RenderSvgContent.cs
C# VB
//// 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 render the actual SVG content // that sometimes is offset within the SVG viewport. // In the left part of the page, we render such an SVG as it is supposed // to be laid out within its viewport. A gray border is drawn around the viewport, // and a magenta border is around the SVG content. // In the right part of the page we locate just the content at a specific point // in the final image, and draw a purple border around it. // // This short sample shows how to measure and render an SVG image. // The SVG art used in this sample is from freesvg.org. public class RenderSvgContent { public GcBitmap GenerateImage(Size pixelSize, float dpi, bool opaque, string[] sampleParams = null) { // Load the SVG: var svgPath = Path.Combine("Resources", "SvgMisc", "Smiling-Girl-offset.svg"); using var svg = GcSvgDocument.FromFile(svgPath);
var bmp = new GcBitmap(pixelSize.Width, pixelSize.Height, opaque, dpi, dpi); using var g = bmp.CreateGraphics(Color.White); var pt0 = new PointF(g.Resolution, g.Resolution);
// Render the SVG content as specified by the SVG layout within viewport: var rcViewport = new RectangleF(pt0, svg.GetIntrinsicSize(SvgLengthUnits.Pixels)); // Measure the content size/location relative to 'pt': var rcContent0 = g.MeasureSvg(svg, pt0); // Draw the SVG and viewport and content bounds: g.DrawSvg(svg, pt0); g.DrawRectangle(rcViewport, Color.DarkGray); g.DrawRectangle(rcContent0, Color.Magenta);
// In the left part of the bitmap, render just the SVG content // aligning its top left corner to a specific point on the bitmap // (center of page horizontally, 1" from the top): var pt1 = new PointF(pixelSize.Width / 2, g.Resolution); // An alternative to GcGraphics.MeasureSvg() is GcSvgDocument.Measure(), // here we use it for illustration but these methods are calculations heavy, // so in a real app we would re-use the results from GcGraphics.MeasureSvg() above: var rcContent1 = svg.Measure(PointF.Empty, dpi); g.DrawSvg(svg, new PointF(pt1.X - rcContent1.X, pt1.Y - rcContent1.Y)); // Add a border: g.DrawRectangle(new RectangleF(pt1, rcContent1.Size), Color.Purple);
// Done: return bmp; } }}