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;
CBC_QRGridSampler()28 CBC_QRGridSampler::CBC_QRGridSampler() {}
~CBC_QRGridSampler()29 CBC_QRGridSampler::~CBC_QRGridSampler() {}
GetInstance()30 CBC_QRGridSampler& CBC_QRGridSampler::GetInstance() {
31 return m_gridSampler;
32 }
CheckAndNudgePoints(CBC_CommonBitMatrix * image,CFX_FloatArray * points,int32_t & e)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 }
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)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