summaryrefslogtreecommitdiff
path: root/src/SFML/Window/OSX/cg_sf_conversion.mm
diff options
context:
space:
mode:
Diffstat (limited to 'src/SFML/Window/OSX/cg_sf_conversion.mm')
-rw-r--r--src/SFML/Window/OSX/cg_sf_conversion.mm97
1 files changed, 97 insertions, 0 deletions
diff --git a/src/SFML/Window/OSX/cg_sf_conversion.mm b/src/SFML/Window/OSX/cg_sf_conversion.mm
new file mode 100644
index 0000000..32495c3
--- /dev/null
+++ b/src/SFML/Window/OSX/cg_sf_conversion.mm
@@ -0,0 +1,97 @@
+////////////////////////////////////////////////////////////
+//
+// SFML - Simple and Fast Multimedia Library
+// Copyright (C) 2007-2016 Marco Antognini (antognini.marco@gmail.com),
+// Laurent Gomila (laurent@sfml-dev.org)
+//
+// This software is provided 'as-is', without any express or implied warranty.
+// In no event will the authors be held liable for any damages arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it freely,
+// subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented;
+// you must not claim that you wrote the original software.
+// If you use this software in a product, an acknowledgment
+// in the product documentation would be appreciated but is not required.
+//
+// 2. Altered source versions must be plainly marked as such,
+// and must not be misrepresented as being the original software.
+//
+// 3. This notice may not be removed or altered from any source distribution.
+//
+////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////
+// Headers
+////////////////////////////////////////////////////////////
+#include <SFML/Window/OSX/cg_sf_conversion.hpp>
+#include <SFML/System/Err.hpp>
+
+#import <SFML/Window/OSX/Scaling.h>
+
+namespace sf
+{
+namespace priv
+{
+
+////////////////////////////////////////////////////////////
+size_t modeBitsPerPixel(CGDisplayModeRef mode)
+{
+ size_t bpp = 0; // no match
+
+ // Compare encoding.
+ CFStringRef pixEnc = CGDisplayModeCopyPixelEncoding(mode);
+ if(CFStringCompare(pixEnc, CFSTR(IO32BitDirectPixels), kCFCompareCaseInsensitive) == kCFCompareEqualTo)
+ bpp = 32;
+ else if(CFStringCompare(pixEnc, CFSTR(IO16BitDirectPixels), kCFCompareCaseInsensitive) == kCFCompareEqualTo)
+ bpp = 16;
+ else if(CFStringCompare(pixEnc, CFSTR(IO8BitIndexedPixels), kCFCompareCaseInsensitive) == kCFCompareEqualTo)
+ bpp = 8;
+
+ // Clean up memory.
+ CFRelease(pixEnc);
+
+ return bpp;
+}
+
+
+////////////////////////////////////////////////////////////
+size_t displayBitsPerPixel(CGDirectDisplayID displayId)
+{
+ // Get the display mode.
+ CGDisplayModeRef mode = CGDisplayCopyDisplayMode(displayId);
+
+ // Get bpp for the mode.
+ const size_t bpp = modeBitsPerPixel(mode);
+
+ // Clean up Memory.
+ CGDisplayModeRelease(mode);
+
+ return bpp;
+}
+
+
+////////////////////////////////////////////////////////////
+VideoMode convertCGModeToSFMode(CGDisplayModeRef cgmode)
+{
+ // The main documentation says the sizes returned by
+ // CGDisplayModeGetWidth and CGDisplayModeGetHeight
+ // are expressed in pixels. However, some additional
+ // documentation [1] states they actually return
+ // values in points starting with 10.8.
+ //
+ // We therefore needs to use the scaling factor to
+ // convert the dimensions properly.
+ //
+ // [1]: "APIs for Supporting High Resolution" > "Additions and Changes for OS X v10.8"
+ // https://developer.apple.com/library/mac/documentation/GraphicsAnimation/Conceptual/HighResolutionOSX/APIs/APIs.html#//apple_ref/doc/uid/TP40012302-CH5-SW27
+ VideoMode mode(CGDisplayModeGetWidth(cgmode), CGDisplayModeGetHeight(cgmode), modeBitsPerPixel(cgmode));
+ scaleOutWidthHeight(mode, nil);
+ return mode;
+}
+
+} // namespace priv
+} // namespace sf
+