Don't stretch bitmaps if destination size is empty.

core/src/fxge/win32/fx_win32_device.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"
 #if _FX_OS_ == _FX_WIN32_DESKTOP_ || _FX_OS_ == _FX_WIN64_
 #include "../../../include/fxge/fx_ge_win32.h"
 #include <crtdbg.h>
@@ skipping 497 matching lines @@
         if (pBitmap != pBitmap1) {
             delete pBitmap;
         }
     }
     return TRUE;
 }
 FX_BOOL CGdiDeviceDriver::GDI_StretchDIBits(const CFX_DIBitmap* pBitmap1, int dest_left, int dest_top,
         int dest_width, int dest_height, FX_DWORD flags, void* pIccTransform)
 {
     CFX_DIBitmap* pBitmap = (CFX_DIBitmap*)pBitmap1;
-    if (pBitmap == NULL) {
+    if (pBitmap == NULL || dest_width == 0  || dest_height == 0) {
         return FALSE;
     }
     if ((pBitmap->IsCmykImage() || pIccTransform) &&
             !pBitmap->ConvertFormat(FXDIB_Rgb, pIccTransform)) {
         return FALSE;
     }
     CFX_ByteString info = CFX_WindowsDIB::GetBitmapInfo(pBitmap);
     if ((FX_INT64)abs(dest_width) * abs(dest_height) < (FX_INT64)pBitmap1->GetWidth() * pBitmap1->GetHeight() * 4 ||
             (flags & FXDIB_INTERPOL) || (flags & FXDIB_BICUBIC_INTERPOL)) {
         SetStretchBltMode(m_hDC, HALFTONE);
@@ skipping 13 matching lines @@
     if (del) {
         delete pToStrechBitmap;
     }
     return TRUE;
 }
 FX_BOOL CGdiDeviceDriver::GDI_StretchBitMask(const CFX_DIBitmap* pBitmap1, int dest_left, int dest_top,
         int dest_width, int dest_height, FX_DWORD bitmap_color, FX_DWORD flags,
         int alpha_flag, void* pIccTransform)
 {
     CFX_DIBitmap* pBitmap = (CFX_DIBitmap*)pBitmap1;
-    if (pBitmap == NULL) {
+    if (pBitmap == NULL || dest_width == 0  || dest_height == 0) {
         return FALSE;
     }
     _Color2Argb(bitmap_color, bitmap_color, alpha_flag | (1 << 24), pIccTransform);
     int width = pBitmap->GetWidth(), height = pBitmap->GetHeight();
     struct {
         BITMAPINFOHEADER        bmiHeader;
         FX_DWORD                        bmiColors[2];
     } bmi;
     FXSYS_memset32(&bmi.bmiHeader, 0, sizeof (BITMAPINFOHEADER));
     bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
@@ skipping 628 matching lines @@
     if (m_hDC) {
         SelectObject(m_hDC, m_hOldBitmap);
         DeleteDC(m_hDC);
     }
     if (m_hBitmap) {
         DeleteObject(m_hBitmap);
     }
     delete GetBitmap();
 }
 #endif