public void AddPictureWaterMark()
{
string webRootPath = hostingEnvironment.WebRootPath;
var baseImage = Path.Combine(webRootPath, "ticket/ticketprototype.png");
for (int i = 0; i < 5; i++)
{
QRCodeGenerator qrGenerator = new QRCodeGenerator();
QRCodeData qrCodeData = qrGenerator.CreateQrCode("nguye van ana hoan" + i, QRCodeGenerator.ECCLevel.Q);
QRCode qrCode = new QRCode(qrCodeData);
var qrCodeImage = qrCode.GetGraphic(20, Color.Black, Color.White, iconBorderWidth: 0, iconSizePercent: 100, drawQuietZones: false).ImageToByte();
var outputPath = Path.Combine(webRootPath, $"ticket/output/ticket_{i}.png");
SixLabors.Fonts.Font font = SixLabors.Fonts.SystemFonts.CreateFont("Arial", 12); // for scaling water mark size is largly ignored.
using (var img = SixLabors.ImageSharp.Image.Load(baseImage))
{
using (var img2 = img.Clone(ctx => ctx.ApplyScalingLogoWaterMark(qrCodeImage)))
{
img2.Save(outputPath);
}
//using (var img2 = img.Clone(ctx => ctx.ApplyScalingWaterMark(font, "A short piece of text", Rgba32.HotPink, 5, false)))
//{
// img2.Save("output/simple.png");
//}
}
}
}
protected override IMAGE32 Evaluate()
{
if (FontFamily == null)
{
return(null);
}
if (Size <= 0)
{
return(null);
}
var font = new SixLabors.Fonts.Font(FontFamily, Size);
var context = new SixLabors.Fonts.RendererOptions(font);
var characters = "0123456789ABCDEFGHIJKLM";
var padding = new Size(this.Padding, this.Padding);
var cellSize = context.GetGlypthMaxBounds(characters.ToCharArray()).OuterRound().Size;
cellSize += padding * 2;
var image = ImageFactory.CreateImage <Rgba32>(cellSize * 16);
foreach (var c in characters.ToArray())
{
_DrawGlyph(image, cellSize, padding, context, c);
}
return(image);
}
// https://docs.microsoft.com/es-es/typography/opentype/spec/ttch01
public static void TestGlyph()
{
var family = SixLabors.Fonts.SystemFonts.Find("arial");
var font = new SixLabors.Fonts.Font(family, 50);
var roptions = new SixLabors.Fonts.RendererOptions(font, 96);
var size1 = SixLabors.Fonts.TextMeasurer.Measure("f", roptions);
var size2 = SixLabors.Fonts.TextMeasurer.Measure("g", roptions);
}
public SizeF MeasureString(String text, Font font, int width, StringFormat format)
{
SixLabors.Fonts.FontFamily family = SixLabors.Fonts.SystemFonts.Find(font.Name);
//font.Bold
//font.Italic
//font.Underline
//font.Strikeout
SixLabors.Fonts.Font fo = new SixLabors.Fonts.Font(family, font.Size);
SixLabors.Fonts.RendererOptions ro = new SixLabors.Fonts.RendererOptions(fo);
SixLabors.Primitives.SizeF result = SixLabors.Fonts.TextMeasurer.Measure(text, ro);
return(new System.Drawing.SizeF(result.Width, result.Height));
}
public static Image <Rgba32> CreateGlyphImage(this SixLabors.Fonts.Font font, Char character, Rgba32 foreground)
{
var options = TextGraphicsOptions.Default;
var text = character.ToString();
var roptions = new SixLabors.Fonts.RendererOptions(font, 96);
var size = SixLabors.Fonts.TextMeasurer.Measure(text, roptions);
int w = (int)Math.Ceiling(size.Width);
int h = (int)Math.Ceiling(size.Height);
var img = new Image <Rgba32>(w, h);
img.Mutate(dc => dc.DrawText(options, text, font, foreground, System.Numerics.Vector2.Zero));
return(img);
}
public static IMAGE32 RenderText(this SixLabors.Fonts.FontFamily ffamily, string text, float fsize, float padding, COLOR color, TextGraphicsOptions options)
{
// http://sixlabors.com/2017/04/08/watermarks/
if (string.IsNullOrEmpty(text))
{
return(null);
}
var font = new SixLabors.Fonts.Font(ffamily, fsize);
var roptions = new SixLabors.Fonts.RendererOptions(font, 96);
var size = SixLabors.Fonts.TextMeasurer.Measure(text, roptions);
var w = (int)Math.Ceiling(size.Width + padding * 2);
var h = (int)Math.Ceiling(size.Height + padding * 2);
var img = new IMAGE32(w, h);
img.Mutate(dc => dc.DrawText(options, text, font, color, new System.Numerics.Vector2(padding, padding)));
return(img);
}
