From 31bf0025150d216512248cf119f9167e6c6a69fe Mon Sep 17 00:00:00 2001
From: and3md <and3md@gmail.com>
Date: Sat, 27 Jan 2018 17:17:43 +0100
Subject: [PATCH 1/2] sdlUpdateScreenDPI() should return false when DPI
 override is set.

---
 src/dlangui/platforms/sdl/sdlapp.d | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/src/dlangui/platforms/sdl/sdlapp.d b/src/dlangui/platforms/sdl/sdlapp.d
index 76e4bfa3..c225f94f 100644
--- a/src/dlangui/platforms/sdl/sdlapp.d
+++ b/src/dlangui/platforms/sdl/sdlapp.d
@@ -1593,7 +1593,7 @@ version (Windows) {
     }
 }
 
-/// try to get screen resolution and update SCREEN_DPI; returns true if SCREEN_DPI is changed by this check
+/// try to get screen resolution and update SCREEN_DPI; returns true if SCREEN_DPI is changed (when custom override DPI value is not set) 
 bool sdlUpdateScreenDpi(int displayIndex = 0) {
     if (SDL_GetDisplayDPI is null) {
         Log.w("SDL_GetDisplayDPI is not found: cannot detect screen DPI");
@@ -1608,11 +1608,13 @@ bool sdlUpdateScreenDpi(int displayIndex = 0) {
     int idpi = cast(int)hdpi;
     if (idpi < 32 || idpi > 2000)
         return false;
-    Log.i("sdlUpdateScreenDpi: SCREEN_DPI=", idpi);
-    if (SCREEN_DPI != idpi) {
-        Log.i("sdlUpdateScreenDpi: SCREEN_DPI is changed from ", SCREEN_DPI, " to ", idpi);
+    Log.i("sdlUpdateScreenDpi: systemScreenDPI=", idpi);
+    if (overrideScreenDPI != 0)
+        Log.i("sdlUpdateScreenDpi: systemScreenDPI is overrided = ", overrideScreenDPI);
+    if (systemScreenDPI != idpi) {
+        Log.i("sdlUpdateScreenDpi: systemScreenDPI is changed from ", systemScreenDPI, " to ", idpi);
         SCREEN_DPI = idpi;
-        return true;
+        return (overrideScreenDPI == 0);
     }
     return false;
 }

From aecc6ba7f97db6a7ba951cefd7728d3f6e9ee1c0 Mon Sep 17 00:00:00 2001
From: and3md <and3md@gmail.com>
Date: Sat, 27 Jan 2018 18:13:35 +0100
Subject: [PATCH 2/2] Do not import OpenGL when its disabled.

---
 src/dlangui/platforms/sdl/sdlapp.d | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/dlangui/platforms/sdl/sdlapp.d b/src/dlangui/platforms/sdl/sdlapp.d
index c225f94f..9bac7073 100644
--- a/src/dlangui/platforms/sdl/sdlapp.d
+++ b/src/dlangui/platforms/sdl/sdlapp.d
@@ -40,10 +40,10 @@ import dlangui.widgets.widget;
 import dlangui.platforms.common.platform;
 
 import derelict.sdl2.sdl;
-import derelict.opengl3.gl3;
-import derelict.opengl3.gl;
 
 static if (ENABLE_OPENGL) {
+    import derelict.opengl3.gl3;
+    import derelict.opengl3.gl;
     import dlangui.graphics.gldrawbuf;
     import dlangui.graphics.glsupport;
 }