/*
文件名:CanvasObject.nut
路径:Core/BaseClass/CanvasObject.nut
创建日期:2025-01-05	21:43
文件用途:画布类
*/
class CL_CanvasObject extends CL_BaseObject {

    //宽
    CanvasWidth = 0;
    //高
    CanvasHeight = 0;
    //上下文
    Context = null;

    function _typeof() {
        return "canvas";
    }

    constructor(...) {
        local C_Object;
        //创建空精灵
        if (vargv.len() == 0) {
            C_Object = Canvas_Create();
            base.constructor(C_Object);
        }
        //通过精灵指针创建
        else if (vargv.len() == 1) {
            C_Object = vargv[0];
            base.constructor(C_Object, true);
        }
    }

    //重设大小并清空
    function ResizeAndClear(W, H) {
        CanvasWidth = W;
        CanvasHeight = H;
        Canvas_ResizeAndClear(this.C_Object, W, H);
        RefreshContext();
    }

    //清空画布
    function Clear() {
        Canvas_ResizeAndClear(this.C_Object, CanvasWidth, CanvasHeight);
        RefreshContext();
    }

    //刷新上下文
    function RefreshContext() {
        Context = Canvas_GetContext2D(this.C_Object);
    }

    //开始绘制
    function BeginDraw() {
        if (!Context) error("请先刷新上下文");
        Canvas_BeginDraw(Context);
    }

    //结束绘制
    function EndDraw() {
        if (!Context) error("请先刷新上下文");
        Canvas_EndDraw(Context);
    }

    //绘制演员
    function DrawActor(Actor, XPos = 0, YPos = 0) {
        if (!Context) error("请先刷新上下文");
        Canvas_DrawActor(this.C_Object, Context, Actor.C_Object, XPos, YPos);
    }

    //绘制精灵
    function DrawSprite(Actor, XPos = 0, YPos = 0) {
        if (!Context) error("请先刷新上下文");
        Canvas_DrawSprite(this.C_Object, Context, Actor.C_Object, XPos, YPos);
    }

    //绘制精灵帧
    function DrawSpriteFrame(SpriteFrame, XPos, YPos, Width = null, Height = null) {
        if (!Context) error("请先刷新上下文");
        local Size = SpriteFrame.GetSize();
        if (Width == null) Width = Size.w;
        if (Height == null) Height = Size.h;
        Canvas_DrawSpriteFrame(Context, SpriteFrame.C_Object, XPos, YPos, Width, Height);
    }

    //设置填充画刷
    function SetFillBrush(Color) {
        if (!Context) error("请先刷新上下文");
        Canvas_SetFillBrush(Context, Color);
    }

    //设置轮廓画刷
    function SetStrokeBrush(Color) {
        if (!Context) error("请先刷新上下文");
        Canvas_SetStrokeBrush(Context, Color);
    }

    //画线段
    function DrawLine(X1, Y1, X2, Y2) {
        if (!Context) error("请先刷新上下文");
        Canvas_DrawLine(Context, X1, Y1, X2, Y2);
    }

    //画圆
    function DrawCircle(X, Y, R) {
        if (!Context) error("请先刷新上下文");
        Canvas_DrawCircle(Context, X, Y, R);
    }

    //画矩形
    function DrawRect(X, Y, W, H) {
        if (!Context) error("请先刷新上下文");
        Canvas_DrawRect(Context, X, Y, W, H);
    }

    //导出精灵帧
    function ExportSpriteFrame() {
        local SpriteFrame = CL_SpriteFrameObject(Canvas_ExportSpriteFrame(this.C_Object));
        return SpriteFrame;
    }
}