| // 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, NULL); |
| 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(); |
| } |