fb4bce8322
Currently, gradients are PaintNode subclasses - which limits their applicability to leaf DAG nodes. In order to support generalized gradient/shader effects: * introduce a new Shader base class * refactor gradients as Shader subclasses * introduce ShaderPaint (to support current Gradient-as-paint use) * introduce ShaderEffect (to support future Gradient-as-effect use) Tangentially: * rename SkSGPaintNode.h -> SkSGPaint.h * consolidate sksg::Color into SkSGPaint.h Change-Id: I94ba949f4504c09cfde4a4f030d927411fdd66a2 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/205263 Reviewed-by: Mike Reed <reed@google.com> Commit-Queue: Florin Malita <fmalita@chromium.org>
102 lines
2.3 KiB
C++
102 lines
2.3 KiB
C++
/*
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* Copyright 2017 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkSGPaint_DEFINED
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#define SkSGPaint_DEFINED
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#include "SkSGNode.h"
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#include "SkColor.h"
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#include "SkPaint.h"
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namespace sksg {
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class Shader;
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/**
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* Base class for nodes which provide a 'paint' (as opposed to geometry) for
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* drawing (e.g. colors, gradients, patterns).
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*
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* Roughly equivalent to Skia's SkPaint.
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*/
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class PaintNode : public Node {
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public:
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SkPaint makePaint() const;
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SG_ATTRIBUTE(AntiAlias , bool , fAntiAlias )
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SG_ATTRIBUTE(Opacity , SkScalar , fOpacity )
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SG_ATTRIBUTE(BlendMode , SkBlendMode , fBlendMode )
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SG_ATTRIBUTE(StrokeWidth, SkScalar , fStrokeWidth)
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SG_ATTRIBUTE(StrokeMiter, SkScalar , fStrokeMiter)
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SG_ATTRIBUTE(Style , SkPaint::Style, fStyle )
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SG_ATTRIBUTE(StrokeJoin , SkPaint::Join , fStrokeJoin )
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SG_ATTRIBUTE(StrokeCap , SkPaint::Cap , fStrokeCap )
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protected:
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PaintNode();
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virtual void onApplyToPaint(SkPaint*) const = 0;
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private:
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SkScalar fOpacity = 1,
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fStrokeWidth = 1,
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fStrokeMiter = 4;
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bool fAntiAlias = false;
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SkBlendMode fBlendMode = SkBlendMode::kSrcOver;
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SkPaint::Style fStyle = SkPaint::kFill_Style;
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SkPaint::Join fStrokeJoin = SkPaint::kMiter_Join;
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SkPaint::Cap fStrokeCap = SkPaint::kButt_Cap;
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typedef Node INHERITED;
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};
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/**
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* Concrete Paint node, wrapping an SkColor.
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*/
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class Color : public PaintNode {
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public:
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static sk_sp<Color> Make(SkColor c);
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SG_ATTRIBUTE(Color, SkColor, fColor)
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protected:
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SkRect onRevalidate(InvalidationController*, const SkMatrix&) override;
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void onApplyToPaint(SkPaint*) const override;
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private:
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explicit Color(SkColor);
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SkColor fColor;
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};
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/**
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* Shader-based paint.
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*/
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class ShaderPaint final : public PaintNode {
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public:
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~ShaderPaint() override;
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static sk_sp<ShaderPaint> Make(sk_sp<Shader>);
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protected:
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SkRect onRevalidate(InvalidationController*, const SkMatrix&) override;
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void onApplyToPaint(SkPaint*) const override;
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private:
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explicit ShaderPaint(sk_sp<Shader>);
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const sk_sp<Shader> fShader;
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using INHERITED = PaintNode;
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};
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} // namespace sksg
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#endif // SkSGPaint_DEFINED
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