opengles2截屏

Question

我正在尝试捕获屏幕上渲染内容的屏幕截图。我尝试过使用glreadpixels但结果都是零。我很高兴知道是否还有其他方法可以捕获glsurfaceview。非常感谢！

以下是我从另一个帖子获得的代码片段：

public Bitmap savePixels(int x, int y, int w, int h){
        int b[]=new int[w*(y+h)];
        int bt[]=new int[w*h];
        IntBuffer ib=IntBuffer.wrap(b);
        ib.position(0);

        GLES20.glReadPixels(x, 0, w, y+h, GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, ib);

        for(int i=0, k=0; i<h; i++, k++)
        {//remember, that OpenGL bitmap is incompatible with Android bitmap
        //and so, some correction need.        
                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-k-1)*w+j]=pix1;

                    int test = pix;
                    if (pix > 0)    
                        System.out.println(test%256 + " " + (test/256)%256 + " " + (test/256/256)%256 + " " + test/256/256/256);
                }
        }
        return Bitmap.createBitmap(bt, w, h, Bitmap.Config.ARGB_8888);
}