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Improve OxyPlot.SvgRenderContext text rendering (oxyplot#1531)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,189 @@ | ||
| // -------------------------------------------------------------------------------------------------------------------- | ||
| // <copyright file="SvgExporterTests.cs" company="OxyPlot"> | ||
| // Copyright (c) 2020 OxyPlot contributors | ||
| // </copyright> | ||
| // -------------------------------------------------------------------------------------------------------------------- | ||
|
|
||
| namespace OxyPlot.ImageSharp.Tests | ||
| { | ||
| using System; | ||
| using System.IO; | ||
| using NUnit.Framework; | ||
|
|
||
| using OxyPlot.Series; | ||
| using OxyPlot.ImageSharp; | ||
| using OxyPlot.Annotations; | ||
|
|
||
| [TestFixture] | ||
| public class SvgExporterTests | ||
| { | ||
| private const string SVG_FOLDER = "SVG"; | ||
| private string outputDirectory; | ||
|
|
||
| [OneTimeSetUp] | ||
| public void Setup() | ||
| { | ||
| this.outputDirectory = Path.Combine(TestContext.CurrentContext.WorkDirectory, SVG_FOLDER); | ||
| Directory.CreateDirectory(this.outputDirectory); | ||
| } | ||
|
|
||
| [Test] | ||
| public void Export_SomeExamplesInExampleLibrary_CheckThatAllFilesExist() | ||
| { | ||
| var exporter = new SvgExporter(1000, 750); | ||
| var directory = Path.Combine(this.outputDirectory, "ExampleLibrary"); | ||
| ExportTest.Export_FirstExampleOfEachExampleGroup_CheckThatAllFilesExist(exporter, directory, ".svg"); | ||
| } | ||
|
|
||
| [Test] | ||
| public void ExportToStream() | ||
| { | ||
| var plotModel = CreateTestModel1(); | ||
| var exporter = new SvgExporter(1000, 750); | ||
| var stream = new MemoryStream(); | ||
| exporter.Export(plotModel, stream); | ||
|
|
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| Assert.IsTrue(stream.Length > 0); | ||
| } | ||
|
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||
| [Test] | ||
| public void ExportToFile() | ||
| { | ||
| var plotModel = CreateTestModel1(); | ||
| var fileName = Path.Combine(this.outputDirectory, "Plot1.svg"); | ||
| SvgExporter.Export(plotModel, fileName, 1000, 750); | ||
|
|
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| Assert.IsTrue(File.Exists(fileName)); | ||
| } | ||
|
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| [Test] | ||
| public void ExportWithDifferentBackground() | ||
| { | ||
| var plotModel = CreateTestModel1(); | ||
| plotModel.Background = OxyColors.Yellow; | ||
| var fileName = Path.Combine(this.outputDirectory, "Background_Yellow.svg"); | ||
| var exporter = new SvgExporter(1000, 750); | ||
| using (var stream = File.OpenWrite(fileName)) | ||
| { | ||
| exporter.Export(plotModel, stream); | ||
| } | ||
|
|
||
| Assert.IsTrue(File.Exists(fileName)); | ||
| } | ||
|
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||
| [Test] | ||
| [TestCase(0.75)] | ||
| [TestCase(1)] | ||
| [TestCase(1.2)] | ||
| [TestCase(2)] | ||
| [TestCase(3.1415)] | ||
| public void ExportWithResolution(double factor) | ||
| { | ||
| var resolution = (int)(96 * factor); | ||
| var plotModel = CreateTestModel1(); | ||
| var directory = Path.Combine(this.outputDirectory, "Resolution"); | ||
| Directory.CreateDirectory(directory); | ||
|
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| var fileName = Path.Combine(directory, $"Resolution{resolution}.svg"); | ||
| var exporter = new SvgExporter((int)(400 * factor), (int)(300 * factor), resolution); | ||
|
|
||
| using (var stream = File.OpenWrite(fileName)) | ||
| { | ||
| exporter.Export(plotModel, stream); | ||
| } | ||
|
|
||
| Assert.IsTrue(File.Exists(fileName)); | ||
| } | ||
|
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| [Test] | ||
| [TestCase(true)] | ||
| [TestCase(false)] | ||
| public void PlotBackgroundImageTest(bool interpolate) | ||
| { | ||
| // this is a test of the DrawImage function; don't add pointless backgrounds to your plots | ||
|
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| var plotModel = CreateTestModel1(); | ||
|
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| var pixelData = new OxyColor[5, 5]; | ||
| for (int i = 0; i < pixelData.GetLength(0); i++) | ||
| { | ||
| for (int j = 0; j < pixelData.GetLength(1); j++) | ||
| { | ||
| pixelData[i, j] = OxyColor.FromArgb(255, 128, (byte)((i * 255) / pixelData.GetLength(0)), (byte)((j * 255) / pixelData.GetLength(1))); | ||
| } | ||
| } | ||
|
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| var oxyImage = OxyImage.Create(pixelData, ImageFormat.Png); | ||
| var imageAnnotation = new ImageAnnotation() | ||
| { | ||
| ImageSource = oxyImage, | ||
| X = new PlotLength(-0.0, PlotLengthUnit.RelativeToPlotArea), | ||
| Y = new PlotLength(-0.0, PlotLengthUnit.RelativeToPlotArea), | ||
| Width = new PlotLength(1.0, PlotLengthUnit.RelativeToPlotArea), | ||
| Height = new PlotLength(1.0, PlotLengthUnit.RelativeToPlotArea), | ||
| HorizontalAlignment = HorizontalAlignment.Left, | ||
| VerticalAlignment = VerticalAlignment.Top, | ||
| Interpolate = interpolate | ||
| }; | ||
| plotModel.Annotations.Add(imageAnnotation); | ||
|
|
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| var fileName = Path.Combine(this.outputDirectory, $"PlotBackground{(interpolate ? "Interpolated" : "Pixelated")}.svg"); | ||
| var exporter = new SvgExporter(1000, 750); | ||
| using (var stream = File.OpenWrite(fileName)) | ||
| { | ||
| exporter.Export(plotModel, stream); | ||
| } | ||
|
|
||
| Assert.IsTrue(File.Exists(fileName)); | ||
| } | ||
|
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| [Test] | ||
| [TestCase(true)] | ||
| [TestCase(false)] | ||
| public void LargeImageTest(bool interpolate) | ||
| { | ||
| // this is a test of the DrawImage function; don't add pointless backgrounds to your plots | ||
|
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| var plotModel = CreateTestModel1(); | ||
|
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||
| var pixelData = new OxyColor[5, 5]; | ||
| for (int i = 0; i < pixelData.GetLength(0); i++) | ||
| { | ||
| for (int j = 0; j < pixelData.GetLength(1); j++) | ||
| { | ||
| pixelData[i, j] = OxyColor.FromArgb(255, 128, (byte)((i * 255) / pixelData.GetLength(0)), (byte)((j * 255) / pixelData.GetLength(1))); | ||
| } | ||
| } | ||
|
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| var oxyImage = OxyImage.Create(pixelData, ImageFormat.Png); | ||
| var imageAnnotation = new ImageAnnotation() | ||
| { | ||
| ImageSource = oxyImage, | ||
| X = new PlotLength(-1, PlotLengthUnit.RelativeToViewport), | ||
| Y = new PlotLength(-1, PlotLengthUnit.RelativeToViewport), | ||
| Width = new PlotLength(3, PlotLengthUnit.RelativeToViewport), | ||
| Height = new PlotLength(3, PlotLengthUnit.RelativeToViewport), | ||
| HorizontalAlignment = HorizontalAlignment.Left, | ||
| VerticalAlignment = VerticalAlignment.Top, | ||
| Interpolate = interpolate | ||
| }; | ||
| plotModel.Annotations.Add(imageAnnotation); | ||
|
|
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| var fileName = Path.Combine(this.outputDirectory, $"LargeImage{(interpolate ? "Interpolated" : "Pixelated")}.svg"); | ||
| var exporter = new SvgExporter(1000, 750); | ||
| using (var stream = File.OpenWrite(fileName)) | ||
| { | ||
| exporter.Export(plotModel, stream); | ||
| } | ||
|
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| Assert.IsTrue(File.Exists(fileName)); | ||
| } | ||
|
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| private static PlotModel CreateTestModel1() | ||
| { | ||
| var model = new PlotModel { Title = "Test 1" }; | ||
| model.Series.Add(new FunctionSeries(Math.Sin, 0, Math.PI * 8, 200, "sin(x)")); | ||
| return model; | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,61 @@ | ||
| // -------------------------------------------------------------------------------------------------------------------- | ||
| // <copyright file="SvgExporter.cs" company="OxyPlot"> | ||
| // Copyright (c) 2014 OxyPlot contributors | ||
| // </copyright> | ||
| // <summary> | ||
| // Provides functionality to export plots to scalable vector graphics using <see cref="Graphics" /> for text measuring. | ||
| // </summary> | ||
| // -------------------------------------------------------------------------------------------------------------------- | ||
|
|
||
| namespace OxyPlot.ImageSharp | ||
| { | ||
| using System; | ||
| using System.IO; | ||
|
|
||
| /// <summary> | ||
| /// Provides functionality to export plots to scalable vector graphics using ImageSharp for text measuring. | ||
| /// </summary> | ||
| public class SvgExporter : OxyPlot.SvgExporter, IDisposable | ||
| { | ||
| /// <summary> | ||
| /// The render context. | ||
| /// </summary> | ||
| private ImageRenderContext irc; | ||
|
|
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| /// <summary> | ||
| /// Initializes a new instance of the <see cref="SvgExporter" /> class. | ||
| /// </summary> | ||
| public SvgExporter(double width, double height, double resolution = 96) | ||
| { | ||
| this.Width = width; | ||
| this.Height = height; | ||
| this.irc = new ImageRenderContext(1, 1, OxyColors.Undefined, resolution); | ||
| this.TextMeasurer = irc; | ||
| } | ||
|
|
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| /// <summary> | ||
| /// Exports the specified <see cref="PlotModel" /> to the specified file. | ||
| /// </summary> | ||
| /// <param name="model">The model.</param> | ||
| /// <param name="fileName">The file name.</param> | ||
| /// <param name="width">The width.</param> | ||
| /// <param name="height">The height.</param> | ||
| /// <param name="resolution">The resolution in dpi (defaults to 96dpi).</param> | ||
| public static void Export(IPlotModel model, string fileName, int width, int height, double resolution = 96) | ||
| { | ||
| var exporter = new SvgExporter(width, height, resolution); | ||
| using (var stream = File.Create(fileName)) | ||
| { | ||
| exporter.Export(model, stream); | ||
| } | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources. | ||
| /// </summary> | ||
| public void Dispose() | ||
| { | ||
| this.irc.Dispose(); | ||
| } | ||
| } | ||
| } |
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