mirror of
https://github.com/gwm17/glfw.git
synced 2024-10-08 23:27:25 -04:00
132 lines
4.2 KiB
Objective-C
132 lines
4.2 KiB
Objective-C
//========================================================================
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// GLFW - An OpenGL library
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// Platform: Cocoa/NSOpenGL
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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) 2009-2010 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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// Check whether the display mode should be included in enumeration
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//========================================================================
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static GLboolean modeIsGood(CGDisplayModeRef mode)
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{
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uint32_t flags = CGDisplayModeGetIOFlags(mode);
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if (!(flags & kDisplayModeValidFlag) || !(flags & kDisplayModeSafeFlag))
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return GL_FALSE;
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if (flags & kDisplayModeInterlacedFlag)
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return GL_FALSE;
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if (flags & kDisplayModeTelevisionFlag)
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return GL_FALSE;
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if (flags & kDisplayModeStretchedFlag)
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return GL_FALSE;
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CFStringRef format = CGDisplayModeCopyPixelEncoding(mode);
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if (CFStringCompare(format, CFSTR(IO16BitDirectPixels), 0) &&
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CFStringCompare(format, CFSTR(IO32BitDirectPixels), 0))
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{
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CFRelease(format);
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return GL_FALSE;
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}
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CFRelease(format);
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return GL_TRUE;
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}
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//========================================================================
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// Convert Core Graphics display mode to GLFW video mode
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//========================================================================
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static GLFWvidmode vidmodeFromCGDisplayMode(CGDisplayModeRef mode)
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{
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GLFWvidmode result;
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result.width = CGDisplayModeGetWidth(mode);
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result.height = CGDisplayModeGetHeight(mode);
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CFStringRef format = CGDisplayModeCopyPixelEncoding(mode);
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if (CFStringCompare(format, CFSTR(IO16BitDirectPixels), 0) == 0)
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{
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result.redBits = 5;
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result.greenBits = 5;
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result.blueBits = 5;
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}
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else
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{
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result.redBits = 8;
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result.greenBits = 8;
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result.blueBits = 8;
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}
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CFRelease(format);
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return result;
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}
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//////////////////////////////////////////////////////////////////////////
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////// GLFW platform API //////
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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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CGDisplayModeRef mode;
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CFArrayRef modes;
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CFIndex count, i;
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int stored = 0;
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modes = CGDisplayCopyAllDisplayModes(CGMainDisplayID(), NULL);
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count = CFArrayGetCount(modes);
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for (i = 0; i < count && stored < maxcount; i++)
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{
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mode = (CGDisplayModeRef) CFArrayGetValueAtIndex(modes, i);
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if (modeIsGood(mode))
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list[stored++] = vidmodeFromCGDisplayMode(mode);
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}
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CFRelease(modes);
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return stored;
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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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*mode = vidmodeFromCGDisplayMode(_glfwLibrary.NS.desktopMode);
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}
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