/*+
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    SDL - Simple DirectMedia Layer+
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    Copyright (C) 1997-2009 Sam Lantinga+
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+
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    This library is free software; you can redistribute it and/or+
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    modify it under the terms of the GNU Lesser General Public+
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    License as published by the Free Software Foundation; either+
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    version 2.1 of the License, or (at your option) any later version.+
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+
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    This library is distributed in the hope that it will be useful,+
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    but WITHOUT ANY WARRANTY; without even the implied warranty of+
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU+
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    Lesser General Public License for more details.+
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+
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    You should have received a copy of the GNU Lesser General Public+
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    License along with this library; if not, write to the Free Software+
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    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA+
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+
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    Sam Lantinga+
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    slouken@libsdl.org+
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*/+
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+
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#import <UIKit/UIKit.h>+
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+
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#include "SDL_config.h"+
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+
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#include "SDL_video.h"+
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#include "SDL_mouse.h"+
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#include "../SDL_sysvideo.h"+
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#include "../SDL_pixels_c.h"+
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#include "../../events/SDL_events_c.h"+
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+
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#include "SDL_uikitvideo.h"+
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#include "SDL_uikitevents.h"+
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#include "SDL_uikitwindow.h"+
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#include "SDL_uikitopengles.h"+
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+
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#include "SDL_renderer_sw.h"+
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#include "SDL_renderer_gles.h"+
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+
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#include "SDL_assert.h"+
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+
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#define UIKITVID_DRIVER_NAME "uikit"+
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+
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/* Initialization/Query functions */+
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static int UIKit_VideoInit(_THIS);+
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static void UIKit_GetDisplayModes(_THIS, SDL_VideoDisplay * sdl_display);+
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static int UIKit_SetDisplayMode(_THIS, SDL_VideoDisplay * display,+
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                                SDL_DisplayMode * mode);+
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static void UIKit_VideoQuit(_THIS);+
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+
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BOOL SDL_UIKit_supports_multiple_displays = NO;+
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+
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/* DUMMY driver bootstrap functions */+
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+
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static int+
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UIKit_Available(void)+
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{+
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	return (1);+
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}+
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+
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static void UIKit_DeleteDevice(SDL_VideoDevice * device)+
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{+
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    SDL_free(device);+
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}+
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+
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static SDL_VideoDevice *+
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UIKit_CreateDevice(int devindex)+
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{+
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    SDL_VideoDevice *device;+
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+
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    /* Initialize all variables that we clean on shutdown */+
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    device = (SDL_VideoDevice *) SDL_calloc(1, sizeof(SDL_VideoDevice));+
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    if (!device) {+
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        SDL_OutOfMemory();+
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        if (device) {+
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            SDL_free(device);+
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        }+
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        return (0);+
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    }+
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+
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    /* Set the function pointers */+
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    device->VideoInit = UIKit_VideoInit;+
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    device->VideoQuit = UIKit_VideoQuit;+
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    device->GetDisplayModes = UIKit_GetDisplayModes;+
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    device->SetDisplayMode = UIKit_SetDisplayMode;+
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    device->PumpEvents = UIKit_PumpEvents;+
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	device->CreateWindow = UIKit_CreateWindow;+
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	device->DestroyWindow = UIKit_DestroyWindow;+
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	+
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	+
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	/* OpenGL (ES) functions */+
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	device->GL_MakeCurrent		= UIKit_GL_MakeCurrent;+
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	device->GL_SwapWindow		= UIKit_GL_SwapWindow;+
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	device->GL_CreateContext	= UIKit_GL_CreateContext;+
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	device->GL_DeleteContext    = UIKit_GL_DeleteContext;+
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	device->GL_GetProcAddress   = UIKit_GL_GetProcAddress;+
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	device->GL_LoadLibrary	    = UIKit_GL_LoadLibrary;+
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	device->free = UIKit_DeleteDevice;+
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+
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	device->gl_config.accelerated = 1;+
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	+
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    return device;+
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}+
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+
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VideoBootStrap UIKIT_bootstrap = {+
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    UIKITVID_DRIVER_NAME, "SDL UIKit video driver",+
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    UIKit_Available, UIKit_CreateDevice+
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};+
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+
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+
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/*+
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!!! FIXME:+
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+
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The main screen should list a AxB mode for portrait orientation, and then+
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 also list BxA for landscape mode. When setting a given resolution, we should+
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 rotate the view's transform appropriately (extra credit if you check the+
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 accelerometer and rotate the display so it's never upside down).+
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+
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  http://iphonedevelopment.blogspot.com/2008/10/starting-in-landscape-mode-without.html+
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+
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*/+
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+
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static void+
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UIKit_GetDisplayModes(_THIS, SDL_VideoDisplay * display)+
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{+
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    UIScreen *uiscreen = (UIScreen *) display->driverdata;+
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    SDL_DisplayMode mode;+
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    SDL_zero(mode);+
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+
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    // availableModes showed up in 3.2 (the iPad and later). We should only+
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    //  land here for at least that version of the OS.+
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    if (!SDL_UIKit_supports_multiple_displays) {+
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        const CGRect rect = [uiscreen bounds];+
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        mode.format = SDL_PIXELFORMAT_ABGR8888;+
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        mode.w = (int) rect.size.width;+
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        mode.h = (int) rect.size.height;+
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        mode.refresh_rate = 0;+
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        mode.driverdata = NULL;+
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        SDL_AddDisplayMode(display, &mode);+
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        return;+
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    }+
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+
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    const NSArray *modes = [uiscreen availableModes];+
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    const NSUInteger mode_count = [modes count];+
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    NSUInteger i;+
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    for (i = 0; i < mode_count; i++) {+
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        UIScreenMode *uimode = (UIScreenMode *) [modes objectAtIndex:i];+
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        const CGSize size = [uimode size];+
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        mode.format = SDL_PIXELFORMAT_ABGR8888;+
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        mode.w = (int) size.width;+
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        mode.h = (int) size.height;+
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        mode.refresh_rate = 0;+
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        mode.driverdata = uimode;+
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        [uimode retain];+
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        SDL_AddDisplayMode(display, &mode);+
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    }+
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}+
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+
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+
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static void+
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UIKit_AddDisplay(UIScreen *uiscreen, int w, int h)+
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{+
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    SDL_VideoDisplay display;+
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    SDL_DisplayMode mode;+
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    SDL_zero(mode);+
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    mode.format = SDL_PIXELFORMAT_ABGR8888;+
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    mode.w = w;+
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    mode.h = h;+
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    mode.refresh_rate = 0;+
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+
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    SDL_zero(display);+
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    display.desktop_mode = mode;+
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    display.current_mode = mode;+
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+
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    [uiscreen retain];+
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    display.driverdata = uiscreen;+
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    SDL_AddVideoDisplay(&display);+
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}+
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+
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+
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int+
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UIKit_VideoInit(_THIS)+
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{+
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    _this->gl_config.driver_loaded = 1;+
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+
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    NSString *reqSysVer = @"3.2";+
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    NSString *currSysVer = [[UIDevice currentDevice] systemVersion];+
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    if ([currSysVer compare:reqSysVer options:NSNumericSearch] != NSOrderedAscending)+
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        SDL_UIKit_supports_multiple_displays = YES;+
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+
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    // If this is iPhoneOS < 3.2, all devices are one screen, 320x480 pixels.+
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    //  The iPad added both a larger main screen and the ability to use+
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    //  external displays.+
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    if (!SDL_UIKit_supports_multiple_displays) {+
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        // Just give 'em the whole main screen.+
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        UIScreen *uiscreen = [UIScreen mainScreen];+
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        const CGRect rect = [uiscreen bounds];+
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        UIKit_AddDisplay(uiscreen, (int)rect.size.width, (int)rect.size.height);+
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    } else {+
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        const NSArray *screens = [UIScreen screens];+
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        const NSUInteger screen_count = [screens count];+
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        NSUInteger i;+
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        for (i = 0; i < screen_count; i++) {+
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            // the main screen is the first element in the array.+
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            UIScreen *uiscreen = (UIScreen *) [screens objectAtIndex:i];+
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            const CGSize size = [[uiscreen currentMode] size];+
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            UIKit_AddDisplay(uiscreen, (int) size.width, (int) size.height);+
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        }+
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    }+
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+
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    /* We're done! */+
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    return 0;+
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}+
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+
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static int+
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UIKit_SetDisplayMode(_THIS, SDL_VideoDisplay * display, SDL_DisplayMode * mode)+
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{+
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    UIScreen *uiscreen = (UIScreen *) display->driverdata;+
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    if (!SDL_UIKit_supports_multiple_displays) {+
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        // Not on at least iPhoneOS 3.2 (versions prior to iPad).+
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        SDL_assert(mode->driverdata == NULL);+
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    } else {+
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        UIScreenMode *uimode = (UIScreenMode *) mode->driverdata;+
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        [uiscreen setCurrentMode:uimode];+
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    }+
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+
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    return 0;+
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}+
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+
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void+
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UIKit_VideoQuit(_THIS)+
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{+
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    // Release Objective-C objects, so higher level doesn't free() them.+
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    int i, j;+
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    for (i = 0; i < _this->num_displays; i++) {+
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        SDL_VideoDisplay *display = &_this->displays[i];+
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        UIScreen *uiscreen = (UIScreen *) display->driverdata;+
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        [uiscreen release];+
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        display->driverdata = NULL;+
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        for (j = 0; j < display->num_display_modes; j++) {+
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            SDL_DisplayMode *mode = &display->display_modes[j];+
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            UIScreenMode *uimode = (UIScreenMode *) mode->driverdata;+
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            if (uimode) {+
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                [uimode release];+
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                mode->driverdata = NULL;+
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            }+
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        }+
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    }+
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}+
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+
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/* vi: set ts=4 sw=4 expandtab: */+
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