| /* |
| Simple DirectMedia Layer |
| Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.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 "SDL_config.h" |
| |
| /* NSOpenGL implementation of SDL OpenGL support */ |
| |
| #if SDL_VIDEO_OPENGL_CGL |
| #include "SDL_cocoavideo.h" |
| #include "SDL_cocoaopengl.h" |
| |
| #include <OpenGL/CGLTypes.h> |
| #include <OpenGL/OpenGL.h> |
| #include <OpenGL/CGLRenderers.h> |
| |
| #include "SDL_loadso.h" |
| #include "SDL_opengl.h" |
| |
| #define DEFAULT_OPENGL "/System/Library/Frameworks/OpenGL.framework/Libraries/libGL.dylib" |
| |
| |
| #ifndef kCGLPFAOpenGLProfile |
| #define kCGLPFAOpenGLProfile 99 |
| #endif |
| #ifndef kCGLOGLPVersion_Legacy |
| #define kCGLOGLPVersion_Legacy 0x1000 |
| #endif |
| #ifndef kCGLOGLPVersion_3_2_Core |
| #define kCGLOGLPVersion_3_2_Core 0x3200 |
| #endif |
| |
| @implementation SDLOpenGLContext : NSOpenGLContext |
| |
| - (id)initWithFormat:(NSOpenGLPixelFormat *)format |
| shareContext:(NSOpenGLContext *)share |
| { |
| self = [super initWithFormat:format shareContext:share]; |
| if (self) { |
| SDL_AtomicSet(&self->dirty, 0); |
| self->window = NULL; |
| } |
| return self; |
| } |
| |
| - (void)scheduleUpdate |
| { |
| SDL_AtomicAdd(&self->dirty, 1); |
| } |
| |
| /* This should only be called on the thread on which a user is using the context. */ |
| - (void)updateIfNeeded |
| { |
| int value = SDL_AtomicSet(&self->dirty, 0); |
| if (value > 0) { |
| /* We call the real underlying update here, since -[SDLOpenGLContext update] just calls us. */ |
| [super update]; |
| } |
| } |
| |
| /* This should only be called on the thread on which a user is using the context. */ |
| - (void)update |
| { |
| /* This ensures that regular 'update' calls clear the atomic dirty flag. */ |
| [self scheduleUpdate]; |
| [self updateIfNeeded]; |
| } |
| |
| /* Updates the drawable for the contexts and manages related state. */ |
| - (void)setWindow:(SDL_Window *)newWindow |
| { |
| if (self->window) { |
| SDL_WindowData *oldwindowdata = (SDL_WindowData *)self->window->driverdata; |
| |
| /* Make sure to remove us from the old window's context list, or we'll get scheduled updates from it too. */ |
| NSMutableArray *contexts = oldwindowdata->nscontexts; |
| @synchronized (contexts) { |
| [contexts removeObject:self]; |
| } |
| } |
| |
| self->window = newWindow; |
| |
| if (newWindow) { |
| SDL_WindowData *windowdata = (SDL_WindowData *)newWindow->driverdata; |
| |
| /* Now sign up for scheduled updates for the new window. */ |
| NSMutableArray *contexts = windowdata->nscontexts; |
| @synchronized (contexts) { |
| [contexts addObject:self]; |
| } |
| |
| if ([self view] != [windowdata->nswindow contentView]) { |
| [self setView:[windowdata->nswindow contentView]]; |
| [self scheduleUpdate]; |
| } |
| } else { |
| [self clearDrawable]; |
| [self scheduleUpdate]; |
| } |
| } |
| |
| @end |
| |
| |
| int |
| Cocoa_GL_LoadLibrary(_THIS, const char *path) |
| { |
| /* Load the OpenGL library */ |
| if (path == NULL) { |
| path = SDL_getenv("SDL_OPENGL_LIBRARY"); |
| } |
| if (path == NULL) { |
| path = DEFAULT_OPENGL; |
| } |
| _this->gl_config.dll_handle = SDL_LoadObject(path); |
| if (!_this->gl_config.dll_handle) { |
| return -1; |
| } |
| SDL_strlcpy(_this->gl_config.driver_path, path, |
| SDL_arraysize(_this->gl_config.driver_path)); |
| return 0; |
| } |
| |
| void * |
| Cocoa_GL_GetProcAddress(_THIS, const char *proc) |
| { |
| return SDL_LoadFunction(_this->gl_config.dll_handle, proc); |
| } |
| |
| void |
| Cocoa_GL_UnloadLibrary(_THIS) |
| { |
| SDL_UnloadObject(_this->gl_config.dll_handle); |
| _this->gl_config.dll_handle = NULL; |
| } |
| |
| SDL_GLContext |
| Cocoa_GL_CreateContext(_THIS, SDL_Window * window) |
| { |
| const int wantver = (_this->gl_config.major_version << 8) | |
| (_this->gl_config.minor_version); |
| SDL_VideoData *data = (SDL_VideoData *) _this->driverdata; |
| NSAutoreleasePool *pool; |
| SDL_VideoDisplay *display = SDL_GetDisplayForWindow(window); |
| SDL_DisplayData *displaydata = (SDL_DisplayData *)display->driverdata; |
| NSOpenGLPixelFormatAttribute attr[32]; |
| NSOpenGLPixelFormat *fmt; |
| SDLOpenGLContext *context; |
| NSOpenGLContext *share_context = nil; |
| int i = 0; |
| |
| if (_this->gl_config.profile_mask == SDL_GL_CONTEXT_PROFILE_ES) { |
| SDL_SetError ("OpenGL ES not supported on this platform"); |
| return NULL; |
| } |
| |
| /* Sadly, we'll have to update this as life progresses, since we need to |
| set an enum for context profiles, not a context version number */ |
| if (wantver > 0x0302) { |
| SDL_SetError ("OpenGL > 3.2 is not supported on this platform"); |
| return NULL; |
| } |
| |
| pool = [[NSAutoreleasePool alloc] init]; |
| |
| /* specify a profile if we're on Lion (10.7) or later. */ |
| if (data->osversion >= 0x1070) { |
| NSOpenGLPixelFormatAttribute profile = kCGLOGLPVersion_Legacy; |
| if (_this->gl_config.profile_mask == SDL_GL_CONTEXT_PROFILE_CORE) { |
| if (wantver == 0x0302) { |
| profile = kCGLOGLPVersion_3_2_Core; |
| } |
| } |
| attr[i++] = kCGLPFAOpenGLProfile; |
| attr[i++] = profile; |
| } |
| |
| attr[i++] = NSOpenGLPFAColorSize; |
| attr[i++] = SDL_BYTESPERPIXEL(display->current_mode.format)*8; |
| |
| attr[i++] = NSOpenGLPFADepthSize; |
| attr[i++] = _this->gl_config.depth_size; |
| |
| if (_this->gl_config.double_buffer) { |
| attr[i++] = NSOpenGLPFADoubleBuffer; |
| } |
| |
| if (_this->gl_config.stereo) { |
| attr[i++] = NSOpenGLPFAStereo; |
| } |
| |
| if (_this->gl_config.stencil_size) { |
| attr[i++] = NSOpenGLPFAStencilSize; |
| attr[i++] = _this->gl_config.stencil_size; |
| } |
| |
| if ((_this->gl_config.accum_red_size + |
| _this->gl_config.accum_green_size + |
| _this->gl_config.accum_blue_size + |
| _this->gl_config.accum_alpha_size) > 0) { |
| attr[i++] = NSOpenGLPFAAccumSize; |
| attr[i++] = _this->gl_config.accum_red_size + _this->gl_config.accum_green_size + _this->gl_config.accum_blue_size + _this->gl_config.accum_alpha_size; |
| } |
| |
| if (_this->gl_config.multisamplebuffers) { |
| attr[i++] = NSOpenGLPFASampleBuffers; |
| attr[i++] = _this->gl_config.multisamplebuffers; |
| } |
| |
| if (_this->gl_config.multisamplesamples) { |
| attr[i++] = NSOpenGLPFASamples; |
| attr[i++] = _this->gl_config.multisamplesamples; |
| attr[i++] = NSOpenGLPFANoRecovery; |
| } |
| |
| if (_this->gl_config.accelerated >= 0) { |
| if (_this->gl_config.accelerated) { |
| attr[i++] = NSOpenGLPFAAccelerated; |
| } else { |
| attr[i++] = NSOpenGLPFARendererID; |
| attr[i++] = kCGLRendererGenericFloatID; |
| } |
| } |
| |
| attr[i++] = NSOpenGLPFAScreenMask; |
| attr[i++] = CGDisplayIDToOpenGLDisplayMask(displaydata->display); |
| attr[i] = 0; |
| |
| fmt = [[NSOpenGLPixelFormat alloc] initWithAttributes:attr]; |
| if (fmt == nil) { |
| SDL_SetError ("Failed creating OpenGL pixel format"); |
| [pool release]; |
| return NULL; |
| } |
| |
| if (_this->gl_config.share_with_current_context) { |
| share_context = (NSOpenGLContext*)SDL_GL_GetCurrentContext(); |
| } |
| |
| context = [[SDLOpenGLContext alloc] initWithFormat:fmt shareContext:share_context]; |
| |
| [fmt release]; |
| |
| if (context == nil) { |
| SDL_SetError ("Failed creating OpenGL context"); |
| [pool release]; |
| return NULL; |
| } |
| |
| [pool release]; |
| |
| if ( Cocoa_GL_MakeCurrent(_this, window, context) < 0 ) { |
| Cocoa_GL_DeleteContext(_this, context); |
| return NULL; |
| } |
| |
| return context; |
| } |
| |
| int |
| Cocoa_GL_MakeCurrent(_THIS, SDL_Window * window, SDL_GLContext context) |
| { |
| NSAutoreleasePool *pool; |
| |
| pool = [[NSAutoreleasePool alloc] init]; |
| |
| if (context) { |
| SDLOpenGLContext *nscontext = (SDLOpenGLContext *)context; |
| [nscontext setWindow:window]; |
| [nscontext updateIfNeeded]; |
| [nscontext makeCurrentContext]; |
| } else { |
| [NSOpenGLContext clearCurrentContext]; |
| } |
| |
| [pool release]; |
| return 0; |
| } |
| |
| int |
| Cocoa_GL_SetSwapInterval(_THIS, int interval) |
| { |
| NSAutoreleasePool *pool; |
| NSOpenGLContext *nscontext; |
| GLint value; |
| int status; |
| |
| pool = [[NSAutoreleasePool alloc] init]; |
| |
| nscontext = (NSOpenGLContext*)SDL_GL_GetCurrentContext(); |
| if (nscontext != nil) { |
| value = interval; |
| [nscontext setValues:&value forParameter:NSOpenGLCPSwapInterval]; |
| status = 0; |
| } else { |
| status = SDL_SetError("No current OpenGL context"); |
| } |
| |
| [pool release]; |
| return status; |
| } |
| |
| int |
| Cocoa_GL_GetSwapInterval(_THIS) |
| { |
| NSAutoreleasePool *pool; |
| NSOpenGLContext *nscontext; |
| GLint value; |
| int status = 0; |
| |
| pool = [[NSAutoreleasePool alloc] init]; |
| |
| nscontext = (NSOpenGLContext*)SDL_GL_GetCurrentContext(); |
| if (nscontext != nil) { |
| [nscontext getValues:&value forParameter:NSOpenGLCPSwapInterval]; |
| status = (int)value; |
| } |
| |
| [pool release]; |
| return status; |
| } |
| |
| void |
| Cocoa_GL_SwapWindow(_THIS, SDL_Window * window) |
| { |
| NSAutoreleasePool *pool; |
| |
| pool = [[NSAutoreleasePool alloc] init]; |
| |
| SDLOpenGLContext* nscontext = (NSOpenGLContext*)SDL_GL_GetCurrentContext(); |
| [nscontext flushBuffer]; |
| [nscontext updateIfNeeded]; |
| |
| [pool release]; |
| } |
| |
| void |
| Cocoa_GL_DeleteContext(_THIS, SDL_GLContext context) |
| { |
| NSAutoreleasePool *pool; |
| SDLOpenGLContext *nscontext = (SDLOpenGLContext *)context; |
| |
| pool = [[NSAutoreleasePool alloc] init]; |
| |
| [nscontext setWindow:NULL]; |
| [nscontext release]; |
| |
| [pool release]; |
| } |
| |
| #endif /* SDL_VIDEO_OPENGL_CGL */ |
| |
| /* vi: set ts=4 sw=4 expandtab: */ |