/*
* 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;
case GLUT_SKIP_STALE_MOTION_EVENTS:
fgState.SkipStaleMotion = value;
break;
default:
fgWarning( "glutSetOption(): missing enum handle %d", eWhat );
break;
}
}
/*
* Draws a solid cone
*/
void FGAPIENTRY glutSolidCone( GLdouble base, GLdouble height, GLint slices, GLint stacks )
{
int i,j;
/* Step in z and radius as stacks are drawn. */
double z0,z1;
double r0,r1;
const double zStep = height / ( ( stacks > 0 ) ? stacks : 1 );
const double rStep = base / ( ( stacks > 0 ) ? stacks : 1 );
/* Scaling factors for vertex normals */
const double cosn = ( height / sqrt ( height * height + base * base ));
const double sinn = ( base / sqrt ( height * height + base * base ));
/* Pre-computed circle */
double *sint,*cost;
FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSolidCone" );
fghCircleTable(&sint,&cost,-slices);
/* Cover the circular base with a triangle fan... */
z0 = 0.0;
z1 = zStep;
r0 = base;
r1 = r0 - rStep;
glBegin(GL_TRIANGLE_FAN);
glNormal3d(0.0,0.0,-1.0);
glVertex3d(0.0,0.0, z0 );
for (j=0; j<=slices; j++)
glVertex3d(cost[j]*r0, sint[j]*r0, z0);
glEnd();
/* Cover each stack with a quad strip, except the top stack */
for( i=0; i<stacks-1; i++ )
{
glBegin(GL_QUAD_STRIP);
for(j=0; j<=slices; j++)
{
glNormal3d(cost[j]*sinn, sint[j]*sinn, cosn);
glVertex3d(cost[j]*r0, sint[j]*r0, z0 );
glVertex3d(cost[j]*r1, sint[j]*r1, z1 );
}
z0 = z1; z1 += zStep;
r0 = r1; r1 -= rStep;
glEnd();
}
/* The top stack is covered with individual triangles */
glBegin(GL_TRIANGLES);
glNormal3d(cost[0]*sinn, sint[0]*sinn, cosn);
for (j=0; j<slices; j++)
{
glVertex3d(cost[j+0]*r0, sint[j+0]*r0, z0 );
glVertex3d(0, 0, height);
glNormal3d(cost[j+1]*sinn, sint[j+1]*sinn, cosn );
glVertex3d(cost[j+1]*r0, sint[j+1]*r0, z0 );
}
glEnd();
/* Release sin and cos tables */
free(sint);
free(cost);
}
/*
* Draws a wire torus
*/
void FGAPIENTRY glutWireTorus( GLdouble dInnerRadius, GLdouble dOuterRadius, GLint nSides, GLint nRings )
{
double iradius = dInnerRadius, oradius = dOuterRadius, phi, psi, dpsi, dphi;
double *vertex, *normal;
int i, j;
double spsi, cpsi, sphi, cphi ;
FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutWireTorus" );
if ( nSides < 1 ) nSides = 1;
if ( nRings < 1 ) nRings = 1;
/* Allocate the vertices array */
vertex = (double *)calloc( sizeof(double), 3 * nSides * nRings );
normal = (double *)calloc( sizeof(double), 3 * nSides * nRings );
glPushMatrix();
dpsi = 2.0 * M_PI / (double)nRings ;
dphi = -2.0 * M_PI / (double)nSides ;
psi = 0.0;
for( j=0; j<nRings; j++ )
{
cpsi = cos ( psi ) ;
spsi = sin ( psi ) ;
phi = 0.0;
for( i=0; i<nSides; i++ )
{
int offset = 3 * ( j * nSides + i ) ;
cphi = cos ( phi ) ;
sphi = sin ( phi ) ;
*(vertex + offset + 0) = cpsi * ( oradius + cphi * iradius ) ;
*(vertex + offset + 1) = spsi * ( oradius + cphi * iradius ) ;
*(vertex + offset + 2) = sphi * iradius ;
*(normal + offset + 0) = cpsi * cphi ;
*(normal + offset + 1) = spsi * cphi ;
*(normal + offset + 2) = sphi ;
phi += dphi;
}
psi += dpsi;
}
for( i=0; i<nSides; i++ )
{
glBegin( GL_LINE_LOOP );
for( j=0; j<nRings; j++ )
{
int offset = 3 * ( j * nSides + i ) ;
glNormal3dv( normal + offset );
glVertex3dv( vertex + offset );
}
glEnd();
}
for( j=0; j<nRings; j++ )
{
glBegin(GL_LINE_LOOP);
for( i=0; i<nSides; i++ )
{
int offset = 3 * ( j * nSides + i ) ;
glNormal3dv( normal + offset );
glVertex3dv( vertex + offset );
}
glEnd();
}
free ( vertex ) ;
free ( normal ) ;
glPopMatrix();
}
void FGAPIENTRY glutSetMenuData(void* data)
{
FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSetMenuData" );
fgStructure.CurrentMenu->UserData=data;
}
/*
* Draws a solid sphere
*/
void FGAPIENTRY glutSolidSphere(GLdouble radius, GLint slices, GLint stacks)
{
int i,j;
/* Adjust z and radius as stacks are drawn. */
double z0,z1;
double r0,r1;
/* Pre-computed circle */
double *sint1,*cost1;
double *sint2,*cost2;
FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSolidSphere" );
fghCircleTable(&sint1,&cost1,-slices);
fghCircleTable(&sint2,&cost2,stacks*2);
/* The top stack is covered with a triangle fan */
z0 = 1.0;
z1 = cost2[(stacks>0)?1:0];
r0 = 0.0;
r1 = sint2[(stacks>0)?1:0];
glBegin(GL_TRIANGLE_FAN);
glNormal3d(0,0,1);
glVertex3d(0,0,radius);
for (j=slices; j>=0; j--)
{
glNormal3d(cost1[j]*r1, sint1[j]*r1, z1 );
glVertex3d(cost1[j]*r1*radius, sint1[j]*r1*radius, z1*radius);
}
glEnd();
/* Cover each stack with a quad strip, except the top and bottom stacks */
for( i=1; i<stacks-1; i++ )
{
z0 = z1; z1 = cost2[i+1];
r0 = r1; r1 = sint2[i+1];
glBegin(GL_QUAD_STRIP);
for(j=0; j<=slices; j++)
{
glNormal3d(cost1[j]*r1, sint1[j]*r1, z1 );
glVertex3d(cost1[j]*r1*radius, sint1[j]*r1*radius, z1*radius);
glNormal3d(cost1[j]*r0, sint1[j]*r0, z0 );
glVertex3d(cost1[j]*r0*radius, sint1[j]*r0*radius, z0*radius);
}
glEnd();
}
/* The bottom stack is covered with a triangle fan */
z0 = z1;
r0 = r1;
glBegin(GL_TRIANGLE_FAN);
glNormal3d(0,0,-1);
glVertex3d(0,0,-radius);
for (j=0; j<=slices; j++)
{
glNormal3d(cost1[j]*r0, sint1[j]*r0, z0 );
glVertex3d(cost1[j]*r0*radius, sint1[j]*r0*radius, z0*radius);
}
glEnd();
/* Release sin and cos tables */
free(sint1);
free(cost1);
free(sint2);
free(cost2);
}
/*
* 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:
/*
* We always have a keyboard present on PC machines...
*
* XXX I think that some of my PCs will boot without a keyboard.
* XXX Also, who says that we are running on a PC? UNIX/X11
* XXX is much more generic, and X11 can go over a network.
* XXX Though in actuality, we can probably assume BOTH a
* XXX mouse and keyboard for most/all of our users.
*/
return TRUE ;
#if TARGET_HOST_UNIX_X11
case GLUT_HAS_MOUSE:
return TRUE ;
case GLUT_NUM_MOUSE_BUTTONS:
/*
* Return the number of mouse buttons available. This is a big guess.
*
* XXX We can probe /var/run/dmesg.boot which is world-readable.
* XXX This would be somewhat system-dependant, but is doable.
* XXX E.g., on NetBSD, my USB mouse registers:
* XXX ums0 at uhidev0: 3 buttons and Z dir.
* XXX We can also probe /var/log/XFree86\..*\.log to get
* XXX lines such as:
* XXX (**) Option "Buttons" "5"
* XXX (**) Option "ZAxisMapping" "4 5"
* XXX (**) Mouse0: ZAxisMapping: buttons 4 and 5
* XXX (**) Mouse0: Buttons: 5
* XXX ...which tells us even more, and is a bit less
* XXX system-dependant. (Other than MS-WINDOWS, all
* XXX target hosts with actual users are probably running
* XXX XFree86...) It is at least worth taking a look at
* XXX this file.
*/
return 3 ;
#elif TARGET_HOST_WIN32 || TARGET_HOST_WINCE
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... */
#if TARGET_HOST_WINCE
return 1;
#else
return GetSystemMetrics( SM_CMOUSEBUTTONS );
#endif /* TARGET_HOST_WINCE */
#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_SPACEBALL:
case GLUT_HAS_DIAL_AND_BUTTON_BOX:
case GLUT_HAS_TABLET:
return FALSE;
case GLUT_NUM_SPACEBALL_BUTTONS:
case GLUT_NUM_BUTTON_BOX_BUTTONS:
case GLUT_NUM_DIALS:
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;
}
/*
* Enters the game mode
*/
int FGAPIENTRY glutEnterGameMode( void )
{
FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutEnterGameMode" );
if( fgStructure.GameModeWindow )
fgAddToWindowDestroyList( fgStructure.GameModeWindow );
else
fghRememberState( );
if( ! fghChangeDisplayMode( GL_FALSE ) )
{
fgWarning( "failed to change screen settings" );
return 0;
}
fgStructure.GameModeWindow = fgCreateWindow(
NULL, "FREEGLUT", GL_TRUE, 0, 0,
GL_TRUE, fgState.GameModeSize.X, fgState.GameModeSize.Y,
GL_TRUE, GL_FALSE
);
fgStructure.GameModeWindow->State.Width = fgState.GameModeSize.X;
fgStructure.GameModeWindow->State.Height = fgState.GameModeSize.Y;
fgStructure.GameModeWindow->State.NeedToResize = GL_TRUE;
#if TARGET_HOST_POSIX_X11
/*
* Sync needed to avoid a real race, the Xserver must have really created
* the window before we can grab the pointer into it:
*/
XSync( fgDisplay.Display, False );
/*
* Grab the pointer to confine it into the window after the calls to
* XWrapPointer() which ensure that the pointer really enters the window.
*
* We also need to wait here until XGrabPointer() returns GrabSuccess,
* otherwise the new window is not viewable yet and if the next function
* (XSetInputFocus) is called with a not yet viewable window, it will exit
* the application which we have to aviod, so wait until it's viewable:
*/
while( GrabSuccess != XGrabPointer(
fgDisplay.Display, fgStructure.GameModeWindow->Window.Handle,
TRUE,
ButtonPressMask | ButtonReleaseMask | ButtonMotionMask
| PointerMotionMask,
GrabModeAsync, GrabModeAsync,
fgStructure.GameModeWindow->Window.Handle, None, CurrentTime) )
usleep( 100 );
/*
* Change input focus to the new window. This will exit the application
* if the new window is not viewable yet, see the XGrabPointer loop above.
*/
XSetInputFocus(
fgDisplay.Display,
fgStructure.GameModeWindow->Window.Handle,
RevertToNone,
CurrentTime
);
/* Move the Pointer to the middle of the fullscreen window */
XWarpPointer(
fgDisplay.Display,
None,
fgDisplay.RootWindow,
0, 0, 0, 0,
fgState.GameModeSize.X/2, fgState.GameModeSize.Y/2
);
# ifdef HAVE_X11_EXTENSIONS_XF86VMODE_H
if( fgDisplay.DisplayModeValid )
{
int x, y;
Window child;
/* Change to viewport to the window topleft edge: */
if( !XF86VidModeSetViewPort( fgDisplay.Display, fgDisplay.Screen, 0, 0 ) )
fgWarning( "XF86VidModeSetViewPort failed" );
/*
* Final window repositioning: It could be avoided using an undecorated
* window using override_redirect, but this * would possily require
* more changes and investigation.
*/
/* Get the current postion of the drawable area on screen */
XTranslateCoordinates(
fgDisplay.Display,
fgStructure.CurrentWindow->Window.Handle,
fgDisplay.RootWindow,
0, 0, &x, &y,
&child
);
/* Move the decorataions out of the topleft corner of the display */
XMoveWindow( fgDisplay.Display, fgStructure.CurrentWindow->Window.Handle,
-x, -y);
}
#endif
/* Grab the keyboard, too */
XGrabKeyboard(
fgDisplay.Display,
fgStructure.GameModeWindow->Window.Handle,
FALSE,
GrabModeAsync, GrabModeAsync,
CurrentTime
);
#endif
return fgStructure.GameModeWindow->ID;
}
/* A. Donev: Destruction callback for menus */
void FGAPIENTRY glutMenuDestroyFunc( void (* callback)( void ) )
{
FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutMenuDestroyFunc" );
if( fgStructure.CurrentMenu )
fgStructure.CurrentMenu->Destroy = callback;
}
/*
* Sets the global menu status callback for the current window
*/
void FGAPIENTRY glutMenuStatusFunc( void (* callback)( int, int, int ) )
{
FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutMenuStatusFunc" );
fgState.MenuStatusCallback = callback;
}
/*
* Window destruction callbacks
*/
void FGAPIENTRY glutCloseFunc( void (* callback)( void ) )
{
FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutCloseFunc" );
SET_CALLBACK( Destroy );
}
void FGAPIENTRY glutWMCloseFunc( void (* callback)( void ) )
{
FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutWMCloseFunc" );
glutCloseFunc( callback );
}
/*
* Window mouse entry/leave callback
*/
void FGAPIENTRY glutEntryFunc( void (* callback)( int ) )
{
FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutEntryFunc" );
SET_CALLBACK( Entry );
}
/*
* Sets the mouse wheel callback for the current window
*/
void FGAPIENTRY glutMouseWheelFunc( void (* callback)( int, int, int, int ) )
{
FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutMouseWheelFunc" );
SET_CALLBACK( MouseWheel );
}
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 previous_value;
int i;
temp_array = malloc(sizeof(int) * fbconfigArraySize);
previous_value = 0;
for (i = 0; i < fbconfigArraySize; i++)
{
int value;
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;
}
/*
* Sets the global idle callback
*/
void FGAPIENTRY glutIdleFunc( void (* callback)( void ) )
{
FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutIdleFunc" );
fgState.IdleCallback = callback;
}
/*
* Sets the overlay display callback for the current window
*/
void FGAPIENTRY glutOverlayDisplayFunc( void (* callback)( void ) )
{
FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutOverlayDisplayFunc" );
SET_CALLBACK( OverlayDisplay );
}
/*
* General settings query method
*/
int FGAPIENTRY glutGet( GLenum eWhat )
{
#if TARGET_HOST_WIN32 || TARGET_HOST_WINCE
int returnValue ;
GLboolean boolValue ;
#endif
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.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:
/* XXX 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:
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;
}
return fgStructure.CurrentWindow->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_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:
return( fgChooseVisual() == NULL ? 0 : 1 );
/* This is system-dependant */
case GLUT_WINDOW_FORMAT_ID:
if( fgStructure.CurrentWindow == NULL )
return 0;
return fgStructure.CurrentWindow->Window.VisualInfo->visualid;
#elif TARGET_HOST_WIN32 || TARGET_HOST_WINCE
/* Handle the OpenGL inquiries */
case GLUT_WINDOW_RGBA:
glGetBooleanv ( GL_RGBA_MODE, &boolValue );
returnValue = boolValue ? 1 : 0;
return returnValue;
case GLUT_WINDOW_DOUBLEBUFFER:
glGetBooleanv ( GL_DOUBLEBUFFER, &boolValue );
returnValue = boolValue ? 1 : 0;
return returnValue;
case GLUT_WINDOW_STEREO:
glGetBooleanv ( GL_STEREO, &boolValue );
returnValue = boolValue ? 1 : 0;
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:
glGetIntegerv ( GL_ACCUM_RED_BITS, &returnValue );
return returnValue;
case GLUT_WINDOW_ACCUM_GREEN_SIZE:
glGetIntegerv ( GL_ACCUM_GREEN_BITS, &returnValue );
return returnValue;
case GLUT_WINDOW_ACCUM_BLUE_SIZE:
glGetIntegerv ( GL_ACCUM_BLUE_BITS, &returnValue );
return returnValue;
case GLUT_WINDOW_ACCUM_ALPHA_SIZE:
glGetIntegerv ( GL_ACCUM_ALPHA_BITS, &returnValue );
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 !TARGET_HOST_WINCE
if ( ( fgStructure.GameMode != 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 /* !TARGET_HOST_WINCE */
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 TARGET_HOST_WINCE
return 0;
#else
return GetSystemMetrics( SM_CXSIZEFRAME );
#endif /* !TARGET_HOST_WINCE */
case GLUT_WINDOW_HEADER_HEIGHT :
#if TARGET_HOST_WINCE
return 0;
#else
return GetSystemMetrics( SM_CYCAPTION );
#endif /* TARGET_HOST_WINCE */
case GLUT_DISPLAY_MODE_POSSIBLE:
#if TARGET_HOST_WINCE
return GL_FALSE;
#else
return fgSetupPixelFormat( fgStructure.CurrentWindow, GL_TRUE,
PFD_MAIN_PLANE );
#endif /* TARGET_HOST_WINCE */
case GLUT_WINDOW_FORMAT_ID:
#if !TARGET_HOST_WINCE
if( fgStructure.CurrentWindow != NULL )
return GetPixelFormat( fgStructure.CurrentWindow->Window.Device );
#endif /* TARGET_HOST_WINCE */
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;
break;
default:
fgWarning( "glutGet(): missing enum handle %d", eWhat );
break;
}
return -1;
}
/*
* Sets the window status callback for the current window
*/
void FGAPIENTRY glutWindowStatusFunc( void (* callback)( int ) )
{
FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutWindowStatusFunc" );
SET_CALLBACK( WindowStatus );
}
/*
* 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_UNIX_X11
case GLUT_OVERLAY_POSSIBLE:
return FALSE;
case GLUT_LAYER_IN_USE:
return GLUT_NORMAL;
case GLUT_HAS_OVERLAY:
return FALSE;
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 FALSE;
case GLUT_OVERLAY_DAMAGED:
return -1;
#elif TARGET_HOST_WIN32 || TARGET_HOST_WINCE
case GLUT_OVERLAY_POSSIBLE:
/* return fgSetupPixelFormat( fgStructure.CurrentWindow, GL_TRUE,
PFD_OVERLAY_PLANE ); */
return FALSE ;
case GLUT_LAYER_IN_USE:
return GLUT_NORMAL;
case GLUT_HAS_OVERLAY:
return FALSE;
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 FALSE;
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;
}
/*
* Sets the tablet buttons callback for the current window
*/
void FGAPIENTRY glutTabletButtonFunc( void (* callback)( int, int, int, int ) )
{
FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutTabletButtonFunc" );
SET_CALLBACK( TabletButton );
}
/*
* A.Donev: Set and retrieve the menu's user data
*/
void* FGAPIENTRY glutGetMenuData( void )
{
FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutGetMenuData" );
return fgStructure.CurrentMenu->UserData;
}
/*
* Sets the multi-pointer passive motion callback for the current window
*/
void FGAPIENTRY glutMultiPassiveFunc( void (* callback)(int, int, int ) )
{
FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutMultiPassiveFunc" );
SET_CALLBACK( MultiPassive );
}
/*
* Enters the freeglut processing loop.
* Stays until the "ExecState" changes to "GLUT_EXEC_STATE_STOP".
*/
void FGAPIENTRY glutMainLoopMT( void )
{
//int action; //MT
#if TARGET_HOST_WIN32 || TARGET_HOST_WINCE
SFG_Window *window = (SFG_Window *)fgStructure.Windows.First ;
#endif
FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutMainLoop" );
#if TARGET_HOST_WIN32 || TARGET_HOST_WINCE
/*
* Processing before the main loop: If there is a window which is open and
* which has a visibility callback, call it. I know this is an ugly hack,
* but I'm not sure what else to do about it. Ideally we should leave
* something uninitialized in the create window code and initialize it in
* the main loop, and have that initialization create a "WM_ACTIVATE"
* message. Then we would put the visibility callback code in the
* "case WM_ACTIVATE" block below. - John Fay -- 10/24/02
*/
while( window )
{
if ( FETCH_WCB( *window, Visibility ) )
{
SFG_Window *current_window = fgStructure.CurrentWindow ;
INVOKE_WCB( *window, Visibility, ( window->State.Visible ) );
fgSetWindow( current_window );
}
window = (SFG_Window *)window->Node.Next ;
}
#endif
fgState.ExecState = GLUT_EXEC_STATE_RUNNING ;
while( fgState.ExecState == GLUT_EXEC_STATE_RUNNING )
{
SFG_Window *window;
glutMainLoopEvent( );
/*
* Step through the list of windows, seeing if there are any
* that are not menus
*/
for( window = ( SFG_Window * )fgStructure.Windows.First;
window;
window = ( SFG_Window * )window->Node.Next )
if ( ! ( window->IsMenu ) )
break;
if( ! window )
fgState.ExecState = GLUT_EXEC_STATE_STOP;
else
{
if( fgState.IdleCallback )
{
if( fgStructure.CurrentWindow &&
fgStructure.CurrentWindow->IsMenu )
/* fail safe */
fgSetWindow( window );
fgState.IdleCallback( );
}
fghSleepForEvents( );
}
}
#if 0 //Marc Toussaint
/*
* When this loop terminates, destroy the display, state and structure
* of a freeglut session, so that another glutInit() call can happen
*
* Save the "ActionOnWindowClose" because "fgDeinitialize" resets it.
*/
action = fgState.ActionOnWindowClose;
fgDeinitialize( );
if( action == GLUT_ACTION_EXIT )
exit( 0 );
#endif
}
/*
* Sets the Reshape callback for the current window
*/
void FGAPIENTRY glutReshapeFunc( void (* callback)( int, int ) )
{
FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutReshapeFunc" );
SET_CALLBACK( Reshape );
}
/*
* Draws a wire sphere
*/
void FGAPIENTRY glutWireSphere(GLdouble radius, GLint slices, GLint stacks)
{
int i,j;
/* Adjust z and radius as stacks and slices are drawn. */
double r;
double x,y,z;
/* Pre-computed circle */
double *sint1,*cost1;
double *sint2,*cost2;
FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutWireSphere" );
fghCircleTable(&sint1,&cost1,-slices );
fghCircleTable(&sint2,&cost2, stacks*2);
/* Draw a line loop for each stack */
for (i=1; i<stacks; i++)
{
z = cost2[i];
r = sint2[i];
glBegin(GL_LINE_LOOP);
for(j=0; j<=slices; j++)
{
x = cost1[j];
y = sint1[j];
glNormal3d(x,y,z);
glVertex3d(x*r*radius,y*r*radius,z*radius);
}
glEnd();
}
/* Draw a line loop for each slice */
for (i=0; i<slices; i++)
{
glBegin(GL_LINE_STRIP);
for(j=0; j<=stacks; j++)
{
x = cost1[i]*sint2[j];
y = sint1[i]*sint2[j];
z = cost2[j];
glNormal3d(x,y,z);
glVertex3d(x*radius,y*radius,z*radius);
}
glEnd();
}
/* Release sin and cos tables */
free(sint1);
free(cost1);
free(sint2);
free(cost2);
}
/*
* Sets the Keyboard callback for the current window
*/
void FGAPIENTRY glutKeyboardFunc( void (* callback)
( unsigned char, int, int ) )
{
FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutKeyboardFunc" );
SET_CALLBACK( Keyboard );
}
/*
* Draws a wire cone
*/
void FGAPIENTRY glutWireCone( GLdouble base, GLdouble height, GLint slices, GLint stacks)
{
int i,j;
/* Step in z and radius as stacks are drawn. */
double z = 0.0;
double r = base;
const double zStep = height / ( ( stacks > 0 ) ? stacks : 1 );
const double rStep = base / ( ( stacks > 0 ) ? stacks : 1 );
/* Scaling factors for vertex normals */
const double cosn = ( height / sqrt ( height * height + base * base ));
const double sinn = ( base / sqrt ( height * height + base * base ));
/* Pre-computed circle */
double *sint,*cost;
FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutWireCone" );
fghCircleTable(&sint,&cost,-slices);
/* Draw the stacks... */
for (i=0; i<stacks; i++)
{
glBegin(GL_LINE_LOOP);
for( j=0; j<slices; j++ )
{
glNormal3d(cost[j]*sinn, sint[j]*sinn, cosn);
glVertex3d(cost[j]*r, sint[j]*r, z );
}
glEnd();
z += zStep;
r -= rStep;
}
/* Draw the slices */
r = base;
glBegin(GL_LINES);
for (j=0; j<slices; j++)
{
glNormal3d(cost[j]*sinn, sint[j]*sinn, cosn );
glVertex3d(cost[j]*r, sint[j]*r, 0.0 );
glVertex3d(0.0, 0.0, height);
}
glEnd();
/* Release sin and cos tables */
free(sint);
free(cost);
}
/*
* Sets the Special callback for the current window
*/
void FGAPIENTRY glutSpecialFunc( void (* callback)( int, int, int ) )
{
FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSpecialFunc" );
SET_CALLBACK( Special );
}
/*
* Draws a solid torus
*/
void FGAPIENTRY glutSolidTorus( GLdouble dInnerRadius, GLdouble dOuterRadius, GLint nSides, GLint nRings )
{
double iradius = dInnerRadius, oradius = dOuterRadius, phi, psi, dpsi, dphi;
double *vertex, *normal;
int i, j;
double spsi, cpsi, sphi, cphi ;
FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSolidTorus" );
if ( nSides < 1 ) nSides = 1;
if ( nRings < 1 ) nRings = 1;
/* Increment the number of sides and rings to allow for one more point than surface */
nSides ++ ;
nRings ++ ;
/* Allocate the vertices array */
vertex = (double *)calloc( sizeof(double), 3 * nSides * nRings );
normal = (double *)calloc( sizeof(double), 3 * nSides * nRings );
glPushMatrix();
dpsi = 2.0 * M_PI / (double)(nRings - 1) ;
dphi = -2.0 * M_PI / (double)(nSides - 1) ;
psi = 0.0;
for( j=0; j<nRings; j++ )
{
cpsi = cos ( psi ) ;
spsi = sin ( psi ) ;
phi = 0.0;
for( i=0; i<nSides; i++ )
{
int offset = 3 * ( j * nSides + i ) ;
cphi = cos ( phi ) ;
sphi = sin ( phi ) ;
*(vertex + offset + 0) = cpsi * ( oradius + cphi * iradius ) ;
*(vertex + offset + 1) = spsi * ( oradius + cphi * iradius ) ;
*(vertex + offset + 2) = sphi * iradius ;
*(normal + offset + 0) = cpsi * cphi ;
*(normal + offset + 1) = spsi * cphi ;
*(normal + offset + 2) = sphi ;
phi += dphi;
}
psi += dpsi;
}
glBegin( GL_QUADS );
for( i=0; i<nSides-1; i++ )
{
for( j=0; j<nRings-1; j++ )
{
int offset = 3 * ( j * nSides + i ) ;
glNormal3dv( normal + offset );
glVertex3dv( vertex + offset );
glNormal3dv( normal + offset + 3 );
glVertex3dv( vertex + offset + 3 );
glNormal3dv( normal + offset + 3 * nSides + 3 );
glVertex3dv( vertex + offset + 3 * nSides + 3 );
glNormal3dv( normal + offset + 3 * nSides );
glVertex3dv( vertex + offset + 3 * nSides );
}
}
glEnd();
free ( vertex ) ;
free ( normal ) ;
glPopMatrix();
}
/*
* 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;
}
