src/video/cocoa/SDL_cocoaopengl.h
author Jørgen P. Tjernø
Wed, 07 Aug 2013 16:29:21 -0700
changeset 7594 6abcf951af68
parent 7389 361d1a0c90f6
child 7595 ede2237fcebf
permissions -rw-r--r--
Mac: Don't -[NSOpenGLContext update] on (potentially) the wrong thread.

If the user is using their context from a non-main thread, we could be
calling -[NSOpenGLContext update] on our thread, while they were
accessing it on their thread.

With this change, we schedule updates when the event comes in on the
main thread, and act on them when the user calls SDL_GL_MakeCurrent or
SDL_GL_SwapWindow.
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/*
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  Simple DirectMedia Layer
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  Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>
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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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  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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  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 be
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     appreciated but is not required.
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  2. Altered source versions must be plainly marked as such, and must not be
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     misrepresented as being the original software.
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  3. This notice may not be removed or altered from any source distribution.
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*/
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#include "SDL_config.h"
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#ifndef _SDL_cocoaopengl_h
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#define _SDL_cocoaopengl_h
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#if SDL_VIDEO_OPENGL_CGL
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#include "SDL_atomic.h"
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#import <Cocoa/Cocoa.h>
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struct SDL_GLDriverData
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{
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    int initialized;
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};
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@interface SDLOpenGLContext : NSOpenGLContext {
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    SDL_atomic_t dirty;
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}
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- (id)initWithFormat:(NSOpenGLPixelFormat *)format
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        shareContext:(NSOpenGLContext *)share;
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- (void)scheduleUpdate;
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- (void)updateIfNeeded;
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@end
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/* OpenGL functions */
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extern int Cocoa_GL_LoadLibrary(_THIS, const char *path);
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extern void *Cocoa_GL_GetProcAddress(_THIS, const char *proc);
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extern void Cocoa_GL_UnloadLibrary(_THIS);
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extern SDL_GLContext Cocoa_GL_CreateContext(_THIS, SDL_Window * window);
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extern int Cocoa_GL_MakeCurrent(_THIS, SDL_Window * window,
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                                SDL_GLContext context);
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extern int Cocoa_GL_SetSwapInterval(_THIS, int interval);
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extern int Cocoa_GL_GetSwapInterval(_THIS);
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extern void Cocoa_GL_SwapWindow(_THIS, SDL_Window * window);
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extern void Cocoa_GL_DeleteContext(_THIS, SDL_GLContext context);
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#endif /* SDL_VIDEO_OPENGL_CGL */
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#endif /* _SDL_cocoaopengl_h */
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/* vi: set ts=4 sw=4 expandtab: */