Remove custom memory manager

core/src/fxge/dib/fx_dib_engine.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_dib.h"
 #include "../../../include/fxge/fx_ge.h"
 #include "dib_int.h"
 #include <limits.h>
@@ skipping 14 matching lines @@
     int ext_size = flags & FXDIB_BICUBIC_INTERPOL ? 3 : 1;
     m_ItemSize = sizeof(int) * 2 + (int)(sizeof(int) * (FXSYS_ceil(FXSYS_fabs((FX_FLOAT)scale)) + ext_size));
     m_DestMin = dest_min;
     if ((dest_max - dest_min) > (int)((1U << 30) - 4) / m_ItemSize) {
         return;
     }
     m_pWeightTables = FX_AllocNL(FX_BYTE, (dest_max - dest_min) * m_ItemSize + 4);
     if (m_pWeightTables == NULL) {
         return;
     }
-    FXSYS_memset32(m_pWeightTables, 0, sizeof(FX_BYTE) * ((dest_max - dest_min)*m_ItemSize + 4));
     if ((flags & FXDIB_NOSMOOTH) != 0 || FXSYS_fabs((FX_FLOAT)scale) < 1.0f) {
         for (int dest_pixel = dest_min; dest_pixel < dest_max; dest_pixel ++) {
             PixelWeight& pixel_weights = *GetPixelWeight(dest_pixel);
             double src_pos = dest_pixel * scale + scale / 2 + base;
             if (flags & FXDIB_INTERPOL) {
                 pixel_weights.m_SrcStart = (int)FXSYS_floor((FX_FLOAT)src_pos - 1.0f / 2);
                 pixel_weights.m_SrcEnd = (int)FXSYS_floor((FX_FLOAT)src_pos + 1.0f / 2);
                 if (pixel_weights.m_SrcStart < src_min) {
                     pixel_weights.m_SrcStart = src_min;
                 }
@@ skipping 154 matching lines @@
     size *= m_DestBpp;
     if (size > INT_MAX - 31) {
         return;
     }
     size += 31;
     size = size / 32 * 4;
     m_pDestScanline = FX_AllocNL(FX_BYTE, size);
     if (m_pDestScanline == NULL) {
         return;
     }
-    FXSYS_memset32(m_pDestScanline, 0, sizeof(FX_BYTE) * size);
     if (dest_format == FXDIB_Rgb32) {
         FXSYS_memset8(m_pDestScanline, 255, size);
     }
     m_InterPitch = (m_DestClip.Width() * m_DestBpp + 31) / 32 * 4;
     m_ExtraMaskPitch = (m_DestClip.Width() * 8 + 31) / 32 * 4;
     m_pInterBuf = NULL;
     m_pSource = pSrcBitmap;
     m_SrcWidth = pSrcBitmap->GetWidth();
     m_SrcHeight = pSrcBitmap->GetHeight();
     m_SrcPitch = (m_SrcWidth * m_SrcBpp + 31) / 32 * 4;
@@ skipping 637 matching lines @@
         }
         m_pSource->DownSampleScanline(src_y, m_pScanline, m_DestBPP, m_DestWidth, m_bFlipX, m_ClipRect.left, result_width);
         FX_LPBYTE scan_extra_alpha = NULL;
         if (m_pMaskScanline) {
             m_pSource->m_pAlphaMask->DownSampleScanline(src_y, m_pMaskScanline, 1, m_DestWidth, m_bFlipX, m_ClipRect.left, result_width);
         }
         m_pDest->ComposeScanline(dest_y, m_pScanline, m_pMaskScanline);
     }
     return FALSE;
 }