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 "Actor.h"
#include "Font.hpp"
#include "TextStyle.hpp"
#include "../renderer/Image.h"
#include "../renderer/TextRenderer.h"

#ifdef DrawText
#	undef DrawText
#endif

namespace kiwano
{
	// »­²¼
	class KGE_API Canvas
		: public Actor
	{
	public:
		Canvas();

		Canvas(
			Size const& size
		);

		Canvas(
			float width,
			float height
		);

		virtual ~Canvas();

		// ¿ªÊ¼»æͼ
		void BeginDraw();

		// ½áÊø»æͼ
		void EndDraw();

		// »­Ö±Ïß
		void DrawLine(
			const Point& begin,
			const Point& end
		);

		// »­Ô²Ðα߿ò
		void DrawCircle(
			const Point& center,
			float radius
		);

		// »­ÍÖÔ²Ðα߿ò
		void DrawEllipse(
			const Point& center,
			float radius_x,
			float radius_y
		);

		// »­¾ØÐα߿ò
		void DrawRect(
			const Rect& rect
		);

		// »­Ô²½Ç¾ØÐα߿ò
		void DrawRoundedRect(
			const Rect& rect,
			float radius_x,
			float radius_y
		);

		// »­Í¼Æ¬
		void DrawImage(
			ImagePtr image,
			float opacity = 1.f
		);

		// »­ÎÄ×Ö
		void DrawText(
			String const& text,		/* ÎÄ×Ö */
			Point const& point		/* ÎÄ×ÖλÖà */
		);

		// Ìî³äÔ²ÐÎ
		void FillCircle(
			const Point& center,
			float radius
		);

		// Ìî³äÍÖÔ²ÐÎ
		void FillEllipse(
			const Point& center,
			float radius_x,
			float radius_y
		);

		// Ìî³ä¾ØÐÎ
		void FillRect(
			const Rect& rect
		);

		// Ìî³äÔ²½Ç¾ØÐÎ
		void FillRoundedRect(
			const Rect& rect,
			float radius_x,
			float radius_y
		);

		// ¿ªÊ¼»æÖÆ·¾¶
		void BeginPath(
			Point const& begin_pos	/* ·¾¶Æðʼµã */
		);

		// ½áÊø·¾¶
		void EndPath(
			bool closed = true		/* ·¾¶ÊÇ·ñ±ÕºÏ */
		);

		// Ìí¼ÓÒ»ÌõÏ߶Î
		void AddLine(
			Point const& point		/* ¶Ëµã */
		);

		// Ìí¼Ó¶àÌõÏ߶Î
		void AddLines(
			Vector<Point> const& points
		);

		// Ìí¼ÓÒ»ÌõÈý´Î·½±´Èû¶ûÇúÏß
		void AddBezier(
			Point const& point1,	/* ±´Èû¶ûÇúÏߵĵÚÒ»¸ö¿ØÖƵã */
			Point const& point2,	/* ±´Èû¶ûÇúÏߵĵڶþ¸ö¿ØÖƵã */
			Point const& point3		/* ±´Èû¶ûÇúÏßµÄÖÕµã */
		);

		// Ìí¼Ó»¡Ïß
		void AddArc(
			Point const& point,		/* ÖÕµã */
			Point const& radius,	/* ÍÖÔ²°ë¾¶ */
			float rotation,			/* ÍÖÔ²Ðýת½Ç¶È */
			bool clockwise = true,	/* ˳ʱÕë or ÄæʱÕë */
			bool is_small = true	/* ÊÇ·ñȡСÓÚ 180¡ã µÄ»¡ */
		);

		// ·¾¶Ãè±ß
		void StrokePath();

		// ·¾¶Ìî³ä
		void FillPath();

		// Çå¿Õ»­²¼
		void Clear();

		// ÉèÖÃÌî³äÑÕÉ«
		void SetFillColor(
			const Color& color
		);

		// ÉèÖÃÏßÌõÑÕÉ«
		void SetStrokeColor(
			const Color& color
		);

		// ÉèÖÃÏßÌõ¿í¶È
		void SetStrokeWidth(
			float width
		);

		// ÉèÖÃÏßÌõÏཻÑùʽ
		void SetOutlineJoinStyle(
			StrokeStyle outline_join
		);

		// ÉèÖÃÎÄ×Ö»­Ë¢Ñùʽ
		void SetTextStyle(
			Font const& font,
			TextStyle const& text_style
		);

		// »ñÈ¡Ìî³äÑÕÉ«
		Color GetFillColor() const;

		// »ñÈ¡ÏßÌõÑÕÉ«
		Color GetStrokeColor() const;

		// »ñÈ¡ÏßÌõ¿í¶È
		float GetStrokeWidth() const;

		// ±ä»»»­±Ê
		void SetBrushTransform(
			Matrix3x2 const& transform
		);

		// µ¼³öΪͼƬ
		ImagePtr ExportToImage() const;

		void OnRender(Renderer* renderer) override;

	protected:
		ComPtr<ID2D1Bitmap> const& GetBitmap() const;

	protected:
		float						stroke_width_;
		Font						text_font_;
		TextStyle					text_style_;

		ComPtr<ID2D1PathGeometry>		current_geometry_;
		ComPtr<ID2D1GeometrySink>		current_sink_;
		ComPtr<ID2D1StrokeStyle>		outline_join_style_;
		ComPtr<ID2D1SolidColorBrush>	fill_brush_;
		ComPtr<ID2D1SolidColorBrush>	stroke_brush_;
		ComPtr<IDWriteTextFormat>		text_format_;
		ComPtr<ITextRenderer>			text_renderer_;
		ComPtr<ID2D1BitmapRenderTarget>	render_target_;

		mutable bool					cache_expired_;
		mutable ComPtr<ID2D1Bitmap>		bitmap_cached_;
	};
}