TGlyphInfo *glyph_cache_get_info(TGlyphCache *cache, gunichar glyph) {
TGlyphInfo *gfi;
XftFont *xftfont;
PangoFont *font;
PangoGlyph pglyph;
PangoRectangle ink, logical;
gint ascent, descent;
gint x_offset;
gint nominal_width;
double scale_y, scale_x;
if (!cache->hash)
return NULL;
gfi = g_hash_table_lookup(cache->hash, GINT_TO_POINTER(glyph));
if (gfi)
return gfi;
font = pango_fontset_get_font(cache->font_set, glyph);
pglyph = pango_fc_font_get_glyph(PANGO_FC_FONT(font), glyph);
if (!pglyph) {
fprintf (stderr, "Error: Unable to find glyph %d.\n", glyph);
if (!pglyph)
pglyph = pango_fc_font_get_glyph(PANGO_FC_FONT(font), glyph);
if (!pglyph)
pglyph = PANGO_GET_UNKNOWN_GLYPH (glyph);
if (!pglyph)
return NULL;
}
pango_font_get_glyph_extents(font, pglyph, &ink, &logical);
ascent = PANGO_ASCENT(logical);
descent = PANGO_DESCENT(logical);
xftfont = pango_xft_font_get_font(font);
x_offset = 0;
nominal_width = cache->width;
if (g_unichar_iswide(glyph))
nominal_width *= 2;
scale_x = scale_y = 1.0;
if (logical.width > nominal_width) {
if (logical.width)
scale_x = (double)nominal_width / (double)logical.width;
else
scale_x = 1.0;
}
if (logical.height != cache->height) {
double scale;
if (ascent) {
scale_y = (double)cache->ascent / (double)ascent;
} else {
scale_y = 1.0;
}
if (descent) {
scale = (double)cache->descent / (double)descent;
if (scale < scale_y)
scale_y = scale;
}
}
if (scale_x >= 1.0) {
scale_x = 1.0;
x_offset += (nominal_width - logical.width) / 2;
}
if (scale_x < 1.0 || scale_y != 1.0) {
FcBool scalable;
FcPatternGetBool(xftfont->pattern, FC_SCALABLE, 0, &scalable);
if (!scalable) {
/* Bah. Need better handling of non-scalable fonts */
if (scale_x < 1.0) scale_x = 1.0;
scale_y = 1.0;
} else if (scale_x < 1.0 || scale_y != 1.0) {
FcPattern *pattern;
FcMatrix mat;
pattern = FcPatternDuplicate(xftfont->pattern);
FcMatrixInit (&mat);
FcMatrixScale(&mat, scale_x, scale_y);
FcPatternDel (pattern, FC_MATRIX);
FcPatternAddMatrix(pattern, FC_MATRIX, &mat);
xftfont = XftFontOpenPattern(
GDK_DISPLAY_XDISPLAY(cache->display),
pattern
);
}
ascent = ascent * scale_y;
}
g_object_unref(font);
// gfi = calloc(sizeof(TGlyphInfo), 1);
gfi = g_slice_new(TGlyphInfo);
gfi->font = xftfont;
gfi->x_offset = PANGO_PIXELS(x_offset);
gfi->y_offset = cache->ascent + (cache->ascent - ascent);
gfi->y_offset = PANGO_PIXELS(gfi->y_offset);
g_hash_table_insert(cache->hash, GINT_TO_POINTER(glyph), gfi);
return gfi;
}
static XftFont *
GetFont(
UnixFtFont *fontPtr,
FcChar32 ucs4,
double angle)
{
int i;
if (ucs4) {
for (i = 0; i < fontPtr->nfaces; i++) {
FcCharSet *charset = fontPtr->faces[i].charset;
if (charset && FcCharSetHasChar(charset, ucs4)) {
break;
}
}
if (i == fontPtr->nfaces) {
i = 0;
}
} else {
i = 0;
}
if ((angle == 0.0 && !fontPtr->faces[i].ft0Font) || (angle != 0.0 &&
(!fontPtr->faces[i].ftFont || fontPtr->faces[i].angle != angle))){
FcPattern *pat = FcFontRenderPrepare(0, fontPtr->pattern,
fontPtr->faces[i].source);
double s = sin(angle*PI/180.0), c = cos(angle*PI/180.0);
FcMatrix mat;
XftFont *ftFont;
/*
* Initialize the matrix manually so this can compile with HP-UX cc
* (which does not allow non-constant structure initializers). [Bug
* 2978410]
*/
mat.xx = mat.yy = c;
mat.xy = -(mat.yx = s);
if (angle != 0.0) {
FcPatternAddMatrix(pat, FC_MATRIX, &mat);
}
ftFont = XftFontOpenPattern(fontPtr->display, pat);
if (!ftFont) {
/*
* The previous call to XftFontOpenPattern() should not fail, but
* sometimes does anyway. Usual cause appears to be a
* misconfigured fontconfig installation; see [Bug 1090382]. Try a
* fallback:
*/
ftFont = XftFontOpen(fontPtr->display, fontPtr->screen,
FC_FAMILY, FcTypeString, "sans",
FC_SIZE, FcTypeDouble, 12.0,
FC_MATRIX, FcTypeMatrix, &mat,
NULL);
}
if (!ftFont) {
/*
* The previous call should definitely not fail. Impossible to
* proceed at this point.
*/
Tcl_Panic("Cannot find a usable font");
}
if (angle == 0.0) {
fontPtr->faces[i].ft0Font = ftFont;
} else {
if (fontPtr->faces[i].ftFont) {
XftFontClose(fontPtr->display, fontPtr->faces[i].ftFont);
}
fontPtr->faces[i].ftFont = ftFont;
fontPtr->faces[i].angle = angle;
}
}
return (angle==0.0? fontPtr->faces[i].ft0Font : fontPtr->faces[i].ftFont);
}
