputs->length);
+
+	struct output_state *output = registry->outputs->items[desired_output];
+	window = window_setup(registry, output->width, 30, false);
+	if (!window) {
+		sway_abort("Failed to create window.");
+	}
+	desktop_shell_set_panel(registry->desktop_shell, output->output, window->surface);
+	desktop_shell_set_panel_position(registry->desktop_shell, DESKTOP_SHELL_PANEL_POSITION_BOTTOM);
+
+	do {
+		if (window_prerender(window) && window->cairo) {
+			render();
+			window_render(window);
+		}
+	} while (wl_display_dispatch(registry->display) != -1);
+
+	window_teardown(window);
+	registry_teardown(registry);
+
 	return 0;
 }

swaybg/main.c

@@ -49,12 +49,10 @@ int main(int argc, const char **argv) {
 	sway_log(L_INFO, "Using output %d of %d", desired_output, registry->outputs->length);
 	int i;
 	struct output_state *output = registry->outputs->items[desired_output];
-	struct window *window = window_setup(registry, 100, 100, false);
+	struct window *window = window_setup(registry, output->width, output->height, false);
 	if (!window) {
 		sway_abort("Failed to create surfaces.");
 	}
-	window->width = output->width;
-	window->height = output->height;
 	desktop_shell_set_background(registry->desktop_shell, output->output, window->surface);
 	list_add(surfaces, window);