Java IntBuffer.array方法代码示例

import java.nio.IntBuffer; //导入方法依赖的package包/类
private void convertToBitmap() {
    int[] iat = new int[mWidth * mHeight];
    IntBuffer ib = IntBuffer.allocate(mWidth * mHeight);
    mGL.glReadPixels(0, 0, mWidth, mHeight, GL_RGBA, GL_UNSIGNED_BYTE, ib);
    int[] ia = ib.array();

    //Stupid !
    // Convert upside down mirror-reversed image to right-side up normal
    // image.
    for (int i = 0; i < mHeight; i++) {
        for (int j = 0; j < mWidth; j++) {
            iat[(mHeight - i - 1) * mWidth + j] = ia[i * mWidth + j];
        }
    }
    

    mBitmap = Bitmap.createBitmap(mWidth, mHeight, Bitmap.Config.ARGB_8888);
    mBitmap.copyPixelsFromBuffer(IntBuffer.wrap(iat));
}
 

import java.nio.IntBuffer; //导入方法依赖的package包/类
/**
 * Converts a Bitmap to a GrayscaleImage.
 */
@NonNull
public GrayscaleImage bitmapToGrayscaleImage(@NonNull Bitmap bitmap) {
    String stopwatchSessionId = log.startStopwatch(getStopwatchSessionId("bitmapToGrayscaleImage"));

    int width = bitmap.getWidth();
    int height = bitmap.getHeight();
    int size = width * height;

    IntBuffer intBuffer = IntBuffer.allocate(size);
    bitmap.copyPixelsToBuffer(intBuffer);
    int[] buffer = intBuffer.array();

    byte[] data = new byte[size];
    for (int index = 0; index < size; index++) {
        data[index] = (byte) (buffer[index] >> 16);
    }

    log.stopStopwatch(stopwatchSessionId);
    return new GrayscaleImage(data, width, height);
}
 

import java.nio.IntBuffer; //导入方法依赖的package包/类
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;
}
 

import java.nio.IntBuffer; //导入方法依赖的package包/类
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;
}
 

import java.nio.IntBuffer; //导入方法依赖的package包/类
@Override
    public void bufferOutput(IntBuffer buffer) {
        int width = getWidth();
        int height = getHeight();
        if (width <= 0 || height <= 0) {
            if (mCallback != null) {
                mCallback.bitmapOutput(null);
            }
            return;
        }

        try {
            int[] pixels = buffer.array();

            // 方案一，使用copyPixelsFromBuffer，是方案二速度的2倍以上
            Bitmap bitmap = Bitmap.createBitmap(width, height, mConfig);
            bitmap.copyPixelsFromBuffer(IntBuffer.wrap(pixels));

            // 方案二，手动转换像素数组
//            for (int i = 0; i < pixels.length; i++) {
//                // glReadPixels设置GLES20.GL_RGBA时，读取出来格式为ABGR，要转换为Bitmap需要的ARGB，同时设置Alpha值为1
//                pixels[i] = (0xFF000000)
//                        | ((pixels[i] << 16) & 0x00FF0000)
//                        | (pixels[i] & (0xFF00FF00))
//                        | ((pixels[i] >> 16) & 0x000000FF);
//            }
//            Bitmap bitmap = Bitmap.createBitmap(pixels, width, height, mConfig);
            if (mCallback != null) {
                mCallback.bitmapOutput(bitmap);
            }
        } catch (OutOfMemoryError e) {
            e.printStackTrace();
            if (mCallback != null) {
                mCallback.bitmapOutput(null);
            }
        }
    }
 

import java.nio.IntBuffer; //导入方法依赖的package包/类
static
public int[] toIntArray(Tensor tensor){
	IntBuffer intBuffer = IntBuffer.allocate(tensor.numElements());

	tensor.writeTo(intBuffer);

	return intBuffer.array();
}
 

import java.nio.IntBuffer; //导入方法依赖的package包/类
public synchronized static int[] glGetIntegerv(int value, int size) {
    final IntBuffer buffer = IntBuffer.allocate(size);
    GLES10.glGetIntegerv(value, buffer);
    return buffer.array();
}