From a771b60af6ca1e5ade61d92357babdbcbb7a85bf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20Vondru=C5=A1?= <mosra@centrum.cz>
Date: Thu, 11 Feb 2016 11:43:15 +0100
Subject: [PATCH] Platform: use zero window size on iOS and let SDL2
 autodetect.

Hopefully this feature won't go away in some future version.
---
 src/Magnum/Platform/Sdl2Application.cpp | 7 ++++++-
 src/Magnum/Platform/Sdl2Application.h   | 5 ++++-
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/src/Magnum/Platform/Sdl2Application.cpp b/src/Magnum/Platform/Sdl2Application.cpp
index 37310ad73..37e0c3b20 100644
--- a/src/Magnum/Platform/Sdl2Application.cpp
+++ b/src/Magnum/Platform/Sdl2Application.cpp
@@ -439,7 +439,12 @@ Sdl2Application::Configuration::Configuration():
     #if !defined(CORRADE_TARGET_EMSCRIPTEN) && !defined(CORRADE_TARGET_IOS)
     _title("Magnum SDL2 Application"),
     #endif
-    _size(800, 600), _windowFlags{}, _sampleCount(0)
+    #ifndef CORRADE_TARGET_IOS
+    _size{800, 600},
+    #else
+    _size{}, /* SDL2 detects someting for us */
+    #endif
+    _windowFlags{}, _sampleCount(0)
     #ifndef CORRADE_TARGET_EMSCRIPTEN
     , _version(Version::None), _sRGBCapable{false}
     #endif
diff --git a/src/Magnum/Platform/Sdl2Application.h b/src/Magnum/Platform/Sdl2Application.h
index fefecd3ae..690041b1c 100644
--- a/src/Magnum/Platform/Sdl2Application.h
+++ b/src/Magnum/Platform/Sdl2Application.h
@@ -653,7 +653,10 @@ class Sdl2Application::Configuration {
          * @brief Set window size
          * @return Reference to self (for method chaining)
          *
-         * Default is `{800, 600}`.
+         * Default is `{800, 600}`. On iOS it defaults to a "reasonable" size
+         * based on whether HiDPI support is enabled using
+         * @ref WindowFlag::AllowHighDpi, but not necessarily native display
+         * resolution (you have to set it explicitly).
          */
         Configuration& setSize(const Vector2i& size) {
             _size = size;