InvertedLuminanceSource.cpp Example File

 // -*- mode:c++; tab-width:2; indent-tabs-mode:nil; c-basic-offset:2 -*-
 /*
  *  Copyright 2013 ZXing authors All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 #include <zxing/ZXing.h>
 #include <zxing/InvertedLuminanceSource.h>

 using zxing::boolean;
 using zxing::Ref;
 using zxing::ArrayRef;
 using zxing::LuminanceSource;

 namespace zxing {

 InvertedLuminanceSource::InvertedLuminanceSource(Ref<LuminanceSource> const& delegate_)
     : Super(delegate_->getWidth(), delegate_->getHeight()), delegate(delegate_) {}

 ArrayRef<byte> InvertedLuminanceSource::getRow(int y, ArrayRef<byte> row) const {
   row = delegate->getRow(y, row);
   int width = getWidth();
   for (int i = 0; i < width; i++) {
     row[i] = (byte) (255 - (row[i] & 0xFF));
   }
   return row;
 }

 ArrayRef<byte> InvertedLuminanceSource::getMatrix() const {
   ArrayRef<byte> matrix = delegate->getMatrix();
   int length = getWidth() * getHeight();
   ArrayRef<byte> invertedMatrix(length);
   for (int i = 0; i < length; i++) {
     invertedMatrix[i] = (byte) (255 - (matrix[i] & 0xFF));
   }
   return invertedMatrix;
 }

 zxing::boolean InvertedLuminanceSource::isCropSupported() const {
   return delegate->isCropSupported();
 }

 Ref<LuminanceSource> InvertedLuminanceSource::crop(int left, int top, int width, int height) const {
   return Ref<LuminanceSource>(new InvertedLuminanceSource(delegate->crop(left, top, width, height)));
 }

 boolean InvertedLuminanceSource::isRotateSupported() const {
   return delegate->isRotateSupported();
 }

 Ref<LuminanceSource> InvertedLuminanceSource::invert() const {
   return delegate;
 }

 Ref<LuminanceSource> InvertedLuminanceSource::rotateCounterClockwise() const {
   return Ref<LuminanceSource>(new InvertedLuminanceSource(delegate->rotateCounterClockwise()));
 }

 }