Move CFX_ClipRgn and CFX_PathData into their own files.

This is the second CL in an attempt to split up the classes in fxge/include/fx_ge.h into their own files. CFX_ClipRgn is moved to core/fxge/ge because it is only used in core/fxge. The header for CFX_PathData is left in core/fxge/include since it is used elsewhere.

Review-Url: https://codereview.chromium.org/2216853004

1 files changed, 533 insertions, 0 deletions

diff --git a/core/fxge/ge/cfx_pathdata.cpp b/core/fxge/ge/cfx_pathdata.cpp
new file mode 100644
index 0000000000..66792642f9
--- /dev/null
+++ b/core/fxge/ge/cfx_pathdata.cpp
@@ -0,0 +1,533 @@
+// Copyright 2016 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
+
+#include "core/fxge/include/cfx_pathdata.h"
+
+#include "core/fxcrt/include/fx_system.h"
+#include "core/fxge/include/fx_ge.h"
+#include "third_party/base/numerics/safe_math.h"
+
+CFX_PathData::CFX_PathData()
+    : m_PointCount(0), m_pPoints(nullptr), m_AllocCount(0) {}
+
+CFX_PathData::~CFX_PathData() {
+  FX_Free(m_pPoints);
+}
+
+void CFX_PathData::SetPointCount(int nPoints) {
+  m_PointCount = nPoints;
+  if (m_AllocCount < nPoints) {
+    FX_Free(m_pPoints);
+    m_pPoints = FX_Alloc(FX_PATHPOINT, nPoints);
+    m_AllocCount = nPoints;
+  }
+}
+
+void CFX_PathData::AllocPointCount(int nPoints) {
+  if (m_AllocCount < nPoints) {
+    FX_PATHPOINT* pNewBuf = FX_Alloc(FX_PATHPOINT, nPoints);
+    if (m_PointCount) {
+      FXSYS_memcpy(pNewBuf, m_pPoints, m_PointCount * sizeof(FX_PATHPOINT));
+    }
+    FX_Free(m_pPoints);
+    m_pPoints = pNewBuf;
+    m_AllocCount = nPoints;
+  }
+}
+
+CFX_PathData::CFX_PathData(const CFX_PathData& src) {
+  m_PointCount = m_AllocCount = src.m_PointCount;
+  m_pPoints = FX_Alloc(FX_PATHPOINT, src.m_PointCount);
+  FXSYS_memcpy(m_pPoints, src.m_pPoints, sizeof(FX_PATHPOINT) * m_PointCount);
+}
+
+void CFX_PathData::TrimPoints(int nPoints) {
+  if (m_PointCount <= nPoints) {
+    return;
+  }
+  SetPointCount(nPoints);
+}
+
+void CFX_PathData::AddPointCount(int addPoints) {
+  pdfium::base::CheckedNumeric<int> safe_new_count = m_PointCount;
+  safe_new_count += addPoints;
+  int new_count = safe_new_count.ValueOrDie();
+  AllocPointCount(new_count);
+  m_PointCount = new_count;
+}
+
+void CFX_PathData::Append(const CFX_PathData* pSrc, const CFX_Matrix* pMatrix) {
+  int old_count = m_PointCount;
+  AddPointCount(pSrc->m_PointCount);
+  FXSYS_memcpy(m_pPoints + old_count, pSrc->m_pPoints,
+               pSrc->m_PointCount * sizeof(FX_PATHPOINT));
+  if (pMatrix) {
+    for (int i = 0; i < pSrc->m_PointCount; i++) {
+      pMatrix->Transform(m_pPoints[old_count + i].m_PointX,
+                         m_pPoints[old_count + i].m_PointY);
+    }
+  }
+}
+
+void CFX_PathData::SetPoint(int index, FX_FLOAT x, FX_FLOAT y, int flag) {
+  ASSERT(index < m_PointCount);
+  m_pPoints[index].m_PointX = x;
+  m_pPoints[index].m_PointY = y;
+  m_pPoints[index].m_Flag = flag;
+}
+
+void CFX_PathData::AppendRect(FX_FLOAT left,
+                              FX_FLOAT bottom,
+                              FX_FLOAT right,
+                              FX_FLOAT top) {
+  int old_count = m_PointCount;
+  AddPointCount(5);
+  FX_PATHPOINT* pPoints = m_pPoints + old_count;
+  pPoints[0].m_PointX = pPoints[1].m_PointX = pPoints[4].m_PointX = left;
+  pPoints[2].m_PointX = pPoints[3].m_PointX = right;
+  pPoints[0].m_PointY = pPoints[3].m_PointY = pPoints[4].m_PointY = bottom;
+  pPoints[1].m_PointY = pPoints[2].m_PointY = top;
+  pPoints[0].m_Flag = FXPT_MOVETO;
+  pPoints[1].m_Flag = pPoints[2].m_Flag = pPoints[3].m_Flag = FXPT_LINETO;
+  pPoints[4].m_Flag = FXPT_LINETO | FXPT_CLOSEFIGURE;
+}
+
+CFX_FloatRect CFX_PathData::GetBoundingBox() const {
+  CFX_FloatRect rect;
+  if (m_PointCount) {
+    rect.InitRect(m_pPoints[0].m_PointX, m_pPoints[0].m_PointY);
+    for (int i = 1; i < m_PointCount; i++) {
+      rect.UpdateRect(m_pPoints[i].m_PointX, m_pPoints[i].m_PointY);
+    }
+  }
+  return rect;
+}
+
+static void _UpdateLineEndPoints(CFX_FloatRect& rect,
+                                 FX_FLOAT start_x,
+                                 FX_FLOAT start_y,
+                                 FX_FLOAT end_x,
+                                 FX_FLOAT end_y,
+                                 FX_FLOAT hw) {
+  if (start_x == end_x) {
+    if (start_y == end_y) {
+      rect.UpdateRect(end_x + hw, end_y + hw);
+      rect.UpdateRect(end_x - hw, end_y - hw);
+      return;
+    }
+    FX_FLOAT point_y;
+    if (end_y < start_y) {
+      point_y = end_y - hw;
+    } else {
+      point_y = end_y + hw;
+    }
+    rect.UpdateRect(end_x + hw, point_y);
+    rect.UpdateRect(end_x - hw, point_y);
+    return;
+  }
+  if (start_y == end_y) {
+    FX_FLOAT point_x;
+    if (end_x < start_x) {
+      point_x = end_x - hw;
+    } else {
+      point_x = end_x + hw;
+    }
+    rect.UpdateRect(point_x, end_y + hw);
+    rect.UpdateRect(point_x, end_y - hw);
+    return;
+  }
+  FX_FLOAT dx = end_x - start_x;
+  FX_FLOAT dy = end_y - start_y;
+  FX_FLOAT ll = FXSYS_sqrt2(dx, dy);
+  FX_FLOAT mx = end_x + hw * dx / ll;
+  FX_FLOAT my = end_y + hw * dy / ll;
+  FX_FLOAT dx1 = hw * dy / ll;
+  FX_FLOAT dy1 = hw * dx / ll;
+  rect.UpdateRect(mx - dx1, my + dy1);
+  rect.UpdateRect(mx + dx1, my - dy1);
+}
+
+static void _UpdateLineJoinPoints(CFX_FloatRect& rect,
+                                  FX_FLOAT start_x,
+                                  FX_FLOAT start_y,
+                                  FX_FLOAT middle_x,
+                                  FX_FLOAT middle_y,
+                                  FX_FLOAT end_x,
+                                  FX_FLOAT end_y,
+                                  FX_FLOAT half_width,
+                                  FX_FLOAT miter_limit) {
+  FX_FLOAT start_k = 0, start_c = 0, end_k = 0, end_c = 0, start_len = 0,
+           start_dc = 0, end_len = 0, end_dc = 0;
+  FX_BOOL bStartVert = FXSYS_fabs(start_x - middle_x) < 1.0f / 20;
+  FX_BOOL bEndVert = FXSYS_fabs(middle_x - end_x) < 1.0f / 20;
+  if (bStartVert && bEndVert) {
+    int start_dir = middle_y > start_y ? 1 : -1;
+    FX_FLOAT point_y = middle_y + half_width * start_dir;
+    rect.UpdateRect(middle_x + half_width, point_y);
+    rect.UpdateRect(middle_x - half_width, point_y);
+    return;
+  }
+  if (!bStartVert) {
+    start_k = (middle_y - start_y) / (middle_x - start_x);
+    start_c = middle_y - (start_k * middle_x);
+    start_len = FXSYS_sqrt2(start_x - middle_x, start_y - middle_y);
+    start_dc =
+        (FX_FLOAT)FXSYS_fabs(half_width * start_len / (start_x - middle_x));
+  }
+  if (!bEndVert) {
+    end_k = (end_y - middle_y) / (end_x - middle_x);
+    end_c = middle_y - (end_k * middle_x);
+    end_len = FXSYS_sqrt2(end_x - middle_x, end_y - middle_y);
+    end_dc = (FX_FLOAT)FXSYS_fabs(half_width * end_len / (end_x - middle_x));
+  }
+  if (bStartVert) {
+    FX_FLOAT outside_x = start_x;
+    if (end_x < start_x) {
+      outside_x += half_width;
+    } else {
+      outside_x -= half_width;
+    }
+    FX_FLOAT outside_y;
+    if (start_y < (end_k * start_x) + end_c) {
+      outside_y = (end_k * outside_x) + end_c + end_dc;
+    } else {
+      outside_y = (end_k * outside_x) + end_c - end_dc;
+    }
+    rect.UpdateRect(outside_x, outside_y);
+    return;
+  }
+  if (bEndVert) {
+    FX_FLOAT outside_x = end_x;
+    if (start_x < end_x) {
+      outside_x += half_width;
+    } else {
+      outside_x -= half_width;
+    }
+    FX_FLOAT outside_y;
+    if (end_y < (start_k * end_x) + start_c) {
+      outside_y = (start_k * outside_x) + start_c + start_dc;
+    } else {
+      outside_y = (start_k * outside_x) + start_c - start_dc;
+    }
+    rect.UpdateRect(outside_x, outside_y);
+    return;
+  }
+  if (FXSYS_fabs(start_k - end_k) < 1.0f / 20) {
+    int start_dir = middle_x > start_x ? 1 : -1;
+    int end_dir = end_x > middle_x ? 1 : -1;
+    if (start_dir == end_dir) {
+      _UpdateLineEndPoints(rect, middle_x, middle_y, end_x, end_y, half_width);
+    } else {
+      _UpdateLineEndPoints(rect, start_x, start_y, middle_x, middle_y,
+                           half_width);
+    }
+    return;
+  }
+  FX_FLOAT start_outside_c = start_c;
+  if (end_y < (start_k * end_x) + start_c) {
+    start_outside_c += start_dc;
+  } else {
+    start_outside_c -= start_dc;
+  }
+  FX_FLOAT end_outside_c = end_c;
+  if (start_y < (end_k * start_x) + end_c) {
+    end_outside_c += end_dc;
+  } else {
+    end_outside_c -= end_dc;
+  }
+  FX_FLOAT join_x = (end_outside_c - start_outside_c) / (start_k - end_k);
+  FX_FLOAT join_y = (start_k * join_x) + start_outside_c;
+  rect.UpdateRect(join_x, join_y);
+}
+
+CFX_FloatRect CFX_PathData::GetBoundingBox(FX_FLOAT line_width,
+                                           FX_FLOAT miter_limit) const {
+  CFX_FloatRect rect(100000 * 1.0f, 100000 * 1.0f, -100000 * 1.0f,
+                     -100000 * 1.0f);
+  int iPoint = 0;
+  FX_FLOAT half_width = line_width;
+  int iStartPoint = 0;
+  int iEndPoint = 0;
+  int iMiddlePoint = 0;
+  FX_BOOL bJoin;
+  while (iPoint < m_PointCount) {
+    if (m_pPoints[iPoint].m_Flag == FXPT_MOVETO) {
+      iStartPoint = iPoint + 1;
+      iEndPoint = iPoint;
+      bJoin = FALSE;
+    } else {
+      if (m_pPoints[iPoint].m_Flag == FXPT_BEZIERTO) {
+        rect.UpdateRect(m_pPoints[iPoint].m_PointX, m_pPoints[iPoint].m_PointY);
+        rect.UpdateRect(m_pPoints[iPoint + 1].m_PointX,
+                        m_pPoints[iPoint + 1].m_PointY);
+        iPoint += 2;
+      }
+      if (iPoint == m_PointCount - 1 ||
+          m_pPoints[iPoint + 1].m_Flag == FXPT_MOVETO) {
+        iStartPoint = iPoint - 1;
+        iEndPoint = iPoint;
+        bJoin = FALSE;
+      } else {
+        iStartPoint = iPoint - 1;
+        iMiddlePoint = iPoint;
+        iEndPoint = iPoint + 1;
+        bJoin = TRUE;
+      }
+    }
+    FX_FLOAT start_x = m_pPoints[iStartPoint].m_PointX;
+    FX_FLOAT start_y = m_pPoints[iStartPoint].m_PointY;
+    FX_FLOAT end_x = m_pPoints[iEndPoint].m_PointX;
+    FX_FLOAT end_y = m_pPoints[iEndPoint].m_PointY;
+    if (bJoin) {
+      FX_FLOAT middle_x = m_pPoints[iMiddlePoint].m_PointX;
+      FX_FLOAT middle_y = m_pPoints[iMiddlePoint].m_PointY;
+      _UpdateLineJoinPoints(rect, start_x, start_y, middle_x, middle_y, end_x,
+                            end_y, half_width, miter_limit);
+    } else {
+      _UpdateLineEndPoints(rect, start_x, start_y, end_x, end_y, half_width);
+    }
+    iPoint++;
+  }
+  return rect;
+}
+
+void CFX_PathData::Transform(const CFX_Matrix* pMatrix) {
+  if (!pMatrix) {
+    return;
+  }
+  for (int i = 0; i < m_PointCount; i++) {
+    pMatrix->Transform(m_pPoints[i].m_PointX, m_pPoints[i].m_PointY);
+  }
+}
+
+FX_BOOL CFX_PathData::GetZeroAreaPath(CFX_PathData& NewPath,
+                                      CFX_Matrix* pMatrix,
+                                      FX_BOOL& bThin,
+                                      FX_BOOL bAdjust) const {
+  if (m_PointCount < 3) {
+    return FALSE;
+  }
+  if (m_PointCount == 3 && (m_pPoints[0].m_Flag & FXPT_TYPE) == FXPT_MOVETO &&
+      (m_pPoints[1].m_Flag & FXPT_TYPE) == FXPT_LINETO &&
+      (m_pPoints[2].m_Flag & FXPT_TYPE) == FXPT_LINETO &&
+      m_pPoints[0].m_PointX == m_pPoints[2].m_PointX &&
+      m_pPoints[0].m_PointY == m_pPoints[2].m_PointY) {
+    NewPath.AddPointCount(2);
+    if (bAdjust) {
+      if (pMatrix) {
+        FX_FLOAT x = m_pPoints[0].m_PointX, y = m_pPoints[0].m_PointY;
+        pMatrix->TransformPoint(x, y);
+        x = (int)x + 0.5f;
+        y = (int)y + 0.5f;
+        NewPath.SetPoint(0, x, y, FXPT_MOVETO);
+        x = m_pPoints[1].m_PointX, y = m_pPoints[1].m_PointY;
+        pMatrix->TransformPoint(x, y);
+        x = (int)x + 0.5f;
+        y = (int)y + 0.5f;
+        NewPath.SetPoint(1, x, y, FXPT_LINETO);
+        pMatrix->SetIdentity();
+      } else {
+        FX_FLOAT x = (int)m_pPoints[0].m_PointX + 0.5f,
+                 y = (int)m_pPoints[0].m_PointY + 0.5f;
+        NewPath.SetPoint(0, x, y, FXPT_MOVETO);
+        x = (int)m_pPoints[1].m_PointX + 0.5f,
+        y = (int)m_pPoints[1].m_PointY + 0.5f;
+        NewPath.SetPoint(1, x, y, FXPT_LINETO);
+      }
+    } else {
+      NewPath.SetPoint(0, m_pPoints[0].m_PointX, m_pPoints[0].m_PointY,
+                       FXPT_MOVETO);
+      NewPath.SetPoint(1, m_pPoints[1].m_PointX, m_pPoints[1].m_PointY,
+                       FXPT_LINETO);
+    }
+    if (m_pPoints[0].m_PointX != m_pPoints[1].m_PointX &&
+        m_pPoints[0].m_PointY != m_pPoints[1].m_PointY) {
+      bThin = TRUE;
+    }
+    return TRUE;
+  }
+  if (((m_PointCount > 3) && (m_PointCount % 2))) {
+    int mid = m_PointCount / 2;
+    FX_BOOL bZeroArea = FALSE;
+    CFX_PathData t_path;
+    for (int i = 0; i < mid; i++) {
+      if (!(m_pPoints[mid - i - 1].m_PointX ==
+                m_pPoints[mid + i + 1].m_PointX &&
+            m_pPoints[mid - i - 1].m_PointY ==
+                m_pPoints[mid + i + 1].m_PointY &&
+            ((m_pPoints[mid - i - 1].m_Flag & FXPT_TYPE) != FXPT_BEZIERTO &&
+             (m_pPoints[mid + i + 1].m_Flag & FXPT_TYPE) != FXPT_BEZIERTO))) {
+        bZeroArea = TRUE;
+        break;
+      }
+      int new_count = t_path.GetPointCount();
+      t_path.AddPointCount(2);
+      t_path.SetPoint(new_count, m_pPoints[mid - i].m_PointX,
+                      m_pPoints[mid - i].m_PointY, FXPT_MOVETO);
+      t_path.SetPoint(new_count + 1, m_pPoints[mid - i - 1].m_PointX,
+                      m_pPoints[mid - i - 1].m_PointY, FXPT_LINETO);
+    }
+    if (!bZeroArea) {
+      NewPath.Append(&t_path, nullptr);
+      bThin = TRUE;
+      return TRUE;
+    }
+  }
+  int stratPoint = 0;
+  int next = 0, i;
+  for (i = 0; i < m_PointCount; i++) {
+    int point_type = m_pPoints[i].m_Flag & FXPT_TYPE;
+    if (point_type == FXPT_MOVETO) {
+      stratPoint = i;
+    } else if (point_type == FXPT_LINETO) {
+      next = (i + 1 - stratPoint) % (m_PointCount - stratPoint) + stratPoint;
+      if ((m_pPoints[next].m_Flag & FXPT_TYPE) != FXPT_BEZIERTO &&
+          (m_pPoints[next].m_Flag & FXPT_TYPE) != FXPT_MOVETO) {
+        if ((m_pPoints[i - 1].m_PointX == m_pPoints[i].m_PointX &&
+             m_pPoints[i].m_PointX == m_pPoints[next].m_PointX) &&
+            ((m_pPoints[i].m_PointY - m_pPoints[i - 1].m_PointY) *
+                 (m_pPoints[i].m_PointY - m_pPoints[next].m_PointY) >
+             0)) {
+          int pre = i;
+          if (FXSYS_fabs(m_pPoints[i].m_PointY - m_pPoints[i - 1].m_PointY) <
+              FXSYS_fabs(m_pPoints[i].m_PointY - m_pPoints[next].m_PointY)) {
+            pre--;
+            next--;
+          }
+          int new_count = NewPath.GetPointCount();
+          NewPath.AddPointCount(2);
+          NewPath.SetPoint(new_count, m_pPoints[pre].m_PointX,
+                           m_pPoints[pre].m_PointY, FXPT_MOVETO);
+          NewPath.SetPoint(new_count + 1, m_pPoints[next].m_PointX,
+                           m_pPoints[next].m_PointY, FXPT_LINETO);
+        } else if ((m_pPoints[i - 1].m_PointY == m_pPoints[i].m_PointY &&
+                    m_pPoints[i].m_PointY == m_pPoints[next].m_PointY) &&
+                   ((m_pPoints[i].m_PointX - m_pPoints[i - 1].m_PointX) *
+                        (m_pPoints[i].m_PointX - m_pPoints[next].m_PointX) >
+                    0)) {
+          int pre = i;
+          if (FXSYS_fabs(m_pPoints[i].m_PointX - m_pPoints[i - 1].m_PointX) <
+              FXSYS_fabs(m_pPoints[i].m_PointX - m_pPoints[next].m_PointX)) {
+            pre--;
+            next--;
+          }
+          int new_count = NewPath.GetPointCount();
+          NewPath.AddPointCount(2);
+          NewPath.SetPoint(new_count, m_pPoints[pre].m_PointX,
+                           m_pPoints[pre].m_PointY, FXPT_MOVETO);
+          NewPath.SetPoint(new_count + 1, m_pPoints[next].m_PointX,
+                           m_pPoints[next].m_PointY, FXPT_LINETO);
+        } else if ((m_pPoints[i - 1].m_Flag & FXPT_TYPE) == FXPT_MOVETO &&
+                   (m_pPoints[next].m_Flag & FXPT_TYPE) == FXPT_LINETO &&
+                   m_pPoints[i - 1].m_PointX == m_pPoints[next].m_PointX &&
+                   m_pPoints[i - 1].m_PointY == m_pPoints[next].m_PointY &&
+                   m_pPoints[next].m_Flag & FXPT_CLOSEFIGURE) {
+          int new_count = NewPath.GetPointCount();
+          NewPath.AddPointCount(2);
+          NewPath.SetPoint(new_count, m_pPoints[i - 1].m_PointX,
+                           m_pPoints[i - 1].m_PointY, FXPT_MOVETO);
+          NewPath.SetPoint(new_count + 1, m_pPoints[i].m_PointX,
+                           m_pPoints[i].m_PointY, FXPT_LINETO);
+          bThin = TRUE;
+        }
+      }
+    } else if (point_type == FXPT_BEZIERTO) {
+      i += 2;
+      continue;
+    }
+  }
+  if (m_PointCount > 3 && NewPath.GetPointCount()) {
+    bThin = TRUE;
+  }
+  if (NewPath.GetPointCount() == 0) {
+    return FALSE;
+  }
+  return TRUE;
+}
+
+FX_BOOL CFX_PathData::IsRect() const {
+  if (m_PointCount != 5 && m_PointCount != 4) {
+    return FALSE;
+  }
+  if ((m_PointCount == 5 && (m_pPoints[0].m_PointX != m_pPoints[4].m_PointX ||
+                             m_pPoints[0].m_PointY != m_pPoints[4].m_PointY)) ||
+      (m_pPoints[0].m_PointX == m_pPoints[2].m_PointX &&
+       m_pPoints[0].m_PointY == m_pPoints[2].m_PointY) ||
+      (m_pPoints[1].m_PointX == m_pPoints[3].m_PointX &&
+       m_pPoints[1].m_PointY == m_pPoints[3].m_PointY)) {
+    return FALSE;
+  }
+  if (m_pPoints[0].m_PointX != m_pPoints[3].m_PointX &&
+      m_pPoints[0].m_PointY != m_pPoints[3].m_PointY) {
+    return FALSE;
+  }
+  for (int i = 1; i < 4; i++) {
+    if ((m_pPoints[i].m_Flag & FXPT_TYPE) != FXPT_LINETO) {
+      return FALSE;
+    }
+    if (m_pPoints[i].m_PointX != m_pPoints[i - 1].m_PointX &&
+        m_pPoints[i].m_PointY != m_pPoints[i - 1].m_PointY) {
+      return FALSE;
+    }
+  }
+  return m_PointCount == 5 || (m_pPoints[3].m_Flag & FXPT_CLOSEFIGURE);
+}
+
+FX_BOOL CFX_PathData::IsRect(const CFX_Matrix* pMatrix,
+                             CFX_FloatRect* pRect) const {
+  if (!pMatrix) {
+    if (!IsRect()) {
+      return FALSE;
+    }
+    if (pRect) {
+      pRect->left = m_pPoints[0].m_PointX;
+      pRect->right = m_pPoints[2].m_PointX;
+      pRect->bottom = m_pPoints[0].m_PointY;
+      pRect->top = m_pPoints[2].m_PointY;
+      pRect->Normalize();
+    }
+    return TRUE;
+  }
+  if (m_PointCount != 5 && m_PointCount != 4) {
+    return FALSE;
+  }
+  if ((m_PointCount == 5 && (m_pPoints[0].m_PointX != m_pPoints[4].m_PointX ||
+                             m_pPoints[0].m_PointY != m_pPoints[4].m_PointY)) ||
+      (m_pPoints[1].m_PointX == m_pPoints[3].m_PointX &&
+       m_pPoints[1].m_PointY == m_pPoints[3].m_PointY)) {
+    return FALSE;
+  }
+  if (m_PointCount == 4 && m_pPoints[0].m_PointX != m_pPoints[3].m_PointX &&
+      m_pPoints[0].m_PointY != m_pPoints[3].m_PointY) {
+    return FALSE;
+  }
+  FX_FLOAT x[5], y[5];
+  for (int i = 0; i < m_PointCount; i++) {
+    pMatrix->Transform(m_pPoints[i].m_PointX, m_pPoints[i].m_PointY, x[i],
+                       y[i]);
+    if (i) {
+      if ((m_pPoints[i].m_Flag & FXPT_TYPE) != FXPT_LINETO) {
+        return FALSE;
+      }
+      if (x[i] != x[i - 1] && y[i] != y[i - 1]) {
+        return FALSE;
+      }
+    }
+  }
+  if (pRect) {
+    pRect->left = x[0];
+    pRect->right = x[2];
+    pRect->bottom = y[0];
+    pRect->top = y[2];
+    pRect->Normalize();
+  }
+  return TRUE;
+}
+
+void CFX_PathData::Copy(const CFX_PathData& src) {
+  SetPointCount(src.m_PointCount);
+  FXSYS_memcpy(m_pPoints, src.m_pPoints, sizeof(FX_PATHPOINT) * m_PointCount);
+}