From 32773a08eb11d286682ca8cad41171ce804f1631 Mon Sep 17 00:00:00 2001
From: erdgeist <erdgeist@erdgeist.org>
Date: Wed, 31 May 2023 15:39:59 +0200
Subject: Works

---
 main.c | 70 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100644 main.c

(limited to 'main.c')

diff --git a/main.c b/main.c
new file mode 100644
index 0000000..82b3c07
--- /dev/null
+++ b/main.c
@@ -0,0 +1,70 @@
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdio.h>
+
+#include "SDL2/SDL.h"
+#include "SDL2/SDL2_gfxPrimitives.h"
+
+int main() {
+    int sock_in = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+    struct sockaddr_in server_addr;
+
+    SDL_Window *screen;
+    SDL_Renderer *renderer;
+    int screen_width = 448;
+    //int screen_height = 236;
+    int screen_height = 160;
+    uint8_t inbuf[screen_width * screen_height / 8 + 10];
+
+    if (SDL_Init(SDL_INIT_EVERYTHING) == -1) {
+        fprintf(stderr, "Can't initialize SDL.\n");
+        exit(1);
+    }
+    screen = SDL_CreateWindow("Laserharfe", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, screen_width, screen_height, SDL_WINDOW_OPENGL);
+    if (!screen) {
+        fprintf(stderr, "Can't set video mode.\n");
+        exit(1);
+    }
+    renderer = SDL_CreateRenderer(screen, -1, 0);
+
+    SDL_RenderClear(renderer);
+
+    memset(&server_addr, 0, sizeof(server_addr));
+    server_addr.sin_family = AF_INET;
+    server_addr.sin_port = htons(2342);
+    server_addr.sin_addr.s_addr = inet_addr("192.168.178.69");
+
+    if (bind(sock_in, (struct sockaddr*)&server_addr, sizeof(server_addr)) < 0){
+        fprintf(stderr, "Couldn't bind to the port\n");
+        exit(1);
+    }
+
+    struct timeval tv;
+    memset(&tv, 0, sizeof(tv));
+    tv.tv_usec = 30000;
+    setsockopt(sock_in, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv));
+
+    while (1) {
+        SDL_Event ev;
+        SDL_PollEvent(&ev);
+        if (ev.type == SDL_QUIT) exit(0);
+
+        size_t received = recvfrom(sock_in, inbuf, sizeof(inbuf), 0, NULL, 0);
+        if (received == -1)
+            continue;
+
+        printf("Packet received, size: %zd\n", received);
+        SDL_RenderClear(renderer);
+
+        for (int row = 0; row < screen_height; ++row) {
+            for (int col = 0; col < screen_width; ++col) {
+                uint8_t pixel = inbuf[10 + (row * screen_width + col) / 8];
+                int on = pixel << (col & 7);
+                filledCircleColor(renderer, col, row, 1, (on & 0x80) ? 0xffffffff : 0);
+            }
+        }
+        SDL_RenderPresent(renderer);
+    }
+}
-- 
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