diff options
Diffstat (limited to 'vcl/headless/svpgdi.cxx')
| -rw-r--r-- | vcl/headless/svpgdi.cxx | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/vcl/headless/svpgdi.cxx b/vcl/headless/svpgdi.cxx index 35bbcf656605..f155402a0880 100644 --- a/vcl/headless/svpgdi.cxx +++ b/vcl/headless/svpgdi.cxx @@ -256,7 +256,7 @@ namespace { private: cairo_surface_t* pSurface; - std::unordered_map<unsigned long long, cairo_surface_t*> maDownscaled; + std::unordered_map<sal_uInt64, cairo_surface_t*> maDownscaled; SurfaceHelper(const SurfaceHelper&) = delete; SurfaceHelper& operator=(const SurfaceHelper&) = delete; @@ -303,7 +303,10 @@ namespace nH = (1 == nHFactor) ? nTargetHeight : nH * 2; // check if we have a downscaled version of required size - const unsigned long long key((nW * LONG_MAX) + nH); + // bail out if the multiplication for the key would overflow + if( nW >= SAL_MAX_UINT32 || nH >= SAL_MAX_UINT32 ) + return pSurface; + const sal_uInt64 key((nW * static_cast<sal_uInt64>(SAL_MAX_UINT32)) + nH); auto isHit(maDownscaled.find(key)); if(isHit != maDownscaled.end()) |