From ff65bec92ce05b34a756b852eda60ca68e65dc9f Mon Sep 17 00:00:00 2001
From: Aleix Pol <aleixpol@kde.org>
Date: Wed, 22 Jul 2020 19:10:09 +0200
Subject: [PATCH] Introduce a GLTexture::toImage helper class

---
 libkwineffects/kwingltexture.cpp | 7 +++++++
 libkwineffects/kwingltexture.h   | 2 ++
 2 files changed, 9 insertions(+)

diff --git a/libkwineffects/kwingltexture.cpp b/libkwineffects/kwingltexture.cpp
index 467fbbfb3d..87664ada20 100644
--- a/libkwineffects/kwingltexture.cpp
+++ b/libkwineffects/kwingltexture.cpp
@@ -683,4 +683,11 @@ bool GLTexture::supportsFormatRG()
     return GLTexturePrivate::s_supportsTextureFormatRG;
 }
 
+QImage GLTexture::toImage() const
+{
+    QImage ret(size(), QImage::Format_RGBA8888_Premultiplied);
+    glGetTextureImage(texture(), 0, GL_RGBA, GL_UNSIGNED_INT_8_8_8_8_REV, ret.sizeInBytes(), ret.bits());
+    return ret;
+}
+
 } // namespace KWin
diff --git a/libkwineffects/kwingltexture.h b/libkwineffects/kwingltexture.h
index 09474466a4..4620362a6c 100644
--- a/libkwineffects/kwingltexture.h
+++ b/libkwineffects/kwingltexture.h
@@ -113,6 +113,8 @@ public:
     GLenum filter() const;
     GLenum internalFormat() const;
 
+    QImage toImage() const;
+
     /** @short
      * Make the texture fully transparent
      */