4 * Freeglut state query methods.
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6 * Copyright (c) 1999-2000 Pawel W. Olszta. All Rights Reserved.
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7 * Written by Pawel W. Olszta, <olszta@sourceforge.net>
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8 * Creation date: Thu Dec 16 1999
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10 * Permission is hereby granted, free of charge, to any person obtaining a
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11 * copy of this software and associated documentation files (the "Software"),
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12 * to deal in the Software without restriction, including without limitation
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13 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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14 * and/or sell copies of the Software, and to permit persons to whom the
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15 * Software is furnished to do so, subject to the following conditions:
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17 * The above copyright notice and this permission notice shall be included
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18 * in all copies or substantial portions of the Software.
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20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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21 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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23 * PAWEL W. OLSZTA BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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24 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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25 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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28 #include <GL/freeglut.h>
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29 #include "freeglut_internal.h"
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32 * TODO BEFORE THE STABLE RELEASE:
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34 * glutGet() -- X11 tests passed, but check if all enums
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35 * handled (what about Win32?)
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36 * glutDeviceGet() -- X11 tests passed, but check if all enums
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37 * handled (what about Win32?)
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38 * glutGetModifiers() -- OK, but could also remove the limitation
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39 * glutLayerGet() -- what about GLUT_NORMAL_DAMAGED?
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41 * The fail-on-call policy will help adding the most needed things imho.
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44 extern int fgPlatformGlutGet ( GLenum eWhat );
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45 extern int fgPlatformGlutDeviceGet ( GLenum eWhat );
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46 extern int fgPlatformGlutLayerGet ( GLenum eWhat );
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48 /* -- LOCAL DEFINITIONS ---------------------------------------------------- */
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50 /* -- PRIVATE FUNCTIONS ---------------------------------------------------- */
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52 #if TARGET_HOST_POSIX_X11
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54 * Queries the GL context about some attributes
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56 static int fghGetConfig( int attribute )
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58 int returnValue = 0;
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59 int result; /* Not checked */
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61 if( fgStructure.CurrentWindow )
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62 result = glXGetFBConfigAttrib( fgDisplay.Display,
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63 *(fgStructure.CurrentWindow->Window.FBConfig),
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70 static int fgPlatformGlutGet ( GLenum eWhat )
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77 * The window/context specific queries are handled mostly by
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80 case GLUT_WINDOW_NUM_SAMPLES:
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81 #ifdef GLX_VERSION_1_3
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82 glGetIntegerv(GL_SAMPLES, &nsamples);
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87 * The rest of GLX queries under X are general enough to use a macro to
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90 # define GLX_QUERY(a,b) case a: return fghGetConfig( b );
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92 GLX_QUERY( GLUT_WINDOW_RGBA, GLX_RGBA );
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93 GLX_QUERY( GLUT_WINDOW_DOUBLEBUFFER, GLX_DOUBLEBUFFER );
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94 GLX_QUERY( GLUT_WINDOW_BUFFER_SIZE, GLX_BUFFER_SIZE );
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95 GLX_QUERY( GLUT_WINDOW_STENCIL_SIZE, GLX_STENCIL_SIZE );
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96 GLX_QUERY( GLUT_WINDOW_DEPTH_SIZE, GLX_DEPTH_SIZE );
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97 GLX_QUERY( GLUT_WINDOW_RED_SIZE, GLX_RED_SIZE );
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98 GLX_QUERY( GLUT_WINDOW_GREEN_SIZE, GLX_GREEN_SIZE );
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99 GLX_QUERY( GLUT_WINDOW_BLUE_SIZE, GLX_BLUE_SIZE );
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100 GLX_QUERY( GLUT_WINDOW_ALPHA_SIZE, GLX_ALPHA_SIZE );
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101 GLX_QUERY( GLUT_WINDOW_ACCUM_RED_SIZE, GLX_ACCUM_RED_SIZE );
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102 GLX_QUERY( GLUT_WINDOW_ACCUM_GREEN_SIZE, GLX_ACCUM_GREEN_SIZE );
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103 GLX_QUERY( GLUT_WINDOW_ACCUM_BLUE_SIZE, GLX_ACCUM_BLUE_SIZE );
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104 GLX_QUERY( GLUT_WINDOW_ACCUM_ALPHA_SIZE, GLX_ACCUM_ALPHA_SIZE );
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105 GLX_QUERY( GLUT_WINDOW_STEREO, GLX_STEREO );
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109 /* Colormap size is handled in a bit different way than all the rest */
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110 case GLUT_WINDOW_COLORMAP_SIZE:
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111 if( (fghGetConfig( GLX_RGBA )) || (fgStructure.CurrentWindow == NULL) )
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114 * We've got a RGBA visual, so there is no colormap at all.
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115 * The other possibility is that we have no current window set.
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121 const GLXFBConfig * fbconfig =
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122 fgStructure.CurrentWindow->Window.FBConfig;
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124 XVisualInfo * visualInfo =
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125 glXGetVisualFromFBConfig( fgDisplay.Display, *fbconfig );
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127 const int result = visualInfo->visual->map_entries;
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135 * Those calls are somewhat similiar, as they use XGetWindowAttributes()
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138 case GLUT_WINDOW_X:
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139 case GLUT_WINDOW_Y:
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140 case GLUT_WINDOW_BORDER_WIDTH:
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141 case GLUT_WINDOW_HEADER_HEIGHT:
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146 if( fgStructure.CurrentWindow == NULL )
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149 XTranslateCoordinates(
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151 fgStructure.CurrentWindow->Window.Handle,
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152 fgDisplay.RootWindow,
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157 case GLUT_WINDOW_X: return x;
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158 case GLUT_WINDOW_Y: return y;
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163 XTranslateCoordinates(
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165 fgStructure.CurrentWindow->Window.Handle,
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166 w, 0, 0, &x, &y, &w);
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170 case GLUT_WINDOW_BORDER_WIDTH: return x;
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171 case GLUT_WINDOW_HEADER_HEIGHT: return y;
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175 case GLUT_WINDOW_WIDTH:
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176 case GLUT_WINDOW_HEIGHT:
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178 XWindowAttributes winAttributes;
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180 if( fgStructure.CurrentWindow == NULL )
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182 XGetWindowAttributes(
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184 fgStructure.CurrentWindow->Window.Handle,
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189 case GLUT_WINDOW_WIDTH: return winAttributes.width ;
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190 case GLUT_WINDOW_HEIGHT: return winAttributes.height ;
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194 /* I do not know yet if there will be a fgChooseVisual() function for Win32 */
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195 case GLUT_DISPLAY_MODE_POSSIBLE:
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197 /* We should not have to call fgChooseFBConfig again here. */
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198 GLXFBConfig * fbconfig;
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201 fbconfig = fgChooseFBConfig(NULL);
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203 if (fbconfig == NULL)
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216 /* This is system-dependant */
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217 case GLUT_WINDOW_FORMAT_ID:
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218 if( fgStructure.CurrentWindow == NULL )
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221 return fghGetConfig( GLX_VISUAL_ID );
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224 fgWarning( "glutGet(): missing enum handle %d", eWhat );
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230 static int fgPlatformGlutDeviceGet ( GLenum eWhat )
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234 case GLUT_HAS_KEYBOARD:
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236 * X11 has a core keyboard by definition, although it can
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237 * be present as a virtual/dummy keyboard. For now, there
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238 * is no reliable way to tell if a real keyboard is present.
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242 /* X11 has a mouse by definition */
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243 case GLUT_HAS_MOUSE:
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246 case GLUT_NUM_MOUSE_BUTTONS:
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247 /* We should be able to pass NULL when the last argument is zero,
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248 * but at least one X server has a bug where this causes a segfault.
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250 * In XFree86/Xorg servers, a mouse wheel is seen as two buttons
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251 * rather than an Axis; "freeglut_main.c" expects this when
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252 * checking for a wheel event.
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256 int nbuttons = XGetPointerMapping(fgDisplay.Display, &map,0);
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261 fgWarning( "glutDeviceGet(): missing enum handle %d", eWhat );
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265 /* And now -- the failure. */
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269 int fgPlatformGlutLayerGet( GLenum eWhat )
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272 * This is easy as layers are not implemented ;-)
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274 * XXX Can we merge the UNIX/X11 and WIN32 sections? Or
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275 * XXX is overlay support planned?
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279 case GLUT_OVERLAY_POSSIBLE:
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282 case GLUT_LAYER_IN_USE:
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283 return GLUT_NORMAL;
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285 case GLUT_HAS_OVERLAY:
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288 case GLUT_TRANSPARENT_INDEX:
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290 * Return just anything, which is always defined as zero
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296 case GLUT_NORMAL_DAMAGED:
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297 /* XXX Actually I do not know. Maybe. */
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300 case GLUT_OVERLAY_DAMAGED:
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304 fgWarning( "glutLayerGet(): missing enum handle %d", eWhat );
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308 /* And fail. That's good. Programs do love failing. */
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316 /* -- INTERFACE FUNCTIONS -------------------------------------------------- */
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319 * General settings assignment method
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321 void FGAPIENTRY glutSetOption( GLenum eWhat, int value )
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323 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSetOption" );
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326 * XXX In chronological code add order. (WHY in that order?)
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330 case GLUT_INIT_WINDOW_X:
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331 fgState.Position.X = (GLint)value;
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334 case GLUT_INIT_WINDOW_Y:
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335 fgState.Position.Y = (GLint)value;
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338 case GLUT_INIT_WINDOW_WIDTH:
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339 fgState.Size.X = (GLint)value;
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342 case GLUT_INIT_WINDOW_HEIGHT:
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343 fgState.Size.Y = (GLint)value;
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346 case GLUT_INIT_DISPLAY_MODE:
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347 fgState.DisplayMode = (unsigned int)value;
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350 case GLUT_ACTION_ON_WINDOW_CLOSE:
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351 fgState.ActionOnWindowClose = value;
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354 case GLUT_RENDERING_CONTEXT:
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355 fgState.UseCurrentContext =
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356 ( value == GLUT_USE_CURRENT_CONTEXT ) ? GL_TRUE : GL_FALSE;
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359 case GLUT_DIRECT_RENDERING:
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360 fgState.DirectContext = value;
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363 case GLUT_WINDOW_CURSOR:
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364 if( fgStructure.CurrentWindow != NULL )
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365 fgStructure.CurrentWindow->State.Cursor = value;
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369 fgState.AuxiliaryBufferNumber = value;
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372 case GLUT_MULTISAMPLE:
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373 fgState.SampleNumber = value;
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377 fgWarning( "glutSetOption(): missing enum handle %d", eWhat );
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383 * General settings query method
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385 int FGAPIENTRY glutGet( GLenum eWhat )
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389 case GLUT_INIT_STATE:
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390 return fgState.Initialised;
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392 case GLUT_ELAPSED_TIME:
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393 return fgElapsedTime();
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396 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutGet" );
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398 /* XXX In chronological code add order. (WHY in that order?) */
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401 /* Following values are stored in fgState and fgDisplay global structures */
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402 case GLUT_SCREEN_WIDTH: return fgDisplay.ScreenWidth ;
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403 case GLUT_SCREEN_HEIGHT: return fgDisplay.ScreenHeight ;
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404 case GLUT_SCREEN_WIDTH_MM: return fgDisplay.ScreenWidthMM ;
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405 case GLUT_SCREEN_HEIGHT_MM: return fgDisplay.ScreenHeightMM;
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406 case GLUT_INIT_WINDOW_X: return fgState.Position.Use ?
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407 fgState.Position.X : -1 ;
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408 case GLUT_INIT_WINDOW_Y: return fgState.Position.Use ?
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409 fgState.Position.Y : -1 ;
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410 case GLUT_INIT_WINDOW_WIDTH: return fgState.Size.Use ?
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411 fgState.Size.X : -1 ;
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412 case GLUT_INIT_WINDOW_HEIGHT: return fgState.Size.Use ?
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413 fgState.Size.Y : -1 ;
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414 case GLUT_INIT_DISPLAY_MODE: return fgState.DisplayMode ;
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415 case GLUT_INIT_MAJOR_VERSION: return fgState.MajorVersion ;
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416 case GLUT_INIT_MINOR_VERSION: return fgState.MinorVersion ;
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417 case GLUT_INIT_FLAGS: return fgState.ContextFlags ;
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418 case GLUT_INIT_PROFILE: return fgState.ContextProfile ;
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420 /* The window structure queries */
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421 case GLUT_WINDOW_PARENT:
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422 if( fgStructure.CurrentWindow == NULL ) return 0;
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423 if( fgStructure.CurrentWindow->Parent == NULL ) return 0;
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424 return fgStructure.CurrentWindow->Parent->ID;
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426 case GLUT_WINDOW_NUM_CHILDREN:
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427 if( fgStructure.CurrentWindow == NULL )
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429 return fgListLength( &fgStructure.CurrentWindow->Children );
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431 case GLUT_WINDOW_CURSOR:
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432 if( fgStructure.CurrentWindow == NULL )
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434 return fgStructure.CurrentWindow->State.Cursor;
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436 case GLUT_MENU_NUM_ITEMS:
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437 if( fgStructure.CurrentMenu == NULL )
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439 return fgListLength( &fgStructure.CurrentMenu->Entries );
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441 case GLUT_ACTION_ON_WINDOW_CLOSE:
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442 return fgState.ActionOnWindowClose;
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444 case GLUT_VERSION :
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445 return VERSION_MAJOR * 10000 + VERSION_MINOR * 100 + VERSION_PATCH;
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447 case GLUT_RENDERING_CONTEXT:
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448 return fgState.UseCurrentContext ? GLUT_USE_CURRENT_CONTEXT
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449 : GLUT_CREATE_NEW_CONTEXT;
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451 case GLUT_DIRECT_RENDERING:
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452 return fgState.DirectContext;
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454 case GLUT_FULL_SCREEN:
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455 return fgStructure.CurrentWindow->State.IsFullscreen;
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458 return fgState.AuxiliaryBufferNumber;
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460 case GLUT_MULTISAMPLE:
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461 return fgState.SampleNumber;
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464 return fgPlatformGlutGet ( eWhat );
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471 * Returns various device information.
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473 int FGAPIENTRY glutDeviceGet( GLenum eWhat )
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475 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutDeviceGet" );
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477 /* XXX WARNING: we are mostly lying in this function. */
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480 case GLUT_HAS_JOYSTICK:
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481 return fgJoystickDetect ();
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483 case GLUT_OWNS_JOYSTICK:
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484 return fgState.JoysticksInitialised;
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486 case GLUT_JOYSTICK_POLL_RATE:
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487 return fgStructure.CurrentWindow ? fgStructure.CurrentWindow->State.JoystickPollRate : 0;
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489 /* XXX The following two are only for Joystick 0 but this is an improvement */
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490 case GLUT_JOYSTICK_BUTTONS:
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491 return glutJoystickGetNumButtons ( 0 );
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493 case GLUT_JOYSTICK_AXES:
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494 return glutJoystickGetNumAxes ( 0 );
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496 case GLUT_HAS_DIAL_AND_BUTTON_BOX:
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497 return fgInputDeviceDetect ();
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499 case GLUT_NUM_DIALS:
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500 if ( fgState.InputDevsInitialised ) return 8;
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503 case GLUT_NUM_BUTTON_BOX_BUTTONS:
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506 case GLUT_HAS_SPACEBALL:
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507 return fgHasSpaceball();
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509 case GLUT_HAS_TABLET:
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512 case GLUT_NUM_SPACEBALL_BUTTONS:
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513 return fgSpaceballNumButtons();
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515 case GLUT_NUM_TABLET_BUTTONS:
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518 case GLUT_DEVICE_IGNORE_KEY_REPEAT:
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519 return fgStructure.CurrentWindow ? fgStructure.CurrentWindow->State.IgnoreKeyRepeat : 0;
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521 case GLUT_DEVICE_KEY_REPEAT:
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522 return fgState.KeyRepeat;
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525 return fgPlatformGlutDeviceGet ( eWhat );
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528 /* And now -- the failure. */
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533 * This should return the current state of ALT, SHIFT and CTRL keys.
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535 int FGAPIENTRY glutGetModifiers( void )
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537 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutGetModifiers" );
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538 if( fgState.Modifiers == INVALID_MODIFIERS )
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540 fgWarning( "glutGetModifiers() called outside an input callback" );
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544 return fgState.Modifiers;
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548 * Return the state of the GLUT API overlay subsystem. A misery ;-)
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550 int FGAPIENTRY glutLayerGet( GLenum eWhat )
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552 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutLayerGet" );
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555 * This is easy as layers are not implemented ;-)
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557 * XXX Can we merge the UNIX/X11 and WIN32 sections? Or
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558 * XXX is overlay support planned?
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564 return fgPlatformGlutLayerGet( eWhat );
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567 /* And fail. That's good. Programs do love failing. */
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571 int * FGAPIENTRY glutGetModeValues(GLenum eWhat, int * size)
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575 #if TARGET_HOST_POSIX_X11
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577 GLXFBConfig * fbconfigArray; /* Array of FBConfigs */
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578 int fbconfigArraySize; /* Number of FBConfigs in the array */
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579 int attribute_name = 0;
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582 FREEGLUT_EXIT_IF_NOT_INITIALISED("glutGetModeValues");
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589 #if TARGET_HOST_POSIX_X11
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591 case GLUT_MULTISAMPLE:
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593 attributes[0] = GLX_BUFFER_SIZE;
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594 attributes[1] = GLX_DONT_CARE;
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600 FBConfigs are now sorted by increasing number of auxiliary
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601 buffers. We want at least one buffer.
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603 attributes[2] = GLX_AUX_BUFFERS;
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605 attributes[4] = None;
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607 attribute_name = GLX_AUX_BUFFERS;
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612 case GLUT_MULTISAMPLE:
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613 attributes[2] = GLX_AUX_BUFFERS;
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614 attributes[3] = GLX_DONT_CARE;
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615 attributes[4] = GLX_SAMPLE_BUFFERS;
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618 FBConfigs are now sorted by increasing number of samples per
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619 pixel. We want at least one sample.
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621 attributes[6] = GLX_SAMPLES;
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623 attributes[8] = None;
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625 attribute_name = GLX_SAMPLES;
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630 fbconfigArray = glXChooseFBConfig(fgDisplay.Display,
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633 &fbconfigArraySize);
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635 if (fbconfigArray != NULL)
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638 int result; /* Returned by glXGetFBConfigAttrib. Not checked. */
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639 int previous_value;
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642 temp_array = malloc(sizeof(int) * fbconfigArraySize);
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643 previous_value = 0;
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645 for (i = 0; i < fbconfigArraySize; i++)
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649 result = glXGetFBConfigAttrib(fgDisplay.Display,
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653 if (value > previous_value)
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655 temp_array[*size] = value;
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656 previous_value = value;
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661 array = malloc(sizeof(int) * (*size));
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662 for (i = 0; i < *size; i++)
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664 array[i] = temp_array[i];
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668 XFree(fbconfigArray);
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681 /*** END OF FILE ***/
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