src/video/uikit/SDL_uikitmodes.m - third_party/sdl - Git at Google

 /*
   Simple DirectMedia Layer
   Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>

   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
   arising from the use of this software.

   Permission is granted to anyone to use this software for any purpose,
   including commercial applications, and to alter it and redistribute it
   freely, subject to the following restrictions:

   1. The origin of this software must not be misrepresented; you must not
      claim that you wrote the original software. If you use this software
      in a product, an acknowledgment in the product documentation would be
      appreciated but is not required.
   2. Altered source versions must be plainly marked as such, and must not be
      misrepresented as being the original software.
   3. This notice may not be removed or altered from any source distribution.
 */
 #include "../../SDL_internal.h"

 #if SDL_VIDEO_DRIVER_UIKIT

 #include "SDL_assert.h"
 #include "SDL_uikitmodes.h"

 @implementation SDL_DisplayData

 @synthesize uiscreen;

 @end

 @implementation SDL_DisplayModeData

 @synthesize uiscreenmode;

 @end


 static int
 UIKit_AllocateDisplayModeData(SDL_DisplayMode * mode,
     UIScreenMode * uiscreenmode)
 {
     SDL_DisplayModeData *data = nil;

     if (uiscreenmode != nil) {
         /* Allocate the display mode data */
         data = [[SDL_DisplayModeData alloc] init];
         if (!data) {
             return SDL_OutOfMemory();
         }

         data.uiscreenmode = uiscreenmode;
     }

     mode->driverdata = (void *) CFBridgingRetain(data);

     return 0;
 }

 static void
 UIKit_FreeDisplayModeData(SDL_DisplayMode * mode)
 {
     if (mode->driverdata != NULL) {
         CFRelease(mode->driverdata);
         mode->driverdata = NULL;
     }
 }

 static int
 UIKit_AddSingleDisplayMode(SDL_VideoDisplay * display, int w, int h,
     UIScreenMode * uiscreenmode)
 {
     SDL_DisplayMode mode;
     SDL_zero(mode);

     mode.format = SDL_PIXELFORMAT_ABGR8888;
     mode.refresh_rate = 0;
     if (UIKit_AllocateDisplayModeData(&mode, uiscreenmode) < 0) {
         return -1;
     }

     mode.w = w;
     mode.h = h;
     if (SDL_AddDisplayMode(display, &mode)) {
         return 0;
     } else {
         UIKit_FreeDisplayModeData(&mode);
         return -1;
     }
 }

 static int
 UIKit_AddDisplayMode(SDL_VideoDisplay * display, int w, int h,
                      UIScreenMode * uiscreenmode, SDL_bool addRotation)
 {
     if (UIKit_AddSingleDisplayMode(display, w, h, uiscreenmode) < 0) {
         return -1;
     }

     if (addRotation) {
         /* Add the rotated version */
         if (UIKit_AddSingleDisplayMode(display, h, w, uiscreenmode) < 0) {
             return -1;
         }
     }

     return 0;
 }

 static int
 UIKit_AddDisplay(UIScreen *uiscreen)
 {
     CGSize size = uiscreen.bounds.size;

     /* Make sure the width/height are oriented correctly */
     if (UIKit_IsDisplayLandscape(uiscreen) != (size.width > size.height)) {
         CGFloat height = size.width;
         size.width = size.height;
         size.height = height;
     }

     SDL_VideoDisplay display;
     SDL_DisplayMode mode;
     SDL_zero(mode);
     mode.format = SDL_PIXELFORMAT_ABGR8888;
     mode.w = (int) size.width;
     mode.h = (int) size.height;

     UIScreenMode *uiscreenmode = uiscreen.currentMode;

     if (UIKit_AllocateDisplayModeData(&mode, uiscreenmode) < 0) {
         return -1;
     }

     SDL_zero(display);
     display.desktop_mode = mode;
     display.current_mode = mode;

     /* Allocate the display data */
     SDL_DisplayData *data = [[SDL_DisplayData alloc] init];
     if (!data) {
         UIKit_FreeDisplayModeData(&display.desktop_mode);
         return SDL_OutOfMemory();
     }

     data.uiscreen = uiscreen;

     display.driverdata = (void *) CFBridgingRetain(data);
     SDL_AddVideoDisplay(&display);

     return 0;
 }

 SDL_bool
 UIKit_IsDisplayLandscape(UIScreen *uiscreen)
 {
 #if !TARGET_OS_TV
     if (uiscreen == [UIScreen mainScreen]) {
         return UIInterfaceOrientationIsLandscape([UIApplication sharedApplication].statusBarOrientation);
     } else
 #endif /* !TARGET_OS_TV */
     {
         CGSize size = uiscreen.bounds.size;
         return (size.width > size.height);
     }
 }

 int
 UIKit_InitModes(_THIS)
 {
     @autoreleasepool {
         for (UIScreen *uiscreen in [UIScreen screens]) {
             if (UIKit_AddDisplay(uiscreen) < 0) {
                 return -1;
             }
         }
     }

     return 0;
 }

 void
 UIKit_GetDisplayModes(_THIS, SDL_VideoDisplay * display)
 {
     @autoreleasepool {
         SDL_DisplayData *data = (__bridge SDL_DisplayData *) display->driverdata;

         SDL_bool isLandscape = UIKit_IsDisplayLandscape(data.uiscreen);
         SDL_bool addRotation = (data.uiscreen == [UIScreen mainScreen]);
         CGFloat scale = data.uiscreen.scale;
         NSArray *availableModes = nil;

 #if TARGET_OS_TV
         addRotation = SDL_FALSE;
         availableModes = @[data.uiscreen.currentMode];
 #else
         availableModes = data.uiscreen.availableModes;
 #endif

 #ifdef __IPHONE_8_0
         /* The UIScreenMode of an iPhone 6 Plus should be 1080x1920 rather than
          * 1242x2208 (414x736@3x), so we should use the native scale. */
         if ([data.uiscreen respondsToSelector:@selector(nativeScale)]) {
             scale = data.uiscreen.nativeScale;
         }
 #endif

         for (UIScreenMode *uimode in availableModes) {
             /* The size of a UIScreenMode is in pixels, but we deal exclusively
              * in points (except in SDL_GL_GetDrawableSize.) */
             int w = (int)(uimode.size.width / scale);
             int h = (int)(uimode.size.height / scale);

             /* Make sure the width/height are oriented correctly */
             if (isLandscape != (w > h)) {
                 int tmp = w;
                 w = h;
                 h = tmp;
             }

             UIKit_AddDisplayMode(display, w, h, uimode, addRotation);
         }
     }
 }

 int
 UIKit_SetDisplayMode(_THIS, SDL_VideoDisplay * display, SDL_DisplayMode * mode)
 {
     @autoreleasepool {
         SDL_DisplayData *data = (__bridge SDL_DisplayData *) display->driverdata;

 #if !TARGET_OS_TV
         SDL_DisplayModeData *modedata = (__bridge SDL_DisplayModeData *)mode->driverdata;
         [data.uiscreen setCurrentMode:modedata.uiscreenmode];
 #endif

         if (data.uiscreen == [UIScreen mainScreen]) {
             /* [UIApplication setStatusBarOrientation:] no longer works reliably
              * in recent iOS versions, so we can't rotate the screen when setting
              * the display mode. */
             if (mode->w > mode->h) {
                 if (!UIKit_IsDisplayLandscape(data.uiscreen)) {
                     return SDL_SetError("Screen orientation does not match display mode size");
                 }
             } else if (mode->w < mode->h) {
                 if (UIKit_IsDisplayLandscape(data.uiscreen)) {
                     return SDL_SetError("Screen orientation does not match display mode size");
                 }
             }
         }
     }

     return 0;
 }

 int
 UIKit_GetDisplayUsableBounds(_THIS, SDL_VideoDisplay * display, SDL_Rect * rect)
 {
     @autoreleasepool {
         int displayIndex = (int) (display - _this->displays);
         SDL_DisplayData *data = (__bridge SDL_DisplayData *) display->driverdata;

         /* the default function iterates displays to make a fake offset,
          as if all the displays were side-by-side, which is fine for iOS. */
         if (SDL_GetDisplayBounds(displayIndex, rect) < 0) {
             return -1;
         }

         CGRect frame = data.uiscreen.bounds;

 #if !TARGET_OS_TV
         if (!UIKit_IsSystemVersionAtLeast(7.0)) {
             frame = [data.uiscreen applicationFrame];
         }
 #endif

         rect->x += frame.origin.x;
         rect->y += frame.origin.y;
         rect->w = frame.size.width;
         rect->h = frame.size.height;
     }

     return 0;
 }

 void
 UIKit_QuitModes(_THIS)
 {
     /* Release Objective-C objects, so higher level doesn't free() them. */
     int i, j;
     @autoreleasepool {
         for (i = 0; i < _this->num_displays; i++) {
             SDL_VideoDisplay *display = &_this->displays[i];

             UIKit_FreeDisplayModeData(&display->desktop_mode);
             for (j = 0; j < display->num_display_modes; j++) {
                 SDL_DisplayMode *mode = &display->display_modes[j];
                 UIKit_FreeDisplayModeData(mode);
             }

             if (display->driverdata != NULL) {
                 CFRelease(display->driverdata);
                 display->driverdata = NULL;
             }
         }
     }
 }

 #endif /* SDL_VIDEO_DRIVER_UIKIT */

 /* vi: set ts=4 sw=4 expandtab: */
	/*
	Simple DirectMedia Layer
	Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>

	This software is provided 'as-is', without any express or implied
	warranty. In no event will the authors be held liable for any damages
	arising from the use of this software.

	Permission is granted to anyone to use this software for any purpose,
	including commercial applications, and to alter it and redistribute it
	freely, subject to the following restrictions:

	1. The origin of this software must not be misrepresented; you must not
	claim that you wrote the original software. If you use this software
	in a product, an acknowledgment in the product documentation would be
	appreciated but is not required.
	2. Altered source versions must be plainly marked as such, and must not be
	misrepresented as being the original software.
	3. This notice may not be removed or altered from any source distribution.
	*/
	#include "../../SDL_internal.h"

	#if SDL_VIDEO_DRIVER_UIKIT

	#include "SDL_assert.h"
	#include "SDL_uikitmodes.h"

	@implementation SDL_DisplayData

	@synthesize uiscreen;

	@end

	@implementation SDL_DisplayModeData

	@synthesize uiscreenmode;

	@end


	static int
	UIKit_AllocateDisplayModeData(SDL_DisplayMode * mode,
	UIScreenMode * uiscreenmode)
	{
	SDL_DisplayModeData *data = nil;

	if (uiscreenmode != nil) {
	/* Allocate the display mode data */
	data = [[SDL_DisplayModeData alloc] init];
	if (!data) {
	return SDL_OutOfMemory();
	}

	data.uiscreenmode = uiscreenmode;
	}

	mode->driverdata = (void *) CFBridgingRetain(data);

	return 0;
	}

	static void
	UIKit_FreeDisplayModeData(SDL_DisplayMode * mode)
	{
	if (mode->driverdata != NULL) {
	CFRelease(mode->driverdata);
	mode->driverdata = NULL;
	}
	}

	static int
	UIKit_AddSingleDisplayMode(SDL_VideoDisplay * display, int w, int h,
	UIScreenMode * uiscreenmode)
	{
	SDL_DisplayMode mode;
	SDL_zero(mode);

	mode.format = SDL_PIXELFORMAT_ABGR8888;
	mode.refresh_rate = 0;
	if (UIKit_AllocateDisplayModeData(&mode, uiscreenmode) < 0) {
	return -1;
	}

	mode.w = w;
	mode.h = h;
	if (SDL_AddDisplayMode(display, &mode)) {
	return 0;
	} else {
	UIKit_FreeDisplayModeData(&mode);
	return -1;
	}
	}

	static int
	UIKit_AddDisplayMode(SDL_VideoDisplay * display, int w, int h,
	UIScreenMode * uiscreenmode, SDL_bool addRotation)
	{
	if (UIKit_AddSingleDisplayMode(display, w, h, uiscreenmode) < 0) {
	return -1;
	}

	if (addRotation) {
	/* Add the rotated version */
	if (UIKit_AddSingleDisplayMode(display, h, w, uiscreenmode) < 0) {
	return -1;
	}
	}

	return 0;
	}

	static int
	UIKit_AddDisplay(UIScreen *uiscreen)
	{
	CGSize size = uiscreen.bounds.size;

	/* Make sure the width/height are oriented correctly */
	if (UIKit_IsDisplayLandscape(uiscreen) != (size.width > size.height)) {
	CGFloat height = size.width;
	size.width = size.height;
	size.height = height;
	}

	SDL_VideoDisplay display;
	SDL_DisplayMode mode;
	SDL_zero(mode);
	mode.format = SDL_PIXELFORMAT_ABGR8888;
	mode.w = (int) size.width;
	mode.h = (int) size.height;

	UIScreenMode *uiscreenmode = uiscreen.currentMode;

	if (UIKit_AllocateDisplayModeData(&mode, uiscreenmode) < 0) {
	return -1;
	}

	SDL_zero(display);
	display.desktop_mode = mode;
	display.current_mode = mode;

	/* Allocate the display data */
	SDL_DisplayData *data = [[SDL_DisplayData alloc] init];
	if (!data) {
	UIKit_FreeDisplayModeData(&display.desktop_mode);
	return SDL_OutOfMemory();
	}

	data.uiscreen = uiscreen;

	display.driverdata = (void *) CFBridgingRetain(data);
	SDL_AddVideoDisplay(&display);

	return 0;
	}

	SDL_bool
	UIKit_IsDisplayLandscape(UIScreen *uiscreen)
	{
	#if !TARGET_OS_TV
	if (uiscreen == [UIScreen mainScreen]) {
	return UIInterfaceOrientationIsLandscape([UIApplication sharedApplication].statusBarOrientation);
	} else
	#endif /* !TARGET_OS_TV */
	{
	CGSize size = uiscreen.bounds.size;
	return (size.width > size.height);
	}
	}

	int
	UIKit_InitModes(_THIS)
	{
	@autoreleasepool {
	for (UIScreen *uiscreen in [UIScreen screens]) {
	if (UIKit_AddDisplay(uiscreen) < 0) {
	return -1;
	}
	}
	}

	return 0;
	}

	void
	UIKit_GetDisplayModes(_THIS, SDL_VideoDisplay * display)
	{
	@autoreleasepool {
	SDL_DisplayData data = (__bridge SDL_DisplayData ) display->driverdata;

	SDL_bool isLandscape = UIKit_IsDisplayLandscape(data.uiscreen);
	SDL_bool addRotation = (data.uiscreen == [UIScreen mainScreen]);
	CGFloat scale = data.uiscreen.scale;
	NSArray *availableModes = nil;

	#if TARGET_OS_TV
	addRotation = SDL_FALSE;
	availableModes = @[data.uiscreen.currentMode];
	#else
	availableModes = data.uiscreen.availableModes;
	#endif

	#ifdef __IPHONE_8_0
	/* The UIScreenMode of an iPhone 6 Plus should be 1080x1920 rather than
	* 1242x2208 (414x736@3x), so we should use the native scale. */
	if ([data.uiscreen respondsToSelector:@selector(nativeScale)]) {
	scale = data.uiscreen.nativeScale;
	}
	#endif

	for (UIScreenMode *uimode in availableModes) {
	/* The size of a UIScreenMode is in pixels, but we deal exclusively
	* in points (except in SDL_GL_GetDrawableSize.) */
	int w = (int)(uimode.size.width / scale);
	int h = (int)(uimode.size.height / scale);

	/* Make sure the width/height are oriented correctly */
	if (isLandscape != (w > h)) {
	int tmp = w;
	w = h;
	h = tmp;
	}

	UIKit_AddDisplayMode(display, w, h, uimode, addRotation);
	}
	}
	}

	int
	UIKit_SetDisplayMode(_THIS, SDL_VideoDisplay * display, SDL_DisplayMode * mode)
	{
	@autoreleasepool {
	SDL_DisplayData data = (__bridge SDL_DisplayData ) display->driverdata;

	#if !TARGET_OS_TV
	SDL_DisplayModeData modedata = (__bridge SDL_DisplayModeData )mode->driverdata;
	[data.uiscreen setCurrentMode:modedata.uiscreenmode];
	#endif

	if (data.uiscreen == [UIScreen mainScreen]) {
	/* [UIApplication setStatusBarOrientation:] no longer works reliably
	* in recent iOS versions, so we can't rotate the screen when setting
	* the display mode. */
	if (mode->w > mode->h) {
	if (!UIKit_IsDisplayLandscape(data.uiscreen)) {
	return SDL_SetError("Screen orientation does not match display mode size");
	}
	} else if (mode->w < mode->h) {
	if (UIKit_IsDisplayLandscape(data.uiscreen)) {
	return SDL_SetError("Screen orientation does not match display mode size");
	}
	}
	}
	}

	return 0;
	}

	int
	UIKit_GetDisplayUsableBounds(_THIS, SDL_VideoDisplay * display, SDL_Rect * rect)
	{
	@autoreleasepool {
	int displayIndex = (int) (display - _this->displays);
	SDL_DisplayData data = (__bridge SDL_DisplayData ) display->driverdata;

	/* the default function iterates displays to make a fake offset,
	as if all the displays were side-by-side, which is fine for iOS. */
	if (SDL_GetDisplayBounds(displayIndex, rect) < 0) {
	return -1;
	}

	CGRect frame = data.uiscreen.bounds;

	#if !TARGET_OS_TV
	if (!UIKit_IsSystemVersionAtLeast(7.0)) {
	frame = [data.uiscreen applicationFrame];
	}
	#endif

	rect->x += frame.origin.x;
	rect->y += frame.origin.y;
	rect->w = frame.size.width;
	rect->h = frame.size.height;
	}

	return 0;
	}

	void
	UIKit_QuitModes(_THIS)
	{
	/* Release Objective-C objects, so higher level doesn't free() them. */
	int i, j;
	@autoreleasepool {
	for (i = 0; i < _this->num_displays; i++) {
	SDL_VideoDisplay *display = &_this->displays[i];

	UIKit_FreeDisplayModeData(&display->desktop_mode);
	for (j = 0; j < display->num_display_modes; j++) {
	SDL_DisplayMode *mode = &display->display_modes[j];
	UIKit_FreeDisplayModeData(mode);
	}

	if (display->driverdata != NULL) {
	CFRelease(display->driverdata);
	display->driverdata = NULL;
	}
	}
	}
	}

	#endif /* SDL_VIDEO_DRIVER_UIKIT */

	/* vi: set ts=4 sw=4 expandtab: */