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LibWeb: Add support for text in the AffineCommandExecutorCPU

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MacDue 2024-06-09 21:38:16 +01:00 committed by Nico Weber
parent 0ca71009d0
commit 860804baa5
1 changed files with 25 additions and 3 deletions
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28
Userland/Libraries/LibWeb/Painting/AffineCommandExecutorCPU.cpp
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@ -4,8 +4,9 @@
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/TypeCasts.h>
#include <LibGfx/Font/ScaledFont.h>
#include <LibWeb/Painting/AffineCommandExecutorCPU.h>
namespace Web::Painting {
// This executor is hopes to handle (at least) 2D CSS transforms. All commands
@ -77,9 +78,30 @@ AffineCommandExecutorCPU::AffineCommandExecutorCPU(Gfx::Bitmap& bitmap, Gfx::Aff
.target = bitmap });
}
CommandResult AffineCommandExecutorCPU::draw_glyph_run(DrawGlyphRun const&)
CommandResult AffineCommandExecutorCPU::draw_glyph_run(DrawGlyphRun const& command)
{
// FIXME: Implement.
prepare_clipping(command.bounding_rect());
auto scale = Gfx::AffineTransform {}.scale(command.scale, command.scale);
auto const& glyphs = command.glyph_run->glyphs();
Gfx::Path path;
for (auto& glyph_or_emoji : glyphs) {
if (auto* glyph = glyph_or_emoji.get_pointer<Gfx::DrawGlyph>()) {
if (!is<Gfx::ScaledFont>(glyph->font))
return CommandResult::Continue;
auto& scaled_font = static_cast<Gfx::ScaledFont const&>(*glyph->font);
auto position = glyph->position.translated(scaled_font.glyph_left_bearing(glyph->code_point), 0);
auto glyph_id = scaled_font.glyph_id_for_code_point(glyph->code_point);
Gfx::Path glyph_path;
scaled_font.append_glyph_path_to(glyph_path, glyph_id);
glyph_path.transform(Gfx::AffineTransform(scale).translate(position));
path.append_path(glyph_path);
} else {
// TODO: Implement bitmap emojis via transformed bitmaps.
}
}
auto path_transform = Gfx::AffineTransform(stacking_context().transform).multiply(Gfx::AffineTransform {}.set_translation(command.translation));
path.transform(path_transform);
aa_painter().fill_path(path, command.color);
return CommandResult::Continue;
}