问题描述

copyPixelsFromBuffer 结果图是原图尺寸的2倍，如何实现？

以下代码拿到的结果图尺寸与原图保持一致

ByteBuffer mOutBuffer = ByteBuffer.allocate(width*2 * height*2 * 4);
mOutBuffer.rewind();
mBitmap.copyPixelsToBuffer(mOutBuffer);
upscale.upScale(mOutBuffer.array() mBitmap.getWidth() mBitmap.getHeight());
mOutBuffer.rewind();
mBitmap.copyPixelsFromBuffer(mOutBuffer);

        public void upScale(byte[] bgradataint width int height){     float zoomFactor = 2.0f;     int format_in = CVImageFormat.CV_PIX_FMT_BGRA8888;       int w_in = width;       int h_in = height;       int s_in = w_in * 4;       int format_out = format_in;       int w_out = w_in * (int)zoomFactor;       int h_out = h_in * (int)zoomFactor;       int s_out = w_out * 4;       int rst = CvImageApiBridge.IMAGESDK_INSTANCE.cv_imagesdk_upscale(               bgradataformat_in w_in h_in s_in                bgradata format_out w_out h_out s_out               zoomFactor2.0f1true);       if (rst != ResultCode.CV_OK.getResultCode()) {           throw new RuntimeException(""Calling cv_imagesdk_upscale method failed! ResultCode="" + rst);       }   }