//// 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.Imaging;using GrapeCity.Documents.Svg;
namespace DsImagingWeb.Demos{    // This sample shows how to measure and scale the actual content of an SVG image.    // It uses a sample SVG with intrinsic size larger than the actual content,    // and content that is offset within the viewport.    //    // The same SVG is used to illustrate the difference between various SVG sizes in RenderSvgContent sample.    //    // The SVG art used in this sample is from freesvg.org.    public class ScaleSvg    {        public GcBitmap GenerateImage(Size pixelSize, float dpi, bool opaque, string[] sampleParams = null)        {            var svgPath = Path.Combine("Resources", "SvgMisc", "Smiling-Girl-offset.svg");            using var svg = GcSvgDocument.FromFile(svgPath);
            // Create the bitmap:            var bmp = new GcBitmap(pixelSize.Width, pixelSize.Height, opaque, dpi, dpi);            using var g = bmp.CreateGraphics(Color.White);
            // Get the actual SVG image content bounds:            var contentRc = g.MeasureSvg(svg, PointF.Empty);            // Make sure the SVG content fits height-wise twice:            var q = pixelSize.Height / (contentRc.Height * 2.1f);            contentRc.X *= q;            contentRc.Y *= q;            contentRc.Width *= q;            contentRc.Height *= q;
            // Align the actual SVG content to point (0,0):            var s = svg.GetIntrinsicSize(SvgLengthUnits.Pixels);            s.Width *= q;            s.Height *= q;            // This rectangle (in pixels) is similar to the SVG view port.            // It is also scaled so that the SVG content fits twice heightwise,            // and the actual SVG content's top left corner is at the top left corner            // of the rectangle:            var rc = new RectangleF(-contentRc.X, -contentRc.Y, s.Width, s.Height);
            // Set up padding:            const float pad = 12;            rc.Offset(pad, pad);
            // Scale down, limit number of iterations for sanity:            const float qDown = 0.8f;            var currRc = rc;            var currContentRc = contentRc;            while (currRc.X + currContentRc.Right < pixelSize.Width && currContentRc.Height > 8)            {                g.DrawSvg(svg, currRc);                // Draw content bounds if debugging:                // var trc = currContentRc;                // trc.Offset(currRc.Location);                // g.DrawRectangle(trc, Color.MediumPurple);                // Scale SVG content down:                currRc.Height *= qDown;                currRc.Width *= qDown;                currRc.Y -= (currContentRc.Top * qDown - currContentRc.Top);                currRc.X += currContentRc.Width + currContentRc.Left - currContentRc.Left * qDown;                currContentRc.X *= qDown;                currContentRc.Y *= qDown;                currContentRc.Width *= qDown;                currContentRc.Height *= qDown;            }            // Scale up:            const float qUp = 1.2f;            currRc = rc;            currContentRc = contentRc;            currRc.Offset(0, pixelSize.Height - contentRc.Height - pad * 2);            while (currRc.X + currContentRc.Right < pixelSize.Width)            {                g.DrawSvg(svg, currRc);                // Draw content bounds if debugging:                // var trc = currContentRc;                // trc.Offset(currRc.Location);                // g.DrawRectangle(trc, Color.MediumPurple);                // Scale SVG content up:                currRc.Height *= qUp;                currRc.Width *= qUp;                currRc.Y -= (currContentRc.Bottom * qUp - currContentRc.Bottom);                currRc.X += currContentRc.Width + currContentRc.Left - currContentRc.Left * qUp;                currContentRc.X *= qUp;                currContentRc.Y *= qUp;                currContentRc.Width *= qUp;                currContentRc.Height *= qUp;            }            // Done:            return bmp;        }    }}