RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-26 20:57:44 +00:00
Code Issues Activity Actions

LibGfx+LibWeb: Update for_each_glyph_position to use font cascade list

Browse source 
This change updates function that builds list of glyphs to use font
cascade list to find font for each code point.
This commit is contained in:
Aliaksandr Kalenik 2023-12-09 23:45:57 +01:00 • committed by Andreas Kling
parent 2cb0039a13
commit df57d7ca68
8 changed files with 66 additions and 16 deletions
Download patch file Download diff file Expand all files Collapse all files

24
Userland/Libraries/LibGfx/TextLayout.h
View file

@ -14,6 +14,7 @@
#include <AK/Utf8View.h>
#include <AK/Vector.h>
#include <LibGfx/Font/Font.h>
#include <LibGfx/FontCascadeList.h>
#include <LibGfx/Forward.h>
#include <LibGfx/Rect.h>
#include <LibGfx/TextElision.h>
@ -92,34 +93,35 @@ using DrawGlyphOrEmoji = Variant<DrawGlyph, DrawEmoji>;
Variant<DrawGlyph, DrawEmoji> prepare_draw_glyph_or_emoji(FloatPoint point, Utf8CodePointIterator& it, Font const& font);
template<typename Callback>
void for_each_glyph_position(FloatPoint baseline_start, Utf8View string, Font const& font, Callback callback, IncludeLeftBearing include_left_bearing = IncludeLeftBearing::No, Optional<float&> width = {})
void for_each_glyph_position(FloatPoint baseline_start, Utf8View string, FontCascadeList const& font_list, Callback callback, IncludeLeftBearing include_left_bearing = IncludeLeftBearing::No, Optional<float&> width = {})
{
float space_width = font.glyph_width(' ') + font.glyph_spacing();
float space_width = font_list.first().glyph_width(' ') + font_list.first().glyph_spacing();
u32 last_code_point = 0;
auto point = baseline_start;
point.translate_by(0, -font.pixel_metrics().ascent);
for (auto code_point_iterator = string.begin(); code_point_iterator != string.end(); ++code_point_iterator) {
auto it = code_point_iterator; // The callback function will advance the iterator, so create a copy for this lookup.
auto code_point = *code_point_iterator;
RefPtr<Gfx::Font const> font = font_list.font_for_code_point(code_point);
point.set_y(baseline_start.y() - font->pixel_metrics().ascent);
if (should_paint_as_space(code_point)) {
point.translate_by(space_width, 0);
last_code_point = code_point;
continue;
}
auto kerning = font.glyphs_horizontal_kerning(last_code_point, code_point);
auto kerning = font->glyphs_horizontal_kerning(last_code_point, code_point);
if (kerning != 0.0f)
point.translate_by(kerning, 0);
auto it = code_point_iterator; // The callback function will advance the iterator, so create a copy for this lookup.
auto glyph_width = font.glyph_or_emoji_width(it) + font.glyph_spacing();
auto glyph_or_emoji = prepare_draw_glyph_or_emoji(point, code_point_iterator, font);
auto glyph_width = font->glyph_or_emoji_width(it) + font->glyph_spacing();
auto glyph_or_emoji = prepare_draw_glyph_or_emoji(point, code_point_iterator, *font);
if (include_left_bearing == IncludeLeftBearing::Yes) {
if (glyph_or_emoji.has<DrawGlyph>())
glyph_or_emoji.get<DrawGlyph>().position += FloatPoint(font.glyph_left_bearing(code_point), 0);
glyph_or_emoji.get<DrawGlyph>().position += FloatPoint(font->glyph_left_bearing(code_point), 0);
}
callback(glyph_or_emoji);
@ -129,7 +131,7 @@ void for_each_glyph_position(FloatPoint baseline_start, Utf8View string, Font co
}
if (width.has_value())
*width = point.x() - font.glyph_spacing();
*width = point.x() - font_list.first().glyph_spacing();
}
}