screen.cpp

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/***************************************************************************
                           screen.cpp -- screen init
                             -------------------
    created              : Fri Aug 13 22:29:56 CEST 1999
    copyright            : (C) 1999-2024 by Eric Espie, Bernhard Wymann
    email                : berniw@bluewin.ch
***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/

#include <stdio.h>
#ifdef WIN32
#include <windows.h>
#endif
#include <GL/glut.h>
#include <math.h>
#ifndef WIN32
#include <unistd.h>
#else
#include <process.h>
#endif /* WIN32 */

#include <tgfclient.h>
#include <portability.h>
#include <musicplayer/musicplayer.h>
#include <portability.h>

#include "gui.h"
#include "fg_gm.h"
#include "glfeatures.h"

//#ifndef WIN32
//#define USE_RANDR_EXT
//#endif // WIN32

#ifdef USE_RANDR_EXT
#include <GL/glx.h>
#include <X11/Xlib.h>
#include <X11/Xatom.h>
#include <X11/keysym.h>
#include <X11/extensions/Xrandr.h>
#endif // USE_RANDR_EXT

static int GfScrWidth;
static int GfScrHeight;
static int GfViewWidth;
static int GfViewHeight;
static int GfScrCenX;
static int GfScrCenY;

static void *scrHandle = NULL;

static int usedGM = 0;
#if !defined(FREEGLUT) && !defined(WIN32)
static int usedFG = 0;
#endif

#ifdef USE_RANDR_EXT
static char **Res = NULL;
static int nbRes = 0;
#else // USE_RANDR_EXT
static char *Res[] = {
    "640x480",
    "800x600",
    "1024x768",
    "1152x768",
    "1152x864",
    "1200x854",
    "1200x960",
    "1280x720",
    "1280x1024",
    "1400x900",
    "1600x900",
    "1600x1200",
    "1680x1050",
    "1920x1080",
    "2560x1080",
    "3840x1080",
    "1920x1200",
    "2560x1440",
    "3440x1440",
    "5120x1440",
    "4096x2160",
    "5040x2160",
    "8192x2160",
    "320x200"
};
static const int nbRes = sizeof(Res) / sizeof(Res[0]);
#endif // USE_RANDR_EXT

static const char *Mode[] = {"Full-screen mode", "Window mode"};
static const char *VInit[] = {GFSCR_VAL_VINIT_COMPATIBLE, GFSCR_VAL_VINIT_BEST};
static const char *Depthlist[] = {"24", "32", "16"};

//static const int nbRes = sizeof(Res) / sizeof(Res[0]);
static const int nbMode = sizeof(Mode) / sizeof(Mode[0]);
static const int nbVInit = sizeof(VInit) / sizeof(VInit[0]);
static const int nbDepth = sizeof(Depthlist) / sizeof(Depthlist[0]);

static int  curRes = 0;
static int  curMode = 0;
static int  curDepth = 0;
static int curVInit = 0;

static int  curMaxFreq = 75;
#ifdef WIN32
static int  MaxFreqId;
#endif

static int  ResLabelId;
static int  DepthLabelId;
static int  ModeLabelId;
static int VInitLabelId;

static float LabelColor[] = {1.0, 0.0, 1.0, 1.0};


void
gfScreenInit(void)
{
#ifdef USE_RANDR_EXT
    // Get display, screen and root window handles.
    const char *displayname = getenv("DISPLAY");
    if (displayname == NULL) {
        displayname = strdup(":0.0");
    }

    Display *display = XOpenDisplay(displayname);

    if( display != NULL) {
        // If we have a display fill in the resolutions advertised by Xrandr.
        int screen = DefaultScreen(display);
        Window root = RootWindow(display, screen);

        XRRScreenConfiguration *screenconfig = XRRGetScreenInfo (display, root);
        if (screenconfig != NULL) {
            int i, j, nsize;
            XRRScreenSize *sizes = XRRConfigSizes(screenconfig, &nsize);

            if (nsize > 0) {
                // Check if 320x200, 640x480, 800x600 are available, construct a mode wish list.
                int check_resx[] = {320, 640, 800};
                int check_resy[] = {240, 480, 600};
                bool mode_in_list[] = {false, false, false};
                int add_modes = sizeof(check_resx)/sizeof(check_resx[0]);

                for (i = 0; i < nsize; i++) {
                    for (j = 0; j < 3; j++) {
                        if ((mode_in_list[j] == false) && (sizes[i].width == check_resx[j])) {
                            if (sizes[i].height == check_resy[j]) {
                                // Mode already in list.
                                mode_in_list[j] = true;
                                add_modes--;
                            }
                        }
                    }
                }

                const int bufsize = 20;
                char buffer[bufsize];
                Res = (char**) malloc(sizeof(char *)*(nsize+add_modes));
                int resx[nsize+add_modes];
                int resy[nsize+add_modes];
                for (i = 0; i < nsize+add_modes; i++) {
                    if (i < nsize) {
                        // Add mode from screenconfig (system).
                        snprintf(buffer, bufsize, "%dx%d", sizes[i].width, sizes[i].height);
                        Res[i] = strndup(buffer, bufsize);
                        resx[i] = sizes[i].width;
                        resy[i] = sizes[i].height;
                    } else {
                        // Add mode from wish list.
                        unsigned int j;
                        for (j = 0; j < sizeof(check_resx)/sizeof(check_resx[0]); j++) {
                            if (mode_in_list[j] == false) {
                                mode_in_list[j] = true;
                                snprintf(buffer, bufsize, "%dx%d", check_resx[j], check_resy[j]);
                                Res[i] = strndup(buffer, bufsize);
                                resx[i] = check_resx[j];
                                resy[i] = check_resy[j];
                                break;
                            }
                        }
                    }

                    // Stupid sorting (not much elements, don't worry).
                    int j;
                    for (j = i; j > 0; j--) {
                        if ((resx[j] < resx[j-1]) ||
                            (resx[j] == resx[j-1] && resy[j] < resy[j-1]))
                        {
                            int tx, ty;
                            char *tc;
                            tx = resx[j-1];
                            ty = resy[j-1];
                            resx[j-1] = resx[j];
                            resy[j-1] = resy[j];
                            resx[j] = tx;
                            resy[j] = ty;
                            tc = Res[j-1];
                            Res[j-1] = Res[j];
                            Res[j] = tc;
                        } else {
                            break;
                        }
                    }
                }

                nbRes = nsize + add_modes;
            }

            XRRFreeScreenConfigInfo(screenconfig);
        }
        XCloseDisplay(display);
    }

    if (Res == NULL || nbRes == 0) {
        // We failed to get a handle to the display, so fill in some defaults.
        GfOut("Failed to initialize resolutions for display '%s'", XDisplayName(displayname));
        nbRes = 8;
        Res = (char **) malloc(sizeof(char *)*nbRes);
        Res[0] = strdup("640x480");
        Res[1] = strdup("800x600");
        Res[2] = strdup("1024x768");
        Res[3] = strdup("1152x864");
        Res[4] = strdup("1200x960");
        Res[5] = strdup("1280x1024");
        Res[6] = strdup("1600x1200");
        Res[7] = strdup("320x200");
    }
#endif // USE_RANDR_EXT
}

static void Reshape(int width, int height)
{
    glViewport( (width-GfViewWidth)/2, (height-GfViewHeight)/2, GfViewWidth,  GfViewHeight);
    glMatrixMode( GL_PROJECTION );
    glLoadIdentity();
    glOrtho( 0.0, 640.0, 0.0, 480.0, -1.0, 1.0 );
    glMatrixMode( GL_MODELVIEW );
    glLoadIdentity();

    GfScrWidth = width;
    GfScrHeight = height;
    GfScrCenX = width / 2;
    GfScrCenY = height / 2;
}

void GfScrInit(int argc, char *argv[])
{
    int Window;
    int xw, yw;
    int winX, winY;
    void *handle;
    int fullscreen;
    int maxfreq;
    int i, depth;
    const int BUFSIZE = 1024;
    char buf[BUFSIZE];
    
    snprintf(buf, BUFSIZE, "%s%s", GetLocalDir(), GFSCR_CONF_FILE);
    handle = GfParmReadFile(buf, GFPARM_RMODE_STD | GFPARM_RMODE_CREAT);
    xw = (int)GfParmGetNum(handle, GFSCR_SECT_PROP, GFSCR_ATT_X, (char*)NULL, 640);
    yw = (int)GfParmGetNum(handle, GFSCR_SECT_PROP, GFSCR_ATT_Y, (char*)NULL, 480);
    winX = (int)GfParmGetNum(handle, GFSCR_SECT_PROP, GFSCR_ATT_WIN_X, (char*)NULL, xw);
    winY = (int)GfParmGetNum(handle, GFSCR_SECT_PROP, GFSCR_ATT_WIN_Y, (char*)NULL, yw);
    depth = (int)GfParmGetNum(handle, GFSCR_SECT_PROP, GFSCR_ATT_BPP, (char*)NULL, 32);
    maxfreq = (int)GfParmGetNum(handle, GFSCR_SECT_PROP, GFSCR_ATT_MAXREFRESH, (char*)NULL, 160);
    GfViewWidth = xw;
    GfViewHeight = yw;
    GfScrCenX = xw / 2;
    GfScrCenY = yw / 2;

    // The fullscreen hack must be run before glutInit, such that glut gets the right screen size, etc.
    const char* fscr = GfParmGetStr(handle, GFSCR_SECT_PROP, GFSCR_ATT_FSCR, GFSCR_VAL_NO);
    fullscreen = 0;
#if !defined(FREEGLUT) && !defined(WIN32)
    if (strcmp(fscr, GFSCR_VAL_YES) == 0) { // Resize the screen
        GfOut ("Freeglut not detected...\n");
        for (i = maxfreq; i > 59; i--) {
            snprintf(buf, BUFSIZE, "%dx%d:%d@%d", winX, winY, depth, i);
            GfOut("Trying %s mode\n", buf);
            fglutGameModeString(buf);
            if (fglutEnterGameMode()) {
                GfOut("OK done for %s\n", buf);
                usedFG = 1;
                break;
            }
        }
    }
#endif

    const char* vinit = GfParmGetStr(handle, GFSCR_SECT_PROP, GFSCR_ATT_VINIT, GFSCR_VAL_VINIT_COMPATIBLE);

    glutInit(&argc, argv);

    // Depending on "video mode init" setting try to get the best mode or try to get a mode in a safe way...
    // This is a workaround for driver/glut/glx bug, which lie about the capabilites of the visual.

    if (strcmp(vinit, GFSCR_VAL_VINIT_BEST) == 0) {

        // Try to get "best" videomode, z-buffer >= 24bit, visual with alpha channel,
        // antialiasing support.

        int visualDepthBits = 24;
        bool visualSupportsMultisample = true;
        bool visualSupportsAlpha = true;

        glutInitDisplayString("rgba double depth>=24 samples alpha");

        if (!glutGet(GLUT_DISPLAY_MODE_POSSIBLE)) {
            // Failed, try without antialiasing support.
            visualDepthBits = 24;
            visualSupportsMultisample = false;
            visualSupportsAlpha = true;
            glutInitDisplayString("rgba double depth>=24 alpha");
        }

        if (!glutGet(GLUT_DISPLAY_MODE_POSSIBLE)) {
            // Failed, try without alpha channel.
            visualDepthBits = 24;
            visualSupportsMultisample = true;
            visualSupportsAlpha = false;
            glutInitDisplayString("rgb double depth>=24 samples");
        }

        if (!glutGet(GLUT_DISPLAY_MODE_POSSIBLE)) {
            // Failed, try without antialiasing and alpha support.
            visualDepthBits = 24;
            visualSupportsMultisample = false;
            visualSupportsAlpha = false;
            glutInitDisplayString("rgb double depth>=24");
        }

        if (!glutGet(GLUT_DISPLAY_MODE_POSSIBLE)) {
            // Failed, try without 24 bit z-Buffer and without antialiasing.
            visualDepthBits = 16;
            visualSupportsMultisample = false;
            visualSupportsAlpha = true;
            glutInitDisplayString("rgba double depth>=16 alpha");
        }

        if (!glutGet(GLUT_DISPLAY_MODE_POSSIBLE)) {
            // Failed, try without 24 bit z-Buffer, without antialiasing and without alpha.
            visualDepthBits = 16;
            visualSupportsMultisample = false;
            visualSupportsAlpha = false;
            glutInitDisplayString("rgb double depth>=16");
        }

        printf("Visual Properties Report\n");
        printf("------------------------\n");

        if (!glutGet(GLUT_DISPLAY_MODE_POSSIBLE)) {
            // All failed.
            printf("The minimum display requirements are not fulfilled.\n");
            printf("We need a double buffered RGB visual with a 16 bit depth buffer at least.\n");
            // Try fallback as last resort.
            printf("Trying generic initialization, fallback.\n");
            glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
        } else {
            // We have got a mode, report the properties.
            printf("z-buffer depth: %d (%s)\n", visualDepthBits, visualDepthBits < 24 ? "bad" : "good");
            printf("multisampling : %s\n", visualSupportsMultisample ? "available" : "no");
            printf("alpha bits    : %s\n", visualSupportsAlpha ? "available" : "no");
            if (visualDepthBits < 24) {
                // Show a hint if the z-buffer depth is not optimal.
                printf("The z-buffer resolution is below 24 bit, you will experience rendering\n");
                printf("artefacts. Try to improve the setup of your graphics board or look\n");
                printf("for an alternate driver.\n");
            }
        }
    } else {
        // Compatibility mode.
        glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
        printf("Visual Properties Report\n");
        printf("------------------------\n");
        printf("Compatibility mode, properties unknown.\n");
    }


    if (strcmp(fscr, GFSCR_VAL_YES) == 0) {
        for (i = maxfreq; i > 59; i--) {
            snprintf(buf, BUFSIZE, "%dx%d:%d@%d", winX, winY, depth, i);
            glutGameModeString(buf);
            GfOut("2 - Trying %s mode\n", buf);
            if (glutGameModeGet(GLUT_GAME_MODE_POSSIBLE)) {
                GfOut("2- %s mode Possible\n", buf);
                glutEnterGameMode();
                if (glutGameModeGet(GLUT_GAME_MODE_DISPLAY_CHANGED)) {
                    GfOut("Use GameMode %s\n", buf);
                    usedGM = 1;
                    fullscreen = 1;
                    break;
                } else {
                    glutLeaveGameMode();
                }
            }
        }
    }

    if (!fullscreen) {
    /* Give an initial size and position so user doesn't have to place window */
        glutInitWindowPosition(0, 0);
        glutInitWindowSize(winX, winY);
        Window = glutCreateWindow(argv[0]);
        if (!Window) {
            printf("Error, couldn't open window\n");
            GfScrShutdown();
            exit(1);
        }
    }

    if ((strcmp(fscr, GFSCR_VAL_YES) == 0) && (!fullscreen)) {
        /* glutVideoResize(0, 0, winX, winY); */
        glutFullScreen();
    }

    GfParmReleaseHandle(handle);

    glutReshapeFunc( Reshape );

    checkGLFeatures();
}

void GfScrShutdown(void)
{
    if (usedGM) {
    glutLeaveGameMode();
    }
#if !defined(FREEGLUT) && !defined(WIN32)
    if (usedFG) {
    fglutLeaveGameMode();
    }
#endif

#ifdef USE_RANDR_EXT
    int i;
    for (i = 0; i < nbRes; i++) {
        free(Res[i]);
    }
    free(Res);
#endif // USE_RANDR_EXT
}


void GfScrGetSize(int *scrw, int *scrh, int *vieww, int *viewh)
{
    *scrw = GfScrWidth;
    *scrh = GfScrHeight;
    *vieww = GfViewWidth;
    *viewh = GfViewHeight;
}

static void
saveParams(void)
{
    int x, y, bpp;
    
    sscanf(Res[curRes], "%dx%d", &x, &y);
    sscanf(Depthlist[curDepth], "%d", &bpp);

    const int BUFSIZE = 1024;
    char buf[BUFSIZE];
    snprintf(buf, BUFSIZE, "%s%s", GetLocalDir(), GFSCR_CONF_FILE);
    void *paramHdle = GfParmReadFile(buf, GFPARM_RMODE_STD | GFPARM_RMODE_CREAT);

    GfParmSetNum(paramHdle, GFSCR_SECT_PROP, GFSCR_ATT_X, (char*)NULL, x);
    GfParmSetNum(paramHdle, GFSCR_SECT_PROP, GFSCR_ATT_Y, (char*)NULL, y);
    GfParmSetNum(paramHdle, GFSCR_SECT_PROP, GFSCR_ATT_WIN_X, (char*)NULL, x);
    GfParmSetNum(paramHdle, GFSCR_SECT_PROP, GFSCR_ATT_WIN_Y, (char*)NULL, y);
    GfParmSetNum(paramHdle, GFSCR_SECT_PROP, GFSCR_ATT_BPP, (char*)NULL, bpp);
    GfParmSetNum(paramHdle, GFSCR_SECT_PROP, GFSCR_ATT_MAXREFRESH, (char*)NULL, curMaxFreq);

    GfParmSetStr(paramHdle, GFSCR_SECT_PROP, GFSCR_ATT_VINIT, VInit[curVInit]);

    if (curMode == 0) {
        GfParmSetStr(paramHdle, GFSCR_SECT_PROP, GFSCR_ATT_FSCR, "yes");
    } else {
        GfParmSetStr(paramHdle, GFSCR_SECT_PROP, GFSCR_ATT_FSCR, "no");
    }
    GfParmWriteFile(NULL, paramHdle, "Screen");
    GfParmReleaseHandle(paramHdle);
}


void
GfScrReinit(void * /* dummy */)
{
    int retcode = 0;
    static const int CMDSIZE = 1024;
    char cmd[CMDSIZE];

    stopMenuMusic();
    
#ifndef WIN32
    const char *arg[8];
    int     curArg;
#endif

    saveParams();

#ifdef WIN32
    snprintf(cmd, CMDSIZE, "%swtorcs.exe", GetLibDir());
    int i;
    for (i = 0; i < CMDSIZE && cmd[i] != NULL; i++) {
        if (cmd[i] == '/') {
            cmd[i] = '\\';
        }
    }
    
    char cmdarg[CMDSIZE];
    snprintf(cmdarg, CMDSIZE, "\"%swtorcs.exe\"", GetLibDir());
    for (i = 0; i < CMDSIZE && cmdarg[i] != NULL; i++) {
        if (cmdarg[i] == '/') {
            cmdarg[i] = '\\';
        }
    }

    retcode = execlp(cmd, cmdarg, (const char *)NULL);
#else
    GfScrShutdown();
    
    snprintf (cmd, CMDSIZE, "%storcs-bin", GetLibDir ());
    memset (arg, 0, sizeof (arg));
    curArg = 0;
    if (GfuiMouseHW) {
        arg[curArg++] = "-m";
    }
    
    if (strlen(GetLocalDir ())) {
        arg[curArg++] = "-l";
        arg[curArg++] = GetLocalDir();
    }
    
    if (strlen(GetLibDir ())) {
        arg[curArg++] = "-L";
        arg[curArg++] = GetLibDir ();
    }
    
    if (strlen(GetDataDir ())) {
        arg[curArg++] = "-D";
        arg[curArg++] = GetDataDir ();
    }
    
    switch (curArg) {
        case 0:
            retcode = execlp (cmd, cmd, (const char *)NULL);
            break;
        case 1:
            retcode = execlp (cmd, cmd, arg[0], (const char *)NULL);
            break;
        case 2:
            retcode = execlp (cmd, cmd, arg[0], arg[1], (const char *)NULL);
            break;
        case 3:
            retcode = execlp (cmd, cmd, arg[0], arg[1], arg[2], (const char *)NULL);
            break;
        case 4:
            retcode = execlp (cmd, cmd, arg[0], arg[1], arg[2], arg[3], (const char *)NULL);
            break;
        case 5:
            retcode = execlp (cmd, cmd, arg[0], arg[1], arg[2], arg[3], arg[4], (const char *)NULL);
            break;
        case 6:
            retcode = execlp (cmd, cmd, arg[0], arg[1], arg[2], arg[3], arg[4], arg[5], (const char *)NULL);
            break;
        case 7:
            retcode = execlp (cmd, cmd, arg[0], arg[1], arg[2], arg[3], arg[4], arg[5], arg[6], (const char *)NULL);
            break;
        case 8:
            retcode = execlp (cmd, cmd, arg[0], arg[1], arg[2], arg[3], arg[4], arg[5], arg[6], arg[7], (const char *)NULL);
            break;
    }


#endif
    if (retcode) {
    perror("torcs");
    exit(1);
    }
}

static void
updateLabelText(void)
{
    GfuiLabelSetText (scrHandle, ResLabelId, Res[curRes]);
    GfuiLabelSetText (scrHandle, DepthLabelId, Depthlist[curDepth]);
    GfuiLabelSetText (scrHandle, ModeLabelId, Mode[curMode]);
#ifdef WIN32
    const int BUFSIZE = 1024;
    char buf[BUFSIZE];

    snprintf(buf, BUFSIZE, "%d", curMaxFreq);
    GfuiEditboxSetString(scrHandle, MaxFreqId, buf);
#endif
    GfuiLabelSetText (scrHandle, VInitLabelId, VInit[curVInit]);
}

static void
ResPrevNext(void *vdelta)
{
    long delta = (long)vdelta;
    curRes += (int)delta;
    if (curRes < 0) {
    curRes = nbRes - 1;
    } else {
    if (curRes >= nbRes) {
        curRes = 0;
    }
    }
    updateLabelText();
}

static void
DepthPrevNext(void *vdelta)
{
    long delta = (long)vdelta;

    curDepth += (int)delta;
    if (curDepth < 0) {
    curDepth = nbDepth - 1;
    } else {
    if (curDepth >= nbDepth) {
        curDepth = 0;
    }
    }
    updateLabelText();
}

static void
ModePrevNext(void *vdelta)
{
    long delta = (long)vdelta;

    curMode += (int)delta;
    if (curMode < 0) {
    curMode = nbMode - 1;
    } else {
    if (curMode >= nbMode) {
        curMode = 0;
    }
    }
    updateLabelText();
}


static void
VInitPrevNext(void *vdelta)
{
    long delta = (long)vdelta;

    curVInit += (int)delta;
    if (curVInit < 0) {
        curVInit = nbVInit - 1;
    } else {
        if (curVInit >= nbVInit) {
            curVInit = 0;
        }
    }
    updateLabelText();
}


static void
initFromConf(void)
{
    int x, y, bpp;
    int i;
    const int BUFSIZE = 1024;
    char buf[BUFSIZE];

    snprintf(buf, BUFSIZE, "%s%s", GetLocalDir(), GFSCR_CONF_FILE);
    void *paramHdle = GfParmReadFile(buf, GFPARM_RMODE_STD | GFPARM_RMODE_CREAT);

    x = (int)GfParmGetNum(paramHdle, GFSCR_SECT_PROP, GFSCR_ATT_X, NULL, 640);
    y = (int)GfParmGetNum(paramHdle, GFSCR_SECT_PROP, GFSCR_ATT_Y, NULL, 480);

    snprintf(buf, BUFSIZE, "%dx%d", x, y);
    for (i = 0; i < nbRes; i++) {
        if (!strcmp(buf, Res[i])) {
            curRes = i;
            break;
        }
    }

    if (!strcmp("yes", GfParmGetStr(paramHdle, GFSCR_SECT_PROP, GFSCR_ATT_FSCR, "yes"))) {
        curMode = 0;
    } else {
        curMode = 1;
    }

    curVInit = 0;
    const char *tmp = GfParmGetStr(paramHdle, GFSCR_SECT_PROP, GFSCR_ATT_VINIT, GFSCR_VAL_VINIT_COMPATIBLE);
    for (i = 0; i < nbVInit; i++) {
        if (strcmp(VInit[i], tmp) == 0) {
            curVInit = i;
            break;
        }
    }

    bpp = (int)GfParmGetNum(paramHdle, GFSCR_SECT_PROP, GFSCR_ATT_BPP, NULL, 24);
    snprintf(buf, BUFSIZE, "%d", bpp);
    for (i = 0; i < nbDepth; i++) {
        if (!strcmp(buf, Depthlist[i])) {
            curDepth = i;
            break;
        }
    }

    curMaxFreq = (int)GfParmGetNum(paramHdle, GFSCR_SECT_PROP, GFSCR_ATT_MAXREFRESH, NULL, curMaxFreq);
    GfParmReleaseHandle(paramHdle);
}

#ifdef WIN32
static void
ChangeMaxFreq(void * /* dummy */)
{
    char    *val;
    const int BUFSIZE = 1024;
    char buf[BUFSIZE];
    
    val = GfuiEditboxGetString(scrHandle, MaxFreqId);
    curMaxFreq = (int)strtol(val, (char **)NULL, 0);
    snprintf(buf, BUFSIZE, "%d", curMaxFreq);
    GfuiEditboxSetString(scrHandle, MaxFreqId, buf);
}
#endif

static void
onActivate(void * /* dummy */)
{
    initFromConf();
    updateLabelText();
}


void *
GfScrMenuInit(void *precMenu)
{
    int     y, x1, x2;
    
#ifndef WIN32
    const int yoffset1 = 30, yoffset2 = 60;
#else // WIN32
    const int yoffset1 = 30, yoffset2 = 40;
#endif // WIN32

    if (scrHandle) return scrHandle;

    scrHandle = GfuiScreenCreateEx((float*)NULL, NULL, onActivate, NULL, (tfuiCallback)NULL, 1);
    GfuiTitleCreate(scrHandle, "Screen configuration", 0);
    GfuiScreenAddBgImg(scrHandle, "data/img/splash-graphic.png");

    x1 = 200;
    x2 = 440;
    y = 400;
    GfuiLabelCreate(scrHandle,
            "Screen Resolution",
            GFUI_FONT_LARGE,
            320, y, GFUI_ALIGN_HC_VB,
            0);   

    y -= yoffset1; //30;
    GfuiGrButtonCreate(scrHandle,
               "data/img/arrow-left.png",
               "data/img/arrow-left.png",
               "data/img/arrow-left.png",
               "data/img/arrow-left-pushed.png",
               x1, y, GFUI_ALIGN_HC_VB, 0,
               (void*)-1, ResPrevNext,
               NULL, (tfuiCallback)NULL, (tfuiCallback)NULL);
    GfuiAddSKey(scrHandle, GLUT_KEY_LEFT, "Previous Resolution", (void*)-1, ResPrevNext, NULL);

    ResLabelId = GfuiLabelCreate(scrHandle,
                 "",
                 GFUI_FONT_LARGE_C,
                 320, y, GFUI_ALIGN_HC_VB,
                 30);
    GfuiLabelSetColor(scrHandle, ResLabelId, LabelColor);

    GfuiGrButtonCreate(scrHandle,
               "data/img/arrow-right.png",
               "data/img/arrow-right.png",
               "data/img/arrow-right.png",
               "data/img/arrow-right-pushed.png",
               x2, y, GFUI_ALIGN_HC_VB, 0,
               (void*)1, ResPrevNext,
               NULL, (tfuiCallback)NULL, (tfuiCallback)NULL);
    GfuiAddSKey(scrHandle, GLUT_KEY_RIGHT, "Next Resolution", (void*)1, ResPrevNext, NULL);

    y -= yoffset2; //60;
    GfuiLabelCreate(scrHandle,
            "Color Depth",
            GFUI_FONT_LARGE,
            320, y, GFUI_ALIGN_HC_VB,
            0);
    y -= yoffset1; //30;
    GfuiGrButtonCreate(scrHandle,
               "data/img/arrow-left.png",
               "data/img/arrow-left.png",
               "data/img/arrow-left.png",
               "data/img/arrow-left-pushed.png",
               x1, y, GFUI_ALIGN_HC_VB, 0,
               (void*)-1, DepthPrevNext,
               NULL, (tfuiCallback)NULL, (tfuiCallback)NULL);

    DepthLabelId = GfuiLabelCreate(scrHandle,
                   "",
                   GFUI_FONT_LARGE_C,
                   320, y, GFUI_ALIGN_HC_VB,
                   30);
    GfuiLabelSetColor(scrHandle, DepthLabelId, LabelColor);

    GfuiGrButtonCreate(scrHandle,
               "data/img/arrow-right.png",
               "data/img/arrow-right.png",
               "data/img/arrow-right.png",
               "data/img/arrow-right-pushed.png",
               x2, y, GFUI_ALIGN_HC_VB, 0,
               (void*)1, DepthPrevNext,
               NULL, (tfuiCallback)NULL, (tfuiCallback)NULL);

    y -= yoffset2; //60;
    GfuiLabelCreate(scrHandle,
            "Display Mode",
            GFUI_FONT_LARGE,
            320, y, GFUI_ALIGN_HC_VB,
            0);

    y -= yoffset1; //30;
    GfuiGrButtonCreate(scrHandle,
               "data/img/arrow-left.png",
               "data/img/arrow-left.png",
               "data/img/arrow-left.png",
               "data/img/arrow-left-pushed.png",
               x1, y, GFUI_ALIGN_HC_VB, 0,
               (void*)-1, ModePrevNext,
               NULL, (tfuiCallback)NULL, (tfuiCallback)NULL);

    ModeLabelId = GfuiLabelCreate(scrHandle,
                  "",
                  GFUI_FONT_LARGE_C,
                  320, y, GFUI_ALIGN_HC_VB,
                  30);
    GfuiLabelSetColor(scrHandle, ModeLabelId, LabelColor);

    GfuiGrButtonCreate(scrHandle,
               "data/img/arrow-right.png",
               "data/img/arrow-right.png",
               "data/img/arrow-right.png",
               "data/img/arrow-right-pushed.png",
               x2, y, GFUI_ALIGN_HC_VB, 0,
               (void*)1, ModePrevNext,
               NULL, (tfuiCallback)NULL, (tfuiCallback)NULL);
    GfuiAddKey(scrHandle, 'f', "Display Mode", (void*)1, ModePrevNext, NULL);

#ifdef WIN32
    y -= yoffset2; //60;
    GfuiLabelCreate(scrHandle,
            "Max Frequency",
            GFUI_FONT_LARGE,
            320, y, GFUI_ALIGN_HC_VB,
            0);
    y -= yoffset1; //30;
    MaxFreqId = GfuiEditboxCreate(scrHandle, "", GFUI_FONT_MEDIUM_C,
                   275, y, 0, 8, NULL, (tfuiCallback)NULL, ChangeMaxFreq);
#endif

    y -= yoffset2; //60;
    GfuiLabelCreate(scrHandle,
            "Video Mode Initialization",
            GFUI_FONT_LARGE,
            320, y, GFUI_ALIGN_HC_VB,
            0);
    y -= yoffset1; //30;
    GfuiGrButtonCreate(scrHandle,
               "data/img/arrow-left.png",
               "data/img/arrow-left.png",
               "data/img/arrow-left.png",
               "data/img/arrow-left-pushed.png",
               x1, y, GFUI_ALIGN_HC_VB, 0,
               (void*)-1, VInitPrevNext,
               NULL, (tfuiCallback)NULL, (tfuiCallback)NULL);

    VInitLabelId = GfuiLabelCreate(scrHandle,
                  "",
                  GFUI_FONT_LARGE_C,
                  320, y, GFUI_ALIGN_HC_VB,
                  30);
    GfuiLabelSetColor(scrHandle, VInitLabelId, LabelColor);

    GfuiGrButtonCreate(scrHandle,
               "data/img/arrow-right.png",
               "data/img/arrow-right.png",
               "data/img/arrow-right.png",
               "data/img/arrow-right-pushed.png",
               x2, y, GFUI_ALIGN_HC_VB, 0,
               (void*)1, VInitPrevNext,
               NULL, (tfuiCallback)NULL, (tfuiCallback)NULL);


    GfuiAddKey(scrHandle, 13, "Apply Mode", NULL, GfScrReinit, NULL);
    GfuiButtonCreate(scrHandle, "Apply", GFUI_FONT_LARGE, 210, 40, 150, GFUI_ALIGN_HC_VB, GFUI_MOUSE_UP,
             NULL, GfScrReinit, NULL, (tfuiCallback)NULL, (tfuiCallback)NULL);

    GfuiAddKey(scrHandle, 27, "Cancel", precMenu, GfuiScreenActivate, NULL);
    GfuiButtonCreate(scrHandle, "Back", GFUI_FONT_LARGE, 430, 40, 150, GFUI_ALIGN_HC_VB, GFUI_MOUSE_UP,
             precMenu, GfuiScreenActivate, NULL, (tfuiCallback)NULL, (tfuiCallback)NULL);

    return scrHandle;
}



int GfuiGlutExtensionSupported(const char *str)
{
    return glutExtensionSupported(str);
}