From c02af3902602934ee3d844a5f5d62e18338e99de Mon Sep 17 00:00:00 2001
From: William Wedler <william.wedler@videoray.com>
Date: Mon, 22 Apr 2024 10:35:18 -0400
Subject: [PATCH] fix: qml6glsink: video content resizes to new item size

Mark geometry dirty when the item rectangle changes in the
QtGLVideoItem::updatePaintNode method. This allows changes in the bounding
rectangle to be applied to the scene graph geometry node.

Fixes #3493

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/6711>
---
 subprojects/gst-plugins-good/ext/qt6/qt6glitem.cc | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/subprojects/gst-plugins-good/ext/qt6/qt6glitem.cc b/subprojects/gst-plugins-good/ext/qt6/qt6glitem.cc
index 5bc7003e6e..5314b01acd 100644
--- a/subprojects/gst-plugins-good/ext/qt6/qt6glitem.cc
+++ b/subprojects/gst-plugins-good/ext/qt6/qt6glitem.cc
@@ -73,6 +73,7 @@ struct _Qt6GLVideoItemPrivate
   GstCaps *caps;
   GstVideoInfo new_v_info;
   GstVideoInfo v_info;
+  GstVideoRectangle v_rect;
 
   gboolean initted;
   GstGLDisplay *display;
@@ -374,6 +375,11 @@ Qt6GLVideoItem::updatePaintNode(QSGNode * oldNode,
   QRectF rect(result.x, result.y, result.w, result.h);
   QRectF sourceRect(0, 0, 1, 1);
   QSGGeometry::updateTexturedRectGeometry(geometry, rect, sourceRect);
+  if(priv->v_rect.x != result.x || priv->v_rect.y != result.y ||
+     priv->v_rect.w != result.w || priv->v_rect.h != result.h) {
+    texNode->markDirty(QSGNode::DirtyGeometry);
+    priv->v_rect = result;
+  }
 
   g_mutex_unlock (&this->priv->lock);