Question

我必须将位图图像转换为纹理格式。并需要显示它。为此，我编写了一个将位图转换为纹理的函数。但是在运行代码时，它会显示一个没有任何崩溃的空白图像。请帮助确定

在privew.java中，我在onCreate（）函数中为图像（内部资源文件夹）创建了一个位图对象。

//Creating a sample image's resource id for testing in GlRenderer
    drawableResourceId = this.getResources().getIdentifier("flower", "drawable", this.getPackageName());
    System.out.println("FLOWER ID "+drawableResourceId);
    InputStream is =this.getResources().openRawResource(drawableResourceId);
    Bitmap tBitmap;
    tBitmap = BitmapFactory.decodeStream(is, null, sBitmapOptions);
    ThisAppGlobals.texture_bitmap=tBitmap;

在GlRenderer.java（OpenGl的Renderer类）中使用了一个名为＆＃34; loadGLTextureFromBitmap（）＆＃34;的函数。为相应的位图对象创建纹理。我称之为openGl类的onSurfaceCreated（）函数。

  // setup texture //
       int mTextureID
       System.out.println("Calling loadGLTextureFromBitmap");
       mTextureID = loadGLTextureFromBitmap(ThisAppGlobals.texture_bitmap, gl );
       System.out.println("Called loadGLTextureFromBitmap"+  mTextureID);

功能是，

    private int loadGLTextureFromBitmap(Bitmap sideBysideImg, GL10 gl) {
    // TODO Auto-generated method stub


    // Generate one texture pointer
    int[] textureIds = new int[1];
    gl.glGenTextures( 1, textureIds, 0 );

    // bind this texture
    gl.glBindTexture( GLES20.GL_TEXTURE_2D, textureIds[0] );

    // Create Nearest Filtered Texture
    gl.glTexParameterf( GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_LINEAR );
    gl.glTexParameterf( GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_LINEAR );

    gl.glTexParameterf( GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_S, GLES20.GL_REPEAT );
    gl.glTexParameterf( GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_T, GLES20.GL_REPEAT );

    // Use the Android GLUtils to specify a two-dimensional texture image from our bitmap
    GLUtils.texImage2D( GLES20.GL_TEXTURE_2D, 0,sideBysideImg, 0 );
    return textureIds[0];


}

onSurfaceChanged（）包含

GLES20.glBindTexture(GL_TEXTURE_EXTERNAL_OES, mTextureID);
       checkGlError("glBindTexture mTextureID");

       GLES20.glTexParameterf(GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_MIN_FILTER,
                           GLES20.GL_NEAREST);
       GLES20.glTexParameterf(GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_MAG_FILTER,
                           GLES20.GL_LINEAR);

       /*
        * Create the SurfaceTexture that will feed this textureID,
        * and pass it to the MediaPlayer
        */
       mSurface = new SurfaceTexture(mTextureID);
       mSurface.setOnFrameAvailableListener(this);

     Surface surface = new Surface(mSurface);
             surface.release();

位图到纹理

0 个答案: