fe2a9753bb
git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@89 7f0cb862-5218-0410-a997-914c9d46530a
705 lines
21 KiB
C
705 lines
21 KiB
C
/*
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* freeglut_state.c
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*
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* Freeglut state query methods.
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*
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* Copyright (c) 1999-2000 Pawel W. Olszta. All Rights Reserved.
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* Written by Pawel W. Olszta, <olszta@sourceforge.net>
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* Creation date: Thu Dec 16 1999
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* PAWEL W. OLSZTA BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#define G_LOG_DOMAIN "freeglut-state"
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#include "../include/GL/freeglut.h"
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#include "freeglut_internal.h"
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/*
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* TODO BEFORE THE STABLE RELEASE:
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*
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* glutGet() -- X11 tests passed, but check if all enums handled (what about Win32?)
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* glutDeviceGet() -- X11 tests passed, but check if all enums handled (what about Win32?)
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* glutGetModifiers() -- OK, but could also remove the limitation
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* glutLayerGet() -- what about GLUT_NORMAL_DAMAGED?
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*
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* The fail-on-call policy will help adding the most needed things imho.
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*/
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/* -- LOCAL DEFINITIONS ---------------------------------------------------- */
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/* -- PRIVATE FUNCTIONS ---------------------------------------------------- */
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#if TARGET_HOST_UNIX_X11
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/*
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* Queries the GL context about some attributes
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*/
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static int fghGetConfig( int attribute )
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{
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int returnValue ;
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/*
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* Return nothing if there is no current window set
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*/
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if( fgStructure.Window == NULL )
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return( 0 );
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/*
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* glXGetConfig should work fine
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*/
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glXGetConfig( fgDisplay.Display, fgStructure.Window->Window.VisualInfo, attribute, &returnValue );
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/*
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* Have the query results returned
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*/
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return ( returnValue ) ;
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}
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#endif
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/* -- INTERFACE FUNCTIONS -------------------------------------------------- */
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/*
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* General settings assignment method
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*/
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void FGAPIENTRY glutSetOption( GLenum eWhat, int value )
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{
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freeglut_assert_ready;
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/*
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* Check what is the caller querying for. In chronological code add order.
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*/
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switch( eWhat )
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{
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case GLUT_INIT_WINDOW_X: fgState.Position.X = (GLint)value ;
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break ;
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case GLUT_INIT_WINDOW_Y: fgState.Position.Y = (GLint)value ;
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break ;
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case GLUT_INIT_WINDOW_WIDTH: fgState.Size.X = (GLint)value ;
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break ;
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case GLUT_INIT_WINDOW_HEIGHT: fgState.Size.Y = (GLint)value ;
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break ;
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case GLUT_INIT_DISPLAY_MODE: fgState.DisplayMode = (unsigned int)value ;
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break ;
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case GLUT_ACTION_ON_WINDOW_CLOSE: fgState.ActionOnWindowClose = value ;
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break ;
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case GLUT_WINDOW_CURSOR:
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if( fgStructure.Window != NULL ) fgStructure.Window->State.Cursor = value ;
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break ;
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default:
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/*
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* Just have it reported, so that we can see what needs to be implemented
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*/
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fgWarning( "glutSetOption(): missing enum handle %i\n", eWhat );
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break;
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}
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}
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/*
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* General settings query method
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*/
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int FGAPIENTRY glutGet( GLenum eWhat )
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{
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int returnValue ;
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GLboolean boolValue ;
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if ( eWhat == GLUT_INIT_STATE )
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return ( fgState.Time.Set ) ;
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freeglut_assert_ready;
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/*
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* Check what is the caller querying for. In chronological code add order.
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*/
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switch( eWhat )
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{
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case GLUT_ELAPSED_TIME:
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/*
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* This is easy and nicely portable, as we are using GLib...
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*/
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return( fgElapsedTime() );
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/*
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* Following values are stored in fgState and fgDisplay global structures
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*/
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case GLUT_SCREEN_WIDTH: return( fgDisplay.ScreenWidth );
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case GLUT_SCREEN_HEIGHT: return( fgDisplay.ScreenHeight );
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case GLUT_SCREEN_WIDTH_MM: return( fgDisplay.ScreenWidthMM );
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case GLUT_SCREEN_HEIGHT_MM: return( fgDisplay.ScreenHeightMM );
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case GLUT_INIT_WINDOW_X: return( fgState.Position.X );
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case GLUT_INIT_WINDOW_Y: return( fgState.Position.Y );
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case GLUT_INIT_WINDOW_WIDTH: return( fgState.Size.X );
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case GLUT_INIT_WINDOW_HEIGHT: return( fgState.Size.Y );
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case GLUT_INIT_DISPLAY_MODE: return( fgState.DisplayMode );
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/*
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* The window/context specific queries are handled mostly by fghGetConfig().
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*/
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case GLUT_WINDOW_NUM_SAMPLES:
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/*
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* Multisampling. Return what I know about multisampling.
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*/
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return( 0 );
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#if TARGET_HOST_UNIX_X11
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/*
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* The rest of GLX queries under X are general enough to use a macro to check them
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*/
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# define GLX_QUERY(a,b) case a: return( fghGetConfig( b ) );
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GLX_QUERY( GLUT_WINDOW_RGBA, GLX_RGBA );
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GLX_QUERY( GLUT_WINDOW_DOUBLEBUFFER, GLX_DOUBLEBUFFER );
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GLX_QUERY( GLUT_WINDOW_BUFFER_SIZE, GLX_BUFFER_SIZE );
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GLX_QUERY( GLUT_WINDOW_STENCIL_SIZE, GLX_STENCIL_SIZE );
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GLX_QUERY( GLUT_WINDOW_DEPTH_SIZE, GLX_DEPTH_SIZE );
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GLX_QUERY( GLUT_WINDOW_RED_SIZE, GLX_RED_SIZE );
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GLX_QUERY( GLUT_WINDOW_GREEN_SIZE, GLX_GREEN_SIZE );
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GLX_QUERY( GLUT_WINDOW_BLUE_SIZE, GLX_BLUE_SIZE );
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GLX_QUERY( GLUT_WINDOW_ALPHA_SIZE, GLX_ALPHA_SIZE );
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GLX_QUERY( GLUT_WINDOW_ACCUM_RED_SIZE, GLX_ACCUM_RED_SIZE );
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GLX_QUERY( GLUT_WINDOW_ACCUM_GREEN_SIZE, GLX_ACCUM_GREEN_SIZE );
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GLX_QUERY( GLUT_WINDOW_ACCUM_BLUE_SIZE, GLX_ACCUM_BLUE_SIZE );
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GLX_QUERY( GLUT_WINDOW_ACCUM_ALPHA_SIZE, GLX_ACCUM_ALPHA_SIZE );
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GLX_QUERY( GLUT_WINDOW_STEREO, GLX_STEREO );
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# undef GLX_QUERY
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/*
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* Colormap size is handled in a bit different way than all the rest
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*/
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case GLUT_WINDOW_COLORMAP_SIZE:
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/*
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* Check for the visual type
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*/
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if( (fghGetConfig( GLX_RGBA )) || (fgStructure.Window == NULL) )
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{
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/*
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* We've got a RGBA visual, so there is no colormap at all.
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* The other possibility is that we have no current window set.
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*/
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return( 0 );
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}
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/*
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* Otherwise return the number of entries in the colormap
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*/
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return( fgStructure.Window->Window.VisualInfo->visual->map_entries );
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/*
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* Those calls are somewhat similiar, as they use XGetWindowAttributes() function
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*/
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case GLUT_WINDOW_X:
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case GLUT_WINDOW_Y:
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case GLUT_WINDOW_WIDTH:
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case GLUT_WINDOW_HEIGHT:
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case GLUT_WINDOW_BORDER_WIDTH :
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case GLUT_WINDOW_HEADER_HEIGHT :
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{
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XWindowAttributes winAttributes;
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/*
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* Return zero if there is no current window set
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*/
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if( fgStructure.Window == NULL )
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return( 0 );
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/*
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* Grab the current window's attributes now
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*/
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XGetWindowAttributes(
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fgDisplay.Display,
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fgStructure.Window->Window.Handle,
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&winAttributes
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);
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/*
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* See which window attribute to return
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*/
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switch ( eWhat )
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{
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case GLUT_WINDOW_X: return winAttributes.x ;
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case GLUT_WINDOW_Y: return winAttributes.y ;
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case GLUT_WINDOW_WIDTH: return winAttributes.width ;
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case GLUT_WINDOW_HEIGHT: return winAttributes.height ;
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case GLUT_WINDOW_BORDER_WIDTH : return winAttributes.border_width ;
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case GLUT_WINDOW_HEADER_HEIGHT : return winAttributes.border_width * 3 ; /* a kludge for now */
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}
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}
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/*
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* I do not know yet if there will be a fgChooseVisual() function for Win32
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*/
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case GLUT_DISPLAY_MODE_POSSIBLE:
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/*
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* Check if the current display mode is possible
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*/
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return( fgChooseVisual() == NULL ? 0 : 1 );
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/*
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* This is system-dependant
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*/
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case GLUT_WINDOW_FORMAT_ID:
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/*
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* Return the visual ID, if there is a current window naturally:
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*/
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if( fgStructure.Window == NULL )
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return( 0 );
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return( fgStructure.Window->Window.VisualInfo->visualid );
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#elif TARGET_HOST_WIN32
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/*
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* Handle the OpenGL inquiries
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*/
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case GLUT_WINDOW_RGBA:
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glGetBooleanv ( GL_RGBA_MODE, &boolValue ) ; /* True if color buffers store RGBA */
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returnValue = boolValue ? 1 : 0 ;
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return ( returnValue ) ;
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case GLUT_WINDOW_DOUBLEBUFFER:
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glGetBooleanv ( GL_DOUBLEBUFFER, &boolValue ) ; /* True if front and back buffers exist */
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returnValue = boolValue ? 1 : 0 ;
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return ( returnValue ) ;
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case GLUT_WINDOW_STEREO:
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glGetBooleanv ( GL_STEREO, &boolValue ) ; /* True if left and right buffers exist */
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returnValue = boolValue ? 1 : 0 ;
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return ( returnValue ) ;
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case GLUT_WINDOW_RED_SIZE:
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glGetIntegerv ( GL_RED_BITS, &returnValue ) ; /* Number of bits per red component in color buffers */
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return ( returnValue ) ;
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case GLUT_WINDOW_GREEN_SIZE:
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glGetIntegerv ( GL_GREEN_BITS, &returnValue ) ; /* Number of bits per green component in color buffers */
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return ( returnValue ) ;
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case GLUT_WINDOW_BLUE_SIZE:
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glGetIntegerv ( GL_BLUE_BITS, &returnValue ) ; /* Number of bits per blue component in color buffers */
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return ( returnValue ) ;
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case GLUT_WINDOW_ALPHA_SIZE:
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glGetIntegerv ( GL_ALPHA_BITS, &returnValue ) ; /* Number of bits per alpha component in color buffers */
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return ( returnValue ) ;
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case GLUT_WINDOW_ACCUM_RED_SIZE:
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glGetIntegerv ( GL_ACCUM_RED_BITS, &returnValue ) ; /* Number of bits per red component in the accumulation buffer */
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return ( returnValue ) ;
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case GLUT_WINDOW_ACCUM_GREEN_SIZE:
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glGetIntegerv ( GL_ACCUM_GREEN_BITS, &returnValue ) ; /* Number of bits per green component in the accumulation buffer */
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return ( returnValue ) ;
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case GLUT_WINDOW_ACCUM_BLUE_SIZE:
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glGetIntegerv ( GL_ACCUM_BLUE_BITS, &returnValue ) ; /* Number of bits per blue component in the accumulation buffer */
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return ( returnValue ) ;
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case GLUT_WINDOW_ACCUM_ALPHA_SIZE:
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glGetIntegerv ( GL_ACCUM_ALPHA_BITS, &returnValue ) ; /* Number of bits per alpha component in the accumulation buffer */
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return ( returnValue ) ;
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case GLUT_WINDOW_DEPTH_SIZE:
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glGetIntegerv ( GL_DEPTH_BITS, &returnValue ) ; /* Number of depth-buffer bitplanes */
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return ( returnValue ) ;
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case GLUT_WINDOW_BUFFER_SIZE:
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returnValue = 1 ; /* ????? */
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return ( returnValue ) ;
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case GLUT_WINDOW_STENCIL_SIZE:
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returnValue = 0 ; /* ????? */
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return ( returnValue ) ;
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/*
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* Window position and size
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*/
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case GLUT_WINDOW_X:
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case GLUT_WINDOW_Y:
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case GLUT_WINDOW_WIDTH:
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case GLUT_WINDOW_HEIGHT:
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{
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/*
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* There is considerable confusion about the "right thing to do" concerning window
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* size and position. GLUT itself is not consistent between Windows and Linux; since
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* platform independence is a virtue for "freeglut", we decided to break with GLUT's
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* behaviour.
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* Under Linux, it is apparently not possible to get the window border sizes in order
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* to subtract them off the window's initial position until some time after the window
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* has been created. Therefore we decided on the following behaviour, both under
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* Windows and under Linux:
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* - When you create a window with position (x,y) and size (w,h), the upper left hand
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* corner of the outside of the window is at (x,y) and the size of the drawable area
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* is (w,h).
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* - When you query the size and position of the window--as is happening here for
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* Windows--"freeglut" will return the size of the drawable area--the (w,h) that you
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* specified when you created the window--and the coordinates of the upper left hand
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* corner of the drawable area--which is NOT the (x,y) you specified.
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*/
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RECT winRect;
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/*
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* Check if there is a window to be queried for dimensions:
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*/
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freeglut_return_val_if_fail( fgStructure.Window != NULL, 0 );
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/*
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* We need to call GetWindowRect() first...
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* (this returns the pixel coordinates of the outside of the window)
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*/
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GetWindowRect( fgStructure.Window->Window.Handle, &winRect );
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/*
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* ...then we've got to correct the results we've just received...
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*/
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if (fgStructure.GameMode != fgStructure.Window &&
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fgStructure.Window->Parent == NULL )
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{
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winRect.left += GetSystemMetrics( SM_CXSIZEFRAME );
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winRect.right -= GetSystemMetrics( SM_CXSIZEFRAME );
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winRect.top += GetSystemMetrics( SM_CYSIZEFRAME ) + GetSystemMetrics( SM_CYCAPTION );
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winRect.bottom -= GetSystemMetrics( SM_CYSIZEFRAME );
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}
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/*
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* ...and finally return the caller the desired value:
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*/
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switch( eWhat )
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{
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case GLUT_WINDOW_X: return( winRect.left );
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case GLUT_WINDOW_Y: return( winRect.top );
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case GLUT_WINDOW_WIDTH: return( winRect.right - winRect.left );
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case GLUT_WINDOW_HEIGHT: return( winRect.bottom - winRect.top );
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}
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}
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break;
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case GLUT_WINDOW_BORDER_WIDTH :
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return ( GetSystemMetrics( SM_CXSIZEFRAME ) ) ;
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case GLUT_WINDOW_HEADER_HEIGHT :
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return ( GetSystemMetrics( SM_CYCAPTION ) ) ;
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case GLUT_DISPLAY_MODE_POSSIBLE:
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/*
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* Check if the current display mode is possible
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*/
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return( fgSetupPixelFormat( fgStructure.Window, TRUE, PFD_MAIN_PLANE ) );
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case GLUT_WINDOW_FORMAT_ID:
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/*
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* Return the pixel format of the current window
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*/
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if( fgStructure.Window != NULL )
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return( GetPixelFormat( fgStructure.Window->Window.Device ) );
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/*
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* If the current window does not exist, fail:
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*/
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return( 0 );
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#endif
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/*
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* The window structure queries
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*/
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case GLUT_WINDOW_PARENT:
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/*
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* Return the ID number of current window's parent, if any
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*/
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if( fgStructure.Window == NULL ) return( 0 );
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if( fgStructure.Window->Parent == NULL ) return( 0 );
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return( fgStructure.Window->Parent->ID );
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case GLUT_WINDOW_NUM_CHILDREN:
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/*
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* Return the number of children attached to the current window
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*/
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if( fgStructure.Window == NULL )
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return( 0 );
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return( fgListLength( &fgStructure.Window->Children ) );
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case GLUT_WINDOW_CURSOR:
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/*
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* Return the currently selected window cursor
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*/
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if( fgStructure.Window == NULL )
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return( 0 );
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return( fgStructure.Window->State.Cursor );
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case GLUT_MENU_NUM_ITEMS:
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/*
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* Return the number of menu entries in the current menu
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*/
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if( fgStructure.Menu == NULL )
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return( 0 );
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return( fgListLength( &fgStructure.Menu->Entries ) );
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case GLUT_ACTION_ON_WINDOW_CLOSE:
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return fgState.ActionOnWindowClose;
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case GLUT_VERSION:
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return VERSION_MAJOR * 10000 + VERSION_MINOR * 100 + VERSION_PATCH;
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default:
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/*
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* Just have it reported, so that we can see what needs to be implemented
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*/
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fgWarning( "glutGet(): missing enum handle %i\n", eWhat );
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break;
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}
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/*
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* If nothing happens, then we are in deep trouble...
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*/
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return( -1 );
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}
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/*
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* Returns various device information.
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*/
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int FGAPIENTRY glutDeviceGet( GLenum eWhat )
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{
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freeglut_assert_ready;
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/*
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* See why are we bothered...
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*
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* WARNING: we are mostly lying in this function.
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*/
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switch( eWhat )
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{
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case GLUT_HAS_KEYBOARD:
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/*
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* We always have a keyboard present on PC machines...
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*/
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return( TRUE );
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#if TARGET_HOST_UNIX_X11
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case GLUT_HAS_MOUSE:
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/*
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* Hey, my Atari 65XE hasn't had a mouse!
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*/
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return( TRUE );
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case GLUT_NUM_MOUSE_BUTTONS:
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/*
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* Return the number of mouse buttons available. This is a big guess.
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*/
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return( 3 );
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#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 ***/
|