public static CanvasGeometry CreateGeometry(
float size,
FontVariant selectedVariant,
Character selectedChar,
CanvasTextLayoutAnalysis analysis,
CanvasTypography typography)
{
CanvasDevice device = Utils.CanvasDevice;
/* SVG Exports render at fixed size - but a) they're vectors, and b) they're
* inside an auto-scaling viewport. So render-size is *largely* pointless */
float canvasH = size, canvasW = size, fontSize = size;
using (CanvasTextLayout layout = new CanvasTextLayout(device, $"{selectedChar.Char}", new CanvasTextFormat
{
FontSize = fontSize,
FontFamily = selectedVariant.Source,
FontStretch = selectedVariant.FontFace.Stretch,
FontWeight = selectedVariant.FontFace.Weight,
FontStyle = selectedVariant.FontFace.Style,
HorizontalAlignment = CanvasHorizontalAlignment.Center
}, canvasW, canvasH))
{
layout.SetTypography(0, 1, typography);
layout.Options = analysis.GlyphFormats.Contains(GlyphImageFormat.Svg) ? CanvasDrawTextOptions.EnableColorFont : CanvasDrawTextOptions.Default;
return(CanvasGeometry.CreateText(layout));
}
}
private static string GetFileName(FontVariant font, ExportNamingScheme scheme)
{
string fileName = null;
string ext = ".ttf";
var src = DirectWrite.GetFileName(font.FontFace);
if (!string.IsNullOrWhiteSpace(src))
{
var strsrc = Path.GetExtension(src);
if (!string.IsNullOrWhiteSpace(strsrc))
{
ext = strsrc;
}
}
if (string.IsNullOrEmpty(ext))
{
if (scheme == ExportNamingScheme.System)
{
fileName = src;
}
}
if (string.IsNullOrWhiteSpace(fileName))
{
fileName = $"{font.FamilyName.Trim()} {font.PreferredName.Trim()}{ext}";
}
return($"{Utils.Humanise(Path.GetFileNameWithoutExtension(fileName), false)}{Path.GetExtension(fileName).ToLower()}");
}
public static string GetCharString(FontVariant variant)
{
StringBuilder sb = new StringBuilder();
sb.AppendJoin(string.Empty, variant.GetCharacters().Select(c => c.Char));
return(sb.ToString());
}
/// <summary>
/// Returns a list of Typographic Variants for a character supported by the font.
/// </summary>
public static List <TypographyFeatureInfo> GetCharacterVariants(FontVariant font, Models.Character character)
{
var textAnalyzer = new CanvasTextAnalyzer(character.Char, CanvasTextDirection.TopToBottomThenLeftToRight);
KeyValuePair <CanvasCharacterRange, CanvasAnalyzedScript> analyzed = textAnalyzer.GetScript().First();
List <TypographyFeatureInfo> supported = new List <TypographyFeatureInfo>
{
TypographyFeatureInfo.None
};
foreach (var feature in font.XamlTypographyFeatures)
{
if (feature == TypographyFeatureInfo.None)
{
continue;
}
var glyphs = textAnalyzer.GetGlyphs(analyzed.Key, font.FontFace, 24, false, false, analyzed.Value);
bool[] results = font.FontFace.GetTypographicFeatureGlyphSupport(analyzed.Value, feature.Feature, glyphs);
if (results.Any(r => r))
{
supported.Add(feature);
}
}
return(supported);
}
public static (string Path, Rect Bounds) GetGeometry(
float size,
FontVariant selectedVariant,
Character selectedChar,
CanvasTextLayoutAnalysis analysis,
CanvasTypography typography)
{
using (CanvasGeometry geom = CreateGeometry(size, selectedVariant, selectedChar, analysis, typography))
{
/*
* Unfortunately this only constructs a monochrome path, if we want color
* Win2D does not yet expose the necessary API's to get the individual glyph
* layers that make up a color glyph.
*
* We'll need to handle this in C++/CX if we want to do this at some point.
*/
var bounds = geom.ComputeBounds();
var interop = SimpleIoc.Default.GetInstance <Interop>();
var s = interop.GetPathData(geom);
var t = s.Transform.Translation;
bounds = new Rect(t.X - bounds.Left, -bounds.Top + t.Y, bounds.Width, bounds.Height);
return(s.Path, bounds);
}
}
public static async void RequestExportFontFile(FontVariant variant)
{
var scheme = ResourceHelper.AppSettings.ExportNamingScheme;
var interop = Utils.GetInterop();
if (DirectWrite.IsFontLocal(variant.FontFace))
{
string filePath = GetFileName(variant, scheme);
string name = Path.GetFileNameWithoutExtension(filePath);
string ext = Path.GetExtension(filePath);
if (await PickFileAsync(name, Localization.Get("ExportFontFile/Text"), new[] { ext }, PickerLocationId.DocumentsLibrary) is StorageFile file)
{
try
{
bool success = await TryWriteToFileAsync(variant, file);
Messenger.Default.Send(new AppNotificationMessage(true, new ExportFontFileResult(success, file)));
return;
}
catch
{
}
}
}
Messenger.Default.Send(new AppNotificationMessage(true, new ExportFontFileResult(null, false)));
}
public static List <TypographyFeatureInfo> GetSupportedTypographyFeatures(FontVariant variant)
{
var features = DirectWrite.GetSupportedTypography(variant.FontFace).Values.ToList();
var list = features.Select(f => new TypographyFeatureInfo((CanvasTypographyFeatureName)f)).OrderBy(f => f.DisplayName).ToList();
return(list);
}
public static InstalledFont CreateDefault(DWriteFontFace face)
{
var font = new InstalledFont("");
font.FontFace = face.FontFace;
font._variants.Add(FontVariant.CreateDefault(face.FontFace));
return(font);
}
private static string GetFileName(
InstalledFont selectedFont,
FontVariant selectedVariant,
Character selectedChar,
string ext)
{
var chr = GlyphService.GetCharacterDescription(selectedChar.UnicodeIndex, selectedVariant) ?? selectedChar.UnicodeString;
return($"{selectedFont.Name} {selectedVariant.PreferredName} - {chr}.{ext}");
}
/// <summary>
/// Creates a FontAnalysis object for a FontVariant and ensures the custom
/// search map for the font is loaded
/// </summary>
/// <param name="variant"></param>
/// <returns></returns>
public static FontAnalysis Analyze(FontVariant variant)
{
var analysis = new FontAnalysis(variant.FontFace);
if (analysis.HasGlyphNames)
{
PrepareSearchMap(variant, analysis.GlyphNameMappings);
}
return(analysis);
}
private static async Task <bool> TryWriteToFileAsync(FontVariant font, StorageFile file)
{
try
{
using IRandomAccessStream s = await file.OpenAsync(FileAccessMode.ReadWrite);
s.Size = 0;
using IOutputStream o = s.GetOutputStreamAt(0);
await DirectWrite.WriteToStreamAsync(font.FontFace, o);
return(true);
}
catch { }
return(false);
}
/// <summary>
/// Creates a FontAnalysis object for a FontVariant and ensures the custom
/// search map for the font is loaded
/// </summary>
/// <param name="variant"></param>
/// <returns></returns>
public static FontAnalysis Analyze(FontVariant variant)
{
var analysis = new FontAnalysis(variant.FontFace);
if (analysis.GlyphNames != null &&
analysis.GlyphNames.Count > 0)
{
PrepareSearchMap(variant, analysis.GlyphNames.ToList());
}
// TODO : Parse Design & Script Language Tags
// if (!string.IsNullOrWhiteSpace(analysis.DesignLanguages))
// {
// var langs = analysis.DesignLanguages.Split(',');
// }
return(analysis);
}
private static async Task <bool> TryWriteToFileAsync(FontVariant font, StorageFile file)
{
try
{
using IRandomAccessStream s = await file.OpenAsync(FileAccessMode.ReadWrite).AsTask().ConfigureAwait(false);
s.Size = 0;
using IOutputStream o = s.GetOutputStreamAt(0);
await DirectWrite.WriteToStreamAsync(font.FontFace, o).AsTask().ConfigureAwait(false);
await s.FlushAsync(); // using statements force synchronous flushes
return(true);
}
catch { }
return(false);
}
public static async void RequestExportFontFile(FontVariant variant, CanvasTextLayoutAnalysis ana)
{
string name = Path.GetFileNameWithoutExtension(ana.FilePath);
string ext = Path.GetExtension(ana.FilePath);
if (await PickFileAsync(name, Localization.Get("ExportFontFile/Text"), new[] { ext }, PickerLocationId.DocumentsLibrary) is StorageFile file)
{
try
{
var interop = SimpleIoc.Default.GetInstance <Interop>();
bool success = await interop.WriteToFileAsync(variant.FontFace, file);
Messenger.Default.Send(new AppNotificationMessage(true, new ExportFontFileResult(success, file)));
}
catch
{
Messenger.Default.Send(new AppNotificationMessage(true, new ExportFontFileResult(false, file)));
}
}
}
public static List <TypographyFeatureInfo> GetSupportedTypographyFeatures(FontVariant variant)
{
Dictionary <string, TypographyFeatureInfo> features = new Dictionary <string, TypographyFeatureInfo>();
var analyzer = new CanvasTextAnalyzer(variant.GetCharString(), CanvasTextDirection.LeftToRightThenTopToBottom);
{
foreach (var script in analyzer.GetScript())
{
foreach (var feature in variant.FontFace.GetSupportedTypographicFeatureNames(script.Value))
{
var info = new TypographyFeatureInfo(feature);
if (!features.ContainsKey(info.DisplayName))
{
features.Add(info.DisplayName, info);
}
}
}
}
return(features.Values.OrderBy(f => f.DisplayName).ToList());
}
private static void PrepareSearchMap(FontVariant variant, List <GlyphNameMap> names)
{
if (variant.SearchMap == null)
{
var idxs = variant.GetIndexes();
var rng = variant.FontFace.GetGlyphIndices(idxs);
Dictionary <Character, GlyphNameMap> map = new Dictionary <Character, GlyphNameMap>();
var list = variant.GetCharacters();
for (int i = 0; i < list.Count; i++)
{
var c = list[i];
var mapping = names[rng[i]];
mapping.Name = mapping.Name.Replace("-", " ").Replace("_", " ");
map.Add(c, mapping);
}
variant.SearchMap = map;
}
}
private static void PrepareSearchMap(FontVariant variant, IReadOnlyDictionary <int, string> names)
{
if (variant.SearchMap == null)
{
uint[] uni = variant.GetGlyphUnicodeIndexes();
int[] gly = variant.FontFace.GetGlyphIndices(uni);
IReadOnlyList <Character> chars = variant.GetCharacters();
Dictionary <Character, string> map = new Dictionary <Character, string>();
for (int i = 0; i < chars.Count; i++)
{
Character c = chars[i];
if (names.TryGetValue(gly[i], out string mapping) && !string.IsNullOrEmpty(mapping))
{
map.Add(c, mapping);
}
}
variant.SearchMap = map;
}
}
private static string GetFileName(FontVariant font, ExportNamingScheme scheme)
{
string fileName = null;
string ext = ".ttf";
var src = DirectWrite.GetFileName(font.FontFace);
if (!string.IsNullOrWhiteSpace(src))
{
ext = Path.GetExtension(src);
}
if (scheme == ExportNamingScheme.System)
{
fileName = src;
}
if (string.IsNullOrWhiteSpace(fileName))
{
fileName = $"{font.FamilyName} {font.PreferredName}{ext}";
}
return($"{Humanizer.To.SentenceCase.Transform(Path.GetFileNameWithoutExtension(fileName))}{Path.GetExtension(fileName).ToLower()}");
}
public static (string Path, Rect Bounds) GetGeometry(
float size,
FontVariant selectedVariant,
Character selectedChar,
CanvasTextLayoutAnalysis analysis,
CanvasTypography typography)
{
/*
* Note: this only constructs the monochrome version
* of the glyph.
*
* Drop into C++/CX for color / multi-variant glyphs.
*/
using CanvasGeometry geom = CreateGeometry(size, selectedVariant, selectedChar, analysis, typography);
var bounds = geom.ComputeBounds();
var interop = Utils.GetInterop();
var s = interop.GetPathData(geom);
var t = s.Transform.Translation;
bounds = new Rect(t.X - bounds.Left, -bounds.Top + t.Y, bounds.Width, bounds.Height);
return(s.Path, bounds);
}
public static async Task ExportSvgAsync(
ExportStyle style,
InstalledFont selectedFont,
FontVariant selectedVariant,
Character selectedChar,
CanvasTypography typography)
{
try
{
string name = GetFileName(selectedFont, selectedVariant, selectedChar, "svg");
if (await PickFileAsync(name, "SVG", new[] { ".svg" }) is StorageFile file)
{
CachedFileManager.DeferUpdates(file);
var device = Utils.CanvasDevice;
var textColor = style == ExportStyle.Black ? Colors.Black : Colors.White;
/* SVG Exports render at fixed size - but a) they're vectors, and b) they're
* inside an auto-scaling viewport. So rendersize is *largely* pointless */
float canvasH = 1024f, canvasW = 1024f, fontSize = 1024f;
using (CanvasTextLayout layout = new CanvasTextLayout(device, $"{selectedChar.Char}", new CanvasTextFormat
{
FontSize = fontSize,
FontFamily = selectedVariant.Source,
FontStretch = selectedVariant.FontFace.Stretch,
FontWeight = selectedVariant.FontFace.Weight,
FontStyle = selectedVariant.FontFace.Style,
HorizontalAlignment = CanvasHorizontalAlignment.Center
}, canvasW, canvasH))
{
layout.SetTypography(0, 1, typography);
using (CanvasGeometry temp = CanvasGeometry.CreateText(layout))
{
var b = temp.ComputeBounds();
double scale = Math.Min(1, Math.Min(canvasW / b.Width, canvasH / b.Height));
Matrix3x2 transform =
Matrix3x2.CreateTranslation(new Vector2((float)-b.Left, (float)-b.Top))
* Matrix3x2.CreateScale(new Vector2((float)scale));
using (CanvasGeometry geom = temp.Transform(transform))
{
/*
* Unfortunately this only constructs a monochrome path, if we want color
* Win2D does not yet expose the neccessary API's to get the individual glyph
* layers that make up a colour glyph.
*
* We'll need to handle this in C++/CX if we want to do this at some point.
*/
SVGPathReciever rc = new SVGPathReciever();
geom.SendPathTo(rc);
Rect bounds = geom.ComputeBounds();
using (CanvasSvgDocument document = Utils.GenerateSvgDocument(device, bounds.Width, bounds.Height, rc))
{
((CanvasSvgNamedElement)document.Root.FirstChild).SetColorAttribute("fill", textColor);
await Utils.WriteSvgAsync(document, file);
}
}
}
}
await CachedFileManager.CompleteUpdatesAsync(file);
}
}
catch (Exception ex)
{
await SimpleIoc.Default.GetInstance <IDialogService>()
.ShowMessageBox(ex.Message, Localization.Get("SaveImageError"));
}
}
public static async Task <ExportResult> ExportSvgAsync(
ExportStyle style,
InstalledFont selectedFont,
FontVariant selectedVariant,
Character selectedChar,
CanvasTextLayoutAnalysis analysis,
CanvasTypography typography)
{
try
{
string name = GetFileName(selectedFont, selectedVariant, selectedChar, "svg");
if (await PickFileAsync(name, "SVG", new[] { ".svg" }) is StorageFile file)
{
CachedFileManager.DeferUpdates(file);
CanvasDevice device = Utils.CanvasDevice;
Color textColor = style == ExportStyle.Black ? Colors.Black : Colors.White;
// If COLR format (e.g. Segoe UI Emoji), we have special export path.
if (style == ExportStyle.ColorGlyph && analysis.HasColorGlyphs && !analysis.GlyphFormats.Contains(GlyphImageFormat.Svg))
{
NativeInterop interop = Utils.GetInterop();
List <string> paths = new List <string>();
Rect bounds = Rect.Empty;
foreach (var thing in analysis.Indicies)
{
var path = interop.GetPathDatas(selectedVariant.FontFace, thing.ToArray()).First();
paths.Add(path.Path);
if (!path.Bounds.IsEmpty)
{
var left = Math.Min(bounds.Left, path.Bounds.Left);
var top = Math.Min(bounds.Top, path.Bounds.Top);
var right = Math.Max(bounds.Right, path.Bounds.Right);
var bottom = Math.Max(bounds.Bottom, path.Bounds.Bottom);
bounds = new Rect(
left,
top,
right - left,
bottom - top);
}
}
using (CanvasSvgDocument document = Utils.GenerateSvgDocument(device, bounds, paths, analysis.Colors, invertBounds: false))
{
await Utils.WriteSvgAsync(document, file);
}
return(new ExportResult(true, file));
}
var data = GetGeometry(1024, selectedVariant, selectedChar, analysis, typography);
async Task SaveMonochromeAsync()
{
using CanvasSvgDocument document = Utils.GenerateSvgDocument(device, data.Bounds, data.Path, textColor);
await Utils.WriteSvgAsync(document, file);
}
// If the font uses SVG glyphs, we can extract the raw SVG from the font file
if (analysis.GlyphFormats.Contains(GlyphImageFormat.Svg))
{
string str = null;
IBuffer b = GetGlyphBuffer(selectedVariant.FontFace, selectedChar.UnicodeIndex, GlyphImageFormat.Svg);
if (b.Length > 2 && b.GetByte(0) == 31 && b.GetByte(1) == 139)
{
using var stream = b.AsStream();
using var gzip = new GZipStream(stream, CompressionMode.Decompress);
using var reader = new StreamReader(gzip);
str = reader.ReadToEnd();
}
else
{
using var dataReader = DataReader.FromBuffer(b);
dataReader.UnicodeEncoding = Windows.Storage.Streams.UnicodeEncoding.Utf8;
str = dataReader.ReadString(b.Length);
}
if (str.StartsWith("<?xml"))
{
str = str.Remove(0, str.IndexOf(">") + 1);
}
str = str.TrimStart();
try
{
using (CanvasSvgDocument document = CanvasSvgDocument.LoadFromXml(Utils.CanvasDevice, str))
{
// We need to transform the SVG to fit within the default document bounds, as characters
// are based *above* the base origin of (0,0) as (0,0) is the Baseline (bottom left) position for a character,
// so by default a will appear out of bounds of the default SVG viewport (towards top left).
//if (!document.Root.IsAttributeSpecified("viewBox")) // Specified viewbox requires baseline transform?
{
// We'll regroup all the elements inside a "g" / group tag,
// and apply a transform to the "g" tag to try and put in
// in the correct place. There's probably a more accurate way
// to do this by directly setting the root viewBox, if anyone
// can find the correct calculation...
List <ICanvasSvgElement> elements = new List <ICanvasSvgElement>();
double minTop = 0;
double minLeft = double.MaxValue;
double maxWidth = double.MinValue;
double maxHeight = double.MinValue;
void ProcessChildren(CanvasSvgNamedElement root)
{
CanvasSvgNamedElement ele = root.FirstChild as CanvasSvgNamedElement;
while (true)
{
CanvasSvgNamedElement next = root.GetNextSibling(ele) as CanvasSvgNamedElement;
if (ele.Tag == "g")
{
ProcessChildren(ele);
}
else if (ele.Tag == "path")
{
// Create a XAML geometry to try and find the bounds of each character
// Probably more efficient to do in Win2D, but far less code to do with XAML.
Geometry gm = XamlBindingHelper.ConvertValue(typeof(Geometry), ele.GetStringAttribute("d")) as Geometry;
minTop = Math.Min(minTop, gm.Bounds.Top);
minLeft = Math.Min(minLeft, gm.Bounds.Left);
maxWidth = Math.Max(maxWidth, gm.Bounds.Width);
maxHeight = Math.Max(maxHeight, gm.Bounds.Height);
}
ele = next;
if (ele == null)
{
break;
}
}
}
ProcessChildren(document.Root);
double top = minTop < 0 ? minTop : 0;
double left = minLeft;
document.Root.SetRectangleAttribute("viewBox", new Rect(left, top, data.Bounds.Width, data.Bounds.Height));
}
await Utils.WriteSvgAsync(document, file);
}
}
catch
{
// Certain fonts seem to have their SVG glyphs encoded with... I don't even know what encoding.
// for example: https://github.com/adobe-fonts/emojione-color
// In these cases, fallback to monochrome black
await SaveMonochromeAsync();
}
}
else
{
await SaveMonochromeAsync();
}
await CachedFileManager.CompleteUpdatesAsync(file);
return(new ExportResult(true, file));
}
}
catch (Exception ex)
{
await SimpleIoc.Default.GetInstance <IDialogService>()
.ShowMessageBox(ex.Message, Localization.Get("SaveImageError"));
}
return(new ExportResult(false, null));
}
private static string CleanFileName(FontVariant font, string fileName)
{
fileName = fileName ?? $"{font.FamilyName} {font.PreferredName}.ttf";
return($"{Humanizer.To.SentenceCase.Transform(Path.GetFileNameWithoutExtension(fileName))}{Path.GetExtension(fileName).ToLower()}");
}
public static async Task <ExportResult> ExportPngAsync(
ExportStyle style,
InstalledFont selectedFont,
FontVariant selectedVariant,
Character selectedChar,
CanvasTextLayoutAnalysis analysis,
CanvasTypography typography,
AppSettings settings)
{
try
{
string name = GetFileName(selectedFont, selectedVariant, selectedChar, "png");
if (await PickFileAsync(name, "PNG Image", new[] { ".png" }) is StorageFile file)
{
CachedFileManager.DeferUpdates(file);
if (analysis.GlyphFormats.Contains(GlyphImageFormat.Png))
{
IBuffer buffer = GetGlyphBuffer(selectedVariant.FontFace, selectedChar.UnicodeIndex, GlyphImageFormat.Png);
await FileIO.WriteBufferAsync(file, buffer);
}
else
{
var device = Utils.CanvasDevice;
var localDpi = 96; //Windows.Graphics.Display.DisplayInformation.GetForCurrentView().LogicalDpi;
var canvasH = (float)settings.PngSize;
var canvasW = (float)settings.PngSize;
using var renderTarget = new CanvasRenderTarget(device, canvasW, canvasH, localDpi);
using (var ds = renderTarget.CreateDrawingSession())
{
ds.Clear(Colors.Transparent);
var d = settings.PngSize;
var r = settings.PngSize / 2;
var textColor = style == ExportStyle.Black ? Colors.Black : Colors.White;
var fontSize = (float)d;
using CanvasTextLayout layout = new CanvasTextLayout(device, $"{selectedChar.Char}", new CanvasTextFormat
{
FontSize = fontSize,
FontFamily = selectedVariant.Source,
FontStretch = selectedVariant.FontFace.Stretch,
FontWeight = selectedVariant.FontFace.Weight,
FontStyle = selectedVariant.FontFace.Style,
HorizontalAlignment = CanvasHorizontalAlignment.Center,
Options = style == ExportStyle.ColorGlyph ? CanvasDrawTextOptions.EnableColorFont : CanvasDrawTextOptions.Default
}, canvasW, canvasH);
if (style == ExportStyle.ColorGlyph)
{
layout.Options = CanvasDrawTextOptions.EnableColorFont;
}
layout.SetTypography(0, 1, typography);
var db = layout.DrawBounds;
double scale = Math.Min(1, Math.Min(canvasW / db.Width, canvasH / db.Height));
var x = -db.Left + ((canvasW - (db.Width * scale)) / 2d);
var y = -db.Top + ((canvasH - (db.Height * scale)) / 2d);
ds.Transform =
Matrix3x2.CreateTranslation(new Vector2((float)x, (float)y))
* Matrix3x2.CreateScale(new Vector2((float)scale));
ds.DrawTextLayout(layout, new Vector2(0), textColor);
}
using var fileStream = await file.OpenAsync(FileAccessMode.ReadWrite);
fileStream.Size = 0;
await renderTarget.SaveAsync(fileStream, CanvasBitmapFileFormat.Png, 1f);
}
await CachedFileManager.CompleteUpdatesAsync(file);
return(new ExportResult(true, file));
}
}
catch (Exception ex)
{
await SimpleIoc.Default.GetInstance <IDialogService>()
.ShowMessageBox(ex.Message, Localization.Get("SaveImageError"));
}
return(new ExportResult(false, null));
}