''
'' This code is part of Document Solutions for Imaging demos.
'' Copyright (c) MESCIUS inc. All rights reserved.
''
Imports System
Imports System.IO
Imports System.Drawing
Imports System.Linq
Imports System.Collections.Generic
Imports GrapeCity.Documents.Imaging
Imports GrapeCity.Documents.Text
Imports GrapeCity.Documents.Drawing
Imports GrapeCity.Documents.Svg
Imports GCTEXT = GrapeCity.Documents.Text
Imports GCDRAW = GrapeCity.Documents.Drawing
'' This sample shows how to render SVG icons included in the "Free for Web" download of Font Awesome.
'' The sample code also shows how to change the default color of the glyphs.
Public Class SvgFontAwesome
Private _rnd As Random = Util.NewRandom()
Public Function GenerateImageStream(
ByVal targetMime As String,
ByVal pixelSize As Size,
ByVal dpi As Single,
ByVal opaque As Boolean,
Optional ByVal sampleParams As String() = Nothing) As Stream
If sampleParams Is Nothing Then
sampleParams = GetSampleParamsList()(0)
End If
'' Font and format for captions:
Const sMargin As Single = 96.0F / 8.0F
Dim font = GCTEXT.Font.FromFile(Path.Combine("Resources", "Fonts", "FreeSans.ttf"))
Dim tf = New TextFormat() With {.Font = font, .FontSize = sMargin * 0.65F}
'' Set up a layout grid:
Dim background = Color.White
Dim foreground = Color.Black
Const margin As Single = 36.0F
Const rows As Integer = 10
Const cols As Integer = 10
Dim gapx As Single = 96.0F / 8.0F, gapy As Single = gapx
Dim sWidth As Single = (pixelSize.Width - margin * 2 + gapx) / cols
Dim sHeight As Single = (pixelSize.Height - margin * 2 + gapy) / rows
If sWidth > sHeight Then
gapx += sWidth - sHeight
sWidth = sHeight
Else
gapy += sHeight - sWidth
sHeight = sWidth
End If
Dim ip As New PointF(margin, margin)
Dim colorize As Boolean = (sampleParams(3) = "colorize")
Dim maxFiles As Integer = If(targetMime = Util.MimeTypes.TIFF, Integer.MaxValue, rows * cols)
Dim basePath = Path.Combine("Resources", "FontAwesome", If(colorize, String.Empty, sampleParams(3)))
Dim fileNames = Directory.GetFiles(basePath, "*.svg", SearchOption.AllDirectories).ToList()
If colorize Then
fileNames.Shuffle()
Else
fileNames.Sort(StringComparer.Ordinal)
End If
Dim files = fileNames.Take(maxFiles)
Dim images As New List(Of Tuple(Of String, GcSvgDocument))(files.Count())
For Each fname In files
images.Add(Tuple.Create(fname, GcSvgDocument.FromFile(fname)))
Next
'' Render all images within the grid, adding new pages as needed:
Dim bmp = New GcBitmap(pixelSize.Width, pixelSize.Height, False, dpi, dpi)
Dim g = bmp.CreateGraphics(Color.White)
Dim ms As New MemoryStream()
Dim tw As GcTiffWriter = Nothing
If targetMime = Util.MimeTypes.TIFF Then
tw = New GcTiffWriter(ms)
End If
For i As Integer = 0 To images.Count() - 1
'' Draw border around image:
Dim rect As New RectangleF(ip, New SizeF(sWidth - gapx, sHeight - gapy))
g.FillRectangle(rect, background)
g.DrawRectangle(rect, foreground, 0.5F)
rect.Inflate(-sMargin, -sMargin)
'' Draw the SVG:
Dim svg = images(i).Item2
Dim s = svg.GetIntrinsicSize(SvgLengthUnits.Points)
If s.Width > 0 AndAlso s.Height > 0 Then
'' If image proportions are different from our target rectangle,
'' we resize the rectangle centering the image in it:
Dim qSrc = s.Width / s.Height
Dim qTgt = rect.Width / rect.Height
If qSrc < qTgt Then
rect.Inflate(rect.Width * (qSrc / qTgt - 1) / 2.0F, 0)
ElseIf qSrc > qTgt Then
rect.Inflate(0, rect.Height * (qTgt / qSrc - 1) / 2.0F)
End If
End If
If colorize Then
svg.RootSvg.Fill = New SvgPaint(Color.FromArgb(_rnd.Next(256), _rnd.Next(256), _rnd.Next(256)))
End If
'' Render the SVG:
g.DrawSvg(svg, rect)
'' Print the icon file name as caption in the bottom margin:
g.DrawString(Path.GetFileNameWithoutExtension(images(i).Item1), tf,
New RectangleF(rect.X, rect.Bottom, rect.Width, sMargin),
TextAlignment.Center, ParagraphAlignment.Near, False)
ip.X += sWidth
If (ip.X + sWidth > pixelSize.Width) AndAlso (i < images.Count() - 1) Then
ip.X = margin
ip.Y += sHeight
If ip.Y + sHeight > pixelSize.Height Then
If targetMime <> Util.MimeTypes.TIFF Then
Throw New Exception("Unexpected: should get here only if target is TIFF.")
End If
tw.AppendFrame(bmp)
bmp.Clear(Color.White)
ip.Y = margin
End If
End If
Next
Select Case targetMime
Case Util.MimeTypes.TIFF
tw.Dispose()
Case Util.MimeTypes.JPEG
bmp.SaveAsJpeg(ms)
Case Util.MimeTypes.PNG
bmp.SaveAsPng(ms)
Case Util.MimeTypes.BMP
bmp.SaveAsBmp(ms)
Case Util.MimeTypes.GIF
bmp.SaveAsGif(ms)
Case Util.MimeTypes.WEBP
bmp.SaveAsWebp(ms)
Case Else
Throw New Exception($"Encoding {targetMime} is not supported.")
End Select
bmp.Dispose()
g.Dispose()
'' Dispose images when done:
images.ForEach(Sub(t_) t_.Item2.Dispose())
Return ms
End Function
Public Shared Function GetSampleParamsList() As List(Of String())
'' Strings are name, description, info, rest are arbitrary strings:
Return New List(Of String()) From {
New String() {"@b-svg/Font Awesome - brands", "Render Font Awesome SVG glyphs from the ""svgs/brands"" directory",
"This sample renders the SVG icons included in the ""svgs/brands/"" directory of the Font Awesome ""Free for Web"" download, sorted by file name.",
"brands"},
New String() {"@b-svg/Font Awesome - regular", "Render Font Awesome SVG glyphs from the ""svgs/brands"" directory",
"This sample renders the SVG icons included in the ""svgs/regular/"" directory of the Font Awesome ""Free for Web"" download, sorted by file name.",
"regular"},
New String() {"@b-svg/Font Awesome - solid", "Render Font Awesome SVG glyphs from the ""svgs/solid"" directory",
"This sample renders the SVG icons included in the ""svgs/solid/"" directory of the Font Awesome ""Free for Web"" download, sorted by file name.",
"solid"},
New String() {"@b-svg/Font Awesome - colorize", "Render Font Awesome SVG glyphs using random order and colors",
"This sample renders the SVG icons included in the ""svgs/"" directory of the Font Awesome ""Free for Web"" download, randomizing the order of the icons and their colors.",
"colorize"}
}
End Function
End Class