Cocos2d-x3.1及3.2实现截屏功能

• 1、Cocos2d-x3.1

  在Cocos2d-x3.2之前，Cocos引擎没有提供截图功能，但是可以通过RenderTexture实现，
• 原文链接：http://www.it165.net/pro/html/201409/21451.html
  

  1.1首先在CCDirector.h中添加如下代码：并在其中添加头文件 #include "2d/CCRenderTexture.h"

  view source print ?

  1. voidsaveScreenshot(conststd::string& fileName,std::function<(std::string&)>& callback);

  1.2然后在CCDirector.cpp中添加如下代码：

  01. Director::saveScreenshot(std::string &fileName,宋体; background:none">std::string &)> &callback)
  02. {
  03. Image::Format format;
  04. //进行后缀判断
  05. if(std::string::npos != fileName.find_last_of(".")){
  06. auto extension = fileName.substr(fileName.find_last_of(),fileName.length());
  07. (!extension.compare(".png")) {
  08. format = Image::Format::PNG;
  09. }else".jpg"10. format = Image::Format::JPG;
  11. else{
  12. log("cocos2d: the image can only be saved as JPG or PNG format");
  13. return;
  14. }
  15. 16. 17. 18. 19. //获取屏幕尺寸，初始化一个空的渲染纹理对象
  20. auto renderTexture = RenderTexture::create(getWinSize().width,getWinSize().height,Texture2D::PixelFormat::RGBA8888);
  21. //清空并开始获取
  22. renderTexture->beginWithClear(0.0f,.0f);
  23. //遍历场景节点对象，填充纹理到RenderTexture中
  24. getRunningScene()->visit();
  25. //结束获取
  26. renderTexture->end();
  27. //保存文件
  28. renderTexture->saveToFile(fileName,format);
  29. //使用schedule在下一帧中调用callback函数
  30. auto fullPath = FileUtils::getInstance()->getWritablePath() + fileName;
  31. auto scheduleCallback = [&,fullPath,callback](floatdt){
  32. callback(fullPath);
  33. };
  34. auto _schedule = getRunningScene()->getScheduler();
  35. _schedule->schedule(scheduleCallback,宋体; background:none">this,宋体; background:none">false"screenshot");
  36.
  37. }