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LibWeb: Add a very basic glyph texture cache in Skia painter

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This prevents repeated uploading of the same glyph textures into
GPU-memory.
This commit is contained in:
Aliaksandr Kalenik 2024-07-24 22:36:50 +03:00 committed by Andreas Kling
parent 67d68eac64
commit 61da1236e7
Notes: github-actions[bot] 2024-07-25 12:34:31 +00:00 
Author: https://github.com/kalenikaliaksandr
Commit: https://github.com/LadybirdBrowser/ladybird/commit/61da1236e77
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/826
1 changed files with 14 additions and 6 deletions
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20
Userland/Libraries/LibWeb/Painting/DisplayListPlayerSkia.cpp
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@ -387,6 +387,8 @@ DisplayListPlayerSkia::SkiaSurface& DisplayListPlayerSkia::surface() const
return static_cast<SkiaSurface&>(*m_surface);
}
static HashMap<Gfx::Bitmap*, sk_sp<SkImage>> s_glyph_cache;
void DisplayListPlayerSkia::draw_glyph_run(DrawGlyphRun const& command)
{
auto& canvas = surface().canvas();
@ -409,13 +411,19 @@ void DisplayListPlayerSkia::draw_glyph_run(DrawGlyphRun const& command)
auto maybe_font_glyph = scaled_font->glyph(code_point, glyph_position.subpixel_offset);
if (!maybe_font_glyph.has_value())
continue;
if (maybe_font_glyph->is_color_bitmap()) {
TODO();
} else {
auto sk_bitmap = to_skia_bitmap(*maybe_font_glyph->bitmap());
auto sk_image = SkImages::RasterFromBitmap(sk_bitmap);
if (!maybe_font_glyph->is_color_bitmap()) {
auto const& blit_position = glyph_position.blit_position;
canvas.drawImage(sk_image, blit_position.x(), blit_position.y(), SkSamplingOptions(), &paint);
sk_sp<SkImage> image;
if (auto maybe_image = s_glyph_cache.get(maybe_font_glyph->bitmap()); maybe_image.has_value()) {
image = maybe_image.value();
} else {
auto sk_bitmap = to_skia_bitmap(*maybe_font_glyph->bitmap());
image = SkImages::RasterFromBitmap(sk_bitmap);
s_glyph_cache.set(maybe_font_glyph->bitmap(), image);
}
canvas.drawImage(image, blit_position.x(), blit_position.y(), SkSamplingOptions(), &paint);
} else {
TODO();
}
}
}