#include #include #include #include #include #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); } }