1 files changed, 139 insertions, 0 deletions
diff --git a/xfa/fxbarcode/qrcode/BC_QRGridSampler.cpp b/xfa/fxbarcode/qrcode/BC_QRGridSampler.cpp
new file mode 100644
index 0000000000..881e74a98c
--- /dev/null
+++ b/xfa/fxbarcode/qrcode/BC_QRGridSampler.cpp
@@ -0,0 +1,139 @@
+// 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();
+}