/* static */
int FontUtils::FontScore(const unordered_map<char32, inT64>& ch_map,
const string& fontname,
int* raw_score,
vector<bool>* ch_flags) {
PangoFontInfo font_info;
if (!font_info.ParseFontDescriptionName(fontname)) {
tprintf("ERROR: Could not parse %s\n", fontname.c_str());
}
PangoFont* font = font_info.ToPangoFont();
PangoCoverage* coverage = pango_font_get_coverage(font, NULL);
if (ch_flags) {
ch_flags->clear();
ch_flags->reserve(ch_map.size());
}
*raw_score = 0;
int ok_chars = 0;
for (unordered_map<char32, inT64>::const_iterator it = ch_map.begin();
it != ch_map.end(); ++it) {
bool covered = (IsWhitespace(it->first) ||
(pango_coverage_get(coverage, it->first)
== PANGO_COVERAGE_EXACT));
if (covered) {
++(*raw_score);
ok_chars += it->second;
}
if (ch_flags) {
ch_flags->push_back(covered);
}
}
return ok_chars;
}
/* static */
void FontUtils::GetAllRenderableCharacters(const string& font_name,
vector<bool>* unichar_bitmap) {
PangoFontInfo font_info(font_name);
PangoCoverage* coverage = pango_font_get_coverage(
font_info.ToPangoFont(), NULL);
CharCoverageMapToBitmap(coverage, unichar_bitmap);
}
int PangoFontInfo::DropUncoveredChars(string* utf8_text) const {
PangoFont* font = ToPangoFont();
PangoCoverage* coverage = pango_font_get_coverage(font, NULL);
int num_dropped_chars = 0;
// Maintain two iterators that point into the string. For space efficiency, we
// will repeatedly copy one covered UTF8 character from one to the other, and
// at the end resize the string to the right length.
char* out = const_cast<char*>(utf8_text->c_str());
const UNICHAR::const_iterator it_begin =
UNICHAR::begin(utf8_text->c_str(), utf8_text->length());
const UNICHAR::const_iterator it_end =
UNICHAR::end(utf8_text->c_str(), utf8_text->length());
for (UNICHAR::const_iterator it = it_begin; it != it_end; ++it) {
// Skip bad utf-8.
if (!it.is_legal())
continue; // One suitable error message will still be issued.
if (!IsWhitespace(*it) && !pango_is_zero_width(*it) &&
pango_coverage_get(coverage, *it) != PANGO_COVERAGE_EXACT) {
if (TLOG_IS_ON(2)) {
char tmp[5];
int len = it.get_utf8(tmp);
tmp[len] = '\0';
tlog(2, "'%s' (U+%x) not covered by font\n", tmp, *it);
}
++num_dropped_chars;
continue;
}
strncpy(out, it.utf8_data(), it.utf8_len());
out += it.utf8_len();
}
utf8_text->resize(out - utf8_text->c_str());
return num_dropped_chars;
}
static VALUE
rg_get_coverage(VALUE self, VALUE language)
{
PangoCoverage* c = pango_font_get_coverage(_SELF(self),
RVAL2PANGOLANGUAGE(language));
return PANGOCOVERAGE2RVAL(c);
}
static PangoCoverageLevel
pango_engine_shape_real_covers (PangoEngineShape *engine,
PangoFont *font,
PangoLanguage *language,
gunichar wc)
{
PangoCoverage *coverage = pango_font_get_coverage (font, language);
PangoCoverageLevel result = pango_coverage_get (coverage, wc);
pango_coverage_unref (coverage);
return result;
}
/* static */
void FontUtils::GetAllRenderableCharacters(const vector<string>& fonts,
vector<bool>* unichar_bitmap) {
// Form the union of coverage maps from the fonts
PangoCoverage* all_coverage = pango_coverage_new();
tlog(1, "Processing %d fonts\n", fonts.size());
for (int i = 0; i < fonts.size(); ++i) {
PangoFontInfo font_info(fonts[i]);
PangoCoverage* coverage = pango_font_get_coverage(
font_info.ToPangoFont(), NULL);
// Mark off characters that any font can render.
pango_coverage_max(all_coverage, coverage);
}
CharCoverageMapToBitmap(all_coverage, unichar_bitmap);
pango_coverage_unref(all_coverage);
}
bool SimpleFontData::containsCharacters(const UChar* characters, int length) const
{
bool result = true;
PangoCoverage* coverage = pango_font_get_coverage(m_platformData.m_font, pango_language_get_default());
for (int i = 0; i < length; i++) {
if (PANGO_COVERAGE_NONE == pango_coverage_get(coverage, characters[i])) {
result = false;
break;
}
}
pango_coverage_unref(coverage);
return result;
}
bool PangoFontInfo::CoversUTF8Text(const char* utf8_text, int byte_length) const {
PangoFont* font = ToPangoFont();
PangoCoverage* coverage = pango_font_get_coverage(font, NULL);
for (UNICHAR::const_iterator it = UNICHAR::begin(utf8_text, byte_length);
it != UNICHAR::end(utf8_text, byte_length);
++it) {
if (IsWhitespace(*it) || pango_is_zero_width(*it))
continue;
if (pango_coverage_get(coverage, *it) != PANGO_COVERAGE_EXACT) {
char tmp[5];
int len = it.get_utf8(tmp);
tmp[len] = '\0';
tlog(2, "'%s' (U+%x) not covered by font\n", tmp, *it);
return false;
}
}
return true;
}
{
}
static void
pango_engine_lang_class_init (PangoEngineLangClass *klass)
{
}
static PangoCoverageLevel
pango_engine_shape_real_covers (PangoEngineShape *engine G_GNUC_UNUSED,
PangoFont *font,
PangoLanguage *language,
gunichar wc)
{
PangoCoverage *coverage = pango_font_get_coverage (font, language);
PangoCoverageLevel result = pango_coverage_get (coverage, wc);
pango_coverage_unref (coverage);
return result;
}
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
G_DEFINE_ABSTRACT_TYPE (PangoEngineShape, pango_engine_shape, PANGO_TYPE_ENGINE);
G_GNUC_END_IGNORE_DEPRECATIONS
static void
pango_engine_shape_init (PangoEngineShape *klass)
{
}
static void
basic_engine_shape (PangoEngineShape *engine,
PangoFont *font,
const char *text,
gint length,
const PangoAnalysis *analysis,
PangoGlyphString *glyphs)
{
const char *p;
char *copy;
CTLineRef line;
CFStringRef cstr;
CFDictionaryRef attributes;
CFAttributedStringRef attstr;
PangoCoreTextFont *cfont = PANGO_CORE_TEXT_FONT (font);
PangoCoverage *coverage;
CFArrayRef runs;
CTRunRef run;
CTRunStatus run_status;
CFIndex i, glyph_count;
const CGGlyph *cgglyphs;
CFTypeRef keys[] = {
(CFTypeRef) kCTFontAttributeName
};
CFTypeRef values[] = {
pango_core_text_font_get_ctfont (cfont)
};
attributes = CFDictionaryCreate (kCFAllocatorDefault,
(const void **)keys,
(const void **)values,
1,
&kCFCopyStringDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks);
copy = g_strndup (text, length + 1);
copy[length] = 0;
cstr = CFStringCreateWithCString (kCFAllocatorDefault, copy,
kCFStringEncodingUTF8);
g_free (copy);
attstr = CFAttributedStringCreate (kCFAllocatorDefault,
cstr,
attributes);
line = CTLineCreateWithAttributedString (attstr);
runs = CTLineGetGlyphRuns (line);
/* Since Pango divides things into runs already, we assume there is
* only a single run in this line.
*/
run = CFArrayGetValueAtIndex (runs, 0);
run_status = CTRunGetStatus (run);
glyph_count = CTRunGetGlyphCount (run);
cgglyphs = CTRunGetGlyphsPtr (run);
p = text;
pango_glyph_string_set_size (glyphs, glyph_count);
coverage = pango_font_get_coverage (PANGO_FONT (cfont),
analysis->language);
for (i = 0; i < glyph_count; i++)
{
CFIndex real_i, prev_i;
gunichar wc;
gunichar mirrored_ch;
wc = g_utf8_get_char (p);
if (analysis->level % 2)
if (pango_get_mirror_char (wc, &mirrored_ch))
wc = mirrored_ch;
if (run_status & kCTRunStatusRightToLeft)
{
real_i = glyph_count - i - 1;
prev_i = real_i + 1;
}
else
{
real_i = i;
prev_i = real_i - 1;
}
if (wc == 0xa0) /* non-break-space */
wc = 0x20;
if (pango_is_zero_width (wc))
{
set_glyph (font, glyphs, real_i, p - text, PANGO_GLYPH_EMPTY);
}
else
{
PangoCoverageLevel result;
result = pango_coverage_get (coverage, wc);
if (result != PANGO_COVERAGE_NONE)
{
set_glyph (font, glyphs, real_i, p - text, cgglyphs[real_i]);
if (g_unichar_type (wc) == G_UNICODE_NON_SPACING_MARK)
{
if (i > 0)
{
PangoRectangle logical_rect, ink_rect;
glyphs->glyphs[real_i].geometry.width = MAX (glyphs->glyphs[prev_i].geometry.width,
glyphs->glyphs[prev_i].geometry.width);
glyphs->glyphs[prev_i].geometry.width = 0;
glyphs->log_clusters[real_i] = glyphs->log_clusters[prev_i];
/* Some heuristics to try to guess how overstrike glyphs are
* done and compensate
*/
pango_font_get_glyph_extents (font, glyphs->glyphs[real_i].glyph, &ink_rect, &logical_rect);
if (logical_rect.width == 0 && ink_rect.x == 0)
glyphs->glyphs[real_i].geometry.x_offset = (glyphs->glyphs[real_i].geometry.width - ink_rect.width) / 2;
}
}
}
else
{
set_glyph (font, glyphs, real_i, p - text,
PANGO_GET_UNKNOWN_GLYPH (wc));
}
}
p = g_utf8_next_char (p);
}
CFRelease (line);
CFRelease (attstr);
CFRelease (cstr);
CFRelease (attributes);
pango_coverage_unref (coverage);
}
