diff options
Diffstat (limited to 'Source/external/SDL2/src/video/cocoa/SDL_cocoaopengl.m')
| -rw-r--r-- | Source/external/SDL2/src/video/cocoa/SDL_cocoaopengl.m | 436 |
1 files changed, 436 insertions, 0 deletions
diff --git a/Source/external/SDL2/src/video/cocoa/SDL_cocoaopengl.m b/Source/external/SDL2/src/video/cocoa/SDL_cocoaopengl.m new file mode 100644 index 0000000..9539c17 --- /dev/null +++ b/Source/external/SDL2/src/video/cocoa/SDL_cocoaopengl.m @@ -0,0 +1,436 @@ +/* + Simple DirectMedia Layer + Copyright (C) 1997-2018 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_internal.h" + +/* NSOpenGL implementation of SDL OpenGL support */ + +#if SDL_VIDEO_OPENGL_CGL +#include "SDL_cocoavideo.h" +#include "SDL_cocoaopengl.h" +#include "SDL_cocoaopengles.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" + +@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]]; + if (self == [NSOpenGLContext currentContext]) { + [self update]; + } else { + [self scheduleUpdate]; + } + } + } else { + [self clearDrawable]; + if (self == [NSOpenGLContext currentContext]) { + [self update]; + } else { + [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) +{ @autoreleasepool +{ + SDL_VideoDisplay *display = SDL_GetDisplayForWindow(window); + SDL_DisplayData *displaydata = (SDL_DisplayData *)display->driverdata; + SDL_bool lion_or_later = floor(NSAppKitVersionNumber) > NSAppKitVersionNumber10_6; + NSOpenGLPixelFormatAttribute attr[32]; + NSOpenGLPixelFormat *fmt; + SDLOpenGLContext *context; + NSOpenGLContext *share_context = nil; + int i = 0; + const char *glversion; + int glversion_major; + int glversion_minor; + + if (_this->gl_config.profile_mask == SDL_GL_CONTEXT_PROFILE_ES) { +#if SDL_VIDEO_OPENGL_EGL + /* Switch to EGL based functions */ + Cocoa_GL_UnloadLibrary(_this); + _this->GL_LoadLibrary = Cocoa_GLES_LoadLibrary; + _this->GL_GetProcAddress = Cocoa_GLES_GetProcAddress; + _this->GL_UnloadLibrary = Cocoa_GLES_UnloadLibrary; + _this->GL_CreateContext = Cocoa_GLES_CreateContext; + _this->GL_MakeCurrent = Cocoa_GLES_MakeCurrent; + _this->GL_SetSwapInterval = Cocoa_GLES_SetSwapInterval; + _this->GL_GetSwapInterval = Cocoa_GLES_GetSwapInterval; + _this->GL_SwapWindow = Cocoa_GLES_SwapWindow; + _this->GL_DeleteContext = Cocoa_GLES_DeleteContext; + + if (Cocoa_GLES_LoadLibrary(_this, NULL) != 0) { + return NULL; + } + return Cocoa_GLES_CreateContext(_this, window); +#else + SDL_SetError("SDL not configured with EGL support"); + return NULL; +#endif + } + if ((_this->gl_config.profile_mask == SDL_GL_CONTEXT_PROFILE_CORE) && !lion_or_later) { + SDL_SetError ("OpenGL Core Profile is not supported on this platform version"); + return NULL; + } + + attr[i++] = NSOpenGLPFAAllowOfflineRenderers; + + /* specify a profile if we're on Lion (10.7) or later. */ + if (lion_or_later) { + NSOpenGLPixelFormatAttribute profile = NSOpenGLProfileVersionLegacy; + if (_this->gl_config.profile_mask == SDL_GL_CONTEXT_PROFILE_CORE) { + profile = NSOpenGLProfileVersion3_2Core; + } + attr[i++] = NSOpenGLPFAOpenGLProfile; + 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"); + 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"); + return NULL; + } + + if ( Cocoa_GL_MakeCurrent(_this, window, context) < 0 ) { + Cocoa_GL_DeleteContext(_this, context); + SDL_SetError("Failed making OpenGL context current"); + return NULL; + } + + if (_this->gl_config.major_version < 3 && + _this->gl_config.profile_mask == 0 && + _this->gl_config.flags == 0) { + /* This is a legacy profile, so to match other backends, we're done. */ + } else { + const GLubyte *(APIENTRY * glGetStringFunc)(GLenum); + + glGetStringFunc = (const GLubyte *(APIENTRY *)(GLenum)) SDL_GL_GetProcAddress("glGetString"); + if (!glGetStringFunc) { + Cocoa_GL_DeleteContext(_this, context); + SDL_SetError ("Failed getting OpenGL glGetString entry point"); + return NULL; + } + + glversion = (const char *)glGetStringFunc(GL_VERSION); + if (glversion == NULL) { + Cocoa_GL_DeleteContext(_this, context); + SDL_SetError ("Failed getting OpenGL context version"); + return NULL; + } + + if (SDL_sscanf(glversion, "%d.%d", &glversion_major, &glversion_minor) != 2) { + Cocoa_GL_DeleteContext(_this, context); + SDL_SetError ("Failed parsing OpenGL context version"); + return NULL; + } + + if ((glversion_major < _this->gl_config.major_version) || + ((glversion_major == _this->gl_config.major_version) && (glversion_minor < _this->gl_config.minor_version))) { + Cocoa_GL_DeleteContext(_this, context); + SDL_SetError ("Failed creating OpenGL context at version requested"); + return NULL; + } + + /* In the future we'll want to do this, but to match other platforms + we'll leave the OpenGL version the way it is for now + */ + /*_this->gl_config.major_version = glversion_major;*/ + /*_this->gl_config.minor_version = glversion_minor;*/ + } + return context; +}} + +int +Cocoa_GL_MakeCurrent(_THIS, SDL_Window * window, SDL_GLContext context) +{ @autoreleasepool +{ + if (context) { + SDLOpenGLContext *nscontext = (SDLOpenGLContext *)context; + [nscontext setWindow:window]; + [nscontext updateIfNeeded]; + [nscontext makeCurrentContext]; + } else { + [NSOpenGLContext clearCurrentContext]; + } + + return 0; +}} + +void +Cocoa_GL_GetDrawableSize(_THIS, SDL_Window * window, int * w, int * h) +{ + SDL_WindowData *windata = (SDL_WindowData *) window->driverdata; + NSView *contentView = [windata->nswindow contentView]; + NSRect viewport = [contentView bounds]; + + if (window->flags & SDL_WINDOW_ALLOW_HIGHDPI) { + /* This gives us the correct viewport for a Retina-enabled view, only + * supported on 10.7+. */ + if ([contentView respondsToSelector:@selector(convertRectToBacking:)]) { + viewport = [contentView convertRectToBacking:viewport]; + } + } + + if (w) { + *w = viewport.size.width; + } + + if (h) { + *h = viewport.size.height; + } +} + +int +Cocoa_GL_SetSwapInterval(_THIS, int interval) +{ @autoreleasepool +{ + NSOpenGLContext *nscontext; + GLint value; + int status; + + if (interval < 0) { /* no extension for this on Mac OS X at the moment. */ + return SDL_SetError("Late swap tearing currently unsupported"); + } + + 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"); + } + + return status; +}} + +int +Cocoa_GL_GetSwapInterval(_THIS) +{ @autoreleasepool +{ + NSOpenGLContext *nscontext; + GLint value; + int status = 0; + + nscontext = (NSOpenGLContext*)SDL_GL_GetCurrentContext(); + if (nscontext != nil) { + [nscontext getValues:&value forParameter:NSOpenGLCPSwapInterval]; + status = (int)value; + } + + return status; +}} + +int +Cocoa_GL_SwapWindow(_THIS, SDL_Window * window) +{ @autoreleasepool +{ + SDLOpenGLContext* nscontext = (SDLOpenGLContext*)SDL_GL_GetCurrentContext(); + SDL_VideoData *videodata = (SDL_VideoData *) _this->driverdata; + + /* on 10.14 ("Mojave") and later, this deadlocks if two contexts in two + threads try to swap at the same time, so put a mutex around it. */ + SDL_LockMutex(videodata->swaplock); + [nscontext flushBuffer]; + [nscontext updateIfNeeded]; + SDL_UnlockMutex(videodata->swaplock); + return 0; +}} + +void +Cocoa_GL_DeleteContext(_THIS, SDL_GLContext context) +{ @autoreleasepool +{ + SDLOpenGLContext *nscontext = (SDLOpenGLContext *)context; + + [nscontext setWindow:NULL]; + [nscontext release]; +}} + +#endif /* SDL_VIDEO_OPENGL_CGL */ + +/* vi: set ts=4 sw=4 expandtab: */ |