public void Read(string fontFileName, char character, string expectedImageFilePath) { Typeface typeFace; using (var fs = Utility.ReadFile(Utility.FontDir + fontFileName)) { var reader = new OpenFontReader(); typeFace = reader.Read(fs); } Typography.OpenFont.Glyph glyph = typeFace.Lookup(character); // read polygons and bezier segments GlyphLoader.Read(glyph, out var polygons, out var bezierSegments); Rect aabb = new Rect(polygons[0][0], polygons[0][1]); //print to test output //calcualte the aabb for (int i = 0; i < polygons.Count; i++) { o.WriteLine("Polygon " + i); var polygon = polygons[i]; foreach (var p in polygon) { aabb.Union(p); o.WriteLine("{0}, {1}", (int)p.X, (int)p.Y); } o.WriteLine(""); } foreach (var segment in bezierSegments) { aabb.Union(segment.Item1); aabb.Union(segment.Item2); aabb.Union(segment.Item3); o.WriteLine("<{0}, {1}> <{2}, {3}> <{4}, {5}>", (int)segment.Item1.X, (int)segment.Item1.Y, (int)segment.Item2.X, (int)segment.Item2.Y, (int)segment.Item3.X, (int)segment.Item3.Y); } o.WriteLine(""); // draw to an image using (Cairo.ImageSurface surface = new Cairo.ImageSurface(Cairo.Format.Argb32, MathEx.RoundToInt(aabb.Width), MathEx.RoundToInt(aabb.Height))) using (Cairo.Context g = new Cairo.Context(surface)) { g.Translate(-aabb.Min.X, -aabb.Min.Y); //essential: set surface back ground to white (1,1,1,1) g.SetSourceColor(CairoEx.ColorWhite); g.Paint(); for (var i = 0; i < polygons.Count; i++) { var polygon = polygons[i]; g.MoveTo(polygon[0].X, polygon[0].Y); foreach (var point in polygon) { g.LineTo(point.X, point.Y); } g.ClosePath(); } g.SetSourceColor(new Cairo.Color(0, 0, 0)); g.LineWidth = 4; g.StrokePreserve(); g.SetSourceColor(new Cairo.Color(0.8, 0, 0, 0.6)); g.Fill(); foreach (var segment in bezierSegments) { var p0 = segment.Item1; var c = segment.Item2; var p1 = segment.Item3; g.MoveTo(p0.X, p0.Y); g.QuadraticTo(c.X, c.Y, p1.X, p1.Y); } g.LineWidth = 4; g.SetSourceColor(CairoEx.ColorRgb(0, 122, 204)); g.Stroke(); //used to generate expected image //surface.WriteToPng($"{Util.OutputPath}\\GlyphReaderFacts.TheReadMethod.Read_{fontFileName}_{character}.png"); var image = Image.LoadPixelData <Bgra32>(Configuration.Default, surface.Data, surface.Width, surface.Height); var expectedImage = Image.Load(expectedImageFilePath); Assert.True(Util.CompareImage(expectedImage, image)); } }
public void ShowGlyphAsDirectedContours_Cairo() { //load the glyph Typeface typeFace; using (var fs = Utility.ReadFile(Utility.FontDir + fontFileName)) { var reader = new OpenFontReader(); typeFace = reader.Read(fs); } Glyph glyph = typeFace.Lookup(character); Bounds boundingBox = typeFace.Bounds; short ascender = typeFace.Ascender; //read polygons and quadratic bezier segments GlyphLoader.Read(glyph, out var polygons, out var quadraticBezierSegments); //The actual position of points should apply ascender offset var offset = new Vector(0, ascender); // draw to an image using (Cairo.ImageSurface surface = new Cairo.ImageSurface(Cairo.Format.Argb32, boundingBox.XMax - boundingBox.XMin, boundingBox.YMax - boundingBox.YMin)) using (Cairo.Context g = new Cairo.Context(surface)) { //set surface back ground to white (1,1,1,1) g.SetSourceColor(CairoEx.ColorWhite); g.Paint(); //polygons for (var i = 0; i < polygons.Count; i++) { var polygon = polygons[i]; var startPoint = polygon[0] + offset; g.MoveTo(startPoint.X, startPoint.Y); var previousPoint = startPoint; foreach (var point in polygon) { var p = point + offset; g.LineTo(p.X, p.Y); g.DrawArrow(previousPoint, p); previousPoint = p; } g.LineTo(startPoint.X, startPoint.Y); g.DrawArrow(previousPoint, startPoint); } g.LineWidth = polygonLineWidth; g.SetSourceColor(polygonColor.ToCairoColor()); g.Stroke(); //quadratic bezier segments foreach (var segment in quadraticBezierSegments) { var p0 = segment.Item1 + offset; var c = segment.Item2 + offset; var p1 = segment.Item3 + offset; g.MoveTo(p0.X, p0.Y); g.QuadraticTo(c.X, c.Y, p1.X, p1.Y); } g.LineWidth = quadraticLineWidth; g.SetSourceColor(quadraticSegmentColor.ToCairoColor()); g.Stroke(); //start points g.SetSourceColor(startPointColor.ToCairoColor()); for (var i = 0; i < polygons.Count; i++) { var polygon = polygons[i]; var startPoint = polygon[0] + offset; g.Arc(startPoint.x, startPoint.y, 10, 0, System.Math.PI * 2); g.Fill(); } //show the image of contours var path = $"{OutputDir}{Path.DirectorySeparatorChar}{fontFileName}_{character}.png"; surface.WriteToPng(path); Util.OpenImage(path); } }
public void Read(string fontFileName, char character, int fontSize) { Typeface typeFace; using (var fs = Utility.ReadFile(Utility.FontDir + fontFileName)) { var reader = new OpenFontReader(); typeFace = reader.Read(fs); } Glyph glyph = typeFace.Lookup(character); // read polygons and bezier segments GlyphLoader.Read(glyph, out var polygons, out var bezierSegments); Rect aabb = new Rect(polygons[0][0], polygons[0][1]); //print to test output //calcualte the aabb for (int i = 0; i < polygons.Count; i++) { o.WriteLine("Polygon " + i); var polygon = polygons[i]; foreach (var p in polygon) { aabb.Union(p); o.WriteLine("{0}, {1}", (int)p.X, (int)p.Y); } o.WriteLine(""); } foreach (var segment in bezierSegments) { aabb.Union(segment.Item1); aabb.Union(segment.Item2); aabb.Union(segment.Item3); o.WriteLine("<{0}, {1}> <{2}, {3}> <{4}, {5}>", (int)segment.Item1.X, (int)segment.Item1.Y, (int)segment.Item2.X, (int)segment.Item2.Y, (int)segment.Item3.X, (int)segment.Item3.Y); } o.WriteLine(""); // draw to an image using (Cairo.ImageSurface surface = new Cairo.ImageSurface(Cairo.Format.Argb32, 2000, 2000)) using (Cairo.Context g = new Cairo.Context(surface)) { g.Translate(-aabb.Min.X, -aabb.Min.Y); for (var i = 0; i < polygons.Count; i++) { var polygon = polygons[i]; g.MoveTo(polygon[0].X, polygon[0].Y); foreach (var point in polygon) { g.LineTo(point.X, point.Y); } g.ClosePath(); } g.SetSourceColor(new Cairo.Color(0, 0, 0)); g.LineWidth = 2; g.StrokePreserve(); g.SetSourceColor(new Cairo.Color(0.8, 0, 0, 0.6)); g.Fill(); foreach (var segment in bezierSegments) { var p0 = segment.Item1; var c = segment.Item2; var p1 = segment.Item3; g.MoveTo(p0.X, p0.Y); g.QuadraticTo(c.X, c.Y, p1.X, p1.Y); } g.LineWidth = 4; g.SetSourceColor(CairoEx.ColorRgb(0, 122, 204)); g.Stroke(); var path = $"{OutputPath}\\GlyphReaderFacts.TheReadMethod.Read_{fontFileName}_{character}_{fontSize}.png"; surface.WriteToPng(path); Util.OpenImage(path); // Now inspect the image to check whether the glyph is correct // TODO Are there a better way to do such kind of unit-test? } }
public void Read(string fontFileName, char character, int fontSize) { Typeface typeFace; using (var fs = Utility.ReadFile(Utility.FontDir + fontFileName)) { var reader = new OpenFontReader(); typeFace = reader.Read(fs); } Glyph glyph = typeFace.Lookup(character); // read polygons and bezier segments var polygons = new List <List <Point> >(); var bezierSegments = new List <(Point, Point, Point)>(); GlyphLoader.Read(glyph, out polygons, out bezierSegments); //print to test output for (int i = 0; i < polygons.Count; i++) { o.WriteLine("Polygon " + i); var polygon = polygons[i]; foreach (var p in polygon) { o.WriteLine("{0}, {1}", (int)p.X, (int)p.Y); } o.WriteLine(""); } foreach (var segment in bezierSegments) { o.WriteLine("<{0}, {1}> <{2}, {3}> <{4}, {5}>", (int)segment.Item1.X, (int)segment.Item1.Y, (int)segment.Item2.X, (int)segment.Item2.Y, (int)segment.Item3.X, (int)segment.Item3.Y); } o.WriteLine(""); //FIXME move/scale the rendered glyph to visible region of the cairo surface. // draw to an image using (Cairo.ImageSurface surface = new Cairo.ImageSurface(Cairo.Format.Argb32, 2000, 2000)) using (Cairo.Context g = new Cairo.Context(surface)) { for (int i = 0; i < polygons.Count; i++) { var polygon = polygons[i]; g.MoveTo(polygon[0].X, polygon[0].Y); foreach (var point in polygon) { g.LineTo(point.X, point.Y); } g.ClosePath(); } g.SetSourceColor(new Cairo.Color(0, 0, 0)); g.LineWidth = 2; g.StrokePreserve(); g.SetSourceColor(new Cairo.Color(0.8, 0, 0)); g.Fill(); foreach (var segment in bezierSegments) { var p0 = segment.Item1; var c = segment.Item2; var p1 = segment.Item3; g.MoveTo(p0.X, p0.Y); g.QuadraticTo(c.X, c.Y, p1.X, p1.Y); } g.SetSourceColor(new Cairo.Color(0.5, 0.5, 0)); g.Stroke(); var path = string.Format("D:\\ImGui.UnitTest\\GlyphReaderFacts.TheReadMethod.Read_{0}_{1}_{2}.png", fontFileName, character, fontSize); surface.WriteToPng(path); Util.OpenImage(path); // Now inspect the image to check whether the glyph is correct // TODO Are there a better way to do such kind of unit-test? } }