Merge pull request #7736 from stenzek/imgui-hidpi
RenderWidget: Fix mouse position for imgui on hidpi screens
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b14e540671
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@ -284,8 +284,13 @@ void RenderWidget::PassEventToImGui(const QEvent* event)
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case QEvent::MouseMove:
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{
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auto lock = g_renderer->GetImGuiLock();
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ImGui::GetIO().MousePos.x = static_cast<const QMouseEvent*>(event)->x();
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ImGui::GetIO().MousePos.y = static_cast<const QMouseEvent*>(event)->y();
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// Qt multiplies all coordinates by the scaling factor in highdpi mode, giving us "scaled" mouse
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// coordinates (as if the screen was standard dpi). We need to update the mouse position in
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// native coordinates, as the UI (and game) is rendered at native resolution.
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const float scale = devicePixelRatio();
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ImGui::GetIO().MousePos.x = static_cast<const QMouseEvent*>(event)->x() * scale;
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ImGui::GetIO().MousePos.y = static_cast<const QMouseEvent*>(event)->y() * scale;
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}
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break;
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