void SimpleFontData::platformInit()
{
if (!m_platformData.scaledFont())
return;
cairo_font_extents_t font_extents;
cairo_text_extents_t text_extents;
cairo_scaled_font_extents(m_platformData.scaledFont(), &font_extents);
m_fontMetrics.setAscent(font_extents.ascent);
m_fontMetrics.setDescent(font_extents.descent);
// There seems to be some rounding error in cairo (or in how we
// use cairo) with some fonts, like DejaVu Sans Mono, which makes
// cairo report a height smaller than ascent + descent, which is
// wrong and confuses WebCore's layout system. Workaround this
// while we figure out what's going on.
float lineSpacing = font_extents.height;
if (lineSpacing < font_extents.ascent + font_extents.descent)
lineSpacing = font_extents.ascent + font_extents.descent;
m_fontMetrics.setLineSpacing(lroundf(lineSpacing));
m_fontMetrics.setLineGap(lineSpacing - font_extents.ascent - font_extents.descent);
cairo_scaled_font_text_extents(m_platformData.scaledFont(), "x", &text_extents);
m_fontMetrics.setXHeight(text_extents.height);
cairo_scaled_font_text_extents(m_platformData.scaledFont(), " ", &text_extents);
m_spaceWidth = static_cast<float>(text_extents.x_advance);
m_syntheticBoldOffset = m_platformData.syntheticBold() ? 1.0f : 0.f;
}
CairoFont::CairoFont(cairo_scaled_font_t* fontface)
{
mFontFace=fontface;
cairo_scaled_font_reference(mFontFace);
cairo_scaled_font_extents(mFontFace,&mFontExtents);
SetFontColor(Color(0,0,0,255));
}
void SimpleFontData::platformInit()
{
if(!m_platformData.m_scaledFont)
{
ASSERT(m_platformData.m_scaledFont);
return;
}
cairo_font_extents_t font_extents;
cairo_text_extents_t text_extents;
cairo_scaled_font_extents(m_platformData.m_scaledFont, &font_extents);
m_ascent = static_cast<int>(lroundf(font_extents.ascent));
m_descent = static_cast<int>(lroundf(font_extents.descent));
m_lineSpacing = static_cast<int>(lroundf(font_extents.height));
// There seems to be some rounding error in cairo (or in how we
// use cairo) with some fonts, like DejaVu Sans Mono, which makes
// cairo report a height smaller than ascent + descent, which is
// wrong and confuses WebCore's layout system. Workaround this
// while we figure out what's going on.
if (m_lineSpacing < m_ascent + m_descent)
m_lineSpacing = m_ascent + m_descent;
cairo_scaled_font_text_extents(m_platformData.m_scaledFont, "x", &text_extents);
m_xHeight = text_extents.height;
cairo_scaled_font_text_extents(m_platformData.m_scaledFont, " ", &text_extents);
m_spaceWidth = static_cast<float>(text_extents.x_advance);
m_lineGap = m_lineSpacing - m_ascent - m_descent;
m_syntheticBoldOffset = m_platformData.syntheticBold() ? 1.0f : 0.f;
}
void SimpleFontData::platformInit()
{
if (!m_platformData.m_size)
return;
ASSERT(m_platformData.scaledFont());
cairo_font_extents_t font_extents;
cairo_text_extents_t text_extents;
cairo_scaled_font_extents(m_platformData.scaledFont(), &font_extents);
float ascent = narrowPrecisionToFloat(font_extents.ascent);
float descent = narrowPrecisionToFloat(font_extents.descent);
float lineGap = narrowPrecisionToFloat(font_extents.height - font_extents.ascent - font_extents.descent);
m_fontMetrics.setAscent(ascent);
m_fontMetrics.setDescent(descent);
#if PLATFORM(EFL)
m_fontMetrics.setLineSpacing(ascent + descent + lineGap);
#else
// Match CoreGraphics metrics.
m_fontMetrics.setLineSpacing(lroundf(ascent) + lroundf(descent) + lroundf(lineGap));
#endif
m_fontMetrics.setLineGap(lineGap);
cairo_scaled_font_text_extents(m_platformData.scaledFont(), "x", &text_extents);
m_fontMetrics.setXHeight(narrowPrecisionToFloat(text_extents.height));
cairo_scaled_font_text_extents(m_platformData.scaledFont(), " ", &text_extents);
m_spaceWidth = narrowPrecisionToFloat(text_extents.x_advance);
m_syntheticBoldOffset = m_platformData.syntheticBold() ? 1.0f : 0.f;
}
void Font::platformInit()
{
if (!m_platformData.size())
return;
ASSERT(m_platformData.scaledFont());
cairo_font_extents_t fontExtents;
cairo_scaled_font_extents(m_platformData.scaledFont(), &fontExtents);
float ascent = narrowPrecisionToFloat(fontExtents.ascent);
float descent = narrowPrecisionToFloat(fontExtents.descent);
float capHeight = narrowPrecisionToFloat(fontExtents.height);
float lineGap = narrowPrecisionToFloat(fontExtents.height - fontExtents.ascent - fontExtents.descent);
{
CairoFtFaceLocker cairoFtFaceLocker(m_platformData.scaledFont());
// If the USE_TYPO_METRICS flag is set in the OS/2 table then we use typo metrics instead.
FT_Face freeTypeFace = cairoFtFaceLocker.ftFace();
TT_OS2* OS2Table = freeTypeFace ? static_cast<TT_OS2*>(FT_Get_Sfnt_Table(freeTypeFace, ft_sfnt_os2)) : nullptr;
if (OS2Table) {
const FT_Short kUseTypoMetricsMask = 1 << 7;
if (OS2Table->fsSelection & kUseTypoMetricsMask) {
// FT_Size_Metrics::y_scale is in 16.16 fixed point format.
// Its (fractional) value is a factor that converts vertical metrics from design units to units of 1/64 pixels.
double yscale = (freeTypeFace->size->metrics.y_scale / 65536.0) / 64.0;
ascent = narrowPrecisionToFloat(yscale * OS2Table->sTypoAscender);
descent = -narrowPrecisionToFloat(yscale * OS2Table->sTypoDescender);
lineGap = narrowPrecisionToFloat(yscale * OS2Table->sTypoLineGap);
}
}
}
m_fontMetrics.setAscent(ascent);
m_fontMetrics.setDescent(descent);
m_fontMetrics.setCapHeight(capHeight);
#if PLATFORM(EFL)
m_fontMetrics.setLineSpacing(ascent + descent + lineGap);
#else
// Match CoreGraphics metrics.
m_fontMetrics.setLineSpacing(lroundf(ascent) + lroundf(descent) + lroundf(lineGap));
#endif
m_fontMetrics.setLineGap(lineGap);
cairo_text_extents_t textExtents;
cairo_scaled_font_text_extents(m_platformData.scaledFont(), "x", &textExtents);
m_fontMetrics.setXHeight(narrowPrecisionToFloat((platformData().orientation() == Horizontal) ? textExtents.height : textExtents.width));
cairo_scaled_font_text_extents(m_platformData.scaledFont(), " ", &textExtents);
m_spaceWidth = narrowPrecisionToFloat((platformData().orientation() == Horizontal) ? textExtents.x_advance : -textExtents.y_advance);
if ((platformData().orientation() == Vertical) && !isTextOrientationFallback()) {
CairoFtFaceLocker cairoFtFaceLocker(m_platformData.scaledFont());
FT_Face freeTypeFace = cairoFtFaceLocker.ftFace();
m_fontMetrics.setUnitsPerEm(freeTypeFace->units_per_EM);
}
m_syntheticBoldOffset = m_platformData.syntheticBold() ? 1.0f : 0.f;
}
static PyObject *
scaled_font_extents (PycairoScaledFont *o) {
cairo_font_extents_t e;
cairo_scaled_font_extents (o->scaled_font, &e);
RETURN_NULL_IF_CAIRO_SCALED_FONT_ERROR(o->scaled_font);
return Py_BuildValue ("(ddddd)", e.ascent, e.descent, e.height,
e.max_x_advance, e.max_y_advance);
}
static PangoFontMetrics *
create_metrics_for_context (PangoFont *font,
PangoContext *context)
{
PangoCairoWin32Font *cwfont = PANGO_CAIRO_WIN32_FONT (font);
PangoFontMetrics *metrics;
PangoFontDescription *font_desc;
PangoLayout *layout;
PangoRectangle extents;
PangoLanguage *language = pango_context_get_language (context);
const char *sample_str = pango_language_get_sample_string (language);
cairo_scaled_font_t *scaled_font;
cairo_font_extents_t font_extents;
double height;
metrics = pango_font_metrics_new ();
scaled_font = pango_cairo_win32_font_get_scaled_font (PANGO_CAIRO_FONT (cwfont));
cairo_scaled_font_extents (scaled_font, &font_extents);
cairo_win32_scaled_font_done_font (scaled_font);
metrics->ascent = font_extents.ascent * PANGO_SCALE;
metrics->descent = font_extents.descent * PANGO_SCALE;
/* FIXME: Should get the real settings for these from the TrueType
* font file.
*/
height = metrics->ascent + metrics->descent;
metrics->underline_thickness = height / 14;
metrics->underline_position = - metrics->underline_thickness;
metrics->strikethrough_thickness = metrics->underline_thickness;
metrics->strikethrough_position = height / 4;
pango_quantize_line_geometry (&metrics->underline_thickness,
&metrics->underline_position);
pango_quantize_line_geometry (&metrics->strikethrough_thickness,
&metrics->strikethrough_position);
layout = pango_layout_new (context);
font_desc = pango_font_describe_with_absolute_size (font);
pango_layout_set_font_description (layout, font_desc);
pango_layout_set_text (layout, sample_str, -1);
pango_layout_get_extents (layout, NULL, &extents);
metrics->approximate_char_width = extents.width / g_utf8_strlen (sample_str, -1);
pango_layout_set_text (layout, "0123456789", -1);
metrics->approximate_digit_width = max_glyph_width (layout);
pango_font_description_free (font_desc);
g_object_unref (layout);
return metrics;
}
static PyObject *
scaled_font_extents (PycairoScaledFont *o)
{
cairo_font_extents_t e;
cairo_scaled_font_extents (o->scaled_font, &e);
if (Pycairo_Check_Status (cairo_scaled_font_status(o->scaled_font)))
return NULL;
return Py_BuildValue ("(ddddd)", e.ascent, e.descent, e.height,
e.max_x_advance, e.max_y_advance);
}
static void
compute_glyph_extents (PangoFont *font,
PangoGlyph glyph,
PangoRectangle *ink_rect,
PangoRectangle *logical_rect)
{
PangoCairoFont *cfont = (PangoCairoFont *)font;
cairo_scaled_font_t *scaled_font = pango_cairo_win32_font_get_scaled_font (PANGO_CAIRO_FONT (cfont));
/* It may well be worth caching the font_extents here, since getting them
* is pretty expensive.
*/
cairo_font_extents_t font_extents;
cairo_text_extents_t extents;
cairo_glyph_t cairo_glyph;
cairo_scaled_font_extents (scaled_font, &font_extents);
logical_rect->x = 0;
logical_rect->y = - font_extents.ascent * PANGO_SCALE;
logical_rect->width = 0;
logical_rect->height = (font_extents.ascent + font_extents.descent) * PANGO_SCALE;
if (glyph == PANGO_GLYPH_EMPTY)
{
/* already initialized above */
}
else if (glyph & PANGO_GLYPH_UNKNOWN_FLAG)
{
/* space for the hex box */
_pango_cairo_get_glyph_extents_missing(cfont, glyph, ink_rect, logical_rect);
}
else
{
cairo_glyph.index = glyph;
cairo_glyph.x = 0;
cairo_glyph.y = 0;
cairo_scaled_font_glyph_extents (scaled_font,
&cairo_glyph, 1, &extents);
ink_rect->x = extents.x_bearing * PANGO_SCALE;
ink_rect->y = extents.y_bearing * PANGO_SCALE;
ink_rect->width = extents.width * PANGO_SCALE;
ink_rect->height = extents.height * PANGO_SCALE;
logical_rect->width = extents.x_advance * PANGO_SCALE;
}
}
static gboolean
_pango_cairo_font_private_glyph_extents_cache_init (PangoCairoFontPrivate *cf_priv)
{
cairo_scaled_font_t *scaled_font = _pango_cairo_font_private_get_scaled_font (cf_priv);
cairo_font_extents_t font_extents;
if (G_UNLIKELY (scaled_font == NULL || cairo_scaled_font_status (scaled_font) != CAIRO_STATUS_SUCCESS))
return FALSE;
cairo_scaled_font_extents (scaled_font, &font_extents);
cf_priv->font_extents.x = 0;
cf_priv->font_extents.width = 0;
cf_priv->font_extents.height = pango_units_from_double (font_extents.ascent + font_extents.descent);
switch (cf_priv->gravity)
{
default:
case PANGO_GRAVITY_AUTO:
case PANGO_GRAVITY_SOUTH:
cf_priv->font_extents.y = - pango_units_from_double (font_extents.ascent);
break;
case PANGO_GRAVITY_NORTH:
cf_priv->font_extents.y = - pango_units_from_double (font_extents.descent);
break;
case PANGO_GRAVITY_EAST:
case PANGO_GRAVITY_WEST:
{
int ascent = pango_units_from_double (font_extents.ascent + font_extents.descent) / 2;
if (cf_priv->is_hinted)
ascent = PANGO_UNITS_ROUND (ascent);
cf_priv->font_extents.y = - ascent;
}
}
cf_priv->glyph_extents_cache = g_new0 (PangoCairoFontGlyphExtentsCacheEntry, GLYPH_CACHE_NUM_ENTRIES);
/* Make sure all cache entries are invalid initially */
cf_priv->glyph_extents_cache[0].glyph = 1; /* glyph 1 cannot happen in bucket 0 */
return TRUE;
}
void SimpleFontData::platformInit()
{
if (!m_platformData.m_size)
return;
ASSERT(m_platformData.scaledFont());
cairo_font_extents_t fontExtents;
cairo_scaled_font_extents(m_platformData.scaledFont(), &fontExtents);
float ascent = narrowPrecisionToFloat(fontExtents.ascent);
float descent = narrowPrecisionToFloat(fontExtents.descent);
float lineGap = narrowPrecisionToFloat(fontExtents.height - fontExtents.ascent - fontExtents.descent);
m_fontMetrics.setAscent(ascent);
m_fontMetrics.setDescent(descent);
#if PLATFORM(EFL)
m_fontMetrics.setLineSpacing(ascent + descent + lineGap);
#else
// Match CoreGraphics metrics.
m_fontMetrics.setLineSpacing(lroundf(ascent) + lroundf(descent) + lroundf(lineGap));
#endif
m_fontMetrics.setLineGap(lineGap);
cairo_text_extents_t textExtents;
cairo_scaled_font_text_extents(m_platformData.scaledFont(), "x", &textExtents);
m_fontMetrics.setXHeight(narrowPrecisionToFloat((platformData().orientation() == Horizontal) ? textExtents.height : textExtents.width));
cairo_scaled_font_text_extents(m_platformData.scaledFont(), " ", &textExtents);
m_spaceWidth = narrowPrecisionToFloat((platformData().orientation() == Horizontal) ? textExtents.x_advance : -textExtents.y_advance);
if ((platformData().orientation() == Vertical) && !isTextOrientationFallback()) {
FT_Face freeTypeFace = cairo_ft_scaled_font_lock_face(m_platformData.scaledFont());
m_fontMetrics.setUnitsPerEm(freeTypeFace->units_per_EM);
cairo_ft_scaled_font_unlock_face(m_platformData.scaledFont());
}
m_syntheticBoldOffset = m_platformData.syntheticBold() ? 1.0f : 0.f;
}
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
const cairo_test_context_t *ctx = cairo_test_get_context (cr);
cairo_text_extents_t extents, nil_extents;
cairo_font_extents_t font_extents, nil_font_extents;
cairo_scaled_font_t *scaled_font;
cairo_select_font_face (cr, "Bitstream Vera Sans",
CAIRO_FONT_SLANT_NORMAL,
CAIRO_FONT_WEIGHT_NORMAL);
cairo_set_font_size (cr, 16);
cairo_move_to (cr, 10, 25);
cairo_show_text (cr, NULL);
cairo_show_text (cr, "");
cairo_show_glyphs (cr, NULL, 0);
cairo_show_glyphs (cr, (void*)8, 0);
cairo_move_to (cr, 10, 55);
cairo_text_path (cr, NULL);
cairo_text_path (cr, "");
cairo_glyph_path (cr, (void*)8, 0);
cairo_fill (cr);
memset (&nil_extents, 0, sizeof (cairo_text_extents_t));
memset (&extents, 0xff, sizeof (cairo_text_extents_t));
cairo_text_extents (cr, "", &extents);
if (! text_extents_equal (&extents, &nil_extents)) {
cairo_test_log (ctx, "Error: cairo_text_extents(\"\"); extents (%g, %g, %g, %g, %g, %g)\n",
extents.x_bearing, extents.y_bearing,
extents.width, extents.height,
extents.x_advance, extents.y_advance);
return CAIRO_TEST_FAILURE;
}
memset (&extents, 0xff, sizeof (cairo_text_extents_t));
cairo_text_extents (cr, NULL, &extents);
if (! text_extents_equal (&extents, &nil_extents)) {
cairo_test_log (ctx, "Error: cairo_text_extents(NULL); extents (%g, %g, %g, %g, %g, %g)\n",
extents.x_bearing, extents.y_bearing,
extents.width, extents.height,
extents.x_advance, extents.y_advance);
return CAIRO_TEST_FAILURE;
}
memset (&extents, 0xff, sizeof (cairo_text_extents_t));
cairo_glyph_extents (cr, (void*)8, 0, &extents);
if (! text_extents_equal (&extents, &nil_extents)) {
cairo_test_log (ctx, "Error: cairo_glyph_extents(); extents (%g, %g, %g, %g, %g, %g)\n",
extents.x_bearing, extents.y_bearing,
extents.width, extents.height,
extents.x_advance, extents.y_advance);
return CAIRO_TEST_FAILURE;
}
scaled_font = cairo_get_scaled_font (cr);
memset (&extents, 0xff, sizeof (cairo_text_extents_t));
cairo_scaled_font_text_extents (scaled_font, "", &extents);
if (! text_extents_equal (&extents, &nil_extents)) {
cairo_test_log (ctx, "Error: cairo_scaled_font_text_extents(\"\"); extents (%g, %g, %g, %g, %g, %g)\n",
extents.x_bearing, extents.y_bearing,
extents.width, extents.height,
extents.x_advance, extents.y_advance);
return CAIRO_TEST_FAILURE;
}
memset (&extents, 0xff, sizeof (cairo_text_extents_t));
cairo_scaled_font_text_extents (scaled_font, NULL, &extents);
if (! text_extents_equal (&extents, &nil_extents)) {
cairo_test_log (ctx, "Error: cairo_scaled_font_text_extents(NULL); extents (%g, %g, %g, %g, %g, %g)\n",
extents.x_bearing, extents.y_bearing,
extents.width, extents.height,
extents.x_advance, extents.y_advance);
return CAIRO_TEST_FAILURE;
}
memset (&extents, 0xff, sizeof (cairo_text_extents_t));
cairo_scaled_font_glyph_extents (scaled_font, (void*)8, 0, &extents);
if (! text_extents_equal (&extents, &nil_extents)) {
cairo_test_log (ctx, "Error: cairo_scaled_font_glyph_extents(NULL); extents (%g, %g, %g, %g, %g, %g)\n",
extents.x_bearing, extents.y_bearing,
extents.width, extents.height,
extents.x_advance, extents.y_advance);
return CAIRO_TEST_FAILURE;
}
/* Lets also try font size 0 while here */
cairo_set_font_size (cr, 0);
memset (&extents, 0xff, sizeof (cairo_text_extents_t));
cairo_text_extents (cr, "test", &extents);
if (! text_extents_equal (&extents, &nil_extents)) {
cairo_test_log (ctx, "Error: cairo_set_font_size(0); cairo_text_extents(\"test\"); extents (%g, %g, %g, %g, %g, %g)\n",
extents.x_bearing, extents.y_bearing,
extents.width, extents.height,
extents.x_advance, extents.y_advance);
return CAIRO_TEST_FAILURE;
}
memset (&nil_font_extents, 0, sizeof (cairo_font_extents_t));
memset (&font_extents, 0xff, sizeof (cairo_font_extents_t));
cairo_font_extents (cr, &font_extents);
if (! font_extents_equal (&font_extents, &nil_font_extents)) {
cairo_test_log (ctx, "Error: cairo_set_font_size(0); cairo_font_extents(); extents (%g, %g, %g, %g, %g)\n",
font_extents.ascent, font_extents.descent,
font_extents.height,
font_extents.max_x_advance, font_extents.max_y_advance);
return CAIRO_TEST_FAILURE;
}
scaled_font = cairo_get_scaled_font (cr);
memset (&font_extents, 0xff, sizeof (cairo_font_extents_t));
cairo_scaled_font_extents (scaled_font, &font_extents);
if (! font_extents_equal (&font_extents, &nil_font_extents)) {
cairo_test_log (ctx, "Error: cairo_set_font_size(0); cairo_scaled_font_extents(); extents (%g, %g, %g, %g, %g)\n",
font_extents.ascent, font_extents.descent,
font_extents.height,
font_extents.max_x_advance, font_extents.max_y_advance);
return CAIRO_TEST_FAILURE;
}
return CAIRO_TEST_SUCCESS;
}
static PangoCairoFontHexBoxInfo *
_pango_cairo_font_private_get_hex_box_info (PangoCairoFontPrivate *cf_priv)
{
static const char hexdigits[] = "0123456789ABCDEF";
char c[2] = {0, 0};
PangoFont *mini_font;
PangoCairoFontHexBoxInfo *hbi;
/* for metrics hinting */
double scale_x = 1., scale_x_inv = 1., scale_y = 1., scale_y_inv = 1.;
gboolean is_hinted;
int i;
int rows;
double pad;
double width = 0;
double height = 0;
cairo_font_options_t *font_options;
cairo_font_extents_t font_extents;
double size, mini_size;
PangoFontDescription *desc;
cairo_scaled_font_t *scaled_font, *scaled_mini_font;
PangoMatrix pango_ctm;
cairo_matrix_t cairo_ctm;
PangoGravity gravity;
if (!cf_priv)
return NULL;
if (cf_priv->hbi)
return cf_priv->hbi;
scaled_font = _pango_cairo_font_private_get_scaled_font (cf_priv);
if (G_UNLIKELY (scaled_font == NULL || cairo_scaled_font_status (scaled_font) != CAIRO_STATUS_SUCCESS))
return NULL;
is_hinted = cf_priv->is_hinted;
font_options = cairo_font_options_create ();
desc = pango_font_describe_with_absolute_size ((PangoFont *)cf_priv->cfont);
size = pango_font_description_get_size (desc) / (1.*PANGO_SCALE);
gravity = pango_font_description_get_gravity (desc);
cairo_scaled_font_get_ctm (scaled_font, &cairo_ctm);
cairo_scaled_font_get_font_options (scaled_font, font_options);
/* I started adding support for vertical hexboxes here, but it's too much
* work. Easier to do with cairo user fonts and vertical writing mode
* support in cairo.
*/
/*cairo_matrix_rotate (&cairo_ctm, pango_gravity_to_rotation (gravity));*/
pango_ctm.xx = cairo_ctm.xx;
pango_ctm.yx = cairo_ctm.yx;
pango_ctm.xy = cairo_ctm.xy;
pango_ctm.yy = cairo_ctm.yy;
pango_ctm.x0 = cairo_ctm.x0;
pango_ctm.y0 = cairo_ctm.y0;
if (is_hinted)
{
/* prepare for some hinting */
double x, y;
x = 1.; y = 0.;
cairo_matrix_transform_distance (&cairo_ctm, &x, &y);
scale_x = sqrt (x*x + y*y);
scale_x_inv = 1 / scale_x;
x = 0.; y = 1.;
cairo_matrix_transform_distance (&cairo_ctm, &x, &y);
scale_y = sqrt (x*x + y*y);
scale_y_inv = 1 / scale_y;
}
/* we hint to the nearest device units */
#define HINT(value, scale, scale_inv) (ceil ((value-1e-5) * scale) * scale_inv)
#define HINT_X(value) HINT ((value), scale_x, scale_x_inv)
#define HINT_Y(value) HINT ((value), scale_y, scale_y_inv)
/* create mini_font description */
{
PangoFontMap *fontmap;
PangoContext *context;
/* XXX this is racy. need a ref'ing getter... */
fontmap = pango_font_get_font_map ((PangoFont *)cf_priv->cfont);
if (!fontmap)
return NULL;
fontmap = g_object_ref (fontmap);
/* we inherit most font properties for the mini font. just
* change family and size. means, you get bold hex digits
* in the hexbox for a bold font.
*/
/* We should rotate the box, not glyphs */
pango_font_description_unset_fields (desc, PANGO_FONT_MASK_GRAVITY);
pango_font_description_set_family_static (desc, "monospace");
rows = 2;
mini_size = size / 2.2;
if (is_hinted)
{
mini_size = HINT_Y (mini_size);
if (mini_size < 6.0)
{
rows = 1;
mini_size = MIN (MAX (size - 1, 0), 6.0);
}
}
pango_font_description_set_absolute_size (desc, pango_units_from_double (mini_size));
/* load mini_font */
context = pango_font_map_create_context (fontmap);
pango_context_set_matrix (context, &pango_ctm);
pango_context_set_language (context, pango_script_get_sample_language (PANGO_SCRIPT_LATIN));
pango_cairo_context_set_font_options (context, font_options);
mini_font = pango_font_map_load_font (fontmap, context, desc);
g_object_unref (context);
g_object_unref (fontmap);
}
pango_font_description_free (desc);
cairo_font_options_destroy (font_options);
scaled_mini_font = pango_cairo_font_get_scaled_font ((PangoCairoFont *) mini_font);
for (i = 0 ; i < 16 ; i++)
{
cairo_text_extents_t extents;
c[0] = hexdigits[i];
cairo_scaled_font_text_extents (scaled_mini_font, c, &extents);
width = MAX (width, extents.width);
height = MAX (height, extents.height);
}
cairo_scaled_font_extents (scaled_font, &font_extents);
if (font_extents.ascent + font_extents.descent <= 0)
{
font_extents.ascent = PANGO_UNKNOWN_GLYPH_HEIGHT;
font_extents.descent = 0;
}
pad = (font_extents.ascent + font_extents.descent) / 43;
pad = MIN (pad, mini_size);
hbi = g_slice_new (PangoCairoFontHexBoxInfo);
hbi->font = (PangoCairoFont *) mini_font;
hbi->rows = rows;
hbi->digit_width = width;
hbi->digit_height = height;
hbi->pad_x = pad;
hbi->pad_y = pad;
if (is_hinted)
{
hbi->digit_width = HINT_X (hbi->digit_width);
hbi->digit_height = HINT_Y (hbi->digit_height);
hbi->pad_x = HINT_X (hbi->pad_x);
hbi->pad_y = HINT_Y (hbi->pad_y);
}
hbi->line_width = MIN (hbi->pad_x, hbi->pad_y);
hbi->box_height = 3 * hbi->pad_y + rows * (hbi->pad_y + hbi->digit_height);
if (rows == 1 || hbi->box_height <= font_extents.ascent)
{
hbi->box_descent = 2 * hbi->pad_y;
}
else if (hbi->box_height <= font_extents.ascent + font_extents.descent - 2 * hbi->pad_y)
{
hbi->box_descent = 2 * hbi->pad_y + hbi->box_height - font_extents.ascent;
}
else
{
hbi->box_descent = font_extents.descent * hbi->box_height /
(font_extents.ascent + font_extents.descent);
}
if (is_hinted)
{
hbi->box_descent = HINT_Y (hbi->box_descent);
}
cf_priv->hbi = hbi;
return hbi;
}
cairo_font_extents_t extents() override {
cairo_scaled_font_extents(m_scaled, &m_extents);
return m_extents;
}
