Mercurial > sdl-ios-xcode
annotate src/video/win32/SDL_win32modes.c @ 3100:7dc982143c06
Date: Sun, 22 Mar 2009 12:52:29 +0000
From: Luke Benstead
Subject: OpenGL 3.0 Context Creation
I've attached a patch which implements OpenGL 3.x context creation on
the latest SVN. I've added two options to SDL_GL_SetAttribute, these
are SDL_GL_CONTEXT_MAJOR_VERSION and SDL_GL_CONTEXT_MINOR_VERSION.
These default to 2 and 1 respectively. If the major version is less
than 3 then the current context creation method is used, otherwise the
appropriate new context creation function is called (depending on the
platform).
Sample code:
if (SDL_Init(SDL_INIT_VIDEO) != 0) {
printf("Unable to initialize SDL: %s\n", SDL_GetError());
return 1;
}
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3); //Without these 2 lines, SDL will create a GL 2.x context
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0);
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
SDL_Surface* screen = SDL_SetVideoMode( 640, 480, 16, SDL_OPENGL | SDL_FULLSCREEN );
I've implemented context creation on both Win32 and X and run basic
tests on both. This patch doesn't provide access to all the options
allowed by the new context creation (e.g. shared contexts, forward
compatible contexts) but they can be added pretty easily.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Tue, 24 Mar 2009 10:43:53 +0000 |
parents | 0d12e8f1de3c |
children | 7f684f249ec9 |
rev | line source |
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1 /* |
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2 SDL - Simple DirectMedia Layer |
2859 | 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 #include "SDL_config.h" |
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23 |
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24 #include "SDL_win32video.h" |
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25 |
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26 |
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27 static SDL_bool |
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28 WIN_GetDisplayMode(LPCTSTR deviceName, DWORD index, SDL_DisplayMode * mode) |
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29 { |
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30 SDL_DisplayModeData *data; |
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31 DEVMODE devmode; |
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32 HDC hdc; |
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33 |
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34 devmode.dmSize = sizeof(devmode); |
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35 devmode.dmDriverExtra = 0; |
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36 if (!EnumDisplaySettings(deviceName, index, &devmode)) { |
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37 return SDL_FALSE; |
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38 } |
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39 |
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40 data = (SDL_DisplayModeData *) SDL_malloc(sizeof(*data)); |
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41 if (!data) { |
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42 return SDL_FALSE; |
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43 } |
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44 SDL_memcpy(data->DeviceName, deviceName, sizeof(data->DeviceName)); |
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45 data->DeviceMode = devmode; |
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46 data->DeviceMode.dmFields = |
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47 (DM_BITSPERPEL | DM_PELSWIDTH | DM_PELSHEIGHT | DM_DISPLAYFREQUENCY | |
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48 DM_DISPLAYFLAGS); |
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49 |
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50 /* Fill in the mode information */ |
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51 mode->format = SDL_PIXELFORMAT_UNKNOWN; |
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52 mode->w = devmode.dmPelsWidth; |
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53 mode->h = devmode.dmPelsHeight; |
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54 mode->refresh_rate = devmode.dmDisplayFrequency; |
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55 mode->driverdata = data; |
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56 #ifdef _WIN32_WCE |
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57 /* In WinCE EnumDisplaySettings(ENUM_CURRENT_SETTINGS) doesn't take the user defined orientation |
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58 into account but GetSystemMetrixs does. */ |
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59 if(index == ENUM_CURRENT_SETTINGS) { |
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60 mode->w = GetSystemMetrics(SM_CXSCREEN); |
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61 mode->h = GetSystemMetrics(SM_CYSCREEN); |
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62 } |
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63 #endif |
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64 |
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65 /* WinCE has no GetDIBits, therefore we can't use it to get the display format */ |
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66 #ifndef _WIN32_WCE |
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67 if (index == ENUM_CURRENT_SETTINGS |
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68 && (hdc = CreateDC(deviceName, NULL, NULL, NULL)) != NULL) { |
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69 char bmi_data[sizeof(BITMAPINFOHEADER) + 256 * sizeof(RGBQUAD)]; |
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70 LPBITMAPINFO bmi; |
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71 HBITMAP hbm; |
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72 |
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73 SDL_zero(bmi_data); |
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74 bmi = (LPBITMAPINFO) bmi_data; |
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75 bmi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER); |
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76 |
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77 hbm = CreateCompatibleBitmap(hdc, 1, 1); |
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78 GetDIBits(hdc, hbm, 0, 1, NULL, bmi, DIB_RGB_COLORS); |
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79 GetDIBits(hdc, hbm, 0, 1, NULL, bmi, DIB_RGB_COLORS); |
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80 DeleteObject(hbm); |
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81 DeleteDC(hdc); |
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82 if (bmi->bmiHeader.biCompression == BI_BITFIELDS) { |
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83 switch (*(Uint32 *) bmi->bmiColors) { |
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84 case 0x00FF0000: |
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85 mode->format = SDL_PIXELFORMAT_RGB888; |
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86 break; |
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87 case 0x000000FF: |
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88 mode->format = SDL_PIXELFORMAT_BGR888; |
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89 break; |
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90 case 0xF800: |
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91 mode->format = SDL_PIXELFORMAT_RGB565; |
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92 break; |
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93 case 0x7C00: |
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94 mode->format = SDL_PIXELFORMAT_RGB555; |
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95 break; |
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96 } |
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97 } else if (bmi->bmiHeader.biBitCount == 8) { |
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98 mode->format = SDL_PIXELFORMAT_INDEX8; |
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99 } |
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100 } else |
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101 #endif /* _WIN32_WCE */ |
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102 { |
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103 |
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104 /* FIXME: Can we tell what this will be? */ |
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105 switch (devmode.dmBitsPerPel) { |
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106 case 32: |
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107 mode->format = SDL_PIXELFORMAT_RGB888; |
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108 break; |
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109 case 24: |
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110 mode->format = SDL_PIXELFORMAT_RGB24; |
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111 break; |
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112 case 16: |
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113 mode->format = SDL_PIXELFORMAT_RGB565; |
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114 break; |
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115 case 15: |
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116 mode->format = SDL_PIXELFORMAT_RGB555; |
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117 break; |
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118 case 8: |
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119 mode->format = SDL_PIXELFORMAT_INDEX8; |
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120 break; |
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121 } |
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122 } |
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123 return SDL_TRUE; |
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124 } |
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125 |
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126 static SDL_bool |
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127 WIN_AddDisplay(LPTSTR DeviceName) |
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128 { |
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129 SDL_VideoDisplay display; |
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130 SDL_DisplayData *displaydata; |
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131 SDL_DisplayMode mode; |
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132 |
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133 #ifdef DEBUG_MODES |
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134 printf("Display: %s\n", WIN_StringToUTF8(DeviceName)); |
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135 #endif |
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136 if (!WIN_GetDisplayMode(DeviceName, ENUM_CURRENT_SETTINGS, &mode)) { |
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137 return SDL_FALSE; |
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138 } |
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139 |
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140 displaydata = (SDL_DisplayData *) SDL_malloc(sizeof(*displaydata)); |
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141 if (!displaydata) { |
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142 return SDL_FALSE; |
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143 } |
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144 SDL_memcpy(displaydata->DeviceName, DeviceName, |
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145 sizeof(displaydata->DeviceName)); |
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146 |
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147 SDL_zero(display); |
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148 display.desktop_mode = mode; |
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149 display.current_mode = mode; |
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150 display.driverdata = displaydata; |
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151 SDL_AddVideoDisplay(&display); |
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152 return SDL_TRUE; |
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153 } |
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154 |
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155 void |
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156 WIN_InitModes(_THIS) |
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157 { |
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158 SDL_VideoData *data = (SDL_VideoData *) _this->driverdata; |
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159 DWORD i, j, count; |
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160 DISPLAY_DEVICE device; |
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161 |
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162 device.cb = sizeof(device); |
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163 for (i = 0;; ++i) { |
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164 TCHAR DeviceName[32]; |
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165 |
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166 if (!EnumDisplayDevices(NULL, i, &device, 0)) { |
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167 break; |
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168 } |
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169 if (!(device.StateFlags & DISPLAY_DEVICE_ATTACHED_TO_DESKTOP)) { |
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170 continue; |
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171 } |
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172 SDL_memcpy(DeviceName, device.DeviceName, sizeof(DeviceName)); |
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173 #ifdef DEBUG_MODES |
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174 printf("Device: %s\n", WIN_StringToUTF8(DeviceName)); |
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175 #endif |
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176 count = 0; |
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177 for (j = 0;; ++j) { |
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178 if (!EnumDisplayDevices(DeviceName, j, &device, 0)) { |
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179 break; |
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180 } |
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181 if (!(device.StateFlags & DISPLAY_DEVICE_ATTACHED_TO_DESKTOP)) { |
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182 continue; |
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|
183 } |
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184 count += WIN_AddDisplay(device.DeviceName); |
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185 } |
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186 if (count == 0) { |
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187 WIN_AddDisplay(DeviceName); |
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188 } |
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189 } |
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190 } |
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191 |
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|
192 void |
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193 WIN_GetDisplayModes(_THIS) |
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194 { |
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195 SDL_DisplayData *data = (SDL_DisplayData *) SDL_CurrentDisplay.driverdata; |
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196 DWORD i; |
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197 SDL_DisplayMode mode; |
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198 |
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199 for (i = 0;; ++i) { |
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200 if (!WIN_GetDisplayMode(data->DeviceName, i, &mode)) { |
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201 break; |
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202 } |
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203 if (!SDL_AddDisplayMode(_this->current_display, &mode)) { |
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204 SDL_free(mode.driverdata); |
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205 } |
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206 } |
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207 } |
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208 |
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|
209 int |
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|
210 WIN_SetDisplayMode(_THIS, SDL_DisplayMode * mode) |
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211 { |
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|
212 SDL_DisplayModeData *data = (SDL_DisplayModeData *) mode->driverdata; |
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213 LONG status; |
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214 |
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215 #ifdef _WIN32_WCE |
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216 /* TODO: implement correctly. |
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217 On my Asus MyPAL, if I execute the code below |
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218 I get DISP_CHANGE_BADFLAGS and the Titlebar of the fullscreen window stays |
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219 visible ... (SDL_RaiseWindow() would fix that one)*/ |
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220 return 0; |
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|
221 #endif |
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222 |
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|
223 status = |
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224 ChangeDisplaySettingsEx(data->DeviceName, &data->DeviceMode, NULL, |
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225 CDS_FULLSCREEN, NULL); |
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226 if (status == DISP_CHANGE_SUCCESSFUL) { |
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227 return 0; |
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228 } else { |
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229 const char *reason = "Unknown reason"; |
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230 switch (status) { |
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231 case DISP_CHANGE_BADFLAGS: |
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232 reason = "DISP_CHANGE_BADFLAGS"; |
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233 break; |
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234 case DISP_CHANGE_BADMODE: |
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235 reason = "DISP_CHANGE_BADMODE"; |
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236 break; |
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237 case DISP_CHANGE_BADPARAM: |
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238 reason = "DISP_CHANGE_BADPARAM"; |
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239 break; |
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240 case DISP_CHANGE_FAILED: |
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241 reason = "DISP_CHANGE_FAILED"; |
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242 break; |
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243 } |
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244 SDL_SetError("ChangeDisplaySettingsEx() failed: %s", reason); |
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245 return -1; |
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246 } |
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247 } |
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248 |
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249 void |
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250 WIN_QuitModes(_THIS) |
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251 { |
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252 ChangeDisplaySettingsEx(NULL, NULL, NULL, 0, NULL); |
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253 } |
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254 |
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255 /* vi: set ts=4 sw=4 expandtab: */ |