1 // Copyright 2014 PDFium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com 6 // Original code is licensed as follows: 7 /* 8 * Copyright 2007 ZXing authors 9 * 10 * Licensed under the Apache License, Version 2.0 (the "License"); 11 * you may not use this file except in compliance with the License. 12 * You may obtain a copy of the License at 13 * 14 * http://www.apache.org/licenses/LICENSE-2.0 15 * 16 * Unless required by applicable law or agreed to in writing, software 17 * distributed under the License is distributed on an "AS IS" BASIS, 18 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 19 * See the License for the specific language governing permissions and 20 * limitations under the License. 21 */ 22 23 #include "xfa/src/fxbarcode/barcode.h" 24 #include "xfa/src/fxbarcode/common/BC_CommonPerspectiveTransform.h" 25 #include "xfa/src/fxbarcode/common/BC_CommonBitMatrix.h" 26 #include "BC_QRGridSampler.h" 27 CBC_QRGridSampler CBC_QRGridSampler::m_gridSampler; 28 CBC_QRGridSampler::CBC_QRGridSampler() {} 29 CBC_QRGridSampler::~CBC_QRGridSampler() {} 30 CBC_QRGridSampler& CBC_QRGridSampler::GetInstance() { 31 return m_gridSampler; 32 } 33 void CBC_QRGridSampler::CheckAndNudgePoints(CBC_CommonBitMatrix* image, 34 CFX_FloatArray* points, 35 int32_t& e) { 36 int32_t width = image->GetWidth(); 37 int32_t height = image->GetHeight(); 38 FX_BOOL nudged = TRUE; 39 int32_t offset; 40 for (offset = 0; offset < points->GetSize() && nudged; offset += 2) { 41 int32_t x = (int32_t)(*points)[offset]; 42 int32_t y = (int32_t)(*points)[offset + 1]; 43 if (x < -1 || x > width || y < -1 || y > height) { 44 e = BCExceptionRead; 45 BC_EXCEPTION_CHECK_ReturnVoid(e); 46 } 47 nudged = FALSE; 48 if (x == -1) { 49 (*points)[offset] = 0.0f; 50 nudged = TRUE; 51 } else if (x == width) { 52 (*points)[offset] = (FX_FLOAT)(width - 1); 53 nudged = TRUE; 54 } 55 if (y == -1) { 56 (*points)[offset + 1] = 0.0f; 57 nudged = TRUE; 58 } else if (y == height) { 59 (*points)[offset + 1] = (FX_FLOAT)(height - 1); 60 nudged = TRUE; 61 } 62 } 63 nudged = TRUE; 64 for (offset = (*points).GetSize() - 2; offset >= 0 && nudged; offset -= 2) { 65 int32_t x = (int32_t)(*points)[offset]; 66 int32_t y = (int32_t)(*points)[offset + 1]; 67 if (x < -1 || x > width || y < -1 || y > height) { 68 e = BCExceptionRead; 69 BC_EXCEPTION_CHECK_ReturnVoid(e); 70 } 71 nudged = FALSE; 72 if (x == -1) { 73 (*points)[offset] = 0.0f; 74 nudged = TRUE; 75 } else if (x == width) { 76 (*points)[offset] = (FX_FLOAT)(width - 1); 77 nudged = TRUE; 78 } 79 if (y == -1) { 80 (*points)[offset + 1] = 0.0f; 81 nudged = TRUE; 82 } else if (y == height) { 83 (*points)[offset + 1] = (FX_FLOAT)(height - 1); 84 nudged = TRUE; 85 } 86 } 87 } 88 CBC_CommonBitMatrix* CBC_QRGridSampler::SampleGrid(CBC_CommonBitMatrix* image, 89 int32_t dimensionX, 90 int32_t dimensionY, 91 FX_FLOAT p1ToX, 92 FX_FLOAT p1ToY, 93 FX_FLOAT p2ToX, 94 FX_FLOAT p2ToY, 95 FX_FLOAT p3ToX, 96 FX_FLOAT p3ToY, 97 FX_FLOAT p4ToX, 98 FX_FLOAT p4ToY, 99 FX_FLOAT p1FromX, 100 FX_FLOAT p1FromY, 101 FX_FLOAT p2FromX, 102 FX_FLOAT p2FromY, 103 FX_FLOAT p3FromX, 104 FX_FLOAT p3FromY, 105 FX_FLOAT p4FromX, 106 FX_FLOAT p4FromY, 107 int32_t& e) { 108 CBC_AutoPtr<CBC_CommonPerspectiveTransform> transform( 109 CBC_CommonPerspectiveTransform::QuadrilateralToQuadrilateral( 110 p1ToX, p1ToY, p2ToX, p2ToY, p3ToX, p3ToY, p4ToX, p4ToY, p1FromX, 111 p1FromY, p2FromX, p2FromY, p3FromX, p3FromY, p4FromX, p4FromY)); 112 CBC_CommonBitMatrix* tempBitM = new CBC_CommonBitMatrix(); 113 tempBitM->Init(dimensionX, dimensionY); 114 CBC_AutoPtr<CBC_CommonBitMatrix> bits(tempBitM); 115 CFX_FloatArray points; 116 points.SetSize(dimensionX << 1); 117 for (int32_t y = 0; y < dimensionY; y++) { 118 int32_t max = points.GetSize(); 119 FX_FLOAT iValue = (FX_FLOAT)(y + 0.5f); 120 int32_t x; 121 for (x = 0; x < max; x += 2) { 122 points[x] = (FX_FLOAT)((x >> 1) + 0.5f); 123 points[x + 1] = iValue; 124 } 125 transform->TransformPoints(&points); 126 CheckAndNudgePoints(image, &points, e); 127 BC_EXCEPTION_CHECK_ReturnValue(e, NULL); 128 for (x = 0; x < max; x += 2) { 129 if (image->Get((int32_t)points[x], (int32_t)points[x + 1])) { 130 bits->Set(x >> 1, y); 131 } 132 } 133 } 134 return bits.release(); 135 } 136
