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LibWeb: Extract CanvasTransform class from CRC2D

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The implementation of this got a little funky, because it has to access
methods from CanvasState.
This commit is contained in:
Sam Atkins 2022-08-12 14:48:11 +01:00 • committed by Andreas Kling
parent 08e6071ebb
commit aa87b9699e
5 changed files with 101 additions and 69 deletions
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53
Userland/Libraries/LibWeb/HTML/CanvasRenderingContext2D.cpp
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@ -263,24 +263,6 @@ DOM::ExceptionOr<void> CanvasRenderingContext2D::draw_image(CanvasImageSource co
return {};
}
void CanvasRenderingContext2D::scale(float sx, float sy)
{
dbgln_if(CANVAS_RENDERING_CONTEXT_2D_DEBUG, "CanvasRenderingContext2D::scale({}, {})", sx, sy);
drawing_state().transform.scale(sx, sy);
}
void CanvasRenderingContext2D::translate(float tx, float ty)
{
dbgln_if(CANVAS_RENDERING_CONTEXT_2D_DEBUG, "CanvasRenderingContext2D::translate({}, {})", tx, ty);
drawing_state().transform.translate(tx, ty);
}
void CanvasRenderingContext2D::rotate(float radians)
{
dbgln_if(CANVAS_RENDERING_CONTEXT_2D_DEBUG, "CanvasRenderingContext2D::rotate({})", radians);
drawing_state().transform.rotate_radians(radians);
}
void CanvasRenderingContext2D::did_draw(Gfx::FloatRect const&)
{
// FIXME: Make use of the rect to reduce the invalidated area when possible.
@ -601,41 +583,6 @@ NonnullRefPtr<CanvasGradient> CanvasRenderingContext2D::create_conic_gradient(do
return CanvasGradient::create_conic(start_angle, x, y);
}
// https://html.spec.whatwg.org/multipage/canvas.html#dom-context-2d-transform
void CanvasRenderingContext2D::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. Replace the current transformation matrix with the result of multiplying the current transformation matrix with the matrix described by:
// a c e
// b d f
// 0 0 1
drawing_state().transform.multiply({ static_cast<float>(a), static_cast<float>(b), static_cast<float>(c), static_cast<float>(d), static_cast<float>(e), static_cast<float>(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.
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#dom-context-2d-resettransform
void CanvasRenderingContext2D::reset_transform()
{
// The resetTransform() method, when invoked, must reset the current transformation matrix to the identity matrix.
drawing_state().transform = {};
}
void CanvasRenderingContext2D::clip()
{
// FIXME: Implement.