mirror of https://github.com/status-im/qzxing.git
87 lines
2.7 KiB
C++
87 lines
2.7 KiB
C++
// -*- mode:c++; tab-width:2; indent-tabs-mode:nil; c-basic-offset:2 -*-
|
|
/*
|
|
* LuminanceSource.cpp
|
|
* zxing
|
|
*
|
|
* Copyright 2008 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 <sstream>
|
|
#include <zxing/LuminanceSource.h>
|
|
#include <zxing/InvertedLuminanceSource.h>
|
|
#include <zxing/common/IllegalArgumentException.h>
|
|
|
|
using zxing::Ref;
|
|
using zxing::LuminanceSource;
|
|
|
|
LuminanceSource::LuminanceSource(int width_, int height_) :width(width_), height(height_) {}
|
|
|
|
LuminanceSource::~LuminanceSource() {}
|
|
|
|
bool LuminanceSource::isCropSupported() const {
|
|
return false;
|
|
}
|
|
|
|
Ref<LuminanceSource> LuminanceSource::crop(int, int, int, int) const {
|
|
throw IllegalArgumentException("This luminance source does not support cropping.");
|
|
}
|
|
|
|
bool LuminanceSource::isRotateSupported() const {
|
|
return false;
|
|
}
|
|
|
|
Ref<LuminanceSource> LuminanceSource::rotateCounterClockwise() const {
|
|
throw IllegalArgumentException("This luminance source does not support rotation.");
|
|
}
|
|
|
|
LuminanceSource::operator std::string() const {
|
|
ArrayRef<char> row;
|
|
std::ostringstream oss;
|
|
for (int y = 0; y < getHeight(); y++) {
|
|
row = getRow(y, row);
|
|
for (int x = 0; x < getWidth(); x++) {
|
|
int luminance = row[x] & 0xFF;
|
|
char c;
|
|
if (luminance < 0x40) {
|
|
c = '#';
|
|
} else if (luminance < 0x80) {
|
|
c = '+';
|
|
} else if (luminance < 0xC0) {
|
|
c = '.';
|
|
} else {
|
|
c = ' ';
|
|
}
|
|
oss << c;
|
|
}
|
|
oss << '\n';
|
|
}
|
|
return oss.str();
|
|
}
|
|
|
|
Ref<LuminanceSource> LuminanceSource::invert() const {
|
|
|
|
// N.B.: this only works because we use counted objects with the
|
|
// count in the object. This is _not_ how things like shared_ptr
|
|
// work. They do not allow you to make a smart pointer from a native
|
|
// pointer more than once. If we ever switch to (something like)
|
|
// shared_ptr's, the luminace source is going to have keep a weak
|
|
// pointer to itself from which it can create a strong pointer as
|
|
// needed. And, FWIW, that has nasty semantics in the face of
|
|
// exceptions during construction.
|
|
|
|
return Ref<LuminanceSource>
|
|
(new InvertedLuminanceSource(Ref<LuminanceSource>(const_cast<LuminanceSource*>(this))));
|
|
}
|