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/*
* Ygl: Run GL programs with standard X11 and/or OpenGL routines.
* (C) Fred Hucht 1993-2007
* EMail: fred<at>thp.Uni-Duisburg.de
*/
static const char vcid[] = "$Id: font.c,v 4.3 2007-05-08 11:01:38+02 fred Exp $";
#include "header.h"
#ifdef OGL
static GLuint font_base = 0;
#endif
void loadXfont(Int32 id, Char8 *name) {
int i;
XFontStruct *fs;
const char * MyName = "loadXfont";
I(MyName, "%d,'%s'", id, name);
if(NULL == (fs = XLoadQueryFont(D, name))) {
Yprintf(MyName, "can't find font '%s'.\n", name);
return;
}
if(Ygl.Fonts == NULL) { /* initialize */
i = Ygl.LastFont = 0;
Ygl.Fonts = (YglFont*)malloc(sizeof(YglFont));
} else {
for(i = Ygl.LastFont; i >= 0 && Ygl.Fonts[i].id != id; i--);
if(i < 0) { /* not found */
i = ++Ygl.LastFont;
Ygl.Fonts = (YglFont*)realloc(Ygl.Fonts,
(Ygl.LastFont + 1) * sizeof(YglFont));
}
}
if(Ygl.Fonts == NULL) {
Yprintf(MyName, "can't allocate memory for font '%s'.\n", name);
exit(-1);
}
Ygl.Fonts[i].fs = fs;
Ygl.Fonts[i].id = id;
#ifdef DEBUG
fprintf(stderr,
"loadXfont: name = '%s', fs = 0x%x, id = %d.\n",
name, fs, id);
#endif
}
#ifdef OGL
static void oglSetFont(const char *caller, int i) {
int first;
int last;
if (font_base == 0) {
/* initialize */
font_base = glGenLists(256);
if (!glIsList(font_base)) {
Yprintf(caller, "out of display lists (%d).\n", font_base);
exit (1);
}
}
first = Ygl.Fonts[i].fs->min_char_or_byte2;
last = Ygl.Fonts[i].fs->max_char_or_byte2;
glXUseXFont(Ygl.Fonts[i].fs->fid, first, last-first+1, font_base+first);
}
#endif
void font(Int16 id) {
int i = Ygl.LastFont;
const char * MyName = "font";
I(MyName, "%d", id);
while(i > 0 && Ygl.Fonts[i].id != id) i--;
W->font = i;
#ifdef DEBUG
fprintf(stderr, "font: id = %d, W->font = %d, fid = 0x%x.\n",
id, i, Ygl.Fonts[i].fs->fid);
#endif
IFOGL(oglSetFont(MyName, i),
XSetFont(D, W->chargc, Ygl.Fonts[i].fs->fid));
}
Int32 getfont(void) {
const char * MyName = "getfont";
I(MyName, "");
return Ygl.Fonts[W->font].id;
}
void getfontencoding(char *r) {
XFontStruct *fs;
XFontProp *fp;
int i;
Atom fontatom;
char *name, *np = NULL, *rp = r;
const char * MyName = "getfontencoding";
I(MyName, "'%s'", r);
fs = Ygl.Fonts[W->font].fs;
fontatom = XInternAtom(D, "FONT", False);
for (i = 0, fp = fs->properties; i < fs->n_properties; i++, fp++) {
if (fp->name == fontatom) {
np = name = XGetAtomName(D, fp->card32);
i = 0;
while(i < 13 && *np != 0) if(*np++ == '-') i++;
do {
if(*np != '-') *rp++ = *np;
}
while(*np++ != 0);
XFree(name);
}
}
if(np == NULL) {
Yprintf(MyName, "can't determine fontencoding.\n");
*r = '\0';
}
}
Int32 getheight(void) {
const char * MyName = "getheight";
I(MyName, "");
return(Ygl.Fonts[W->font].fs->ascent +
Ygl.Fonts[W->font].fs->descent);
}
Int32 getdescender(void) {
const char * MyName = "getdescender";
I(MyName, "");
return Ygl.Fonts[W->font].fs->descent;
}
Int32 strwidth(Char8 *string) {
const char * MyName = "strwidth";
I(MyName, "'%s'", string);
return XTextWidth(Ygl.Fonts[W->font].fs, string, strlen(string));
}
void charstr(Char8 *Text) {
const char * MyName = "charstr";
I(MyName, "'%s'", Text);
IFOGL(/* OpenGL */
glRasterPos3f(W->xc, W->yc, W->zc);
glPushAttrib(GL_LIST_BIT);
glListBase(font_base);
glCallLists(strlen(Text), GL_UNSIGNED_BYTE, (GLubyte *)Text);
glPopAttrib(),
/* X11 */
if(!(W->rgb || Ygl.GC)) { /* set text color to active color */
XSetForeground(D, W->chargc, YGL_COLORS(W->color));
}
XDrawString(D, W->draw, W->chargc, X(W->xc), Y(W->yc),
Text, strlen(Text))
);
W->xc += strwidth(Text) / W->xf;
F;
}
void cmov2 (Coord x, Coord y ) { I("cmov2" , "%g,%g", x, y); W->xc = x; W->yc = y; IFOGL(W->zc = 0,/**/); }
void cmov2i(Icoord x, Icoord y ) { I("cmov2i", "%d,%d", x, y); W->xc = x; W->yc = y; IFOGL(W->zc = 0,/**/); }
void cmov2s(Scoord x, Scoord y ) { I("cmov2s", "%d,%d", x, y); W->xc = x; W->yc = y; IFOGL(W->zc = 0,/**/); }
#ifdef OGL
void cmov (Coord x, Coord y, Coord z) { I("cmov" , "%g,%g,%g", x, y, z); W->xc = x; W->yc = y; W->zc = z; }
void cmovi (Icoord x, Icoord y, Icoord z) { I("cmovi", "%d,%d,%d", x, y, z); W->xc = x; W->yc = y; W->zc = z; }
void cmovs (Scoord x, Scoord y, Scoord z) { I("cmovs", "%d,%d,%d", x, y, z); W->xc = x; W->yc = y; W->zc = z; }
#endif
void getcpos(Screencoord *x, Screencoord *y) {
/* Note: Due to a bug in GL getcpos() returns coordinates
* relative to the screen, not to the window. We emulate this. :-((
*/
const char *MyName = "getcpos";
Int32 xo, yo;
I(MyName, "*,*");
getorigin(&xo, &yo);
*x = xo + XR(W->xc);
*y = yo + YR(W->yc);
#ifdef DEBUG
fprintf(stderr, "getcpos: *x = %d, *y = %d\n", *x, *y);
#endif
}
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