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Expose display device DPI

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This commit is contained in:
Lars Doucet
2016-01-12 09:15:28 -06:00
parent c626ca1ff8
commit b240ff08e8
5 changed files with 48 additions and 0 deletions
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5
lime/system/Display.hx
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@@ -19,6 +19,11 @@ class Display {
public var id (default, null):Int;
/**
* Pixel density of the display
*/
public var dpi (default, null): { diagonal:Float, horizontal:Float, vertical:Float };
/**
* The name of the device, such as "Samsung SyncMaster P2350", "iPhone 6", "Occulus Rift DK2", etc.
**/

14
lime/system/System.hx
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@@ -163,6 +163,19 @@ class System {
}
display.currentMode = display.supportedModes[displayInfo.currentMode];
var dpi:Dynamic = lime_system_get_display_dpi (id);
if (dpi != null) {
display.dpi = { vertical:0, horizontal:0, diagonal:0 };
display.dpi.vertical = dpi.vertical;
display.dpi.horizontal = dpi.horizontal;
display.dpi.diagonal = dpi.diagonal;
}
return display;
}
@@ -421,6 +434,7 @@ class System {
@:cffi private static function lime_system_set_allow_screen_timeout (value:Bool):Bool;
@:cffi private static function lime_system_get_directory (type:Int, company:String, title:String):Dynamic;
@:cffi private static function lime_system_get_display (index:Int):Dynamic;
@:cffi private static function lime_system_get_display_dpi (index:Int):Dynamic;
@:cffi private static function lime_system_get_num_displays ():Int;
@:cffi private static function lime_system_get_timer ():Float;
#end

1
project/include/system/System.h
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@@ -28,6 +28,7 @@ namespace lime {
static bool GetAllowScreenTimeout ();
static const char* GetDirectory (SystemDirectory type, const char* company, const char* title);
static value GetDisplay (int id);
static value GetDisplayDPI (int id);
static int GetNumDisplays ();
static double GetTimer ();
static bool SetAllowScreenTimeout (bool allow);

7
project/src/ExternalInterface.cpp
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@@ -1160,6 +1160,12 @@ namespace lime {
}
value lime_system_get_display_dpi (int id) {
return System::GetDisplayDPI (id);
}
int lime_system_get_num_displays () {
return System::GetNumDisplays ();
@@ -1512,6 +1518,7 @@ namespace lime {
DEFINE_PRIME0 (lime_system_get_allow_screen_timeout);
DEFINE_PRIME3 (lime_system_get_directory);
DEFINE_PRIME1 (lime_system_get_display);
DEFINE_PRIME1 (lime_system_get_display_dpi);
DEFINE_PRIME0 (lime_system_get_num_displays);
DEFINE_PRIME0 (lime_system_get_timer);
DEFINE_PRIME1 (lime_system_set_allow_screen_timeout);

21
project/src/backend/sdl/SDLSystem.cpp
View File

@@ -304,6 +304,27 @@ namespace lime {
}
value System::GetDisplayDPI (int id) {
value dpi = alloc_empty_object ();
int id_diagonal = val_id ("diagonal");
int id_horizontal = val_id ("horizontal");
int id_vertical = val_id ("vertical");
float ddpi = 0.0;
float hdpi = 0.0;
float vdpi = 0.0;
SDL_GetDisplayDPI (id, &ddpi, &hdpi, &vdpi);
alloc_field (dpi, id_diagonal , alloc_float (ddpi));
alloc_field (dpi, id_horizontal, alloc_float (hdpi));
alloc_field (dpi, id_vertical , alloc_float (vdpi));
return dpi;
}
int System::GetNumDisplays () {