Java Code Examples for android.opengl.GLES20#glReadPixels()

@WorkerThread
protected void handleDraw() {
	if (DEBUG && ((++drawCnt % 100) == 0)) Log.v(TAG, "handleDraw:" + drawCnt);
	mEglTask.removeRequest(REQUEST_DRAW);
	try {
		mEglTask.makeCurrent();
		mInputTexture.updateTexImage();
		mInputTexture.getTransformMatrix(mTexMatrix);
	} catch (final Exception e) {
		Log.e(TAG, "handleDraw:thread id =" + Thread.currentThread().getId(), e);
		return;
	}
	// OESテクスチャをオフスクリーン(マスターサーフェース)へ描画
	mDrawer.draw(mTexId, mTexMatrix, 0);
	// オフスクリーンから読み取り
	mWorkBuffer.clear();
	GLES20.glReadPixels(0, 0,
		mImageWidth, mImageHeight,
		GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, mWorkBuffer);
	// Bitmapへ代入
	mWorkBuffer.clear();
	synchronized (mBitmap) {
		mBitmap.copyPixelsFromBuffer(mWorkBuffer);
	}
	invalidateSelf();
}
 

public static void sendImage(int width, int height, Context context, FileUtils.FileSavedCallback fileSavedCallback) {
    final IntBuffer pixelBuffer = IntBuffer.allocate(width * height);

    //about 20-50ms
    long start = System.nanoTime();
    GLES20.glReadPixels(0, 0, width, height, GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE,
            pixelBuffer);
    long end = System.nanoTime();

    Log.d(TAG, "glReadPixels time: " + (end - start)/1000000+" ms");

    //about 700-4000ms(png) 200-1000ms(jpeg)
    //use jpeg instead of png to save time
    //it will consume large memory and may take a long time, depends on the phone
    new SaveBitmapTask(pixelBuffer,width,height,context,fileSavedCallback).execute();
}
 

public Bitmap capture(int width, int height) {
    mPipeline.onSurfaceChanged(null, width, height);
    mPipeline.startRender();
    mPipeline.onDrawFrame(null);

    int[] iat = new int[mWidth * mHeight];
    IntBuffer ib = IntBuffer.allocate(width * height);
    GLES20.glReadPixels(0, 0, width, height, GL_RGBA, GL_UNSIGNED_BYTE, ib);

    int[] ia = ib.array();
    for (int i = 0; i < mHeight; i++) {
        System.arraycopy(ia, i * mWidth, iat, (mHeight - i - 1) * mWidth, mWidth);
    }
    Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    bitmap.copyPixelsFromBuffer(IntBuffer.wrap(iat));

    mPipeline.onSurfaceDestroyed();

    // 释放EGL环境
    mInputSurface.release();
    mEgl.release();
    return bitmap;
}
 

public static void sendImage(int width, int height, Context context, FileUtils.FileSavedCallback fileSavedCallback) {
    final IntBuffer pixelBuffer = IntBuffer.allocate(width * height);

    //about 20-50ms
    long start = System.nanoTime();
    GLES20.glReadPixels(0, 0, width, height, GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE,
            pixelBuffer);
    long end = System.nanoTime();

    Log.d(TAG, "glReadPixels time: " + (end - start)/1000000+" ms");

    //about 700-4000ms(png) 200-1000ms(jpeg)
    //use jpeg instead of png to save time
    //it will consume large memory and may take a long time, depends on the phone
    new SaveBitmapTask(pixelBuffer,width,height,context,fileSavedCallback).execute();
}
 

public static Bitmap getScreenShot(int width, int height){
    IntBuffer pixelBuffer = IntBuffer.allocate(width * height);
    GLES20.glReadPixels(0, 0, width, height, GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE,
            pixelBuffer);
    int[] pixelMirroredArray = new int[width * height];
    int[] pixelArray = pixelBuffer.array();
    for (int i = 0; i < height; i++) {
        for (int j = 0; j < width; j++) {
            pixelMirroredArray[(height - i - 1) * width + j] = pixelArray[i * width + j];
        }
    }
    Bitmap bmp = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    return bmp;
}
 

public static Bitmap getScreenShot(int width, int height){
    IntBuffer pixelBuffer = IntBuffer.allocate(width * height);
    GLES20.glReadPixels(0, 0, width, height, GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE,
            pixelBuffer);
    int[] pixelMirroredArray = new int[width * height];
    int[] pixelArray = pixelBuffer.array();
    for (int i = 0; i < height; i++) {
        for (int j = 0; j < width; j++) {
            pixelMirroredArray[(height - i - 1) * width + j] = pixelArray[i * width + j];
        }
    }
    Bitmap bmp = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    return bmp;
}
 

private static Bitmap grab(final int pGrabX, final int pGrabY, final int pGrabWidth, final int pGrabHeight) {
	final int[] source = new int[pGrabWidth * (pGrabY + pGrabHeight)];
	final IntBuffer sourceBuffer = IntBuffer.wrap(source);
	sourceBuffer.position(0);

	// TODO Check availability of OpenGL and GLES20.GL_RGBA combinations that require less conversion operations.
	// Note: There is (said to be) a bug with glReadPixels when 'y != 0', so we simply read starting from 'y == 0'.
	// TODO Does that bug still exist?
	GLES20.glReadPixels(pGrabX, 0, pGrabWidth, pGrabY + pGrabHeight, GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, sourceBuffer);

	final int[] pixels = new int[pGrabWidth * pGrabHeight];

	// Convert from RGBA_8888 (Which is actually ABGR as the whole buffer seems to be inverted) --> ARGB_8888
	for (int y = 0; y < pGrabHeight; y++) {
		for (int x = 0; x < pGrabWidth; x++) {
			final int pixel = source[x + ((pGrabY + y) * pGrabWidth)];

			final int blue = (pixel & 0x00FF0000) >> 16;
			final int red = (pixel  & 0x000000FF) << 16;
			final int greenAlpha = pixel & 0xFF00FF00;

			pixels[x + ((pGrabHeight - y - 1) * pGrabWidth)] = greenAlpha | red | blue;
		}
	}

	return Bitmap.createBitmap(pixels, pGrabWidth, pGrabHeight, Config.ARGB_8888);
}
 

/**
 * Saves the current frame to disk as a PNG image.
 */
public void saveFrame(String filename) throws IOException {
    // glReadPixels gives us a ByteBuffer filled with what is essentially big-endian RGBA
    // data (i.e. a byte of red, followed by a byte of green...).  To use the Bitmap
    // constructor that takes an int[] array with pixel data, we need an int[] filled
    // with little-endian ARGB data.
    //
    // If we implement this as a series of buf.get() calls, we can spend 2.5 seconds just
    // copying data around for a 720p frame.  It's better to do a bulk get() and then
    // rearrange the data in memory.  (For comparison, the PNG compress takes about 500ms
    // for a trivial frame.)
    //
    // So... we set the ByteBuffer to little-endian, which should turn the bulk IntBuffer
    // get() into a straight memcpy on most Android devices.  Our ints will hold ABGR data.
    // Swapping B and R gives us ARGB.  We need about 30ms for the bulk get(), and another
    // 270ms for the color swap.
    //
    // We can avoid the costly B/R swap here if we do it in the fragment shader (see
    // http://stackoverflow.com/questions/21634450/ ).
    //
    // Having said all that... it turns out that the Bitmap#copyPixelsFromBuffer()
    // method wants RGBA pixels, not ARGB, so if we create an empty bitmap and then
    // copy pixel data in we can avoid the swap issue entirely, and just copy straight
    // into the Bitmap from the ByteBuffer.
    //
    // Making this even more interesting is the upside-down nature of GL, which means
    // our output will look upside-down relative to what appears on screen if the
    // typical GL conventions are used.  (For ExtractMpegFrameTest, we avoid the issue
    // by inverting the frame when we render it.)
    //
    // Allocating large buffers is expensive, so we really want mPixelBuf to be
    // allocated ahead of time if possible.  We still get some allocations from the
    // Bitmap / PNG creation.

    mPixelBuf.rewind();
    GLES20.glReadPixels(0, 0, mWidth, mHeight, GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE,
        mPixelBuf);

    BufferedOutputStream bos = null;
    try {
        bos = new BufferedOutputStream(new FileOutputStream(filename));
        Bitmap bmp = Bitmap.createBitmap(mWidth, mHeight, Bitmap.Config.ARGB_8888);
        mPixelBuf.rewind();
        bmp.copyPixelsFromBuffer(mPixelBuf);
        bmp.compress(Bitmap.CompressFormat.PNG, 90, bos);
        bmp.recycle();
    } finally {
        if (bos != null) bos.close();
    }
    if (VERBOSE) {
        Log.d(TAG, "Saved " + mWidth + "x" + mHeight + " frame as '" + filename + "'");
    }
}
 

public ByteBuffer getFrame() {
    mPixelBuf.rewind();
    GLES20.glReadPixels(0, 0, mWidth, mHeight, GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, mPixelBuf);
    return mPixelBuf;
}
 

public ByteBuffer getFrame() {
    mPixelBuf.rewind();
    GLES20.glReadPixels(0, 0, mWidth, mHeight, GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, mPixelBuf);
    return mPixelBuf;
}
 

public ByteBuffer getFrame() {
    mPixelBuf.rewind();
    GLES20.glReadPixels(0, 0, mWidth, mHeight, GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, mPixelBuf);
    return mPixelBuf;
}
 

private void notifyCallbacks(
    VideoRenderer.I420Frame frame, int[] yuvTextures, float[] texMatrix, boolean wasRendered) {
  if (frameListeners.isEmpty())
    return;

  final float[] bitmapMatrix = RendererCommon.multiplyMatrices(
      RendererCommon.multiplyMatrices(texMatrix,
          mirror ? RendererCommon.horizontalFlipMatrix() : RendererCommon.identityMatrix()),
      RendererCommon.verticalFlipMatrix());

  Iterator<FrameListenerAndParams> it = frameListeners.iterator();
  while (it.hasNext()) {
    FrameListenerAndParams listenerAndParams = it.next();
    if (!wasRendered && listenerAndParams.applyFpsReduction) {
      continue;
    }
    it.remove();

    final int scaledWidth = (int) (listenerAndParams.scale * frame.rotatedWidth());
    final int scaledHeight = (int) (listenerAndParams.scale * frame.rotatedHeight());

    if (scaledWidth == 0 || scaledHeight == 0) {
      listenerAndParams.listener.onFrame(null);
      continue;
    }

    if (bitmapTextureFramebuffer == null) {
      bitmapTextureFramebuffer = new GlTextureFrameBuffer(GLES20.GL_RGBA);
    }
    bitmapTextureFramebuffer.setSize(scaledWidth, scaledHeight);

    GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, bitmapTextureFramebuffer.getFrameBufferId());
    GLES20.glFramebufferTexture2D(GLES20.GL_FRAMEBUFFER, GLES20.GL_COLOR_ATTACHMENT0,
        GLES20.GL_TEXTURE_2D, bitmapTextureFramebuffer.getTextureId(), 0);

    GLES20.glClearColor(0 /* red */, 0 /* green */, 0 /* blue */, 0 /* alpha */);
    GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
    if (frame.yuvFrame) {
      listenerAndParams.drawer.drawYuv(yuvTextures, bitmapMatrix, frame.rotatedWidth(),
          frame.rotatedHeight(), 0 /* viewportX */, 0 /* viewportY */, scaledWidth, scaledHeight);
    } else {
      listenerAndParams.drawer.drawOes(frame.textureId, bitmapMatrix, frame.rotatedWidth(),
          frame.rotatedHeight(), 0 /* viewportX */, 0 /* viewportY */, scaledWidth, scaledHeight);
    }

    final ByteBuffer bitmapBuffer = ByteBuffer.allocateDirect(scaledWidth * scaledHeight * 4);
    GLES20.glViewport(0, 0, scaledWidth, scaledHeight);
    GLES20.glReadPixels(
        0, 0, scaledWidth, scaledHeight, GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, bitmapBuffer);

    GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, 0);
    GlUtil.checkNoGLES2Error("EglRenderer.notifyCallbacks");

    final Bitmap bitmap = Bitmap.createBitmap(scaledWidth, scaledHeight, Bitmap.Config.ARGB_8888);
    bitmap.copyPixelsFromBuffer(bitmapBuffer);
    listenerAndParams.listener.onFrame(bitmap);
  }
}
 

/**
 * Saves the EGL surface to a file.
 * <p>
 * Expects that this object's EGL surface is current.
 */
public void saveFrame(File file) throws IOException {
    if (!mEglCore.isCurrent(mEGLSurface)) {
        throw new RuntimeException("Expected EGL context/surface is not current");
    }

    // glReadPixels fills in a "direct" ByteBuffer with what is essentially big-endian RGBA
    // data (i.e. a byte of red, followed by a byte of green...).  While the Bitmap
    // constructor that takes an int[] wants little-endian ARGB (blue/red swapped), the
    // Bitmap "copy pixels" method wants the same format GL provides.
    //
    // Ideally we'd have some way to re-use the ByteBuffer, especially if we're calling
    // here often.
    //
    // Making this even more interesting is the upside-down nature of GL, which means
    // our output will look upside down relative to what appears on screen if the
    // typical GL conventions are used.

    String filename = file.toString();

    int width = getWidth();
    int height = getHeight();
    ByteBuffer buf = ByteBuffer.allocateDirect(width * height * 4);
    buf.order(ByteOrder.LITTLE_ENDIAN);
    GLES20.glReadPixels(0, 0, width, height,
            GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, buf);
    GlUtil.checkGlError("glReadPixels");
    buf.rewind();

    BufferedOutputStream bos = null;
    try {
        bos = new BufferedOutputStream(new FileOutputStream(filename));
        Bitmap bmp = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
        bmp.copyPixelsFromBuffer(buf);
        bmp.compress(Bitmap.CompressFormat.PNG, 90, bos);
        bmp.recycle();
    } finally {
        if (bos != null)
            bos.close();
    }
    Log.d(TAG, "Saved " + width + "x" + height + " frame as '" + filename + "'");
}
 

public static Bitmap drawToBitmapByFilter(Bitmap bitmap, GPUImageFilter filter,
                                          int displayWidth, int displayHeight, boolean rotate){
    if(filter == null)
        return null;
    int width = bitmap.getWidth();
    int height = bitmap.getHeight();
    int[] mFrameBuffers = new int[1];
    int[] mFrameBufferTextures = new int[1];
    GLES20.glGenFramebuffers(1, mFrameBuffers, 0);
    GLES20.glGenTextures(1, mFrameBufferTextures, 0);
    GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, mFrameBufferTextures[0]);
    GLES20.glTexImage2D(GLES20.GL_TEXTURE_2D, 0, GLES20.GL_RGBA, width, height, 0,
            GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, null);
    GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D,
            GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_LINEAR);
    GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D,
            GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_LINEAR);
    GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D,
            GLES20.GL_TEXTURE_WRAP_S, GLES20.GL_CLAMP_TO_EDGE);
    GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D,
            GLES20.GL_TEXTURE_WRAP_T, GLES20.GL_CLAMP_TO_EDGE);
    GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, mFrameBuffers[0]);
    GLES20.glFramebufferTexture2D(GLES20.GL_FRAMEBUFFER, GLES20.GL_COLOR_ATTACHMENT0,
            GLES20.GL_TEXTURE_2D, mFrameBufferTextures[0], 0);
    GLES20.glViewport(0, 0, width, height);
    filter.onInputSizeChanged(width, height);
    filter.onDisplaySizeChanged(displayWidth, displayHeight);
    int textureId = OpenGlUtils.loadTexture(bitmap, OpenGlUtils.NO_TEXTURE, true);
    if(rotate){
        FloatBuffer gLCubeBuffer = ByteBuffer
                .allocateDirect(TextureRotationUtil.CUBE_BAAB.length * 4)
                .order(ByteOrder.nativeOrder())
                .asFloatBuffer();
        gLCubeBuffer.put(TextureRotationUtil.CUBE_BAAB).position(0);

        FloatBuffer gLTextureBuffer = ByteBuffer
                .allocateDirect(TextureRotationUtil.TEXTURE_NO_ROTATION.length * 4)
                .order(ByteOrder.nativeOrder())
                .asFloatBuffer();
        gLTextureBuffer.put(TextureRotationUtil.getRotation(Rotation.ROTATION_90, true, false)).position(0);
        filter.onDrawFrame(textureId, gLCubeBuffer, gLTextureBuffer);
    }else {
        filter.onDrawFrame(textureId);
    }
    IntBuffer ib = IntBuffer.allocate(width * height);
    GLES20.glReadPixels(0, 0, width, height, GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, ib);
    Bitmap result = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    result.copyPixelsFromBuffer(IntBuffer.wrap(ib.array()));
    GLES20.glDeleteTextures(1, new int[]{textureId}, 0);
    GLES20.glDeleteFramebuffers(1, mFrameBuffers, 0);
    GLES20.glDeleteTextures(1, mFrameBufferTextures, 0);
    filter.onInputSizeChanged(displayWidth, displayHeight);
    return result;
}
 

/**
 * Saves the EGL surface to a file.
 * <p>
 * Expects that this object's EGL surface is current.
 */
public void saveFrame(File file) throws IOException {
    if (!mEglCore.isCurrent(mEGLSurface)) {
        throw new RuntimeException("Expected EGL context/surface is not current");
    }

    // glReadPixels fills in a "direct" ByteBuffer with what is essentially big-endian RGBA
    // data (i.e. a byte of red, followed by a byte of green...).  While the Bitmap
    // constructor that takes an int[] wants little-endian ARGB (blue/red swapped), the
    // Bitmap "copy pixels" method wants the same format GL provides.
    //
    // Ideally we'd have some way to re-use the ByteBuffer, especially if we're calling
    // here often.
    //
    // Making this even more interesting is the upside-down nature of GL, which means
    // our output will look upside down relative to what appears on screen if the
    // typical GL conventions are used.

    String filename = file.toString();

    int width = getWidth();
    int height = getHeight();
    ByteBuffer buf = ByteBuffer.allocateDirect(width * height * 4);
    buf.order(ByteOrder.LITTLE_ENDIAN);
    GLES20.glReadPixels(0, 0, width, height,
            GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, buf);
    GlUtil.checkGlError("glReadPixels");
    buf.rewind();

    BufferedOutputStream bos = null;
    try {
        bos = new BufferedOutputStream(new FileOutputStream(filename));
        Bitmap bmp = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
        bmp.copyPixelsFromBuffer(buf);
        bmp.compress(Bitmap.CompressFormat.PNG, 90, bos);
        bmp.recycle();
    } finally {
        if (bos != null) bos.close();
    }
    Log.d(TAG, "Saved " + width + "x" + height + " frame as '" + filename + "'");
}
 

private void drawEnhancePass() {
    if (!hsvGenerated) {
        GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, renderFrameBuffer[0]);
        GLES20.glFramebufferTexture2D(GLES20.GL_FRAMEBUFFER, GLES20.GL_COLOR_ATTACHMENT0, GLES20.GL_TEXTURE_2D, renderTexture[0], 0);
        GLES20.glClear(0);

        GLES20.glUseProgram(rgbToHsvShaderProgram);
        GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
        GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, renderTexture[1]);
        GLES20.glUniform1i(rgbToHsvSourceImageHandle, 0);
        GLES20.glEnableVertexAttribArray(rgbToHsvInputTexCoordHandle);
        GLES20.glVertexAttribPointer(rgbToHsvInputTexCoordHandle, 2, GLES20.GL_FLOAT, false, 8, textureBuffer);
        GLES20.glEnableVertexAttribArray(rgbToHsvPositionHandle);
        GLES20.glVertexAttribPointer(rgbToHsvPositionHandle, 2, GLES20.GL_FLOAT, false, 8, vertexBuffer);
        GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0, 4);

        ByteBuffer hsvBuffer = ByteBuffer.allocateDirect(renderBufferWidth * renderBufferHeight * 4);
        GLES20.glReadPixels(0, 0, renderBufferWidth, renderBufferHeight, GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, hsvBuffer);

        GLES20.glBindTexture(GL10.GL_TEXTURE_2D, enhanceTextures[0]);
        GLES20.glTexParameteri(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MIN_FILTER, GL10.GL_LINEAR);
        GLES20.glTexParameteri(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MAG_FILTER, GL10.GL_LINEAR);
        GLES20.glTexParameteri(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_S, GL10.GL_CLAMP_TO_EDGE);
        GLES20.glTexParameteri(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_T, GL10.GL_CLAMP_TO_EDGE);
        GLES20.glTexImage2D(GLES20.GL_TEXTURE_2D, 0, GLES20.GL_RGBA, renderBufferWidth, renderBufferHeight, 0, GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, hsvBuffer);

        ByteBuffer buffer = null;
        try {
            buffer = ByteBuffer.allocateDirect(PGPhotoEnhanceSegments * PGPhotoEnhanceSegments * PGPhotoEnhanceHistogramBins * 4);
            Utilities.calcCDT(hsvBuffer, renderBufferWidth, renderBufferHeight, buffer);
        } catch (Exception e) {
            FileLog.e(e);
        }

        GLES20.glBindTexture(GL10.GL_TEXTURE_2D, enhanceTextures[1]);
        GLES20.glTexParameteri(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MIN_FILTER, GL10.GL_LINEAR);
        GLES20.glTexParameteri(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MAG_FILTER, GL10.GL_LINEAR);
        GLES20.glTexParameteri(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_S, GL10.GL_CLAMP_TO_EDGE);
        GLES20.glTexParameteri(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_T, GL10.GL_CLAMP_TO_EDGE);
        GLES20.glTexImage2D(GLES20.GL_TEXTURE_2D, 0, GLES20.GL_RGBA, 256, 16, 0, GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, buffer);

        hsvGenerated = true;
    }

    GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, renderFrameBuffer[1]);
    GLES20.glFramebufferTexture2D(GLES20.GL_FRAMEBUFFER, GLES20.GL_COLOR_ATTACHMENT0, GLES20.GL_TEXTURE_2D, renderTexture[1], 0);
    GLES20.glClear(0);

    GLES20.glUseProgram(enhanceShaderProgram);
    GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
    GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, enhanceTextures[0]);
    GLES20.glUniform1i(enhanceSourceImageHandle, 0);
    GLES20.glActiveTexture(GLES20.GL_TEXTURE1);
    GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, enhanceTextures[1]);
    GLES20.glUniform1i(enhanceInputImageTexture2Handle, 1);
    if (showOriginal) {
        GLES20.glUniform1f(enhanceIntensityHandle, 0);
    } else {
        GLES20.glUniform1f(enhanceIntensityHandle, getEnhanceValue());
    }

    GLES20.glEnableVertexAttribArray(enhanceInputTexCoordHandle);
    GLES20.glVertexAttribPointer(enhanceInputTexCoordHandle, 2, GLES20.GL_FLOAT, false, 8, textureBuffer);
    GLES20.glEnableVertexAttribArray(enhancePositionHandle);
    GLES20.glVertexAttribPointer(enhancePositionHandle, 2, GLES20.GL_FLOAT, false, 8, vertexBuffer);
    GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0, 4);
}
 

public ByteBuffer getFrame() {
    mPixelBuf.rewind();
    GLES20.glReadPixels(0, 0, mWidth, mHeight, GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, mPixelBuf);
    return mPixelBuf;
}
 

/**
 * 指定したバッファにピクセルデータを格納します.
 * @param buffer ピクセルデータを格納するバッファ
 * @param w 横幅
 * @param h 縦幅
 */
public void readPixelBuffer(Buffer buffer, int w, int h) {
    GLES20.glReadPixels(0, 0, w, h, GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, buffer);
}
 

@Override
	public void drawFrame() {
		if(frameBuffer == null) {
			if(getWidth() != 0 && getHeight() != 0) {
				initFBO();
			} else {
				return;
			}
		}

		GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, frameBuffer[0]);
		
		super.drawFrame();
		
		int[] pixels = new int[getWidth()*getHeight()];
		IntBuffer intBuffer = IntBuffer.wrap(pixels);
		intBuffer.position(0);
		GLES20.glReadPixels(0, 0, getWidth(), getHeight(), GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, intBuffer);

		GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, 0);
		
		for(int i = 0; i < pixels.length; i++) {
			pixels[i] = (pixels[i] & (0xFF00FF00)) | ((pixels[i] >> 16) & 0x000000FF) | ((pixels[i] << 16) & 0x00FF0000); //swap red and blue to translate back to bitmap rgb style
		}
		
		Bitmap image = Bitmap.createBitmap(pixels, getWidth(), getHeight(), Bitmap.Config.ARGB_8888);
		callback.bitmapCreated(image);
	} 

@Override
	public void drawFrame() {
		if(frameBuffer == null) {
			if(getWidth() != 0 && getHeight() != 0) {
				initFBO();
			} else {
				return;
			}
		}

		GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, frameBuffer[0]);
		
		super.drawFrame();
		
		int[] pixels = new int[getWidth()*getHeight()];
		IntBuffer intBuffer = IntBuffer.wrap(pixels);
		intBuffer.position(0);
		GLES20.glReadPixels(0, 0, getWidth(), getHeight(), GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, intBuffer);

		GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, 0);
		
		for(int i = 0; i < pixels.length; i++) {
			pixels[i] = (pixels[i] & (0xFF00FF00)) | ((pixels[i] >> 16) & 0x000000FF) | ((pixels[i] << 16) & 0x00FF0000); //swap red and blue to translate back to bitmap rgb style
		}
		
		Bitmap image = Bitmap.createBitmap(pixels, getWidth(), getHeight(), Bitmap.Config.ARGB_8888);
		callback.bitmapCreated(image);
	}