diff options
| -rw-r--r-- | core/fxcodec/jbig2/JBig2_Image.cpp | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/core/fxcodec/jbig2/JBig2_Image.cpp b/core/fxcodec/jbig2/JBig2_Image.cpp index 13323bac30..b0d75d4d96 100644 --- a/core/fxcodec/jbig2/JBig2_Image.cpp +++ b/core/fxcodec/jbig2/JBig2_Image.cpp @@ -259,14 +259,18 @@ bool CJBig2_Image::composeTo_opt2(CJBig2_Image* pDst, int32_t xs0 = x < 0 ? -x : 0; int32_t xs1; - if (x + m_nWidth > pDst->m_nWidth) - xs1 = pDst->m_nWidth - x; + FX_SAFE_INT32 iChecked = pDst->m_nWidth; + iChecked -= x; + if (iChecked.IsValid() && m_nWidth > iChecked.ValueOrDie()) + xs1 = iChecked.ValueOrDie(); else xs1 = m_nWidth; int32_t ys0 = y < 0 ? -y : 0; int32_t ys1; - if (y + m_nHeight > pDst->m_nHeight) + iChecked = pDst->m_nHeight; + iChecked -= y; + if (iChecked.IsValid() && m_nHeight > iChecked.ValueOrDie()) ys1 = pDst->m_nHeight - y; else ys1 = m_nHeight; |