[Cocos2d]How to Create bitmap from GlSurfaceView

Question

How can I take screen shot of Glsurfaceview in Cocos2d. I tried with following code using GLsurfaceView

    GlsurfaceView glv=CCDirector.sharedDirector().getOpenGLView();
    glv.setDrawingCacheEnabled(true);
    Bitmap bitmap=glv.getDrawingCache();

but it return transparent image.

Answer 1

I got answer from this anddev forum question I attached code along with this hope somebody will find this helpful

Please Put this code inside renderer class onDraw Method inside starting.

public static Bitmap SavePixels(int x, int y, int w, int h, GL10 gl)
{  
    int b[]=new int[w*h];
    int bt[]=new int[w*h];
    IntBuffer ib=IntBuffer.wrap(b);
    ib.position(0);
    gl.glReadPixels(x, y, w, h, GL10.GL_RGBA, GL10.GL_UNSIGNED_BYTE, ib);

    /*  remember, that OpenGL bitmap is incompatible with 
        Android bitmap and so, some correction need.
     */   
    for(int i=0; i<h; i++)
    {         
        for(int j=0; j<w; j++)
        {
            int pix=b[i*w+j];
            int pb=(pix>>16)&0xff;
            int pr=(pix<<16)&0x00ff0000;
            int pix1=(pix&0xff00ff00) | pr | pb;
            bt[(h-i-1)*w+j]=pix1;
        }
    }              
    Bitmap sb=Bitmap.createBitmap(bt, w, h, true);
    return sb;
}

public static void SavePNG(int x, int y, int w, int h, String name, GL10 gl)
{
    Bitmap bmp=SavePixels(x,y,w,h,gl);
    try
    {
        FileOutputStream fos=new FileOutputStream("/sdcard/my_app/"+name);
        bmp.compress(CompressFormat.PNG, 100, fos);
        try
        {
            fos.flush();
        }
        catch (IOException e)
        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        try
        {
            fos.close();
        }
        catch (IOException e)
        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
    catch (FileNotFoundException e)
    {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }              
}