Extra2D/examples/hello_world/main.cpp

#include <extra2d.h>
#include <cstdint>
#include <fstream>
#include <cstdio>
#include <string>
#include <vector>

using namespace extra2d;

static bool writeTestWav(const std::string &path) {
  const int sampleRate = 22050;
  const int channels = 1;
  const int bitsPerSample = 16;
  const int durationMs = 250;
  const int sampleCount = sampleRate * durationMs / 1000;
  const int byteRate = sampleRate * channels * bitsPerSample / 8;
  const int blockAlign = channels * bitsPerSample / 8;
  const int dataSize = sampleCount * blockAlign;
  const int riffSize = 36 + dataSize;

  std::ofstream file(path, std::ios::binary);
  if (!file.is_open()) {
    return false;
  }

  file.write("RIFF", 4);
  file.write(reinterpret_cast<const char *>(&riffSize), 4);
  file.write("WAVE", 4);
  file.write("fmt ", 4);
  const int fmtChunkSize = 16;
  const short audioFormat = 1;
  const short numChannels = static_cast<short>(channels);
  const short bps = static_cast<short>(bitsPerSample);
  file.write(reinterpret_cast<const char *>(&fmtChunkSize), 4);
  file.write(reinterpret_cast<const char *>(&audioFormat), 2);
  file.write(reinterpret_cast<const char *>(&numChannels), 2);
  file.write(reinterpret_cast<const char *>(&sampleRate), 4);
  file.write(reinterpret_cast<const char *>(&byteRate), 4);
  const short ba = static_cast<short>(blockAlign);
  file.write(reinterpret_cast<const char *>(&ba), 2);
  file.write(reinterpret_cast<const char *>(&bps), 2);
  file.write("data", 4);
  file.write(reinterpret_cast<const char *>(&dataSize), 4);

  std::vector<int16_t> samples(static_cast<size_t>(sampleCount), 0);
  file.write(reinterpret_cast<const char *>(samples.data()), dataSize);
  return file.good();
}

int main(int argc, char **argv) {
  // 创建应用（自动创建窗口）
  auto app = Application::create();
  
  AppConfig config;
  config.title = "Hello World";
  config.width = 1280;
  config.height = 720;
  
  if (!app->init(config)) {
    printf("初始化失败！\n");
    return -1;
  }

  printf("窗口: %dx%d\n", app->getWindowWidth(), app->getWindowHeight());

  AssetsModule *assets = getAssets();
  if (assets) {
    Handle<Font> font = assets->load<Font>("assets/font.ttf");
    if (font.isValid()) {
      Font *fontPtr = assets->get(font);
      float lineHeight = fontPtr ? fontPtr->lineHeight(32.0f) : 0.0f;
      printf("字体加载成功，32px 行高: %.2f\n", lineHeight);
    } else {
      printf("字体加载失败\n");
    }

    const std::string testMusicPath = "assets/generated_test.wav";
    if (writeTestWav(testMusicPath)) {
      Handle<Music> music = assets->load<Music>(testMusicPath);
      if (music.isValid()) {
        printf("音乐加载成功: %s\n", testMusicPath.c_str());
      } else {
        printf("音乐加载失败: %s\n", testMusicPath.c_str());
      }
    } else {
      printf("测试音频文件生成失败\n");
    }
  }
  
  // 运行应用
  app->run();
  
  // 自动销毁
  return 0;
}