static int
checkOverlayAcceptability(XVisualInfo * vi, unsigned int mode)
{
int value;
/* Must support OpenGL. */
glXGetConfig(__glutDisplay, vi, GLX_USE_GL, &value);
if (!value)
return 1;
/* Must be color index. */
glXGetConfig(__glutDisplay, vi, GLX_RGBA, &value);
if (value)
return 1;
/* Must match single/double buffering request. */
glXGetConfig(__glutDisplay, vi, GLX_DOUBLEBUFFER, &value);
if (GLUT_WIND_IS_DOUBLE(mode) != (value != 0))
return 1;
/* Must match mono/stereo request. */
glXGetConfig(__glutDisplay, vi, GLX_STEREO, &value);
if (GLUT_WIND_IS_STEREO(mode) != (value != 0))
return 1;
/* Alpha and accumulation buffers incompatible with color
index. */
if (GLUT_WIND_HAS_ALPHA(mode) || GLUT_WIND_HAS_ACCUM(mode))
return 1;
/* Look for depth buffer if requested. */
glXGetConfig(__glutDisplay, vi, GLX_DEPTH_SIZE, &value);
if (GLUT_WIND_HAS_DEPTH(mode) && (value <= 0))
return 1;
/* Look for stencil buffer if requested. */
glXGetConfig(__glutDisplay, vi, GLX_STENCIL_SIZE, &value);
if (GLUT_WIND_HAS_STENCIL(mode) && (value <= 0))
return 1;
#if defined(GLX_VERSION_1_1) && defined(GLX_SGIS_multisample)
/* XXX Multisampled overlay color index?? Pretty unlikely. */
/* Look for multisampling if requested. */
if (__glutIsSupportedByGLX("GLX_SGIS_multisample"))
glXGetConfig(__glutDisplay, vi, GLX_SAMPLES_SGIS, &value);
else
value = 0;
if (GLUT_WIND_IS_MULTISAMPLE(mode) && (value <= 0))
return 1;
#endif
return 0;
}
/* CENTRY */
int GLUTAPIENTRY
glutGet(GLenum param)
{
Window win, root;
int x, y, value;
unsigned int width, height, border, depth;
switch (param) {
case GLUT_INIT_WINDOW_X:
return __glutInitX;
case GLUT_INIT_WINDOW_Y:
return __glutInitY;
case GLUT_INIT_WINDOW_WIDTH:
return __glutInitWidth;
case GLUT_INIT_WINDOW_HEIGHT:
return __glutInitHeight;
case GLUT_INIT_DISPLAY_MODE:
return __glutDisplayMode;
case GLUT_WINDOW_X:
XTranslateCoordinates(__glutDisplay, __glutCurrentWindow->win,
__glutRoot, 0, 0, &x, &y, &win);
return x;
case GLUT_WINDOW_Y:
XTranslateCoordinates(__glutDisplay, __glutCurrentWindow->win,
__glutRoot, 0, 0, &x, &y, &win);
return y;
case GLUT_WINDOW_WIDTH:
if (!__glutCurrentWindow->reshape) {
XGetGeometry(__glutDisplay, __glutCurrentWindow->win,
&root, &x, &y,
&width, &height, &border, &depth);
return width;
}
return __glutCurrentWindow->width;
case GLUT_WINDOW_HEIGHT:
if (!__glutCurrentWindow->reshape) {
XGetGeometry(__glutDisplay, __glutCurrentWindow->win,
&root, &x, &y,
&width, &height, &border, &depth);
return height;
}
return __glutCurrentWindow->height;
#ifdef __OS2__
#define GET_CONFIG(attrib) \
{ if (__glutCurrentWindow->renderWin == __glutCurrentWindow->win) \
glXGetConfig( __glutCurrentWindow->vis, attrib, &value); \
else \
glXGetConfig(__glutCurrentWindow->overlay->vis, attrib, &value); \
} \
#else
#define GET_CONFIG(attrib) { \
if (__glutCurrentWindow->renderWin == __glutCurrentWindow->win) { \
glXGetConfig(__glutDisplay, __glutCurrentWindow->vis, \
attrib, &value); \
} else { \
glXGetConfig(__glutDisplay, __glutCurrentWindow->overlay->vis, \
attrib, &value); \
} \
}
#endif
case GLUT_WINDOW_BUFFER_SIZE:
GET_CONFIG(GLX_BUFFER_SIZE);
return value;
case GLUT_WINDOW_STENCIL_SIZE:
GET_CONFIG(GLX_STENCIL_SIZE);
return value;
case GLUT_WINDOW_DEPTH_SIZE:
GET_CONFIG(GLX_DEPTH_SIZE);
return value;
case GLUT_WINDOW_RED_SIZE:
GET_CONFIG(GLX_RED_SIZE);
return value;
case GLUT_WINDOW_GREEN_SIZE:
GET_CONFIG(GLX_GREEN_SIZE);
return value;
case GLUT_WINDOW_BLUE_SIZE:
GET_CONFIG(GLX_BLUE_SIZE);
return value;
case GLUT_WINDOW_ALPHA_SIZE:
GET_CONFIG(GLX_ALPHA_SIZE);
return value;
case GLUT_WINDOW_ACCUM_RED_SIZE:
GET_CONFIG(GLX_ACCUM_RED_SIZE);
return value;
case GLUT_WINDOW_ACCUM_GREEN_SIZE:
GET_CONFIG(GLX_ACCUM_GREEN_SIZE);
return value;
case GLUT_WINDOW_ACCUM_BLUE_SIZE:
GET_CONFIG(GLX_ACCUM_BLUE_SIZE);
return value;
case GLUT_WINDOW_ACCUM_ALPHA_SIZE:
GET_CONFIG(GLX_ACCUM_ALPHA_SIZE);
return value;
case GLUT_WINDOW_DOUBLEBUFFER:
GET_CONFIG(GLX_DOUBLEBUFFER);
return value;
case GLUT_WINDOW_RGBA:
GET_CONFIG(GLX_RGBA);
return value;
case GLUT_WINDOW_COLORMAP_SIZE:
GET_CONFIG(GLX_RGBA);
if (value) {
return 0;
} else {
#if defined(_WIN32) || defined(__OS2__)
/* KLUDGE: we always assume 256 colors in CI mode on
Win32 */
return 256;
#else
if (__glutCurrentWindow->renderWin == __glutCurrentWindow->win) {
return __glutCurrentWindow->vis->visual->map_entries;
} else {
return __glutCurrentWindow->overlay->vis->visual->map_entries;
}
#endif /* _WIN32 */
}
case GLUT_WINDOW_PARENT:
return __glutCurrentWindow->parent ?
__glutCurrentWindow->parent->num + 1 : 0;
case GLUT_WINDOW_NUM_CHILDREN:
{
int num = 0;
GLUTwindow *children = __glutCurrentWindow->children;
while (children) {
num++;
children = children->siblings;
}
return num;
}
case GLUT_WINDOW_NUM_SAMPLES:
#if defined(GLX_VERSION_1_1) && defined(GLX_SGIS_multisample)
if (__glutIsSupportedByGLX("GLX_SGIS_multisample")) {
GET_CONFIG(GLX_SAMPLES_SGIS);
return value;
} else {
return 0;
}
#else
/* Independent of GLX server support, multisampling not
supported by GLX client-side. */
return 0;
#endif
case GLUT_WINDOW_STEREO:
GET_CONFIG(GLX_STEREO);
return value;
case GLUT_WINDOW_CURSOR:
return __glutCurrentWindow->cursor;
case GLUT_SCREEN_WIDTH:
return DisplayWidth(__glutDisplay, __glutScreen);
case GLUT_SCREEN_HEIGHT:
return DisplayHeight(__glutDisplay, __glutScreen);
case GLUT_SCREEN_WIDTH_MM:
return DisplayWidthMM(__glutDisplay, __glutScreen);
case GLUT_SCREEN_HEIGHT_MM:
return DisplayHeightMM(__glutDisplay, __glutScreen);
case GLUT_MENU_NUM_ITEMS:
return __glutCurrentMenu->num;
case GLUT_DISPLAY_MODE_POSSIBLE:
{
XVisualInfo *vi;
Bool dummy, visAlloced;
void *fbc;
#if defined(_WIN32)
/* Our fake glXChooseVisual (which is called by
__glutDetermineVisual) needs an HDC to work with, so grab one
from the "root" window. */
XHDC = GetDC(GetDesktopWindow());
#endif
vi = __glutDetermineWindowVisual(&dummy, &visAlloced, &fbc);
#if defined(_WIN32)
ReleaseDC(GetDesktopWindow(), XHDC);
#endif
if (vi) {
if (visAlloced)
XFree(vi);
return 1;
}
return 0;
}
case GLUT_ELAPSED_TIME:
{
#ifdef OLD_VMS
struct timeval6 elapsed, beginning, now;
#else
struct timeval elapsed, beginning, now;
#endif
__glutInitTime(&beginning);
GETTIMEOFDAY(&now);
TIMEDELTA(elapsed, now, beginning);
/* Return elapsed milliseconds. */
#if defined(__vms) && ( __VMS_VER < 70000000 )
return (int) (elapsed.val / TICKS_PER_MILLISECOND);
#else
return (int) ((elapsed.tv_sec * 1000) + (elapsed.tv_usec / 1000));
#endif
}
case GLUT_WINDOW_FORMAT_ID:
#if defined(__OS2__)
return wglGetPixelFormat(__glutCurrentWindow->hdc);
#elif defined(_WIN32)
return GetPixelFormat(__glutCurrentWindow->hdc);
#else
if (__glutCurrentWindow->renderWin == __glutCurrentWindow->win) {
return (int) __glutCurrentWindow->vis->visualid;
} else {
return (int) __glutCurrentWindow->overlay->vis->visualid;
}
#endif
default:
__glutWarning("invalid glutGet parameter: %d", param);
return -1;
}
}
static XVisualInfo *
getVisualInfoRGB(unsigned int mode)
{
#if POKA
int list[32];
int n = 0;
/* Should not be looking at display mode mask if
__glutDisplayString is non-NULL. */
assert(!__glutDisplayString);
/* XXX Would a caching mechanism to minize the calls to
glXChooseVisual? You'd have to reference count
XVisualInfo* pointers. Would also have to properly
interact with glutInitDisplayString. */
list[n++] = GLX_RGBA;
list[n++] = GLX_RED_SIZE;
list[n++] = 1;
list[n++] = GLX_GREEN_SIZE;
list[n++] = 1;
list[n++] = GLX_BLUE_SIZE;
list[n++] = 1;
if (GLUT_WIND_HAS_ALPHA(mode)) {
list[n++] = GLX_ALPHA_SIZE;
list[n++] = 1;
}
if (GLUT_WIND_IS_DOUBLE(mode)) {
list[n++] = GLX_DOUBLEBUFFER;
}
if (GLUT_WIND_IS_STEREO(mode)) {
list[n++] = GLX_STEREO;
}
if (GLUT_WIND_HAS_DEPTH(mode)) {
list[n++] = GLX_DEPTH_SIZE;
list[n++] = 1;
}
if (GLUT_WIND_HAS_STENCIL(mode)) {
list[n++] = GLX_STENCIL_SIZE;
list[n++] = 1;
}
if (GLUT_WIND_HAS_ACCUM(mode)) {
list[n++] = GLX_ACCUM_RED_SIZE;
list[n++] = 1;
list[n++] = GLX_ACCUM_GREEN_SIZE;
list[n++] = 1;
list[n++] = GLX_ACCUM_BLUE_SIZE;
list[n++] = 1;
if (GLUT_WIND_HAS_ALPHA(mode)) {
list[n++] = GLX_ACCUM_ALPHA_SIZE;
list[n++] = 1;
}
}
#if defined(GLX_VERSION_1_1) && (defined(GLX_SGIS_multisample) || defined(GLX_ARB_multisample))
if (GLUT_WIND_IS_MULTISAMPLE(mode)) {
if (!__glutIsSupportedByGLX("GLX_SGIS_multisample") &&
!__glutIsSupportedByGLX("GLX_ARB_multisample"))
return NULL;
#if defined(GLX_ARB_multisample)
list[n++] = GLX_SAMPLES_ARB;
#elif defined(GLX_SGIS_multisample)
list[n++] = GLX_SAMPLES_SGIS;
#endif
/* XXX Is 4 a reasonable minimum acceptable number of
samples? */
list[n++] = 4;
}
#endif
list[n] = (int) None; /* terminate list */
return glXChooseVisual(__glutDisplay,
__glutScreen, list);
#else /* POKA */
return
glXChooseVisual(mode);
#endif
}
static XVisualInfo *
getVisualInfoRGB(unsigned int mode)
{
int list[32];
int n = 0;
/* Should not be looking at display mode mask if
__glutDisplayString is non-NULL. */
assert(!__glutDisplayString);
/* XXX Would a caching mechanism to minize the calls to
glXChooseVisual? You'd have to reference count
XVisualInfo* pointers. Would also have to properly
interact with glutInitDisplayString. */
list[n++] = GLX_RGBA;
list[n++] = GLX_RED_SIZE;
list[n++] = 1;
list[n++] = GLX_GREEN_SIZE;
list[n++] = 1;
list[n++] = GLX_BLUE_SIZE;
list[n++] = 1;
if (GLUT_WIND_HAS_ALPHA(mode)) {
list[n++] = GLX_ALPHA_SIZE;
list[n++] = 1;
}
if (GLUT_WIND_IS_DOUBLE(mode)) {
list[n++] = GLX_DOUBLEBUFFER;
}
if (GLUT_WIND_IS_STEREO(mode)) {
list[n++] = GLX_STEREO;
}
if (GLUT_WIND_HAS_DEPTH(mode)) {
list[n++] = GLX_DEPTH_SIZE;
list[n++] = 1;
}
if (GLUT_WIND_HAS_STENCIL(mode)) {
list[n++] = GLX_STENCIL_SIZE;
list[n++] = 1;
}
if (GLUT_WIND_HAS_ACCUM(mode)) {
list[n++] = GLX_ACCUM_RED_SIZE;
list[n++] = 1;
list[n++] = GLX_ACCUM_GREEN_SIZE;
list[n++] = 1;
list[n++] = GLX_ACCUM_BLUE_SIZE;
list[n++] = 1;
if (GLUT_WIND_HAS_ALPHA(mode)) {
list[n++] = GLX_ACCUM_ALPHA_SIZE;
list[n++] = 1;
}
}
/* GLX_SAMPLES_SGIS has the same value as GLX_SAMPLES_ARB. */
# ifndef GLX_SAMPLES_ARB
# define GLX_SAMPLES_ARB 100001
# endif
if (GLUT_WIND_IS_MULTISAMPLE(mode)) {
if (
#ifdef _WIN32
!has_WGL_ARB_multisample
#else
!__glutIsSupportedByGLX("GLX_SGIS_multisample") &&
!__glutIsSupportedByGLX("GLX_ARB_multisample")
#endif
) {
return NULL;
}
/* Accept either the SGIS or ARB GLX multisample extensions. */
list[n++] = GLX_SAMPLES_ARB;
list[n++] = 2;
}
list[n] = (int) None; /* terminate list */
return glXChooseVisual(__glutDisplay,
__glutScreen, list);
}
/* CENTRY */
int APIENTRY
glutVideoResizeGet(GLenum param)
{
#if defined(GLX_VERSION_1_1) && defined(GLX_SGIX_video_resize)
if (canVideoResize < 0) {
canVideoResize = __glutIsSupportedByGLX("GLX_SGIX_video_resize");
if (canVideoResize) {
#if __sgi
/* This is a hack because IRIX 6.2, 6.3, and some 6.4
versions were released with GLX_SGIX_video_resize
being advertised by the X server though the video
resize extension is not actually supported. We try to
determine if the libGL.so we are using actually has a
video resize entrypoint before we try to use the
feature. */
void (*func) (void);
void *glxDso = dlopen("libGL.so", RTLD_LAZY);
func = (void (*)(void)) dlsym(glxDso, "glXQueryChannelDeltasSGIX");
if (!func) {
canVideoResize = 0;
} else
#endif
{
char *channelString;
int (*handler) (Display *, XErrorEvent *);
channelString = getenv("GLUT_VIDEO_RESIZE_CHANNEL");
videoResizeChannel = channelString ? atoi(channelString) : 0;
/* Work around another annoying problem with SGI's
GLX_SGIX_video_resize implementation. Early IRIX
6.4 OpenGL's advertise the extension and have the
video resize API, but an XSGIvc X protocol errors
result trying to use the API. Set up an error
handler to intercept what would otherwise be a fatal
error. If an error was recieved, do not report that
video resize is possible. */
handler = XSetErrorHandler(catchXSGIvcErrors);
errorCaught = 0;
glXQueryChannelDeltasSGIX(__glutDisplay, __glutScreen,
videoResizeChannel, &dx, &dy, &dw, &dh);
/* glXQueryChannelDeltasSGIX is an inherent X server
round-trip so we know we will have gotten either the
correct reply or and error by this time. */
XSetErrorHandler(handler);
/* Still yet another work around. In IRIX 6.4 betas,
glXQueryChannelDeltasSGIX will return as if it
succeeded, but the values are filled with junk.
Watch to make sure the delta variables really make
sense. */
if (errorCaught ||
dx < 0 || dy < 0 || dw < 0 || dh < 0 ||
dx > 2048 || dy > 2048 || dw > 2048 || dh > 2048) {
canVideoResize = 0;
}
}
}
}
#endif /* GLX_SGIX_video_resize */
switch (param) {
case GLUT_VIDEO_RESIZE_POSSIBLE:
return canVideoResize;
case GLUT_VIDEO_RESIZE_IN_USE:
return videoResizeInUse;
case GLUT_VIDEO_RESIZE_X_DELTA:
return dx;
case GLUT_VIDEO_RESIZE_Y_DELTA:
return dy;
case GLUT_VIDEO_RESIZE_WIDTH_DELTA:
return dw;
case GLUT_VIDEO_RESIZE_HEIGHT_DELTA:
return dh;
case GLUT_VIDEO_RESIZE_X:
case GLUT_VIDEO_RESIZE_Y:
case GLUT_VIDEO_RESIZE_WIDTH:
case GLUT_VIDEO_RESIZE_HEIGHT:
#if defined(GLX_VERSION_1_1) && defined(GLX_SGIX_video_resize)
if (videoResizeInUse) {
int x, y, width, height;
glXQueryChannelRectSGIX(__glutDisplay, __glutScreen,
videoResizeChannel, &x, &y, &width, &height);
switch (param) {
case GLUT_VIDEO_RESIZE_X:
return x;
case GLUT_VIDEO_RESIZE_Y:
return y;
case GLUT_VIDEO_RESIZE_WIDTH:
return width;
case GLUT_VIDEO_RESIZE_HEIGHT:
return height;
}
}
#endif
return -1;
default:
__glutWarning("invalid glutVideoResizeGet parameter: %d", param);
return -1;
}
}
static XVisualInfo *
getVisualInfoRGB(unsigned int mode)
{
int list[32];
int n = 0;
/* XXX Would a caching mechanism to minize the calls to
glXChooseVisual? You'd have to reference count
XVisualInfo* pointers. */
list[n++] = GLX_RGBA;
list[n++] = GLX_RED_SIZE;
list[n++] = 1;
list[n++] = GLX_GREEN_SIZE;
list[n++] = 1;
list[n++] = GLX_BLUE_SIZE;
list[n++] = 1;
if (GLUT_WIND_HAS_ALPHA(mode)) {
list[n++] = GLX_ALPHA_SIZE;
list[n++] = 1;
}
if (GLUT_WIND_IS_DOUBLE(mode)) {
list[n++] = GLX_DOUBLEBUFFER;
}
if (GLUT_WIND_IS_STEREO(mode)) {
list[n++] = GLX_STEREO;
}
if (GLUT_WIND_HAS_DEPTH(mode)) {
list[n++] = GLX_DEPTH_SIZE;
list[n++] = 1;
}
if (GLUT_WIND_HAS_STENCIL(mode)) {
list[n++] = GLX_STENCIL_SIZE;
list[n++] = 1;
}
if (GLUT_WIND_HAS_ACCUM(mode)) {
list[n++] = GLX_ACCUM_RED_SIZE;
list[n++] = 1;
list[n++] = GLX_ACCUM_GREEN_SIZE;
list[n++] = 1;
list[n++] = GLX_ACCUM_BLUE_SIZE;
list[n++] = 1;
if (GLUT_WIND_HAS_ALPHA(mode)) {
list[n++] = GLX_ACCUM_ALPHA_SIZE;
list[n++] = 1;
}
}
#if defined(GLX_VERSION_1_1) && defined(GLX_SGIS_multisample)
if (GLUT_WIND_IS_MULTISAMPLE(mode)) {
if (!__glutIsSupportedByGLX("GLX_SGIS_multisample"))
return NULL;
list[n++] = GLX_SAMPLES_SGIS;
/* XXX Is 4 a reasonable minimum acceptable number of
samples? */
list[n++] = 4;
}
#endif
list[n] = (int) None; /* terminate list */
return glXChooseVisual(__glutDisplay,
__glutScreen, list);
}
