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enhance: new image blend algorithm

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This commit is contained in:
leo 2024-06-21 23:07:11 +08:00
parent 2a85f26754
commit 73e450c684
1 changed files with 19 additions and 11 deletions
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30
src/Views/ImageDiffView.axaml.cs
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@ -239,19 +239,27 @@ namespace SourceGit.Views
var rect = new Rect(0, 0, Bounds.Width, Bounds.Height); var rect = new Rect(0, 0, Bounds.Width, Bounds.Height);
var alpha = Alpha; var alpha = Alpha;
var left = OldImage; var left = OldImage;
if (left != null && alpha < 1)
{
var state = context.PushOpacity(1- alpha);
context.DrawImage(left, rect);
state.Dispose();
}
var right = NewImage; var right = NewImage;
if (right != null && alpha > 0)
var drawLeft = left != null && alpha < 1.0;
var drawRight = right != null && alpha > 0;
if (drawLeft)
{ {
var state = context.PushOpacity(alpha); using (context.PushRenderOptions(new RenderOptions() { BitmapBlendingMode = BitmapBlendingMode.Source }))
context.DrawImage(right, rect); using (context.PushOpacity(1 - alpha))
state.Dispose(); context.DrawImage(left, rect);
if (drawRight)
{
using (context.PushRenderOptions(new RenderOptions() { BitmapBlendingMode = BitmapBlendingMode.Plus }))
using (context.PushOpacity(alpha))
context.DrawImage(right, rect);
}
}
else if (drawRight)
{
using (context.PushOpacity(alpha))
context.DrawImage(right, rect);
} }
} }