CameraManager.java 文件源码

/**
 * Allows third party apps to specify the scanning rectangle dimensions, rather than determine
 * them automatically based on screen resolution.
 *
 * @param width  The width in pixels to scan.
 * @param height The height in pixels to scan.
 */
public synchronized void setManualFramingRect(int width, int height) {
    if (initialized) {
        Point screenResolution = configManager.getScreenResolution();
        if (width > screenResolution.x) {
            width = screenResolution.x;
        }
        if (height > screenResolution.y) {
            height = screenResolution.y;
        }
        int leftOffset = (screenResolution.x - width) / 2;
        int topOffset = (screenResolution.y - height) / 2;
        framingRect = new Rect(leftOffset, topOffset, leftOffset + width, topOffset + height);
        Log.d(TAG, "Calculated manual framing rect: " + framingRect);
        framingRectInPreview = null;
    } else {
        requestedFramingRectWidth = width;
        requestedFramingRectHeight = height;
    }
}