From 899e540d46adb72f212091ffb5fd3bf2262a556c Mon Sep 17 00:00:00 2001
From: Mikolaj Boc <mikolaj.boc@qt.io>
Date: Tue, 1 Nov 2022 12:53:11 +0100
Subject: [PATCH] Use offsetX/offsetY for pointer events
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qtwasmcompositor expects coordinates relative to the canvas. Provide
that by using pointer events' offsetX/offsetY instead of the viewport
x/y.

Fixes: QTBUG-108128
Fixes: QTBUG-106031
Pick-to: 6.4 6.4.1
Change-Id: I76c553b7b7e350fd873b18c775848217a4905f3d
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
---
 src/plugins/platforms/wasm/qwasmevent.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/plugins/platforms/wasm/qwasmevent.cpp b/src/plugins/platforms/wasm/qwasmevent.cpp
index b094dbfe140..f066d0041ec 100644
--- a/src/plugins/platforms/wasm/qwasmevent.cpp
+++ b/src/plugins/platforms/wasm/qwasmevent.cpp
@@ -43,7 +43,7 @@ std::optional<PointerEvent> PointerEvent::fromWeb(emscripten::val event)
         PointerType::Mouse : PointerType::Other;
     ret.mouseButton = MouseEvent::buttonFromWeb(event["button"].as<int>());
     ret.mouseButtons = MouseEvent::buttonsFromWeb(event["buttons"].as<unsigned short>());
-    ret.point = QPoint(event["x"].as<int>(), event["y"].as<int>());
+    ret.point = QPoint(event["offsetX"].as<int>(), event["offsetY"].as<int>());
     ret.pointerId = event["pointerId"].as<int>();
     ret.modifiers = KeyboardModifier::getForEvent(event);