* SDL_IOS_IDLE_TIMER_DISABLED hint

VisualC/SDL/SDL_VS2005.vcproj

@@ -907,6 +907,10 @@
 			RelativePath="..\..\src\SDL_hints.c"
 			>
 		</File>
+		<File
+			RelativePath="..\..\src\SDL_hints_c.h"
+			>
+		</File>
 		<File
 			RelativePath="..\..\src\stdlib\SDL_iconv.c"
 			>

VisualC/SDL/SDL_VS2008.vcproj

@@ -896,6 +896,10 @@
 			RelativePath="..\..\src\SDL_hints.c"
 			>
 		</File>
+		<File
+			RelativePath="..\..\src\SDL_hints_c.h"
+			>
+		</File>
 		<File
 			RelativePath="..\..\src\stdlib\SDL_iconv.c"
 			>

VisualC/SDL/SDL_VS2010.vcxproj

@@ -281,6 +281,7 @@
     <ClInclude Include="..\..\src\audio\dummy\SDL_dummyaudio.h" />
     <ClInclude Include="..\..\src\audio\windx5\SDL_dx5audio.h" />
     <ClInclude Include="..\..\src\SDL_error_c.h" />
+    <ClInclude Include="..\..\src\SDL_hints_c.h" />
     <ClInclude Include="..\..\src\events\SDL_events_c.h" />
     <ClInclude Include="..\..\src\SDL_fatal.h" />
     <ClInclude Include="..\..\src\video\SDL_glesfuncs.h" />
@@ -436,4 +437,4 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-</Project>
+</Project>

Xcode-iPhoneOS/SDL/SDLiPhoneOS.xcodeproj/project.pbxproj

@@ -122,6 +122,7 @@
 		04FFAB8C12E23B8D00BA343D /* SDL_spinlock.c in Sources */ = {isa = PBXBuildFile; fileRef = 04FFAB8A12E23B8D00BA343D /* SDL_spinlock.c */; };
 		04FFAB9612E23BDC00BA343D /* SDL_blendmode.h in Headers */ = {isa = PBXBuildFile; fileRef = 04FFAB9312E23BDC00BA343D /* SDL_blendmode.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		04FFAB9812E23BDC00BA343D /* SDL_shape.h in Headers */ = {isa = PBXBuildFile; fileRef = 04FFAB9512E23BDC00BA343D /* SDL_shape.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		22C905CD13A22646003FE4E4 /* SDL_hints_c.h in Headers */ = {isa = PBXBuildFile; fileRef = 22C905CC13A22646003FE4E4 /* SDL_hints_c.h */; };
 		56ED04E1118A8EE200A56AA6 /* SDL_power.c in Sources */ = {isa = PBXBuildFile; fileRef = 56ED04E0118A8EE200A56AA6 /* SDL_power.c */; };
 		56ED04E3118A8EFD00A56AA6 /* SDL_syspower.m in Sources */ = {isa = PBXBuildFile; fileRef = 56ED04E2118A8EFD00A56AA6 /* SDL_syspower.m */; };
 		FD24846D0E5655AE0021E198 /* SDL_uikitkeyboard.h in Headers */ = {isa = PBXBuildFile; fileRef = FD24846B0E5655AE0021E198 /* SDL_uikitkeyboard.h */; };
@@ -376,6 +377,7 @@
 		04FFAB8A12E23B8D00BA343D /* SDL_spinlock.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = SDL_spinlock.c; sourceTree = "<group>"; };
 		04FFAB9312E23BDC00BA343D /* SDL_blendmode.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = SDL_blendmode.h; path = ../../include/SDL_blendmode.h; sourceTree = SOURCE_ROOT; };
 		04FFAB9512E23BDC00BA343D /* SDL_shape.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = SDL_shape.h; path = ../../include/SDL_shape.h; sourceTree = SOURCE_ROOT; };
+		22C905CC13A22646003FE4E4 /* SDL_hints_c.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = SDL_hints_c.h; path = ../../src/SDL_hints_c.h; sourceTree = "<group>"; };
 		56ED04E0118A8EE200A56AA6 /* SDL_power.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; name = SDL_power.c; path = ../../src/power/SDL_power.c; sourceTree = SOURCE_ROOT; };
 		56ED04E2118A8EFD00A56AA6 /* SDL_syspower.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = SDL_syspower.m; path = ../../src/power/uikit/SDL_syspower.m; sourceTree = SOURCE_ROOT; };
 		FD0BBFEF0E3933DD00D833B1 /* SDL_uikitview.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = SDL_uikitview.h; sourceTree = "<group>"; };
@@ -971,6 +973,7 @@
 				FD99B9D60DD52EDC00FB1D6B /* SDL_fatal.c */,
 				FD99B9D70DD52EDC00FB1D6B /* SDL_fatal.h */,
 				0442EC5412FE1C3F004C9285 /* SDL_hints.c */,
+				22C905CC13A22646003FE4E4 /* SDL_hints_c.h */,
 				04BAC09B1300C1290055DE28 /* SDL_log.c */,
 				FD99B9D80DD52EDC00FB1D6B /* SDL.c */,
 			);
@@ -1241,6 +1244,7 @@
 				04BAC0991300C0F70055DE28 /* SDL_log.h in Headers */,
 				04BAC09C1300C1290055DE28 /* SDL_assert_c.h in Headers */,
 				0417A516130C988500578583 /* SDL_keycode.h in Headers */,
+				22C905CD13A22646003FE4E4 /* SDL_hints_c.h in Headers */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};

include/SDL_hints.h

@@ -119,6 +119,20 @@ extern "C" {
  */
 #define SDL_HINT_RENDER_VSYNC               "SDL_RENDER_VSYNC"
 
+/**
+ *  \brief  A variable controlling whether the idle timer is disabled on iOS.
+ *
+ *  When an iOS app does not receive touches for some time, the screen is
+ *  dimmed automatically. For games where the accelerometer is the only input
+ *  this is problematic. This functionality can be disabled by setting this
+ *  hint.
+ *
+ *  This variable can be set to the following values:
+ *    "0"       - Enable idle timer
+ *    "1"       - Disable idle timer
+ */
+#define SDL_HINT_IDLE_TIMER_DISABLED "SDL_IOS_IDLE_TIMER_DISABLED"
+
 /**
  *  \brief  A variable controlling which orientations are allowed on iOS.
  *

src/SDL_hints.c

@@ -21,6 +21,7 @@
 #include "SDL_config.h"
 
 #include "SDL_hints.h"
+#include "SDL_hints_c.h"
 
 
 /* Assuming there aren't many hints set and they aren't being queried in
@@ -30,11 +31,26 @@ typedef struct SDL_Hint {
     char *name;
     char *value;
     SDL_HintPriority priority;
+    SDL_HintChangedCb callback;
     struct SDL_Hint *next;
 } SDL_Hint;
 
 static SDL_Hint *SDL_hints;
 
+SDL_bool
+SDL_RegisterHintChangedCb(const char *name, SDL_HintChangedCb hintCb)
+{
+    SDL_Hint *hint;
+
+    for (hint = SDL_hints; hint; hint = hint->next) {
+        if (SDL_strcmp(name, hint->name) == 0) {
+            hint->callback = hintCb;
+            return SDL_TRUE;
+        }
+    }
+
+    return SDL_FALSE;
+}
 
 SDL_bool
 SDL_SetHintWithPriority(const char *name, const char *value,
@@ -59,6 +75,9 @@ SDL_SetHintWithPriority(const char *name, const char *value,
                 return SDL_FALSE;
             }
             if (SDL_strcmp(hint->value, value) != 0) {
+                if (hint->callback != NULL) {
+                    (*hint->callback)(name, hint->value, value);
+                }
                 SDL_free(hint->value);
                 hint->value = SDL_strdup(value);
             }
@@ -75,6 +94,7 @@ SDL_SetHintWithPriority(const char *name, const char *value,
     hint->name = SDL_strdup(name);
     hint->value = SDL_strdup(value);
     hint->priority = priority;
+    hint->callback = NULL;
     hint->next = SDL_hints;
     SDL_hints = hint;
     return SDL_TRUE;

src/video/uikit/SDL_uikitappdelegate.m

@@ -20,6 +20,9 @@
 */
 
 #import "../SDL_sysvideo.h"
+#import "SDL_assert.h"
+#import "SDL_hints.h"
+#import "../../SDL_hints_c.h"
 
 #import "SDL_uikitappdelegate.h"
 #import "SDL_uikitopenglview.h"
@@ -55,6 +58,13 @@ int main(int argc, char **argv) {
     return 0;
 }
 
+static void SDL_IdleTimerDisabledChanged(const char *name, const char *oldValue, const char *newValue) {
+    SDL_assert(SDL_strcmp(name, SDL_HINT_IDLE_TIMER_DISABLED) == 0);
+
+    BOOL disable = (*newValue != '0');
+    [UIApplication sharedApplication].idleTimerDisabled = disable;
+}
+
 @implementation SDLUIKitDelegate
 
 /* convenience method */
@@ -75,6 +85,10 @@ - (id)init {
 }
 
 - (void)postFinishLaunch {
+
+    /* register a callback for the idletimer hint */
+    SDL_SetHint(SDL_HINT_IDLE_TIMER_DISABLED, "0");
+    SDL_RegisterHintChangedCb(SDL_HINT_IDLE_TIMER_DISABLED, &SDL_IdleTimerDisabledChanged);
 
     /* run the user's application, passing argc and argv */
     int exit_status = SDL_main(forward_argc, forward_argv);