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LibWeb: Add a naive implemention of CanvasRenderingContext2D::fill_text

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This doesnt actually account for several unimplemented attributes
(like ltr/rtl, alignment, etc) yet, so this should be expanded in
the future.
This commit is contained in:
Idan Horowitz 2021-04-15 20:36:10 +03:00 • committed by Andreas Kling
parent a257ef0f35
commit 00114ab01d
3 changed files with 20 additions and 0 deletions
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16
Userland/Libraries/LibWeb/HTML/CanvasRenderingContext2D.cpp
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@ -163,6 +163,22 @@ OwnPtr<Gfx::Painter> CanvasRenderingContext2D::painter()
return make<Gfx::Painter>(*m_element->bitmap());
}
void CanvasRenderingContext2D::fill_text(const String& text, float x, float y, Optional<double> max_width)
{
if (max_width.has_value() && max_width.value() <= 0)
return;
auto painter = this->painter();
if (!painter)
return;
// FIXME: painter only supports integer rects for text right now, so this effectively chops off any fractional position
auto text_rect = Gfx::IntRect(x, y, max_width.has_value() ? max_width.value() : painter->font().width(text), painter->font().glyph_height());
auto transformed_rect = m_transform.map(text_rect);
painter->draw_text(transformed_rect, text, Gfx::TextAlignment::TopLeft, m_fill_style);
did_draw(transformed_rect.to<float>());
}
void CanvasRenderingContext2D::begin_path()
{
m_path = Gfx::Path();

2
Userland/Libraries/LibWeb/HTML/CanvasRenderingContext2D.h
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@ -80,6 +80,8 @@ public:
void rect(float x, float y, float width, float height);
void stroke();
void fill_text(const String&, float x, float y, Optional<double> max_width);
// FIXME: We should only have one fill(), really. Fix the wrapper generator!
void fill(Gfx::Painter::WindingRule);
void fill(const String& fill_rule);

2
Userland/Libraries/LibWeb/HTML/CanvasRenderingContext2D.idl
View file

@ -20,6 +20,8 @@ interface CanvasRenderingContext2D {
undefined ellipse(double x, double y, double radiusX, double radiusY, double rotation, double startAngle, double endAngle, optional boolean counterclockwise = false);
undefined rect(double x, double y, double width, double height);
undefined fillText(DOMString text, double x, double y, optional double maxWidth);
undefined drawImage(HTMLImageElement image, double dx, double dy);
attribute DOMString fillStyle;