Added High DPI flag to SDL2 backends

demo/sdl_opengl2/main.c

@@ -67,6 +67,7 @@ main(int argc, char* argv[])
     struct nk_context *ctx;
 
     /* SDL setup */
+    SDL_SetHint(SDL_HINT_VIDEO_HIGHDPI_DISABLED, "0");
     SDL_Init(SDL_INIT_VIDEO);
     SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
     SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 24);
@@ -75,7 +76,7 @@ main(int argc, char* argv[])
     SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 2);
     win = SDL_CreateWindow("Demo",
         SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
-        WINDOW_WIDTH, WINDOW_HEIGHT, SDL_WINDOW_OPENGL|SDL_WINDOW_SHOWN);
+        WINDOW_WIDTH, WINDOW_HEIGHT, SDL_WINDOW_OPENGL|SDL_WINDOW_SHOWN|SDL_WINDOW_ALLOW_HIGHDPI);
     glContext = SDL_GL_CreateContext(win);
     SDL_GetWindowSize(win, &win_width, &win_height);
 

demo/sdl_opengl3/main.c

@@ -68,6 +68,7 @@ main(int argc, char* argv[])
     struct nk_context *ctx;
 
     /* SDL setup */
+    SDL_SetHint(SDL_HINT_VIDEO_HIGHDPI_DISABLED, "0");
     SDL_Init(SDL_INIT_VIDEO|SDL_INIT_TIMER|SDL_INIT_EVENTS);
     SDL_GL_SetAttribute (SDL_GL_CONTEXT_FLAGS, SDL_GL_CONTEXT_FORWARD_COMPATIBLE_FLAG);
     SDL_GL_SetAttribute (SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
@@ -76,7 +77,7 @@ main(int argc, char* argv[])
     SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
     win = SDL_CreateWindow("Demo",
         SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
-        WINDOW_WIDTH, WINDOW_HEIGHT, SDL_WINDOW_OPENGL|SDL_WINDOW_SHOWN);
+        WINDOW_WIDTH, WINDOW_HEIGHT, SDL_WINDOW_OPENGL|SDL_WINDOW_SHOWN|SDL_WINDOW_ALLOW_HIGHDPI);
     glContext = SDL_GL_CreateContext(win);
     SDL_GetWindowSize(win, &win_width, &win_height);
 
@@ -121,7 +122,7 @@ main(int argc, char* argv[])
 
         /* GUI */
         {struct nk_panel layout;
-        if (nk_begin(ctx, &layout, "Demo", nk_rect(50, 50, 210, 250),
+        if (nk_begin(ctx, &layout, "Demo", nk_rect(200, 200, 210, 250),
             NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|NK_WINDOW_SCALABLE|
             NK_WINDOW_MINIMIZABLE|NK_WINDOW_TITLE))
         {