From 6b62dfe7242ce0d3067aa98620664a4dc7a656d8 Mon Sep 17 00:00:00 2001
From: Peter Varga <pvarga@inf.u-szeged.hu>
Date: Fri, 20 Mar 2020 15:52:51 +0100
Subject: Fix CSS backdrop-filter
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Task-number: QTBUG-82842
Change-Id: I79394cf726d9c5d16881fa8c07b43d28fa43e026
Reviewed-by: Jüri Valdmann <juri.valdmann@qt.io>
---
 src/core/compositor/display_gl_output_surface.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/core/compositor')

diff --git a/src/core/compositor/display_gl_output_surface.cpp b/src/core/compositor/display_gl_output_surface.cpp
index 0077af112..ef12cc71b 100644
--- a/src/core/compositor/display_gl_output_surface.cpp
+++ b/src/core/compositor/display_gl_output_surface.cpp
@@ -273,7 +273,7 @@ void DisplayGLOutputSurface::ApplyExternalStencil()
 // glCopyTexSubImage2D on our framebuffer.
 uint32_t DisplayGLOutputSurface::GetFramebufferCopyTextureFormat()
 {
-    return GL_RGBA;
+    return m_currentShape.hasAlpha ? GL_RGBA : GL_RGB;
 }
 
 // Called from viz::DirectRenderer::DrawFrame, only used for overlays.
-- 
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