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-rw-r--r--core/fxge/cfx_font.cpp25
1 files changed, 18 insertions, 7 deletions
diff --git a/core/fxge/cfx_font.cpp b/core/fxge/cfx_font.cpp
index 11fa45710d..da6b0e0fe3 100644
--- a/core/fxge/cfx_font.cpp
+++ b/core/fxge/cfx_font.cpp
@@ -28,6 +28,9 @@
namespace {
+constexpr int kThousandthMinInt = std::numeric_limits<int>::min() / 1000;
+constexpr int kThousandthMaxInt = std::numeric_limits<int>::max() / 1000;
+
struct OUTLINE_PARAMS {
CFX_PathData* m_pPath;
int m_CurX;
@@ -343,9 +346,11 @@ int CFX_Font::GetGlyphWidth(uint32_t glyph_index) {
if (err)
return 0;
- int width = EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
- FXFT_Get_Glyph_HoriAdvance(m_Face));
- return width;
+ int horiAdvance = FXFT_Get_Glyph_HoriAdvance(m_Face);
+ if (horiAdvance < kThousandthMinInt || horiAdvance > kThousandthMaxInt)
+ return 0;
+
+ return EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), horiAdvance);
}
bool CFX_Font::LoadEmbedded(const uint8_t* data, uint32_t size) {
@@ -366,16 +371,22 @@ int CFX_Font::GetAscent() const {
if (!m_Face)
return 0;
- return EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
- FXFT_Get_Face_Ascender(m_Face));
+ int ascender = FXFT_Get_Face_Ascender(m_Face);
+ if (ascender < kThousandthMinInt || ascender > kThousandthMaxInt)
+ return 0;
+
+ return EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), ascender);
}
int CFX_Font::GetDescent() const {
if (!m_Face)
return 0;
- return EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
- FXFT_Get_Face_Descender(m_Face));
+ int descender = FXFT_Get_Face_Descender(m_Face);
+ if (descender < kThousandthMinInt || descender > kThousandthMaxInt)
+ return 0;
+
+ return EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), descender);
}
bool CFX_Font::GetGlyphBBox(uint32_t glyph_index, FX_RECT& bbox) {