//// This code is part of Document Solutions for Imaging demos.// Copyright (c) MESCIUS inc. All rights reserved.//using System.IO;using System.Drawing;using GrapeCity.Documents.Drawing;using GrapeCity.Documents.Text;using GrapeCity.Documents.Imaging;using GCTEXT = GrapeCity.Documents.Text;using GCDRAW = GrapeCity.Documents.Drawing;
namespace DsImagingWeb.Demos{    // This sample demonstrates how to use GcGraphics.PushClip/PopClip    // methods to clip drawing operations to an arbitrary region.    public class PushClip    {        public GcBitmap GenerateImage(Size pixelSize, float dpi, bool opaque, string[] sampleParams = null)        {            var backColor = Color.LightGray;            var foreColor = Color.DarkRed;            float cw = 400, ch = 300, pad = 40, bord = 4, textpad = 10;            var clipRc = new RectangleF(pad, pixelSize.Height - ch - pad, cw, ch);            var bmp = new GcBitmap(pixelSize.Width, pixelSize.Height, opaque, dpi, dpi);            using (var g = bmp.CreateGraphics(backColor))            {                // We create a path consisting of two nested rectangles,                // outer for the whole bitmap, inner for a text box.                // We then use that path to create a clip region and                // draw an image covering the whole bitmap but excluding                // the text box:                using (var gpath = g.CreatePath())                {                    gpath.BeginFigure(PointF.Empty);                    gpath.AddLine(new PointF(pixelSize.Width, 0));                    gpath.AddLine(new PointF(pixelSize.Width, pixelSize.Height));                    gpath.AddLine(new PointF(0, pixelSize.Height));                    gpath.EndFigure(FigureEnd.Closed);                    gpath.BeginFigure(new PointF(clipRc.Left, clipRc.Top));                    gpath.AddLine(new PointF(clipRc.Right, clipRc.Top));                    gpath.AddLine(new PointF(clipRc.Right, clipRc.Bottom));                    gpath.AddLine(new PointF(clipRc.Left, clipRc.Bottom));                    gpath.EndFigure(FigureEnd.Closed);                    using (var cliprgn = g.CreateClipRegion(gpath))                    using (var img = GCDRAW.Image.FromFile(Path.Combine("Resources", "ImagesBis", "clivia.jpg")))                    {                        g.PushClip(cliprgn);                        g.DrawImage(                            img,                            new RectangleF(0, 0, pixelSize.Width, pixelSize.Height),                            null,                            ImageAlign.StretchImage);                        g.PopClip(cliprgn);                    }                }                // We now draw some text inside the text box,                // clipping to it (this overload of PushClip                // returns an IDisposable that removes the clipping                // when disposed):                using (g.PushClip(clipRc))                {                    clipRc.Inflate(-textpad, -textpad);                    g.DrawString(                        Common.Util.LoremIpsum(1, 3, 4, 10, 20),                        new TextFormat()                        {                            Font = GCTEXT.Font.FromFile(Path.Combine("Resources", "Fonts", "FreeSerif.ttf")),                            FontSize = 16,                            ForeColor = foreColor                        },                        clipRc                        );                }                // Draw a border around the whole image,                // demonstrating that the clip has been removed:                g.DrawRectangle(                    new RectangleF(bord / 2, bord / 2, pixelSize.Width - bord, pixelSize.Height - bord),                    new GCDRAW.Pen(foreColor, bord));            }            return bmp;        }    }}