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/* Implementation of BDF font handling on the Microsoft W32 API.
Copyright (C) 1999 Free Software Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs 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, or (at your option)
any later version.
GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* Based heavily on code by H. Miyashita for Meadow (a descendant of
MULE for W32). */
#include <windows.h>
#include "config.h"
#include "lisp.h"
#include "charset.h"
#include "frame.h"
#include "dispextern.h"
#include "fontset.h"
#include "blockinput.h"
#include "w32gui.h"
#include "w32term.h"
#include "w32bdf.h"
#define min(a, b) ((a) < (b) ? (a) : (b))
#define max(a, b) ((a) > (b) ? (a) : (b))
/* Portion of GDI Objects which the font cache is allowed to use. This
can be quite high, since the font cache is the only part of Emacs
that uses a large number of GDI objects, but there should still be
some GDI objects reserved for other uses. */
#define CACHE_GDI_ALLOWANCE 9 / 10
void w32_free_bdf_font(bdffont *fontp);
bdffont *w32_init_bdf_font(char *filename);
static int
search_file_line(char *key, char *start, int len, char **val, char **next)
{
int linelen;
unsigned char *p, *q;
p = memchr(start, '\n', len);
if (!p) return -1;
for (;start < p;start++)
{
if ((*start != ' ') || (*start != '\t')) break;
}
linelen = p - start + 1;
*next = p + 1;
if (strncmp(start, key, min(strlen(key), linelen)) == 0)
{
*val = start + strlen(key);
return 1;
}
return 0;
}
static int
proceed_file_line(char *key, char *start, int *len, char **val, char **next)
{
int flag = 0;
do {
flag = search_file_line(key, start, *len, val, next);
*len -= (int)(*next - start);
start = *next;
}while(flag == 0);
if (flag == -1) return 0;
return 1;
}
char*
get_quoted_string(char *start, char *end)
{
char *p, *q, *result;
p = memchr(start, '\"', end - start);
q = 0;
if (!p) return NULL;
p++;
q = memchr(p, '\"', end - q);
if (!q) return NULL;
result = (char*) xmalloc(q - p + 1);
memcpy(result, p, q - p);
result[q - p] = '\0';
return result;
}
static int
set_bdf_font_info(bdffont *fontp)
{
unsigned char *start, *p, *q;
int len, flag;
int bbw, bbh, bbx, bby;
int val1;
len = fontp->size;
start = fontp->font;
fontp->yoffset = 0;
fontp->relative_compose = 0;
fontp->default_ascent = 0;
fontp->registry = NULL;
fontp->encoding = NULL;
fontp->slant = NULL;
/* fontp->width = NULL; */
flag = proceed_file_line("FONTBOUNDINGBOX", start, &len, &p, &q);
if (!flag) return 0;
bbw = strtol(p, &start, 10);
p = start;
bbh = strtol(p, &start, 10);
p = start;
bbx = strtol(p, &start, 10);
p = start;
bby = strtol(p, &start, 10);
fontp->llx = bbx;
fontp->lly = bby;
fontp->urx = bbw + bbx;
fontp->ury = bbh + bby;
fontp->width = bbw;
fontp->height = bbh;
start = q;
flag = proceed_file_line("STARTPROPERTIES", start, &len, &p, &q);
if (!flag) return 1;
flag = 0;
do {
start = q;
if (search_file_line("PIXEL_SIZE", start, len, &p, &q) == 1)
{
val1 = atoi(p);
fontp->pixsz = val1;
}
else if (search_file_line("FONT_ASCENT", start, len, &p, &q) == 1)
{
val1 = atoi(p);
fontp->ury = val1;
}
else if (search_file_line("FONT_DESCENT", start, len, &p, &q) == 1)
{
val1 = atoi(p);
fontp->lly = -val1;
}
else if (search_file_line("_MULE_BASELINE_OFFSET", start, len, &p, &q) == 1)
{
val1 = atoi(p);
fontp->yoffset = val1;
}
else if (search_file_line("_MULE_RELATIVE_COMPOSE", start, len, &p, &q) == 1)
{
val1 = atoi(p);
fontp->relative_compose = val1;
}
else if (search_file_line("_MULE_DEFAULT_ASCENT", start, len, &p, &q) == 1)
{
val1 = atoi(p);
fontp->default_ascent = val1;
}
else if (search_file_line("CHARSET_REGISTRY", start, len, &p, &q) == 1)
{
fontp->registry = get_quoted_string(p, q);
}
else if (search_file_line("CHARSET_ENCODING", start, len, &p, &q) == 1)
{
fontp->encoding = get_quoted_string(p, q);
}
else if (search_file_line("SLANT", start, len, &p, &q) == 1)
{
fontp->slant = get_quoted_string(p, q);
}
/*
else if (search_file_line("SETWIDTH_NAME", start, len, &p, &q) == 1)
{
fontp->width = get_quoted_string(p, q);
}
*/
else
{
flag = search_file_line("ENDPROPERTIES", start, len, &p, &q);
}
if (flag == -1) return 0;
len -= (q - start);
}while(flag == 0);
start = q;
flag = proceed_file_line("CHARS", start, &len, &p, &q);
if (!flag) return 0;
fontp->seeked = q;
return 1;
}
bdffont*
w32_init_bdf_font(char *filename)
{
HANDLE hfile, hfilemap;
bdffont *bdffontp;
unsigned char *font;
BY_HANDLE_FILE_INFORMATION fileinfo;
int i;
hfile = CreateFile(filename, GENERIC_READ, FILE_SHARE_READ, NULL,
OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (hfile == INVALID_HANDLE_VALUE) return NULL;
if (!GetFileInformationByHandle(hfile, &fileinfo) ||
(fileinfo.nFileSizeHigh != 0) ||
(fileinfo.nFileSizeLow > BDF_FILE_SIZE_MAX))
{
CloseHandle(hfile);
error("Fail to open BDF file.");
}
hfilemap = CreateFileMapping(hfile, NULL, PAGE_READONLY, 0, 0, NULL);
if (hfilemap == INVALID_HANDLE_VALUE)
{
CloseHandle(hfile);
error("Can't map font.");
}
font = MapViewOfFile(hfilemap, FILE_MAP_READ, 0, 0, 0);
if (!font)
{
CloseHandle(hfile);
CloseHandle(hfilemap);
error("Can't view font.");
}
bdffontp = (bdffont *) xmalloc(sizeof(bdffont));
for(i = 0;i < BDF_FIRST_OFFSET_TABLE;i++)
bdffontp->chtbl[i] = NULL;
bdffontp->size = fileinfo.nFileSizeLow;
bdffontp->font = font;
bdffontp->hfile = hfile;
bdffontp->hfilemap = hfilemap;
bdffontp->filename = (char*) xmalloc(strlen(filename) + 1);
strcpy(bdffontp->filename, filename);
if (!set_bdf_font_info(bdffontp))
{
w32_free_bdf_font(bdffontp);
error("Invalid BDF font!");
}
return bdffontp;
}
void
w32_free_bdf_font(bdffont *fontp)
{
int i, j;
font_char *pch;
cache_bitmap *pcb;
UnmapViewOfFile(fontp->hfilemap);
CloseHandle(fontp->hfilemap);
CloseHandle(fontp->hfile);
if (fontp->registry) xfree(fontp->registry);
if (fontp->encoding) xfree(fontp->encoding);
if (fontp->slant) xfree(fontp->slant);
/* if (fontp->width) xfree(fontp->width); */
xfree(fontp->filename);
for(i = 0;i < BDF_FIRST_OFFSET_TABLE;i++)
{
pch = fontp->chtbl[i];
if (pch)
{
for (j = 0;j < BDF_SECOND_OFFSET_TABLE;j++)
{
pcb = pch[j].pcbmp;
if (pcb) pcb->psrc = NULL;
}
xfree(pch);
}
}
xfree(fontp);
}
static font_char*
get_cached_font_char(bdffont *fontp, int index)
{
font_char *pch, *result;
int i;
if (index > 0xffff)
return NULL;
pch = fontp->chtbl[BDF_FIRST_OFFSET(index)];
if (!pch)
return NULL;
result = &pch[BDF_SECOND_OFFSET(index)];
if (!result->offset) return NULL;
return result;
}
static font_char*
cache_char_offset(bdffont *fontp, int index, unsigned char *offset)
{
font_char *pch, *result;
int i;
if (index > 0xffff)
return NULL;
pch = fontp->chtbl[BDF_FIRST_OFFSET(index)];
if (!pch)
{
pch = fontp->chtbl[BDF_FIRST_OFFSET(index)] =
(font_char*) xmalloc(sizeof(font_char) *
BDF_SECOND_OFFSET_TABLE);
memset(pch, 0, sizeof(font_char) * BDF_SECOND_OFFSET_TABLE);
}
result = &pch[BDF_SECOND_OFFSET(index)];
result->offset = offset;
return result;
}
static font_char*
seek_char(bdffont *fontp, int index)
{
font_char *result;
int len, flag, font_index;
unsigned char *start, *p, *q;
if (!fontp->seeked) return NULL;
start = fontp->seeked;
len = fontp->size - (start - fontp->font);
do {
flag = proceed_file_line("ENCODING", start, &len, &p, &q);
if (!flag)
{
fontp->seeked = NULL;
return NULL;
}
font_index = atoi(p);
result = cache_char_offset(fontp, font_index, q);
if (!result) return NULL;
start = result->offset;
} while (font_index != index);
fontp->seeked = start;
return result;
}
#define GET_HEX_VAL(x) ((isdigit(x)) ? ((x) - '0') : \
(((x) >= 'A') && ((x) <= 'Z')) ? ((x) - 'A' + 10) : \
(((x) >= 'a') && ((x) <= 'z')) ? ((x) - 'a' + 10) : \
(-1))
int
w32_get_bdf_glyph(bdffont *fontp, int index, int size, glyph_struct *glyph)
{
font_char *pch;
unsigned char *start, *p, *q, *bitmapp;
unsigned char val1, val2;
int i, j, len, flag;
pch = get_cached_font_char(fontp, index);
if (!pch)
{
pch = seek_char(fontp, index);
if (!pch)
return 0;
}
start = pch->offset;
if ((size == 0) && pch->pcbmp)
{
glyph->metric = pch->pcbmp->metric;
return 1;
}
len = fontp->size - (start - fontp->font);
flag = proceed_file_line("DWIDTH", start, &len, &p, &q);
if (!flag)
return 0;
glyph->metric.dwidth = atoi(p);
start = q;
flag = proceed_file_line("BBX", start, &len, &p, &q);
if (!flag)
return 0;
glyph->metric.bbw = strtol(p, &start, 10);
p = start;
glyph->metric.bbh = strtol(p, &start, 10);
p = start;
glyph->metric.bbox = strtol(p, &start, 10);
p = start;
glyph->metric.bboy = strtol(p, &start, 10);
if (size == 0) return 1;
start = q;
flag = proceed_file_line("BITMAP", start, &len, &p, &q);
if (!flag)
return 0;
p = q;
bitmapp = glyph->bitmap;
for(i = 0;i < glyph->metric.bbh;i++)
{
q = memchr(p, '\n', len);
if (!q) return 0;
for(j = 0;((q > p) && (j < ((glyph->metric.bbw + 7) / 8 )));j++)
{
val1 = GET_HEX_VAL(*p);
if (val1 == -1) return 0;
p++;
val2 = GET_HEX_VAL(*p);
if (val2 == -1) return 0;
p++;
size--;
if (size <= 0) return 0;
/* NAND Operation. */
*bitmapp++ = (unsigned char)~((val1 << 4) | val2);
}
/* CreateBitmap requires WORD alignment. */
if (j % 2)
{
*bitmapp++ = 0xff;
}
p = q + 1;
}
return 1;
}
#define NEXT_CACHE_SLOT(n) (((n) + 1 >= BDF_FONT_CACHE_SIZE) ? 0 : ((n) + 1))
static
cache_bitmap*
get_bitmap_with_cache(bdffont *fontp, int index)
{
int bitmap_size;
font_char *pch;
cache_bitmap* pcb;
HBITMAP hbmp;
glyph_struct glyph;
static cache_bitmap cached_bitmap_slots[BDF_FONT_CACHE_SIZE];
static int cache_in_slot = 0; /* the next slot to use */
static int cache_out_slot = 0; /* the last slot allocated */
static int cache_occupancy = 0; /* current cache occupancy */
static int cache_limit = BDF_FONT_CACHE_SIZE; /* allowed maximum occupancy */
pch = get_cached_font_char(fontp, index);
if (pch)
{
pcb = pch->pcbmp;
if (pcb) return pcb;
}
bitmap_size = ((fontp->urx - fontp->llx) / 8 + 2) * (fontp->ury - fontp->lly)
+ 256;
glyph.bitmap = (unsigned char*) alloca(sizeof(unsigned char) * bitmap_size);
if (!w32_get_bdf_glyph(fontp, index, bitmap_size, &glyph))
return NULL;
pch = get_cached_font_char(fontp, index);
if (!pch) return NULL;
hbmp = CreateBitmap(glyph.metric.bbw, glyph.metric.bbh, 1, 1, glyph.bitmap);
/* if bitmap allocation fails reduce the limit of the occupancy so
that we can hope it will not happen again. */
if (hbmp == NULL)
cache_limit = cache_occupancy * CACHE_GDI_ALLOWANCE;
/* if cache occupancy reaches at the limit release some cache slots */
if (cache_occupancy >= cache_limit)
{
register int size_to_clear = cache_limit * BDF_FONT_CLEAR_SIZE
/ BDF_FONT_CACHE_SIZE;
for (; size_to_clear; size_to_clear--,
cache_out_slot = NEXT_CACHE_SLOT(cache_out_slot))
{
register cache_bitmap *p = &cached_bitmap_slots[cache_out_slot];
if (p->psrc)
{
DeleteObject(p->hbmp);
p->psrc->pcbmp = NULL;
p->psrc = NULL;
cache_occupancy--;
}
}
}
if (hbmp == NULL)
hbmp = CreateBitmap (glyph.metric.bbw, glyph.metric.bbh,
1, 1, glyph.bitmap);
pcb = &cached_bitmap_slots[cache_in_slot];
pcb->psrc = pch;
pcb->metric = glyph.metric;
pcb->hbmp = hbmp;
pch->pcbmp = pcb;
cache_in_slot = NEXT_CACHE_SLOT(cache_in_slot);
cache_occupancy++;
return pcb;
}
int
w32_BDF_TextOut(bdffont *fontp, HDC hdc, int left,
int top, unsigned char *text, int dim, int bytelen,
int fixed_pitch_size)
{
int index, btop;
unsigned char *textp;
HDC hCompatDC = 0;
cache_bitmap *pcb;
HBITMAP hBMP;
HBRUSH hFgBrush, hOrgBrush;
HANDLE horgobj = 0;
UINT textalign;
int flag = 0;
hCompatDC = CreateCompatibleDC(hdc);
textalign = GetTextAlign(hdc);
SaveDC(hdc);
hFgBrush = CreateSolidBrush(GetTextColor(hdc));
hOrgBrush = SelectObject(hdc, hFgBrush);
SetTextColor(hdc, RGB(0, 0, 0));
SetBkColor(hdc, RGB(0xff, 0xff, 0xff));
textp = text;
while(bytelen > 0)
{
if (dim == 1)
{
index = *textp++;
bytelen--;
}
else
{
bytelen -= 2;
if (bytelen < 0) break;
index = MAKELENDSHORT(textp[1], textp[0]);
textp += 2;
}
pcb = get_bitmap_with_cache(fontp, index);
if (!pcb)
{
if (horgobj)
{
SelectObject(hCompatDC, horgobj);
DeleteObject(hBMP);
}
DeleteDC(hCompatDC);
return 0;
}
hBMP = pcb->hbmp;
if (textalign & TA_BASELINE)
btop = top - (pcb->metric.bbh + pcb->metric.bboy);
else if (textalign & TA_BOTTOM)
btop = top - pcb->metric.bbh;
else
btop = top;
if (horgobj)
SelectObject(hCompatDC, hBMP);
else
horgobj = SelectObject(hCompatDC, hBMP);
#if 0
BitBlt(hdc, left, btop, pcb->metric.bbw, pcb->metric.bbh, hCompatDC, 0, 0, SRCCOPY);
#else
BitBlt(hdc, left, btop, pcb->metric.bbw, pcb->metric.bbh, hCompatDC, 0, 0, 0xB8074A);
#endif
if (fixed_pitch_size)
left += fixed_pitch_size;
else
left += pcb->metric.dwidth;
}
SelectObject(hCompatDC, horgobj);
SelectObject(hdc, hOrgBrush);
DeleteObject(hFgBrush);
DeleteDC(hCompatDC);
RestoreDC(hdc, -1);
return 1;
}
struct font_info *w32_load_bdf_font (struct frame *f, char *fontname,
int size, char* filename)
{
struct w32_display_info *dpyinfo = FRAME_W32_DISPLAY_INFO (f);
struct font_info *fontp;
XFontStruct *font;
bdffont* bdf_font;
bdf_font = w32_init_bdf_font (filename);
if (!bdf_font) return NULL;
font = (XFontStruct *) xmalloc (sizeof (XFontStruct));
font->bdf = bdf_font;
font->hfont = 0;
/* NTEMACS_TODO: Recognize DBCS fonts. */
font->double_byte_p = 0;
/* Do we need to create the table? */
if (dpyinfo->font_table_size == 0)
{
dpyinfo->font_table_size = 16;
dpyinfo->font_table
= (struct font_info *) xmalloc (dpyinfo->font_table_size
* sizeof (struct font_info));
}
/* Do we need to grow the table? */
else if (dpyinfo->n_fonts
>= dpyinfo->font_table_size)
{
dpyinfo->font_table_size *= 2;
dpyinfo->font_table
= (struct font_info *) xrealloc (dpyinfo->font_table,
(dpyinfo->font_table_size
* sizeof (struct font_info)));
}
fontp = dpyinfo->font_table + dpyinfo->n_fonts;
/* Now fill in the slots of *FONTP. */
BLOCK_INPUT;
fontp->font = font;
fontp->font_idx = dpyinfo->n_fonts;
fontp->name = (char *) xmalloc (strlen (fontname) + 1);
bcopy (fontname, fontp->name, strlen (fontname) + 1);
fontp->full_name = fontp->name;
fontp->size = FONT_WIDTH (font);
fontp->height = FONT_HEIGHT (font);
/* The slot `encoding' specifies how to map a character
code-points (0x20..0x7F or 0x2020..0x7F7F) of each charset to
the font code-points (0:0x20..0x7F, 1:0xA0..0xFF, 0:0x2020..0x7F7F,
the font code-points (0:0x20..0x7F, 1:0xA0..0xFF,
0:0x2020..0x7F7F, 1:0xA0A0..0xFFFF, 3:0x20A0..0x7FFF, or
2:0xA020..0xFF7F). For the moment, we don't know which charset
uses this font. So, we set informatoin in fontp->encoding[1]
which is never used by any charset. If mapping can't be
decided, set FONT_ENCODING_NOT_DECIDED. */
fontp->encoding[1] = FONT_ENCODING_NOT_DECIDED;
fontp->baseline_offset = bdf_font->yoffset;
fontp->relative_compose = bdf_font->relative_compose;
fontp->default_ascent = bdf_font->default_ascent;
UNBLOCK_INPUT;
dpyinfo->n_fonts++;
return fontp;
}
/* Check a file for an XFLD string describing it. */
int w32_BDF_to_x_font (char *file, char* xstr, int len)
{
HANDLE hfile, hfilemap;
BY_HANDLE_FILE_INFORMATION fileinfo;
unsigned char *font, *start, *p, *q;
int flag, size, retval = 0;
hfile = CreateFile (file, GENERIC_READ, FILE_SHARE_READ, NULL,
OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (hfile == INVALID_HANDLE_VALUE) return 0;
if (!GetFileInformationByHandle(hfile, &fileinfo) ||
(fileinfo.nFileSizeHigh != 0) ||
(fileinfo.nFileSizeLow > BDF_FILE_SIZE_MAX))
{
CloseHandle (hfile);
return 0;
}
size = fileinfo.nFileSizeLow;
hfilemap = CreateFileMapping (hfile, NULL, PAGE_READONLY, 0, 0, NULL);
if (hfilemap == INVALID_HANDLE_VALUE)
{
CloseHandle (hfile);
return 0;
}
font = MapViewOfFile (hfilemap, FILE_MAP_READ, 0, 0, 0);
if (!font)
{
CloseHandle (hfile);
CloseHandle (hfilemap);
return 0;
}
start = font;
flag = proceed_file_line ("FONT ", start, &size, &p, &q);
if (flag)
{
/* If font provides a description of itself, check it is a
full XLFD before accepting it. */
int count = 0;
char *s;
for (s = p; s < q; s++)
if (*s == '\n')
break;
else if (*s == '-')
count++;
if (count == 14 && q - p - 1 <= len)
{
strncpy (xstr, p, q-p-1);
xstr[q-p-1] = '\0';
/* Files may have DOS line ends (ie still ^M on end). */
if (iscntrl(xstr[q-p-2]))
xstr[q-p-2] = '\0';
retval = 1;
}
}
CloseHandle (hfile);
CloseHandle (hfilemap);
return retval;
}
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