65 lines
2.0 KiB
C++
65 lines
2.0 KiB
C++
#pragma once
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#include <frostbite2D/2d/sprite.h>
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#include <frostbite2D/graphics/camera.h>
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#include <frostbite2D/graphics/render_texture.h>
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#include <functional>
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namespace frostbite2D {
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/// @brief 离屏画布节点。
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///
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/// 子节点通过 `AddCanvasChild()` 挂到内部画布树，只会在重绘到离屏纹理时参与渲染，
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/// 不会像普通场景子节点那样直接显示到屏幕。
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class CanvasActor : public Sprite {
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public:
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CanvasActor();
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~CanvasActor() override = default;
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bool Init(int width, int height);
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bool SetCanvasSize(int width, int height);
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Vec2 GetCanvasSize() const {
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return Vec2(static_cast<float>(canvasWidth_), static_cast<float>(canvasHeight_));
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}
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void SetClearColor(const Color& color);
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const Color& GetClearColor() const { return clearColor_; }
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void SetDirty();
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bool IsDirty() const { return dirty_; }
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bool Redraw();
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void SetCustomDrawCallback(std::function<void()> callback);
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void ClearCustomDrawCallback();
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void AddCanvasChild(RefPtr<Actor> child);
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void RemoveCanvasChild(RefPtr<Actor> child);
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void RemoveAllCanvasChildren();
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Actor* GetCanvasRoot() const { return canvasRoot_.Get(); }
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ActorList& GetCanvasChildren() { return canvasRoot_->GetChildren(); }
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const ActorList& GetCanvasChildren() const { return canvasRoot_->GetChildren(); }
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Ptr<Texture> GetOutputTexture() const;
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Ptr<RenderTexture> GetRenderTexture() const { return renderTexture_; }
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bool IsCanvasReady() const { return renderTexture_ && renderTexture_->IsValid(); }
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Camera& GetCanvasCamera() { return canvasCamera_; }
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const Camera& GetCanvasCamera() const { return canvasCamera_; }
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void OnUpdate(float deltaTime) override;
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void Render() override;
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private:
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bool redrawInternal();
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void syncCanvasResources();
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RefPtr<Actor> canvasRoot_;
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Ptr<RenderTexture> renderTexture_ = nullptr;
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Camera canvasCamera_;
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Color clearColor_ = Colors::Transparent;
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int canvasWidth_ = 0;
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int canvasHeight_ = 0;
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bool dirty_ = true;
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std::function<void()> customDrawCallback_;
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};
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} // namespace frostbite2D
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