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?
}
}
