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LibGfx: Implement PaintStyle for SVG radial gradients

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This also slightly refactors things to share more implementation with
the SVG linear gradients, and improve accuracy (which fixes some banding
issues).
This commit is contained in:
MacDue 2023-05-02 22:43:46 +01:00 • committed by Andreas Kling
parent 3d54b9ffa3
commit 81cefab1b1
2 changed files with 113 additions and 44 deletions
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56
Userland/Libraries/LibGfx/PaintStyle.h
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@ -247,15 +247,15 @@ private:
class SVGGradientPaintStyle : public GradientPaintStyle {
public:
void set_gradient_transform(Gfx::AffineTransform transform)
{
m_gradient_transform = transform;
}
void set_gradient_transform(Gfx::AffineTransform transform);
Optional<Gfx::AffineTransform> const& gradient_transform() const { return m_gradient_transform; }
protected:
Optional<AffineTransform> const& scale_adjusted_inverse_gradient_transform() const { return m_inverse_transform; }
float gradient_transform_scale() const { return m_scale; }
private:
Optional<Gfx::AffineTransform> m_gradient_transform {};
Optional<AffineTransform> m_inverse_transform {};
float m_scale = 1.0f;
};
class SVGLinearGradientPaintStyle final : public SVGGradientPaintStyle {
@ -288,4 +288,48 @@ private:
FloatPoint m_p1;
};
class SVGRadialGradientPaintStyle final : public SVGGradientPaintStyle {
public:
static ErrorOr<NonnullRefPtr<SVGRadialGradientPaintStyle>> create(FloatPoint start_center, float start_radius, FloatPoint end_center, float end_radius)
{
return adopt_nonnull_ref_or_enomem(new (nothrow) SVGRadialGradientPaintStyle(start_center, start_radius, end_center, end_radius));
}
void set_start_center(FloatPoint start_center)
{
m_start_center = start_center;
}
void set_start_radius(float start_radius)
{
m_start_radius = start_radius;
}
void set_end_center(FloatPoint end_center)
{
m_end_center = end_center;
}
void set_end_radius(float end_radius)
{
m_end_radius = end_radius;
}
private:
virtual void paint(IntRect physical_bounding_box, PaintFunction paint) const override;
SVGRadialGradientPaintStyle(FloatPoint start_center, float start_radius, FloatPoint end_center, float end_radius)
: m_start_center(start_center)
, m_start_radius(start_radius)
, m_end_center(end_center)
, m_end_radius(end_radius)
{
}
FloatPoint m_start_center;
float m_start_radius { 0.0f };
FloatPoint m_end_center;
float m_end_radius { 0.0f };
};
}