glfw/src/cocoa_opengl.m

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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/
//------------------------------------------------------------------------
// Copyright (c) 2009-2010 Camilla Berglund <elmindreda@elmindreda.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.
//
//========================================================================
#include "internal.h"
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//////////////////////////////////////////////////////////////////////////
////// GLFW platform API //////
//////////////////////////////////////////////////////////////////////////
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//========================================================================
// Make the OpenGL context associated with the specified window current
//========================================================================
void _glfwPlatformMakeContextCurrent(_GLFWwindow* window)
{
if (window)
[window->NSGL.context makeCurrentContext];
else
[NSOpenGLContext clearCurrentContext];
}
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//========================================================================
// Swap buffers
//========================================================================
void _glfwPlatformSwapBuffers(void)
{
_GLFWwindow* window = _glfwLibrary.currentWindow;
// ARP appears to be unnecessary, but this is future-proof
[window->NSGL.context flushBuffer];
}
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//========================================================================
// Set double buffering swap interval
//========================================================================
void _glfwPlatformSwapInterval(int interval)
{
_GLFWwindow* window = _glfwLibrary.currentWindow;
GLint sync = interval;
[window->NSGL.context setValues:&sync forParameter:NSOpenGLCPSwapInterval];
}
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//========================================================================
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// Check if an OpenGL extension is available at runtime
//========================================================================
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int _glfwPlatformExtensionSupported(const char* extension)
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{
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// There are no NSGL extensions
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return GL_FALSE;
}
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//========================================================================
// Get the function pointer to an OpenGL function
//========================================================================
GLFWglproc _glfwPlatformGetProcAddress(const char* procname)
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{
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CFStringRef symbolName = CFStringCreateWithCString(kCFAllocatorDefault,
procname,
kCFStringEncodingASCII);
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GLFWglproc symbol = CFBundleGetFunctionPointerForName(_glfwLibrary.NSGL.framework,
symbolName);
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CFRelease(symbolName);
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return symbol;
}
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//========================================================================
// Copies the specified OpenGL state categories from src to dst
//========================================================================
void _glfwPlatformCopyContext(_GLFWwindow* src, _GLFWwindow* dst, unsigned long mask)
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{
[dst->NSGL.context copyAttributesFromContext:src->NSGL.context withMask:mask];
}