Moved screen buffer code to seperate file.

C/Server/main.c

@@ -0,0 +1,107 @@
+#include <unistd.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <netinet/in.h>
+#include <netdb.h>
+#include <arpa/inet.h>
+#include <sys/socket.h>
+
+#include "screenbuffer.h"
+
+#define UDP_PORT 5005    // the port users will be connecting to
+#define DISCOVER_PORT 5006    // the port on which the server will broadcast its details
+
+static void die(char *msg)
+{
+	fprintf(stderr, "%s\n", msg);
+	exit(EXIT_FAILURE);
+}
+
+static int get_udp_socket(int port)
+{
+	int sock_fd;
+	struct sockaddr_in6 addr;
+
+	memset(&addr, 0, sizeof(addr));
+
+	if ( ( sock_fd = socket(PF_INET6, SOCK_DGRAM,0) ) < 0 )
+		die("could not create socket");
+
+	addr.sin6_port = htons(port);
+	addr.sin6_family = AF_INET6;
+	addr.sin6_addr = in6addr_any;
+
+	if ( bind(sock_fd, (struct sockaddr *)&addr, sizeof(addr)) < 0 )
+		die("could not bind to UDP");
+
+	return sock_fd;
+}
+
+
+static ssize_t get_udp_packet(int sock_fd, char *packet, size_t size)
+{
+	ssize_t n_read;
+	while ((n_read = recv(sock_fd, packet, size, 0)) < 0 );
+	return n_read;
+}
+
+// PixelVloed C version
+
+// application entry point
+int main(int argc, char* argv[])
+{
+  
+
+  char packet[1120];
+  ssize_t packet_size;
+
+  int sock_fd = get_udp_socket(UDP_PORT);
+  
+  // Init screen buffer
+  if (!init_frame_buffer()) {
+    die("Failed to init screen buffer.\n");
+  }
+
+  // draw...
+  int x, y;
+  uint8_t r, g, b, a;
+  int pixeloffset = 2;
+  int pixellength = 0;
+  
+
+  
+  while( (packet_size = get_udp_packet(sock_fd, packet, sizeof(packet))) >= 0 ) {
+    if((uint8_t)packet[0] == 1){
+      pixellength = 8;
+    } else {
+      pixellength = 7;
+    }
+
+    // how many pixels
+    //pixelcount = (packet_size-1)/pixellength;
+    //printf("%d pixels in packet of size: %d using a pixel size of: %d \n", pixelcount, packet_size, pixellength);
+    // fetch a pixel from the udp socket
+    int i = 0;
+    for(i=pixeloffset;  // skip pixeloffset
+        i<packet_size-(pixellength-1); // walk trough all bytes untill we get to the end minus one package length
+        i+=pixellength){
+	    x = (uint8_t)packet[i  ] + (((uint8_t)packet[i+1])<<8);
+	    y = (uint8_t)packet[i+2] + (((uint8_t)packet[i+3])<<8);
+	    r = packet[i+6];
+	    g = packet[i+5];
+	    b = packet[i+4];
+	    a = 0;
+      //printf("%d %d %d %d %d %d\n", x, y, packet[i  ], packet[i+1], packet[i+2], packet[i+3]);
+      // Write pixel to screen
+      write_pixel_to_screen(x, y, r, g, b, a);
+    }
+  }
+  
+  // De init screen buffer
+  deinit_frame_buffer();
+  
+  return 0; 
+}