git: openjdk/jfx-sandbox: direct3d12: Add prism.d3d12.clearOpts configuration property

[duke]

Changeset: 7078d621
Branch: direct3d12
Author:    Lukasz Kostyra <lukasz.kostyra at oracle.com>
Date:      2025-12-03 16:02:01 +0000
URL:       https://git.openjdk.org/jfx-sandbox/commit/7078d621dc282ab8439800b84b78377dec3eea89

Add prism.d3d12.clearOpts configuration property

Defaults to true; can be used to disable clear region optimizations
(discarding clears + RTT dirty region tracking).

! modules/javafx.graphics/src/main/native-prism-d3d12/Internal/D3D12Config.cpp
! modules/javafx.graphics/src/main/native-prism-d3d12/Internal/D3D12Config.hpp
! modules/javafx.graphics/src/main/native-prism-d3d12/Internal/D3D12RenderingContext.cpp