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- /* Copyright (c) Mark J. Kilgard, 1994. */
-
- /* 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 <stdlib.h>
- #include <string.h>
- #include <stdio.h>
- #include <X11/Xlib.h>
-
- #include <GL/glut.h>
- #include "glutint.h"
-
- /* GLUT inter-file variables */
- /* *INDENT-OFF* */
- char *__glutProgramName = NULL;
- int __glutArgc = 0;
- char **__glutArgv = NULL;
- char *__glutGeometry = NULL;
- Display *__glutDisplay = NULL;
- int __glutScreen;
- Window __glutRoot;
- int __glutScreenHeight;
- int __glutScreenWidth;
- GLboolean __glutIconic = GL_FALSE;
- GLboolean __glutDebug = GL_FALSE;
- unsigned int __glutDisplayMode =
- GLUT_RGB | GLUT_SINGLE | GLUT_DEPTH;
- int __glutConnectionFD;
- XSizeHints __glutSizeHints = {0};
- int __glutInitWidth = 300, __glutInitHeight = 300;
- int __glutInitX = -1, __glutInitY = -1;
- GLboolean __glutForceDirect = GL_FALSE,
- __glutTryDirect = GL_TRUE;
- Atom __glutWMDeleteWindow;
- /* *INDENT-ON* */
-
- static Bool synchronize = False;
-
- #if defined(__vms)
- char *
- strdup(const char *string)
- {
- char *new;
-
- new = malloc(strlen(string) + 1);
- if (new == NULL)
- return NULL;
- strcpy(new, string);
- return new;
- }
- #endif
-
- void
- __glutOpenXConnection(char *display)
- {
- int errorBase, eventBase;
-
- __glutDisplay = XOpenDisplay(display);
- if (!__glutDisplay)
- __glutFatalError("could not open display: %s",
- XDisplayName(display));
- if (synchronize)
- XSynchronize(__glutDisplay, True);
- if (!glXQueryExtension(__glutDisplay, &errorBase, &eventBase))
- __glutFatalError(
- "OpenGL GLX extension not supported by display: %s",
- XDisplayName(display));
- __glutScreen = DefaultScreen(__glutDisplay);
- __glutRoot = RootWindow(__glutDisplay, __glutScreen);
- __glutScreenWidth = DisplayWidth(__glutDisplay, __glutScreen);
- __glutScreenHeight = DisplayHeight(__glutDisplay,
- __glutScreen);
- __glutConnectionFD = ConnectionNumber(__glutDisplay);
- __glutWMDeleteWindow = XInternAtom(__glutDisplay,
- "WM_DELETE_WINDOW", False);
- }
-
- void
- __glutInitTime(struct timeval *beginning)
- {
- static int beenhere = 0;
- static struct timeval genesis;
-
- if (!beenhere) {
- GETTIMEOFDAY(&genesis);
- beenhere = 1;
- }
- *beginning = genesis;
- }
-
- static void
- removeArgs(int *argcp, char **argv, int numToRemove)
- {
- int i, j;
-
- for (i = 0, j = numToRemove; argv[j]; i++, j++) {
- argv[i] = argv[j];
- }
- argv[i] = NULL;
- *argcp -= numToRemove;
- }
-
- void
- glutInit(int *argcp, char **argv)
- {
- char *display = NULL;
- char *str;
- struct timeval unused;
- int i;
-
- if (__glutDisplay) {
- __glutWarning("glutInit being called a second time.");
- return;
- }
- /* determine temporary program name */
- str = strrchr(argv[0], '/');
- if (str == NULL) {
- __glutProgramName = argv[0];
- } else {
- __glutProgramName = str + 1;
- }
-
- /* make private copy of command line arguments */
- __glutArgc = *argcp;
- __glutArgv = (char **) malloc(__glutArgc * sizeof(char *));
- if (!__glutArgv)
- __glutFatalError("out of memory.");
- for (i = 0; i < __glutArgc; i++) {
- __glutArgv[i] = strdup(argv[i]);
- if (!__glutArgv[i])
- __glutFatalError("out of memory.");
- }
-
- /* determine permanent program name */
- str = strrchr(__glutArgv[0], '/');
- if (str == NULL) {
- __glutProgramName = __glutArgv[0];
- } else {
- __glutProgramName = str + 1;
- }
-
- /* parse arguments for standard options */
- for (i = 1; i < __glutArgc; i++) {
- if (!strcmp(__glutArgv[i], "-display")) {
- if (++i >= __glutArgc) {
- __glutFatalError(
- "follow -display option with X display name.");
- }
- display = __glutArgv[i];
- removeArgs(argcp, &argv[1], 2);
- } else if (!strcmp(__glutArgv[i], "-geometry")) {
- int flags, x, y, width, height;
-
- if (++i >= __glutArgc) {
- __glutFatalError(
- "follow -geometry option with geometry parameter.");
- }
- /* Fix bogus "{width|height} may be used before set"
- warning */
- width = 0;
- height = 0;
-
- flags = XParseGeometry(__glutArgv[i], &x, &y,
- (unsigned int *) &width, (unsigned int *) &height);
- if (WidthValue & flags) {
- /* Careful because X does not allow zero or negative
- width windows */
- if (width > 0)
- __glutInitWidth = width;
- }
- if (HeightValue & flags) {
- /* Careful because X does not allow zero or negative
- height windows */
- if (height > 0)
- __glutInitHeight = height;
- }
- glutInitWindowSize(__glutInitWidth, __glutInitHeight);
- if (XValue & flags) {
- if (XNegative & flags)
- x = DisplayWidth(__glutDisplay, __glutScreen) +
- x - __glutSizeHints.width;
- /* Play safe: reject negative X locations */
- if (x >= 0)
- __glutInitX = x;
- }
- if (YValue & flags) {
- if (YNegative & flags)
- y = DisplayHeight(__glutDisplay, __glutScreen) +
- y - __glutSizeHints.height;
- /* Play safe: reject negative Y locations */
- if (y >= 0)
- __glutInitY = y;
- }
- glutInitWindowPosition(__glutInitX, __glutInitY);
- removeArgs(argcp, &argv[1], 2);
- } else if (!strcmp(__glutArgv[i], "-direct")) {
- if (!__glutTryDirect)
- __glutFatalError(
- "cannot force both direct and indirect rendering.");
- __glutForceDirect = GL_TRUE;
- removeArgs(argcp, &argv[1], 1);
- } else if (!strcmp(__glutArgv[i], "-indirect")) {
- if (__glutForceDirect)
- __glutFatalError(
- "cannot force both direct and indirect rendering.");
- __glutTryDirect = GL_FALSE;
- removeArgs(argcp, &argv[1], 1);
- } else if (!strcmp(__glutArgv[i], "-iconic")) {
- __glutIconic = GL_TRUE;
- removeArgs(argcp, &argv[1], 1);
- } else if (!strcmp(__glutArgv[i], "-gldebug")) {
- __glutDebug = GL_TRUE;
- removeArgs(argcp, &argv[1], 1);
- } else if (!strcmp(__glutArgv[i], "-sync")) {
- synchronize = GL_TRUE;
- removeArgs(argcp, &argv[1], 1);
- } else {
- /* once unknown option encountered, stop command line
- processing */
- break;
- }
- }
- __glutOpenXConnection(display);
- __glutInitTime(&unused);
- }
-
- /* CENTRY */
- void
- glutInitWindowPosition(int x, int y)
- {
- __glutInitX = x;
- __glutInitY = y;
- if (x >= 0 && y >= 0) {
- __glutSizeHints.x = x;
- __glutSizeHints.y = y;
- __glutSizeHints.flags |= USPosition;
- } else {
- __glutSizeHints.flags &= ~USPosition;
- }
- }
-
- void
- glutInitWindowSize(int width, int height)
- {
- __glutInitWidth = width;
- __glutInitHeight = height;
- if (width > 0 && height > 0) {
- __glutSizeHints.width = width;
- __glutSizeHints.height = height;
- __glutSizeHints.flags |= USSize;
- } else {
- __glutSizeHints.flags &= ~USSize;
- }
- }
-
- void
- glutInitDisplayMode(unsigned int mask)
- {
- __glutDisplayMode = mask;
- }
-
- /* ENDCENTRY */
-