This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
SDL_uikitvideo.m
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2009 Sam Lantinga
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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
*/
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#import <UIKit/UIKit.h>
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#include "SDL_config.h"
#include "SDL_video.h"
#include "SDL_mouse.h"
#include "../SDL_sysvideo.h"
#include "../SDL_pixels_c.h"
#include "../../events/SDL_events_c.h"
#include "SDL_uikitvideo.h"
#include "SDL_uikitevents.h"
#include "SDL_uikitwindow.h"
#include "SDL_uikitopengles.h"
#include "SDL_renderer_sw.h"
#include "SDL_renderer_gles.h"
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#include "SDL_assert.h"
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#define UIKITVID_DRIVER_NAME "uikit"
/* Initialization/Query functions */
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,
SDL_DisplayMode * mode);
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static void UIKit_VideoQuit(_THIS);
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static BOOL supports_multiple_displays = NO;
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/* DUMMY driver bootstrap functions */
static int
UIKit_Available(void)
{
return (1);
}
static void UIKit_DeleteDevice(SDL_VideoDevice * device)
{
SDL_free(device);
}
static SDL_VideoDevice *
UIKit_CreateDevice(int devindex)
{
SDL_VideoDevice *device;
/* Initialize all variables that we clean on shutdown */
device = (SDL_VideoDevice *) SDL_calloc(1, sizeof(SDL_VideoDevice));
if (!device) {
SDL_OutOfMemory();
if (device) {
SDL_free(device);
}
return (0);
}
/* Set the function pointers */
device->VideoInit = UIKit_VideoInit;
device->VideoQuit = UIKit_VideoQuit;
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device->GetDisplayModes = UIKit_GetDisplayModes;
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device->SetDisplayMode = UIKit_SetDisplayMode;
device->PumpEvents = UIKit_PumpEvents;
device->CreateWindow = UIKit_CreateWindow;
device->DestroyWindow = UIKit_DestroyWindow;
/* OpenGL (ES) functions */
device->GL_MakeCurrent = UIKit_GL_MakeCurrent;
device->GL_SwapWindow = UIKit_GL_SwapWindow;
device->GL_CreateContext = UIKit_GL_CreateContext;
device->GL_DeleteContext = UIKit_GL_DeleteContext;
device->GL_GetProcAddress = UIKit_GL_GetProcAddress;
device->GL_LoadLibrary = UIKit_GL_LoadLibrary;
device->free = UIKit_DeleteDevice;
device->gl_config.accelerated = 1;
return device;
}
VideoBootStrap UIKIT_bootstrap = {
UIKITVID_DRIVER_NAME, "SDL UIKit video driver",
UIKit_Available, UIKit_CreateDevice
};
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/*
!!! FIXME:
The main screen should list a AxB mode for portrait orientation, and then
also list BxA for landscape mode. When setting a given resolution, we should
rotate the view's transform appropriately (extra credit if you check the
accelerometer and rotate the display so it's never upside down).
http://iphonedevelopment.blogspot.com/2008/10/starting-in-landscape-mode-without.html
*/
static void
UIKit_GetDisplayModes(_THIS, SDL_VideoDisplay * display)
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const UIScreen *screen = (UIScreen *) display->driverdata;
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SDL_DisplayMode mode;
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SDL_zero(mode);
// availableModes showed up in 3.2 (the iPad and later). We should only
// land here for at least that version of the OS.
if (!supports_multiple_displays) {
const CGRect rect = [screen bounds];
mode.format = SDL_PIXELFORMAT_ABGR8888;
mode.w = (int) rect.size.width;
mode.h = (int) rect.size.height;
mode.refresh_rate = 0;
mode.driverdata = NULL;
SDL_AddDisplayMode(display, &mode);
return;
}
const NSArray *modes = [screen availableModes];
const NSUInteger mode_count = [modes count];
NSUInteger i;
for (i = 0; i < mode_count; i++) {
UIScreenMode *uimode = (UIScreenMode *) [modes objectAtIndex:i];
const CGSize size = [uimode size];
mode.format = SDL_PIXELFORMAT_ABGR8888;
mode.w = (int) size.width;
mode.h = (int) size.height;
mode.refresh_rate = 0;
mode.driverdata = uimode;
[uimode retain];
SDL_AddDisplayMode(display, &mode);
}
}
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static void
UIKit_AddDisplay(UIScreen *screen, int w, int h)
{
SDL_VideoDisplay display;
SDL_DisplayMode mode;
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SDL_zero(mode);
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mode.format = SDL_PIXELFORMAT_ABGR8888;
mode.w = w;
mode.h = h;
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mode.refresh_rate = 0;
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SDL_zero(display);
display.desktop_mode = mode;
display.current_mode = mode;
display.driverdata = screen;
[screen retain];
SDL_AddVideoDisplay(&display);
}
int
UIKit_VideoInit(_THIS)
{
_this->gl_config.driver_loaded = 1;
const float version = [[[UIDevice currentDevice] systemVersion] floatValue];
supports_multiple_displays = (version >= 3.2f);
// If this is iPhoneOS < 3.2, all devices are one screen, 320x480 pixels.
// The iPad added both a larger main screen and the ability to use
// external displays.
if (!supports_multiple_displays) {
// Just give 'em the whole main screen.
UIScreen *screen = [UIScreen mainScreen];
const CGRect rect = [screen bounds];
UIKit_AddDisplay(screen, (int)rect.size.width, (int)rect.size.height);
} else {
const NSArray *screens = [UIScreen screens];
const NSUInteger screen_count = [screens count];
NSUInteger i;
for (i = 0; i < screen_count; i++) {
// the main screen is the first element in the array.
UIScreen *screen = (UIScreen *) [screens objectAtIndex:i];
const CGSize size = [[screen currentMode] size];
UIKit_AddDisplay(screen, (int) size.width, (int) size.height);
}
}
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/* We're done! */
return 0;
}
static int
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UIKit_SetDisplayMode(_THIS, SDL_VideoDisplay * display, SDL_DisplayMode * mode)
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UIScreen *screen = (UIScreen *) display->driverdata;
if (!supports_multiple_displays) {
// Not on at least iPhoneOS 3.2 (versions prior to iPad).
SDL_assert(mode->driverdata == NULL);
} else {
UIScreenMode *uimode = (UIScreenMode *) mode->driverdata;
[screen setCurrentMode:uimode];
}
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return 0;
}
void
UIKit_VideoQuit(_THIS)
{
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// Release Objective-C objects, so higher level doesn't free() them.
int i, j;
for (i = 0; i < _this->num_displays; i++) {
SDL_VideoDisplay *display = &_this->displays[i];
UIScreen *screen = (UIScreen *) display->driverdata;
[((UIScreen *) display->driverdata) release];
display->driverdata = NULL;
for (j = 0; j < display->num_display_modes; j++) {
SDL_DisplayMode *mode = &display->display_modes[j];
UIScreenMode *uimode = (UIScreenMode *) mode->driverdata;
if (uimode) {
[uimode release];
mode->driverdata = NULL;
}
}
}
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}
/* vi: set ts=4 sw=4 expandtab: */