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enhance: do NOT use render target when there's only added or delete image.

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leo 2024-06-22 14:00:49 +08:00
parent dde5d4a2a8
commit 4e8e39d2fe
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1 changed files with 20 additions and 27 deletions
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47
src/Views/ImageDiffView.axaml.cs
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@ -244,42 +244,35 @@ namespace SourceGit.Views
var right = NewImage; var right = NewImage;
var drawLeft = left != null && alpha < 1.0; var drawLeft = left != null && alpha < 1.0;
var drawRight = right != null && alpha > 0; var drawRight = right != null && alpha > 0;
var psize = left == null ? right.PixelSize : left.PixelSize;
var dpi = left == null ? right.Dpi : left.Dpi;
using (var rt = new RenderTargetBitmap(psize, dpi)) if (drawLeft && drawRight)
{ {
var rtRect = new Rect(rt.Size); using (var rt = new RenderTargetBitmap(right.PixelSize, right.Dpi))
using (var dc = rt.CreateDrawingContext())
{ {
if (drawLeft) var rtRect = new Rect(rt.Size);
{ using (var dc = rt.CreateDrawingContext())
if (drawRight)
{
using (dc.PushRenderOptions(RO_SRC))
using (dc.PushOpacity(1 - alpha))
dc.DrawImage(left, rtRect);
using (dc.PushRenderOptions(RO_DST))
using (dc.PushOpacity(alpha))
dc.DrawImage(right, rtRect);
}
else
{
using (dc.PushRenderOptions(RO_SRC))
using (dc.PushOpacity(1 - alpha))
dc.DrawImage(left, rtRect);
}
}
else if (drawRight)
{ {
using (dc.PushRenderOptions(RO_SRC)) using (dc.PushRenderOptions(RO_SRC))
using (dc.PushOpacity(1 - alpha))
dc.DrawImage(left, rtRect);
using (dc.PushRenderOptions(RO_DST))
using (dc.PushOpacity(alpha)) using (dc.PushOpacity(alpha))
dc.DrawImage(right, rtRect); dc.DrawImage(right, rtRect);
} }
}
context.DrawImage(rt, rtRect, rect); context.DrawImage(rt, rtRect, rect);
}
}
else if (drawLeft)
{
using (context.PushOpacity(1 - alpha))
context.DrawImage(left, rect);
}
else if (drawRight)
{
using (context.PushOpacity(alpha))
context.DrawImage(right, rect);
} }
} }