mirror of
https://github.com/glfw/glfw.git
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130 lines
4.4 KiB
C
130 lines
4.4 KiB
C
//========================================================================
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// GLFW - An OpenGL framework
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// Platform: Carbon/AGL/CGL
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// API Version: 3.0
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// WWW: http://www.glfw.org/
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//------------------------------------------------------------------------
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// Copyright (c) 2002-2006 Marcus Geelnard
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// Copyright (c) 2003 Keith Bauer
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// Copyright (c) 2003-2010 Camilla Berglund <elmindreda@elmindreda.org>
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//
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// This software is provided 'as-is', without any express or implied
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// warranty. In no event will the authors be held liable for any damages
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// arising from the use of this software.
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//
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// Permission is granted to anyone to use this software for any purpose,
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// including commercial applications, and to alter it and redistribute it
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// freely, subject to the following restrictions:
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//
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// 1. The origin of this software must not be misrepresented; you must not
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// claim that you wrote the original software. If you use this software
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// in a product, an acknowledgment in the product documentation would
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// be appreciated but is not required.
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//
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// 2. Altered source versions must be plainly marked as such, and must not
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// be misrepresented as being the original software.
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//
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// 3. This notice may not be removed or altered from any source
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// distribution.
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//
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//========================================================================
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#include "internal.h"
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//========================================================================
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// Compares two video modes
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//========================================================================
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static int _glfwVideoModesEqual( GLFWvidmode* first,
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GLFWvidmode* second )
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{
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if( first->width != second->width )
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return 0;
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if( first->height != second->height )
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return 0;
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if( first->redBits + first->greenBits + first->blueBits !=
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second->redBits + second->greenBits + second->blueBits )
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return 0;
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return 1;
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}
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//========================================================================
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// Converts a CG mode to a GLFW mode
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//========================================================================
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static void _glfwCGToGLFWVideoMode( CFDictionaryRef cgMode,
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GLFWvidmode* glfwMode )
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{
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int bitsPerSample;
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CFNumberGetValue( CFDictionaryGetValue( cgMode, kCGDisplayWidth ),
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kCFNumberIntType,
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&(glfwMode->width) );
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CFNumberGetValue( CFDictionaryGetValue( cgMode, kCGDisplayHeight ),
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kCFNumberIntType,
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&(glfwMode->height) );
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CFNumberGetValue( CFDictionaryGetValue( cgMode, kCGDisplayBitsPerSample ),
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kCFNumberIntType,
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&bitsPerSample );
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glfwMode->redBits = bitsPerSample;
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glfwMode->greenBits = bitsPerSample;
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glfwMode->blueBits = bitsPerSample;
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}
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//========================================================================
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// Get a list of available video modes
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//========================================================================
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int _glfwPlatformGetVideoModes( GLFWvidmode *list, int maxcount )
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{
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int i, j, maxModes, numModes;
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GLFWvidmode mode;
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CFArrayRef availableModes = CGDisplayAvailableModes( kCGDirectMainDisplay );
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CFIndex numberOfAvailableModes = CFArrayGetCount( availableModes );
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numModes = 0;
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maxModes = ( numberOfAvailableModes < maxcount ?
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numberOfAvailableModes :
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maxcount );
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for( i = 0; i < maxModes; ++i )
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{
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_glfwCGToGLFWVideoMode( CFArrayGetValueAtIndex( availableModes, i ),
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&mode );
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// Is it a valid mode? (only list depths >= 15 bpp)
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if( mode.redBits + mode.greenBits + mode.blueBits < 15 )
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continue;
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// Check for duplicate of current mode in target list
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for( j = 0; j < numModes; ++j )
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{
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if( _glfwVideoModesEqual( &mode, &(list[j]) ) )
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break;
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}
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// If empty list or no match found
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if( numModes == 0 || j == numModes )
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{
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list[numModes++] = mode;
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}
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}
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return numModes;
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}
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//========================================================================
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// Get the desktop video mode
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//========================================================================
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void _glfwPlatformGetDesktopMode( GLFWvidmode *mode )
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{
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_glfwCGToGLFWVideoMode( _glfwDesktopVideoMode, mode );
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}
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