C# IGraphics类代码示例

 public override void Draw(IGraphics graphics)
 {
     int drawX = (int)Math.Round(X);
     int drawY = (int)Math.Round(Y);
     graphics.SetColor(255, r, g, b);
     graphics.DrawObject(Image.BigExplosion, drawX, drawY, 64, 64, animation / 4, animation % 4, angle);
 }

 public override void Draw(int size, int x, int y, IGraphics g, Pen pen, Brush brush)
 {
     int s2 = size/2;
     Point[] points = new[]{new Point(x - s2, y), new Point(x, y - s2), new Point(x + s2, y), new Point(x, y + s2)};
     g.FillPolygon(brush, points);
     g.DrawPolygon(pen, points);
 }

        /// <summary>
        /// Advances the time position and draws the current frame of the animation.
        /// </summary>
        /// <param name="gameTime">A game time</param>
        /// <param name="spriteBatch">A graphics</param>
        /// <param name="position">A position</param>
        /// <param name="spriteEffects">To flip an image</param> NOT USED
        public void Draw(GameTime gameTime, IGraphics spriteBatch, PointF position, bool spriteEffects)
        {
            if (AnimTexture == null)
               {
               throw new NotSupportedException("No animation is currently playing.");
               }

            // Process passing time.
            this.time += (float)gameTime.ElapsedTime.TotalSeconds;

            while (this.time > AnimTexture.FrameTime)
            {
                this.time -= AnimTexture.FrameTime;

                // Advance the frame index; looping or clamping as appropriate.
                if (AnimTexture.IsLooping)
                {
                    this.FrameIndex = (this.FrameIndex + 1) % AnimTexture.FrameCount;
                }
                else
                {
                    this.FrameIndex = Math.Min(this.FrameIndex + 1, AnimTexture.FrameCount - 1);
                }
            }

            // Draw the current frame.
            this.DrawFrame(spriteBatch, position, this.FrameIndex);
        }

		protected virtual void Draw (IGraphics g, int startIndex, int length, float thickness)
		{
			g.BeginEntity (this);
			
			if (length == 0) {
				
			}
			else if (length == 1) {
				var p = _points [startIndex];
				var r = thickness / 2;
				g.FillOval (p.X - r, p.Y - r, thickness, thickness);
			}
			else {			
				g.BeginLines (true);
				
				var end = startIndex + length;
				for (var i = startIndex; i < end - 1; i++) {
					g.DrawLine (
						_points [i].X,
						_points [i].Y,
						_points [i + 1].X,
						_points [i + 1].Y,
						thickness);
				}
				
				g.EndLines ();
			}
		}

 public override void Draw(int size, float x, float y, IGraphics g, Pen2 pen, Brush2 brush)
 {
     int s2 = size/2;
     Point2[] points = {new Point2(x - s2, y), new Point2(x, y - s2), new Point2(x + s2, y), new Point2(x, y + s2)};
     g.FillPolygon(brush, points);
     g.DrawPolygon(pen, points);
 }

        /// <summary>
        /// Paints the fragment
        /// </summary>
        /// <param name="g">the device to draw to</param>
        protected override void PaintImp(IGraphics g)
        {
            var offset = HtmlContainer != null ? HtmlContainer.ScrollOffset : PointF.Empty;
            var rect = new RectangleF(Bounds.X + offset.X, Bounds.Y + offset.Y, Bounds.Width, Bounds.Height);

            if (rect.Height > 2 && RenderUtils.IsColorVisible(ActualBackgroundColor))
            {
                g.FillRectangle(RenderUtils.GetSolidBrush(ActualBackgroundColor), rect.X, rect.Y, rect.Width, rect.Height);
            }

            var b1 = RenderUtils.GetSolidBrush(ActualBorderTopColor);
            BordersDrawHandler.DrawBorder(Border.Top, g, this, b1, rect);

            if (rect.Height > 1)
            {
                var b2 = RenderUtils.GetSolidBrush(ActualBorderLeftColor);
                BordersDrawHandler.DrawBorder(Border.Left, g, this, b2, rect);

                var b3 = RenderUtils.GetSolidBrush(ActualBorderRightColor);
                BordersDrawHandler.DrawBorder(Border.Right, g, this, b3, rect);

                var b4 = RenderUtils.GetSolidBrush(ActualBorderBottomColor);
                BordersDrawHandler.DrawBorder(Border.Bottom, g, this, b4, rect);
            }
        }

 public override void Draw(IGraphics graphics)
 {
     int drawX = (int)Math.Round(X);
     int drawY = (int)Math.Round(Y);
     graphics.SetColor(255, 255, 255, 255);
     graphics.DrawObject(Image.Mushi, drawX, drawY, 32, 64, type, animation % 3 == 1 ? 1 : 0, angle);
 }

 /// <summary>
 /// Clip the region the graphics will draw on by the overflow style of the containing block.<br/>
 /// Recursively travel up the tree to find containing block that has overflow style set to hidden. if not
 /// block found there will be no clipping and null will be returned.
 /// </summary>
 /// <param name="g">the graphics to clip</param>
 /// <param name="box">the box that is rendered to get containing blocks</param>
 /// <returns>the prev region if clipped, otherwise null</returns>
 public static RectangleF ClipGraphicsByOverflow(IGraphics g, CssBox box)
 {
     var containingBlock = box.ContainingBlock;
     while (true)
     {
         if (containingBlock.Overflow == CssConstants.Hidden)
         {
             var prevClip = g.GetClip();
             var rect = box.ContainingBlock.ClientRectangle;
             rect.X -= 2; // atodo: find better way to fix it
             rect.Width += 2;
             rect.Offset(box.HtmlContainer.ScrollOffset);
             rect.Intersect(prevClip);
             g.SetClip(rect);
             return prevClip;
         }
         else
         {
             var cBlock = containingBlock.ContainingBlock;
             if (cBlock == containingBlock)
                 return RectangleF.Empty;
             containingBlock = cBlock;
         }
     }
 }

        /// <summary>
        /// Function to render the actual map decoration
        /// </summary>
        /// <param name="g"></param>
        /// <param name="map"></param>
        protected override void OnRender(IGraphics g, Map map)
        {
            // Render the rosetta
            base.OnRender(g, map);
            
            var clip = g.ClipBounds;
            var oldTransform = g.Transform;
            var newTransform = new Matrix(1f, 0f, 0f, 1f, clip.Left + Size.Width*0.5f, clip.Top + Size.Height*0.5f);

            g.Transform = newTransform;

            var width = Size.Width;
            var height = Size.Height;
            var pts = new[]
                          {
                              new PointF(0f, -0.35f*height),
                              new PointF(0.125f*width, 0.35f*height),
                              new PointF(0f, 0.275f*height),
                              new PointF(-0.125f*width, 0.35f*height),
                              new PointF(0f, -0.35f*height),
                          };

            // need to outline the needle
            if (NeedleOutlineWidth>0)
            {
                g.DrawPolygon(new Pen(OpacityColor(NeedleOutlineColor), NeedleOutlineWidth), pts);
            }

            // need to outline the needle
            g.FillPolygon(new SolidBrush(OpacityColor(NeedleFillColor)), pts );

            g.Transform = oldTransform;

        }

        public IndexBuffer(IGraphics graphics)
        {
            _graphics = graphics as Graphics;

            _graphics.MakeCurrent();
            GL.GenBuffers(1, out id);
        }

        public override void DrawSmoothFilledCurve(IGraphics g, GraphPane pane, CurveItem curve, float scaleFactor)
        {
            base.DrawSmoothFilledCurve(g, pane, curve, scaleFactor);

            // Draw the curve at the bottom of the graph.
            DrawCurve(g, pane, curve, scaleFactor, GetPointsForLowPointsArray(curve));
        }

 /// <summary>
 /// Do all rendering associated with this <see cref="CurveItem"/> to the specified
 /// <see cref="Graphics"/> device.  This method is normally only
 /// called by the Draw method of the parent <see cref="ZedGraph.CurveList"/>
 /// collection object.
 /// </summary>
 /// <param name="g">
 /// A graphic device object to be drawn into.  This is normally e.Graphics from the
 /// PaintEventArgs argument to the Paint() method.
 /// </param>
 /// <param name="pane">
 /// A reference to the <see cref="ZedGraph.GraphPane"/> object that is the parent or
 /// owner of this object.
 /// </param>
 /// <param name="pos">The ordinal position of the current <see cref="Bar"/>
 /// curve.</param>
 /// <param name="scaleFactor">
 /// The scaling factor to be used for rendering objects.  This is calculated and
 /// passed down by the parent <see cref="ZedGraph.GraphPane"/> object using the
 /// <see cref="PaneBase.CalcScaleFactor"/> method, and is used to proportionally adjust
 /// font sizes, etc. according to the actual size of the graph.
 /// </param>
 public override void Draw(IGraphics g, GraphPane pane, int pos, float scaleFactor)
 {
     if (IsXAxisMarker)
         DrawXMarker(pane, g);
     else
         DrawYMarker(pane, g);
 }

 /// <summary>
 /// Run game logic here such as updating the world,
 /// checking for collisions, handling input and drawing the game.
 /// This method will be called as frequently as possible,
 /// when the Windows message queue is empty.
 /// Check GameTime to get the elapsed time since the last update.
 /// </summary>
 /// <param name="gameTime">Game time</param>
 /// <param name="renderer">A Renderer</param>
 /// <param name="keyboardState">A keyboard state</param>
 public void Run(GameTime gameTime, IGraphics renderer, IControllerState keyboardState)
 {
     if (this.levelStat == LevelChangeStatus.NoChange)
     {
         if (Collisions.GetPlayerTile(this.level.Player) == TileType.Next)
         {
             this.level.LevelIndex++;
             this.levelStat = LevelChangeStatus.Change;
         }
         else if (Collisions.GetPlayerTile(this.level.Player) == TileType.Back)
         {
             this.level.LevelIndex--;
             this.levelStat = LevelChangeStatus.Change;
         }
         else
         {
             this.level.Update(gameTime, keyboardState);
             this.level.Draw(gameTime, renderer);
         }
     }
     else
     {
         this.level.UpdateLevel();
         this.levelStat = LevelChangeStatus.NoChange;
     }
 }

 public override void Draw(IGraphics graphics)
 {
     int drawX = (int)Math.Round(X);
     int drawY = (int)Math.Round(Y);
     graphics.SetColor(255, type == 0 ? 255 : 0, type == 1 ? 255 : 0, type == 2 ? 255 : 0);
     graphics.DrawObject(Image.Teki, drawX, drawY, 32, 32, 0, 0, angle);
 }

 protected override void OnRenderInternal(Map map, IPolygon polygon, IGraphics g)
 {
     IPoint pt = polygon.Centroid;
     Point renderingOrigin = Point.Truncate(Transform.WorldtoMap(pt.Coordinate, map));
     g.RenderingOrigin = new PointStruct(renderingOrigin.X, renderingOrigin.Y);
     base.OnRenderInternal(map, polygon, g);
 }