From 365333552cf67b7c97c4093177e7ed7b43f540ab Mon Sep 17 00:00:00 2001
From: Tom Sepez <tsepez@chromium.org>
Date: Tue, 16 May 2017 15:40:23 -0700
Subject: CFDE_RenderDevice::m_bOwnerDevice is always false

So remove it.

But they probably wanted it to be true in one place, because
it looks like a leak.  So find a better way to own the object.

Change-Id: I15937e29da5ce8b380f82cb20ee3ecc3f49b8ca3
Reviewed-on: https://pdfium-review.googlesource.com/5473
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>
---
 xfa/fde/cfde_renderdevice.cpp    | 10 +++-------
 xfa/fde/cfde_renderdevice.h      |  3 +--
 xfa/fde/cfde_textout.cpp         | 11 ++++++-----
 xfa/fde/cfde_textout.h           |  2 ++
 xfa/fwl/cfwl_edit.cpp            |  5 +++--
 xfa/fxfa/app/cxfa_textlayout.cpp |  2 +-
 xfa/fxgraphics/cfx_graphics.h    |  2 +-
 7 files changed, 17 insertions(+), 18 deletions(-)

diff --git a/xfa/fde/cfde_renderdevice.cpp b/xfa/fde/cfde_renderdevice.cpp
index 7fb5b0352e..9236dc7800 100644
--- a/xfa/fde/cfde_renderdevice.cpp
+++ b/xfa/fde/cfde_renderdevice.cpp
@@ -22,9 +22,8 @@
 #include "xfa/fgas/font/cfgas_fontmgr.h"
 #include "xfa/fgas/font/cfgas_gefont.h"
 
-CFDE_RenderDevice::CFDE_RenderDevice(CFX_RenderDevice* pDevice,
-                                     bool bOwnerDevice)
-    : m_pDevice(pDevice), m_bOwnerDevice(bOwnerDevice), m_iCharCount(0) {
+CFDE_RenderDevice::CFDE_RenderDevice(CFX_RenderDevice* pDevice)
+    : m_pDevice(pDevice), m_iCharCount(0) {
   ASSERT(pDevice);
 
   FX_RECT rt = m_pDevice->GetClipBox();
@@ -33,10 +32,7 @@ CFDE_RenderDevice::CFDE_RenderDevice(CFX_RenderDevice* pDevice,
                        static_cast<float>(rt.Height()));
 }
 
-CFDE_RenderDevice::~CFDE_RenderDevice() {
-  if (m_bOwnerDevice)
-    delete m_pDevice;
-}
+CFDE_RenderDevice::~CFDE_RenderDevice() {}
 
 int32_t CFDE_RenderDevice::GetWidth() const {
   return m_pDevice->GetWidth();
diff --git a/xfa/fde/cfde_renderdevice.h b/xfa/fde/cfde_renderdevice.h
index f429ac1703..d9f4ce0d34 100644
--- a/xfa/fde/cfde_renderdevice.h
+++ b/xfa/fde/cfde_renderdevice.h
@@ -19,7 +19,7 @@ class CFX_GraphStateData;
 
 class CFDE_RenderDevice {
  public:
-  CFDE_RenderDevice(CFX_RenderDevice* pDevice, bool bOwnerDevice);
+  explicit CFDE_RenderDevice(CFX_RenderDevice* pDevice);
   ~CFDE_RenderDevice();
 
   int32_t GetWidth() const;
@@ -120,7 +120,6 @@ class CFDE_RenderDevice {
 
   CFX_RenderDevice* const m_pDevice;
   CFX_RectF m_rtClip;
-  bool m_bOwnerDevice;
   int32_t m_iCharCount;
 };
 
diff --git a/xfa/fde/cfde_textout.cpp b/xfa/fde/cfde_textout.cpp
index b41ee1fbd8..6d5ab2a980 100644
--- a/xfa/fde/cfde_textout.cpp
+++ b/xfa/fde/cfde_textout.cpp
@@ -7,6 +7,7 @@
 #include "xfa/fde/cfde_textout.h"
 
 #include <algorithm>
+#include <utility>
 
 #include "core/fxcrt/fx_coordinates.h"
 #include "core/fxcrt/fx_system.h"
@@ -117,16 +118,16 @@ void CFDE_TextOut::SetLineSpace(float fLineSpace) {
 
 void CFDE_TextOut::SetDIBitmap(const CFX_RetainPtr<CFX_DIBitmap>& pDIB) {
   ASSERT(pDIB);
-
   m_pRenderDevice.reset();
-  CFX_DefaultRenderDevice* device = new CFX_DefaultRenderDevice;
-  device->Attach(pDIB, false, nullptr, false);
-  m_pRenderDevice = pdfium::MakeUnique<CFDE_RenderDevice>(device, false);
+  m_pDefaultRenderDevice = pdfium::MakeUnique<CFX_DefaultRenderDevice>();
+  m_pDefaultRenderDevice->Attach(pDIB, false, nullptr, false);
+  m_pRenderDevice =
+      pdfium::MakeUnique<CFDE_RenderDevice>(m_pDefaultRenderDevice.get());
 }
 
 void CFDE_TextOut::SetRenderDevice(CFX_RenderDevice* pDevice) {
   ASSERT(pDevice);
-  m_pRenderDevice = pdfium::MakeUnique<CFDE_RenderDevice>(pDevice, false);
+  m_pRenderDevice = pdfium::MakeUnique<CFDE_RenderDevice>(pDevice);
 }
 
 void CFDE_TextOut::SetClipRect(const CFX_Rect& rtClip) {
diff --git a/xfa/fde/cfde_textout.h b/xfa/fde/cfde_textout.h
index 360c3051e9..a52814041b 100644
--- a/xfa/fde/cfde_textout.h
+++ b/xfa/fde/cfde_textout.h
@@ -167,6 +167,8 @@ class CFDE_TextOut {
   int32_t m_iCurPiece;
   int32_t m_iTotalLines;
   std::vector<FXTEXT_CHARPOS> m_CharPos;
+  // NOTE: m_pDefaultRenderDevice must outlive m_pRenderDevice.
+  std::unique_ptr<CFX_DefaultRenderDevice> m_pDefaultRenderDevice;
   std::unique_ptr<CFDE_RenderDevice> m_pRenderDevice;
   std::vector<int32_t> m_HotKeys;
   std::vector<CFX_RectF> m_rectArray;
diff --git a/xfa/fwl/cfwl_edit.cpp b/xfa/fwl/cfwl_edit.cpp
index 8c03402f23..28948cca21 100644
--- a/xfa/fwl/cfwl_edit.cpp
+++ b/xfa/fwl/cfwl_edit.cpp
@@ -566,9 +566,10 @@ void CFWL_Edit::DrawContent(CFX_Graphics* pGraphics,
   if (!pRenderDev)
     return;
 
-  auto pRenderDevice = pdfium::MakeUnique<CFDE_RenderDevice>(pRenderDev, false);
-  auto pRenderContext = pdfium::MakeUnique<CFDE_RenderContext>();
+  auto pRenderDevice = pdfium::MakeUnique<CFDE_RenderDevice>(pRenderDev);
   pRenderDevice->SetClipRect(rtClip);
+
+  auto pRenderContext = pdfium::MakeUnique<CFDE_RenderContext>();
   pRenderContext->StartRender(pRenderDevice.get(), pPage, mt);
   pRenderContext->DoRender();
 
diff --git a/xfa/fxfa/app/cxfa_textlayout.cpp b/xfa/fxfa/app/cxfa_textlayout.cpp
index 686ad4ee0d..c43f7e3260 100644
--- a/xfa/fxfa/app/cxfa_textlayout.cpp
+++ b/xfa/fxfa/app/cxfa_textlayout.cpp
@@ -559,7 +559,7 @@ bool CXFA_TextLayout::DrawString(CFX_RenderDevice* pFxDevice,
   if (!pFxDevice)
     return false;
 
-  auto pDevice = pdfium::MakeUnique<CFDE_RenderDevice>(pFxDevice, false);
+  auto pDevice = pdfium::MakeUnique<CFDE_RenderDevice>(pFxDevice);
   pDevice->SaveState();
   pDevice->SetClipRect(rtClip);
 
diff --git a/xfa/fxgraphics/cfx_graphics.h b/xfa/fxgraphics/cfx_graphics.h
index b2e2cd1c88..8785a387d6 100644
--- a/xfa/fxgraphics/cfx_graphics.h
+++ b/xfa/fxgraphics/cfx_graphics.h
@@ -104,7 +104,7 @@ class CFX_Graphics {
   void SetDIBitsWithMatrix(const CFX_RetainPtr<CFX_DIBSource>& source,
                            CFX_Matrix* matrix);
 
-  CFX_RenderDevice* m_renderDevice;
+  CFX_RenderDevice* const m_renderDevice;  // Not owned.
   std::vector<std::unique_ptr<TInfo>> m_infoStack;
 };
 
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