CCRenderTexture rotated 180 degrees after resume(like bug #608)

cocos2d-x C++
#1

i’m porting a game from MS DirectX.
using CCRenderTexture was good, but found a bug similar bug #608

I’m using “cocos2d-2.0-rc0a-x-2.0-358-g26b7ba2”, but similar problemd occured;
attched file is my problem occurred at test/tests/RenderTextureTest.cpp
(screenshot by GalaxyTab Android 3.1)

Reproduece steps:

  1. excute tests/tests sample, and select RenderTextureTest
  2. draw any text using your finger like “A” (Top menu string is “Touch the screen…”)
  3. press Home key( or tap power key ), then wake-up.
  4. drawn text is rotated 180 degrees!
  5. again press Home key( or tap power key ), then wake-up.
  6. drawn text disappeared!

thanks.


before_after.JPG (445.9 KB)

#2

Hi,

actually the text is not rotated, but flipped.

I had the same problem with cocos2d-1.0.1-x-0.12.0 and fixed it by changing some code in CCRenderTexture.cpp:

In bool CCRenderTexture::getUIImageFromBuffer(CCImage *pImage, int x, int y, int nWidth, int nHeight), at line ~351, search for the following code:

        // to get the actual texture data 
        // #640 the image read from rendertexture is upseted
        for (int i = 0; i < nSavedBufferHeight; ++i)
        {
            memcpy(&pBuffer[i * nSavedBufferWidth * 4], 
                &pTempData[(y + nSavedBufferHeight - i - 1) * nReadBufferWidth * 4 + x * 4],
                nSavedBufferWidth * 4);
        }

and change it to:

        // to get the actual texture data 
        // #640 the image read from rendertexture is upseted
        for (int i = 0; i < nSavedBufferHeight; ++i)
        {
            memcpy(&pBuffer[i * nSavedBufferWidth * 4], 
                &pTempData[(y + i) * nReadBufferWidth * 4 + x * 4], 
                nSavedBufferWidth * 4);
        }

Can somebody of the cocos2d-x team officially prove that this was a real bug and my suggestion would be a proper fix, please? Thanks!

#3

Hi.
I have the same problem. I use cocos2d-2.0-rc2-x-2.0.1.
Thank you for sharing youre solution, but if press Home key second time and wakeup - texture is missing.

I hope cocos2d-x team will soon complete their holidays and at last fixed a all known bugs

#4

Serg Merg wrote:

Hi.
I have the same problem. I use cocos2d-2.0-rc2-x-2.0.1.
Thank you for sharing youre solution, but if press Home key second time and wakeup - texture is missing.
>
I hope cocos2d-x team will soon complete their holidays and at last fixed a all known bugs

it seems that cocos2d-x team have no plan to fix CCRenderTexture bugs.
finally, i abandoned it.
instead of using CCRenderTexture, i used plain CCSprite.
i made a new CCSprite every frame, but got 29 fps in android.

that’s enough.

#5

I think they did and still do a great job here - but I also think they do just too much at once.

XNA, HTML5 and two cocos2d-x branches with several supported platforms PLUS I really wish they can, but I doubt that everybody in the team is able to make a living of the cocos2d-x donations only - so they probably have to work on other (paid) projects, too.