Skip to content

Instantly share code, notes, and snippets.

Embed
What would you like to do?
GcImagingOperations
using System;
using System.IO;
using System.Drawing;
using GrapeCity.Documents.Drawing;
using GrapeCity.Documents.Text;
using GrapeCity.Documents.Imaging;
namespace GCImagingAWSLambdaS3
{
public class GcImagingOperations
{
public static string GetGrayScale(Stream stream)
{
using (var bmp = new GcBitmap())
{
bmp.Load(stream);
bmp.ApplyEffect(GrayscaleEffect.Get(GrayscaleStandard.BT601));
return GetBase64(bmp);
}
}
public static string GetThumbnail(Stream stream)
{
using (var origBmp = new GcBitmap())
{
origBmp.Load(stream);
var bmp = origBmp.Resize(100, 100, InterpolationMode.NearestNeighbor);
return GetBase64(bmp);
}
}
public static string GetEnlarged(Stream stream)
{
using (var origBmp = new GcBitmap())
{
origBmp.Load(stream);
var bmp = origBmp.Resize(
origBmp.PixelWidth * 2,
origBmp.PixelHeight * 2,
InterpolationMode.NearestNeighbor);
return GetBase64(bmp);
}
}
public static string GetWaterMarked(Stream stream)
{
using (var bmp = new GcBitmap())
{
bmp.Load(stream);
using (var g = bmp.CreateGraphics(Color.White))
{
g.DrawString("Watermark", new TextFormat
{
FontSize = 96,
ForeColor = Color.FromArgb(128, Color.Yellow),
Font = FontCollection.SystemFonts.DefaultFont
},
new RectangleF(0, 0, bmp.Width, bmp.Height),
TextAlignment.Center, ParagraphAlignment.Center, false);
}
return GetBase64(bmp);
}
}
public static string GetCustomImage(Stream stream)
{
using (var bmp = new GcBitmap())
{
bmp.Load(stream);
// Perform custom operations
using (var g = bmp.CreateGraphics(Color.White))
{
// draw a solid red border on the image
g.DrawRectangle(
new RectangleF(0, 0, bmp.Width, bmp.Height),
Color.Red,
2,
DashStyle.Solid);
// Add a yellow watermark at bottom right corner
var wmRect = g.MeasureString(
"Created using GCImagingAWSLambdaS3 Lambda",
new TextFormat
{
FontSize = 18,
ForeColor = Color.FromArgb(128, Color.Yellow),
Font = FontCollection.SystemFonts.DefaultFont
});
g.DrawString(
"Created using GCImagingAWSLambdaS3 Lambda",
new TextFormat
{
FontSize = 18,
ForeColor = Color.FromArgb(128, Color.Yellow),
Font = FontCollection.SystemFonts.DefaultFont
},
new RectangleF(
bmp.Width - wmRect.Width,
bmp.Height - wmRect.Height,
wmRect.Width,
wmRect.Height),
TextAlignment.Center,
ParagraphAlignment.Center,
false);
}
return GetBase64(bmp);
}
}
#region helper
private static string GetBase64(GcBitmap bmp)
{
using (Image image = Image.FromGcBitmap(bmp, true))
{
using (MemoryStream m = new MemoryStream())
{
bmp.SaveAsPng(m);
return Convert.ToBase64String(m.ToArray());
}
}
}
#endregion
}
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.