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////////////////////////////////////////////////////////////
//
// 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
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