external/pdfium/ubsan.patch

   1 --- core/fxge/ge/cfx_facecache.cpp
   2 +++ core/fxge/ge/cfx_facecache.cpp
   3 @@ -206,7 +206,8 @@ CFX_GlyphBitmap* CFX_FaceCache::RenderGlyph(const CFX_Font* pFont,
   4        }
   5      }
   6    } else {
   7 -    memset(pDestBuf, 0, dest_pitch * bmheight);
   8 +    if (dest_pitch != 0 && bmheight != 0)
   9 +      memset(pDestBuf, 0, dest_pitch * bmheight);
  10      if (anti_alias == FXFT_RENDER_MODE_MONO &&
  11          FXFT_Get_Bitmap_PixelMode(FXFT_Get_Glyph_Bitmap(m_Face)) ==
  12              FXFT_PIXEL_MODE_MONO) {
  13 --- third_party/agg23/agg_rasterizer_scanline_aa.h
  14 +++ third_party/agg23/agg_rasterizer_scanline_aa.h
  15 @@ -349,14 +349,14 @@
  16                      cover += cur_cell->cover;
  17                  }
  18                  if(area) {
  19 -                    alpha = calculate_alpha((cover << (poly_base_shift + 1)) - area, no_smooth);
  20 +                    alpha = calculate_alpha(int(unsigned(cover) << (poly_base_shift + 1)) - area, no_smooth);
  21                      if(alpha) {
  22                          sl.add_cell(x, alpha);
  23                      }
  24                      x++;
  25                  }
  26                  if(num_cells && cur_cell->x > x) {
  27 -                    alpha = calculate_alpha(cover << (poly_base_shift + 1), no_smooth);
  28 +                    alpha = calculate_alpha(unsigned(cover) << (poly_base_shift + 1), no_smooth);
  29                      if(alpha) {
  30                          sl.add_span(x, cur_cell->x - x, alpha);
  31                      }