Add example that draws a png

Makefile

@@ -1,4 +1,4 @@
-all: libneatvnc.so.0.0
+all: libneatvnc.so
 
 DEPENDENCIES := pixman-1 libpng libuv
 
@@ -10,19 +10,31 @@ LDFLAGS := $(foreach dep,$(DEPENDENCIES),$(shell pkg-config --libs $(dep)))
 libneatvnc.so.0.0: src/server.o src/util.o src/vec.o src/zrle.o src/pngfb.o
 	$(CC) -fPIC -shared $^ $(LDFLAGS) -o $@
 
+libneatvnc.so.0: libneatvnc.so.0.0
+	ln -s $^ $@
+
+libneatvnc.so: libneatvnc.so.0
+	ln -s $^ $@
+
 zrle-bench: bench/zrle-bench.o src/server.o src/util.o src/vec.o src/zrle.o \
 		src/pngfb.o
 	$(CC) $^ $(LDFLAGS) -o $@
 
+examples/png-server: examples/png-server.o src/pngfb.o libneatvnc.so
+	$(CC) $^ $(LDFLAGS) -L. -lneatvnc -Wl,-rpath=$(shell pwd) -o $@
+
 src/%.o: src/%.c
 	$(CC) -c $(CFLAGS) $< -o $@ -MMD -MP -MF $@.deps
 
 bench/%.o: bench/%.c
 	$(CC) -c $(CFLAGS) $< -o $@ -MMD -MP -MF $@.deps
 
+examples/%.o: examples/%.c
+	$(CC) -c $(CFLAGS) $< -o $@ -MMD -MP -MF $@.deps
+
 .PHONY: clean
 clean:
-	rm -f libneatvnc.so.0.0
+	rm -f libneatvnc.so*
 	rm -f src/*.o src/*.deps bench/*.o bench/*.deps
 
 -include src/*.deps

examples/png-server.c

@@ -0,0 +1,50 @@
+#include "neatvnc.h"
+
+#include <stdio.h>
+#include <uv.h>
+#include <assert.h>
+#include <pixman.h>
+
+int read_png_file(struct nvnc_fb* fb, const char *filename);
+
+void on_fb_req(struct nvnc *nvnc, bool incremental, uint16_t x, uint16_t y,
+	       uint16_t width, uint16_t height)
+{
+	if (incremental)
+		return;
+
+	struct nvnc_fb *fb = nvnc_get_userdata(nvnc);
+	assert(fb);
+
+	struct pixman_region16 region;
+	pixman_region_init_rect(&region, 0, 0, fb->width, fb->height);
+	nvnc_update_fb(nvnc, fb, &region);
+	pixman_region_fini(&region);
+}
+
+int main(int argc, char *argv[])
+{
+	const char *file = argv[1];
+
+	if (!file) {
+		printf("Missing argument\n");
+		return 1;
+	}
+
+	struct nvnc_fb fb;
+	if (read_png_file(&fb, file) < 0) {
+		printf("Failed to read png file\n");
+		return 1;
+	}
+
+	struct nvnc *server = nvnc_open("127.0.0.1", 5900);
+
+	nvnc_set_dimensions(server, fb.width, fb.height, fb.fourcc_format);
+	nvnc_set_name(server, file);
+	nvnc_set_fb_req_fn(server, on_fb_req);
+	nvnc_set_userdata(server, &fb);
+
+	uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+
+	nvnc_close(server);
+}