+++ /dev/null
-/*
- * 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.
- */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#define G_LOG_DOMAIN "freeglut-state"
-
-#include "../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_UNIX_X11
-/*
- * Queries the GL context about some attributes
- */
-static int fghGetConfig( int attribute )
-{
- int returnValue ;
-
- /*
- * Return nothing if there is no current window set
- */
- if( fgStructure.Window == NULL )
- return( 0 );
-
- /*
- * glXGetConfig should work fine
- */
- glXGetConfig( fgDisplay.Display, fgStructure.Window->Window.VisualInfo, attribute, &returnValue );
-
-
- /*
- * Have the query results returned
- */
- return ( returnValue ) ;
-}
-#endif
-
-/* -- INTERFACE FUNCTIONS -------------------------------------------------- */
-
-/*
- * General settings assignment method
- */
-void FGAPIENTRY glutSetOption( GLenum eWhat, int value )
-{
- freeglut_assert_ready;
-
- /*
- * Check what is the caller querying for. In chronological code add 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_WINDOW_CURSOR:
- if( fgStructure.Window != NULL ) fgStructure.Window->State.Cursor = value ;
- break ;
-
- default:
- /*
- * Just have it reported, so that we can see what needs to be implemented
- */
- fgWarning( "glutSetOption(): missing enum handle %i\n", eWhat );
- break;
- }
-}
-
-/*
- * General settings query method
- */
-int FGAPIENTRY glutGet( GLenum eWhat )
-{
- int returnValue ;
- GLboolean boolValue ;
-
- if ( eWhat == GLUT_INIT_STATE )
- return ( fgState.Time.Set ) ;
-
- freeglut_assert_ready;
-
- /*
- * Check what is the caller querying for. In chronological code add order.
- */
- switch( eWhat )
- {
- case GLUT_ELAPSED_TIME:
- /*
- * This is easy and nicely portable, as we are using GLib...
- */
- return( fgElapsedTime() );
-
- /*
- * 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.X );
- case GLUT_INIT_WINDOW_Y: return( fgState.Position.Y );
- case GLUT_INIT_WINDOW_WIDTH: return( fgState.Size.X );
- case GLUT_INIT_WINDOW_HEIGHT: return( fgState.Size.Y );
- case GLUT_INIT_DISPLAY_MODE: return( fgState.DisplayMode );
-
- /*
- * The window/context specific queries are handled mostly by fghGetConfig().
- */
- case GLUT_WINDOW_NUM_SAMPLES:
- /*
- * Multisampling. Return what I know about multisampling.
- */
- return( 0 );
-
-#if TARGET_HOST_UNIX_X11
- /*
- * 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:
- /*
- * Check for the visual type
- */
- if( (fghGetConfig( GLX_RGBA )) || (fgStructure.Window == 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 );
- }
-
- /*
- * Otherwise return the number of entries in the colormap
- */
- return( fgStructure.Window->Window.VisualInfo->visual->map_entries );
-
- /*
- * Those calls are somewhat similiar, as they use XGetWindowAttributes() function
- */
- case GLUT_WINDOW_X:
- case GLUT_WINDOW_Y:
- case GLUT_WINDOW_WIDTH:
- case GLUT_WINDOW_HEIGHT:
- case GLUT_WINDOW_BORDER_WIDTH :
- case GLUT_WINDOW_HEADER_HEIGHT :
- {
- XWindowAttributes winAttributes;
-
- /*
- * Return zero if there is no current window set
- */
- if( fgStructure.Window == NULL )
- return( 0 );
-
- /*
- * Grab the current window's attributes now
- */
- XGetWindowAttributes(
- fgDisplay.Display,
- fgStructure.Window->Window.Handle,
- &winAttributes
- );
-
- /*
- * See which window attribute to return
- */
- switch ( eWhat )
- {
- case GLUT_WINDOW_X: return winAttributes.x ;
- case GLUT_WINDOW_Y: return winAttributes.y ;
- case GLUT_WINDOW_WIDTH: return winAttributes.width ;
- case GLUT_WINDOW_HEIGHT: return winAttributes.height ;
- case GLUT_WINDOW_BORDER_WIDTH : return winAttributes.border_width ;
- case GLUT_WINDOW_HEADER_HEIGHT : return winAttributes.border_width * 3 ; /* a kludge for now */
- }
- }
-
- /*
- * I do not know yet if there will be a fgChooseVisual() function for Win32
- */
- case GLUT_DISPLAY_MODE_POSSIBLE:
- /*
- * Check if the current display mode is possible
- */
- return( fgChooseVisual() == NULL ? 0 : 1 );
-
- /*
- * This is system-dependant
- */
- case GLUT_WINDOW_FORMAT_ID:
- /*
- * Return the visual ID, if there is a current window naturally:
- */
- if( fgStructure.Window == NULL )
- return( 0 );
-
- return( fgStructure.Window->Window.VisualInfo->visualid );
-
-#elif TARGET_HOST_WIN32
-
- /*
- * Handle the OpenGL inquiries
- */
- case GLUT_WINDOW_RGBA:
- glGetBooleanv ( GL_RGBA_MODE, &boolValue ) ; /* True if color buffers store RGBA */
- returnValue = boolValue ? 1 : 0 ;
- return ( returnValue ) ;
- case GLUT_WINDOW_DOUBLEBUFFER:
- glGetBooleanv ( GL_DOUBLEBUFFER, &boolValue ) ; /* True if front and back buffers exist */
- returnValue = boolValue ? 1 : 0 ;
- return ( returnValue ) ;
- case GLUT_WINDOW_STEREO:
- glGetBooleanv ( GL_STEREO, &boolValue ) ; /* True if left and right buffers exist */
- returnValue = boolValue ? 1 : 0 ;
- return ( returnValue ) ;
-
- case GLUT_WINDOW_RED_SIZE:
- glGetIntegerv ( GL_RED_BITS, &returnValue ) ; /* Number of bits per red component in color buffers */
- return ( returnValue ) ;
- case GLUT_WINDOW_GREEN_SIZE:
- glGetIntegerv ( GL_GREEN_BITS, &returnValue ) ; /* Number of bits per green component in color buffers */
- return ( returnValue ) ;
- case GLUT_WINDOW_BLUE_SIZE:
- glGetIntegerv ( GL_BLUE_BITS, &returnValue ) ; /* Number of bits per blue component in color buffers */
- return ( returnValue ) ;
- case GLUT_WINDOW_ALPHA_SIZE:
- glGetIntegerv ( GL_ALPHA_BITS, &returnValue ) ; /* Number of bits per alpha component in color buffers */
- return ( returnValue ) ;
- case GLUT_WINDOW_ACCUM_RED_SIZE:
- glGetIntegerv ( GL_ACCUM_RED_BITS, &returnValue ) ; /* Number of bits per red component in the accumulation buffer */
- return ( returnValue ) ;
- case GLUT_WINDOW_ACCUM_GREEN_SIZE:
- glGetIntegerv ( GL_ACCUM_GREEN_BITS, &returnValue ) ; /* Number of bits per green component in the accumulation buffer */
- return ( returnValue ) ;
- case GLUT_WINDOW_ACCUM_BLUE_SIZE:
- glGetIntegerv ( GL_ACCUM_BLUE_BITS, &returnValue ) ; /* Number of bits per blue component in the accumulation buffer */
- return ( returnValue ) ;
- case GLUT_WINDOW_ACCUM_ALPHA_SIZE:
- glGetIntegerv ( GL_ACCUM_ALPHA_BITS, &returnValue ) ; /* Number of bits per alpha component in the accumulation buffer */
- return ( returnValue ) ;
- case GLUT_WINDOW_DEPTH_SIZE:
- glGetIntegerv ( GL_DEPTH_BITS, &returnValue ) ; /* Number of depth-buffer bitplanes */
- return ( returnValue ) ;
-
- case GLUT_WINDOW_BUFFER_SIZE:
- returnValue = 1 ; /* ????? */
- return ( returnValue ) ;
- case GLUT_WINDOW_STENCIL_SIZE:
- returnValue = 0 ; /* ????? */
- return ( returnValue ) ;
-
- /*
- * Window position and size
- */
- 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 Linux; since
- * platform independence is a virtue for "freeglut", we decided to break with GLUT's
- * behaviour.
- * Under Linux, 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 Linux:
- * - 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;
-
- /*
- * Check if there is a window to be queried for dimensions:
- */
- freeglut_return_val_if_fail( fgStructure.Window != NULL, 0 );
-
- /*
- * We need to call GetWindowRect() first...
- * (this returns the pixel coordinates of the outside of the window)
- */
- GetWindowRect( fgStructure.Window->Window.Handle, &winRect );
-
- /*
- * ...then we've got to correct the results we've just received...
- */
- if (fgStructure.GameMode != fgStructure.Window &&
- fgStructure.Window->Parent == NULL )
- {
- winRect.left += GetSystemMetrics( SM_CXSIZEFRAME );
- winRect.right -= GetSystemMetrics( SM_CXSIZEFRAME );
- winRect.top += GetSystemMetrics( SM_CYSIZEFRAME ) + GetSystemMetrics( SM_CYCAPTION );
- winRect.bottom -= GetSystemMetrics( SM_CYSIZEFRAME );
- }
-
- /*
- * ...and finally return the caller the desired value:
- */
- 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 :
- return ( GetSystemMetrics( SM_CXSIZEFRAME ) ) ;
-
- case GLUT_WINDOW_HEADER_HEIGHT :
- return ( GetSystemMetrics( SM_CYCAPTION ) ) ;
-
- case GLUT_DISPLAY_MODE_POSSIBLE:
- /*
- * Check if the current display mode is possible
- */
- return( fgSetupPixelFormat( fgStructure.Window, TRUE, PFD_MAIN_PLANE ) );
-
- case GLUT_WINDOW_FORMAT_ID:
- /*
- * Return the pixel format of the current window
- */
- if( fgStructure.Window != NULL )
- return( GetPixelFormat( fgStructure.Window->Window.Device ) );
-
- /*
- * If the current window does not exist, fail:
- */
- return( 0 );
-
-#endif
-
- /*
- * The window structure queries
- */
- case GLUT_WINDOW_PARENT:
- /*
- * Return the ID number of current window's parent, if any
- */
- if( fgStructure.Window == NULL ) return( 0 );
- if( fgStructure.Window->Parent == NULL ) return( 0 );
-
- return( fgStructure.Window->Parent->ID );
-
- case GLUT_WINDOW_NUM_CHILDREN:
- /*
- * Return the number of children attached to the current window
- */
- if( fgStructure.Window == NULL )
- return( 0 );
-
- return( fgListLength( &fgStructure.Window->Children ) );
-
- case GLUT_WINDOW_CURSOR:
- /*
- * Return the currently selected window cursor
- */
- if( fgStructure.Window == NULL )
- return( 0 );
-
- return( fgStructure.Window->State.Cursor );
-
- case GLUT_MENU_NUM_ITEMS:
- /*
- * Return the number of menu entries in the current menu
- */
- if( fgStructure.Menu == NULL )
- return( 0 );
-
- return( fgListLength( &fgStructure.Menu->Entries ) );
-
- case GLUT_ACTION_ON_WINDOW_CLOSE:
- return fgState.ActionOnWindowClose;
-
- case GLUT_VERSION:
- return VERSION_MAJOR * 10000 + VERSION_MINOR * 100 + VERSION_PATCH;
-
- default:
- /*
- * Just have it reported, so that we can see what needs to be implemented
- */
- fgWarning( "glutGet(): missing enum handle %i\n", eWhat );
- break;
- }
-
- /*
- * If nothing happens, then we are in deep trouble...
- */
- return( -1 );
-}
-
-/*
- * Returns various device information.
- */
-int FGAPIENTRY glutDeviceGet( GLenum eWhat )
-{
- freeglut_assert_ready;
-
- /*
- * See why are we bothered...
- *
- * WARNING: we are mostly lying in this function.
- */
- switch( eWhat )
- {
- case GLUT_HAS_KEYBOARD:
- /*
- * We always have a keyboard present on PC machines...
- */
- return( TRUE );
-
-#if TARGET_HOST_UNIX_X11
-
- case GLUT_HAS_MOUSE:
- /*
- * Hey, my Atari 65XE hasn't had a mouse!
- */
- return( TRUE );
-
- case GLUT_NUM_MOUSE_BUTTONS:
- /*
- * Return the number of mouse buttons available. This is a big guess.
- */
- return( 3 );
-
-#elif TARGET_HOST_WIN32
-
- case GLUT_HAS_MOUSE:
- /*
- * The Windows can be booted without a mouse.
- * It would be nice to have this reported.
- */
- return( GetSystemMetrics( SM_MOUSEPRESENT ) );
-
- case GLUT_NUM_MOUSE_BUTTONS:
- /*
- * We are much more fortunate under Win32 about this...
- */
- return( GetSystemMetrics( SM_CMOUSEBUTTONS ) );
-
-#endif
-
- case GLUT_JOYSTICK_POLL_RATE:
- case GLUT_HAS_JOYSTICK:
- case GLUT_JOYSTICK_BUTTONS:
- case GLUT_JOYSTICK_AXES:
- /*
- * WARNING: THIS IS A BIG LIE!
- */
- return( 0 );
-
- case GLUT_HAS_SPACEBALL:
- case GLUT_HAS_DIAL_AND_BUTTON_BOX:
- case GLUT_HAS_TABLET:
- /*
- * Sounds cool. And unuseful.
- */
- return( FALSE );
-
- case GLUT_NUM_SPACEBALL_BUTTONS:
- case GLUT_NUM_BUTTON_BOX_BUTTONS:
- case GLUT_NUM_DIALS:
- case GLUT_NUM_TABLET_BUTTONS:
- /*
- * Zero is not the answer. Zero is the question. Continuum is the answer.
- */
- return( 0 );
-
- case GLUT_DEVICE_IGNORE_KEY_REPEAT:
- /*
- * Return what we think about the key auto repeat settings
- */
- return( fgState.IgnoreKeyRepeat );
-
- case GLUT_DEVICE_KEY_REPEAT:
- /*
- * WARNING: THIS IS A BIG LIE!
- */
- return( GLUT_KEY_REPEAT_DEFAULT );
-
- default:
- /*
- * Complain.
- */
- fgWarning( "glutDeviceGet(): missing enum handle %i\n", eWhat );
- break;
- }
-
- /*
- * And now -- the failure.
- */
- return( -1 );
-}
-
-/*
- * This should return the current state of ALT, SHIFT and CTRL keys.
- */
-int FGAPIENTRY glutGetModifiers( void )
-{
- /*
- * Fail if there is no current window or called outside an input callback
- */
- if( fgStructure.Window == NULL )
- return( 0 );
-
- if( fgStructure.Window->State.Modifiers == 0xffffffff )
- {
- fgWarning( "glutGetModifiers() called outside an input callback" );
- return( 0 );
- }
-
- /*
- * Return the current modifiers state otherwise
- */
- return( fgStructure.Window->State.Modifiers );
-}
-
-/*
- * Return the state of the GLUT API overlay subsystem. A misery ;-)
- */
-int FGAPIENTRY glutLayerGet( GLenum eWhat )
-{
- freeglut_assert_ready;
-
- /*
- * This is easy as layers are not implemented ;-)
- */
- switch( eWhat )
- {
-
-#if TARGET_HOST_UNIX_X11
-
- case GLUT_OVERLAY_POSSIBLE:
- /*
- * Nope, overlays are not possible.
- */
- return( FALSE );
-
- case GLUT_LAYER_IN_USE:
- /*
- * The normal plane is always in use
- */
- return( GLUT_NORMAL );
-
- case GLUT_HAS_OVERLAY:
- /*
- * No window is allowed to have an overlay
- */
- return( FALSE );
-
- case GLUT_TRANSPARENT_INDEX:
- /*
- * Return just anything, which is always defined as zero
- */
- return( 0 );
-
- case GLUT_NORMAL_DAMAGED:
- /*
- * Actually I do not know. Maybe.
- */
- return( FALSE );
-
- case GLUT_OVERLAY_DAMAGED:
- /*
- * Return minus one to mark that no layer is in use
- */
- return( -1 );
-
-#elif TARGET_HOST_WIN32
-
- case GLUT_OVERLAY_POSSIBLE:
- /*
- * Check if an overlay display mode is possible
- */
- return( fgSetupPixelFormat( fgStructure.Window, TRUE, PFD_OVERLAY_PLANE ) );
-
- case GLUT_LAYER_IN_USE:
- /*
- * The normal plane is always in use
- */
- return( GLUT_NORMAL );
-
- case GLUT_HAS_OVERLAY:
- /*
- * No window is allowed to have an overlay
- */
- return( FALSE );
-
- case GLUT_TRANSPARENT_INDEX:
- /*
- * Return just anything, which is always defined as zero
- */
- return( 0 );
-
- case GLUT_NORMAL_DAMAGED:
- /*
- * Actually I do not know. Maybe.
- */
- return( FALSE );
-
- case GLUT_OVERLAY_DAMAGED:
- /*
- * Return minus one to mark that no layer is in use
- */
- return( -1 );
-#endif
-
- default:
- /*
- * Complain to the user about the obvious bug
- */
- fgWarning( "glutLayerGet(): missing enum handle %i\n", eWhat );
- break;
- }
-
- /*
- * And fail. That's good. Programs do love failing.
- */
- return( -1 );
-}
-
-/*** END OF FILE ***/
projects / freeglut / blobdiff