的OpenGL ES API没有当前上下文 [英] opengl es api with no current context

问题描述

我已经通过解决方案看，并没有真正找到了一个。我收到此错误，因为它似乎是在执行发生在GL线程之外。但是我不知道如何解决这个问题。在code是如下：

I have looked through the solutions and haven't really found one. I am getting this error because it seems like the execution happens outside of the gl thread. However I am not sure how to fix this. The code is as follows:

public shape()
{
    super();        



    vertexShader = Shader.loadShader(GLES20.GL_VERTEX_SHADER, vertexShaderCode); //<============
    fragmentShader = Shader.loadShader(GLES20.GL_FRAGMENT_SHADER, fragmentShaderCode);      

    ByteBuffer buffer = ByteBuffer.allocateDirect(getCoordinates().length * 4);
    buffer.order(ByteOrder.nativeOrder());
    vertexBuffer = buffer.asFloatBuffer();

    vertexBuffer.put(getCoordinates());
    vertexBuffer.position(0);

    ByteBuffer drawListBuffer = ByteBuffer.allocateDirect(getOrderOfDraw().length * 2);

    drawListBuffer.order(ByteOrder.nativeOrder());

    listBuffer = drawListBuffer.asShortBuffer();
    listBuffer.put(getOrderOfDraw());

    listBuffer.position(0);


     mProgram = GLES20.glCreateProgram();             // create empty OpenGL Program
     GLES20.glAttachShader(mProgram, vertexShader);   // add the vertex shader to program
     GLES20.glAttachShader(mProgram, fragmentShader); // add the fragment shader to program
     GLES20.glLinkProgram(mProgram); 

}

和呼叫渲染器

    Square square = new Square(5, 5);

public void onDrawFrame(GL10 unused) 
{

    unused.glLoadIdentity();
    unused.glClear(GLES20.GL_COLOR_BUFFER_BIT);
    square.Draw();
}

广场的形状延伸

Square extends from shape

推荐答案

如果是新广场（5,5）; 不是任何OpenGL的回调的一部分（我假设你使用的是glSurfaceView），那么我不认为它运行在OpenGL的线程上。创建您的glSurfaceView时，它会被执行，我相信这是主要的机器人线程。

If that new Square(5,5); is not part of any of the opengl callbacks (I assume you're using a glSurfaceView), then I don't think it runs on the OpenGL thread. It will be executed when your glSurfaceView is created, which I believe is on the main android thread.

尝试移动新广场（5,5）; 里面的 onSurfaceCreated

这篇关于的OpenGL ES API没有当前上下文的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！