From d385b81da322b29a4d951a8a72f2d00e2fe9c84f Mon Sep 17 00:00:00 2001
From: Mike Kaganski <mike.kaganski@collabora.com>
Date: Wed, 19 Aug 2026 08:05:02 +0000
Subject: [PATCH] Avoid second call to CreateAlphaMask

This is an expensive operation.

Change-Id: I4ffd17de84d324dcb091905927d9ef7423fdb1c9
Signed-off-by: Mike Kaganski <mike.kaganski@collabora.com>
Reviewed-on: https://gerrit.collaboraoffice.com/c/online/+/9505
Tested-by: Jenkins CPCI <releng@collaboraoffice.com>
Reviewed-by: Noel Grandin <noel.grandin@collabora.com>
(cherry picked from commit 9e2d6727f27caa7663a18564f46bb4a90b3b87a3)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/209508
Reviewed-by: Xisco Fauli <xiscofauli@libreoffice.org>
Tested-by: Xisco Fauli <xiscofauli@libreoffice.org>
---
 drawinglayer/source/primitive2d/graphicprimitivehelper2d.cxx | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drawinglayer/source/primitive2d/graphicprimitivehelper2d.cxx b/drawinglayer/source/primitive2d/graphicprimitivehelper2d.cxx
index 58b1a55ed84d..8356ea6aabac 100644
--- a/drawinglayer/source/primitive2d/graphicprimitivehelper2d.cxx
+++ b/drawinglayer/source/primitive2d/graphicprimitivehelper2d.cxx
@@ -349,7 +349,8 @@ namespace drawinglayer::primitive2d
                         case Disposal::Previous:
                         {
                             maVirtualDevice->DrawBitmap(rAnimationFrame.maPositionPixel, rAnimationFrame.maBitmap);
-                            Bitmap aExpandVisibilityMask(rAnimationFrame.maBitmap.CreateAlphaMask().GetBitmap(), rAnimationFrame.maBitmap.CreateAlphaMask());
+                            AlphaMask aAlphaMask(rAnimationFrame.maBitmap.CreateAlphaMask());
+                            Bitmap aExpandVisibilityMask(aAlphaMask.GetBitmap(), aAlphaMask);
                             maVirtualDeviceMask->DrawBitmap(rAnimationFrame.maPositionPixel, aExpandVisibilityMask);
                             break;
                         }