public static CanvasSvgDocument GenerateSvgDocument(
ICanvasResourceCreator device,
double width,
double height,
SVGPathReciever path)
{
return(GenerateSvgDocument(device, width, height, new List <SVGPathReciever> {
path
}));
}
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"));
}
}
