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Add built-in ThumbnailViewer plugin

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ema
2025-07-05 04:22:25 +08:00
parent 3de93386cc
commit f99a786510
13 changed files with 508 additions and 20 deletions
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41
QuickLook.Plugin/QuickLook.Plugin.ImageViewer/Helper.cs
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@@ -20,13 +20,50 @@ using System;
using System.IO;
using System.Reflection;
using System.Text;
using System.Windows;
using System.Windows.Media.Imaging;
namespace QuickLook.Plugin.ImageViewer;
internal class Helper
internal static class Helper
{
public static void DpiHack(BitmapSource img)
public static BitmapSource InvertColors(this BitmapSource source)
{
WriteableBitmap writableBitmap = new(source);
writableBitmap.Lock();
nint pBackBuffer = writableBitmap.BackBuffer;
int stride = writableBitmap.BackBufferStride;
int width = writableBitmap.PixelWidth;
int height = writableBitmap.PixelHeight;
int bytesPerPixel = (writableBitmap.Format.BitsPerPixel + 7) / 8;
unsafe
{
byte* pPixels = (byte*)pBackBuffer;
for (int y = 0; y < height; y++)
{
Span<byte> row = new(pPixels + y * stride, width * bytesPerPixel);
for (int x = 0; x < width; x++)
{
int index = x * bytesPerPixel;
row[index] = (byte)(255 - row[index]);
row[index + 1] = (byte)(255 - row[index + 1]);
row[index + 2] = (byte)(255 - row[index + 2]);
}
}
}
writableBitmap.AddDirtyRect(new Int32Rect(0, 0, width, height));
writableBitmap.Unlock();
return writableBitmap;
}
public static void DpiHack(this BitmapSource img)
{
// a dirty hack... but is the fastest