src/video/uikit/SDL_uikitwindow.m
author Ryan C. Gordon <icculus@icculus.org>
Sun, 27 Mar 2011 01:35:19 -0400
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iOS: Report both landscape and portrait orientation as display modes.
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997-2011 Sam Lantinga
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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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    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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    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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    Sam Lantinga
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    slouken@libsdl.org
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*/
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#include "SDL_config.h"
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#include "SDL_syswm.h"
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#include "SDL_video.h"
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#include "SDL_mouse.h"
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#include "SDL_assert.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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#include "SDL_uikitvideo.h"
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#include "SDL_uikitevents.h"
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#include "SDL_uikitwindow.h"
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#import "SDL_uikitappdelegate.h"
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#import "SDL_uikitopenglview.h"
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#include <Foundation/Foundation.h>
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static int SetupWindowData(_THIS, SDL_Window *window, UIWindow *uiwindow, SDL_bool created)
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{
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    SDL_VideoDisplay *display = SDL_GetDisplayForWindow(window);
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    UIScreen *uiscreen = (UIScreen *) display->driverdata;
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    SDL_WindowData *data;
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    /* Allocate the window data */
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    data = (SDL_WindowData *)SDL_malloc(sizeof(*data));
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    if (!data) {
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        SDL_OutOfMemory();
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        return -1;
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    }
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    data->uiwindow = uiwindow;
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    data->view = nil;
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    /* Fill in the SDL window with the window data */
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    {
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        window->x = 0;
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        window->y = 0;
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        window->w = (int)uiwindow.frame.size.width;
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        window->h = (int)uiwindow.frame.size.height;
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    }
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    window->driverdata = data;
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    window->flags |= SDL_WINDOW_FULLSCREEN;        /* window is always fullscreen */
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    window->flags |= SDL_WINDOW_SHOWN;            /* only one window on iPod touch, always shown */
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    // SDL_WINDOW_BORDERLESS controls whether status bar is hidden.
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    // This is only set if the window is on the main screen. Other screens
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    //  just force the window to have the borderless flag.
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    if ([UIScreen mainScreen] != uiscreen) {
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        window->flags &= ~SDL_WINDOW_RESIZABLE;  // window is NEVER resizeable
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        window->flags &= ~SDL_WINDOW_INPUT_FOCUS;  // never has input focus
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    } else {
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        window->flags |= SDL_WINDOW_INPUT_FOCUS;  // always has input focus
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        if (window->flags & SDL_WINDOW_BORDERLESS) {
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            [UIApplication sharedApplication].statusBarHidden = YES;
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        } else {
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            [UIApplication sharedApplication].statusBarHidden = NO;
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        }
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        // Rotate the view if we have to, but only on the main screen
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        //  (presumably, an external display doesn't report orientation).
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        const CGSize uisize = [[uiscreen currentMode] size];
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        if ( ((window->w > window->h) && (uisize.width < uisize.height)) ||
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             ((window->w < window->h) && (uisize.width > uisize.height)) ) {
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            // !!! FIXME: flip orientation.
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        }
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        if (window->flags & SDL_WINDOW_RESIZABLE) {
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            // !!! FIXME: register for orientation change alerts.
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        }
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    }
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    return 0;
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}
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int
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UIKit_CreateWindow(_THIS, SDL_Window *window)
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{
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    SDL_VideoDisplay *display = SDL_GetDisplayForWindow(window);
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    UIScreen *uiscreen = (UIScreen *) display->driverdata;
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    // SDL currently puts this window at the start of display's linked list. We rely on this.
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    SDL_assert(_this->windows == window);
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    /* We currently only handle a single window per display on iPhone */
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    if (window->next != NULL) {
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        SDL_SetError("Only one window allowed per display.");
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        return -1;
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    }
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    // Non-mainscreen windows must be force to borderless, as there's no
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    //  status bar there, and we want to get the right dimensions later in
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    //  this function.
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    if ([UIScreen mainScreen] != uiscreen) {
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        window->flags |= SDL_WINDOW_BORDERLESS;
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    }
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    // If monitor has a resolution of 0x0 (hasn't been explicitly set by the
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    //  user, so it's in standby), try to force the display to a resolution
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    //  that most closely matches the desired window size.
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    if (SDL_UIKit_supports_multiple_displays) {
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        const CGSize origsize = [[uiscreen currentMode] size];
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        if ((origsize.width == 0.0f) && (origsize.height == 0.0f)) {
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            if (display->num_display_modes == 0) {
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                _this->GetDisplayModes(_this, display);
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            }
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            int i;
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            const SDL_DisplayMode *bestmode = NULL;
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            for (i = display->num_display_modes; i >= 0; i--) {
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                const SDL_DisplayMode *mode = &display->display_modes[i];
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                if ((mode->w >= window->w) && (mode->h >= window->h))
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                    bestmode = mode;
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            }
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            if (bestmode) {
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                UIScreenMode *uimode = (UIScreenMode *) bestmode->driverdata;
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                [uiscreen setCurrentMode:uimode];
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                display->desktop_mode = *bestmode;
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                display->current_mode = *bestmode;
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            }
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        }
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    }
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    /* ignore the size user requested, and make a fullscreen window */
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    // !!! FIXME: can we have a smaller view?
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    UIWindow *uiwindow = [UIWindow alloc];
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    if (window->flags & SDL_WINDOW_BORDERLESS)
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        uiwindow = [uiwindow initWithFrame:[uiscreen bounds]];
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    else
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        uiwindow = [uiwindow initWithFrame:[uiscreen applicationFrame]];
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    if (SDL_UIKit_supports_multiple_displays) {
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        [uiwindow setScreen:uiscreen];
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    }
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    if (SetupWindowData(_this, window, uiwindow, SDL_TRUE) < 0) {
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        [uiwindow release];
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        return -1;
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    }    
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    return 1;
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}
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void
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UIKit_DestroyWindow(_THIS, SDL_Window * window) {
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    SDL_WindowData *data = (SDL_WindowData *)window->driverdata;
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    if (data) {
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        [data->uiwindow release];
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        SDL_free(data);
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        window->driverdata = NULL;
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    }
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}
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SDL_bool
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UIKit_GetWindowWMInfo(_THIS, SDL_Window * window, SDL_SysWMinfo * info)
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{
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    UIWindow *uiwindow = ((SDL_WindowData *) window->driverdata)->uiwindow;
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    if (info->version.major <= SDL_MAJOR_VERSION) {
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        info->subsystem = SDL_SYSWM_UIKIT;
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        info->info.uikit.window = uiwindow;
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        return SDL_TRUE;
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    } else {
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        SDL_SetError("Application not compiled with SDL %d.%d\n",
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                     SDL_MAJOR_VERSION, SDL_MINOR_VERSION);
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        return SDL_FALSE;
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    }
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}
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/* vi: set ts=4 sw=4 expandtab: */