Added C implementation (incomplete)

pixelnuke/pixelnuke.c

@@ -0,0 +1,104 @@
+#include "net.h"
+#include "canvas.h"
+
+#include <stdlib.h>
+#include <errno.h>
+#include <stdio.h> //sprintf
+
+int px_width = 1024;
+int px_height = 1024;
+
+const char * px_help_text =
+		"\
+PX x y: Get color at position (x,y)\n\
+PX x y rrggbb(aa): Draw a pixel (with optional alpha channel)\n\
+SIZE: Get canvas size";
+
+// Helper functions
+
+static int util_str_starts_with(const char* prefix, const char* str) {
+	char cp, cs;
+	while ((cp = *prefix++) == (cs = *str++)) {
+		if (cp == 0)
+			return 1;
+	}
+	return !cp;
+}
+
+// server callbacks
+void px_on_connect(NetClient *client) {
+
+}
+
+void px_on_read(NetClient *client, char *line) {
+	if (util_str_starts_with("PX ", line)) {
+		const char * ptr = line + 3;
+		char * endptr = (char*) ptr;
+		errno = 0;
+		unsigned int x = strtoul(ptr, &endptr, 10);
+		if (endptr == ptr || errno) {
+			net_err(client,
+					"First parameter missing or invalid (should be decimal)");
+			return;
+		}
+		unsigned int y = strtoul((ptr = endptr), &endptr, 10);
+		if (endptr == ptr || errno) {
+			net_err(client,
+					"Second parameter missing or invalid (should be decimal)");
+			return;
+		}
+		if (*endptr == 0) {
+			char str[64];
+			sprintf(str, "PX %u %u %x", x, y, 0xABCDEF);
+			net_send(client, str);
+			return;
+		}
+		unsigned int c = strtoul((ptr = endptr), &endptr, 16);
+		if (endptr == ptr || errno) {
+			net_err(client,
+					"Third parameter missing or invalid (should be hex color)");
+			return;
+		}
+		printf("%d %d %u=%x\n", x, y, c, c);
+	} else if (util_str_starts_with("SIZE", line)) {
+		unsigned int w, h;
+		canvas_get_size(&w, &h);
+		char str[64];
+		sprintf(str, "SIZE %d %d", w, h);
+		net_send(client, str);
+	} else if (util_str_starts_with("HELP", line)) {
+		net_send(client, px_help_text);
+	}
+}
+
+void px_on_close(NetClient *client, int error) {
+}
+
+void px_on_key(int key, int scancode, int mods) {
+	if (key == 300) { // F11
+		int display = canvas_get_display();
+		if(display<0)
+			canvas_fullscreen(0);
+		else
+			canvas_fullscreen(-1);
+	} else if (key == 301) { // F12
+		canvas_fullscreen(canvas_get_display()+1);
+	} else if (key == 81 || key == 256) { // q or ESC
+		canvas_close();
+	}
+}
+
+void px_on_resize() {}
+void px_on_window_close() {
+	printf("Window closed\n");
+	net_stop();
+}
+
+int main(int argc, char **argv) {
+	canvas_start(1024, &px_on_window_close);
+	canvas_setcb_key(&px_on_key);
+	canvas_setcb_resize(&px_on_resize);
+	net_start(1337, &px_on_connect, &px_on_read, &px_on_close);
+	return 0;
+}
+