[ Android ] Opengl es 2.0 다시 그리기

ByteBuffer pixelBuffer;


void storePixels() {

  try {

    GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, fbuf);

    pixelBuffer = ByteBuffer.allocateDirect(width * height * 4).order(ByteOrder.nativeOrder());

    GLES20.glReadPixels(0, 0, width, height, GL20.GL_RGBA, GL20.GL_UNSIGNED_BYTE, pixelBuffer);

    GLES20.glBindFrameBuffer(GLES20.GL_FRAMEBUFFER, 0);

    gfx.checkGlError("store Pixels");

  }catch (OutOfMemoryError e) {

    pixelBuffer = null;

  }

}


void redrawPixels() {

  GLES20.glBindFramebuffer(GL20.GL_FRAMEBUFFER, fbuf);

  int[] texId = new int[1];

  GLES20.glGenTextures(1, texId, 0);

  int bufferTex = texId[0];

  GLES20.glBindTexture(GL20.GL_TEXTURE_2D, bufferTex);

  GLES20.glTexParameterf(GL20.GL_TEXTURE_2D, GL20.GL_TEXTURE_MAG_FILTER, GL20.GL_LINEAR);

  GLES20.glTexParameterf(GL20.GL_TEXTURE_2D, GL20.GL_TEXTURE_MIN_FILTER, GL20.GL_LINEAR);

  GLES20.glTexParameterf(GL20.GL_TEXTURE_2D, GL20.GL_TEXTURE_WRAP_S, repeatX ? GL20.GL_REPEAT

    : GL20.GL_CLAMP_TO_EDGE);

  GLES20.glTexParameterf(GL20.GL_TEXTURE_2D, GL20.GL_TEXTURE_WRAP_T, repeatY ? GL20.GL_REPEAT

    : GL20.GL_CLAMP_TO_EDGE);

  GLES20.glTexImage2D(GL20.GL_TEXTURE_2D, 0, GL20.GL_RGBA, width, height, 0, GL20.GL_RGBA, GL20.GL_UNSIGNED_BYTE, pixelBuffer);

  gfx.drawTexture(bufferTex, width, height, Transform.IDENTITY, width/2, height/2, false, false, 1);

  GLES20.glDeleteTextures(1, IntBuffer.wrap(new int[] {bufferTex}));

  pixelBuffer = null;

  GLES20.glBindFrameBuffer(GLES20.GL_FRAMEBUFFER, 0);

}

출처 : http://stackoverflow.com/questions/7208255/android-opengl-es-2-0-glreadpixels-and-glteximage2d-drawing-a-black-textur
 
우선 확인은 못해봤는데요.

저장해 두면 유용하게 쓸 듯해서... ㅋㅋ