Android Opengl ES:GLUtils.glTexImage2D导致GL_INVALID_ENUM

Question

我正在尝试使用Android 2.2渲染一个简单的纹理四边形GLSurfaceView.我正在加载一个BMP图像(128x128)BitmapFactory.decodeResource()- 这似乎工作.但每当我尝试将这个位图放入OpenGL纹理时,GLUtils.glTexImage2D我会得到一个OpenGL错误:glGetError()返回1280 , GL_INVALID_ENUM. 我究竟做错了什么？这是我的渲染器的代码:

public class MyRenderer implements GLSurfaceView.Renderer {
    Context context;
    int texId;

    public MyRenderer(Context c) {
        this.context = c;
    }

    @Override
    public void onSurfaceCreated(GL10 gl, EGLConfig config) {
        gl.glEnable(GL10.GL_TEXTURE_2D);
        this.texId = loadTexture(gl);       
    }

    int loadTexture(GL10 gl) {      
        int[] tmp = new int[1];
        gl.glGenTextures(1, tmp, 0);
        int id = tmp[0];

        Bitmap bmp = BitmapFactory.decodeResource(this.context.getResources(), R.drawable.myimage);
        gl.glGetError();
        GLUtils.texImage2D(id, 0, bmp, 0);
        int err = gl.glGetError();
        if (err != 0) {
            // err == 1280, prints "invalid enum":
            System.err.println(GLU.gluErrorString(err));
        }

        return id;
    }

    @Override
    public void onSurfaceChanged(GL10 gl, int width, int height) {      
        gl.glViewport(0, 0, width, height);
        gl.glMatrixMode(GL10.GL_PROJECTION);
        gl.glLoadIdentity();
        GLU.gluOrtho2D(gl, 0, width, height, 0);
        gl.glMatrixMode(GL10.GL_MODELVIEW);
        gl.glLoadIdentity();            
    }

    @Override
    public void onDrawFrame(GL10 gl) {
       // ...
    }
}

Answer 1

它可能应该是这样的:

gl.glBindTexture(GL10.GL_TEXTURE_2D, id);
GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, bmp, 0);