Android opengl 1.1 渲染到纹理 1286 错误（无效的帧缓冲区操作）

Question

我正在尝试在我的 Android 游戏中实现运动模糊效果。

经过大量研究后，我发现最好的方法是使用帧缓冲区对象将前一帧保存为纹理，并将其渲染在当前帧的顶部。所以看到一些不错的教程< /a> 关于如何做类似的事情，我最终得到了这段代码，它基本上**在纹理上渲染我的场景，然后将纹理绘制到默认的帧缓冲区。

它只绘制白色纹理**，并在 gl.glGetError() 中出现 1286（无效帧缓冲区操作）错误

已解决：问题似乎是两个纹理尺寸的非幂，正如 Jean 所说

int[] fb, depthRb, renderTex; 
int texW = 480 * 2; 
int texH = 800 * 2; 
IntBuffer texBuffer;
int[] buf = new int[texW * texH];
GL11ExtensionPack gl11ep ;
void setup(GL10 gl)
{
    gl11ep=(GL11ExtensionPack)gl;           

    fb = new int[1];
    depthRb = new int[1];
    renderTex = new int[1];

    gl11ep.glGenFramebuffersOES(1, fb, 0);
    gl11ep.glGenRenderbuffersOES(1, depthRb, 0); // the depth buffer

    gl.glGenTextures(1, renderTex, 0);// generate texture
    gl.glBindTexture(GL10.GL_TEXTURE_2D, renderTex[0]);

    gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MIN_FILTER, GL10.GL_NEAREST);
    gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MAG_FILTER, GL10.GL_LINEAR);
    gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_S, GL10.GL_REPEAT);
    gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_T, GL10.GL_REPEAT);

    texBuffer = ByteBuffer.allocateDirect(buf.length*4).order(ByteOrder.nativeOrder()).asIntBuffer();

    gl.glTexImage2D(GL10.GL_TEXTURE_2D, 0, GL10.GL_RGB, texW, texH, 0, GL10.GL_RGB, GL10.GL_UNSIGNED_SHORT_5_6_5, texBuffer);


    gl11ep.glBindRenderbufferOES(GL11ExtensionPack.GL_RENDERBUFFER_OES, depthRb[0]);
    gl11ep.glRenderbufferStorageOES(GL11ExtensionPack.GL_RENDERBUFFER_OES, GL11ExtensionPack.GL_DEPTH_COMPONENT16, texW, texH);

}

boolean RenderStart(GL10 gl)
{
    // Bind the framebuffer
    gl11ep.glBindFramebufferOES(GL11ExtensionPack.GL_FRAMEBUFFER_OES, fb[0]);
    // specify texture as color attachment
    gl11ep.glFramebufferTexture2DOES(GL11ExtensionPack.GL_FRAMEBUFFER_OES, GL11ExtensionPack.GL_COLOR_ATTACHMENT0_OES, GL10.GL_TEXTURE_2D, renderTex[0], 0);
    // attach render buffer as depth buffer
    gl11ep.glFramebufferRenderbufferOES(GL11ExtensionPack.GL_FRAMEBUFFER_OES, GL11ExtensionPack.GL_DEPTH_ATTACHMENT_OES, GL11ExtensionPack.GL_RENDERBUFFER_OES, depthRb[0]);

    int error = gl.glGetError();
    if (error != GL10.GL_NO_ERROR) {
                  Tools.con("Background Load GLError: " + error) ;//here the 1286 error
    }

    int status = gl11ep.glCheckFramebufferStatusOES(GL11ExtensionPack.GL_FRAMEBUFFER_OES);
    if (status != GL11ExtensionPack.GL_FRAMEBUFFER_COMPLETE_OES)//here always geting true
    {
        return false;
    }

    return true;
}

void RenderEnd(GL10 gl)
{
    gl11ep.glBindFramebufferOES(GL11ExtensionPack.GL_FRAMEBUFFER_OES, 0);
    gl.glClearColor(0f, 0f, 0f, 1.0f);
    gl.glClear( gl.GL_DEPTH_BUFFER_BIT | gl.GL_COLOR_BUFFER_BIT);
    gl.glEnable(GL10.GL_TEXTURE_2D);
    gl.glBindTexture(GL10.GL_TEXTURE_2D, renderTex[0]);
    gl.glColor4f(1,1,1,1);
    ((GL11Ext) gl).glDrawTexfOES(0, 0, 0,800, 480);
    gl.glDisable(GL10.GL_TEXTURE_2D);

}


public void onDrawFrame(GL10 gl)
    {

    this.RenderStart(gl);
    render(gl);//render scene
    this.RenderEnd(gl);
    }

public void onSurfaceCreated(GL10 gl, EGLConfig config)
    {
       ...
       setup(gl);
    }

Answer 1

也许您应该使纹理的高度和宽度均为 2 的幂（即 512x512，甚至更小，因为它仅用于模糊效果）。几乎所有具有硬件加速功能的设备都需要它。测试此功能的快速方法是将其运行到模拟器中（仅作为软件，如果它支持代码中所需的所有其他功能，则它应该可以工作）