C++ changes for r2294

git-svn-id: https://zxing.googlecode.com/svn/trunk@2332 59b500cc-1b3d-0410-9834-0bbf25fbcc57

cpp/core/src/zxing/ResultPoint.cpp

@@ -1,3 +1,4 @@
+// -*- mode:c++; tab-width:2; indent-tabs-mode:nil; c-basic-offset:2 -*-
 /*
  *  ResultPoint.cpp
  *  zxing
@@ -19,7 +20,9 @@
  */
 
 #include <zxing/ResultPoint.h>
-#include <math.h>
+#include <zxing/common/detector/math_utils.h>
+
+namespace math_utils = zxing::common::detector::math_utils;
 
 namespace zxing {
 
@@ -82,8 +85,11 @@ void ResultPoint::orderBestPatterns(std::vector<Ref<ResultPoint> > &patterns) {
     patterns[2] = pointC;
 }
 
-float ResultPoint::distance(Ref<ResultPoint> point1, Ref<ResultPoint> point2) {
-  return distance(point1->getX(), point1->getY(), point2->getX(), point2->getY());
+  float ResultPoint::distance(Ref<ResultPoint> pattern1, Ref<ResultPoint> pattern2) {
+  return math_utils::distance(pattern1->posX_,
+                              pattern1->posY_,
+                              pattern2->posX_,
+                              pattern2->posY_);
 }
 
 float ResultPoint::distance(float x1, float x2, float y1, float y2) {

cpp/core/src/zxing/aztec/detector/Detector.cpp

@@ -26,7 +26,7 @@
 #include <zxing/common/reedsolomon/ReedSolomonException.h>
 #include <zxing/common/reedsolomon/GenericGF.h>
 #include <iostream>
-#include <cmath>
+#include <zxing/common/detector/math_utils.h>
 #include <zxing/NotFoundException.h>
 
 using zxing::aztec::Detector;
@@ -36,6 +36,7 @@ using zxing::Ref;
 using zxing::ResultPoint;
 using zxing::BitArray;
 using zxing::BitMatrix;
+namespace math_utils = zxing::common::detector::math_utils;
                 
 Detector::Detector(Ref<BitMatrix> image):
   image_(image),
@@ -136,21 +137,21 @@ std::vector<Ref<ResultPoint> > Detector::getMatrixCornerPoints(std::vector<Ref<P
   int dy = bullEyeCornerPoints[0]->y - bullEyeCornerPoints[2]->y;
   dy += dy > 0 ? 1 : -1;
             
-  int targetcx = ROUND(bullEyeCornerPoints[2]->x - ratio * dx);
-  int targetcy = ROUND(bullEyeCornerPoints[2]->y - ratio * dy);
+  int targetcx = math_utils::round(bullEyeCornerPoints[2]->x - ratio * dx);
+  int targetcy = math_utils::round(bullEyeCornerPoints[2]->y - ratio * dy);
             
-  int targetax = ROUND(bullEyeCornerPoints[0]->x + ratio * dx);
-  int targetay = ROUND(bullEyeCornerPoints[0]->y + ratio * dy);
+  int targetax = math_utils::round(bullEyeCornerPoints[0]->x + ratio * dx);
+  int targetay = math_utils::round(bullEyeCornerPoints[0]->y + ratio * dy);
             
   dx = bullEyeCornerPoints[1]->x - bullEyeCornerPoints[3]->x;
   dx += dx > 0 ? 1 : -1;
   dy = bullEyeCornerPoints[1]->y - bullEyeCornerPoints[3]->y;
   dy += dy > 0 ? 1 : -1;
             
-  int targetdx = ROUND(bullEyeCornerPoints[3]->x - ratio * dx);
-  int targetdy = ROUND(bullEyeCornerPoints[3]->y - ratio * dy);
-  int targetbx = ROUND(bullEyeCornerPoints[1]->x + ratio * dx);
-  int targetby = ROUND(bullEyeCornerPoints[1]->y + ratio * dy);
+  int targetdx = math_utils::round(bullEyeCornerPoints[3]->x - ratio * dx);
+  int targetdy = math_utils::round(bullEyeCornerPoints[3]->y - ratio * dy);
+  int targetbx = math_utils::round(bullEyeCornerPoints[1]->x + ratio * dx);
+  int targetby = math_utils::round(bullEyeCornerPoints[1]->y + ratio * dy);
             
   if (!isValid(targetax, targetay) ||
       !isValid(targetbx, targetby) ||
@@ -262,18 +263,18 @@ std::vector<Ref<Point> > Detector::getBullEyeCornerPoints(Ref<zxing::aztec::Poin
   int dx = pina->x - pind->x;
   int dy = pina->y - pinc->y;
             
-  int targetcx = ROUND(pinc->x - ratio * dx);
-  int targetcy = ROUND(pinc->y - ratio * dy);
-  int targetax = ROUND(pina->x + ratio * dx);
-  int targetay = ROUND(pina->y + ratio * dy);
+  int targetcx = math_utils::round(pinc->x - ratio * dx);
+  int targetcy = math_utils::round(pinc->y - ratio * dy);
+  int targetax = math_utils::round(pina->x + ratio * dx);
+  int targetay = math_utils::round(pina->y + ratio * dy);
             
   dx = pinb->x - pind->x;
   dy = pinb->y - pind->y;
             
-  int targetdx = ROUND(pind->x - ratio * dx);
-  int targetdy = ROUND(pind->y - ratio * dy);
-  int targetbx = ROUND(pinb->x + ratio * dx);
-  int targetby = ROUND(pinb->y + ratio * dy);
+  int targetdx = math_utils::round(pind->x - ratio * dx);
+  int targetdy = math_utils::round(pind->y - ratio * dy);
+  int targetbx = math_utils::round(pinb->x + ratio * dx);
+  int targetby = math_utils::round(pinb->y + ratio * dy);
             
   if (!isValid(targetax, targetay) ||
       !isValid(targetbx, targetby) ||
@@ -314,8 +315,8 @@ Ref<Point> Detector::getMatrixCenter() {
                                       
   }
             
-  int cx = ROUND((pointA->getX() + pointD->getX() + pointB->getX() + pointC->getX()) / 4);
-  int cy = ROUND((pointA->getY() + pointD->getY() + pointB->getY() + pointC->getY()) / 4);
+  int cx = math_utils::round((pointA->getX() + pointD->getX() + pointB->getX() + pointC->getX()) / 4);
+  int cy = math_utils::round((pointA->getY() + pointD->getY() + pointB->getY() + pointC->getY()) / 4);
             
   try {
                 
@@ -334,8 +335,8 @@ Ref<Point> Detector::getMatrixCenter() {
                 
   }
             
-  cx = ROUND((pointA->getX() + pointD->getX() + pointB->getX() + pointC->getX()) / 4);
-  cy = ROUND((pointA->getY() + pointD->getY() + pointB->getY() + pointC->getY()) / 4);
+  cx = math_utils::round((pointA->getX() + pointD->getX() + pointB->getX() + pointC->getX()) / 4);
+  cy = math_utils::round((pointA->getY() + pointD->getY() + pointB->getY() + pointC->getY()) / 4);
             
   return Ref<Point>(new Point(cx, cy));
             
@@ -424,7 +425,7 @@ Ref<BitArray> Detector::sampleLine(Ref<zxing::aztec::Point> p1, Ref<zxing::aztec
   float py = p1->y;
             
   for (int i = 0; i < size; i++) {
-    if (image_->get(ROUND(px), ROUND(py))) res->set(i);
+    if (image_->get(math_utils::round(px), math_utils::round(py))) res->set(i);
     px += dx;
     py += dy;
   }
@@ -486,7 +487,7 @@ int Detector::getColor(Ref<zxing::aztec::Point> p1, Ref<zxing::aztec::Point> p2)
   for (int i = 0; i < d; i++) {
     px += dx;
     py += dy;
-    if (image_->get(ROUND(px), ROUND(py)) != colorModel) {
+    if (image_->get(math_utils::round(px), math_utils::round(py)) != colorModel) {
       error ++;
     }
   }

cpp/core/src/zxing/aztec/detector/Detector.h

@@ -28,8 +28,6 @@
 #include <zxing/DecodeHints.h>
 #include <zxing/aztec/AztecDetectorResult.h>
 
-#define ROUND(a) ((int)(a + 0.5f))
-
 namespace zxing {
     namespace aztec {
         

cpp/core/src/zxing/common/detector/WhiteRectangleDetector.cpp

@@ -1,3 +1,4 @@
+// -*- mode:c++; tab-width:2; indent-tabs-mode:nil; c-basic-offset:2 -*-
 /*
  *  WhiteRectangleDetector.cpp
  *  y_wmk
@@ -20,9 +21,11 @@
 
 #include <zxing/NotFoundException.h>
 #include <zxing/common/detector/WhiteRectangleDetector.h>
-#include <math.h>
+#include <zxing/common/detector/math_utils.h>
 #include <sstream>
 
+namespace math_utils = zxing::common::detector::math_utils;
+
 namespace zxing {
 using namespace std;
 
@@ -222,21 +225,14 @@ std::vector<Ref<ResultPoint> > WhiteRectangleDetector::detect() {
   }
 }
 
-/**
- * Ends up being a bit faster than Math.round(). This merely rounds its
- * argument to the nearest int, where x.5 rounds up.
- */
-int WhiteRectangleDetector::round(float d) {
-  return (int) (d + 0.5f);
-}
-
 Ref<ResultPoint> WhiteRectangleDetector::getBlackPointOnSegment(float aX, float aY, float bX, float bY) {
-  int dist = distanceL2(aX, aY, bX, bY);
+  int dist = math_utils::round(math_utils::distance(aX, aY, bX, bY));
   float xStep = (bX - aX) / dist;
   float yStep = (bY - aY) / dist;
+
   for (int i = 0; i < dist; i++) {
-    int x = round(aX + i * xStep);
-    int y = round(aY + i * yStep);
+    int x = math_utils::round(aX + i * xStep);
+    int y = math_utils::round(aY + i * yStep);
     if (image_->get(x, y)) {
       Ref<ResultPoint> point(new ResultPoint(x, y));
       return point;
@@ -246,12 +242,6 @@ Ref<ResultPoint> WhiteRectangleDetector::getBlackPointOnSegment(float aX, float
   return point;
 }
 
-int WhiteRectangleDetector::distanceL2(float aX, float aY, float bX, float bY) {
-  float xDiff = aX - bX;
-  float yDiff = aY - bY;
-  return round((float)sqrt(xDiff * xDiff + yDiff * yDiff));
-}
-
 /**
  * recenters the points of a constant distance towards the center
  *

cpp/core/src/zxing/common/detector/WhiteRectangleDetector.h

@@ -49,9 +49,7 @@ class WhiteRectangleDetector : public Counted {
     std::vector<Ref<ResultPoint> > detect();
 
   private: 
-    int round(float a);
     Ref<ResultPoint> getBlackPointOnSegment(float aX, float aY, float bX, float bY);
-    int distanceL2(float aX, float aY, float bX, float bY);
     std::vector<Ref<ResultPoint> > centerEdges(Ref<ResultPoint> y, Ref<ResultPoint> z,
                                     Ref<ResultPoint> x, Ref<ResultPoint> t);
     bool containsBlackPoint(int a, int b, int fixed, bool horizontal);

cpp/core/src/zxing/common/detector/math_utils.h

@@ -0,0 +1,46 @@
+// -*- mode:c++; tab-width:2; indent-tabs-mode:nil; c-basic-offset:2 -*-
+#ifndef __ZXING_COMMON_DETECTOR_MATHUTILS_H__
+#define __ZXING_COMMON_DETECTOR_MATHUTILS_H__
+/*
+ *  Copyright 2012 ZXing authors All rights reserved.
+ *
+ * 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 <math.h>
+
+namespace zxing { namespace common { namespace detector { namespace math_utils {
+
+/**
+ * Ends up being a bit faster than {@link Math#round(float)}. This merely rounds its
+ * argument to the nearest int, where x.5 rounds up to x+1.
+ */
+inline int round(float d) {
+  return (int) (d + 0.5f);
+}
+
+inline float distance(float aX, float aY, float bX, float bY) {
+  float xDiff = aX - bX;
+  float yDiff = aY - bY;
+  return (float) sqrt(xDiff * xDiff + yDiff * yDiff);
+}
+
+inline float distance(int aX, int aY, int bX, int bY) {
+  int xDiff = aX - bX;
+  int yDiff = aY - bY;
+  return (float) sqrt(xDiff * xDiff + yDiff * yDiff);
+}
+
+}}}}
+
+#endif

cpp/core/src/zxing/datamatrix/detector/Detector.cpp

@@ -22,10 +22,12 @@
 #include <zxing/ResultPoint.h>
 #include <zxing/common/GridSampler.h>
 #include <zxing/datamatrix/detector/Detector.h>
-#include <cmath>
+#include <zxing/common/detector/math_utils.h>
 #include <sstream>
 #include <cstdlib>
 
+namespace math_utils = zxing::common::detector::math_utils;
+
 namespace zxing {
 namespace datamatrix {
 
@@ -327,12 +329,8 @@ bool Detector::isValid(Ref<ResultPoint> p) {
       && p->getY() < image_->getHeight();
 }
 
-// L2 distance
 int Detector::distance(Ref<ResultPoint> a, Ref<ResultPoint> b) {
-  return round(
-      (float) sqrt(
-          (double) (a->getX() - b->getX()) * (a->getX() - b->getX())
-              + (a->getY() - b->getY()) * (a->getY() - b->getY())));
+  return math_utils::round(ResultPoint::distance(a, b));
 }
 
 Ref<ResultPointsAndTransitions> Detector::transitionsBetween(Ref<ResultPoint> from,

cpp/core/src/zxing/qrcode/detector/Detector.cpp

@@ -27,10 +27,12 @@
 #include <zxing/qrcode/Version.h>
 #include <zxing/common/GridSampler.h>
 #include <zxing/DecodeHints.h>
-#include <cmath>
+#include <zxing/common/detector/math_utils.h>
 #include <sstream>
 #include <cstdlib>
 
+namespace math_utils = zxing::common::detector::math_utils;
+
 namespace zxing {
 namespace qrcode {
 
@@ -145,8 +147,10 @@ Ref<BitMatrix> Detector::sampleGrid(Ref<BitMatrix> image, int dimension, Ref<Per
 
 int Detector::computeDimension(Ref<ResultPoint> topLeft, Ref<ResultPoint> topRight, Ref<ResultPoint> bottomLeft,
                                float moduleSize) {
-  int tltrCentersDimension = int(FinderPatternFinder::distance(topLeft, topRight) / moduleSize + 0.5f);
-  int tlblCentersDimension = int(FinderPatternFinder::distance(topLeft, bottomLeft) / moduleSize + 0.5f);
+  int tltrCentersDimension =
+    math_utils::round(ResultPoint::distance(topLeft, topRight) / moduleSize);
+  int tlblCentersDimension =
+    math_utils::round(ResultPoint::distance(topLeft, bottomLeft) / moduleSize);
   int dimension = ((tltrCentersDimension + tlblCentersDimension) >> 1) + 7;
   switch (dimension & 0x03) { // mod 4
   case 0:
@@ -247,9 +251,7 @@ float Detector::sizeOfBlackWhiteBlackRun(int fromX, int fromY, int toX, int toY)
       // Does current pixel mean we have moved white to black or vice versa?
       if (!((state == 1) ^ image_->get(realX, realY))) {
         if (state == 2) {
-          int diffX = x - fromX;
-          int diffY = y - fromY;
-          return (float) sqrt((double) (diffX * diffX + diffY * diffY));
+          return math_utils::distance(x, y, fromX, fromY);
         }
         state++;
       }
@@ -267,9 +269,7 @@ float Detector::sizeOfBlackWhiteBlackRun(int fromX, int fromY, int toX, int toY)
     // is "white" so this last point at (toX+xStep,toY) is the right ending. This is really a
     // small approximation; (toX+xStep,toY+yStep) might be really correct. Ignore this.
     if (state == 2) {
-      int diffX = toX + xstep - fromX;
-      int diffY = toY - fromY;
-      return (float) sqrt((double) (diffX * diffX + diffY * diffY));
+      return math_utils::distance(toX + xstep, toY, fromX, fromY);
     }
     // else we didn't find even black-white-black; no estimate is really possible
     return NAN;