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font.c
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1998-06-08
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/*
THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
SOFTWARE CORPORATION ("PARALLAX"). PARALLAX, IN DISTRIBUTING THE CODE TO
END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
IN USING, DISPLAYING, AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
FREE PURPOSES. IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES. THE END-USER UNDERSTANDS
AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
COPYRIGHT 1993-1998 PARALLAX SOFTWARE CORPORATION. ALL RIGHTS RESERVED.
*/
/* $Source: f:/miner/source/2d/rcs/font.c $
* $Revision: 1.30 $
* $Author: john $
* $Date: 1995/01/25 20:02:03 $
*
* Graphical routines for drawing fonts.
*
* $Log: font.c $
* Revision 1.30 1995/01/25 20:02:03 john
* Fixed bug with mono clipped fonts only drawing 1 row.
*
* Revision 1.29 1994/12/08 19:03:54 john
* Made functions use cfile.
*
* Revision 1.28 1994/11/27 23:08:22 matt
* Changes for new mprintf calling convention
*
* Revision 1.27 1994/11/18 23:54:50 john
* Made centering work on x = 0x8000 not -0x8000.
*
* Revision 1.26 1994/11/18 22:50:23 john
* Changed shorts to ints in parameters.
*
* Revision 1.25 1994/11/04 11:10:31 john
* Took the & out of string sizing.
*
* Revision 1.24 1994/11/04 10:06:36 john
* Added fade table for fading fonts. Made font that partially clips
* not print a warning message.
*
* Revision 1.23 1994/09/29 10:09:06 john
* Added real clipping to text.
*
* Revision 1.22 1994/09/12 19:27:51 john
* Fixed bug with unclipped fonts clipping.
*
* Revision 1.21 1994/09/12 17:16:59 john
* Added clipping.
*
* Revision 1.20 1994/08/28 16:43:01 matt
* Added centering if x==0x8000
*
* Revision 1.19 1994/08/15 15:01:11 matt
* Close font file after reading
*
* Revision 1.18 1994/08/12 18:17:42 matt
* Fixed stupid bug that cause first char in font not to print
*
* Revision 1.17 1994/08/11 18:00:17 matt
* Cleaned up code, fixed string width bug.
*
* Revision 1.16 1994/08/10 18:46:11 matt
* Fixed a couple of little things
*
* Revision 1.15 1994/08/10 18:36:20 matt
* Changed font file format. Made chars not in font plot as spaces. Font file
* now stores palette for color font & remaps on load.
*
* Revision 1.14 1994/08/10 12:27:27 matt
* Took out unneeded int3
*
* Revision 1.13 1994/08/10 12:25:26 matt
* Added support for colors fonts & kerned fonts
* Made our own font file format
*
* Revision 1.12 1994/07/22 17:19:00 john
* made proportional font width be the max width.
*
* Revision 1.11 1994/05/06 12:50:26 john
* Added supertransparency; neatend things up; took out warnings.
*
* Revision 1.10 1994/01/31 11:08:12 john
* fixed bug with order of frees.
*
* Revision 1.9 1994/01/31 10:36:40 john
* Free'd variable size font data.
*
* Revision 1.8 1994/01/27 17:17:40 john
* Made error if font file doesn't exist.
*
* Revision 1.7 1993/10/26 13:17:48 john
* *** empty log message ***
*
* Revision 1.6 1993/10/15 16:23:25 john
* y
*
* Revision 1.5 1993/09/28 19:05:50 john
* added support for \n in gr_string and gr_get_string_size
*
* Revision 1.4 1993/09/28 12:46:49 matt
* On error, now call Error() instead of exit().
*
* Revision 1.3 1993/09/20 11:35:31 john
* *** empty log message ***
*
* Revision 1.2 1993/09/08 15:54:39 john
* renamed ReadFile to readfontfile to prevent conflicts with others.
*
* Revision 1.1 1993/09/08 11:43:34 john
* Initial revision
*
*
*/
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
#include <fcntl.h>
#include <io.h>
#include <sys\types.h>
#include <sys\stat.h>
#include "mem.h"
#include "gr.h"
#include "grdef.h"
#include "error.h"
#include "cfile.h"
#include "mono.h"
#define FONT grd_curcanv->cv_font
#define FG_COLOR grd_curcanv->cv_font_fg_color
#define BG_COLOR grd_curcanv->cv_font_bg_color
#define FWIDTH FONT->ft_w
#define FHEIGHT FONT->ft_h
#define FBASELINE FONT->ft_baseline
#define FFLAGS FONT->ft_flags
#define FMINCHAR FONT->ft_minchar
#define FMAXCHAR FONT->ft_maxchar
#define FDATA FONT->ft_data
#define FCHARS FONT->ft_chars
#define FWIDTHS FONT->ft_widths
#define BITS_TO_BYTES(x) (((x)+7)>>3)
int gr_internal_string_clipped(int x, int y, char *s );
int gr_internal_string_clipped_m(int x, int y, char *s );
char *find_kern_entry(grs_font *font,char first,char second)
{
ubyte *p=font->ft_kerndata;
while (*p!=255)
if (p[0]==first && p[1]==second)
return p;
else p+=3;
return NULL;
}
//takes the character AFTER being offset into font
#define INFONT(_c) ((_c >= 0) && (_c <= FMAXCHAR-FMINCHAR))
//takes the character BEFORE being offset into current font
get_char_width(int c,int c2,int *width,int *spacing)
{
int letter;
letter = c-FMINCHAR;
if (!INFONT(letter)) { //not in font, draw as space
*width=0;
if (FFLAGS & FT_PROPORTIONAL)
*spacing = FWIDTH/2;
else
*spacing = FWIDTH;
return;
}
if (FFLAGS & FT_PROPORTIONAL)
*width = FWIDTHS[letter];
else
*width = FWIDTH;
*spacing = *width;
if (FFLAGS & FT_KERNED) {
ubyte *p;
if (!(c2==0 || c2=='\n')) {
int letter2;
letter2 = c2-FMINCHAR;
if (INFONT(letter2)) {
p = find_kern_entry(FONT,letter,letter2);
if (p)
*spacing = p[2];
}
}
}
}
int get_centered_x(char *s)
{
int w,w2,s2;
for (w=0;*s!=0 && *s!='\n';s++) {
get_char_width(s[0],s[1],&w2,&s2);
w += s2;
}
return ((grd_curcanv->cv_bitmap.bm_w - w) / 2);
}
int gr_internal_string0(int x, int y, char *s )
{
unsigned char * fp;
char * text_ptr, * next_row, * text_ptr1;
int r, BitMask, i, bits, width, spacing, letter, underline;
unsigned int VideoOffset, VideoOffset1;
VideoOffset1 = y * ROWSIZE + x;
next_row = s;
while (next_row != NULL )
{
text_ptr1 = next_row;
next_row = NULL;
if (x==0x8000) { //centered
int xx = get_centered_x(text_ptr1);
VideoOffset1 = y * ROWSIZE + xx;
}
for (r=0; r<FHEIGHT; r++)
{
text_ptr = text_ptr1;
VideoOffset = VideoOffset1;
while (*text_ptr)
{
if (*text_ptr == '\n' )
{
next_row = &text_ptr[1];
break;
}
underline = 0;
if (*text_ptr == '&' )
{
if ((r==FBASELINE+2) || (r==FBASELINE+3))
underline = 1;
text_ptr++;
}
get_char_width(text_ptr[0],text_ptr[1],&width,&spacing);
letter = *text_ptr-FMINCHAR;
if (!INFONT(letter)) { //not in font, draw as space
VideoOffset += spacing;
text_ptr++;
continue;
}
if (FFLAGS & FT_PROPORTIONAL)
fp = FCHARS[letter];
else
fp = FDATA + letter * BITS_TO_BYTES(width)*FHEIGHT;
if (underline)
for (i=0; i< width; i++ )
DATA[VideoOffset++] = FG_COLOR;
else
{
fp += BITS_TO_BYTES(width)*r;
BitMask = 0;
for (i=0; i< width; i++ )
{
if (BitMask==0) {
bits = *fp++;
BitMask = 0x80;
}
if (bits & BitMask)
DATA[VideoOffset++] = FG_COLOR;
else
DATA[VideoOffset++] = BG_COLOR;
BitMask >>= 1;
}
}
VideoOffset += spacing-width; //for kerning
text_ptr++;
}
VideoOffset1 += ROWSIZE; y++;
}
}
return 0;
}
int gr_internal_string0m(int x, int y, char *s )
{
unsigned char * fp;
char * text_ptr, * next_row, * text_ptr1;
int r, BitMask, i, bits, width, spacing, letter, underline;
unsigned int VideoOffset, VideoOffset1;
VideoOffset1 = y * ROWSIZE + x;
next_row = s;
while (next_row != NULL )
{
text_ptr1 = next_row;
next_row = NULL;
if (x==0x8000) { //centered
int xx = get_centered_x(text_ptr1);
VideoOffset1 = y * ROWSIZE + xx;
}
for (r=0; r<FHEIGHT; r++)
{
text_ptr = text_ptr1;
VideoOffset = VideoOffset1;
while (*text_ptr)
{
if (*text_ptr == '\n' )
{
next_row = &text_ptr[1];
break;
}
underline = 0;
if (*text_ptr == '&' )
{
if ((r==FBASELINE+2) || (r==FBASELINE+3))
underline = 1;
text_ptr++;
}
get_char_width(text_ptr[0],text_ptr[1],&width,&spacing);
letter = *text_ptr-FMINCHAR;
if (!INFONT(letter)) { //not in font, draw as space
VideoOffset += spacing;
text_ptr++;
continue;
}
if (FFLAGS & FT_PROPORTIONAL)
fp = FCHARS[letter];
else
fp = FDATA + letter * BITS_TO_BYTES(width)*FHEIGHT;
if (underline)
for (i=0; i< width; i++ )
DATA[VideoOffset++] = FG_COLOR;
else
{
fp += BITS_TO_BYTES(width)*r;
BitMask = 0;
for (i=0; i< width; i++ )
{
if (BitMask==0) {
bits = *fp++;
BitMask = 0x80;
}
if (bits & BitMask)
DATA[VideoOffset++] = FG_COLOR;
else
VideoOffset++;
BitMask >>= 1;
}
}
text_ptr++;
VideoOffset += spacing-width;
}
VideoOffset1 += ROWSIZE; y++;
}
}
return 0;
}
int gr_internal_string2(int x, int y, char *s )
{
unsigned char * fp;
char * text_ptr, * next_row, * text_ptr1;
int r, BitMask, i, bits, width, spacing, letter, underline;
int page_switched;
unsigned int VideoOffset, VideoOffset1;
VideoOffset1 = (unsigned int)DATA + y * ROWSIZE + x;
gr_vesa_setpage(VideoOffset1 >> 16);
VideoOffset1 &= 0xFFFF;
next_row = s;
while (next_row != NULL )
{
text_ptr1 = next_row;
next_row = NULL;
if (x==0x8000) { //centered
int xx = get_centered_x(text_ptr1);
VideoOffset1 = y * ROWSIZE + xx;
gr_vesa_setpage(VideoOffset1 >> 16);
VideoOffset1 &= 0xFFFF;
}
for (r=0; r<FHEIGHT; r++)
{
text_ptr = text_ptr1;
VideoOffset = VideoOffset1;
page_switched = 0;
while (*text_ptr)
{
if (*text_ptr == '\n' )
{
next_row = &text_ptr[1];
break;
}
underline = 0;
if (*text_ptr == '&' )
{
if ((r==FBASELINE+2) || (r==FBASELINE+3))
underline = 1;
text_ptr++;
}
get_char_width(text_ptr[0],text_ptr[1],&width,&spacing);
Assert(width==spacing); //no kerning support here
letter = *text_ptr-FMINCHAR;
if (!INFONT(letter)) { //not in font, draw as space
VideoOffset += spacing;
text_ptr++;
continue;
}
if (FFLAGS & FT_PROPORTIONAL)
fp = FCHARS[letter];
else
fp = FDATA + letter * BITS_TO_BYTES(width)*FHEIGHT;
if (underline)
{
if ( VideoOffset+width > 0xFFFF )
{
for (i=0; i< width; i++ )
{
gr_video_memory[VideoOffset++] = FG_COLOR;
if (VideoOffset > 0xFFFF )
{
VideoOffset -= 0xFFFF + 1;
page_switched = 1;
gr_vesa_incpage();
}
}
}
else
{
for (i=0; i< width; i++ )
gr_video_memory[VideoOffset++] = FG_COLOR;
}
}
else
{
// fp -- dword
// VideoOffset
// width
fp += BITS_TO_BYTES(width)*r;
BitMask = 0;
if ( VideoOffset+width > 0xFFFF )
{
for (i=0; i< width; i++ )
{
if (BitMask==0) {
bits = *fp++;
BitMask = 0x80;
}
if (bits & BitMask)
gr_video_memory[VideoOffset++] = FG_COLOR;
else
gr_video_memory[VideoOffset++] = BG_COLOR;
BitMask >>= 1;
if (VideoOffset > 0xFFFF )
{
VideoOffset -= 0xFFFF + 1;
page_switched = 1;
gr_vesa_incpage();
}
}
} else {
if (width == 8 )
{
bits = *fp++;
if (bits & 0x80) gr_video_memory[VideoOffset+0] = FG_COLOR;
else gr_video_memory[VideoOffset+0] = BG_COLOR;
if (bits & 0x40) gr_video_memory[VideoOffset+1] = FG_COLOR;
else gr_video_memory[VideoOffset+1] = BG_COLOR;
if (bits & 0x20) gr_video_memory[VideoOffset+2] = FG_COLOR;
else gr_video_memory[VideoOffset+2] = BG_COLOR;
if (bits & 0x10) gr_video_memory[VideoOffset+3] = FG_COLOR;
else gr_video_memory[VideoOffset+3] = BG_COLOR;
if (bits & 0x08) gr_video_memory[VideoOffset+4] = FG_COLOR;
else gr_video_memory[VideoOffset+4] = BG_COLOR;
if (bits & 0x04) gr_video_memory[VideoOffset+5] = FG_COLOR;
else gr_video_memory[VideoOffset+5] = BG_COLOR;
if (bits & 0x02) gr_video_memory[VideoOffset+6] = FG_COLOR;
else gr_video_memory[VideoOffset+6] = BG_COLOR;
if (bits & 0x01) gr_video_memory[VideoOffset+7] = FG_COLOR;
else gr_video_memory[VideoOffset+7] = BG_COLOR;
VideoOffset += 8;
} else {
for (i=0; i< width/2 ; i++ )
{
if (BitMask==0) {
bits = *fp++;
BitMask = 0x80;
}
if (bits & BitMask)
gr_video_memory[VideoOffset++] = FG_COLOR;
else
gr_video_memory[VideoOffset++] = BG_COLOR;
BitMask >>= 1;
// Unroll twice
if (BitMask==0) {
bits = *fp++;
BitMask = 0x80;
}
if (bits & BitMask)
gr_video_memory[VideoOffset++] = FG_COLOR;
else
gr_video_memory[VideoOffset++] = BG_COLOR;
BitMask >>= 1;
}
}
}
}
text_ptr++;
}
VideoOffset1 += ROWSIZE; y++;
if (VideoOffset1 > 0xFFFF ) {
VideoOffset1 -= 0xFFFF + 1;
if (!page_switched)
gr_vesa_incpage();
}
}
}
return 0;
}
int gr_internal_string2m(int x, int y, char *s )
{
unsigned char * fp;
char * text_ptr, * next_row, * text_ptr1;
int r, BitMask, i, bits, width, spacing, letter, underline;
int page_switched;
unsigned int VideoOffset, VideoOffset1;
VideoOffset1 = (unsigned int)DATA + y * ROWSIZE + x;
gr_vesa_setpage(VideoOffset1 >> 16);
VideoOffset1 &= 0xFFFF;
next_row = s;
while (next_row != NULL )
{
text_ptr1 = next_row;
next_row = NULL;
if (x==0x8000) { //centered
int xx = get_centered_x(text_ptr1);
VideoOffset1 = y * ROWSIZE + xx;
gr_vesa_setpage(VideoOffset1 >> 16);
VideoOffset1 &= 0xFFFF;
}
for (r=0; r<FHEIGHT; r++)
{
text_ptr = text_ptr1;
VideoOffset = VideoOffset1;
page_switched = 0;
while (*text_ptr)
{
if (*text_ptr == '\n' )
{
next_row = &text_ptr[1];
break;
}
underline = 0;
if (*text_ptr == '&' )
{
if ((r==FBASELINE+2) || (r==FBASELINE+3))
underline = 1;
text_ptr++;
}
get_char_width(text_ptr[0],text_ptr[1],&width,&spacing);
letter = *text_ptr-FMINCHAR;
if (!INFONT(letter)) { //not in font, draw as space
VideoOffset += width;
text_ptr++;
continue;
}
if (FFLAGS & FT_PROPORTIONAL)
fp = FCHARS[letter];
else
fp = FDATA + letter * BITS_TO_BYTES(width)*FHEIGHT;
if (underline)
{
if ( VideoOffset+width > 0xFFFF )
{
for (i=0; i< width; i++ )
{
gr_video_memory[VideoOffset++] = FG_COLOR;
if (VideoOffset > 0xFFFF )
{
VideoOffset -= 0xFFFF + 1;
page_switched = 1;
gr_vesa_incpage();
}
}
}
else
{
for (i=0; i< width; i++ )
gr_video_memory[VideoOffset++] = FG_COLOR;
}
}
else
{
fp += BITS_TO_BYTES(width)*r;
BitMask = 0;
if ( VideoOffset+width > 0xFFFF )
{
for (i=0; i< width; i++ )
{
if (BitMask==0) {
bits = *fp++;
BitMask = 0x80;
}
if (bits & BitMask)
gr_video_memory[VideoOffset++] = FG_COLOR;
else
VideoOffset++;
BitMask >>= 1;
if (VideoOffset > 0xFFFF )
{
VideoOffset -= 0xFFFF + 1;
page_switched = 1;
gr_vesa_incpage();
}
}
} else {
for (i=0; i< width; i++ )
{
if (BitMask==0) {
bits = *fp++;
BitMask = 0x80;
}
if (bits & BitMask)
gr_video_memory[VideoOffset++] = FG_COLOR;
else
VideoOffset++;;
BitMask >>= 1;
}
}
}
text_ptr++;
VideoOffset += spacing-width;
}
VideoOffset1 += ROWSIZE; y++;
if (VideoOffset1 > 0xFFFF ) {
VideoOffset1 -= 0xFFFF + 1;
if (!page_switched)
gr_vesa_incpage();
}
}
}
return 0;
}
//a bitmap for the character
grs_bitmap char_bm = {
0,0,0,0, //x,y,w,h
BM_LINEAR, //type
BM_FLAG_TRANSPARENT, //flags
0, //rowsize
NULL, //data
0 //selector
};
int gr_internal_color_string(int x, int y, char *s )
{
unsigned char * fp;
char * text_ptr, * next_row, * text_ptr1;
int width, spacing,letter;
int xx,yy;
char_bm.bm_h = FHEIGHT; //set height for chars of this font
next_row = s;
yy = y;
while (next_row != NULL)
{
text_ptr1 = next_row;
next_row = NULL;
text_ptr = text_ptr1;
xx = x;
if (xx==0x8000) //centered
xx = get_centered_x(text_ptr);
while (*text_ptr)
{
if (*text_ptr == '\n' )
{
next_row = &text_ptr[1];
yy += FHEIGHT;
break;
}
letter = *text_ptr-FMINCHAR;
get_char_width(text_ptr[0],text_ptr[1],&width,&spacing);
if (!INFONT(letter)) { //not in font, draw as space
xx += spacing;
text_ptr++;
continue;
}
if (FFLAGS & FT_PROPORTIONAL)
fp = FCHARS[letter];
else
fp = FDATA + letter * BITS_TO_BYTES(width)*FHEIGHT;
char_bm.bm_w = char_bm.bm_rowsize = width;
char_bm.bm_data = fp;
gr_bitmapm(xx,yy,&char_bm);
xx += spacing;
text_ptr++;
}
}
return 0;
}
int gr_string(int x, int y, char *s )
{
int w, h, aw;
int clipped=0;
if ( x == 0x8000 ) {
if ( y<0 ) clipped |= 1;
gr_get_string_size(s, &w, &h, &aw );
// for x, since this will be centered, only look at
// width.
if ( w > grd_curcanv->cv_bitmap.bm_w ) clipped |= 1;
if ( (y+h) > grd_curcanv->cv_bitmap.bm_h ) clipped |= 1;
if ( (y+h) < 0 ) clipped |= 2;
if ( y > grd_curcanv->cv_bitmap.bm_h ) clipped |= 2;
} else {
if ( (x<0) || (y<0) ) clipped |= 1;
gr_get_string_size(s, &w, &h, &aw );
if ( (x+w) > grd_curcanv->cv_bitmap.bm_w ) clipped |= 1;
if ( (y+h) > grd_curcanv->cv_bitmap.bm_h ) clipped |= 1;
if ( (x+w) < 0 ) clipped |= 2;
if ( (y+h) < 0 ) clipped |= 2;
if ( x > grd_curcanv->cv_bitmap.bm_w ) clipped |= 2;
if ( y > grd_curcanv->cv_bitmap.bm_h ) clipped |= 2;
}
if ( !clipped )
return gr_ustring(x, y, s );
if ( clipped & 2 ) {
// Completely clipped...
mprintf( (1, "Text '%s' at (%d,%d) is off screen!\n", s, x, y ));
return 0;
}
if ( clipped & 1 ) {
// Partially clipped...
//mprintf( (0, "Text '%s' at (%d,%d) is getting clipped!\n", s, x, y ));
}
// Partially clipped...
if (FFLAGS & FT_COLOR)
return gr_internal_color_string( x, y, s);
if ( BG_COLOR == -1)
return gr_internal_string_clipped_m( x, y, s );
return gr_internal_string_clipped( x, y, s );
}
int gr_ustring(int x, int y, char *s )
{
if (FFLAGS & FT_COLOR) {
return gr_internal_color_string(x,y,s);
}
else
switch( TYPE )
{
case BM_LINEAR:
if ( BG_COLOR == -1)
return gr_internal_string0m(x,y,s);
else
return gr_internal_string0(x,y,s);
case BM_SVGA:
if ( BG_COLOR == -1)
return gr_internal_string2m(x,y,s);
else
return gr_internal_string2(x,y,s);
}
return 0;
}
void gr_get_string_size(char *s, int *string_width, int *string_height, int *average_width )
{
int i = 0, longest_width = 0;
int width,spacing;
*string_height = FHEIGHT;
*string_width = 0;
*average_width = FWIDTH;
if (s != NULL )
{
*string_width = 0;
while (*s)
{
// if (*s == '&')
// s++;
while (*s == '\n')
{
s++;
*string_height += FHEIGHT;
*string_width = 0;
}
if (*s == 0) break;
get_char_width(s[0],s[1],&width,&spacing);
*string_width += spacing;
if (*string_width > longest_width)
longest_width = *string_width;
i++;
s++;
}
}
*string_width = longest_width;
}
int gr_uprintf( int x, int y, char * format, ... )
{
char buffer[1000];
va_list args;
va_start(args, format );
vsprintf(buffer,format,args);
return gr_ustring( x, y, buffer );
}
int gr_printf( int x, int y, char * format, ... )
{
char buffer[1000];
va_list args;
va_start(args, format );
vsprintf(buffer,format,args);
return gr_string( x, y, buffer );
}
void gr_close_font( grs_font * font )
{
if (font)
{
if ( font->ft_chars )
free( font->ft_chars );
free( font );
}
}
void build_colormap_good( ubyte * palette, ubyte * colormap, int * freq );
void decode_data_asm(ubyte *data, int num_pixels, ubyte * colormap, int * count );
#pragma aux decode_data_asm parm [esi] [ecx] [edi] [ebx] modify exact [esi edi eax ebx ecx] = \
"again_ddn:" \
"xor eax,eax" \
"mov al,[esi]" \
"inc dword ptr [ebx+eax*4]" \
"mov al,[edi+eax]" \
"mov [esi],al" \
"inc esi" \
"dec ecx" \
"jne again_ddn"
grs_font * gr_init_font( char * fontname )
{
grs_font *font;
int i;
unsigned char * ptr;
int nchars;
CFILE *fontfile;
int file_id;
int datasize; //size up to (but not including) palette
fontfile = cfopen(fontname, "rb");
if (!fontfile)
Error( "Can't open font file %s", fontname );
cfread(&file_id,sizeof(file_id),1,fontfile);
cfread(&datasize,sizeof(datasize),1,fontfile);
if (file_id != 'NFSP')
Error( "File %s is not a font file", fontname );
font = (grs_font *) malloc(datasize);
cfread(font,1,datasize,fontfile);
nchars = font->ft_maxchar-font->ft_minchar+1;
if (font->ft_flags & FT_PROPORTIONAL) {
font->ft_widths = (short *) (((int) font->ft_widths) + ((ubyte *) font));
font->ft_data = ((int) font->ft_data) + ((ubyte *) font);
font->ft_chars = (unsigned char **)malloc( nchars * sizeof(unsigned char *));
ptr = font->ft_data;
for (i=0; i< nchars; i++ ) {
font->ft_chars[i] = ptr;
if (font->ft_flags & FT_COLOR)
ptr += font->ft_widths[i] * font->ft_h;
else
ptr += BITS_TO_BYTES(font->ft_widths[i]) * font->ft_h;
}
} else {
font->ft_data = ((unsigned char *) font) + sizeof(*font);
font->ft_chars = NULL;
font->ft_widths = NULL;
ptr = font->ft_data + (nchars * font->ft_w * font->ft_h);
}
if (font->ft_flags & FT_KERNED)
font->ft_kerndata = ((int) font->ft_kerndata) + ((ubyte *) font);
if (font->ft_flags & FT_COLOR) { //remap palette
ubyte palette[256*3];
ubyte colormap[256];
int freq[256];
cfread(palette,3,256,fontfile); //read the palette
build_colormap_good( &palette, colormap, freq );
colormap[255] = 255;
decode_data_asm(font->ft_data, ptr-font->ft_data, colormap, freq );
}
cfclose(fontfile);
//set curcanv vars
FONT = font;
FG_COLOR = 0;
BG_COLOR = 0;
return font;
}
void gr_set_fontcolor( int fg, int bg )
{
FG_COLOR = fg;
BG_COLOR = bg;
}
void gr_set_curfont( grs_font * new )
{
FONT = new;
}
int gr_internal_string_clipped(int x, int y, char *s )
{
unsigned char * fp;
char * text_ptr, * next_row, * text_ptr1;
int r, BitMask, i, bits, width, spacing, letter, underline;
int x1 = x, last_x;
next_row = s;
while (next_row != NULL )
{
text_ptr1 = next_row;
next_row = NULL;
x = x1;
if (x==0x8000) //centered
x = get_centered_x(text_ptr1);
last_x = x;
for (r=0; r<FHEIGHT; r++) {
text_ptr = text_ptr1;
x = last_x;
while (*text_ptr) {
if (*text_ptr == '\n' ) {
next_row = &text_ptr[1];
break;
}
underline = 0;
if (*text_ptr == '&' ) {
if ((r==FBASELINE+2) || (r==FBASELINE+3))
underline = 1;
text_ptr++;
}
get_char_width(text_ptr[0],text_ptr[1],&width,&spacing);
letter = *text_ptr-FMINCHAR;
if (!INFONT(letter)) { //not in font, draw as space
x += spacing;
text_ptr++;
continue;
}
if (FFLAGS & FT_PROPORTIONAL)
fp = FCHARS[letter];
else
fp = FDATA + letter * BITS_TO_BYTES(width)*FHEIGHT;
if (underline) {
for (i=0; i< width; i++ ) {
gr_setcolor(FG_COLOR);
gr_pixel( x++, y );
}
} else {
fp += BITS_TO_BYTES(width)*r;
BitMask = 0;
for (i=0; i< width; i++ ) {
if (BitMask==0) {
bits = *fp++;
BitMask = 0x80;
}
if (bits & BitMask)
gr_setcolor(FG_COLOR);
else
gr_setcolor(BG_COLOR);
gr_pixel( x++, y );
BitMask >>= 1;
}
}
x += spacing-width; //for kerning
text_ptr++;
}
y++;
}
}
return 0;
}
int gr_internal_string_clipped_m(int x, int y, char *s )
{
unsigned char * fp;
char * text_ptr, * next_row, * text_ptr1;
int r, BitMask, i, bits, width, spacing, letter, underline;
int x1 = x, last_x;
next_row = s;
while (next_row != NULL )
{
text_ptr1 = next_row;
next_row = NULL;
x = x1;
if (x==0x8000) //centered
x = get_centered_x(text_ptr1);
last_x = x;
for (r=0; r<FHEIGHT; r++) {
x = last_x;
text_ptr = text_ptr1;
while (*text_ptr) {
if (*text_ptr == '\n' ) {
next_row = &text_ptr[1];
break;
}
underline = 0;
if (*text_ptr == '&' ) {
if ((r==FBASELINE+2) || (r==FBASELINE+3))
underline = 1;
text_ptr++;
}
get_char_width(text_ptr[0],text_ptr[1],&width,&spacing);
letter = *text_ptr-FMINCHAR;
if (!INFONT(letter)) { //not in font, draw as space
x += spacing;
text_ptr++;
continue;
}
if (FFLAGS & FT_PROPORTIONAL)
fp = FCHARS[letter];
else
fp = FDATA + letter * BITS_TO_BYTES(width)*FHEIGHT;
if (underline) {
for (i=0; i< width; i++ ) {
gr_setcolor(FG_COLOR);
gr_pixel( x++, y );
}
} else {
fp += BITS_TO_BYTES(width)*r;
BitMask = 0;
for (i=0; i< width; i++ ) {
if (BitMask==0) {
bits = *fp++;
BitMask = 0x80;
}
if (bits & BitMask) {
gr_setcolor(FG_COLOR);
gr_pixel( x++, y );
} else {
x++;
}
BitMask >>= 1;
}
}
x += spacing-width; //for kerning
text_ptr++;
}
y++;
}
}
return 0;
}