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SGI Developer Toolbox 6.1
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SGI Developer Toolbox 6.1 - Disc 1.iso
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toolbox
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src
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exampleCode
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opengl
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xlib
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fonts.c
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1996-11-11
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330 lines
/*
* (c) Copyright 1994, Silicon Graphics, Inc.
* ALL RIGHTS RESERVED
*
* Permission to use, copy, modify, and distribute this software for
* any purpose and without fee is hereby granted, provided that the above
* copyright notice appear in all copies and that both the copyright notice
* and this permission notice appear in supporting documentation, and that
* the name of Silicon Graphics, Inc. not be used in advertising
* or publicity pertaining to distribution of the software without specific,
* written prior permission.
*
* THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
* AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
* FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
* GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
* SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
* KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
* LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
* THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC. HAS BEEN
* ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
* POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
*
* U.S. GOVERNMENT RESTRICTED RIGHTS LEGEND
* Use, duplication, or disclosure by the Government is subject to
* restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
* (c)(1)(ii) of the Rights in Technical Data and Computer Software
* clause at DFARS 252.227-7013 and/or in similar or successor
* clauses in the FAR or the DOD or NASA FAR Supplement.
* Unpublished-- rights reserved under the copyright laws of the
* United States. Contractor/manufacturer is Silicon Graphics,
* Inc., 2011 N. Shoreline Blvd., Mountain View, CA 94039-7311.
*
* OpenGL(TM) is a trademark of Silicon Graphics, Inc.
*/
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <GL/glx.h>
#include <stdio.h>
#include <stdlib.h>
#include <X11/keysym.h>
#include <string.h>
static int RGBattributes_DB[] = {
GLX_RGBA,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
GLX_DOUBLEBUFFER,
None,
};
static int CIattributes_DB[] = {
GLX_DOUBLEBUFFER,
None,
};
enum {
BLACK = 0,
RED,
GREEN,
YELLOW,
BLUE,
MAGENTA,
CYAN,
WHITE
};
#define COLOR_OFFSET_1 16
#define COLOR_OFFSET_2 32
static float rgbMap[][3] = {
{0, 0, 0},
{1, 0, 0},
{0, 1, 0},
{1, 1, 0},
{0, 0, 1},
{1, 0, 1},
{0, 1, 1},
{1, 1, 1}
};
static long W = 300, H = 300;
static Display *dpy;
static Window window;
static Colormap cmap;
int doubleBuf = 1;
int fontToggle = 0;
GLenum drawBuffer = GL_FRONT;
static long rgb;
static long ci1 = BLUE, ci2 = GREEN;
static LoadGLFont(GLuint *pBase, GLsizei *pCount)
{
XFontStruct *fontInfo;
Font id;
int first, last;
static char pattern1[] = "-adobe-courier-bold-o-normal--18-*-*-*-*-*-*-*";
static char pattern2[] = "-adobe-helvetica-*-o-normal-*-18-*-*-*-*-*-*-*";
static char pattern3[] = "-sgi-screen-bold-*-normal-*-18-*-*-*-*-*-*-*";
static char pattern4[] = "-sgi-rock-*-*-*-*-18-*-*-*-*-*-*-*";
fontToggle = fontToggle%4;
switch (fontToggle) {
case 0: fontInfo = XLoadQueryFont(dpy, pattern1);
break;
case 1: fontInfo = XLoadQueryFont(dpy, pattern2);
break;
case 2: fontInfo = XLoadQueryFont(dpy, pattern3);
break;
case 3: fontInfo = XLoadQueryFont(dpy, pattern4);
break;
}
id = fontInfo->fid;
first = (int)fontInfo->min_char_or_byte2;
last = (int)fontInfo->max_char_or_byte2;
*pCount = last-first+1;
*pBase = glGenLists(last+1);
if (*pBase == 0) {
return 0;
}
glXUseXFont(id, first, *pCount, (int)(*pBase+first));
}
static void Usage(void)
{
printf("Usage: font [-c]\n");
printf(" -c: Run in color index mode\n");
printf(" f key rotates through fonts \n");
exit(-1);
}
static void DoDisplay(void)
{
GLfloat y = 5.0;
GLuint base;
GLsizei count;
LoadGLFont(&base, &count);
glListBase(base);
glLoadIdentity();
glOrtho(0.0, W, 0.0, H, -0.5, 1000.0);
glDrawBuffer(GL_FRONT);
glClearColor(0.0, 0.0, 0.0, 0.0);
glClearIndex(0);
glClear(GL_COLOR_BUFFER_BIT);
glRasterPos2f(10.0, y);
glCallLists(26, GL_UNSIGNED_BYTE,
(unsigned char *)"abcdefghijklmnopqrstuvwxyz");
y += 20.0;
glRasterPos2f(10.0, y);
glCallLists(26, GL_UNSIGNED_BYTE,
(unsigned char *)"abcdefghijklmnopqrstuvwxyz");
y += 20.0;
glRasterPos2f(10.0, y);
glCallLists(26, GL_UNSIGNED_BYTE,
(unsigned char *)"ABCDEFGHIJKLMNOPQRSTUVWXYZ");
y += 20.0;
glRasterPos2f(10.0, y);
glCallLists(26, GL_UNSIGNED_BYTE,
(unsigned char *)"ABCDEFGHIJKLMNOPQRSTUVWXYZ");
y += 20.0;
glRasterPos2f(10.0, y);
glCallLists(10, GL_UNSIGNED_BYTE, "0123456789");
y += 20.0;
glRasterPos2f(10.0, y);
glCallLists(10, GL_UNSIGNED_BYTE, "0123456789");
y += 20.0;
glRasterPos2f(10.0, y);
glCallLists(25, GL_UNSIGNED_BYTE,
(unsigned char *)"N O P Q R S T U V W X Y Z");
y += 20.0;
glRasterPos2f(10.0, y);
glCallLists(25, GL_UNSIGNED_BYTE,
(unsigned char *)"! @ # $ % ^ & * ( ) _ + }");
glXWaitGL();
glFlush();
glDeleteLists(base, count);
}
static Bool WaitForMapNotify(Display *d, XEvent *e, char *arg)
{
if ((e->type == MapNotify) && (e->xmap.window == (Window)arg)) {
return GL_TRUE;
}
return GL_FALSE;
}
int main(long argc, char** argv)
{
XVisualInfo *vi;
XSetWindowAttributes swa;
GLXContext cx;
XEvent event;
GLboolean needDisplay;
int i;
rgb = 1;
doubleBuf = 1;
for (i = 1; i < argc; i++) {
if (argv[i][0] == '-') {
switch (argv[i][1]) {
case 'c':
rgb = 0;
break;
default:
Usage();
}
} else {
Usage();
}
}
dpy = XOpenDisplay(0);
if (!dpy) {
fprintf(stderr, "Can't connect to display \"%s\"\n", getenv("DISPLAY"));
return -1;
}
vi = glXChooseVisual(dpy, DefaultScreen(dpy),
(rgb ? RGBattributes_DB : CIattributes_DB));
if (!vi) {
fprintf(stderr, "No appropriate visual on \"%s\"\n",
getenv("DISPLAY"));
return -1;
}
cmap = XCreateColormap(dpy, RootWindow(dpy, vi->screen), vi->visual,
rgb ? AllocNone : AllocAll);
if (!rgb) {
XColor buf;
int i;
buf.flags = DoRed | DoGreen | DoBlue;
/* Init color map */
for (i=0; i<16; i++) {
buf.pixel = i;
buf.blue = (i & 4) ? 65535 : 0;
buf.green = (i & 2) ? 65535 : 0;
buf.red = (i & 1) ? 65535 : 0;
if (i > 8) {
buf.red /= 2;
buf.green /= 2;
buf.blue /= 2;
}
XStoreColor(dpy, cmap, &buf);
}
}
swa.border_pixel = 0;
swa.colormap = cmap;
swa.event_mask = ExposureMask | StructureNotifyMask | KeyPressMask
| KeyReleaseMask;
window = XCreateWindow(dpy, RootWindow(dpy, vi->screen), 10, 10,
W, H,
0, vi->depth, InputOutput, vi->visual,
CWBorderPixel|CWColormap|CWEventMask, &swa);
XSetWMColormapWindows(dpy, window, &window, 1);
XStoreName(dpy, window, "Fonts Test (optimized)");
XMapWindow(dpy, window);
XIfEvent(dpy, &event, WaitForMapNotify, (char*)window);
cx = glXCreateContext(dpy, vi, 0, GL_TRUE);
if (!glXMakeCurrent(dpy, window, cx)) {
fprintf(stderr, "Can't make window current to context\n");
return -1;
}
needDisplay = GL_TRUE;
for (;;) {
do {
XNextEvent(dpy, &event);
switch (event.type) {
case Expose:
needDisplay = GL_TRUE;
break;
case ConfigureNotify:
W = event.xconfigure.width;
H = event.xconfigure.height;
needDisplay = GL_TRUE;
break;
case KeyPress:
{
char buf[100];
int rv;
KeySym ks;
rv = XLookupString(&event.xkey, buf, sizeof(buf), &ks, 0);
switch (ks) {
case XK_f:
fontToggle ++;
needDisplay = GL_TRUE;
break;
case XK_r:
needDisplay = GL_TRUE;
break;
case XK_Escape:
return 0;
}
}
break;
}
} while (XPending(dpy) != 0);
if (needDisplay) {
needDisplay = GL_FALSE;
DoDisplay();
}
}
}