fix SDL1 build

[d2df-sdl.git] / src / game / sdl / g_system.pas

diff --git a/src/game/sdl/g_system.pas b/src/game/sdl/g_system.pas
index e5f62750ea6b0ca2c993025d4f7ab23125eb1d35..7593b02398811605b2981aed31267e8760e8a20c 100644 (file)
--- a/src/game/sdl/g_system.pas
+++ b/src/game/sdl/g_system.pas
@@ -70,6 +70,28 @@ implementation
 
   (* --------- Graphics --------- *)
 
+  function LoadGL: Boolean;
+  begin
+    result := true;
+    {$IFDEF NOGL_INIT}
+    nogl_Init;
+    if glRenderToFBO and (not nogl_ExtensionSupported('GL_OES_framebuffer_object')) then
+    {$ELSE}
+    if glRenderToFBO and (not Load_GL_ARB_framebuffer_object) then
+    {$ENDIF}
+    begin
+      e_LogWriteln('GL: framebuffer objects not supported; disabling FBO rendering');
+      glRenderToFBO := false;
+    end;
+  end;
+
+  procedure FreeGL;
+  begin
+    {$IFDEF NOGL_INIT}
+    nogl_Quit();
+    {$ENDIF}
+  end;
+
   procedure UpdateSize (w, h: Integer);
   begin
     gWinSizeX := w;
@@ -125,18 +147,11 @@ implementation
       screen := SDL_SetVideoMode(w, h, bpp, flags);
       if screen <> nil then
       begin
-        {$IFDEF NOGL_INIT}
-          nogl_Init;
-          glRenderToFBO := False; // TODO: check for GL_OES_framebuffer_object
-        {$ELSE}
-          if glRenderToFBO then
-            if not Load_GL_ARB_framebuffer_object() then
-              if not Load_GL_EXT_framebuffer_object() then
-              begin
-                e_LogWriteln('SDL: no framebuffer support detected');
-                glRenderToFBO := False
-              end;
-        {$ENDIF}
+        if not LoadGL then
+        begin
+          e_LogWriteln('GL: unable to load OpenGL functions', TMsgType.Fatal);
+          exit;
+        end;
         SDL_WM_SetCaption(GetTitle(), nil);
         gFullScreen := fullscreen;
         gRC_FullScreen := fullscreen;
@@ -499,9 +514,7 @@ implementation
       RemoveJoystick(i);
     if screen <> nil then
     begin
-      {$IFDEF NOGL_INIT}
-        nogl_Quit;
-      {$ENDIF}
+      FreeGL;
       SDL_FreeSurface(screen)
     end;
     SDL_Quit