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Support for using variable-pitch fonts for the terminal on Windows.

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Done in much the same way as it is in the GTK front end: the character
cell width is determined using the font's digits (which seems to give
generally not-too-offensive spacing in most cases, at the expense of
Ms and Ws typically overhanging a bit into adjacent cells) and each
character is centred in its cell. Overhangs never leave permanent
droppings on the window, because the existing work done in r5003
handles them just fine even in this stressful scenario.

There's a hacky new checkbox in the Appearance panel to make
variable-pitch fonts appear in the font selector (they still don't by
default, because I still think it's _usually_ not What You Want); the
checkbox state is not actually stored as part of a saved session, but
it should be automatically ticked when reloading a session that's got
a variable pitch font selected.

(I'm half-expecting a potential flurry of requests for this feature in
the wake of http://xkcd.com/840/ , so I thought I'd pre-empt them :-)

[originally from svn r9063]
[r5003 == ba470dec5e]
This commit is contained in:
Simon Tatham
2010-12-29 14:11:25 +00:00
parent 7dab9e5573
commit 00b32eda3c
6 changed files with 274 additions and 112 deletions
Download Patch File Download Diff File Expand all files Collapse all files

296
windows/window.c
View File

@ -99,7 +99,7 @@ static int process_clipdata(HGLOBAL clipdata, int unicode);
/* Window layout information */
static void reset_window(int);
static int extra_width, extra_height;
static int font_width, font_height, font_dualwidth;
static int font_width, font_height, font_dualwidth, font_varpitch;
static int offset_width, offset_height;
static int was_zoomed = 0;
static int prev_rows, prev_cols;
@ -1260,7 +1260,6 @@ static void exact_textout(HDC hdc, int x, int y, CONST RECT *lprc,
gcpr.lpGlyphs = (void *)buffer;
gcpr.lpClass = (void *)classbuffer;
gcpr.nGlyphs = cbCount;
GetCharacterPlacementW(hdc, lpString, cbCount, 0, &gcpr,
FLI_MASK | GCP_CLASSIN | GCP_DIACRITIC);
@ -1352,6 +1351,37 @@ debug(("general_textout: done, xn=%d\n", xn));
assert(xn - x >= lprc->right - lprc->left);
}
static int get_font_width(HDC hdc, const TEXTMETRIC *tm)
{
int ret;
/* Note that the TMPF_FIXED_PITCH bit is defined upside down :-( */
if (!(tm->tmPitchAndFamily & TMPF_FIXED_PITCH)) {
ret = tm->tmAveCharWidth;
} else {
#define FIRST '0'
#define LAST '9'
ABCFLOAT widths[LAST-FIRST + 1];
int j;
font_varpitch = TRUE;
font_dualwidth = TRUE;
if (GetCharABCWidthsFloat(hdc, FIRST, LAST, widths)) {
ret = 0;
for (j = 0; j < lenof(widths); j++) {
int width = (int)(0.5 + widths[j].abcfA +
widths[j].abcfB + widths[j].abcfC);
if (ret < width)
ret = width;
}
} else {
ret = tm->tmMaxCharWidth;
}
#undef FIRST
#undef LAST
}
return ret;
}
/*
* Initialise all the fonts we will need initially. There may be as many as
* three or as few as one. The other (potentially) twenty-one fonts are done
@ -1418,11 +1448,18 @@ static void init_fonts(int pick_width, int pick_height)
GetObject(fonts[FONT_NORMAL], sizeof(LOGFONT), &lfont);
/* Note that the TMPF_FIXED_PITCH bit is defined upside down :-( */
if (!(tm.tmPitchAndFamily & TMPF_FIXED_PITCH)) {
font_varpitch = FALSE;
font_dualwidth = (tm.tmAveCharWidth != tm.tmMaxCharWidth);
} else {
font_varpitch = TRUE;
font_dualwidth = TRUE;
}
if (pick_width == 0 || pick_height == 0) {
font_height = tm.tmHeight;
font_width = tm.tmAveCharWidth;
font_width = get_font_width(hdc, &tm);
}
font_dualwidth = (tm.tmAveCharWidth != tm.tmMaxCharWidth);
#ifdef RDB_DEBUG_PATCH
debug(23, "Primary font H=%d, AW=%d, MW=%d",
@ -1509,7 +1546,7 @@ static void init_fonts(int pick_width, int pick_height)
for (i = 0; i < 3; i++) {
if (fonts[i]) {
if (SelectObject(hdc, fonts[i]) && GetTextMetrics(hdc, &tm))
fontsize[i] = tm.tmAveCharWidth + 256 * tm.tmHeight;
fontsize[i] = get_font_width(hdc, &tm) + 256 * tm.tmHeight;
else
fontsize[i] = -i;
} else
@ -1578,7 +1615,7 @@ static void another_font(int fontno)
CreateFont(font_height * (1 + !!(fontno & FONT_HIGH)), x, 0, 0, w,
FALSE, u, FALSE, c, OUT_DEFAULT_PRECIS,
CLIP_DEFAULT_PRECIS, FONT_QUALITY(cfg.font_quality),
FIXED_PITCH | FF_DONTCARE, s);
DEFAULT_PITCH | FF_DONTCARE, s);
fontflag[fontno] = 1;
}
@ -3198,7 +3235,10 @@ void do_text_internal(Context ctx, int x, int y, wchar_t *text, int len,
int force_manual_underline = 0;
int fnt_width, char_width;
int text_adjust = 0;
int xoffset = 0;
int maxlen, remaining, opaque;
static int *IpDx = 0, IpDxLEN = 0;
int *IpDxReal;
lattr &= LATTR_MODE;
@ -3338,111 +3378,155 @@ void do_text_internal(Context ctx, int x, int y, wchar_t *text, int len,
if (line_box.right > font_width*term->cols+offset_width)
line_box.right = font_width*term->cols+offset_width;
/* We're using a private area for direct to font. (512 chars.) */
if (ucsdata.dbcs_screenfont && (text[0] & CSET_MASK) == CSET_ACP) {
/* Ho Hum, dbcs fonts are a PITA! */
/* To display on W9x I have to convert to UCS */
static wchar_t *uni_buf = 0;
static int uni_len = 0;
int nlen, mptr;
if (len > uni_len) {
sfree(uni_buf);
uni_len = len;
uni_buf = snewn(uni_len, wchar_t);
}
for(nlen = mptr = 0; mptr<len; mptr++) {
uni_buf[nlen] = 0xFFFD;
if (IsDBCSLeadByteEx(ucsdata.font_codepage, (BYTE) text[mptr])) {
char dbcstext[2];
dbcstext[0] = text[mptr] & 0xFF;
dbcstext[1] = text[mptr+1] & 0xFF;
IpDx[nlen] += char_width;
MultiByteToWideChar(ucsdata.font_codepage, MB_USEGLYPHCHARS,
dbcstext, 2, uni_buf+nlen, 1);
mptr++;
}
else
{
char dbcstext[1];
dbcstext[0] = text[mptr] & 0xFF;
MultiByteToWideChar(ucsdata.font_codepage, MB_USEGLYPHCHARS,
dbcstext, 1, uni_buf+nlen, 1);
}
nlen++;
}
if (nlen <= 0)
return; /* Eeek! */
ExtTextOutW(hdc, x,
y - font_height * (lattr == LATTR_BOT) + text_adjust,
ETO_CLIPPED | ETO_OPAQUE, &line_box, uni_buf, nlen, IpDx);
if (bold_mode == BOLD_SHADOW && (attr & ATTR_BOLD)) {
SetBkMode(hdc, TRANSPARENT);
ExtTextOutW(hdc, x - 1,
y - font_height * (lattr ==
LATTR_BOT) + text_adjust,
ETO_CLIPPED, &line_box, uni_buf, nlen, IpDx);
}
IpDx[0] = -1;
} else if (DIRECT_FONT(text[0])) {
static char *directbuf = NULL;
static int directlen = 0;
int i;
if (len > directlen) {
directlen = len;
directbuf = sresize(directbuf, directlen, char);
}
for (i = 0; i < len; i++)
directbuf[i] = text[i] & 0xFF;
ExtTextOut(hdc, x,
y - font_height * (lattr == LATTR_BOT) + text_adjust,
ETO_CLIPPED | ETO_OPAQUE, &line_box, directbuf, len, IpDx);
if (bold_mode == BOLD_SHADOW && (attr & ATTR_BOLD)) {
SetBkMode(hdc, TRANSPARENT);
/* GRR: This draws the character outside its box and can leave
* 'droppings' even with the clip box! I suppose I could loop it
* one character at a time ... yuk.
*
* Or ... I could do a test print with "W", and use +1 or -1 for this
* shift depending on if the leftmost column is blank...
*/
ExtTextOut(hdc, x - 1,
y - font_height * (lattr ==
LATTR_BOT) + text_adjust,
ETO_CLIPPED, &line_box, directbuf, len, IpDx);
}
if (font_varpitch) {
/*
* If we're using a variable-pitch font, we unconditionally
* draw the glyphs one at a time and centre them in their
* character cells (which means in particular that we must
* disable the IpDx mechanism). This gives slightly odd but
* generally reasonable results.
*/
xoffset = char_width / 2;
SetTextAlign(hdc, TA_TOP | TA_CENTER | TA_NOUPDATECP);
IpDxReal = NULL;
maxlen = 1;
} else {
/* And 'normal' unicode characters */
static WCHAR *wbuf = NULL;
static int wlen = 0;
int i;
/*
* In a fixed-pitch font, we draw the whole string in one go
* in the normal way.
*/
xoffset = 0;
SetTextAlign(hdc, TA_TOP | TA_LEFT | TA_NOUPDATECP);
IpDxReal = IpDx;
maxlen = len;
}
if (wlen < len) {
sfree(wbuf);
wlen = len;
wbuf = snewn(wlen, WCHAR);
}
opaque = TRUE; /* start by erasing the rectangle */
for (remaining = len; remaining > 0;
text += len, remaining -= len, x += char_width * len) {
len = (maxlen < remaining ? maxlen : remaining);
for (i = 0; i < len; i++)
wbuf[i] = text[i];
/* We're using a private area for direct to font. (512 chars.) */
if (ucsdata.dbcs_screenfont && (text[0] & CSET_MASK) == CSET_ACP) {
/* Ho Hum, dbcs fonts are a PITA! */
/* To display on W9x I have to convert to UCS */
static wchar_t *uni_buf = 0;
static int uni_len = 0;
int nlen, mptr;
if (len > uni_len) {
sfree(uni_buf);
uni_len = len;
uni_buf = snewn(uni_len, wchar_t);
}
/* print Glyphs as they are, without Windows' Shaping*/
general_textout(hdc, x, y - font_height * (lattr == LATTR_BOT) + text_adjust,
&line_box, wbuf, len, IpDx, !(attr & TATTR_COMBINING));
for(nlen = mptr = 0; mptr<len; mptr++) {
uni_buf[nlen] = 0xFFFD;
if (IsDBCSLeadByteEx(ucsdata.font_codepage,
(BYTE) text[mptr])) {
char dbcstext[2];
dbcstext[0] = text[mptr] & 0xFF;
dbcstext[1] = text[mptr+1] & 0xFF;
IpDx[nlen] += char_width;
MultiByteToWideChar(ucsdata.font_codepage, MB_USEGLYPHCHARS,
dbcstext, 2, uni_buf+nlen, 1);
mptr++;
}
else
{
char dbcstext[1];
dbcstext[0] = text[mptr] & 0xFF;
MultiByteToWideChar(ucsdata.font_codepage, MB_USEGLYPHCHARS,
dbcstext, 1, uni_buf+nlen, 1);
}
nlen++;
}
if (nlen <= 0)
return; /* Eeek! */
/* And the shadow bold hack. */
if (bold_mode == BOLD_SHADOW && (attr & ATTR_BOLD)) {
SetBkMode(hdc, TRANSPARENT);
ExtTextOutW(hdc, x - 1,
y - font_height * (lattr ==
LATTR_BOT) + text_adjust,
ETO_CLIPPED, &line_box, wbuf, len, IpDx);
}
ExtTextOutW(hdc, x + xoffset,
y - font_height * (lattr == LATTR_BOT) + text_adjust,
ETO_CLIPPED | (opaque ? ETO_OPAQUE : 0),
&line_box, uni_buf, nlen,
IpDxReal);
if (bold_mode == BOLD_SHADOW && (attr & ATTR_BOLD)) {
SetBkMode(hdc, TRANSPARENT);
ExtTextOutW(hdc, x + xoffset - 1,
y - font_height * (lattr ==
LATTR_BOT) + text_adjust,
ETO_CLIPPED, &line_box, uni_buf, nlen, IpDxReal);
}
IpDx[0] = -1;
} else if (DIRECT_FONT(text[0])) {
static char *directbuf = NULL;
static int directlen = 0;
int i;
if (len > directlen) {
directlen = len;
directbuf = sresize(directbuf, directlen, char);
}
for (i = 0; i < len; i++)
directbuf[i] = text[i] & 0xFF;
ExtTextOut(hdc, x + xoffset,
y - font_height * (lattr == LATTR_BOT) + text_adjust,
ETO_CLIPPED | (opaque ? ETO_OPAQUE : 0),
&line_box, directbuf, len, IpDxReal);
if (bold_mode == BOLD_SHADOW && (attr & ATTR_BOLD)) {
SetBkMode(hdc, TRANSPARENT);
/* GRR: This draws the character outside its box and
* can leave 'droppings' even with the clip box! I
* suppose I could loop it one character at a time ...
* yuk.
*
* Or ... I could do a test print with "W", and use +1
* or -1 for this shift depending on if the leftmost
* column is blank...
*/
ExtTextOut(hdc, x + xoffset - 1,
y - font_height * (lattr ==
LATTR_BOT) + text_adjust,
ETO_CLIPPED, &line_box, directbuf, len, IpDxReal);
}
} else {
/* And 'normal' unicode characters */
static WCHAR *wbuf = NULL;
static int wlen = 0;
int i;
if (wlen < len) {
sfree(wbuf);
wlen = len;
wbuf = snewn(wlen, WCHAR);
}
for (i = 0; i < len; i++)
wbuf[i] = text[i];
/* print Glyphs as they are, without Windows' Shaping*/
general_textout(hdc, x + xoffset,
y - font_height * (lattr==LATTR_BOT) + text_adjust,
&line_box, wbuf, len, IpDxReal,
opaque && !(attr & TATTR_COMBINING));
/* And the shadow bold hack. */
if (bold_mode == BOLD_SHADOW && (attr & ATTR_BOLD)) {
SetBkMode(hdc, TRANSPARENT);
ExtTextOutW(hdc, x + xoffset - 1,
y - font_height * (lattr ==
LATTR_BOT) + text_adjust,
ETO_CLIPPED, &line_box, wbuf, len, IpDxReal);
}
}
/*
* If we're looping round again, stop erasing the background
* rectangle.
*/
SetBkMode(hdc, TRANSPARENT);
opaque = FALSE;
}
if (lattr != LATTR_TOP && (force_manual_underline ||
(und_mode == UND_LINE