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LibWeb: Add CanvasRenderingContext2D.clearRect()

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Similar to fillRect, except this API fills with transparent black.
This commit is contained in:
Andreas Kling 2021-03-15 19:40:42 +01:00
parent 4559faf8d8
commit d434ae71b3
Notes: sideshowbarker 2024-07-18 21:19:41 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/d434ae71b32
3 changed files with 13 additions and 0 deletions
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11
Userland/Libraries/LibWeb/HTML/CanvasRenderingContext2D.cpp
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@ -64,6 +64,17 @@ void CanvasRenderingContext2D::fill_rect(float x, float y, float width, float he
did_draw(rect);
}
void CanvasRenderingContext2D::clear_rect(float x, float y, float width, float height)
{
auto painter = this->painter();
if (!painter)
return;
auto rect = m_transform.map(Gfx::FloatRect(x, y, width, height));
painter->clear_rect(enclosing_int_rect(rect), Color());
did_draw(rect);
}
void CanvasRenderingContext2D::set_stroke_style(String style)
{
m_stroke_style = Gfx::Color::from_string(style).value_or(Color::Black);

1
Userland/Libraries/LibWeb/HTML/CanvasRenderingContext2D.h
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@ -57,6 +57,7 @@ public:
void fill_rect(float x, float y, float width, float height);
void stroke_rect(float x, float y, float width, float height);
void clear_rect(float x, float y, float width, float height);
void draw_image(const HTMLImageElement&, float x, float y);

1
Userland/Libraries/LibWeb/HTML/CanvasRenderingContext2D.idl
View File

@ -2,6 +2,7 @@ interface CanvasRenderingContext2D {
undefined fillRect(double x, double y, double w, double h);
undefined strokeRect(double x, double y, double w, double h);
undefined clearRect(double x, double y, double w, double h);
undefined scale(double x, double y);
undefined translate(double x, double y);