Extra2D/examples/image_display_demo/main.cpp

#include <cstdio>
#include <event/events.h>
#include <extra2d.h>
#include <renderer/rhi_module.h>

using namespace extra2d;

class ImageDisplayScene : public Scene {
public:
  void onEnter() override {
    Scene::onEnter();
    createCamera();
    createImageSprite();
    onRenderBeginListener_.bind([this]() { trySetupTexture(); });
  }

  void onExit() override {
    onRenderBeginListener_.reset();
    Scene::onExit();
  }

private:
  void trySetupTexture() {
    auto *rhiModule = RHIModule::get();
    if (!rhiModule || !rhiModule->getDevice()) {
      return;
    }
    auto assets = getAssets();
    if (!assets || !spriteRenderer_) {
      return;
    }
    auto texture = assets->load<Texture>("assets/test.png");
    if (texture.isValid()) {
      spriteRenderer_->setTexture(texture);
      onRenderBeginListener_.reset();
    }
  }
  void createCamera() {
    auto cameraNode = makePtr<Node>();
    cameraNode->setName("MainCamera");
    cameraNode->setPosition(0.0f, 0.0f);
    auto camera = makePtr<CameraComponent>();
    camera->setOrtho(1280.0f, 720.0f);
    cameraNode->addComponent(camera);
    setMainCamera(camera);
    addChild(cameraNode);
  }

  void createImageSprite() {
    auto spriteNode = makePtr<Node>();
    spriteNode->setName("ImageSprite");
    spriteNode->setPosition(640.0f, 360.0f);
    spriteNode->setAnchor(0.5f, 0.5f);
    spriteRenderer_ = makePtr<SpriteRenderer>();
    spriteNode->addComponent(spriteRenderer_);
    addChild(spriteNode);
  }
  Ptr<SpriteRenderer> spriteRenderer_;
  events::OnRenderBegin::Listener onRenderBeginListener_;
};

int main(int argc, char **argv) {
  auto app = Application::create();

  AppConfig config;
  config.title = "Image Display Demo - Extra2D";
  config.width = 1280;
  config.height = 720;

  if (!app->init(config)) {
    printf("应用程序初始化失败！\n");
    return -1;
  }

  auto director = app->getModule<SceneModule>()->getDirector();
  if (!director) {
    printf("获取导演器失败！\n");
    return -1;
  }
  director->runScene(makePtr<ImageDisplayScene>());
  app->run();
  return 0;
}