From 81c73306712e4938b6c8cc41a2b6ccdf417b79cc Mon Sep 17 00:00:00 2001
From: David Edmundson <kde@davidedmundson.co.uk>
Date: Wed, 2 Oct 2019 20:51:47 +0100
Subject: [PATCH] [scenes/opengl] Set correct blend mode for EffectQuickView
 buffers

Summary:
Everything is already multiplied in the buffer, we want to copy the
source directly.

Test Plan:
Looked at something with EffectQuickView and alpha
It now matched what it should be

Reviewers: #kwin, zzag

Reviewed By: #kwin, zzag

Subscribers: kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D24368
---
 plugins/scenes/opengl/scene_opengl.cpp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/plugins/scenes/opengl/scene_opengl.cpp b/plugins/scenes/opengl/scene_opengl.cpp
index 157159c526..d566a8bd2f 100644
--- a/plugins/scenes/opengl/scene_opengl.cpp
+++ b/plugins/scenes/opengl/scene_opengl.cpp
@@ -874,8 +874,7 @@ void SceneOpenGL::paintEffectQuickView(EffectQuickView *w)
     shader->setUniform(GLShader::ModelViewProjectionMatrix, mvp);
 
     glEnable(GL_BLEND);
-    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-
+    glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
     t->bind();
     t->render(QRegion(infiniteRegion()), w->geometry());
     t->unbind();