Disable options when renderer requirements aren't met

src/frontend/qt_sdl/CMakeLists.txt

@@ -31,6 +31,7 @@ set(SOURCES_QT_SDL
     ROMInfoDialog.cpp
     RAMInfoDialog.cpp
     TitleManagerDialog.cpp
+    SupportedRenderers.cpp
     OSD_shaders.h
     font.h
     Platform.cpp

src/frontend/qt_sdl/SupportedRenderers.cpp

@@ -0,0 +1,81 @@
+/*
+    Copyright 2016-2024 melonDS team
+
+    This file is part of melonDS.
+
+    melonDS is free software: you can redistribute it and/or modify it under
+    the terms of the GNU General Public License as published by the Free
+    Software Foundation, either version 3 of the License, or (at your option)
+    any later version.
+
+    melonDS 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 General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with melonDS. If not, see http://www.gnu.org/licenses/.
+*/
+
+#include "types.h"
+#include "Platform.h"
+#include "Config.h"
+#include "GPU.h"
+#include "main.h"
+
+#include "SupportedRenderers.h"
+
+SupportedRenderers* SupportedRenderers::instance = nullptr;
+
+SupportedRenderers::SupportedRenderers(QWidget* parent)
+{
+    if (SupportedRenderers::instance == nullptr)
+        instance = this;
+
+    software = true;
+
+    // OpenGL
+    setSupportedOpenGLRenderers(parent);
+
+    // Future renderers
+}
+
+SupportedRenderers::~SupportedRenderers() {}
+
+void SupportedRenderers::setSupportedOpenGLRenderers(QWidget* parent)
+{
+    ScreenPanelGL *glPanel = new ScreenPanelGL(parent);
+    std::optional<WindowInfo> windowInfo = glPanel->getWindowInfo();
+
+    if (windowInfo.has_value())
+    {
+        std::array<GL::Context::Version, 2> versionsToTry = {
+            GL::Context::Version{GL::Context::Profile::Core, 4, 3},
+            GL::Context::Version{GL::Context::Profile::Core, 3, 2}
+        };
+
+        std::unique_ptr<GL::Context> glContext = GL::Context::Create(*windowInfo, versionsToTry);
+
+        if (glContext)
+        {
+            const char* glVersionStr = reinterpret_cast<const char*>(glGetString(GL_VERSION));
+
+            if (glVersionStr && strlen(glVersionStr) >= 3)
+            {
+                int gl_version = 0;
+
+                // A proper version string or object isn't provided, so we have to parse it ourselves
+                if (isdigit(glVersionStr[0]) && isdigit(glVersionStr[2]))
+                    gl_version = (glVersionStr[0] - '0') * 100 +
+                                 (glVersionStr[2] - '0') * 10;
+
+                // OpenGL 4.3 is required for Compute Shaders while 3.2 is the base requirement
+                if (gl_version >= 430)
+                    computeGl = true;
+                if (gl_version >= 320)
+                    baseGl = true;
+            }
+        }
+    }
+
+    delete glPanel;
+}

src/frontend/qt_sdl/SupportedRenderers.h

@@ -0,0 +1,52 @@
+/*
+    Copyright 2016-2024 melonDS team
+
+    This file is part of melonDS.
+
+    melonDS is free software: you can redistribute it and/or modify it under
+    the terms of the GNU General Public License as published by the Free
+    Software Foundation, either version 3 of the License, or (at your option)
+    any later version.
+
+    melonDS 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 General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with melonDS. If not, see http://www.gnu.org/licenses/.
+*/
+
+#ifndef SUPPORTEDRENDERERS_H
+#define SUPPORTEDRENDERERS_H
+
+using namespace melonDS;
+
+#include "glad/glad.h"
+
+#include <QApplication>
+
+#include "EmuInstance.h"
+
+
+class SupportedRenderers
+{
+public:
+    explicit SupportedRenderers(QWidget* parent);
+    ~SupportedRenderers();
+
+    static SupportedRenderers* instance;
+
+    // Software
+    bool software;
+
+    // OpenGL
+    bool baseGl;
+    bool computeGl;
+
+    // Future renderers
+
+private:
+    void setSupportedOpenGLRenderers(QWidget* parent);
+};
+
+#endif // SUPPORTEDRENDERERS_H

src/frontend/qt_sdl/VideoSettingsDialog.cpp

@@ -24,6 +24,7 @@
 #include "Config.h"
 #include "GPU.h"
 #include "main.h"
+#include "SupportedRenderers.h"
 
 #include "VideoSettingsDialog.h"
 #include "ui_VideoSettingsDialog.h"
@@ -39,11 +40,39 @@ VideoSettingsDialog* VideoSettingsDialog::currentDlg = nullptr;
 
 void VideoSettingsDialog::setEnabled()
 {
+    bool baseGl = SupportedRenderers::instance->baseGl;
+    bool computeGl = SupportedRenderers::instance->computeGl;
+
     auto& cfg = emuInstance->getGlobalConfig();
     int renderer = cfg.GetInt("3D.Renderer");
+    int oglDisplay = cfg.GetBool("Screen.UseGL");
+
+    if (!computeGl)
+    {
+        ui->rb3DCompute->setEnabled(false);
+        if (renderer == renderer3D_OpenGLCompute) // fallback to software renderer
+        {
+            ui->rb3DSoftware->setChecked(true);
+            renderer = renderer3D_Software;
+        }
+    }
 
+    if (!baseGl) // fallback to software renderer
+    {
+        renderer = renderer3D_Software;
+        oglDisplay = false;
+
+        ui->rb3DOpenGL->setEnabled(false);
+        ui->cbGLDisplay->setChecked(false);
+        ui->rb3DSoftware->setChecked(true);
+    }
+
+    cfg.SetInt("3D.Renderer", renderer);
+    cfg.SetBool("Screen.UseGL", oglDisplay);
     bool softwareRenderer = renderer == renderer3D_Software;
-    ui->cbGLDisplay->setEnabled(softwareRenderer);
+
+    ui->cbGLDisplay->setEnabled(softwareRenderer && baseGl);
+    setVsyncControlEnable(oglDisplay || !softwareRenderer);
     ui->cbSoftwareThreaded->setEnabled(softwareRenderer);
     ui->cbxGLResolution->setEnabled(!softwareRenderer);
     ui->cbBetterPolygons->setEnabled(renderer == renderer3D_OpenGL);
@@ -146,6 +175,7 @@ void VideoSettingsDialog::on_VideoSettingsDialog_rejected()
 
 void VideoSettingsDialog::setVsyncControlEnable(bool hasOGL)
 {
+    ui->label_2->setEnabled(hasOGL);
     ui->cbVSync->setEnabled(hasOGL);
     ui->sbVSyncInterval->setEnabled(hasOGL);
 }

src/frontend/qt_sdl/Window.cpp

@@ -83,6 +83,7 @@
 #include "CameraManager.h"
 #include "Window.h"
 #include "AboutDialog.h"
+#include "SupportedRenderers.h"
 
 using namespace melonDS;
 
@@ -693,6 +694,10 @@ MainWindow::MainWindow(int id, EmuInstance* inst, QWidget* parent) :
         // if the window was closed in fullscreen do not restore this
         setWindowState(windowState() & ~Qt::WindowFullScreen);
     }
+
+    if (id == 0 && SupportedRenderers::instance == nullptr)
+        SupportedRenderers* renderers = new SupportedRenderers(this);
+
     show();
 
     panel = nullptr;