From a4dcdcf0ffae4c6cf52354fbd63c95d7d7815fd9 Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Thu, 19 Aug 1999 13:57:42 +0000 Subject: initial check-in (post crash) --- src/glut/glx/glut_gamemode.c | 674 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 674 insertions(+) create mode 100644 src/glut/glx/glut_gamemode.c (limited to 'src/glut/glx/glut_gamemode.c') diff --git a/src/glut/glx/glut_gamemode.c b/src/glut/glx/glut_gamemode.c new file mode 100644 index 00000000000..b685ce33e2a --- /dev/null +++ b/src/glut/glx/glut_gamemode.c @@ -0,0 +1,674 @@ + +/* Copyright (c) Mark J. Kilgard, 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 +#include +#include +#include + +#include "glutint.h" + +#ifndef _WIN32 +#include +#include + +/* SGI optimization introduced in IRIX 6.3 to avoid X server + round trips for interning common X atoms. */ +#if defined(_SGI_EXTRA_PREDEFINES) && !defined(NO_FAST_ATOMS) +#include +#else +#define XSGIFastInternAtom(dpy,string,fast_name,how) XInternAtom(dpy,string,how) +#endif +#endif /* not _WIN32 */ + +int __glutDisplaySettingsChanged = 0; +static DisplayMode *dmodes, *currentDm = NULL; +static int ndmodes = -1; +GLUTwindow *__glutGameModeWindow = NULL; + +#ifdef TEST +static char *compstr[] = +{ + "none", "=", "!=", "<=", ">=", ">", "<", "~" +}; +static char *capstr[] = +{ + "width", "height", "bpp", "hertz", "num" +}; +#endif + +void __cdecl +__glutCloseDownGameMode(void) +{ + if (__glutDisplaySettingsChanged) { +#ifdef _WIN32 + /* Assumes that display settings have been changed, that + is __glutDisplaySettingsChanged is true. */ + ChangeDisplaySettings(NULL, 0); +#endif + __glutDisplaySettingsChanged = 0; + } + __glutGameModeWindow = NULL; +} + +void APIENTRY +glutLeaveGameMode(void) +{ + if (__glutGameModeWindow == NULL) { + __glutWarning("not in game mode so cannot leave game mode"); + return; + } + __glutDestroyWindow(__glutGameModeWindow, + __glutGameModeWindow); + XFlush(__glutDisplay); + __glutGameModeWindow = NULL; +} + +#ifdef _WIN32 + +/* Same values as from MSDN's SetDisp.c example. */ +#define MIN_WIDTH 400 +#define MIN_FREQUENCY 60 + +static void +initGameModeSupport(void) +{ + DEVMODE dm; + DWORD mode; + int i; + + if (ndmodes >= 0) { + /* ndmodes is initially -1 to indicate no + dmodes allocated yet. */ + return; + } + + /* Determine how many display modes there are. */ + ndmodes = 0; + mode = 0; + while (EnumDisplaySettings(NULL, mode, &dm)) { + if (dm.dmPelsWidth >= MIN_WIDTH && + (dm.dmDisplayFrequency == 0 || + dm.dmDisplayFrequency >= MIN_FREQUENCY)) { + ndmodes++; + } + mode++; + } + + /* Allocate memory for a list of all the display modes. */ + dmodes = (DisplayMode*) + malloc(ndmodes * sizeof(DisplayMode)); + + /* Now that we know how many display modes to expect, + enumerate them again and save the information in + the list we allocated above. */ + i = 0; + mode = 0; + while (EnumDisplaySettings(NULL, mode, &dm)) { + /* Try to reject any display settings that seem unplausible. */ + if (dm.dmPelsWidth >= MIN_WIDTH && + (dm.dmDisplayFrequency == 0 || + dm.dmDisplayFrequency >= MIN_FREQUENCY)) { + dmodes[i].devmode = dm; + dmodes[i].valid = 1; /* XXX Not used for now. */ + dmodes[i].cap[DM_WIDTH] = dm.dmPelsWidth; + dmodes[i].cap[DM_HEIGHT] = dm.dmPelsHeight; + dmodes[i].cap[DM_PIXEL_DEPTH] = dm.dmBitsPerPel; + if (dm.dmDisplayFrequency == 0) { + /* Guess a reasonable guess. */ + /* Lame Windows 95 version of EnumDisplaySettings. */ + dmodes[i].cap[DM_HERTZ] = 60; + } else { + dmodes[i].cap[DM_HERTZ] = dm.dmDisplayFrequency; + } + i++; + } + mode++; + } + + assert(i == ndmodes); +} + +#else + +/* X Windows version of initGameModeSupport. */ +static void +initGameModeSupport(void) +{ + if (ndmodes >= 0) { + /* ndmodes is initially -1 to indicate no + dmodes allocated yet. */ + return; + } + + /* Determine how many display modes there are. */ + ndmodes = 0; +} + +#endif + +/* This routine is based on similiar code in glut_dstr.c */ +static DisplayMode * +findMatch(DisplayMode * dmodes, int ndmodes, + Criterion * criteria, int ncriteria) +{ + DisplayMode *found; + int *bestScore, *thisScore; + int i, j, numok, result, worse, better; + + found = NULL; + numok = 1; /* "num" capability is indexed from 1, + not 0. */ + + /* XXX alloca canidate. */ + bestScore = (int *) malloc(ncriteria * sizeof(int)); + if (!bestScore) { + __glutFatalError("out of memory."); + } + for (j = 0; j < ncriteria; j++) { + /* Very negative number. */ + bestScore[j] = -32768; + } + + /* XXX alloca canidate. */ + thisScore = (int *) malloc(ncriteria * sizeof(int)); + if (!thisScore) { + __glutFatalError("out of memory."); + } + + for (i = 0; i < ndmodes; i++) { + if (dmodes[i].valid) { + worse = 0; + better = 0; + + for (j = 0; j < ncriteria; j++) { + int cap, cvalue, dvalue; + + cap = criteria[j].capability; + cvalue = criteria[j].value; + if (cap == NUM) { + dvalue = numok; + } else { + dvalue = dmodes[i].cap[cap]; + } +#ifdef TEST + if (verbose) + printf(" %s %s %d to %d\n", + capstr[cap], compstr[criteria[j].comparison], cvalue, dvalue); +#endif + switch (criteria[j].comparison) { + case EQ: + result = cvalue == dvalue; + thisScore[j] = 1; + break; + case NEQ: + result = cvalue != dvalue; + thisScore[j] = 1; + break; + case LT: + result = dvalue < cvalue; + thisScore[j] = dvalue - cvalue; + break; + case GT: + result = dvalue > cvalue; + thisScore[j] = dvalue - cvalue; + break; + case LTE: + result = dvalue <= cvalue; + thisScore[j] = dvalue - cvalue; + break; + case GTE: + result = (dvalue >= cvalue); + thisScore[j] = dvalue - cvalue; + break; + case MIN: + result = dvalue >= cvalue; + thisScore[j] = cvalue - dvalue; + break; + } + +#ifdef TEST + if (verbose) + printf(" result=%d score=%d bestScore=%d\n", result, thisScore[j], bestScore[j]); +#endif + + if (result) { + if (better || thisScore[j] > bestScore[j]) { + better = 1; + } else if (thisScore[j] == bestScore[j]) { + /* Keep looking. */ + } else { + goto nextDM; + } + } else { + if (cap == NUM) { + worse = 1; + } else { + goto nextDM; + } + } + + } + + if (better && !worse) { + found = &dmodes[i]; + for (j = 0; j < ncriteria; j++) { + bestScore[j] = thisScore[j]; + } + } + numok++; + + nextDM:; + + } + } + free(bestScore); + free(thisScore); + return found; +} + +/** + * Parses strings in the form of: + * 800x600 + * 800x600:16 + * 800x600@60 + * 800x600:16@60 + * @60 + * :16 + * :16@60 + * NOTE that @ before : is not parsed. + */ +static int +specialCaseParse(char *word, Criterion * criterion, int mask) +{ + char *xstr, *response; + int got; + int width, height, bpp, hertz; + + switch(word[0]) { + case '0': + case '1': + case '2': + case '3': + case '4': + case '5': + case '6': + case '7': + case '8': + case '9': + /* The WWWxHHH case. */ + if (mask & (1 << DM_WIDTH)) { + return -1; + } + xstr = strpbrk(&word[1], "x"); + if (xstr) { + width = (int) strtol(word, &response, 0); + if (response == word || response[0] != 'x') { + /* Not a valid number OR needs to be followed by 'x'. */ + return -1; + } + height = (int) strtol(&xstr[1], &response, 0); + if (response == &xstr[1]) { + /* Not a valid number. */ + return -1; + } + criterion[0].capability = DM_WIDTH; + criterion[0].comparison = EQ; + criterion[0].value = width; + criterion[1].capability = DM_HEIGHT; + criterion[1].comparison = EQ; + criterion[1].value = height; + got = specialCaseParse(response, + &criterion[2], 1 << DM_WIDTH); + if (got >= 0) { + return got + 2; + } else { + return -1; + } + } + return -1; + case ':': + /* The :BPP case. */ + if (mask & (1 << DM_PIXEL_DEPTH)) { + return -1; + } + bpp = (int) strtol(&word[1], &response, 0); + if (response == &word[1]) { + /* Not a valid number. */ + return -1; + } + criterion[0].capability = DM_PIXEL_DEPTH; + criterion[0].comparison = EQ; + criterion[0].value = bpp; + got = specialCaseParse(response, + &criterion[1], 1 << DM_WIDTH | 1 << DM_PIXEL_DEPTH); + if (got >= 0) { + return got + 1; + } else { + return -1; + } + case '@': + /* The @HZ case. */ + if (mask & (1 << DM_HERTZ)) { + return -1; + } + hertz = (int) strtol(&word[1], &response, 0); + if (response == &word[1]) { + /* Not a valid number. */ + return -1; + } + criterion[0].capability = DM_HERTZ; + criterion[0].comparison = EQ; + criterion[0].value = hertz; + got = specialCaseParse(response, + &criterion[1], ~DM_HERTZ); + if (got >= 0) { + return got + 1; + } else { + return -1; + } + case '\0': + return 0; + } + return -1; +} + +/* This routine is based on similiar code in glut_dstr.c */ +static int +parseCriteria(char *word, Criterion * criterion) +{ + char *cstr, *vstr, *response; + int comparator, value; + + cstr = strpbrk(word, "=>': + if (cstr[1] == '=') { + comparator = GTE; + vstr = &cstr[2]; + } else { + comparator = GT; + vstr = &cstr[1]; + } + break; + case '<': + if (cstr[1] == '=') { + comparator = LTE; + vstr = &cstr[2]; + } else { + comparator = LT; + vstr = &cstr[1]; + } + break; + case '!': + if (cstr[1] == '=') { + comparator = NEQ; + vstr = &cstr[2]; + } else { + return -1; + } + break; + default: + return -1; + } + value = (int) strtol(vstr, &response, 0); + if (response == vstr) { + /* Not a valid number. */ + return -1; + } + *cstr = '\0'; + } else { + comparator = NONE; + } + switch (word[0]) { + case 'b': + if (!strcmp(word, "bpp")) { + criterion[0].capability = DM_PIXEL_DEPTH; + if (comparator == NONE) { + return -1; + } else { + criterion[0].comparison = comparator; + criterion[0].value = value; + return 1; + } + } + return -1; + case 'h': + if (!strcmp(word, "height")) { + criterion[0].capability = DM_HEIGHT; + if (comparator == NONE) { + return -1; + } else { + criterion[0].comparison = comparator; + criterion[0].value = value; + return 1; + } + } + if (!strcmp(word, "hertz")) { + criterion[0].capability = DM_HERTZ; + if (comparator == NONE) { + return -1; + } else { + criterion[0].comparison = comparator; + criterion[0].value = value; + return 1; + } + } + return -1; + case 'n': + if (!strcmp(word, "num")) { + criterion[0].capability = DM_NUM; + if (comparator == NONE) { + return -1; + } else { + criterion[0].comparison = comparator; + criterion[0].value = value; + return 1; + } + } + return -1; + case 'w': + if (!strcmp(word, "width")) { + criterion[0].capability = DM_WIDTH; + if (comparator == NONE) { + return -1; + } else { + criterion[0].comparison = comparator; + criterion[0].value = value; + return 1; + } + } + return -1; + } + if (comparator == NONE) { + return specialCaseParse(word, criterion, 0); + } + return -1; +} + +/* This routine is based on similiar code in glut_dstr.c */ +static Criterion * +parseDisplayString(const char *display, int *ncriteria) +{ + Criterion *criteria = NULL; + int n, parsed; + char *copy, *word; + + copy = __glutStrdup(display); + /* Attempt to estimate how many criteria entries should be + needed. */ + n = 0; + word = strtok(copy, " \t"); + while (word) { + n++; + word = strtok(NULL, " \t"); + } + /* Allocate number of words of criteria. A word + could contain as many as four criteria in the + worst case. Example: 800x600:16@60 */ + criteria = (Criterion *) malloc(4 * n * sizeof(Criterion)); + if (!criteria) { + __glutFatalError("out of memory."); + } + + /* Re-copy the copy of the display string. */ + strcpy(copy, display); + + n = 0; + word = strtok(copy, " \t"); + while (word) { + parsed = parseCriteria(word, &criteria[n]); + if (parsed >= 0) { + n += parsed; + } else { + __glutWarning("Unrecognized game mode string word: %s (ignoring)\n", word); + } + word = strtok(NULL, " \t"); + } + + free(copy); + *ncriteria = n; + return criteria; +} + +void APIENTRY +glutGameModeString(const char *string) +{ + Criterion *criteria; + int ncriteria; + + initGameModeSupport(); + criteria = parseDisplayString(string, &ncriteria); + currentDm = findMatch(dmodes, ndmodes, criteria, ncriteria); + free(criteria); +} + +int APIENTRY +glutEnterGameMode(void) +{ + GLUTwindow *window; + int width, height; + Window win; + + if (__glutMappedMenu) { + __glutFatalUsage("entering game mode not allowed while menus in use"); + } + if (__glutGameModeWindow) { + /* Already in game mode, so blow away game mode + window so apps can change resolutions. */ + window = __glutGameModeWindow; + /* Setting the game mode window to NULL tricks + the window destroy code into not undoing the + screen display change since we plan on immediately + doing another mode change. */ + __glutGameModeWindow = NULL; + __glutDestroyWindow(window, window); + } + + /* Assume default screen size until we find out if we + can actually change the display settings. */ + width = __glutScreenWidth; + height = __glutScreenHeight; + + if (currentDm) { +#ifdef _WIN32 + LONG status; + static int registered = 0; + + status = ChangeDisplaySettings(¤tDm->devmode, + CDS_FULLSCREEN); + if (status == DISP_CHANGE_SUCCESSFUL) { + __glutDisplaySettingsChanged = 1; + width = currentDm->cap[DM_WIDTH]; + height = currentDm->cap[DM_HEIGHT]; + if (!registered) { + atexit(__glutCloseDownGameMode); + registered = 1; + } + } else { + /* Switch back to default resolution. */ + ChangeDisplaySettings(NULL, 0); + } +#endif + } + + window = __glutCreateWindow(NULL, 0, 0, + width, height, /* game mode */ 1); + win = window->win; + +#if !defined(_WIN32) + if (__glutMotifHints == None) { + __glutMotifHints = XSGIFastInternAtom(__glutDisplay, "_MOTIF_WM_HINTS", + SGI_XA__MOTIF_WM_HINTS, 0); + if (__glutMotifHints == None) { + __glutWarning("Could not intern X atom for _MOTIF_WM_HINTS."); + } + } + + /* Game mode window is a toplevel window. */ + XSetWMProtocols(__glutDisplay, win, &__glutWMDeleteWindow, 1); +#endif + + /* Schedule the fullscreen property to be added and to + make sure the window is configured right. Win32 + doesn't need this. */ + window->desiredX = 0; + window->desiredY = 0; + window->desiredWidth = width; + window->desiredHeight = height; + window->desiredConfMask |= CWX | CWY | CWWidth | CWHeight; +#ifdef _WIN32 + /* Win32 does not want to use GLUT_FULL_SCREEN_WORK + for game mode because we need to be maximizing + the window in game mode, not just sizing it to + take up the full screen. The Win32-ness of game + mode happens when you pass 1 in the gameMode parameter + to __glutCreateWindow above. A gameMode of creates + a WS_POPUP window, not a standard WS_OVERLAPPEDWINDOW + window. WS_POPUP ensures the taskbar is hidden. */ + __glutPutOnWorkList(window, + GLUT_CONFIGURE_WORK); +#else + __glutPutOnWorkList(window, + GLUT_CONFIGURE_WORK | GLUT_FULL_SCREEN_WORK); +#endif + + __glutGameModeWindow = window; + return window->num + 1; +} + +int APIENTRY +glutGameModeGet(GLenum mode) +{ + switch (mode) { + case GLUT_GAME_MODE_ACTIVE: + return __glutGameModeWindow != NULL; + case GLUT_GAME_MODE_POSSIBLE: + return currentDm != NULL; + case GLUT_GAME_MODE_WIDTH: + return currentDm ? currentDm->cap[DM_WIDTH] : -1; + case GLUT_GAME_MODE_HEIGHT: + return currentDm ? currentDm->cap[DM_HEIGHT] : -1; + case GLUT_GAME_MODE_PIXEL_DEPTH: + return currentDm ? currentDm->cap[DM_PIXEL_DEPTH] : -1; + case GLUT_GAME_MODE_REFRESH_RATE: + return currentDm ? currentDm->cap[DM_HERTZ] : -1; + case GLUT_GAME_MODE_DISPLAY_CHANGED: + return __glutDisplaySettingsChanged; + default: + return -1; + } +} -- cgit v1.2.3