Flutter Impeller
sweep_gradient_contents.h
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1 // Copyright 2013 The Flutter Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
5 #ifndef FLUTTER_IMPELLER_ENTITY_CONTENTS_SWEEP_GRADIENT_CONTENTS_H_
6 #define FLUTTER_IMPELLER_ENTITY_CONTENTS_SWEEP_GRADIENT_CONTENTS_H_
7 
8 #include <vector>
9 
11 #include "impeller/entity/entity.h"
15 
16 namespace impeller {
17 
19  public:
21 
23 
24  // |Contents|
25  bool IsOpaque(const Matrix& transform) const override;
26 
27  // |Contents|
28  bool Render(const ContentContext& renderer,
29  const Entity& entity,
30  RenderPass& pass) const override;
31 
32  // |Contents|
33  [[nodiscard]] bool ApplyColorFilter(
34  const ColorFilterProc& color_filter_proc) override;
35 
36  void SetCenterAndAngles(Point center, Degrees start_angle, Degrees end_angle);
37 
38  void SetColors(std::vector<Color> colors);
39 
40  void SetStops(std::vector<Scalar> stops);
41 
42  void SetTileMode(Entity::TileMode tile_mode);
43 
44  const std::vector<Color>& GetColors() const;
45 
46  const std::vector<Scalar>& GetStops() const;
47 
48  private:
49  bool RenderTexture(const ContentContext& renderer,
50  const Entity& entity,
51  RenderPass& pass) const;
52 
53  bool RenderSSBO(const ContentContext& renderer,
54  const Entity& entity,
55  RenderPass& pass) const;
56 
57  bool RenderUniform(const ContentContext& renderer,
58  const Entity& entity,
59  RenderPass& pass) const;
60 
61  Point center_;
62  Scalar bias_;
63  Scalar scale_;
64  std::vector<Color> colors_;
65  std::vector<Scalar> stops_;
66  Entity::TileMode tile_mode_;
67  Color decal_border_color_ = Color::BlackTransparent();
68 
70 
71  SweepGradientContents& operator=(const SweepGradientContents&) = delete;
72 };
73 
74 } // namespace impeller
75 
76 #endif // FLUTTER_IMPELLER_ENTITY_CONTENTS_SWEEP_GRADIENT_CONTENTS_H_
std::function< Color(Color)> ColorFilterProc
Definition: contents.h:35
Render passes encode render commands directed as one specific render target into an underlying comman...
Definition: render_pass.h:30
void SetTileMode(Entity::TileMode tile_mode)
void SetCenterAndAngles(Point center, Degrees start_angle, Degrees end_angle)
bool Render(const ContentContext &renderer, const Entity &entity, RenderPass &pass) const override
bool ApplyColorFilter(const ColorFilterProc &color_filter_proc) override
If possible, applies a color filter to this contents inputs on the CPU.
bool IsOpaque(const Matrix &transform) const override
Whether this Contents only emits opaque source colors from the fragment stage. This value does not ac...
const std::vector< Color > & GetColors() const
const std::vector< Scalar > & GetStops() const
void SetStops(std::vector< Scalar > stops)
void SetColors(std::vector< Color > colors)
float Scalar
Definition: scalar.h:19
static constexpr Color BlackTransparent()
Definition: color.h:270
A 4x4 matrix using column-major storage.
Definition: matrix.h:37