Add manual OpenGL context creation.

For SDL2 set attributes for context version.
For SDL1.2 in X11 create own context.
For SDL1.2 and other platforms not implimented for now.

Also try fallback if need to older context versions.

1 files changed, 17 insertions, 3 deletions

diff --git a/src/render/graphics.cpp b/src/render/graphics.cpp
index 5bb90e753..5cb45e8ca 100644
--- a/src/render/graphics.cpp
+++ b/src/render/graphics.cpp
@@ -71,6 +71,8 @@
 #include "graphicsmanager.h"
 #include "logger.h"
 
+#include "render/mglxinit.h"
+
 #include "resources/imagehelper.h"
 #include "resources/openglimagehelper.h"
 
@@ -99,10 +101,10 @@ Graphics::Graphics() :
     mWindow(nullptr),
 #ifdef USE_SDL2
     mRenderer(nullptr),
+#endif
 #ifdef USE_OPENGL
     mGLContext(nullptr),
 #endif
-#endif
     mBpp(0),
     mAlpha(false),
     mFullscreen(false),
@@ -252,11 +254,15 @@ bool Graphics::setOpenGLMode()
         mActualWidth, mActualHeight,
         mBpp, getOpenGLFlags())))
     {
+        logger->log("Window/context creation failed");
         mRect.w = 0;
         mRect.h = 0;
         return false;
     }
 
+#if defined(USE_OPENGL) && defined(USE_X11)
+    Glx::initFunctions();
+#endif
 #ifdef USE_SDL2
     int w1 = 0;
     int h1 = 0;
@@ -264,10 +270,10 @@ bool Graphics::setOpenGLMode()
     mRect.w = static_cast<int32_t>(w1 / mScale);
     mRect.h = static_cast<int32_t>(h1 / mScale);
 
-    mGLContext = SDL_GL_CreateContext(mWindow);
-
+    createGLContext();
 #else  // USE_SDL2
 
+    createGLContext();
     mRect.w = static_cast<uint16_t>(mWindow->w / mScale);
     mRect.h = static_cast<uint16_t>(mWindow->h / mScale);
 
@@ -353,6 +359,14 @@ int Graphics::getSoftwareFlags() const
     return displayFlags;
 }
 
+#ifdef USE_OPENGL
+void Graphics::createGLContext()
+{
+#ifdef USE_SDL2
+    mGLContext = SDL_GL_CreateContext(mWindow);
+#endif
+}
+#endif
 
 void Graphics::updateMemoryInfo()
 {