/*

SDL - Simple DirectMedia Layer

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 "../../events/SDL_keyboard_c.h"

#include "../../events/SDL_mouse_c.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);

}

/*

*/

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

*/

SDL_SetError("iPhone GL Load Library just here for compatibility");

return -1;

}

return 0;

}

void UIKit_GL_SwapWindow(_THIS, SDL_Window * window)

{

#ifdef SDL_POWER_UIKIT

// Check once a frame to see if we should turn off the battery monitor.

SDL_UIKit_UpdateBatteryMonitoring();

#endif

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: [uiwindow bounds] \

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 */

[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;

}

/* Make this window the current mouse focus for touch input */

SDL_SetMouseFocus(window);

SDL_SetKeyboardFocus(window);

}

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];

}