diff --git a/Userland/Libraries/LibWeb/HTML/CanvasRenderingContext2D.cpp b/Userland/Libraries/LibWeb/HTML/CanvasRenderingContext2D.cpp
index e19173c06e..95718a73be 100644
--- a/Userland/Libraries/LibWeb/HTML/CanvasRenderingContext2D.cpp
+++ b/Userland/Libraries/LibWeb/HTML/CanvasRenderingContext2D.cpp
@@ -705,6 +705,20 @@ void CanvasRenderingContext2D::transform(double a, double b, double c, double d,
m_drawing_state.transform.multiply({ static_cast(a), static_cast(b), static_cast(c), static_cast(d), static_cast(e), static_cast(f) });
}
+// https://html.spec.whatwg.org/multipage/canvas.html#dom-context-2d-settransform
+void CanvasRenderingContext2D::set_transform(double a, double b, double c, double d, double e, double f)
+{
+ // 1. If any of the arguments are infinite or NaN, then return.
+ if (!isfinite(a) || !isfinite(b) || !isfinite(c) || !isfinite(d) || !isfinite(e) || !isfinite(f))
+ return;
+
+ // 2. Reset the current transformation matrix to the identity matrix.
+ m_drawing_state.transform = {};
+
+ // 3. Invoke the transform(a, b, c, d, e, f) method with the same arguments.
+ transform(a, b, c, d, e, f);
+}
+
// https://html.spec.whatwg.org/multipage/canvas.html#check-the-usability-of-the-image-argument
DOM::ExceptionOr check_usability_of_image(CanvasImageSource const& image)
{
diff --git a/Userland/Libraries/LibWeb/HTML/CanvasRenderingContext2D.h b/Userland/Libraries/LibWeb/HTML/CanvasRenderingContext2D.h
index a965ec9121..f00eca01c2 100644
--- a/Userland/Libraries/LibWeb/HTML/CanvasRenderingContext2D.h
+++ b/Userland/Libraries/LibWeb/HTML/CanvasRenderingContext2D.h
@@ -99,6 +99,7 @@ public:
NonnullRefPtr create_conic_gradient(double start_angle, double x, double y);
void transform(double a, double b, double c, double d, double e, double f);
+ void set_transform(double a, double b, double c, double d, double e, double f);
private:
explicit CanvasRenderingContext2D(HTMLCanvasElement&);
diff --git a/Userland/Libraries/LibWeb/HTML/CanvasRenderingContext2D.idl b/Userland/Libraries/LibWeb/HTML/CanvasRenderingContext2D.idl
index 6f64ad7dd2..36cebe7f05 100644
--- a/Userland/Libraries/LibWeb/HTML/CanvasRenderingContext2D.idl
+++ b/Userland/Libraries/LibWeb/HTML/CanvasRenderingContext2D.idl
@@ -57,5 +57,6 @@ interface CanvasRenderingContext2D {
// FIXME: All these `double`s should be `unrestricted double`
undefined transform(double a, double b, double c, double d, double e, double f);
+ undefined setTransform(double a, double b, double c, double d, double e, double f);
};