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LibGfx: Add Painter::draw_text_run(), a simplified text painting API

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This API does:
    - Take a Utf8View
    - Take the starting point on the baseline as its input coordinate

This API does not:
    - Align the text
    - Wrap the text
    - Elide too-long text into "..."
This commit is contained in:
Andreas Kling 2022-03-28 13:40:48 +02:00
parent e398164f10
commit 7850628ff1
2 changed files with 22 additions and 0 deletions
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19
Userland/Libraries/LibGfx/Painter.cpp
View file

@ -2314,4 +2314,23 @@ void Gfx::Painter::draw_ui_text(Gfx::IntRect const& rect, StringView text, Gfx::
}
}
}
void Painter::draw_text_run(FloatPoint const& baseline_start, Utf8View const& string, Font const& font, Color color)
{
auto pixel_metrics = font.pixel_metrics();
float x = baseline_start.x();
int y = baseline_start.y() - pixel_metrics.ascent;
float space_width = font.glyph_or_emoji_width(' ');
for (auto code_point : string) {
if (code_point == ' ') {
x += space_width;
continue;
}
float advance = font.glyph_or_emoji_width(code_point) + font.glyph_spacing();
draw_glyph_or_emoji({ (int)roundf(x), y }, code_point, font, color);
x += advance;
}
}
}