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LibWeb: Implement CanvasRenderingContext2D.createPattern()

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This is a first pass at implementing CRC2D.createPattern() and the
associated CanvasPattern object. This implementation only works for a
few of the required image sources [like CRC2D.drawImage()], and does
not yet support transforms. Other than that it supports everything
else (which is mainly the various repeat modes).
This commit is contained in:
MacDue 2023-02-02 20:47:46 +00:00 • committed by Andreas Kling
parent 0c313c586b
commit f74e2da875
8 changed files with 229 additions and 8 deletions
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9
Userland/Libraries/LibWeb/HTML/Canvas/CanvasFillStrokeStyles.h
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@ -12,6 +12,7 @@
#include <AK/DeprecatedString.h>
#include <LibWeb/HTML/Canvas/CanvasState.h>
#include <LibWeb/HTML/CanvasGradient.h>
#include <LibWeb/HTML/CanvasPattern.h>
namespace Web::HTML {
@ -20,7 +21,7 @@ template<typename IncludingClass>
class CanvasFillStrokeStyles {
public:
~CanvasFillStrokeStyles() = default;
using FillOrStrokeStyleVariant = Variant<DeprecatedString, JS::Handle<CanvasGradient>>;
using FillOrStrokeStyleVariant = Variant<DeprecatedString, JS::Handle<CanvasGradient>, JS::Handle<CanvasPattern>>;
static CanvasState::FillOrStrokeStyle to_canvas_state_fill_or_stroke_style(auto const& style)
{
@ -73,6 +74,12 @@ public:
return CanvasGradient::create_conic(realm, start_angle, x, y);
}
WebIDL::ExceptionOr<JS::GCPtr<CanvasPattern>> create_pattern(CanvasImageSource const& image, StringView repetition)
{
auto& realm = static_cast<IncludingClass&>(*this).realm();
return CanvasPattern::create(realm, image, repetition);
}
protected:
CanvasFillStrokeStyles() = default;