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authorDan Sinclair <dsinclair@chromium.org>2016-03-14 14:14:16 -0400
committerDan Sinclair <dsinclair@chromium.org>2016-03-14 14:14:16 -0400
commit1770c021cf998ff1b33855b1397f6ea8ff9f7cd7 (patch)
tree285e39abd4b5872d8cd632b9e331b0667fdc3eae /xfa/fxbarcode/common/BC_WhiteRectangleDetector.cpp
parentf766ad219f66543654520f6a1955836f519e26d1 (diff)
downloadpdfium-1770c021cf998ff1b33855b1397f6ea8ff9f7cd7.tar.xz
Move xfa/src up to xfa/.
This CL moves the xfa/src files up to the xfa/ directory and fixes the includes, include guards, and build files. R=tsepez@chromium.org Review URL: https://codereview.chromium.org/1803723002 .
Diffstat (limited to 'xfa/fxbarcode/common/BC_WhiteRectangleDetector.cpp')
-rw-r--r--xfa/fxbarcode/common/BC_WhiteRectangleDetector.cpp254
1 files changed, 254 insertions, 0 deletions
diff --git a/xfa/fxbarcode/common/BC_WhiteRectangleDetector.cpp b/xfa/fxbarcode/common/BC_WhiteRectangleDetector.cpp
new file mode 100644
index 0000000000..2aeacd1399
--- /dev/null
+++ b/xfa/fxbarcode/common/BC_WhiteRectangleDetector.cpp
@@ -0,0 +1,254 @@
+// 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 2010 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/common/BC_WhiteRectangleDetector.h"
+
+#include <memory>
+
+#include "xfa/fxbarcode/BC_ResultPoint.h"
+#include "xfa/fxbarcode/common/BC_CommonBitMatrix.h"
+#include "xfa/fxbarcode/utils.h"
+
+CBC_WhiteRectangleDetector::CBC_WhiteRectangleDetector(
+ CBC_CommonBitMatrix* image) {
+ m_image = image;
+ m_height = image->GetHeight();
+ m_width = image->GetWidth();
+ m_leftInit = (m_width - INIT_SIZE) >> 1;
+ m_rightInit = (m_width + INIT_SIZE) >> 1;
+ m_upInit = (m_height - INIT_SIZE) >> 1;
+ m_downInit = (m_height + INIT_SIZE) >> 1;
+}
+void CBC_WhiteRectangleDetector::Init(int32_t& e) {
+ if (m_upInit < 0 || m_leftInit < 0 || m_downInit >= m_height ||
+ m_rightInit >= m_width) {
+ e = BCExceptionNotFound;
+ BC_EXCEPTION_CHECK_ReturnVoid(e);
+ }
+}
+CBC_WhiteRectangleDetector::CBC_WhiteRectangleDetector(
+ CBC_CommonBitMatrix* image,
+ int32_t initSize,
+ int32_t x,
+ int32_t y) {
+ m_image = image;
+ m_height = image->GetHeight();
+ m_width = image->GetWidth();
+ int32_t halfsize = initSize >> 1;
+ m_leftInit = x - halfsize;
+ m_rightInit = x + halfsize;
+ m_upInit = y - halfsize;
+ m_downInit = y + halfsize;
+}
+CBC_WhiteRectangleDetector::~CBC_WhiteRectangleDetector() {}
+CFX_PtrArray* CBC_WhiteRectangleDetector::Detect(int32_t& e) {
+ int32_t left = m_leftInit;
+ int32_t right = m_rightInit;
+ int32_t up = m_upInit;
+ int32_t down = m_downInit;
+ FX_BOOL sizeExceeded = FALSE;
+ FX_BOOL aBlackPointFoundOnBorder = TRUE;
+ FX_BOOL atLeastOneBlackPointFoundOnBorder = FALSE;
+ while (aBlackPointFoundOnBorder) {
+ aBlackPointFoundOnBorder = FALSE;
+ FX_BOOL rightBorderNotWhite = TRUE;
+ while (rightBorderNotWhite && right < m_width) {
+ rightBorderNotWhite = ContainsBlackPoint(up, down, right, FALSE);
+ if (rightBorderNotWhite) {
+ right++;
+ aBlackPointFoundOnBorder = TRUE;
+ }
+ }
+ if (right >= m_width) {
+ sizeExceeded = TRUE;
+ break;
+ }
+ FX_BOOL bottomBorderNotWhite = TRUE;
+ while (bottomBorderNotWhite && down < m_height) {
+ bottomBorderNotWhite = ContainsBlackPoint(left, right, down, TRUE);
+ if (bottomBorderNotWhite) {
+ down++;
+ aBlackPointFoundOnBorder = TRUE;
+ }
+ }
+ if (down >= m_height) {
+ sizeExceeded = TRUE;
+ break;
+ }
+ FX_BOOL leftBorderNotWhite = TRUE;
+ while (leftBorderNotWhite && left >= 0) {
+ leftBorderNotWhite = ContainsBlackPoint(up, down, left, FALSE);
+ if (leftBorderNotWhite) {
+ left--;
+ aBlackPointFoundOnBorder = TRUE;
+ }
+ }
+ if (left < 0) {
+ sizeExceeded = TRUE;
+ break;
+ }
+ FX_BOOL topBorderNotWhite = TRUE;
+ while (topBorderNotWhite && up >= 0) {
+ topBorderNotWhite = ContainsBlackPoint(left, right, up, TRUE);
+ if (topBorderNotWhite) {
+ up--;
+ aBlackPointFoundOnBorder = TRUE;
+ }
+ }
+ if (up < 0) {
+ sizeExceeded = TRUE;
+ break;
+ }
+ if (aBlackPointFoundOnBorder) {
+ atLeastOneBlackPointFoundOnBorder = TRUE;
+ }
+ }
+ if (!sizeExceeded && atLeastOneBlackPointFoundOnBorder) {
+ int32_t maxSize = right - left;
+ std::unique_ptr<CBC_ResultPoint> z;
+ for (int32_t i = 1; i < maxSize; i++) {
+ z.reset(GetBlackPointOnSegment((FX_FLOAT)left, (FX_FLOAT)(down - i),
+ (FX_FLOAT)(left + i), (FX_FLOAT)(down)));
+ if (z)
+ break;
+ }
+ if (z.get() == NULL) {
+ e = BCExceptionNotFound;
+ BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+ }
+ std::unique_ptr<CBC_ResultPoint> t;
+ for (int32_t j = 1; j < maxSize; j++) {
+ t.reset(GetBlackPointOnSegment((FX_FLOAT)left, (FX_FLOAT)(up + j),
+ (FX_FLOAT)(left + j), (FX_FLOAT)up));
+ if (t)
+ break;
+ }
+ if (t.get() == NULL) {
+ e = BCExceptionNotFound;
+ BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+ }
+ std::unique_ptr<CBC_ResultPoint> x;
+ for (int32_t k = 1; k < maxSize; k++) {
+ x.reset(GetBlackPointOnSegment((FX_FLOAT)right, (FX_FLOAT)(up + k),
+ (FX_FLOAT)(right - k), (FX_FLOAT)up));
+ if (x)
+ break;
+ }
+ if (x.get() == NULL) {
+ e = BCExceptionNotFound;
+ BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+ }
+ std::unique_ptr<CBC_ResultPoint> y;
+ for (int32_t m = 1; m < maxSize; m++) {
+ y.reset(GetBlackPointOnSegment((FX_FLOAT)right, (FX_FLOAT)(down - m),
+ (FX_FLOAT)(right - m), (FX_FLOAT)down));
+ if (y)
+ break;
+ }
+ if (y.get() == NULL) {
+ e = BCExceptionNotFound;
+ BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+ }
+ return CenterEdges(y.get(), z.get(), x.get(), t.get());
+ } else {
+ e = BCExceptionNotFound;
+ BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+ }
+ return NULL;
+}
+int32_t CBC_WhiteRectangleDetector::Round(FX_FLOAT d) {
+ return (int32_t)(d + 0.5f);
+}
+CBC_ResultPoint* CBC_WhiteRectangleDetector::GetBlackPointOnSegment(
+ FX_FLOAT aX,
+ FX_FLOAT aY,
+ FX_FLOAT bX,
+ FX_FLOAT bY) {
+ int32_t dist = DistanceL2(aX, aY, bX, bY);
+ float xStep = (bX - aX) / dist;
+ float yStep = (bY - aY) / dist;
+ for (int32_t i = 0; i < dist; i++) {
+ int32_t x = Round(aX + i * xStep);
+ int32_t y = Round(aY + i * yStep);
+ if (m_image->Get(x, y)) {
+ return new CBC_ResultPoint((FX_FLOAT)x, (FX_FLOAT)y);
+ }
+ }
+ return NULL;
+}
+int32_t CBC_WhiteRectangleDetector::DistanceL2(FX_FLOAT aX,
+ FX_FLOAT aY,
+ FX_FLOAT bX,
+ FX_FLOAT bY) {
+ float xDiff = aX - bX;
+ float yDiff = aY - bY;
+ return Round((float)sqrt(xDiff * xDiff + yDiff * yDiff));
+}
+CFX_PtrArray* CBC_WhiteRectangleDetector::CenterEdges(CBC_ResultPoint* y,
+ CBC_ResultPoint* z,
+ CBC_ResultPoint* x,
+ CBC_ResultPoint* t) {
+ float yi = y->GetX();
+ float yj = y->GetY();
+ float zi = z->GetX();
+ float zj = z->GetY();
+ float xi = x->GetX();
+ float xj = x->GetY();
+ float ti = t->GetX();
+ float tj = t->GetY();
+ if (yi < m_width / 2) {
+ CFX_PtrArray* result = new CFX_PtrArray;
+ result->SetSize(4);
+ (*result)[0] = new CBC_ResultPoint(ti - CORR, tj + CORR);
+ (*result)[1] = new CBC_ResultPoint(zi + CORR, zj + CORR);
+ (*result)[2] = new CBC_ResultPoint(xi - CORR, xj - CORR);
+ (*result)[3] = new CBC_ResultPoint(yi + CORR, yj - CORR);
+ return result;
+ } else {
+ CFX_PtrArray* result = new CFX_PtrArray;
+ result->SetSize(4);
+ (*result)[0] = new CBC_ResultPoint(ti + CORR, tj + CORR);
+ (*result)[1] = new CBC_ResultPoint(zi + CORR, zj - CORR);
+ (*result)[2] = new CBC_ResultPoint(xi - CORR, xj + CORR);
+ (*result)[3] = new CBC_ResultPoint(yi - CORR, yj - CORR);
+ return result;
+ }
+}
+FX_BOOL CBC_WhiteRectangleDetector::ContainsBlackPoint(int32_t a,
+ int32_t b,
+ int32_t fixed,
+ FX_BOOL horizontal) {
+ if (horizontal) {
+ for (int32_t x = a; x <= b; x++) {
+ if (m_image->Get(x, fixed)) {
+ return TRUE;
+ }
+ }
+ } else {
+ for (int32_t y = a; y <= b; y++) {
+ if (m_image->Get(fixed, y)) {
+ return TRUE;
+ }
+ }
+ }
+ return FALSE;
+}