Add option for create custom OpenGL context.

By default this option disabled, because may create issues.

9 files changed, 26 insertions, 14 deletions

diff --git a/src/defaults.cpp b/src/defaults.cpp
index 2a6d96cb5..bd4ea9224 100644
--- a/src/defaults.cpp
+++ b/src/defaults.cpp
@@ -387,6 +387,7 @@ DefaultsData* getConfigDefaults()
     AddDEF("enableTradeFilter", true);
     AddDEF("enableIdCollecting", false);
     AddDEF("checkOpenGLVersion", true);
+    AddDEF("openglContext", false);
     return configData;
 }
 
diff --git a/src/graphicsmanager.cpp b/src/graphicsmanager.cpp
index 4b0bae9a5..28a7bd9fa 100644
--- a/src/graphicsmanager.cpp
+++ b/src/graphicsmanager.cpp
@@ -184,7 +184,7 @@ int GraphicsManager::detectGraphics()
     SDL_Window *const window = createWindow(100, 100, 0,
         SDL_ANYFORMAT | SDL_OPENGL);
     mainGraphics->setWindow(window, 100, 100);
-    mainGraphics->createGLContext();
+    mainGraphics->createGLContext(false);
 
     initOpenGL();
     logVersion();
diff --git a/src/gui/widgets/tabs/setup_perfomance.cpp b/src/gui/widgets/tabs/setup_perfomance.cpp
index c62346f8f..25f25a4c7 100644
--- a/src/gui/widgets/tabs/setup_perfomance.cpp
+++ b/src/gui/widgets/tabs/setup_perfomance.cpp
@@ -92,6 +92,10 @@ Setup_Perfomance::Setup_Perfomance(const Widget2 *const widget) :
     new SetupItemCheckBox(_("Enable texture sampler (OpenGL)"), "",
         "useTextureSampler", this, "useTextureSamplerEvent");
 
+    // TRANSLATORS: settings option
+    new SetupItemCheckBox(_("Enable OpenGL context creation"),
+        "", "openglContext", this, "openglContextEvent");
+
 
     // TRANSLATORS: settings option
     new SetupItemLabel(_("Better quality (disable for better performance)"),
diff --git a/src/render/graphics.cpp b/src/render/graphics.cpp
index bc08ecfd3..59524d300 100644
--- a/src/render/graphics.cpp
+++ b/src/render/graphics.cpp
@@ -288,10 +288,10 @@ bool Graphics::setOpenGLMode() restrict2
     mRect.w = CAST_S32(w1 / mScale);
     mRect.h = CAST_S32(h1 / mScale);
 
-    createGLContext();
+    createGLContext(config.getBoolValue("openglContext"));
 #else  // USE_SDL2
 
-    createGLContext();
+    createGLContext(config.getBoolValue("openglContext"));
     mRect.w = CAST_U16(mWindow->w / mScale);
     mRect.h = CAST_U16(mWindow->h / mScale);
 
@@ -389,7 +389,7 @@ int Graphics::getSoftwareFlags() const restrict2
 }
 
 #ifdef USE_OPENGL
-void Graphics::createGLContext() restrict2
+void Graphics::createGLContext(const bool custom A_UNUSED) restrict2
 {
 #ifdef USE_SDL2
     mGLContext = SDL_GL_CreateContext(mWindow);
diff --git a/src/render/graphics.h b/src/render/graphics.h
index 016f2c4ab..997ed2196 100644
--- a/src/render/graphics.h
+++ b/src/render/graphics.h
@@ -404,9 +404,9 @@ class Graphics notfinal
 
 #ifdef USE_OPENGL
 #ifdef USE_SDL2
-        virtual void createGLContext() restrict2;
+        virtual void createGLContext(const bool custom) restrict2;
 #else
-        virtual void createGLContext() restrict2 A_CONST;
+        virtual void createGLContext(const bool custom) restrict2 A_CONST;
 #endif
 #endif
 
diff --git a/src/render/mobileopengl2graphics.cpp b/src/render/mobileopengl2graphics.cpp
index 163185bb6..576bc67ab 100644
--- a/src/render/mobileopengl2graphics.cpp
+++ b/src/render/mobileopengl2graphics.cpp
@@ -1227,9 +1227,9 @@ void MobileOpenGL2Graphics::clearScreen() const restrict2
         GL_STENCIL_BUFFER_BIT);
 }
 
-void MobileOpenGL2Graphics::createGLContext() restrict2
+void MobileOpenGL2Graphics::createGLContext(const bool custom) restrict2
 {
-    Graphics::createGLContext();
+    Graphics::createGLContext(custom);
 /*
     if (mGLContext)
         SDL::makeCurrentContext(mGLContext);
diff --git a/src/render/mobileopengl2graphics.h b/src/render/mobileopengl2graphics.h
index 9b171becb..2efa367c4 100644
--- a/src/render/mobileopengl2graphics.h
+++ b/src/render/mobileopengl2graphics.h
@@ -77,7 +77,7 @@ class MobileOpenGL2Graphics final : public Graphics
                          uint32_t *restrict const arr)
                          restrict2 override final A_NONNULL(3);
 
-        void createGLContext() restrict2 override final;
+        void createGLContext(const bool custom) restrict2 override final;
 
         #include "render/graphicsdef.hpp"
         RENDER_GRAPHICSDEF_HPP
diff --git a/src/render/modernopenglgraphics.cpp b/src/render/modernopenglgraphics.cpp
index 458a9a9f7..1629dbea5 100644
--- a/src/render/modernopenglgraphics.cpp
+++ b/src/render/modernopenglgraphics.cpp
@@ -1221,12 +1221,19 @@ void ModernOpenGLGraphics::clearScreen() const restrict2
         GL_STENCIL_BUFFER_BIT);
 }
 
-void ModernOpenGLGraphics::createGLContext() restrict2
+void ModernOpenGLGraphics::createGLContext(const bool custom) restrict2
 {
-    if (mGLContext)
-        SDL::makeCurrentContext(mGLContext);
+    if (custom)
+    {
+        if (mGLContext)
+            SDL::makeCurrentContext(mGLContext);
+        else
+            mGLContext = SDL::createGLContext(mWindow, 3, 3, 0x01);
+    }
     else
-        mGLContext = SDL::createGLContext(mWindow, 3, 3, 0x01);
+    {
+        Graphics::createGLContext(false);
+    }
 }
 
 void ModernOpenGLGraphics::finalize(ImageCollection *restrict const col)
diff --git a/src/render/modernopenglgraphics.h b/src/render/modernopenglgraphics.h
index f7eecd0c4..53d6966c2 100644
--- a/src/render/modernopenglgraphics.h
+++ b/src/render/modernopenglgraphics.h
@@ -77,7 +77,7 @@ class ModernOpenGLGraphics final : public Graphics
                          uint32_t *restrict const arr)
                          restrict2 override final A_NONNULL(3);
 
-        void createGLContext() restrict2 override final;
+        void createGLContext(const bool custom) restrict2 override final;
 
         #include "render/graphicsdef.hpp"
         RENDER_GRAPHICSDEF_HPP