page@swan.ulowell.edu (Bob Page) (12/29/88)
Submitted-by: kim@uts.amdahl.com (Kim E. DeVaughn)
Posting-number: Volume 2, Issue 102
Archive-name: fonts/setfont25.1
[executable in comp.binaries.amiga. ..Bob]
# This is a shell archi
ve.
# Remove everything above and including the cut line.
# Then run the rest of the file through sh.
#----cut here-----cut here-----cut here-----cut here----#
#!/bin/sh
# shar: Shell Archiver
# Run the following text with /bin/sh to create:
# SetFont.cp
# SetFont.doc
# This archive created: Wed Dec 28 13:19:28 1988
cat << \SHAR_EOF > SetFont.cp
// =======================================================================
/* SetFont 2.5 - by Dave Haynie
BIX: hazy
Usenet: {uunet|rutgers}!cbmvax!daveh
PLINK: D-Dave H
Drink: Guinness
BUSINESS:
This program is complete, real, and true public domain software.
Do with it what you will as long as you don't remove my name from it.
Feel free to enhance this as you see fit. I may eventually make one
that's better....
ABOUT IT:
SetFont V2.5 cleans up all known bugs in SetFont V2.0, and it's
the first C++ version. The code is GREATLY cleaned up and simplified
from SetFont V2.0. I no longer free any fonts that were previously
set. V2.0 did too much freeing, but even with that, it is possible
that another program could get a pointer to the font or font descriptor
in a window or screen and choke if that's freed. That may not be good
behavior, but this way's safer. A future version will probably track
fonts opened and closed by SetFont itsself so that it can reclaim some
of it's resources and still be reasonably safe. Right now I have no
way of knowing if the font or descriptor I see is even really owned by
SetFont.
CONFLICTS:
There are a few potential problems the general notion of SetFont in
the Amiga system. First of all, many programs are written to support only
the topaz 8 (80 column) font (sloppy, I know, but that's life). If you're
a 60 column user, you've probably experienced this before. It's not a
problem with the Amiga as a whole, since most of the system will adjust
itself. But it may be a problem with programs that have a fixed idea of
what a font should look like. Most 80 column fonts work with most
applications, and an 80 column 8x8 font will work just about everywhere.
Some programs, like CLI for instance, have trouble with proportionally-
spaced fonts. The best thing to do is try out the font you like. One
final problem is that some applications ask the WorkBench screen to close
when they start up. It'll close if there's nothing else open on it, but
when it re-opens, it'll restart with the Preferences-selected font, not
the SetFont selected font. Of course, preferences doesn't support
arbitrary fonts (which is why this program is even necessary). Oh well,
maybe day.
*/
#include <exec/types.h>
#include <exec/io.h>
#include <exec/ports.h>
#include <exec/memory.h>
#include <graphics/gfxbase.h>
#include <graphics/text.h>
#include <graphics/rastport.h>
#include <libraries/dos.h>
#include <libraries/dosextens.h>
#include <intuition/intuition.h>
#include <string.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
// =========================================================================
// Miscellaneous stuff.
extern TextFont *OpenDiskFont(const TextAttr *);
inline BPTR CADDR(APTR cptr) { return BPTR(ULONG(cptr) >> 2); }
inline void fail(char *a, char *b = NULL) { printf(a,b); exit(10); }
inline MsgPort *contask(MsgPort *port) {
return (MsgPort *) ((port->mp_SigTask->ln_Type == NT_PROCESS)
? ((Process *)port->mp_SigTask)->pr_ConsoleTask
: NULL);
}
// =========================================================================
// This is the "smart" font class. SmartFont items stay around after the
// program exits if they appear to have been used.
class SmartFont {
private:
static BOOL aok; // Font checks out
TextAttr sfattr; // Font descriptor
public:
SmartFont(char *n, UWORD s);
TextFont *font() {
TextFont *f = OpenDiskFont(&sfattr);
if (!f) f = OpenFont(&sfattr);
if (!f) fail("Font \"%s\" not found\n",sfattr.ta_Name);
return f;
}
TextAttr *attr() {
TextAttr *a = (TextAttr *)AllocMem(sizeof(TextAttr),MEMF_PUBLIC|MEMF_CLEAR);
a->ta_Name = (char *)AllocMem(strlen(sfattr.ta_Name)+1,MEMF_PUBLIC|MEMF_CLEAR);
strcpy(a->ta_Name,sfattr.ta_Name);
a->ta_YSize = sfattr.ta_YSize;
return a;
}
char *name() { return sfattr.ta_Name; }
UWORD size() { return sfattr.ta_YSize; }
};
SmartFont::SmartFont(char *n, UWORD s = 8) {
strcat(strcpy(sfattr.ta_Name = new char[strlen(n)+6],n),".font");
sfattr.ta_YSize = (s>2)?s:8;
sfattr.ta_Style = sfattr.ta_Flags = 0;
if (!aok) {
TextFont *f = font();
CloseFont(f);
aok = TRUE;
}
}
// =========================================================================
// These classes manage the places that fonts are hidden.
// This is the basic place node
class PlaceNode : public Node {
private:
static Window *pwin;
static Screen *pscr;
public:
PlaceNode();
PlaceNode *next() { return (PlaceNode *)Node::next(); }
void testwindow() { if (!pwin) fail("Window not found\n"); }
void testscreen() { if (!pscr) fail("Screen not found\n"); }
Window *window() { return pwin; }
Screen *screen() { return pscr; }
virtual void set(SmartFont *f) {
testwindow();
SetFont(window()->graphic(),f->font());
printf("\033c"); // Re-init window's conunit
(void)flushall();
}
};
// Initialize the static stuff, once.
PlaceNode::PlaceNode() {
if (pwin) return;
StandardPacket *packet = new StandardPacket;
InfoData *info = new InfoData;
MsgPort *port = new StdPort;
// Find the window
if (contask(port)) {
packet->sendio(contask(port),port,ACTION_DISK_INFO,CADDR(info));
(void)port->wait();
pwin = (Window *)info->id_VolumeNode;
} else
pwin = NULL;
delete port;
delete info;
delete packet;
// Find the screen
pscr = (pwin) ? pwin->screen() : NULL;
}
// These are the derived special nodes, one for each "place".
#define WindowNode PlaceNode
class ScreenNode : public PlaceNode {
public:
void set(SmartFont *f) {
testscreen();
if (strcmp(screen()->Font->ta_Name,f->name()) == 0)
screen()->Font->ta_YSize = f->size();
else
screen()->Font = f->attr();
}
};
class TitleNode : public PlaceNode {
public:
void set(SmartFont *f) {
testscreen();
SetFont(screen()->graphic(),f->font());
}
};
class BarNode : public PlaceNode {
public:
void set(SmartFont *f) {
testscreen();
SetFont(screen()->BarLayer->rp,f->font());
}
};
// This is the place list, which links a number of place nodes, and also
// manages to go work like finding windows, etc.
class PlaceList : public List {
public:
PlaceList(int argc, char **argv);
PlaceNode *first() { return (PlaceNode *)List::first(); }
};
// The PlaceList constructor does a great deal of the work. It looks up
// the window data, then parses the command line to build the place
// list.
PlaceList::PlaceList(int argc, char **argv) {
// Parse our input arguments
for (short i = 0; i < argc; ++i)
switch (toupper(argv[i][0])) {
case 'B': add(new BarNode); break;
case 'S': add(new ScreenNode); break;
case 'T': add(new TitleNode); break;
case 'W': add(new WindowNode); break;
default : break;
}
if (is_empty()) {
add(new BarNode);
add(new ScreenNode);
add(new TitleNode);
add(new WindowNode);
}
}
// =========================================================================
// Prints help notice
void PrintNotice() {
printf("SetFont 2.5 by Dave Haynie\n\n");
printf("Usage: SetFont [fontname [point [place]]]\n");
printf(" where:\n");
printf(" \2331mfontname\2330m is the font's name (e.g. \"topaz\")\n");
printf(" \2331mpoint\2330m is the point size (default is 8)\n");
printf(" \2331mplace\2330m pick the place, one or more of:\n");
printf(" \2331mBAR\2330m set the barlayer font only\n");
printf(" \2331mSCREEN\2330m set the screen font only\n");
printf(" \2331mTITLES\2330m set the screen titles only\n");
printf(" \2331mWINDOW\2330m set the window's font only\n\n");
printf("If no \2331mplace\2330m switch is given, everything is set.\n\n");
exit(0);
}
// The main function
void main(int argc, char *argv[]) {
// Automatic help command
if (argc < 2 || argv[1][0] == '?') PrintNotice();
// Process the command-line arguments, AmigaDOS style.
PlaceList *plist = new PlaceList(argc-2,&argv[3]);
// Get the font if it's there.
SmartFont *font = new SmartFont(argv[1],atoi(argv[2]));
// Here we apply all the requested changes.
for (PlaceNode *n = plist->first(); n->next(); n = n->next()) n->set(font);
// And we're done!
exit(0);
}
SHAR_EOF
cat << \SHAR_EOF > SetFont.doc
SetFont V2.5 by Dave Haynie
SetFont V2.5 is a public domain program designed to allow the system
font of the Amiga to be changed in various different ways. The program is
called from a shell or startup-sequence script, and has the form:
SetFont [fontname [point [places]]]
where:
fontname Specifys the name of a standard Amiga
bitmapped font from the FONTS: directory.
While any font can in theory be used, the
system has trouble with very large ones,
and some programs may have trouble with any
font that's not 8x8.
point Specifys the height of the font, in pixels.
If that actual size isn't found, the closest
available is substituted. The default for
this is 8.
places There are several places the system keeps
fonts. When you change to a working font
you may want that font everywhere in the
system, in which case, no specifier is set.
Otherwise, the following places are known
by SetFont:
BAR This is the "BarLayer" font for the WorkBench
screen. Among other things, the text in any
string gadgets BEFORE you select them comes
from this location.
SCREEN This specified the default font for the
WorkBench screen. All menus and newly built
windows will inherit this font as their
default font. Technically speaking, this is
a font descriptor stored in the screen
structure.
TITLES This specifies the font that's mainly used
for window title bars. Technically speaking,
this specifies the font of the screen's
RastPort.
WINDOW This specifies the font for the current window.
It will case that window to be cleared. The
reason for this is that the window's font is
not a default, but inherited from the screen
and stored in the window's ConUnit. That
screen clear is the result of rebuilding the
window's ConUnit to bring in the new font.
And that's about it. Please feel free to use this program and the
source code as you see fit. If you find any bugs, please let me know about
them.
-Dave Haynie
PLINK : D-Dave H
bix : hazy
usenet : {rutgers,uunet}!cbmvax!daveh
SHAR_EOF
# End of shell archive
exit 0
--
Bob Page, U of Lowell CS
Dept. page@swan.ulowell.edu ulowell!page
Have five nice days.