annotate src/video/uikit/SDL_uikitvideo.m @ 5134:7b7da52e8775

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author Sam Lantinga <slouken@libsdl.org>
date Tue, 01 Feb 2011 08:59:22 -0800
parents 8b7988f42fcb
children fb424691cfc7
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
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23 #import <UIKit/UIKit.h>
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24
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25 #include "SDL_config.h"
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26
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27 #include "SDL_video.h"
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28 #include "SDL_mouse.h"
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29 #include "../SDL_sysvideo.h"
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30 #include "../SDL_pixels_c.h"
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31 #include "../../events/SDL_events_c.h"
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32
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33 #include "SDL_uikitvideo.h"
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34 #include "SDL_uikitevents.h"
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35 #include "SDL_uikitwindow.h"
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36 #include "SDL_uikitopengles.h"
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37
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38 #include "SDL_renderer_sw.h"
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39 #include "SDL_renderer_gles.h"
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40
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41 #include "SDL_assert.h"
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42
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43 #define UIKITVID_DRIVER_NAME "uikit"
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44
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45 /* Initialization/Query functions */
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46 static int UIKit_VideoInit(_THIS);
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47 static void UIKit_GetDisplayModes(_THIS, SDL_VideoDisplay * sdl_display);
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48 static int UIKit_SetDisplayMode(_THIS, SDL_VideoDisplay * display,
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49 SDL_DisplayMode * mode);
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50 static void UIKit_VideoQuit(_THIS);
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51
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52 BOOL SDL_UIKit_supports_multiple_displays = NO;
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53
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54 /* DUMMY driver bootstrap functions */
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55
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56 static int
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57 UIKit_Available(void)
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58 {
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59 return (1);
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60 }
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61
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62 static void UIKit_DeleteDevice(SDL_VideoDevice * device)
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63 {
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64 SDL_free(device);
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65 }
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66
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67 static SDL_VideoDevice *
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68 UIKit_CreateDevice(int devindex)
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69 {
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70 SDL_VideoDevice *device;
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71
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72 /* Initialize all variables that we clean on shutdown */
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73 device = (SDL_VideoDevice *) SDL_calloc(1, sizeof(SDL_VideoDevice));
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74 if (!device) {
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75 SDL_OutOfMemory();
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76 if (device) {
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77 SDL_free(device);
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78 }
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79 return (0);
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80 }
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81
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82 /* Set the function pointers */
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83 device->VideoInit = UIKit_VideoInit;
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84 device->VideoQuit = UIKit_VideoQuit;
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85 device->GetDisplayModes = UIKit_GetDisplayModes;
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86 device->SetDisplayMode = UIKit_SetDisplayMode;
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87 device->PumpEvents = UIKit_PumpEvents;
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88 device->CreateWindow = UIKit_CreateWindow;
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89 device->DestroyWindow = UIKit_DestroyWindow;
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90 device->GetWindowWMInfo = UIKit_GetWindowWMInfo;
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91
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92
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93 /* OpenGL (ES) functions */
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94 device->GL_MakeCurrent = UIKit_GL_MakeCurrent;
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95 device->GL_SwapWindow = UIKit_GL_SwapWindow;
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96 device->GL_CreateContext = UIKit_GL_CreateContext;
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97 device->GL_DeleteContext = UIKit_GL_DeleteContext;
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98 device->GL_GetProcAddress = UIKit_GL_GetProcAddress;
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99 device->GL_LoadLibrary = UIKit_GL_LoadLibrary;
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100 device->free = UIKit_DeleteDevice;
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101
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102 device->gl_config.accelerated = 1;
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103
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104 return device;
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105 }
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106
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107 VideoBootStrap UIKIT_bootstrap = {
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108 UIKITVID_DRIVER_NAME, "SDL UIKit video driver",
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109 UIKit_Available, UIKit_CreateDevice
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110 };
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111
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112
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113 /*
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114 !!! FIXME:
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115
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116 The main screen should list a AxB mode for portrait orientation, and then
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117 also list BxA for landscape mode. When setting a given resolution, we should
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118 rotate the view's transform appropriately (extra credit if you check the
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119 accelerometer and rotate the display so it's never upside down).
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120
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121 http://iphonedevelopment.blogspot.com/2008/10/starting-in-landscape-mode-without.html
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122
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123 */
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124
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125 static void
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126 UIKit_GetDisplayModes(_THIS, SDL_VideoDisplay * display)
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127 {
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128 UIScreen *uiscreen = (UIScreen *) display->driverdata;
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129 SDL_DisplayMode mode;
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130 SDL_zero(mode);
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131
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132 // availableModes showed up in 3.2 (the iPad and later). We should only
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133 // land here for at least that version of the OS.
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134 if (!SDL_UIKit_supports_multiple_displays) {
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135 const CGRect rect = [uiscreen bounds];
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136 mode.format = SDL_PIXELFORMAT_ABGR8888;
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137 mode.w = (int) rect.size.width;
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138 mode.h = (int) rect.size.height;
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139 mode.refresh_rate = 0;
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140 mode.driverdata = NULL;
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141 SDL_AddDisplayMode(display, &mode);
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142 return;
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143 }
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144
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145 const NSArray *modes = [uiscreen availableModes];
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146 const NSUInteger mode_count = [modes count];
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147 NSUInteger i;
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148 for (i = 0; i < mode_count; i++) {
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149 UIScreenMode *uimode = (UIScreenMode *) [modes objectAtIndex:i];
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150 const CGSize size = [uimode size];
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151 mode.format = SDL_PIXELFORMAT_ABGR8888;
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152 mode.w = (int) size.width;
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153 mode.h = (int) size.height;
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154 mode.refresh_rate = 0;
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155 mode.driverdata = uimode;
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156 [uimode retain];
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157 SDL_AddDisplayMode(display, &mode);
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158 }
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159 }
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160
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161
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162 static void
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163 UIKit_AddDisplay(UIScreen *uiscreen, int w, int h)
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164 {
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165 SDL_VideoDisplay display;
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166 SDL_DisplayMode mode;
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167 SDL_zero(mode);
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168 mode.format = SDL_PIXELFORMAT_ABGR8888;
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169 mode.w = w;
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170 mode.h = h;
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171 mode.refresh_rate = 0;
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172
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173 SDL_zero(display);
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174 display.desktop_mode = mode;
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175 display.current_mode = mode;
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176
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177 [uiscreen retain];
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178 display.driverdata = uiscreen;
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179 SDL_AddVideoDisplay(&display);
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180 }
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181
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182
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183 int
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184 UIKit_VideoInit(_THIS)
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185 {
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186 _this->gl_config.driver_loaded = 1;
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187
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188 NSString *reqSysVer = @"3.2";
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189 NSString *currSysVer = [[UIDevice currentDevice] systemVersion];
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190 if ([currSysVer compare:reqSysVer options:NSNumericSearch] != NSOrderedAscending)
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191 SDL_UIKit_supports_multiple_displays = YES;
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192
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193 // If this is iPhoneOS < 3.2, all devices are one screen, 320x480 pixels.
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194 // The iPad added both a larger main screen and the ability to use
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195 // external displays.
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196 if (!SDL_UIKit_supports_multiple_displays) {
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197 // Just give 'em the whole main screen.
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198 UIScreen *uiscreen = [UIScreen mainScreen];
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199 const CGRect rect = [uiscreen bounds];
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200 UIKit_AddDisplay(uiscreen, (int)rect.size.width, (int)rect.size.height);
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201 } else {
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202 const NSArray *screens = [UIScreen screens];
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203 const NSUInteger screen_count = [screens count];
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204 NSUInteger i;
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205 for (i = 0; i < screen_count; i++) {
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206 // the main screen is the first element in the array.
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207 UIScreen *uiscreen = (UIScreen *) [screens objectAtIndex:i];
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208 const CGSize size = [[uiscreen currentMode] size];
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209 UIKit_AddDisplay(uiscreen, (int) size.width, (int) size.height);
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210 }
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211 }
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212
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213 /* We're done! */
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214 return 0;
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215 }
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216
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217 static int
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218 UIKit_SetDisplayMode(_THIS, SDL_VideoDisplay * display, SDL_DisplayMode * mode)
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219 {
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220 UIScreen *uiscreen = (UIScreen *) display->driverdata;
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221 if (!SDL_UIKit_supports_multiple_displays) {
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222 // Not on at least iPhoneOS 3.2 (versions prior to iPad).
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223 SDL_assert(mode->driverdata == NULL);
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224 } else {
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225 UIScreenMode *uimode = (UIScreenMode *) mode->driverdata;
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226 [uiscreen setCurrentMode:uimode];
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227 }
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228
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229 return 0;
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230 }
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231
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232 void
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233 UIKit_VideoQuit(_THIS)
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234 {
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235 // Release Objective-C objects, so higher level doesn't free() them.
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236 int i, j;
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237 for (i = 0; i < _this->num_displays; i++) {
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238 SDL_VideoDisplay *display = &_this->displays[i];
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239 UIScreen *uiscreen = (UIScreen *) display->driverdata;
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240 [uiscreen release];
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241 display->driverdata = NULL;
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242 for (j = 0; j < display->num_display_modes; j++) {
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243 SDL_DisplayMode *mode = &display->display_modes[j];
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244 UIScreenMode *uimode = (UIScreenMode *) mode->driverdata;
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245 if (uimode) {
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246 [uimode release];
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247 mode->driverdata = NULL;
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248 }
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249 }
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250 }
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251 }
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252
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253 /* vi: set ts=4 sw=4 expandtab: */