Mercurial > sdl-ios-xcode
diff src/video/uikit/SDL_uikitopengles.m @ 2765:f55c87ae336b
Final merge of Google Summer of Code 2008 work...
Bring SDL to iPhone and iPod Touch
by Holmes Futrell, mentored by Sam Lantinga
author | Sam Lantinga <slouken@libsdl.org> |
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date | Sat, 04 Oct 2008 06:46:59 +0000 |
parents | |
children | 99210400e8b9 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/video/uikit/SDL_uikitopengles.m Sat Oct 04 06:46:59 2008 +0000 @@ -0,0 +1,137 @@ +/* + SDL - Simple DirectMedia Layer + Copyright (C) 1997-2006 Sam Lantinga + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, write to the Free Software + Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + + Sam Lantinga + slouken@libsdl.org + */ + +#include "SDL_uikitopengles.h" +#include "SDL_uikitopenglview.h" +#include "SDL_uikitappdelegate.h" +#include "SDL_uikitwindow.h" +#include "jumphack.h" +#include "SDL_sysvideo.h" +#include "SDL_loadso.h" +#include <dlfcn.h> + +static int UIKit_GL_Initialize(_THIS); + +void * +UIKit_GL_GetProcAddress(_THIS, const char *proc) +{ + /* Look through all SO's for the proc symbol. Here's why: + -Looking for the path to the OpenGL Library seems not to work in the iPhone Simulator. + -We don't know that the path won't change in the future. + */ + return SDL_LoadFunction(RTLD_DEFAULT, proc); +} + +/* + note that SDL_GL_Delete context makes it current without passing the window +*/ +int UIKit_GL_MakeCurrent(_THIS, SDL_Window * window, SDL_GLContext context) +{ + + if (context) { + SDL_WindowData *data = (SDL_WindowData *)window->driverdata; + [data->view setCurrentContext]; + } + else { + [EAGLContext setCurrentContext: nil]; + } + + return 0; +} + +int +UIKit_GL_LoadLibrary(_THIS, const char *path) +{ + /* + shouldn't be passing a path into this function + why? Because we've already loaded the library + and because the SDK forbids loading an external SO + */ + if (path != NULL) { + SDL_SetError("iPhone GL Load Library just here for compatibility"); + return -1; + } + return 0; +} + + +void UIKit_GL_SwapWindow(_THIS, SDL_Window * window) +{ + + SDL_WindowData *data = (SDL_WindowData *)window->driverdata; + + if (nil == data->view) { + return; + } + [data->view swapBuffers]; + /* since now we've got something to draw + make the window visible */ + [data->uiwindow makeKeyAndVisible]; + + /* we need to let the event cycle run, or the OS won't update the OpenGL view! */ + SDL_PumpEvents(); + +} + +SDL_GLContext UIKit_GL_CreateContext(_THIS, SDL_Window * window) +{ + + SDL_uikitopenglview *view; + + SDL_WindowData *data = (SDL_WindowData *)window->driverdata; + + /* construct our view, passing in SDL's OpenGL configuration data */ + view = [[SDL_uikitopenglview alloc] initWithFrame: [[UIScreen mainScreen] applicationFrame] \ + retainBacking: _this->gl_config.retained_backing \ + rBits: _this->gl_config.red_size \ + gBits: _this->gl_config.green_size \ + bBits: _this->gl_config.blue_size \ + aBits: _this->gl_config.alpha_size \ + depthBits: _this->gl_config.depth_size]; + + data->view = view; + + /* add the view to our window */ + [data->uiwindow addSubview: view ]; + + /* Don't worry, the window retained the view */ + [view release]; + + if ( UIKit_GL_MakeCurrent(_this, window, view) < 0 ) { + UIKit_GL_DeleteContext(_this, view); + return NULL; + } + + return view; +} + +void UIKit_GL_DeleteContext(_THIS, SDL_GLContext context) +{ + /* the delegate has retained the view, this will release him */ + SDL_uikitopenglview *view = (SDL_uikitopenglview *)context; + /* this will also delete it */ + [view removeFromSuperview]; + + return; +} + +