mirror of
https://github.com/seiichiro0185/sailotp.git
synced 2024-05-03 19:23:59 +00:00
71 lines
2.6 KiB
C++
71 lines
2.6 KiB
C++
/*
|
|
* GreyscaleLuminanceSource.cpp
|
|
* zxing
|
|
*
|
|
* Copyright 2010 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/common/GreyscaleLuminanceSource.h>
|
|
#include <zxing/common/GreyscaleRotatedLuminanceSource.h>
|
|
#include <zxing/common/IllegalArgumentException.h>
|
|
|
|
namespace zxing {
|
|
|
|
GreyscaleLuminanceSource::GreyscaleLuminanceSource(unsigned char* greyData, int dataWidth,
|
|
int dataHeight, int left, int top, int width, int height) : greyData_(greyData),
|
|
dataWidth_(dataWidth), dataHeight_(dataHeight), left_(left), top_(top), width_(width),
|
|
height_(height) {
|
|
|
|
if (left + width > dataWidth || top + height > dataHeight || top < 0 || left < 0) {
|
|
throw IllegalArgumentException("Crop rectangle does not fit within image data.");
|
|
}
|
|
}
|
|
|
|
unsigned char* GreyscaleLuminanceSource::getRow(int y, unsigned char* row) {
|
|
if (y < 0 || y >= this->getHeight()) {
|
|
throw IllegalArgumentException("Requested row is outside the image.");
|
|
}
|
|
int width = getWidth();
|
|
// TODO(flyashi): determine if row has enough size.
|
|
if (row == NULL) {
|
|
row = new unsigned char[width_];
|
|
}
|
|
int offset = (y + top_) * dataWidth_ + left_;
|
|
memcpy(row, &greyData_[offset], width);
|
|
return row;
|
|
}
|
|
|
|
unsigned char* GreyscaleLuminanceSource::getMatrix() {
|
|
int size = width_ * height_;
|
|
unsigned char* result = new unsigned char[size];
|
|
if (left_ == 0 && top_ == 0 && dataWidth_ == width_ && dataHeight_ == height_) {
|
|
memcpy(result, greyData_, size);
|
|
} else {
|
|
for (int row = 0; row < height_; row++) {
|
|
memcpy(result + row * width_, greyData_ + (top_ + row) * dataWidth_ + left_, width_);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
Ref<LuminanceSource> GreyscaleLuminanceSource::rotateCounterClockwise() {
|
|
// Intentionally flip the left, top, width, and height arguments as needed. dataWidth and
|
|
// dataHeight are always kept unrotated.
|
|
return Ref<LuminanceSource> (new GreyscaleRotatedLuminanceSource(greyData_, dataWidth_,
|
|
dataHeight_, top_, left_, height_, width_));
|
|
}
|
|
|
|
} /* namespace */
|