Atlas - SDL_uikitwindow.m
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1/*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2018 Sam Lantinga <[email protected]>
4
5  This software is provided 'as-is', without any express or implied
6  warranty.  In no event will the authors be held liable for any damages
7  arising from the use of this software.
8
9  Permission is granted to anyone to use this software for any purpose,
10  including commercial applications, and to alter it and redistribute it
11  freely, subject to the following restrictions:
12
13  1. The origin of this software must not be misrepresented; you must not
14     claim that you wrote the original software. If you use this software
15     in a product, an acknowledgment in the product documentation would be
16     appreciated but is not required.
17  2. Altered source versions must be plainly marked as such, and must not be
18     misrepresented as being the original software.
19  3. This notice may not be removed or altered from any source distribution.
20*/
21#include "../../SDL_internal.h"
22
23#if SDL_VIDEO_DRIVER_UIKIT
24
25#include "SDL_syswm.h"
26#include "SDL_video.h"
27#include "SDL_mouse.h"
28#include "SDL_assert.h"
29#include "SDL_hints.h"
30#include "../SDL_sysvideo.h"
31#include "../SDL_pixels_c.h"
32#include "../../events/SDL_events_c.h"
33
34#include "SDL_uikitvideo.h"
35#include "SDL_uikitevents.h"
36#include "SDL_uikitmodes.h"
37#include "SDL_uikitwindow.h"
38#import "SDL_uikitappdelegate.h"
39
40#import "SDL_uikitview.h"
41#import "SDL_uikitopenglview.h"
42
43#include <Foundation/Foundation.h>
44
45@implementation SDL_WindowData
46
47@synthesize uiwindow;
48@synthesize viewcontroller;
49@synthesize views;
50
51- (instancetype)init
52{
53    if ((self = [super init])) {
54        views = [NSMutableArray new];
55    }
56
57    return self;
58}
59
60@end
61
62@interface SDL_uikitwindow : UIWindow
63
64- (void)layoutSubviews;
65
66@end
67
68@implementation SDL_uikitwindow
69
70- (void)layoutSubviews
71{
72    /* Workaround to fix window orientation issues in iOS 8+. */
73    self.frame = self.screen.bounds;
74    [super layoutSubviews];
75}
76
77@end
78
79
80static int SetupWindowData(_THIS, SDL_Window *window, UIWindow *uiwindow, SDL_bool created)
81{
82    SDL_VideoDisplay *display = SDL_GetDisplayForWindow(window);
83    SDL_DisplayData *displaydata = (__bridge SDL_DisplayData *) display->driverdata;
84    SDL_uikitview *view;
85
86    CGRect frame = UIKit_ComputeViewFrame(window, displaydata.uiscreen);
87    int width  = (int) frame.size.width;
88    int height = (int) frame.size.height;
89
90    SDL_WindowData *data = [[SDL_WindowData alloc] init];
91    if (!data) {
92        return SDL_OutOfMemory();
93    }
94
95    window->driverdata = (void *) CFBridgingRetain(data);
96
97    data.uiwindow = uiwindow;
98
99    /* only one window on iOS, always shown */
100    window->flags &= ~SDL_WINDOW_HIDDEN;
101
102    if (displaydata.uiscreen != [UIScreen mainScreen]) {
103        window->flags &= ~SDL_WINDOW_RESIZABLE;  /* window is NEVER resizable */
104        window->flags &= ~SDL_WINDOW_INPUT_FOCUS;  /* never has input focus */
105        window->flags |= SDL_WINDOW_BORDERLESS;  /* never has a status bar. */
106    }
107
108#if !TARGET_OS_TV
109    if (displaydata.uiscreen == [UIScreen mainScreen]) {
110        /* SDL_CreateWindow sets the window w&h to the display's bounds if the
111         * fullscreen flag is set. But the display bounds orientation might not
112         * match what we want, and GetSupportedOrientations call below uses the
113         * window w&h. They're overridden below anyway, so we'll just set them
114         * to the requested size for the purposes of determining orientation. */
115        window->w = window->windowed.w;
116        window->h = window->windowed.h;
117
118        NSUInteger orients = UIKit_GetSupportedOrientations(window);
119        BOOL supportsLandscape = (orients & UIInterfaceOrientationMaskLandscape) != 0;
120        BOOL supportsPortrait = (orients & (UIInterfaceOrientationMaskPortrait|UIInterfaceOrientationMaskPortraitUpsideDown)) != 0;
121
122        /* Make sure the width/height are oriented correctly */
123        if ((width > height && !supportsLandscape) || (height > width && !supportsPortrait)) {
124            int temp = width;
125            width = height;
126            height = temp;
127        }
128    }
129#endif /* !TARGET_OS_TV */
130
131    window->x = 0;
132    window->y = 0;
133    window->w = width;
134    window->h = height;
135
136    /* The View Controller will handle rotating the view when the device
137     * orientation changes. This will trigger resize events, if appropriate. */
138    data.viewcontroller = [[SDL_uikitviewcontroller alloc] initWithSDLWindow:window];
139
140    /* The window will initially contain a generic view so resizes, touch events,
141     * etc. can be handled without an active OpenGL view/context. */
142    view = [[SDL_uikitview alloc] initWithFrame:frame];
143
144    /* Sets this view as the controller's view, and adds the view to the window
145     * heirarchy. */
146    [view setSDLWindow:window];
147
148    /* Make this window the current mouse focus for touch input */
149    if (displaydata.uiscreen == [UIScreen mainScreen]) {
150        SDL_SetMouseFocus(window);
151        SDL_SetKeyboardFocus(window);
152    }
153
154    return 0;
155}
156
157int
158UIKit_CreateWindow(_THIS, SDL_Window *window)
159{
160    @autoreleasepool {
161        SDL_VideoDisplay *display = SDL_GetDisplayForWindow(window);
162        SDL_DisplayData *data = (__bridge SDL_DisplayData *) display->driverdata;
163
164        /* SDL currently puts this window at the start of display's linked list. We rely on this. */
165        SDL_assert(_this->windows == window);
166
167        /* We currently only handle a single window per display on iOS */
168        if (window->next != NULL) {
169            return SDL_SetError("Only one window allowed per display.");
170        }
171
172        /* If monitor has a resolution of 0x0 (hasn't been explicitly set by the
173         * user, so it's in standby), try to force the display to a resolution
174         * that most closely matches the desired window size. */
175#if !TARGET_OS_TV
176        const CGSize origsize = data.uiscreen.currentMode.size;
177        if ((origsize.width == 0.0f) && (origsize.height == 0.0f)) {
178            if (display->num_display_modes == 0) {
179                _this->GetDisplayModes(_this, display);
180            }
181
182            int i;
183            const SDL_DisplayMode *bestmode = NULL;
184            for (i = display->num_display_modes; i >= 0; i--) {
185                const SDL_DisplayMode *mode = &display->display_modes[i];
186                if ((mode->w >= window->w) && (mode->h >= window->h)) {
187                    bestmode = mode;
188                }
189            }
190
191            if (bestmode) {
192                SDL_DisplayModeData *modedata = (__bridge SDL_DisplayModeData *)bestmode->driverdata;
193                [data.uiscreen setCurrentMode:modedata.uiscreenmode];
194
195                /* desktop_mode doesn't change here (the higher level will
196                 * use it to set all the screens back to their defaults
197                 * upon window destruction, SDL_Quit(), etc. */
198                display->current_mode = *bestmode;
199            }
200        }
201
202        if (data.uiscreen == [UIScreen mainScreen]) {
203            if (window->flags & (SDL_WINDOW_FULLSCREEN|SDL_WINDOW_BORDERLESS)) {
204                [UIApplication sharedApplication].statusBarHidden = YES;
205            } else {
206                [UIApplication sharedApplication].statusBarHidden = NO;
207            }
208        }
209#endif /* !TARGET_OS_TV */
210
211        /* ignore the size user requested, and make a fullscreen window */
212        /* !!! FIXME: can we have a smaller view? */
213        UIWindow *uiwindow = [[SDL_uikitwindow alloc] initWithFrame:data.uiscreen.bounds];
214
215        /* put the window on an external display if appropriate. */
216        if (data.uiscreen != [UIScreen mainScreen]) {
217            [uiwindow setScreen:data.uiscreen];
218        }
219
220        if (SetupWindowData(_this, window, uiwindow, SDL_TRUE) < 0) {
221            return -1;
222        }
223    }
224
225    return 1;
226}
227
228void
229UIKit_SetWindowTitle(_THIS, SDL_Window * window)
230{
231    @autoreleasepool {
232        SDL_WindowData *data = (__bridge SDL_WindowData *) window->driverdata;
233        data.viewcontroller.title = @(window->title);
234    }
235}
236
237void
238UIKit_ShowWindow(_THIS, SDL_Window * window)
239{
240    @autoreleasepool {
241        SDL_WindowData *data = (__bridge SDL_WindowData *) window->driverdata;
242        [data.uiwindow makeKeyAndVisible];
243    }
244}
245
246void
247UIKit_HideWindow(_THIS, SDL_Window * window)
248{
249    @autoreleasepool {
250        SDL_WindowData *data = (__bridge SDL_WindowData *) window->driverdata;
251        data.uiwindow.hidden = YES;
252    }
253}
254
255void
256UIKit_RaiseWindow(_THIS, SDL_Window * window)
257{
258    /* We don't currently offer a concept of "raising" the SDL window, since
259     * we only allow one per display, in the iOS fashion.
260     * However, we use this entry point to rebind the context to the view
261     * during OnWindowRestored processing. */
262    _this->GL_MakeCurrent(_this, _this->current_glwin, _this->current_glctx);
263}
264
265static void
266UIKit_UpdateWindowBorder(_THIS, SDL_Window * window)
267{
268    SDL_WindowData *data = (__bridge SDL_WindowData *) window->driverdata;
269    SDL_uikitviewcontroller *viewcontroller = data.viewcontroller;
270
271#if !TARGET_OS_TV
272    if (data.uiwindow.screen == [UIScreen mainScreen]) {
273        if (window->flags & (SDL_WINDOW_FULLSCREEN | SDL_WINDOW_BORDERLESS)) {
274            [UIApplication sharedApplication].statusBarHidden = YES;
275        } else {
276            [UIApplication sharedApplication].statusBarHidden = NO;
277        }
278
279        /* iOS 7+ won't update the status bar until we tell it to. */
280        if ([viewcontroller respondsToSelector:@selector(setNeedsStatusBarAppearanceUpdate)]) {
281            [viewcontroller setNeedsStatusBarAppearanceUpdate];
282        }
283    }
284
285    /* Update the view's frame to account for the status bar change. */
286    viewcontroller.view.frame = UIKit_ComputeViewFrame(window, data.uiwindow.screen);
287#endif /* !TARGET_OS_TV */
288
289#ifdef SDL_IPHONE_KEYBOARD
290    /* Make sure the view is offset correctly when the keyboard is visible. */
291    [viewcontroller updateKeyboard];
292#endif
293
294    [viewcontroller.view setNeedsLayout];
295    [viewcontroller.view layoutIfNeeded];
296}
297
298void
299UIKit_SetWindowBordered(_THIS, SDL_Window * window, SDL_bool bordered)
300{
301    @autoreleasepool {
302        UIKit_UpdateWindowBorder(_this, window);
303    }
304}
305
306void
307UIKit_SetWindowFullscreen(_THIS, SDL_Window * window, SDL_VideoDisplay * display, SDL_bool fullscreen)
308{
309    @autoreleasepool {
310        UIKit_UpdateWindowBorder(_this, window);
311    }
312}
313
314void
315UIKit_DestroyWindow(_THIS, SDL_Window * window)
316{
317    @autoreleasepool {
318        if (window->driverdata != NULL) {
319            SDL_WindowData *data = (SDL_WindowData *) CFBridgingRelease(window->driverdata);
320            NSArray *views = nil;
321
322            [data.viewcontroller stopAnimation];
323
324            /* Detach all views from this window. We use a copy of the array
325             * because setSDLWindow will remove the object from the original
326             * array, which would be undesirable if we were iterating over it. */
327            views = [data.views copy];
328            for (SDL_uikitview *view in views) {
329                [view setSDLWindow:NULL];
330            }
331
332            /* iOS may still hold a reference to the window after we release it.
333             * We want to make sure the SDL view controller isn't accessed in
334             * that case, because it would contain an invalid pointer to the old
335             * SDL window. */
336            data.uiwindow.rootViewController = nil;
337            data.uiwindow.hidden = YES;
338        }
339    }
340    window->driverdata = NULL;
341}
342
343SDL_bool
344UIKit_GetWindowWMInfo(_THIS, SDL_Window * window, SDL_SysWMinfo * info)
345{
346    @autoreleasepool {
347        SDL_WindowData *data = (__bridge SDL_WindowData *) window->driverdata;
348
349        if (info->version.major <= SDL_MAJOR_VERSION) {
350            int versionnum = SDL_VERSIONNUM(info->version.major, info->version.minor, info->version.patch);
351
352            info->subsystem = SDL_SYSWM_UIKIT;
353            info->info.uikit.window = data.uiwindow;
354
355            /* These struct members were added in SDL 2.0.4. */
356            if (versionnum >= SDL_VERSIONNUM(2,0,4)) {
357                if ([data.viewcontroller.view isKindOfClass:[SDL_uikitopenglview class]]) {
358                    SDL_uikitopenglview *glview = (SDL_uikitopenglview *)data.viewcontroller.view;
359                    info->info.uikit.framebuffer = glview.drawableFramebuffer;
360                    info->info.uikit.colorbuffer = glview.drawableRenderbuffer;
361                    info->info.uikit.resolveFramebuffer = glview.msaaResolveFramebuffer;
362                } else {
363                    info->info.uikit.framebuffer = 0;
364                    info->info.uikit.colorbuffer = 0;
365                    info->info.uikit.resolveFramebuffer = 0;
366                }
367            }
368
369            return SDL_TRUE;
370        } else {
371            SDL_SetError("Application not compiled with SDL %d.%d",
372                         SDL_MAJOR_VERSION, SDL_MINOR_VERSION);
373            return SDL_FALSE;
374        }
375    }
376}
377
378#if !TARGET_OS_TV
379NSUInteger
380UIKit_GetSupportedOrientations(SDL_Window * window)
381{
382    const char *hint = SDL_GetHint(SDL_HINT_ORIENTATIONS);
383    NSUInteger validOrientations = UIInterfaceOrientationMaskAll;
384    NSUInteger orientationMask = 0;
385
386    @autoreleasepool {
387        SDL_WindowData *data = (__bridge SDL_WindowData *) window->driverdata;
388        UIApplication *app = [UIApplication sharedApplication];
389
390        /* Get all possible valid orientations. If the app delegate doesn't tell
391         * us, we get the orientations from Info.plist via UIApplication. */
392        if ([app.delegate respondsToSelector:@selector(application:supportedInterfaceOrientationsForWindow:)]) {
393            validOrientations = [app.delegate application:app supportedInterfaceOrientationsForWindow:data.uiwindow];
394        } else if ([app respondsToSelector:@selector(supportedInterfaceOrientationsForWindow:)]) {
395            validOrientations = [app supportedInterfaceOrientationsForWindow:data.uiwindow];
396        }
397
398        if (hint != NULL) {
399            NSArray *orientations = [@(hint) componentsSeparatedByString:@" "];
400
401            if ([orientations containsObject:@"LandscapeLeft"]) {
402                orientationMask |= UIInterfaceOrientationMaskLandscapeLeft;
403            }
404            if ([orientations containsObject:@"LandscapeRight"]) {
405                orientationMask |= UIInterfaceOrientationMaskLandscapeRight;
406            }
407            if ([orientations containsObject:@"Portrait"]) {
408                orientationMask |= UIInterfaceOrientationMaskPortrait;
409            }
410            if ([orientations containsObject:@"PortraitUpsideDown"]) {
411                orientationMask |= UIInterfaceOrientationMaskPortraitUpsideDown;
412            }
413        }
414
415        if (orientationMask == 0 && (window->flags & SDL_WINDOW_RESIZABLE)) {
416            /* any orientation is okay. */
417            orientationMask = UIInterfaceOrientationMaskAll;
418        }
419
420        if (orientationMask == 0) {
421            if (window->w >= window->h) {
422                orientationMask |= UIInterfaceOrientationMaskLandscape;
423            }
424            if (window->h >= window->w) {
425                orientationMask |= (UIInterfaceOrientationMaskPortrait | UIInterfaceOrientationMaskPortraitUpsideDown);
426            }
427        }
428
429        /* Don't allow upside-down orientation on phones, so answering calls is in the natural orientation */
430        if ([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPhone) {
431            orientationMask &= ~UIInterfaceOrientationMaskPortraitUpsideDown;
432        }
433
434        /* If none of the specified orientations are actually supported by the
435         * app, we'll revert to what the app supports. An exception would be
436         * thrown by the system otherwise. */
437        if ((validOrientations & orientationMask) == 0) {
438            orientationMask = validOrientations;
439        }
440    }
441
442    return orientationMask;
443}
444#endif /* !TARGET_OS_TV */
445
446int
447SDL_iPhoneSetAnimationCallback(SDL_Window * window, int interval, void (*callback)(void*), void *callbackParam)
448{
449    if (!window || !window->driverdata) {
450        return SDL_SetError("Invalid window");
451    }
452
453    @autoreleasepool {
454        SDL_WindowData *data = (__bridge SDL_WindowData *)window->driverdata;
455        [data.viewcontroller setAnimationCallback:interval
456                                         callback:callback
457                                    callbackParam:callbackParam];
458    }
459
460    return 0;
461}
462
463#endif /* SDL_VIDEO_DRIVER_UIKIT */
464
465/* vi: set ts=4 sw=4 expandtab: */
466
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