mirror of https://github.com/status-im/qzxing.git
66 lines
2.3 KiB
C++
66 lines
2.3 KiB
C++
/*
|
|
* GreyscaleRotatedLuminanceSource.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/GreyscaleRotatedLuminanceSource.h>
|
|
#include <zxing/common/IllegalArgumentException.h>
|
|
|
|
namespace zxing {
|
|
|
|
// Note that dataWidth and dataHeight are not reversed, as we need to be able to traverse the
|
|
// greyData correctly, which does not get rotated.
|
|
GreyscaleRotatedLuminanceSource::GreyscaleRotatedLuminanceSource(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) {
|
|
|
|
// Intentionally comparing to the opposite dimension since we're rotated.
|
|
if (left + width > dataHeight || top + height > dataWidth) {
|
|
throw IllegalArgumentException("Crop rectangle does not fit within image data.");
|
|
}
|
|
}
|
|
|
|
// The API asks for rows, but we're rotated, so we return columns.
|
|
unsigned char* GreyscaleRotatedLuminanceSource::getRow(int y, unsigned char* row) {
|
|
if (y < 0 || y >= getHeight()) {
|
|
throw IllegalArgumentException("Requested row is outside the image.");
|
|
}
|
|
int width = getWidth();
|
|
if (row == NULL) {
|
|
row = new unsigned char[width];
|
|
}
|
|
int offset = (left_ * dataWidth_) + (dataWidth_ - (y + top_));
|
|
for (int x = 0; x < width; x++) {
|
|
row[x] = greyData_[offset];
|
|
offset += dataWidth_;
|
|
}
|
|
return row;
|
|
}
|
|
|
|
unsigned char* GreyscaleRotatedLuminanceSource::getMatrix() {
|
|
unsigned char* result = new unsigned char[width_ * height_];
|
|
// This depends on getRow() honoring its second parameter.
|
|
for (int y = 0; y < height_; y++) {
|
|
getRow(y, &result[y * width_]);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
} // namespace
|