glut_get.c
上传用户:xk288cn
上传日期:2007-05-28
资源大小:4876k
文件大小:6k
- /* Copyright (c) Mark J. Kilgard, 1994, 1997, 1998. */
- /* This program is freely distributable without licensing fees
- and is provided without guarantee or warrantee expressed or
- implied. This program is -not- in the public domain. */
- #include <assert.h>
- #include <stdlib.h> /* SunOS 4 needs NULL defined for GETTIMEOFDAY macro. */
- #include "glutint.h"
- /* CENTRY */
- int APIENTRY
- 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;
- #define GET_CONFIG(attrib) {
- if (__glutCurrentWindow->renderWin == __glutCurrentWindow->win) {
- glXGetConfig(__glutDisplay, __glutCurrentWindow->vis,
- attrib, &value);
- } else {
- glXGetConfig(__glutDisplay, __glutCurrentWindow->overlay->vis,
- attrib, &value);
- }
- }
- 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)
- /* 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:
- {
- struct timeval elapsed, beginning, now;
- __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(_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;
- }
- }
- /* ENDCENTRY */