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LibGfx/OpenType: Refuse to rasterize glyphs with invalid bounding box

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This commit is contained in:
Andreas Kling 2023-08-12 12:00:16 +02:00
parent 8ac30aa318
commit 43c9c2ef02
1 changed files with 8 additions and 0 deletions
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8
Userland/Libraries/LibGfx/Font/OpenType/Glyf.cpp
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@ -326,6 +326,14 @@ void Glyf::Glyph::rasterize_impl(Gfx::Painter& painter, Gfx::AffineTransform con
RefPtr<Gfx::Bitmap> Glyf::Glyph::rasterize_simple(i16 font_ascender, i16 font_descender, float x_scale, float y_scale, Gfx::GlyphSubpixelOffset subpixel_offset) const
{
if (m_xmin > m_xmax) [[unlikely]] {
dbgln("OpenType: Glyph has invalid xMin ({}) > xMax ({})", m_xmin, m_xmax);
return nullptr;
}
if (font_descender > font_ascender) [[unlikely]] {
dbgln("OpenType: Glyph has invalid ascender ({}) > descender ({})", font_ascender, font_descender);
return nullptr;
}
u32 width = (u32)(ceilf((m_xmax - m_xmin) * x_scale)) + 2;
u32 height = (u32)(ceilf((font_ascender - font_descender) * y_scale)) + 2;
auto bitmap = Gfx::Bitmap::create(Gfx::BitmapFormat::BGRA8888, { width, height }).release_value_but_fixme_should_propagate_errors();