/**
* Capture the current image with the size as it is displayed and retrieve it as Bitmap.
*
* @return current output as Bitmap
* @throws InterruptedException
*/
public Bitmap capture() throws InterruptedException {
final Semaphore waiter = new Semaphore(0);
final int width = mGLSurfaceView.getMeasuredWidth();
final int height = mGLSurfaceView.getMeasuredHeight();
// Take picture on OpenGL thread
final int[] pixelMirroredArray = new int[width * height];
mGPUImage.runOnGLThread(
new Runnable() {
@Override
public void run() {
final IntBuffer pixelBuffer = IntBuffer.allocate(width * height);
GLES20.glReadPixels(
0, 0, width, height, GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, pixelBuffer);
int[] pixelArray = pixelBuffer.array();
// Convert upside down mirror-reversed image to right-side up normal image.
for (int i = 0; i < height; i++) {
for (int j = 0; j < width; j++) {
pixelMirroredArray[(height - i - 1) * width + j] = pixelArray[i * width + j];
}
}
waiter.release();
}
});
requestRender();
waiter.acquire();
Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
bitmap.copyPixelsFromBuffer(IntBuffer.wrap(pixelMirroredArray));
return bitmap;
}
