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GalleryShare
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Refactor file thumbnail generation into own method

This commit is contained in:
Starbeamrainbowlabs 2016-08-10 19:12:15 +01:00
parent 9adadd491d
commit 438cb63bc3
1 changed files with 18 additions and 14 deletions
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32
GalleryShare/ThumbnailGenerator.cs
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@ -7,6 +7,7 @@ using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.Runtime.InteropServices;
using System.Net;
using System.Reflection;
namespace GalleryShare
{
@ -14,7 +15,19 @@ namespace GalleryShare
{
public static async Task SendThumbnailPng(string imagePath, Size thumbnailBounds, HttpListenerContext cycle)
{
Image imageToSend;
Image imageToSend = GenerateFileThumbnail(imagePath, thumbnailBounds);
byte[] imageData = GetImageBytesPng(imageToSend);
cycle.Response.ContentType = "image/png";
cycle.Response.ContentLength64 = imageData.LongLength;
await cycle.Response.OutputStream.WriteAsync(imageData, 0, imageData.Length);
imageToSend.Dispose();
}
public static Image GenerateFileThumbnail(string imagePath, Size thumbnailBounds)
{
try {
using (Bitmap rawImage = new Bitmap(imagePath)) {
float scaleFactor = Math.Min(
@ -25,7 +38,7 @@ namespace GalleryShare
(int)(rawImage.Width * scaleFactor),
(int)(rawImage.Height * scaleFactor)
);
Bitmap smallImage = new Bitmap(thumbnailSize.Width, thumbnailSize.Height);
using (Graphics context = Graphics.FromImage(smallImage)) {
context.CompositingMode = CompositingMode.SourceCopy;
@ -34,9 +47,9 @@ namespace GalleryShare
Point.Empty,
thumbnailSize
));
//smallImage.Save(outputStream, ImageFormat.Png);
imageToSend = smallImage;
return smallImage;
}
}
}
@ -50,18 +63,9 @@ namespace GalleryShare
using (Font drawingFont = new Font("Sans-serif", 12f, FontStyle.Regular, GraphicsUnit.Pixel))
{
imageToSend = GenerateErrorImage(error.Message, drawingFont, Color.DarkGray, Color.Transparent);
return GenerateErrorImage(error.Message, drawingFont, Color.DarkGray, Color.Transparent);
}
}
byte[] imageData = GetImageBytesPng(imageToSend);
cycle.Response.ContentType = "image/png";
cycle.Response.ContentLength64 = imageData.LongLength;
await cycle.Response.OutputStream.WriteAsync(imageData, 0, imageData.Length);
imageToSend.Dispose();
}
public static Image GenerateErrorImage(string errorText, Font textFont, Color foregroundColour, Color backgroundColour)