From 9d2b27aebb862ed6ad3fa88760efd49369a4e4ae Mon Sep 17 00:00:00 2001
From: Vlad Zahorodnii <vlad.zahorodnii@kde.org>
Date: Sat, 24 Oct 2020 16:23:21 +0000
Subject: [PATCH] scenes/opengl: Properly render cursors with hidpi

GLTexture::width() and GLTexture::height() return the size of the cursor
texture in native pixels, but we need a size in device independent pixels.

CCBUG: 424589


(cherry picked from commit 6b940c128019823034d872cc7ae717330d92d43f)
---
 plugins/scenes/opengl/scene_opengl.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/plugins/scenes/opengl/scene_opengl.cpp b/plugins/scenes/opengl/scene_opengl.cpp
index 79f3445784..7916a42e34 100644
--- a/plugins/scenes/opengl/scene_opengl.cpp
+++ b/plugins/scenes/opengl/scene_opengl.cpp
@@ -585,8 +585,9 @@ void SceneOpenGL2::paintCursor()
     }
 
     // get cursor position in projection coordinates
+    const qreal scale = cursor->image().devicePixelRatio();
     const QPoint cursorPos = cursor->pos() - cursor->hotspot();
-    const QRect cursorRect(0, 0, m_cursorTexture->width(), m_cursorTexture->height());
+    const QRect cursorRect(QPoint(0, 0), m_cursorTexture->size() / scale);
     QMatrix4x4 mvp = m_projectionMatrix;
     mvp.translate(cursorPos.x(), cursorPos.y());