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DavidWyand-GG 2012-09-19 11:15:01 -04:00
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Engine/source/platformMac/macGLUtils.h Normal file
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//-----------------------------------------------------------------------------
// Copyright (c) 2012 GarageGames, LLC
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
//-----------------------------------------------------------------------------
#ifndef _MACGLUTILS_H_
#define _MACGLUTILS_H_
static Vector<NSOpenGLPixelFormatAttribute> _beginPixelFormatAttributesForDisplay(CGDirectDisplayID display)
{
Vector<NSOpenGLPixelFormatAttribute> attributes;
attributes.reserve(16); // Most attribute lists won't exceed this
attributes.push_back(NSOpenGLPFAScreenMask);
attributes.push_back((NSOpenGLPixelFormatAttribute)CGDisplayIDToOpenGLDisplayMask(display));
attributes.push_back(NSOpenGLPFANoRecovery);
attributes.push_back(NSOpenGLPFADoubleBuffer);
attributes.push_back(NSOpenGLPFAAccelerated);
attributes.push_back(NSOpenGLPFAAuxBuffers);
attributes.push_back((NSOpenGLPixelFormatAttribute)1);
return attributes;
}
static void _addColorAlphaDepthStencilAttributes(Vector<NSOpenGLPixelFormatAttribute>& attributes, U32 color, U32 alpha, U32 depth, U32 stencil)
{
attributes.push_back(NSOpenGLPFAColorSize); attributes.push_back((NSOpenGLPixelFormatAttribute)color);
attributes.push_back(NSOpenGLPFAAlphaSize); attributes.push_back((NSOpenGLPixelFormatAttribute)alpha);
attributes.push_back(NSOpenGLPFADepthSize); attributes.push_back((NSOpenGLPixelFormatAttribute)depth);
attributes.push_back(NSOpenGLPFAStencilSize); attributes.push_back((NSOpenGLPixelFormatAttribute)stencil);
}
static void _addFullscreenAttributes(Vector<NSOpenGLPixelFormatAttribute>& attributes)
{
attributes.push_back(NSOpenGLPFAFullScreen);
}
static void _endAttributeList(Vector<NSOpenGLPixelFormatAttribute>& attributes)
{
attributes.push_back((NSOpenGLPixelFormatAttribute)0);
}
static Vector<NSOpenGLPixelFormatAttribute> _createStandardPixelFormatAttributesForDisplay(CGDirectDisplayID display)
{
Vector<NSOpenGLPixelFormatAttribute> attributes = _beginPixelFormatAttributesForDisplay(display);
_addColorAlphaDepthStencilAttributes(attributes, 24, 8, 24, 8);
_endAttributeList(attributes);
return attributes;
}
/// returns an opengl pixel format suitable for creating shared opengl contexts.
static NSOpenGLPixelFormat* _createStandardPixelFormat()
{
Vector<NSOpenGLPixelFormatAttribute> attributes = _createStandardPixelFormatAttributesForDisplay(kCGDirectMainDisplay);
NSOpenGLPixelFormat* fmt = [[NSOpenGLPixelFormat alloc] initWithAttributes:attributes.address()];
return fmt;
}
#endif