Magic_Game/src/kiwano/2d/Canvas.h

// Copyright (c) 2016-2018 Kiwano - Nomango
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

#pragma once
#include <kiwano/2d/Actor.h>
#include <kiwano/render/GeometrySink.h>
#include <kiwano/render/RenderContext.h>

namespace kiwano
{
KGE_DECLARE_SMART_PTR(Canvas);

/**
 * \addtogroup Actors
 * @{
 */

/**
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 * @brief <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڻ<EFBFBD><EFBFBD><EFBFBD>ͼԪ
 */
class KGE_API Canvas : public Actor
{
public:
    /// \~chinese
    /// @brief <20><><EFBFBD><EFBFBD><EFBFBD>ջ<EFBFBD><D5BB><EFBFBD>
    Canvas();

    virtual ~Canvas();

    /// \~chinese
    /// @brief <20><>ʼ<EFBFBD><CABC>ͼ
    void BeginDraw();

    /// \~chinese
    /// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͼ
    void EndDraw();

    /// \~chinese
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    /// @param begin <20>߶<EFBFBD><DFB6><EFBFBD><EFBFBD><EFBFBD>
    /// @param end <20>߶<EFBFBD><DFB6>յ<EFBFBD>
    void DrawLine(Point const& begin, Point const& end);

    /// \~chinese
    /// @brief <20><>Բ<EFBFBD>α߿<CEB1>
    /// @param center Բ<><D4B2>ԭ<EFBFBD><D4AD>
    /// @param radius Բ<>ΰ뾶
    void DrawCircle(Point const& center, float radius);

    /// \~chinese
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    /// @param center <20><>Բԭ<D4B2><D4AD>
    /// @param radius <20><>Բ<EFBFBD>뾶
    void DrawEllipse(Point const& center, Vec2 const& radius);

    /// \~chinese
    /// @brief <20><><EFBFBD><EFBFBD><EFBFBD>α߿<CEB1>
    /// @param rect <20><><EFBFBD><EFBFBD>
    void DrawRect(Rect const& rect);

    /// \~chinese
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    /// @param rect <20><><EFBFBD><EFBFBD>
    /// @param radius <20><><EFBFBD><EFBFBD>Բ<EFBFBD>ǰ뾶
    void DrawRoundedRect(Rect const& rect, Vec2 const& radius);

    /// \~chinese
    /// @brief <20><><EFBFBD><EFBFBD>Բ<EFBFBD><D4B2>
    /// @param center Բ<><D4B2>ԭ<EFBFBD><D4AD>
    /// @param radius Բ<>ΰ뾶
    void FillCircle(Point const& center, float radius);

    /// \~chinese
    /// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Բ<EFBFBD><D4B2>
    /// @param center <20><>Բԭ<D4B2><D4AD>
    /// @param radius <20><>Բ<EFBFBD>뾶
    void FillEllipse(Point const& center, Vec2 const& radius);

    /// \~chinese
    /// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    /// @param rect <20><><EFBFBD><EFBFBD>
    void FillRect(Rect const& rect);

    /// \~chinese
    /// @brief <20><><EFBFBD><EFBFBD>Բ<EFBFBD>Ǿ<EFBFBD><C7BE><EFBFBD>
    /// @param rect <20><><EFBFBD><EFBFBD>
    /// @param radius <20><><EFBFBD><EFBFBD>Բ<EFBFBD>ǰ뾶
    void FillRoundedRect(Rect const& rect, Vec2 const& radius);

    /// \~chinese
    /// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    /// @param texture <20><><EFBFBD><EFBFBD>
    /// @param src_rect <20><><EFBFBD><EFBFBD><EFBFBD>ü<EFBFBD><C3BC><EFBFBD><EFBFBD><EFBFBD>
    /// @param dest_rect <20><><EFBFBD><EFBFBD>Ŀ<EFBFBD><C4BF><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    void DrawTexture(TexturePtr texture, const Rect* src_rect = nullptr, const Rect* dest_rect = nullptr);

    /// \~chinese
    /// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֲ<EFBFBD><D6B2><EFBFBD>
    /// @param text <20><><EFBFBD><EFBFBD>
    /// @param point <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD>λ<EFBFBD><CEBB>
    void DrawTextLayout(String const& text, Point const& point);

    /// \~chinese
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    /// @param layout <20><><EFBFBD>ֲ<EFBFBD><D6B2><EFBFBD>
    /// @param point <20><><EFBFBD>Ʋ<EFBFBD><C6B2>ֵ<EFBFBD>λ<EFBFBD><CEBB>
    void DrawTextLayout(TextLayout const& layout, Point const& point);

    /// \~chinese
    /// @brief <20><>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD>·<EFBFBD><C2B7>
    /// @param begin_pos ·<><C2B7><EFBFBD><EFBFBD>ʼ<EFBFBD><CABC>
    void BeginPath(Point const& begin_pos);

    /// \~chinese
    /// @brief <20><><EFBFBD><EFBFBD>·<EFBFBD><C2B7>
    /// @param closed ·<><C2B7><EFBFBD>Ƿ<EFBFBD><C7B7>պ<EFBFBD>
    void EndPath(bool closed = false);

    /// \~chinese
    /// @brief <20><><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD>߶<EFBFBD>
    /// @param point <20>˵<EFBFBD>
    void AddLine(Point const& point);

    /// \~chinese
    /// @brief <20><><EFBFBD>Ӷ<EFBFBD><D3B6><EFBFBD><EFBFBD>߶<EFBFBD>
    /// @param points <20>˵㼯<CBB5><E3BCAF>
    void AddLines(Vector<Point> const& points);

    /// \~chinese
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    /// @param point1 <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ߵĵ<DFB5>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD>
    /// @param point2 <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ߵĵڶ<C4B5><DAB6><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD>
    /// @param point3 <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ߵ<EFBFBD><DFB5>յ<EFBFBD>
    void AddBezier(Point const& point1, Point const& point2, Point const& point3);

    /// \~chinese
    /// @brief <20><><EFBFBD>ӻ<EFBFBD><D3BB><EFBFBD>
    /// @param point <20>յ<EFBFBD>
    /// @param radius <20><>Բ<EFBFBD>뾶
    /// @param rotation <20><>Բ<EFBFBD><D4B2>ת<EFBFBD>Ƕ<EFBFBD>
    /// @param clockwise ˳ʱ<CBB3><CAB1> or <20><>ʱ<EFBFBD><CAB1>
    /// @param is_small <20>Ƿ<EFBFBD>ȡС<C8A1><D0A1> 180<38><30> <20>Ļ<EFBFBD>
    void AddArc(Point const& point, Size const& radius, float rotation, bool clockwise = true, bool is_small = true);

    /// \~chinese
    /// @brief <20><><EFBFBD><EFBFBD><EFBFBD>ߵķ<DFB5>ʽ<EFBFBD><CABD><EFBFBD><EFBFBD>·<EFBFBD><C2B7>
    void StrokePath();

    /// \~chinese
    /// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ķ<EFBFBD>ʽ<EFBFBD><CABD><EFBFBD><EFBFBD>·<EFBFBD><C2B7>
    void FillPath();

    /// \~chinese
    /// @brief <20><><EFBFBD>ջ<EFBFBD><D5BB><EFBFBD>
    void Clear();

    /// \~chinese
    /// @brief <20><><EFBFBD>ջ<EFBFBD><D5BB><EFBFBD>
    /// @param clear_color <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɫ
    void Clear(Color const& clear_color);

    /// \~chinese
    /// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɫ
    /// @param color <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɫ
    void SetFillColor(Color const& color);

    /// \~chinese
    /// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>仭ˢ
    /// @param[in] brush <20><><EFBFBD>仭ˢ
    void SetFillBrush(BrushPtr brush);

    /// \~chinese
    /// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɫ
    /// @param color <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɫ
    void SetStrokeColor(Color const& color);

    /// \~chinese
    /// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ˢ
    /// @param[in] brush <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ˢ
    void SetStrokeBrush(BrushPtr brush);

    /// \~chinese
    /// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    /// @param width <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    void SetStrokeWidth(float width);

    /// \~chinese
    /// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʽ
    /// @param stroke_style <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʽ
    void SetStrokeStyle(const StrokeStyle& stroke_style);

    /// \~chinese
    /// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֻ<EFBFBD>ˢ<EFBFBD><CBA2>ʽ
    /// @param text_style <20><><EFBFBD>ֻ<EFBFBD>ˢ<EFBFBD><CBA2>ʽ
    void SetTextStyle(TextStyle const& text_style);

    /// \~chinese
    /// @brief <20><><EFBFBD>û<EFBFBD>ˢ
    /// @param[in] brush <20><>ˢ
    void SetBrush(BrushPtr brush);

    /// \~chinese
    /// @brief <20><><EFBFBD>û<EFBFBD>ˢ<EFBFBD><CBA2>ά<EFBFBD>任
    /// @param transform <20><>ά<EFBFBD>任
    void SetBrushTransform(Transform const& transform);

    /// \~chinese
    /// @brief <20><><EFBFBD>û<EFBFBD>ˢ<EFBFBD><CBA2>ά<EFBFBD>任<EFBFBD><E4BBBB><EFBFBD><EFBFBD>
    /// @param transform <20><>ά<EFBFBD>任<EFBFBD><E4BBBB><EFBFBD><EFBFBD>
    void SetBrushTransform(Matrix3x2 const& transform);

    /// \~chinese
    /// @brief <20><><EFBFBD><EFBFBD>һ<EFBFBD><D2BB>ͼ<EFBFBD><CDBC>
    /// @param area ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    void PushLayerArea(LayerArea& area);

    /// \~chinese
    /// @brief ɾ<><C9BE><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӵ<EFBFBD>ͼ<EFBFBD><CDBC>
    void PopLayerArea();

    /// \~chinese
    /// @brief <20><><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD>ü<EFBFBD><C3BC><EFBFBD><EFBFBD><EFBFBD>
    /// @param clip_rect <20>ü<EFBFBD><C3BC><EFBFBD><EFBFBD><EFBFBD>
    void PushClipRect(Rect const& clip_rect);

    /// \~chinese
    /// @brief ɾ<><C9BE><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӵIJü<C4B2><C3BC><EFBFBD><EFBFBD><EFBFBD>
    void PopClipRect();

    /// \~chinese
    /// @brief <20><>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    float GetStrokeWidth() const;

    /// \~chinese
    /// @brief <20><>ȡ<EFBFBD><C8A1><EFBFBD>仭ˢ
    BrushPtr GetFillBrush() const;

    /// \~chinese
    /// @brief <20><>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ˢ
    BrushPtr GetStrokeBrush() const;

    /// \~chinese
    /// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    TexturePtr ExportToTexture() const;

    void OnRender(RenderContext& ctx) override;

private:
    void InitRenderTargetAndBrushs();

    void UpdateCache() const;

private:
    float        stroke_width_;
    TextStyle    text_style_;
    StrokeStyle  stroke_style_;
    GeometrySink geo_sink_;
    BrushPtr     fill_brush_;
    BrushPtr     stroke_brush_;

    mutable bool                    cache_expired_;
    mutable TexturePtr              texture_cached_;
    mutable TextureRenderContextPtr ctx_;
};

/** @} */

inline void Canvas::SetStrokeWidth(float width)
{
    stroke_width_ = std::max(width, 0.f);
}

inline void Canvas::SetStrokeStyle(const StrokeStyle& stroke_style)
{
    stroke_style_ = stroke_style;
}

inline void Canvas::SetTextStyle(TextStyle const& text_style)
{
    text_style_ = text_style;
}

inline void Canvas::SetStrokeColor(Color const& color)
{
    InitRenderTargetAndBrushs();
    stroke_brush_->SetColor(color);
}

inline void Canvas::SetFillColor(Color const& color)
{
    InitRenderTargetAndBrushs();
    fill_brush_->SetColor(color);
}

inline void Canvas::SetFillBrush(BrushPtr brush)
{
    fill_brush_ = brush;
}

inline void Canvas::SetStrokeBrush(BrushPtr brush)
{
    stroke_brush_ = brush;
}

inline BrushPtr Canvas::GetFillBrush() const
{
    return fill_brush_;
}

inline BrushPtr Canvas::GetStrokeBrush() const
{
    return stroke_brush_;
}
}  // namespace kiwano