// 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 "../barcode.h" #include "../common/BC_CommonPerspectiveTransform.h" #include "../common/BC_CommonBitMatrix.h" #include "BC_QRGridSampler.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) { CBC_AutoPtr<CBC_CommonPerspectiveTransform> transform(CBC_CommonPerspectiveTransform::QuadrilateralToQuadrilateral( p1ToX, p1ToY, p2ToX, p2ToY, p3ToX, p3ToY, p4ToX, p4ToY, p1FromX, p1FromY, p2FromX, p2FromY, p3FromX, p3FromY, p4FromX, p4FromY)); CBC_CommonBitMatrix *tempBitM = FX_NEW CBC_CommonBitMatrix(); tempBitM->Init(dimensionX, dimensionY); CBC_AutoPtr<CBC_CommonBitMatrix> bits(tempBitM); 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(); }