Merge pull request #5654 from dabingnn/develop_RenderTextureImprovement

Develop render texture improvement

cocos/2d/CCRenderTexture.cpp

@@ -413,34 +413,30 @@ void RenderTexture::visit(Renderer *renderer, const kmMat4 &parentTransform, boo
 
 bool RenderTexture::saveToFile(const std::string& filename)
 {
-    bool ret = false;
-
-    Image *image = newImage(true);
-    if (image)
-    {
-        ret = image->saveToFile(filename);
-    }
-
-    CC_SAFE_DELETE(image);
-    return ret;
+    return saveToFile(filename,Image::Format::JPG);
 }
 bool RenderTexture::saveToFile(const std::string& fileName, Image::Format format)
 {
-    bool ret = false;
     CCASSERT(format == Image::Format::JPG || format == Image::Format::PNG,
              "the image can only be saved as JPG or PNG format");
+    
+    std::string fullpath = FileUtils::getInstance()->getWritablePath() + fileName;
+    _saveToFileCommand.init(_globalZOrder);
+    _saveToFileCommand.func = CC_CALLBACK_0(RenderTexture::onSaveToFile,this,fullpath);
+    
+    Director::getInstance()->getRenderer()->addCommand(&_saveToFileCommand);
+    return true;
+}
 
+void RenderTexture::onSaveToFile(const std::string& filename)
+{
     Image *image = newImage(true);
     if (image)
     {
-        std::string fullpath = FileUtils::getInstance()->getWritablePath() + fileName;
-        
-        ret = image->saveToFile(fullpath.c_str(), true);
+        image->saveToFile(filename.c_str(), true);
     }
 
     CC_SAFE_DELETE(image);
-
-    return ret;
 }
 
 /* get buffer as Image */

cocos/2d/CCRenderTexture.h

@@ -214,6 +214,7 @@ protected:
     CustomCommand _clearCommand;
     CustomCommand _beginCommand;
     CustomCommand _endCommand;
+    CustomCommand _saveToFileCommand;
 protected:
     //renderer caches and callbacks
     void onBegin();
@@ -221,6 +222,8 @@ protected:
 
     void onClear();
     void onClearDepth();
+
+    void onSaveToFile(const std::string& fileName);
     
     kmMat4 _oldTransMatrix, _oldProjMatrix;
     kmMat4 _transformMatrix, _projectionMatrix;

samples/cpp-tests/Classes/RenderTextureTest/RenderTextureTest.cpp

@@ -145,12 +145,16 @@ void RenderTextureSave::saveImage(cocos2d::Ref *sender)
     _target->saveToFile(jpg, Image::Format::JPG);
     
     std::string fileName = FileUtils::getInstance()->getWritablePath() + jpg;
-    auto sprite = Sprite::create(fileName);
-
-    sprite->setScale(0.3f);
-    addChild(sprite);
-    sprite->setPosition(Point(40, 40));
-    sprite->setRotation(counter * 3);
+    auto action1 = DelayTime::create(1);
+    auto func = [&,fileName]()
+    {
+        auto sprite = Sprite::create(fileName);
+        addChild(sprite);
+        sprite->setScale(0.3f);
+        sprite->setPosition(Point(40, 40));
+        sprite->setRotation(counter * 3);
+    };
+    runAction(Sequence::create(action1, CallFunc::create(func), NULL));
 
     CCLOG("Image saved %s and %s", png, jpg);