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Add bitmap cache

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This commit is contained in:
Julien Richard 2022-01-16 16:04:04 +01:00
commit 076a8d23bd
1 changed files with 32 additions and 5 deletions
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37
src/Greenshot.Editor/Drawing/EmojiContainer.cs
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@ -36,7 +36,6 @@ using Greenshot.Base.Interfaces.Drawing;
using Greenshot.Editor.Helpers;
using Image = System.Drawing.Image;
using Matrix = System.Drawing.Drawing2D.Matrix;
using Point = System.Drawing.Point;
using Size = System.Windows.Size;
namespace Greenshot.Editor.Drawing
@ -53,6 +52,7 @@ namespace Greenshot.Editor.Drawing
[NonSerialized] private System.Windows.Controls.Image _image;
[NonSerialized] private bool _justCreated = true;
[NonSerialized] private Image _cachedImage = null;
private string _emoji;
private int _rotationAngle;
@ -148,11 +148,23 @@ namespace Greenshot.Editor.Drawing
PropertyChanged += OnPropertyChanged;
}
protected override void Dispose(bool disposing)
{
if (disposing)
{
ResetCachedBitmap();
}
base.Dispose(disposing);
}
public override void Transform(Matrix matrix)
{
_rotationAngle += CalculateAngle(matrix);
_rotationAngle %= 360;
ResetCachedBitmap();
base.Transform(matrix);
}
@ -185,12 +197,23 @@ namespace Greenshot.Editor.Drawing
var iconSize = Math.Min(rect.Width, rect.Height);
if (iconSize > 0)
{
using var bitmap = GetBitmap(iconSize);
graphics.DrawImage(bitmap, Bounds);
if (_cachedImage == null)
{
// First draw or cache was invalidated
_cachedImage = ComputeBitmap(iconSize);
}
else if (iconSize != _cachedImage.Width)
{
// The elements was resized => recompute
_cachedImage.Dispose();
_cachedImage = ComputeBitmap(iconSize);
}
graphics.DrawImage(_cachedImage, Bounds);
}
}
private Image GetBitmap(int iconSize)
private Image ComputeBitmap(int iconSize)
{
_image.Measure(new Size(iconSize, iconSize));
_image.Arrange(new Rect(0, 0, iconSize, iconSize));
@ -211,7 +234,11 @@ namespace Greenshot.Editor.Drawing
return bitmap;
}
private void ResetCachedBitmap()
{
_cachedImage?.Dispose();
_cachedImage = null;
}
}
internal static class PickerExtensions