Gui: Add class Multisample to check supported MSAA modes
This commit is contained in:
wmayer
@@ -850,6 +850,7 @@ SET(View3D_CPP_SRCS
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Flag.cpp
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GLBuffer.cpp
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GLPainter.cpp
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Multisample.cpp
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MouseSelection.cpp
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NavigationStyle.cpp
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InventorNavigationStyle.cpp
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@@ -882,6 +883,7 @@ SET(View3D_SRCS
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Flag.h
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GLBuffer.h
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GLPainter.h
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Multisample.h
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MouseSelection.h
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NavigationStyle.h
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GestureNavigationStyle.h
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105
src/Gui/Multisample.cpp
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105
src/Gui/Multisample.cpp
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@@ -0,0 +1,105 @@
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// SPDX-License-Identifier: LGPL-2.1-or-later
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/***************************************************************************
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* Copyright (c) 2024 Werner Mayer <wmayer[at]users.sourceforge.net> *
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* *
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* This file is part of FreeCAD. *
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* *
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* FreeCAD is free software: you can redistribute it and/or modify it *
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* under the terms of the GNU Lesser General Public License as *
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* published by the Free Software Foundation, either version 2.1 of the *
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* License, or (at your option) any later version. *
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* *
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* FreeCAD is distributed in the hope that it will be useful, but *
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* WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
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* Lesser General Public License for more details. *
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* *
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* You should have received a copy of the GNU Lesser General Public *
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* License along with FreeCAD. If not, see *
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* <https://www.gnu.org/licenses/>. *
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* *
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**************************************************************************/
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#include "PreCompiled.h"
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#ifndef _PreComp_
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#include <QCoreApplication>
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#include <QOpenGLFramebufferObjectFormat>
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#endif
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#include "Multisample.h"
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using namespace Gui;
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// clang-format off
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static constexpr auto numMSAA {6};
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static constexpr auto idStr {0};
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static constexpr auto idEnum {1};
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static constexpr auto idMSAA {2};
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static constexpr std::array<std::tuple<std::string_view, AntiAliasing, int>, numMSAA> textMSAA {{
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{QT_TRANSLATE_NOOP("Gui::Dialog::DlgSettings3DView", "None"), AntiAliasing::None, 0},
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{QT_TRANSLATE_NOOP("Gui::Dialog::DlgSettings3DView", "Line Smoothing"), AntiAliasing::MSAA1x, 1},
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{QT_TRANSLATE_NOOP("Gui::Dialog::DlgSettings3DView", "MSAA 2x"), AntiAliasing::MSAA2x, 2},
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{QT_TRANSLATE_NOOP("Gui::Dialog::DlgSettings3DView", "MSAA 4x"), AntiAliasing::MSAA4x, 4},
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{QT_TRANSLATE_NOOP("Gui::Dialog::DlgSettings3DView", "MSAA 6x"), AntiAliasing::MSAA6x, 6},
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{QT_TRANSLATE_NOOP("Gui::Dialog::DlgSettings3DView", "MSAA 8x"), AntiAliasing::MSAA8x, 8},
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}};
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// clang-format on
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Multisample::Multisample()
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{
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context.setFormat(format);
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context.create();
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offscreen.setFormat(format);
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offscreen.create();
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context.makeCurrent(&offscreen);
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}
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bool Multisample::testSamples(int num) const
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{
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// This is always true
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if (num == 0 || num == 1) {
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return true;
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}
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QOpenGLFramebufferObjectFormat fboFormat;
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fboFormat.setAttachment(QOpenGLFramebufferObject::Depth);
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fboFormat.setSamples(num);
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QOpenGLFramebufferObject fbo(100, 100, fboFormat); // NOLINT
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return fbo.format().samples() == num;
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}
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std::vector<std::pair<QString, AntiAliasing>> Multisample::supported() const
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{
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std::vector<std::pair<QString, AntiAliasing>> modes;
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std::for_each(textMSAA.begin(), textMSAA.end(), [&modes, this](const auto& mode) {
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if (testSamples(std::get<idMSAA>(mode))) {
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const char* context = "Gui::Dialog::DlgSettings3DView";
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QString str = QCoreApplication::translate(context, std::get<idStr>(mode).data());
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modes.emplace_back(str, std::get<idEnum>(mode));
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}
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});
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return modes;
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}
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int Multisample::toSamples(AntiAliasing msaa)
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{
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auto it = std::find_if(textMSAA.begin(), textMSAA.end(), [msaa](const auto& mode) {
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return std::get<idEnum>(mode) == msaa;
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});
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if (it != textMSAA.end()) {
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return std::get<idMSAA>(*it);
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}
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return 0;
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}
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AntiAliasing Multisample::toAntiAliasing(int samples)
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{
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auto it = std::find_if(textMSAA.begin(), textMSAA.end(), [samples](const auto& mode) {
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return std::get<idMSAA>(mode) == samples;
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});
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if (it != textMSAA.end()) {
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return std::get<idEnum>(*it);
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}
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return AntiAliasing::None;
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}
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70
src/Gui/Multisample.h
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70
src/Gui/Multisample.h
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@@ -0,0 +1,70 @@
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// SPDX-License-Identifier: LGPL-2.1-or-later
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/***************************************************************************
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* Copyright (c) 2024 Werner Mayer <wmayer[at]users.sourceforge.net> *
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* *
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* This file is part of FreeCAD. *
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* *
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* FreeCAD is free software: you can redistribute it and/or modify it *
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* under the terms of the GNU Lesser General Public License as *
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* published by the Free Software Foundation, either version 2.1 of the *
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* License, or (at your option) any later version. *
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* *
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* FreeCAD is distributed in the hope that it will be useful, but *
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* WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
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* Lesser General Public License for more details. *
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* *
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* You should have received a copy of the GNU Lesser General Public *
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* License along with FreeCAD. If not, see *
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* <https://www.gnu.org/licenses/>. *
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* *
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**************************************************************************/
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#ifndef GUI_MULTISAMPLE_H
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#define GUI_MULTISAMPLE_H
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#include <map>
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#include <vector>
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#include <FCGlobal.h>
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#include <QOffscreenSurface>
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#include <QOpenGLContext>
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#include <QSurfaceFormat>
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namespace Gui
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{
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/** @name Anti-Aliasing modes of the rendered 3D scene
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* Specifies Anti-Aliasing (AA) method
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* - Smoothing enables OpenGL line and vertex smoothing (basically deprecated)
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* - MSAA is hardware multi sampling (with 2, 4, 6 or 8 passes), a quite common and efficient AA technique
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*/
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//@{
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enum class AntiAliasing {
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None = 0,
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MSAA1x = 1,
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MSAA2x = 2,
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MSAA4x = 3,
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MSAA6x = 5,
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MSAA8x = 4
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};
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//@}
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class GuiExport Multisample
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{
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public:
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Multisample();
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bool testSamples(int num) const;
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std::vector<std::pair<QString, AntiAliasing>> supported() const;
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static int toSamples(AntiAliasing msaa);
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static AntiAliasing toAntiAliasing(int samples);
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private:
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QSurfaceFormat format;
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QOpenGLContext context;
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QOffscreenSurface offscreen;
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};
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} // namespace Gui
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#endif // GUI_MULTISAMPLE_H
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