Remove PageObject's m_Type and add As<Type> functions

core/src/fpdfapi/fpdf_render/fpdf_render_pattern.cpp

 // 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
 
 #include "core/src/fpdfapi/fpdf_render/render_int.h"
 
 #include "core/include/fpdfapi/fpdf_pageobj.h"
 #include "core/include/fpdfapi/fpdf_render.h"
@@ skipping 894 matching lines @@
   }
   if (bAlphaMode) {
     pBitmap->LoadChannel(FXDIB_Red, pBitmap, FXDIB_Alpha);
   }
   if (m_Options.m_ColorMode == RENDER_COLOR_GRAY) {
     pBitmap->ConvertColorScale(m_Options.m_ForeColor, m_Options.m_BackColor);
   }
   buffer.OutputToDevice();
 }
 void CPDF_RenderStatus::DrawShadingPattern(CPDF_ShadingPattern* pattern,
-                                           CPDF_PageObject* pPageObj,
+                                           const CPDF_PageObject* pPageObj,
                                            const CFX_Matrix* pObj2Device,
                                            FX_BOOL bStroke) {
   if (!pattern->Load()) {
     return;
   }
   m_pDevice->SaveState();
-  if (pPageObj->m_Type == CPDF_PageObject::PATH) {
-    if (!SelectClipPath((CPDF_PathObject*)pPageObj, pObj2Device, bStroke)) {
+  if (pPageObj->IsPath()) {
+    if (!SelectClipPath(pPageObj->AsPath(), pObj2Device, bStroke)) {
       m_pDevice->RestoreState();
       return;
     }
-  } else if (pPageObj->m_Type == CPDF_PageObject::IMAGE) {
+  } else if (pPageObj->IsImage()) {
     FX_RECT rect = pPageObj->GetBBox(pObj2Device);
     m_pDevice->SetClip_Rect(&rect);
   } else {
     return;
   }
   FX_RECT rect;
   if (GetObjectClippedRect(pPageObj, pObj2Device, FALSE, rect)) {
     m_pDevice->RestoreState();
     return;
   }
   CFX_Matrix matrix = pattern->m_Pattern2Form;
   matrix.Concat(*pObj2Device);
   GetScaledMatrix(matrix);
   int alpha = pPageObj->m_GeneralState.GetAlpha(bStroke);
   DrawShading(pattern, &matrix, rect, alpha,
               m_Options.m_ColorMode == RENDER_COLOR_ALPHA);
   m_pDevice->RestoreState();
 }
-FX_BOOL CPDF_RenderStatus::ProcessShading(CPDF_ShadingObject* pShadingObj,
+FX_BOOL CPDF_RenderStatus::ProcessShading(const CPDF_ShadingObject* pShadingObj,
                                           const CFX_Matrix* pObj2Device) {
   FX_RECT rect = pShadingObj->GetBBox(pObj2Device);
   FX_RECT clip_box = m_pDevice->GetClipBox();
   rect.Intersect(clip_box);
   if (rect.IsEmpty()) {
     return TRUE;
   }
   CFX_Matrix matrix = pShadingObj->m_Matrix;
   matrix.Concat(*pObj2Device);
   DrawShading(pShadingObj->m_pShading, &matrix, rect,
@@ skipping 30 matching lines @@
     options.m_ColorMode = RENDER_COLOR_ALPHA;
   }
   flags |= RENDER_FORCE_HALFTONE;
   options.m_Flags = flags;
   CPDF_RenderContext context(pDoc, pCache);
   context.AppendLayer(pPattern->m_pForm, &mtPattern2Bitmap);
   context.Render(&bitmap_device, &options, nullptr);
   return pBitmap;
 }
 void CPDF_RenderStatus::DrawTilingPattern(CPDF_TilingPattern* pPattern,
-                                          CPDF_PageObject* pPageObj,
+                                          const CPDF_PageObject* pPageObj,
                                           const CFX_Matrix* pObj2Device,
                                           FX_BOOL bStroke) {
   if (!pPattern->Load()) {
     return;
   }
   m_pDevice->SaveState();
-  if (pPageObj->m_Type == CPDF_PageObject::PATH) {
-    if (!SelectClipPath((CPDF_PathObject*)pPageObj, pObj2Device, bStroke)) {
+  if (pPageObj->IsPath()) {
+    if (!SelectClipPath(pPageObj->AsPath(), pObj2Device, bStroke)) {
       m_pDevice->RestoreState();
       return;
     }
-  } else if (pPageObj->m_Type == CPDF_PageObject::IMAGE) {
+  } else if (pPageObj->IsImage()) {
     FX_RECT rect = pPageObj->GetBBox(pObj2Device);
     m_pDevice->SetClip_Rect(&rect);
   } else {
     return;
   }
   FX_RECT clip_box = m_pDevice->GetClipBox();
   if (clip_box.IsEmpty()) {
     m_pDevice->RestoreState();
     return;
   }
@@ skipping 152 matching lines @@
                                fill_argb, 0, 0);
         }
       }
     }
   }
   CompositeDIBitmap(&screen, clip_box.left, clip_box.top, 0, 255,
                     FXDIB_BLEND_NORMAL, FALSE);
   m_pDevice->RestoreState();
   delete pPatternBitmap;
 }
-void CPDF_RenderStatus::DrawPathWithPattern(CPDF_PathObject* pPathObj,
+void CPDF_RenderStatus::DrawPathWithPattern(const CPDF_PathObject* pPathObj,
                                             const CFX_Matrix* pObj2Device,
                                             CPDF_Color* pColor,
                                             FX_BOOL bStroke) {
   CPDF_Pattern* pattern = pColor->GetPattern();
   if (!pattern) {
     return;
   }
   if (pattern->m_PatternType == CPDF_Pattern::TILING) {
     DrawTilingPattern(static_cast<CPDF_TilingPattern*>(pattern), pPathObj,
                       pObj2Device, bStroke);
   } else {
     DrawShadingPattern(static_cast<CPDF_ShadingPattern*>(pattern), pPathObj,
                        pObj2Device, bStroke);
   }
 }
-void CPDF_RenderStatus::ProcessPathPattern(CPDF_PathObject* pPathObj,
+void CPDF_RenderStatus::ProcessPathPattern(const CPDF_PathObject* pPathObj,
                                            const CFX_Matrix* pObj2Device,
                                            int& filltype,
                                            FX_BOOL& bStroke) {
   if (filltype) {
     CPDF_Color& FillColor = *pPathObj->m_ColorState.GetFillColor();
     if (FillColor.m_pCS && FillColor.m_pCS->GetFamily() == PDFCS_PATTERN) {
       DrawPathWithPattern(pPathObj, pObj2Device, &FillColor, FALSE);
       filltype = 0;
     }
   }
   if (bStroke) {
     CPDF_Color& StrokeColor = *pPathObj->m_ColorState.GetStrokeColor();
     if (StrokeColor.m_pCS && StrokeColor.m_pCS->GetFamily() == PDFCS_PATTERN) {
       DrawPathWithPattern(pPathObj, pObj2Device, &StrokeColor, TRUE);
       bStroke = FALSE;
     }
   }
 }