C# Graphics.Save方法代码示例

        public override void Apply(Graphics graphics, Bitmap applyBitmap, Rectangle rect, RenderMode renderMode)
        {
            Rectangle applyRect = ImageHelper.CreateIntersectRectangle(applyBitmap.Size, rect, Invert);

            if (applyRect.Width == 0 || applyRect.Height == 0)
            {
                // nothing to do
                return;
            }
            GraphicsState state = graphics.Save();
            if (Invert)
            {
                graphics.SetClip(applyRect);
                graphics.ExcludeClip(rect);
            }
            ColorMatrix grayscaleMatrix = new ColorMatrix(new[] {
                new[] {.3f, .3f, .3f, 0, 0},
                new[] {.59f, .59f, .59f, 0, 0},
                new[] {.11f, .11f, .11f, 0, 0},
                new float[] {0, 0, 0, 1, 0},
                new float[] {0, 0, 0, 0, 1}
            });
            using (ImageAttributes ia = new ImageAttributes())
            {
                ia.SetColorMatrix(grayscaleMatrix);
                graphics.DrawImage(applyBitmap, applyRect, applyRect.X, applyRect.Y, applyRect.Width, applyRect.Height, GraphicsUnit.Pixel, ia);
            }
            graphics.Restore(state);
        }

        public static void DoVKeys(this WidgetMidiList widget, FloatRect grid, Graphics g)
        {
            var gs  = g.Save();
              // Vertical
              using (var linePen = new Pen(Color.Blue, 1)) foreach (var row in widget.GetVLines(widget.LineOffset))
              {
            var r = new FloatRect(widget.Container.X + 12, row.Top, widget.WidthGutter, widget.LineHeight);

            if (row.CanDo)
            {
              // Note-Number + Piano-KeyName
              var str = string.Format("{0:00#} {1,-3}", row.RowIndex, MKeys[row.RowIndex]);

              // create rect, then move x/y and shrinks w/h by one pixel.
              var rc = new FloatRect(grid.Left, row.Top, grid.Width, widget.LineHeight).Shrink(1);

              using (var sb = new SolidBrush(Color.FromArgb(24, row.IsIvory ? Color.White : Color.Black)))
            if (row.IsIvory) g.FillRectangle(sb, rc);

              var r2 = r.Clone();
              r2.Location = r2.Location.NegX(10);
              g.DrawText(str,Color.White,widget.Font,r2,StringAlignment.Near);

            }
              }
              g.Restore(gs);
        }

		public void Draw (Graphics graphics, Route route, bool atEnd)
		{
			if (graphics == null) return;
			if (route == null) return;
			GraphicsState state = graphics.Save();
			float direction = 0;
			PointF pos = default(PointF);
			if (atEnd)
			{
				pos = route.GetEndPoint();
				direction = ConvertDirection(route.GetEndDirection());
			}
			else
			{
				pos = route.GetStartPoint();
				direction = ConvertDirection(route.GetStartDirection());
			}
			
			// In matrix math, the correct way is to put rotation BEFORE
			// translation. However, the simple transformation maethods of
			// GDI+ works in "Prepend" mode, which reverses the order of
			// operations.
			graphics.TranslateTransform(pos.X, pos.Y);
			graphics.RotateTransform(direction);
			
			Paint(graphics);
			graphics.Restore(state);
		}

 public unsafe override void Apply(Graphics graphics, Bitmap applyBitmap, Rectangle rect, RenderMode renderMode)
 {
     int blurRadius = GetFieldValueAsInt(FieldType.BLUR_RADIUS);
     double previewQuality = GetFieldValueAsDouble(FieldType.PREVIEW_QUALITY);
     Rectangle applyRect = ImageHelper.CreateIntersectRectangle(applyBitmap.Size, rect, Invert);
     if (applyRect.Width == 0 || applyRect.Height == 0)
     {
         return;
     }
     GraphicsState state = graphics.Save();
     if (Invert)
     {
         graphics.SetClip(applyRect);
         graphics.ExcludeClip(rect);
     }
     if (GDIplus.IsBlurPossible(blurRadius))
     {
         GDIplus.DrawWithBlur(graphics, applyBitmap, applyRect, null, null, blurRadius, false);
     }
     else
     {
         using (IFastBitmap fastBitmap = FastBitmap.CreateCloneOf(applyBitmap, applyRect))
         {
             ImageHelper.ApplyBoxBlur(fastBitmap, blurRadius);
             fastBitmap.DrawTo(graphics, applyRect);
         }
     }
     graphics.Restore(state);
     return;
 }

		/// <summary>
		/// Implements the Apply code for the Brightness Filet
		/// </summary>
		/// <param name="graphics"></param>
		/// <param name="applyBitmap"></param>
		/// <param name="rect"></param>
		/// <param name="renderMode"></param>
		public override void Apply(Graphics graphics, Bitmap applyBitmap, Rectangle rect, RenderMode renderMode) {
			Rectangle applyRect = ImageHelper.CreateIntersectRectangle(applyBitmap.Size, rect, Invert);

			if (applyRect.Width == 0 || applyRect.Height == 0) {
				// nothing to do
				return;
			}
			GraphicsState state = graphics.Save();
			if (Invert) {
				graphics.SetClip(applyRect);
				graphics.ExcludeClip(rect);
			}
			using (IFastBitmap fastBitmap = FastBitmap.CreateCloneOf(applyBitmap, applyRect)) {
				Color highlightColor = GetFieldValueAsColor(FieldType.FILL_COLOR);
				for (int y = fastBitmap.Top; y < fastBitmap.Bottom; y++) {
					for (int x = fastBitmap.Left; x < fastBitmap.Right; x++) {
						Color color = fastBitmap.GetColorAt(x, y);
						color = Color.FromArgb(color.A, Math.Min(highlightColor.R, color.R), Math.Min(highlightColor.G, color.G), Math.Min(highlightColor.B, color.B));
						fastBitmap.SetColorAt(x, y, color);
					}
				}
				fastBitmap.DrawTo(graphics, applyRect.Location);
			}
			graphics.Restore(state);
		}

        /// <summary>
        /// Prints an image box onto the specified graphics.
        /// </summary>
        /// <param name="imageBox">Image box to print.</param>
        /// <param name="graphics">Graphics in which image box should be contained.</param>
        /// <param name="box">Rectangle within which the image box should be contained.</param>
        /// <param name="imageResolution">Image resolution.</param>
        public static void Print(this ImageBox imageBox, Graphics graphics, RectF box, int imageResolution)
        {
            var state = graphics.Save();

            FillBox(imageBox.FilmBox, box, graphics);

            var boxCopy = box;
            if (imageBox.FilmBox.Trim == "YES")
            {
                boxCopy.Inflate(-BORDER, -BORDER);
            }

            if (imageBox.ImageSequence != null && imageBox.ImageSequence.Contains(DicomTag.PixelData))
            {
                Image bitmap = null;
                try
                {
                    var image = new DicomImage(imageBox.ImageSequence);
                    var frame = image.RenderImage().As<Image>();

                    bitmap = frame;

                    DrawBitmap(graphics, boxCopy, bitmap, imageResolution, imageBox.FilmBox.EmptyImageDensity);
                }
                finally
                {
                    if (bitmap != null)
                    {
                        bitmap.Dispose();
                    }
                }
            }

            graphics.Restore(state);
        }

        protected void PaintTransparentBackground(Graphics g, Rectangle clipRect) {
            // check if we have a parent
            if (this.Parent != null) {
                // convert the clipRects coordinates from ours to our parents
                clipRect.Offset(this.Location);

                PaintEventArgs e = new PaintEventArgs(g, clipRect);
                GraphicsState state = g.Save();

                try {
                    // move the graphics object so that we are drawing in
                    // the correct place
                    g.TranslateTransform((float)-this.Location.X, (float)-this.Location.Y);

                    // draw the parents background and foreground
                    this.InvokePaintBackground(this.Parent, e);
                    this.InvokePaint(this.Parent, e);

                    return;
                } finally {
                    // reset everything back to where they were before
                    g.Restore(state);
                    clipRect.Offset(-this.Location.X, -this.Location.Y);
                }
            }

            // we don't have a parent, so fill the rect with
            // the default control color
            g.FillRectangle(SystemBrushes.Control, clipRect);
        }

        public override void Apply(Graphics graphics, Bitmap applyBitmap, Rectangle rect, RenderMode renderMode)
        {
            Rectangle applyRect = ImageHelper.CreateIntersectRectangle(applyBitmap.Size, rect, Invert);

            if (applyRect.Width == 0 || applyRect.Height == 0)
            {
                // nothing to do
                return;
            }
            int magnificationFactor = GetFieldValueAsInt(FieldType.MAGNIFICATION_FACTOR);
            GraphicsState state = graphics.Save();
            if (Invert)
            {
                graphics.SetClip(applyRect);
                graphics.ExcludeClip(rect);
            }
            graphics.SmoothingMode = SmoothingMode.None;
            graphics.InterpolationMode = InterpolationMode.NearestNeighbor;
            graphics.CompositingQuality = CompositingQuality.HighQuality;
            graphics.PixelOffsetMode = PixelOffsetMode.None;
            int halfWidth = rect.Width / 2;
            int halfHeight = rect.Height / 2;
            int newWidth = rect.Width / magnificationFactor;
            int newHeight = rect.Height / magnificationFactor;
            Rectangle source = new Rectangle(rect.X + halfWidth - (newWidth / 2), rect.Y + halfHeight - (newHeight / 2), newWidth, newHeight);
            graphics.DrawImage(applyBitmap, rect, source, GraphicsUnit.Pixel);
            graphics.Restore(state);
        }

		public virtual void DrawToGraphics (Graphics graphics, float x, float y, float scaleX, float scaleY)
		{
			if (graphics == null) return;

			GraphicsState state = graphics.Save();
			graphics.TranslateTransform (x, y);
			graphics.ScaleTransform(scaleX, scaleY);
			Draw(graphics);
			//graphics.DrawRectangle(Pens.Magenta, 0, 0, ShapeWidth, ShapeHeight);
			graphics.Restore(state);
		}

        protected override void PaintPanel(Graphics g)
        {
            if (g == null) throw new ArgumentNullException("g");
            var scroll = Hexgrid.ScrollPosition;
            if (DesignMode) { g.FillRectangle(Brushes.Gray, ClientRectangle); return; }

            g.Clear(Color.Black);

            if (IsTransposed) { g.Transform = TransposeMatrix; }
            g.TranslateTransform(scroll.X, scroll.Y);
            g.ScaleTransform(MapScale, MapScale);

            var state = g.Save();
            g.DrawImageUnscaled(MapBuffer, Point.Empty);

            g.Restore(state); state = g.Save();
            Host.PaintUnits(g);

            g.Restore(state); state = g.Save();
            Host.PaintHighlight(g);
        }

		public override void Draw(Graphics graphics)
		{
			if (graphics == null) return;
			GraphicsState state = graphics.Save();
			graphics.TranslateTransform(17.0f, 0.0f);
			graphics.ScaleTransform(-1.0f, 1.0f);
			MethodShape.DrawBrick(graphics, brickBrush1, brickBrush2, brickBrush3);
			graphics.Restore(state);
			graphics.FillRectangle(Brushes.Gray, 1.0f, 4.5f, 3.5f, 0.5f);
			graphics.FillRectangle(Brushes.Gray, 0.0f, 6.5f, 3.5f, 0.5f);
			graphics.FillRectangle(Brushes.Gray, 2.0f, 8.5f, 3.5f, 0.5f);
		}

		internal override void draw(Graphics g)
		{
			RectangleF rcNode = item.getRotatedBounds();
			Rectangle rcDev = Utilities.docToDevice(g, getIconRect(rcNode));

			if (rcDev.Width < 6 || rcDev.Height < 6) return;
GraphicsState state = g.Save();
item.flowChart.unsetTransforms(g);
			if ((item as Node).Expanded)
				g.DrawIcon(imgExpanded, rcDev.X, rcDev.Y);
			else
				g.DrawIcon(imgCollapsed, rcDev.X, rcDev.Y);
g.Restore(state);
		}

        private void DrawElement(Graphics g, Act2DMapLayoutObject.Element e)
        {
            var bitmap = file.CreateBitmapForResource(e.resourceID);
            if (bitmap == null) return;

            var saved = g.Save();
            g.TranslateTransform(e.x, e.y);
            g.TranslateTransform(bitmap.Width * 0.5f, bitmap.Height * 0.5f);
            g.RotateTransform(e.rotate);
            g.ScaleTransform(e.scale_x, e.scale_y);
            g.TranslateTransform(-bitmap.Width * 0.5f, -bitmap.Height * 0.5f);
            g.DrawImage(bitmap, new PointF(0.0f, 0.0f));
            g.Restore(saved);
        }

        private void ResponseValidateCode(string p_Code)
        {
            g_BitMap = new Bitmap(60, 20, PixelFormat.Format32bppArgb);
            g_Graphics = Graphics.FromImage(g_BitMap);
            g_Graphics.FillRectangle(new LinearGradientBrush(new Point(0, 0), new Point(110, 20), Color.FromArgb(240, 255, 255, 255), Color.FromArgb(240, 255, 255, 255)), 0, 0, 200, 200);
            g_Graphics.DrawString(p_Code, new Font("arial", 11), new SolidBrush(Color.Red), new PointF(6, 0));
            g_Graphics.Save();

            MemoryStream o_MemoryStream = new MemoryStream();
            g_BitMap.Save(o_MemoryStream, System.Drawing.Imaging.ImageFormat.Jpeg);
            Response.ClearContent();
            Response.Clear();
            Response.BinaryWrite(o_MemoryStream.ToArray());
            Response.End();
        }

        protected override void DrawToolTip(Graphics g, GMapMarker m, int x, int y)
        {
            GraphicsState s = g.Save();
            g.SmoothingMode = SmoothingMode.AntiAlias;

            System.Drawing.Size st = g.MeasureString(m.ToolTipText, TooltipFont).ToSize();
            System.Drawing.Rectangle rect = new System.Drawing.Rectangle(x, y, st.Width + Control.TooltipTextPadding.Width, st.Height + Control.TooltipTextPadding.Height);
            rect.Offset(m.ToolTipOffset.X, m.ToolTipOffset.Y);

            g.DrawLine(TooltipPen, x, y, rect.X + rect.Width / 2, rect.Y + rect.Height / 2);
            g.FillRectangle(TooltipBackground, rect);
            g.DrawRectangle(TooltipPen, rect);
            g.DrawString(m.ToolTipText, TooltipFont, Brushes.Navy, rect, TooltipFormat);

            g.Restore(s);
        }