Remove custom memory manager

core/src/fpdfapi/fpdf_render/fpdf_render_text.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 "../../../include/fxge/fx_ge.h"
 #include "../../../include/fpdfapi/fpdf_render.h"
 #include "../../../include/fpdfapi/fpdf_pageobj.h"
 #include "../fpdf_page/pageint.h"
@@ skipping 372 matching lines @@
     textobj->GetTextMatrix(&text_matrix);
     CFX_AffineMatrix char_matrix = pType3Font->GetFontMatrix();
     FX_FLOAT font_size = textobj->m_TextState.GetFontSize();
     char_matrix.Scale(font_size, font_size);
     FX_ARGB fill_argb = GetFillArgb(textobj, TRUE);
     int fill_alpha = FXARGB_A(fill_argb);
     int device_class = m_pDevice->GetDeviceClass();
     FXTEXT_GLYPHPOS* pGlyphAndPos = NULL;
     if (device_class == FXDC_DISPLAY) {
         pGlyphAndPos = FX_Alloc(FXTEXT_GLYPHPOS, textobj->m_nChars);
-        FXSYS_memset32(pGlyphAndPos, 0, sizeof(FXTEXT_GLYPHPOS) * textobj->m_nChars);
     } else if (fill_alpha < 255) {
         return FALSE;
     }
     CPDF_RefType3Cache refTypeCache(pType3Font);
     FX_DWORD *pChars = textobj->m_pCharCodes;
     if (textobj->m_nChars == 1) {
         pChars = (FX_DWORD*)(&textobj->m_pCharCodes);
     }
     for (int iChar = 0; iChar < textobj->m_nChars; iChar ++) {
         FX_DWORD charcode = pChars[iChar];
@@ skipping 129 matching lines @@
 CPDF_CharPosList::~CPDF_CharPosList()
 {
     if (m_pCharPos) {
         FX_Free(m_pCharPos);
     }
 }
 void CPDF_CharPosList::Load(int nChars, FX_DWORD* pCharCodes, FX_FLOAT* pCharPos, CPDF_Font* pFont,
                             FX_FLOAT FontSize)
 {
     m_pCharPos = FX_Alloc(FXTEXT_CHARPOS, nChars);
-    FXSYS_memset32(m_pCharPos, 0, sizeof(FXTEXT_CHARPOS) * nChars);
     m_nChars = 0;
     CPDF_CIDFont* pCIDFont = pFont->GetCIDFont();
     FX_BOOL bVertWriting = pCIDFont && pCIDFont->IsVertWriting();
     for (int iChar = 0; iChar < nChars; iChar ++) {
         FX_DWORD CharCode = nChars == 1 ? (FX_DWORD)(FX_UINTPTR)pCharCodes : pCharCodes[iChar];
         if (CharCode == (FX_DWORD) - 1) {
             continue;
         }
         FX_BOOL bVert = FALSE;
         FXTEXT_CHARPOS& charpos = m_pCharPos[m_nChars++];
@@ skipping 197 matching lines @@
     }
 }
 CFX_PathData* CPDF_Font::LoadGlyphPath(FX_DWORD charcode, int dest_width)
 {
     int glyph_index = GlyphFromCharCode(charcode);
     if (m_Font.m_Face == NULL) {
         return NULL;
     }
     return m_Font.LoadGlyphPath(glyph_index, dest_width);
 }