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mmap all the font files!

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Font now uses the same in-memory format as the font files we have on disk.
This allows us to simply mmap() the font files and not use any additional
memory for them. Very cool! :^)

Hacking on this exposed a bug in file-backed VMObjects where the first client
to instantiate a VMObject for a specific inode also got to decide its size.
Since file-backed VMObjects always have the same size as the underlying file,
this made no sense, so I removed the ability to even set a size in that case.
This commit is contained in:
Andreas Kling 2019-02-05 06:43:33 +01:00
parent 612c02307e
commit a258d6507a
11 changed files with 134 additions and 110 deletions
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23
SharedGraphics/Painter.cpp
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@ -206,6 +206,29 @@ void Painter::draw_bitmap(const Point& p, const CharacterBitmap& bitmap, Color c
}
}
void Painter::draw_bitmap(const Point& p, const GlyphBitmap& bitmap, Color color)
{
Rect rect { p, bitmap.size() };
rect.move_by(m_translation);
auto clipped_rect = Rect::intersection(rect, m_clip_rect);
if (clipped_rect.is_empty())
return;
const int first_row = clipped_rect.top() - rect.top();
const int last_row = clipped_rect.bottom() - rect.top();
const int first_column = clipped_rect.left() - rect.left();
const int last_column = clipped_rect.right() - rect.left();
RGBA32* dst = m_target->scanline(clipped_rect.y()) + clipped_rect.x();
const size_t dst_skip = m_target->width();
for (int row = first_row; row <= last_row; ++row) {
for (int j = 0; j <= (last_column - first_column); ++j) {
if (bitmap.bit_at(j, row))
dst[j] = color.value();
}
dst += dst_skip;
}
}
FLATTEN void Painter::draw_glyph(const Point& point, char ch, Color color)
{
draw_bitmap(point, font().glyph_bitmap(ch), color);