framer

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#include <stdlib.h>
#include <stdio.h>
#include <dlfcn.h>

#include "raylib.h"
#include "frames.h"

#define MONITOR_WIDTH  1366
#define MONITOR_HEIGHT 768

static void *libplug = NULL;
void (*plug_load_frames)(Frames *fs);

bool reload_libplug(char *libplug_path)
{
  if (libplug != NULL) dlclose(libplug);

  libplug = dlopen(libplug_path, RTLD_NOW);
  if (libplug == NULL) {
    TraceLog(LOG_ERROR, "HOTRELOAD: could not load %s: %s",
             libplug_path, dlerror());
    return false;
  }

  const char *symbol = "plug_load_frames";
  plug_load_frames = dlsym(libplug, symbol);
  if (plug_load_frames == NULL) {
    TraceLog(LOG_ERROR, "HOTRELOAD: could not find %s symbol in %s: %s",
             symbol, libplug_path, dlerror());
    return false;
  }

  return true;
}

int main(int argc, char **argv)
{
  char * program_name = nob_shift(argv, argc);

  if (argc == 0) {
    TraceLog(LOG_ERROR, "No libplug path provided");
    TraceLog(LOG_ERROR, "USAGE: %s <libplug.so>", program_name);
    return EXIT_FAILURE;
  }

  char *libplug_path = nob_shift(argv, argc);
  if (!reload_libplug(libplug_path)) return EXIT_FAILURE;

  int width  = 800;
  int height = 450;

  float monitor_scale = (float)MONITOR_WIDTH/(float)width;

  InitWindow(width, height, "\"introdução a assembly\" slides");
  SetTargetFPS(60);
  SetExitKey(KEY_Q);

  Frames fs = {0};
  frames_load(&fs, plug_load_frames);

  float scale = 1.0;
  bool was_g_last_pressed  = false;
  while (!WindowShouldClose()) {
    if (IsWindowFullscreen()) {
      scale = monitor_scale;
      SetWindowSize(MONITOR_WIDTH, MONITOR_HEIGHT);
    } else {
      scale = 1.0;
      SetWindowSize(width, height);
    }

    int pressed = GetCharPressed();
    switch (pressed) {
    case 0: break;
    case 'G':
      frames_last(&fs);
      was_g_last_pressed = false;
      break;
    case 'g':
      if (was_g_last_pressed) {
        frames_first(&fs);
        was_g_last_pressed = false;
      } else {
        was_g_last_pressed = true;
      }
      break;
    case 'F':
    case 'f':
      ToggleFullscreen();
      was_g_last_pressed = false;
      break;
    case 'J':
    case 'j':
    case ' ':
      frames_next(&fs);
      was_g_last_pressed = false;
      break;
    case 'K':
    case 'k':
      frames_prev(&fs);
      was_g_last_pressed = false;
      break;
    case 'r':
    case 'R':
      if (!reload_libplug(libplug_path)) return EXIT_FAILURE;
      frames_load(&fs, plug_load_frames);
      was_g_last_pressed = false;
      break;
    default:
      was_g_last_pressed = false;
    }

    frames_tick(&fs, GetFrameTime());
    frames_draw(&fs, scale);
  }

  CloseWindow();

  return EXIT_SUCCESS;
}