mirror of https://github.com/status-im/qzxing.git
71 lines
2.5 KiB
C++
71 lines
2.5 KiB
C++
/*
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* GreyscaleLuminanceSource.cpp
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* zxing
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*
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* Copyright 2010 ZXing authors All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <zxing/common/GreyscaleLuminanceSource.h>
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#include <zxing/common/GreyscaleRotatedLuminanceSource.h>
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#include <zxing/common/IllegalArgumentException.h>
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namespace zxing {
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GreyscaleLuminanceSource::GreyscaleLuminanceSource(unsigned char* greyData, int dataWidth,
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int dataHeight, int left, int top, int width, int height) : greyData_(greyData),
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dataWidth_(dataWidth), dataHeight_(dataHeight), left_(left), top_(top), width_(width),
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height_(height) {
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if (left + width > dataWidth || top + height > dataHeight || top < 0 || left < 0) {
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throw IllegalArgumentException("Crop rectangle does not fit within image data.");
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}
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}
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unsigned char* GreyscaleLuminanceSource::getRow(int y, unsigned char* row) {
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if (y < 0 || y >= this->getHeight()) {
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throw IllegalArgumentException("Requested row is outside the image: " + y);
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}
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int width = getWidth();
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// TODO(flyashi): determine if row has enough size.
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if (row == NULL) {
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row = new unsigned char[width_];
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}
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int offset = (y + top_) * dataWidth_ + left_;
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memcpy(row, &greyData_[offset], width);
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return row;
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}
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unsigned char* GreyscaleLuminanceSource::getMatrix() {
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int size = width_ * height_;
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unsigned char* result = new unsigned char[size];
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if (left_ == 0 && top_ == 0 && dataWidth_ == width_ && dataHeight_ == height_) {
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memcpy(result, greyData_, size);
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} else {
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for (int row = 0; row < height_; row++) {
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memcpy(result + row * width_, greyData_ + (top_ + row) * dataWidth_ + left_, width_);
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}
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}
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return result;
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}
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Ref<LuminanceSource> GreyscaleLuminanceSource::rotateCounterClockwise() {
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// Intentionally flip the left, top, width, and height arguments as needed. dataWidth and
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// dataHeight are always kept unrotated.
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return Ref<LuminanceSource> (new GreyscaleRotatedLuminanceSource(greyData_, dataWidth_,
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dataHeight_, top_, left_, height_, width_));
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}
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} /* namespace */
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