freeglut_state.c
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上传日期:2022-01-07
资源大小:3028k
文件大小:26k
- /*
- * freeglut_state.c
- *
- * Freeglut state query methods.
- *
- * Copyright (c) 1999-2000 Pawel W. Olszta. All Rights Reserved.
- * Written by Pawel W. Olszta, <olszta@sourceforge.net>
- * Creation date: Thu Dec 16 1999
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * PAWEL W. OLSZTA BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
- * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
- #include <GL/freeglut.h>
- #include "freeglut_internal.h"
- /*
- * TODO BEFORE THE STABLE RELEASE:
- *
- * glutGet() -- X11 tests passed, but check if all enums
- * handled (what about Win32?)
- * glutDeviceGet() -- X11 tests passed, but check if all enums
- * handled (what about Win32?)
- * glutGetModifiers() -- OK, but could also remove the limitation
- * glutLayerGet() -- what about GLUT_NORMAL_DAMAGED?
- *
- * The fail-on-call policy will help adding the most needed things imho.
- */
- /* -- LOCAL DEFINITIONS ---------------------------------------------------- */
- /* -- PRIVATE FUNCTIONS ---------------------------------------------------- */
- #if TARGET_HOST_POSIX_X11
- /*
- * Queries the GL context about some attributes
- */
- static int fghGetConfig( int attribute )
- {
- int returnValue = 0;
- int result; /* Not checked */
- if( fgStructure.CurrentWindow )
- result = glXGetFBConfigAttrib( fgDisplay.Display,
- *(fgStructure.CurrentWindow->Window.FBConfig),
- attribute,
- &returnValue );
- return returnValue;
- }
- #endif
- /* Check if the window is in full screen state. */
- static int fghCheckFullScreen(void)
- {
- #if TARGET_HOST_POSIX_X11
- return fgStructure.CurrentWindow->State.IsFullscreen;
- #else
- return 0;
- #endif
- }
- /* -- INTERFACE FUNCTIONS -------------------------------------------------- */
- /*
- * General settings assignment method
- */
- void FGAPIENTRY glutSetOption( GLenum eWhat, int value )
- {
- FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSetOption" );
- /*
- * XXX In chronological code add order. (WHY in that order?)
- */
- switch( eWhat )
- {
- case GLUT_INIT_WINDOW_X:
- fgState.Position.X = (GLint)value;
- break;
- case GLUT_INIT_WINDOW_Y:
- fgState.Position.Y = (GLint)value;
- break;
- case GLUT_INIT_WINDOW_WIDTH:
- fgState.Size.X = (GLint)value;
- break;
- case GLUT_INIT_WINDOW_HEIGHT:
- fgState.Size.Y = (GLint)value;
- break;
- case GLUT_INIT_DISPLAY_MODE:
- fgState.DisplayMode = (unsigned int)value;
- break;
- case GLUT_ACTION_ON_WINDOW_CLOSE:
- fgState.ActionOnWindowClose = value;
- break;
- case GLUT_RENDERING_CONTEXT:
- fgState.UseCurrentContext =
- ( value == GLUT_USE_CURRENT_CONTEXT ) ? GL_TRUE : GL_FALSE;
- break;
- case GLUT_DIRECT_RENDERING:
- fgState.DirectContext = value;
- break;
- case GLUT_WINDOW_CURSOR:
- if( fgStructure.CurrentWindow != NULL )
- fgStructure.CurrentWindow->State.Cursor = value;
- break;
- case GLUT_AUX:
- fgState.AuxiliaryBufferNumber = value;
- break;
- case GLUT_MULTISAMPLE:
- fgState.SampleNumber = value;
- break;
- default:
- fgWarning( "glutSetOption(): missing enum handle %d", eWhat );
- break;
- }
- }
- #if TARGET_HOST_MS_WINDOWS
- /* The following include file is available from SGI but is not standard:
- * #include <GL/wglext.h>
- * So we copy the necessary parts out of it to support the multisampling query
- */
- #define WGL_SAMPLES_ARB 0x2042
- #endif
- /*
- * General settings query method
- */
- int FGAPIENTRY glutGet( GLenum eWhat )
- {
- #if TARGET_HOST_MS_WINDOWS
- int returnValue ;
- GLboolean boolValue ;
- #endif
- int nsamples = 0;
- switch (eWhat)
- {
- case GLUT_INIT_STATE:
- return fgState.Initialised;
- case GLUT_ELAPSED_TIME:
- return fgElapsedTime();
- }
- FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutGet" );
- /* XXX In chronological code add order. (WHY in that order?) */
- switch( eWhat )
- {
- /* Following values are stored in fgState and fgDisplay global structures */
- case GLUT_SCREEN_WIDTH: return fgDisplay.ScreenWidth ;
- case GLUT_SCREEN_HEIGHT: return fgDisplay.ScreenHeight ;
- case GLUT_SCREEN_WIDTH_MM: return fgDisplay.ScreenWidthMM ;
- case GLUT_SCREEN_HEIGHT_MM: return fgDisplay.ScreenHeightMM;
- case GLUT_INIT_WINDOW_X: return fgState.Position.Use ?
- fgState.Position.X : -1 ;
- case GLUT_INIT_WINDOW_Y: return fgState.Position.Use ?
- fgState.Position.Y : -1 ;
- case GLUT_INIT_WINDOW_WIDTH: return fgState.Size.Use ?
- fgState.Size.X : -1 ;
- case GLUT_INIT_WINDOW_HEIGHT: return fgState.Size.Use ?
- fgState.Size.Y : -1 ;
- case GLUT_INIT_DISPLAY_MODE: return fgState.DisplayMode ;
- case GLUT_INIT_MAJOR_VERSION: return fgState.MajorVersion ;
- case GLUT_INIT_MINOR_VERSION: return fgState.MinorVersion ;
- case GLUT_INIT_FLAGS: return fgState.ContextFlags ;
- case GLUT_INIT_PROFILE: return fgState.ContextProfile ;
- #if TARGET_HOST_POSIX_X11
- /*
- * The window/context specific queries are handled mostly by
- * fghGetConfig().
- */
- case GLUT_WINDOW_NUM_SAMPLES:
- #ifdef GLX_VERSION_1_3
- glGetIntegerv(GL_SAMPLES, &nsamples);
- #endif
- return nsamples;
- /*
- * The rest of GLX queries under X are general enough to use a macro to
- * check them
- */
- # define GLX_QUERY(a,b) case a: return fghGetConfig( b );
- GLX_QUERY( GLUT_WINDOW_RGBA, GLX_RGBA );
- GLX_QUERY( GLUT_WINDOW_DOUBLEBUFFER, GLX_DOUBLEBUFFER );
- GLX_QUERY( GLUT_WINDOW_BUFFER_SIZE, GLX_BUFFER_SIZE );
- GLX_QUERY( GLUT_WINDOW_STENCIL_SIZE, GLX_STENCIL_SIZE );
- GLX_QUERY( GLUT_WINDOW_DEPTH_SIZE, GLX_DEPTH_SIZE );
- GLX_QUERY( GLUT_WINDOW_RED_SIZE, GLX_RED_SIZE );
- GLX_QUERY( GLUT_WINDOW_GREEN_SIZE, GLX_GREEN_SIZE );
- GLX_QUERY( GLUT_WINDOW_BLUE_SIZE, GLX_BLUE_SIZE );
- GLX_QUERY( GLUT_WINDOW_ALPHA_SIZE, GLX_ALPHA_SIZE );
- GLX_QUERY( GLUT_WINDOW_ACCUM_RED_SIZE, GLX_ACCUM_RED_SIZE );
- GLX_QUERY( GLUT_WINDOW_ACCUM_GREEN_SIZE, GLX_ACCUM_GREEN_SIZE );
- GLX_QUERY( GLUT_WINDOW_ACCUM_BLUE_SIZE, GLX_ACCUM_BLUE_SIZE );
- GLX_QUERY( GLUT_WINDOW_ACCUM_ALPHA_SIZE, GLX_ACCUM_ALPHA_SIZE );
- GLX_QUERY( GLUT_WINDOW_STEREO, GLX_STEREO );
- # undef GLX_QUERY
- /* Colormap size is handled in a bit different way than all the rest */
- case GLUT_WINDOW_COLORMAP_SIZE:
- if( (fghGetConfig( GLX_RGBA )) || (fgStructure.CurrentWindow == NULL) )
- {
- /*
- * We've got a RGBA visual, so there is no colormap at all.
- * The other possibility is that we have no current window set.
- */
- return 0;
- }
- else
- {
- const GLXFBConfig * fbconfig =
- fgStructure.CurrentWindow->Window.FBConfig;
- XVisualInfo * visualInfo =
- glXGetVisualFromFBConfig( fgDisplay.Display, *fbconfig );
- const int result = visualInfo->visual->map_entries;
- XFree(visualInfo);
- return result;
- }
- /*
- * Those calls are somewhat similiar, as they use XGetWindowAttributes()
- * function
- */
- case GLUT_WINDOW_X:
- case GLUT_WINDOW_Y:
- case GLUT_WINDOW_BORDER_WIDTH:
- case GLUT_WINDOW_HEADER_HEIGHT:
- {
- int x, y;
- Window w;
- if( fgStructure.CurrentWindow == NULL )
- return 0;
- XTranslateCoordinates(
- fgDisplay.Display,
- fgStructure.CurrentWindow->Window.Handle,
- fgDisplay.RootWindow,
- 0, 0, &x, &y, &w);
- switch ( eWhat )
- {
- case GLUT_WINDOW_X: return x;
- case GLUT_WINDOW_Y: return y;
- }
- if ( w == 0 )
- return 0;
- XTranslateCoordinates(
- fgDisplay.Display,
- fgStructure.CurrentWindow->Window.Handle,
- w, 0, 0, &x, &y, &w);
- switch ( eWhat )
- {
- case GLUT_WINDOW_BORDER_WIDTH: return x;
- case GLUT_WINDOW_HEADER_HEIGHT: return y;
- }
- }
- case GLUT_WINDOW_WIDTH:
- case GLUT_WINDOW_HEIGHT:
- {
- XWindowAttributes winAttributes;
- if( fgStructure.CurrentWindow == NULL )
- return 0;
- XGetWindowAttributes(
- fgDisplay.Display,
- fgStructure.CurrentWindow->Window.Handle,
- &winAttributes
- );
- switch ( eWhat )
- {
- case GLUT_WINDOW_WIDTH: return winAttributes.width ;
- case GLUT_WINDOW_HEIGHT: return winAttributes.height ;
- }
- }
- /* I do not know yet if there will be a fgChooseVisual() function for Win32 */
- case GLUT_DISPLAY_MODE_POSSIBLE:
- {
- /* We should not have to call fgChooseFBConfig again here. */
- GLXFBConfig * fbconfig;
- int isPossible;
- fbconfig = fgChooseFBConfig();
- if (fbconfig == NULL)
- {
- isPossible = 0;
- }
- else
- {
- isPossible = 1;
- XFree(fbconfig);
- }
- return isPossible;
- }
- /* This is system-dependant */
- case GLUT_WINDOW_FORMAT_ID:
- if( fgStructure.CurrentWindow == NULL )
- return 0;
- return fghGetConfig( GLX_VISUAL_ID );
- #elif TARGET_HOST_MS_WINDOWS
- case GLUT_WINDOW_NUM_SAMPLES:
- glGetIntegerv(WGL_SAMPLES_ARB, &nsamples);
- return nsamples;
- /* Handle the OpenGL inquiries */
- case GLUT_WINDOW_RGBA:
- #if defined(_WIN32_WCE)
- boolValue = (GLboolean)0; /* WinCE doesn't support this feature */
- #else
- glGetBooleanv ( GL_RGBA_MODE, &boolValue );
- returnValue = boolValue ? 1 : 0;
- #endif
- return returnValue;
- case GLUT_WINDOW_DOUBLEBUFFER:
- #if defined(_WIN32_WCE)
- boolValue = (GLboolean)0; /* WinCE doesn't support this feature */
- #else
- glGetBooleanv ( GL_DOUBLEBUFFER, &boolValue );
- returnValue = boolValue ? 1 : 0;
- #endif
- return returnValue;
- case GLUT_WINDOW_STEREO:
- #if defined(_WIN32_WCE)
- boolValue = (GLboolean)0; /* WinCE doesn't support this feature */
- #else
- glGetBooleanv ( GL_STEREO, &boolValue );
- returnValue = boolValue ? 1 : 0;
- #endif
- return returnValue;
- case GLUT_WINDOW_RED_SIZE:
- glGetIntegerv ( GL_RED_BITS, &returnValue );
- return returnValue;
- case GLUT_WINDOW_GREEN_SIZE:
- glGetIntegerv ( GL_GREEN_BITS, &returnValue );
- return returnValue;
- case GLUT_WINDOW_BLUE_SIZE:
- glGetIntegerv ( GL_BLUE_BITS, &returnValue );
- return returnValue;
- case GLUT_WINDOW_ALPHA_SIZE:
- glGetIntegerv ( GL_ALPHA_BITS, &returnValue );
- return returnValue;
- case GLUT_WINDOW_ACCUM_RED_SIZE:
- #if defined(_WIN32_WCE)
- returnValue = 0; /* WinCE doesn't support this feature */
- #else
- glGetIntegerv ( GL_ACCUM_RED_BITS, &returnValue );
- #endif
- return returnValue;
- case GLUT_WINDOW_ACCUM_GREEN_SIZE:
- #if defined(_WIN32_WCE)
- returnValue = 0; /* WinCE doesn't support this feature */
- #else
- glGetIntegerv ( GL_ACCUM_GREEN_BITS, &returnValue );
- #endif
- return returnValue;
- case GLUT_WINDOW_ACCUM_BLUE_SIZE:
- #if defined(_WIN32_WCE)
- returnValue = 0; /* WinCE doesn't support this feature */
- #else
- glGetIntegerv ( GL_ACCUM_BLUE_BITS, &returnValue );
- #endif
- return returnValue;
- case GLUT_WINDOW_ACCUM_ALPHA_SIZE:
- #if defined(_WIN32_WCE)
- returnValue = 0; /* WinCE doesn't support this feature */
- #else
- glGetIntegerv ( GL_ACCUM_ALPHA_BITS, &returnValue );
- #endif
- return returnValue;
- case GLUT_WINDOW_DEPTH_SIZE:
- glGetIntegerv ( GL_DEPTH_BITS, &returnValue );
- return returnValue;
- case GLUT_WINDOW_BUFFER_SIZE:
- returnValue = 1 ; /* ????? */
- return returnValue;
- case GLUT_WINDOW_STENCIL_SIZE:
- returnValue = 0 ; /* ????? */
- return returnValue;
- case GLUT_WINDOW_X:
- case GLUT_WINDOW_Y:
- case GLUT_WINDOW_WIDTH:
- case GLUT_WINDOW_HEIGHT:
- {
- /*
- * There is considerable confusion about the "right thing to
- * do" concerning window size and position. GLUT itself is
- * not consistent between Windows and UNIX/X11; since
- * platform independence is a virtue for "freeglut", we
- * decided to break with GLUT's behaviour.
- *
- * Under UNIX/X11, it is apparently not possible to get the
- * window border sizes in order to subtract them off the
- * window's initial position until some time after the window
- * has been created. Therefore we decided on the following
- * behaviour, both under Windows and under UNIX/X11:
- * - When you create a window with position (x,y) and size
- * (w,h), the upper left hand corner of the outside of the
- * window is at (x,y) and the size of the drawable area is
- * (w,h).
- * - When you query the size and position of the window--as
- * is happening here for Windows--"freeglut" will return
- * the size of the drawable area--the (w,h) that you
- * specified when you created the window--and the coordinates
- * of the upper left hand corner of the drawable
- * area--which is NOT the (x,y) you specified.
- */
- RECT winRect;
- freeglut_return_val_if_fail( fgStructure.CurrentWindow != NULL, 0 );
- /*
- * We need to call GetWindowRect() first...
- * (this returns the pixel coordinates of the outside of the window)
- */
- GetWindowRect( fgStructure.CurrentWindow->Window.Handle, &winRect );
- /* ...then we've got to correct the results we've just received... */
- #if !defined(_WIN32_WCE)
- if ( ( fgStructure.GameModeWindow != fgStructure.CurrentWindow ) && ( fgStructure.CurrentWindow->Parent == NULL ) &&
- ( ! fgStructure.CurrentWindow->IsMenu ) )
- {
- winRect.left += GetSystemMetrics( SM_CXSIZEFRAME );
- winRect.right -= GetSystemMetrics( SM_CXSIZEFRAME );
- winRect.top += GetSystemMetrics( SM_CYSIZEFRAME ) + GetSystemMetrics( SM_CYCAPTION );
- winRect.bottom -= GetSystemMetrics( SM_CYSIZEFRAME );
- }
- #endif /* !defined(_WIN32_WCE) */
- switch( eWhat )
- {
- case GLUT_WINDOW_X: return winRect.left ;
- case GLUT_WINDOW_Y: return winRect.top ;
- case GLUT_WINDOW_WIDTH: return winRect.right - winRect.left;
- case GLUT_WINDOW_HEIGHT: return winRect.bottom - winRect.top;
- }
- }
- break;
- case GLUT_WINDOW_BORDER_WIDTH :
- #if defined(_WIN32_WCE)
- return 0;
- #else
- return GetSystemMetrics( SM_CXSIZEFRAME );
- #endif /* !defined(_WIN32_WCE) */
- case GLUT_WINDOW_HEADER_HEIGHT :
- #if defined(_WIN32_WCE)
- return 0;
- #else
- return GetSystemMetrics( SM_CYCAPTION );
- #endif /* defined(_WIN32_WCE) */
- case GLUT_DISPLAY_MODE_POSSIBLE:
- #if defined(_WIN32_WCE)
- return 0;
- #else
- return fgSetupPixelFormat( fgStructure.CurrentWindow, GL_TRUE,
- PFD_MAIN_PLANE );
- #endif /* defined(_WIN32_WCE) */
- case GLUT_WINDOW_FORMAT_ID:
- #if !defined(_WIN32_WCE)
- if( fgStructure.CurrentWindow != NULL )
- return GetPixelFormat( fgStructure.CurrentWindow->Window.Device );
- #endif /* defined(_WIN32_WCE) */
- return 0;
- #endif
- /* The window structure queries */
- case GLUT_WINDOW_PARENT:
- if( fgStructure.CurrentWindow == NULL ) return 0;
- if( fgStructure.CurrentWindow->Parent == NULL ) return 0;
- return fgStructure.CurrentWindow->Parent->ID;
- case GLUT_WINDOW_NUM_CHILDREN:
- if( fgStructure.CurrentWindow == NULL )
- return 0;
- return fgListLength( &fgStructure.CurrentWindow->Children );
- case GLUT_WINDOW_CURSOR:
- if( fgStructure.CurrentWindow == NULL )
- return 0;
- return fgStructure.CurrentWindow->State.Cursor;
- case GLUT_MENU_NUM_ITEMS:
- if( fgStructure.CurrentMenu == NULL )
- return 0;
- return fgListLength( &fgStructure.CurrentMenu->Entries );
- case GLUT_ACTION_ON_WINDOW_CLOSE:
- return fgState.ActionOnWindowClose;
- case GLUT_VERSION :
- return VERSION_MAJOR * 10000 + VERSION_MINOR * 100 + VERSION_PATCH;
- case GLUT_RENDERING_CONTEXT:
- return fgState.UseCurrentContext ? GLUT_USE_CURRENT_CONTEXT
- : GLUT_CREATE_NEW_CONTEXT;
- case GLUT_DIRECT_RENDERING:
- return fgState.DirectContext;
- case GLUT_FULL_SCREEN:
- return fghCheckFullScreen();
- case GLUT_AUX:
- return fgState.AuxiliaryBufferNumber;
- case GLUT_MULTISAMPLE:
- return fgState.SampleNumber;
- default:
- fgWarning( "glutGet(): missing enum handle %d", eWhat );
- break;
- }
- return -1;
- }
- /*
- * Returns various device information.
- */
- int FGAPIENTRY glutDeviceGet( GLenum eWhat )
- {
- FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutDeviceGet" );
- /* XXX WARNING: we are mostly lying in this function. */
- switch( eWhat )
- {
- case GLUT_HAS_KEYBOARD:
- /*
- * Win32 is assumed a keyboard, and this cannot be queried,
- * except for WindowsCE.
- *
- * X11 has a core keyboard by definition, although it can
- * be present as a virtual/dummy keyboard. For now, there
- * is no reliable way to tell if a real keyboard is present.
- */
- #if defined(_WIN32_CE)
- return ( GetKeyboardStatus() & KBDI_KEYBOARD_PRESENT ) ? 1 : 0;
- # if FREEGLUT_LIB_PRAGMAS
- # pragma comment (lib,"Kbdui.lib")
- # endif
- #else
- return 1;
- #endif
- #if TARGET_HOST_POSIX_X11
- /* X11 has a mouse by definition */
- case GLUT_HAS_MOUSE:
- return 1 ;
- case GLUT_NUM_MOUSE_BUTTONS:
- /* We should be able to pass NULL when the last argument is zero,
- * but at least one X server has a bug where this causes a segfault.
- *
- * In XFree86/Xorg servers, a mouse wheel is seen as two buttons
- * rather than an Axis; "freeglut_main.c" expects this when
- * checking for a wheel event.
- */
- {
- unsigned char map;
- int nbuttons = XGetPointerMapping(fgDisplay.Display, &map,0);
- return nbuttons;
- }
- #elif TARGET_HOST_MS_WINDOWS
- case GLUT_HAS_MOUSE:
- /*
- * MS Windows can be booted without a mouse.
- */
- return GetSystemMetrics( SM_MOUSEPRESENT );
- case GLUT_NUM_MOUSE_BUTTONS:
- # if defined(_WIN32_WCE)
- return 1;
- # else
- return GetSystemMetrics( SM_CMOUSEBUTTONS );
- # endif
- #endif
- case GLUT_HAS_JOYSTICK:
- return fgJoystickDetect ();
- case GLUT_OWNS_JOYSTICK:
- return fgState.JoysticksInitialised;
- case GLUT_JOYSTICK_POLL_RATE:
- return fgStructure.CurrentWindow ? fgStructure.CurrentWindow->State.JoystickPollRate : 0;
- /* XXX The following two are only for Joystick 0 but this is an improvement */
- case GLUT_JOYSTICK_BUTTONS:
- return glutJoystickGetNumButtons ( 0 );
- case GLUT_JOYSTICK_AXES:
- return glutJoystickGetNumAxes ( 0 );
- case GLUT_HAS_DIAL_AND_BUTTON_BOX:
- return fgInputDeviceDetect ();
- case GLUT_NUM_DIALS:
- if ( fgState.InputDevsInitialised ) return 8;
- return 0;
-
- case GLUT_NUM_BUTTON_BOX_BUTTONS:
- return 0;
- case GLUT_HAS_SPACEBALL:
- return fgHasSpaceball();
- case GLUT_HAS_TABLET:
- return 0;
- case GLUT_NUM_SPACEBALL_BUTTONS:
- return fgSpaceballNumButtons();
- case GLUT_NUM_TABLET_BUTTONS:
- return 0;
- case GLUT_DEVICE_IGNORE_KEY_REPEAT:
- return fgStructure.CurrentWindow ? fgStructure.CurrentWindow->State.IgnoreKeyRepeat : 0;
- case GLUT_DEVICE_KEY_REPEAT:
- return fgState.KeyRepeat;
- default:
- fgWarning( "glutDeviceGet(): missing enum handle %d", eWhat );
- break;
- }
- /* And now -- the failure. */
- return -1;
- }
- /*
- * This should return the current state of ALT, SHIFT and CTRL keys.
- */
- int FGAPIENTRY glutGetModifiers( void )
- {
- FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutGetModifiers" );
- if( fgState.Modifiers == INVALID_MODIFIERS )
- {
- fgWarning( "glutGetModifiers() called outside an input callback" );
- return 0;
- }
- return fgState.Modifiers;
- }
- /*
- * Return the state of the GLUT API overlay subsystem. A misery ;-)
- */
- int FGAPIENTRY glutLayerGet( GLenum eWhat )
- {
- FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutLayerGet" );
- /*
- * This is easy as layers are not implemented ;-)
- *
- * XXX Can we merge the UNIX/X11 and WIN32 sections? Or
- * XXX is overlay support planned?
- */
- switch( eWhat )
- {
- #if TARGET_HOST_POSIX_X11
- case GLUT_OVERLAY_POSSIBLE:
- return 0;
- case GLUT_LAYER_IN_USE:
- return GLUT_NORMAL;
- case GLUT_HAS_OVERLAY:
- return 0;
- case GLUT_TRANSPARENT_INDEX:
- /*
- * Return just anything, which is always defined as zero
- *
- * XXX HUH?
- */
- return 0;
- case GLUT_NORMAL_DAMAGED:
- /* XXX Actually I do not know. Maybe. */
- return 0;
- case GLUT_OVERLAY_DAMAGED:
- return -1;
- #elif TARGET_HOST_MS_WINDOWS
- case GLUT_OVERLAY_POSSIBLE:
- /* return fgSetupPixelFormat( fgStructure.CurrentWindow, GL_TRUE,
- PFD_OVERLAY_PLANE ); */
- return 0 ;
- case GLUT_LAYER_IN_USE:
- return GLUT_NORMAL;
- case GLUT_HAS_OVERLAY:
- return 0;
- case GLUT_TRANSPARENT_INDEX:
- /*
- * Return just anything, which is always defined as zero
- *
- * XXX HUH?
- */
- return 0;
- case GLUT_NORMAL_DAMAGED:
- /* XXX Actually I do not know. Maybe. */
- return 0;
- case GLUT_OVERLAY_DAMAGED:
- return -1;
- #endif
- default:
- fgWarning( "glutLayerGet(): missing enum handle %d", eWhat );
- break;
- }
- /* And fail. That's good. Programs do love failing. */
- return -1;
- }
- int * FGAPIENTRY glutGetModeValues(GLenum eWhat, int * size)
- {
- int * array;
- #if TARGET_HOST_POSIX_X11
- int attributes[9];
- GLXFBConfig * fbconfigArray; /* Array of FBConfigs */
- int fbconfigArraySize; /* Number of FBConfigs in the array */
- int attribute_name = 0;
- #endif
- FREEGLUT_EXIT_IF_NOT_INITIALISED("glutGetModeValues");
- array = NULL;
- *size = 0;
- switch (eWhat)
- {
- #if TARGET_HOST_POSIX_X11
- case GLUT_AUX:
- case GLUT_MULTISAMPLE:
- attributes[0] = GLX_BUFFER_SIZE;
- attributes[1] = GLX_DONT_CARE;
- switch (eWhat)
- {
- case GLUT_AUX:
- /*
- FBConfigs are now sorted by increasing number of auxiliary
- buffers. We want at least one buffer.
- */
- attributes[2] = GLX_AUX_BUFFERS;
- attributes[3] = 1;
- attributes[4] = None;
- attribute_name = GLX_AUX_BUFFERS;
- break;
- case GLUT_MULTISAMPLE:
- attributes[2] = GLX_AUX_BUFFERS;
- attributes[3] = GLX_DONT_CARE;
- attributes[4] = GLX_SAMPLE_BUFFERS;
- attributes[5] = 1;
- /*
- FBConfigs are now sorted by increasing number of samples per
- pixel. We want at least one sample.
- */
- attributes[6] = GLX_SAMPLES;
- attributes[7] = 1;
- attributes[8] = None;
- attribute_name = GLX_SAMPLES;
- break;
- }
- fbconfigArray = glXChooseFBConfig(fgDisplay.Display,
- fgDisplay.Screen,
- attributes,
- &fbconfigArraySize);
- if (fbconfigArray != NULL)
- {
- int * temp_array;
- int result; /* Returned by glXGetFBConfigAttrib. Not checked. */
- int previous_value;
- int i;
- temp_array = malloc(sizeof(int) * fbconfigArraySize);
- previous_value = 0;
- for (i = 0; i < fbconfigArraySize; i++)
- {
- int value;
- result = glXGetFBConfigAttrib(fgDisplay.Display,
- fbconfigArray[i],
- attribute_name,
- &value);
- if (value > previous_value)
- {
- temp_array[*size] = value;
- previous_value = value;
- (*size)++;
- }
- }
- array = malloc(sizeof(int) * (*size));
- for (i = 0; i < *size; i++)
- {
- array[i] = temp_array[i];
- }
- free(temp_array);
- XFree(fbconfigArray);
- }
- break;
- #endif
- default:
- break;
- }
- return array;
- }
- /*** END OF FILE ***/