FreeCAD WebAssembly development snapshot

src/Gui/Multisample.h

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+// SPDX-License-Identifier: LGPL-2.1-or-later
+
+/***************************************************************************
+ *   Copyright (c) 2024 Werner Mayer <wmayer[at]users.sourceforge.net>     *
+ *                                                                         *
+ *   This file is part of FreeCAD.                                         *
+ *                                                                         *
+ *   FreeCAD is free software: you can redistribute it and/or modify it    *
+ *   under the terms of the GNU Lesser General Public License as           *
+ *   published by the Free Software Foundation, either version 2.1 of the  *
+ *   License, or (at your option) any later version.                       *
+ *                                                                         *
+ *   FreeCAD is distributed in the hope that it will be useful, but        *
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of            *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU      *
+ *   Lesser General Public License for more details.                       *
+ *                                                                         *
+ *   You should have received a copy of the GNU Lesser General Public      *
+ *   License along with FreeCAD. If not, see                               *
+ *   <https://www.gnu.org/licenses/>.                                      *
+ *                                                                         *
+ **************************************************************************/
+
+#pragma once
+
+#include <map>
+#include <vector>
+#include <FCGlobal.h>
+#include <QOffscreenSurface>
+#include <QOpenGLContext>
+#include <QSurfaceFormat>
+
+namespace Gui
+{
+
+/** @name Anti-Aliasing modes of the rendered 3D scene
+ * Specifies Anti-Aliasing (AA) method
+ * - Smoothing enables OpenGL line and vertex smoothing (basically deprecated)
+ * - MSAA is hardware multi sampling (with 2, 4, 6 or 8 passes), a quite common and efficient AA
+ * technique
+ */
+//@{
+enum class AntiAliasing
+{
+    None = 0,
+    MSAA1x = 1,
+    MSAA2x = 2,
+    MSAA4x = 3,
+    MSAA6x = 5,
+    MSAA8x = 4
+};
+//@}
+
+class GuiExport Multisample
+{
+public:
+    Multisample();
+    bool testSamples(int num) const;
+    std::vector<std::pair<QString, AntiAliasing>> supported() const;
+    static int toSamples(AntiAliasing msaa);
+    static AntiAliasing toAntiAliasing(int samples);
+    static AntiAliasing readMSAAFromSettings();
+    static void writeMSAAToSettings(AntiAliasing msaa);
+
+private:
+    QSurfaceFormat format;
+    QOpenGLContext context;
+    QOffscreenSurface offscreen;
+};
+
+}  // namespace Gui