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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/qrcode/BC_QRAlignmentPatternFinder.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/qrcode/BC_QRAlignmentPatternFinder.cpp')
-rw-r--r--xfa/fxbarcode/qrcode/BC_QRAlignmentPatternFinder.cpp200
1 files changed, 200 insertions, 0 deletions
diff --git a/xfa/fxbarcode/qrcode/BC_QRAlignmentPatternFinder.cpp b/xfa/fxbarcode/qrcode/BC_QRAlignmentPatternFinder.cpp
new file mode 100644
index 0000000000..8c462bf328
--- /dev/null
+++ b/xfa/fxbarcode/qrcode/BC_QRAlignmentPatternFinder.cpp
@@ -0,0 +1,200 @@
+// 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/BC_ResultPoint.h"
+#include "xfa/fxbarcode/common/BC_CommonBitMatrix.h"
+#include "xfa/fxbarcode/qrcode/BC_QRAlignmentPattern.h"
+#include "xfa/fxbarcode/qrcode/BC_QRAlignmentPatternFinder.h"
+
+CBC_QRAlignmentPatternFinder::CBC_QRAlignmentPatternFinder(
+ CBC_CommonBitMatrix* image,
+ int32_t startX,
+ int32_t startY,
+ int32_t width,
+ int32_t height,
+ FX_FLOAT moduleSize)
+ : m_image(image),
+ m_startX(startX),
+ m_startY(startY),
+ m_width(width),
+ m_height(height),
+ m_moduleSize(moduleSize) {
+ m_crossCheckStateCount.SetSize(3);
+}
+CBC_QRAlignmentPatternFinder::~CBC_QRAlignmentPatternFinder() {
+ for (int32_t i = 0; i < m_possibleCenters.GetSize(); i++) {
+ delete (CBC_QRAlignmentPattern*)m_possibleCenters[i];
+ }
+ m_possibleCenters.RemoveAll();
+}
+CBC_QRAlignmentPattern* CBC_QRAlignmentPatternFinder::Find(int32_t& e) {
+ int32_t startX = m_startX;
+ int32_t height = m_height;
+ int32_t maxJ = startX + m_width;
+ int32_t middleI = m_startY + (height >> 1);
+ CFX_Int32Array stateCount;
+ stateCount.SetSize(3);
+ for (int32_t iGen = 0; iGen < height; iGen++) {
+ int32_t i =
+ middleI + ((iGen & 0x01) == 0 ? ((iGen + 1) >> 1) : -((iGen + 1) >> 1));
+ stateCount[0] = 0;
+ stateCount[1] = 0;
+ stateCount[2] = 0;
+ int32_t j = startX;
+ while (j < maxJ && !m_image->Get(j, i)) {
+ j++;
+ }
+ int32_t currentState = 0;
+ while (j < maxJ) {
+ if (m_image->Get(j, i)) {
+ if (currentState == 1) {
+ stateCount[currentState]++;
+ } else {
+ if (currentState == 2) {
+ if (FoundPatternCross(stateCount)) {
+ CBC_QRAlignmentPattern* confirmed =
+ HandlePossibleCenter(stateCount, i, j);
+ if (confirmed) {
+ return confirmed;
+ }
+ }
+ stateCount[0] = stateCount[2];
+ stateCount[1] = 1;
+ stateCount[2] = 0;
+ currentState = 1;
+ } else {
+ stateCount[++currentState]++;
+ }
+ }
+ } else {
+ if (currentState == 1) {
+ currentState++;
+ }
+ stateCount[currentState]++;
+ }
+ j++;
+ }
+ if (FoundPatternCross(stateCount)) {
+ CBC_QRAlignmentPattern* confirmed =
+ HandlePossibleCenter(stateCount, i, maxJ);
+ if (confirmed) {
+ return confirmed;
+ }
+ }
+ }
+ if (m_possibleCenters.GetSize() != 0) {
+ return ((CBC_QRAlignmentPattern*)(m_possibleCenters[0]))->Clone();
+ }
+ e = BCExceptionRead;
+ BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+ return NULL;
+}
+FX_FLOAT CBC_QRAlignmentPatternFinder::CenterFromEnd(
+ const CFX_Int32Array& stateCount,
+ int32_t end) {
+ return (FX_FLOAT)(end - stateCount[2]) - stateCount[1] / 2.0f;
+}
+FX_BOOL CBC_QRAlignmentPatternFinder::FoundPatternCross(
+ const CFX_Int32Array& stateCount) {
+ FX_FLOAT moduleSize = m_moduleSize;
+ FX_FLOAT maxVariance = moduleSize / 2.0f;
+ for (int32_t i = 0; i < 3; i++) {
+ if (fabs(moduleSize - stateCount[i]) >= maxVariance) {
+ return false;
+ }
+ }
+ return TRUE;
+}
+FX_FLOAT CBC_QRAlignmentPatternFinder::CrossCheckVertical(
+ int32_t startI,
+ int32_t centerJ,
+ int32_t maxCount,
+ int32_t originalStateCountTotal) {
+ int32_t maxI = m_image->GetHeight();
+ CFX_Int32Array stateCount;
+ stateCount.Copy(m_crossCheckStateCount);
+ stateCount[0] = 0;
+ stateCount[1] = 0;
+ stateCount[2] = 0;
+ int32_t i = startI;
+ while (i >= 0 && m_image->Get(centerJ, i) && stateCount[1] <= maxCount) {
+ stateCount[1]++;
+ i--;
+ }
+ if (i < 0 || stateCount[1] > maxCount) {
+ return FXSYS_nan();
+ }
+ while (i >= 0 && !m_image->Get(centerJ, i) && stateCount[0] <= maxCount) {
+ stateCount[0]++;
+ i--;
+ }
+ if (stateCount[0] > maxCount) {
+ return FXSYS_nan();
+ }
+ i = startI + 1;
+ while (i < maxI && m_image->Get(centerJ, i) && stateCount[1] <= maxCount) {
+ stateCount[1]++;
+ i++;
+ }
+ if (i == maxI || stateCount[1] > maxCount) {
+ return FXSYS_nan();
+ }
+ while (i < maxI && !m_image->Get(centerJ, i) && stateCount[2] <= maxCount) {
+ stateCount[2]++;
+ i++;
+ }
+ if (stateCount[2] > maxCount) {
+ return FXSYS_nan();
+ }
+ int32_t stateCountTotal = stateCount[0] + stateCount[1] + stateCount[2];
+ if (5 * abs(stateCountTotal - originalStateCountTotal) >=
+ originalStateCountTotal) {
+ return FXSYS_nan();
+ }
+ return FoundPatternCross(stateCount) ? CenterFromEnd(stateCount, i)
+ : FXSYS_nan();
+}
+CBC_QRAlignmentPattern* CBC_QRAlignmentPatternFinder::HandlePossibleCenter(
+ const CFX_Int32Array& stateCount,
+ int32_t i,
+ int32_t j) {
+ int32_t stateCountTotal = stateCount[0] + stateCount[1] + stateCount[2];
+ FX_FLOAT centerJ = CenterFromEnd(stateCount, j);
+ FX_FLOAT centerI = CrossCheckVertical(i, (int32_t)centerJ, 2 * stateCount[1],
+ stateCountTotal);
+ if (!FXSYS_isnan(centerI)) {
+ FX_FLOAT estimatedModuleSize =
+ (FX_FLOAT)(stateCount[0] + stateCount[1] + stateCount[2]) / 3.0f;
+ int32_t max = m_possibleCenters.GetSize();
+ for (int32_t index = 0; index < max; index++) {
+ CBC_QRAlignmentPattern* center =
+ (CBC_QRAlignmentPattern*)(m_possibleCenters[index]);
+ if (center->AboutEquals(estimatedModuleSize, centerI, centerJ)) {
+ return new CBC_QRAlignmentPattern(centerJ, centerI,
+ estimatedModuleSize);
+ }
+ }
+ m_possibleCenters.Add(
+ new CBC_QRAlignmentPattern(centerJ, centerI, estimatedModuleSize));
+ }
+ return NULL;
+}