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#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 || received < sizeof(inbuf))
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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