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// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
// Original code is licensed as follows:
/*
* Copyright 2007 ZXing authors
*
* 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 "xfa/fxbarcode/qrcode/BC_QRGridSampler.h"
#include <memory>
#include "xfa/fxbarcode/common/BC_CommonBitMatrix.h"
#include "xfa/fxbarcode/common/BC_CommonPerspectiveTransform.h"
#include "xfa/fxbarcode/utils.h"
CBC_QRGridSampler CBC_QRGridSampler::m_gridSampler;
CBC_QRGridSampler::CBC_QRGridSampler() {}
CBC_QRGridSampler::~CBC_QRGridSampler() {}
CBC_QRGridSampler& CBC_QRGridSampler::GetInstance() {
return m_gridSampler;
}
void CBC_QRGridSampler::CheckAndNudgePoints(CBC_CommonBitMatrix* image,
CFX_FloatArray* points,
int32_t& e) {
int32_t width = image->GetWidth();
int32_t height = image->GetHeight();
FX_BOOL nudged = TRUE;
int32_t offset;
for (offset = 0; offset < points->GetSize() && nudged; offset += 2) {
int32_t x = (int32_t)(*points)[offset];
int32_t y = (int32_t)(*points)[offset + 1];
if (x < -1 || x > width || y < -1 || y > height) {
e = BCExceptionRead;
BC_EXCEPTION_CHECK_ReturnVoid(e);
}
nudged = FALSE;
if (x == -1) {
(*points)[offset] = 0.0f;
nudged = TRUE;
} else if (x == width) {
(*points)[offset] = (FX_FLOAT)(width - 1);
nudged = TRUE;
}
if (y == -1) {
(*points)[offset + 1] = 0.0f;
nudged = TRUE;
} else if (y == height) {
(*points)[offset + 1] = (FX_FLOAT)(height - 1);
nudged = TRUE;
}
}
nudged = TRUE;
for (offset = (*points).GetSize() - 2; offset >= 0 && nudged; offset -= 2) {
int32_t x = (int32_t)(*points)[offset];
int32_t y = (int32_t)(*points)[offset + 1];
if (x < -1 || x > width || y < -1 || y > height) {
e = BCExceptionRead;
BC_EXCEPTION_CHECK_ReturnVoid(e);
}
nudged = FALSE;
if (x == -1) {
(*points)[offset] = 0.0f;
nudged = TRUE;
} else if (x == width) {
(*points)[offset] = (FX_FLOAT)(width - 1);
nudged = TRUE;
}
if (y == -1) {
(*points)[offset + 1] = 0.0f;
nudged = TRUE;
} else if (y == height) {
(*points)[offset + 1] = (FX_FLOAT)(height - 1);
nudged = TRUE;
}
}
}
CBC_CommonBitMatrix* CBC_QRGridSampler::SampleGrid(CBC_CommonBitMatrix* image,
int32_t dimensionX,
int32_t dimensionY,
FX_FLOAT p1ToX,
FX_FLOAT p1ToY,
FX_FLOAT p2ToX,
FX_FLOAT p2ToY,
FX_FLOAT p3ToX,
FX_FLOAT p3ToY,
FX_FLOAT p4ToX,
FX_FLOAT p4ToY,
FX_FLOAT p1FromX,
FX_FLOAT p1FromY,
FX_FLOAT p2FromX,
FX_FLOAT p2FromY,
FX_FLOAT p3FromX,
FX_FLOAT p3FromY,
FX_FLOAT p4FromX,
FX_FLOAT p4FromY,
int32_t& e) {
std::unique_ptr<CBC_CommonPerspectiveTransform> transform(
CBC_CommonPerspectiveTransform::QuadrilateralToQuadrilateral(
p1ToX, p1ToY, p2ToX, p2ToY, p3ToX, p3ToY, p4ToX, p4ToY, p1FromX,
p1FromY, p2FromX, p2FromY, p3FromX, p3FromY, p4FromX, p4FromY));
std::unique_ptr<CBC_CommonBitMatrix> bits(new CBC_CommonBitMatrix());
bits->Init(dimensionX, dimensionY);
CFX_FloatArray points;
points.SetSize(dimensionX << 1);
for (int32_t y = 0; y < dimensionY; y++) {
int32_t max = points.GetSize();
FX_FLOAT iValue = (FX_FLOAT)(y + 0.5f);
int32_t x;
for (x = 0; x < max; x += 2) {
points[x] = (FX_FLOAT)((x >> 1) + 0.5f);
points[x + 1] = iValue;
}
transform->TransformPoints(&points);
CheckAndNudgePoints(image, &points, e);
BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
for (x = 0; x < max; x += 2) {
if (image->Get((int32_t)points[x], (int32_t)points[x + 1])) {
bits->Set(x >> 1, y);
}
}
}
return bits.release();
}
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