JSBool
pango::JSContext::Constructor(::JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval) {
DOC_BEGIN("");
DOC_END;
if (JSA_GetClass(cx,obj) != Class()) {
JS_ReportError(cx,"Constructor for %s bad object; did you forget a 'new'?",ClassName());
return JS_FALSE;
}
pango::JSContext * myNewObject = 0;
NATIVE * newNative = 0;
if (argc == 0) {
PangoContext * myContext = pango_context_new();
newNative = new NATIVE(myContext, false);
} else {
JS_ReportError(cx,"Constructor for %s: bad number of arguments: expected none () %d",ClassName(), argc);
return JS_FALSE;
}
myNewObject = new pango::JSContext(OWNERPTR(newNative), newNative);
if (myNewObject) {
JS_SetPrivate(cx,obj,myNewObject);
return JS_TRUE;
}
JS_ReportError(cx,"pango::JSContext::Constructor: bad parameters");
return JS_FALSE;
}
PangoLayout * VwGraphicsCairo::GetPangoLayoutHelper()
{
if (m_fontMap == NULL)
m_fontMap = pango_cairo_font_map_get_default();
if (m_context == NULL)
{ m_context = pango_context_new();
pango_context_set_font_map(m_context, m_fontMap);
}
if (m_layout == NULL)
{
m_layout = pango_layout_new(m_context);
PangoAttrList* list = pango_attr_list_new();
PangoAttribute * fallbackAttrib = pango_attr_fallback_new(true);
pango_attr_list_insert(list, fallbackAttrib);
pango_layout_set_attributes(m_layout, list);
pango_attr_list_unref(list);
pango_layout_set_single_paragraph_mode(m_layout, true);
}
return m_layout;
}
/* Create/get a pango context
*
* On windows we use the win32 context creator, on everything else we
* use the cairo one.
*/
PangoContext *
splitter_create_pango_context(void) {
#ifdef _WIN32
return pango_win32_get_context();
#else
return pango_context_new();
#endif
}
// Returns the PangoFont structure corresponding to the closest available font
// in the font map. Note that if the font is wholly missing, this could
// correspond to a completely different font family and face.
PangoFont* PangoFontInfo::ToPangoFont() const {
InitFontconfig();
PangoFontMap* font_map = pango_cairo_font_map_get_default();
PangoContext* context = pango_context_new();
pango_cairo_context_set_resolution(context, resolution_);
pango_context_set_font_map(context, font_map);
PangoFont* font = NULL;
{
DISABLE_HEAP_LEAK_CHECK;
font = pango_font_map_load_font(font_map, context, desc_);
}
g_object_unref(context);
return font;
}
static PangoFontMetrics *
pango_cairo_win32_font_get_metrics (PangoFont *font,
PangoLanguage *language)
{
PangoWin32Font *win32font = PANGO_WIN32_FONT (font);
PangoCairoWin32Font *cwfont = PANGO_CAIRO_WIN32_FONT (font);
PangoWin32MetricsInfo *info = NULL; /* Quiet gcc */
GSList *tmp_list;
const char *sample_str = pango_language_get_sample_string (language);
tmp_list = cwfont->metrics_by_lang;
while (tmp_list)
{
info = tmp_list->data;
if (info->sample_str == sample_str) /* We _don't_ need strcmp */
break;
tmp_list = tmp_list->next;
}
if (!tmp_list)
{
PangoContext *context;
if (!win32font->fontmap)
return pango_font_metrics_new ();
info = g_slice_new0 (PangoWin32MetricsInfo);
cwfont->metrics_by_lang = g_slist_prepend (cwfont->metrics_by_lang,
info);
info->sample_str = sample_str;
context = pango_context_new ();
pango_context_set_font_map (context, win32font->fontmap);
pango_context_set_language (context, language);
pango_cairo_context_set_font_options (context, cwfont->options);
info->metrics = create_metrics_for_context (font, context);
g_object_unref (context);
}
return pango_font_metrics_ref (info->metrics);
}
MapPainterSVG::MapPainterSVG(const StyleConfigRef& styleConfig)
: MapPainter(styleConfig,
new CoordBufferImpl<Vertex2D>()),
coordBuffer((CoordBufferImpl<Vertex2D>*)transBuffer.buffer),
stream(NULL),
typeConfig(NULL)
{
#if defined(OSMSCOUT_MAP_SVG_HAVE_LIB_PANGO)
#if !defined(GLIB_VERSION_2_36)
/* Compatibility call for glibc versions prior to 2.36 */
g_type_init();
#endif
pangoContext=pango_context_new();
pangoFontMap=pango_ft2_font_map_new();
pango_context_set_font_map(pangoContext,
pangoFontMap);
#endif
}
/* static */
bool FontUtils::IsAvailableFont(const char* input_query_desc) {
string query_desc(input_query_desc);
if (PANGO_VERSION <= 12005) {
// Strip commas and any ' Medium' substring in the name.
query_desc.erase(std::remove(query_desc.begin(), query_desc.end(), ','),
query_desc.end());
const string kMediumStr = " Medium";
std::size_t found = query_desc.find(kMediumStr);
if (found != std::string::npos) {
query_desc.erase(found, kMediumStr.length());
}
}
PangoFontDescription *desc = pango_font_description_from_string(
query_desc.c_str());
PangoFont* selected_font = NULL;
{
InitFontconfig();
PangoFontMap* font_map = pango_cairo_font_map_get_default();
PangoContext* context = pango_context_new();
pango_context_set_font_map(context, font_map);
{
DISABLE_HEAP_LEAK_CHECK;
selected_font = pango_font_map_load_font(font_map, context, desc);
}
g_object_unref(context);
}
PangoFontDescription* selected_desc = pango_font_describe(selected_font);
bool equal = pango_font_description_equal(desc, selected_desc);
tlog(3, "query weight = %d \t selected weight =%d\n",
pango_font_description_get_weight(desc),
pango_font_description_get_weight(selected_desc));
char* selected_desc_str = pango_font_description_to_string(selected_desc);
tlog(2, "query_desc: '%s' Selected: 's'\n", query_desc.c_str(),
selected_desc_str);
g_free(selected_desc_str);
pango_font_description_free(selected_desc);
pango_font_description_free(desc);
return equal;
}
bool PangoFontInfo::CanRenderString(const char* utf8_word, int len,
vector<string>* graphemes) const {
if (graphemes) graphemes->clear();
// We check for font coverage of the text first, as otherwise Pango could
// (undesirably) fall back to another font that does have the required
// coverage.
if (!CoversUTF8Text(utf8_word, len)) {
return false;
}
// U+25CC dotted circle character that often (but not always) gets rendered
// when there is an illegal grapheme sequence.
const char32 kDottedCircleGlyph = 9676;
bool bad_glyph = false;
PangoFontMap* font_map = pango_cairo_font_map_get_default();
PangoContext* context = pango_context_new();
pango_context_set_font_map(context, font_map);
PangoLayout* layout;
{
// Pango is not relasing the cached layout.
DISABLE_HEAP_LEAK_CHECK;
layout = pango_layout_new(context);
}
if (desc_) {
pango_layout_set_font_description(layout, desc_);
} else {
PangoFontDescription *desc = pango_font_description_from_string(
DescriptionName().c_str());
pango_layout_set_font_description(layout, desc);
pango_font_description_free(desc);
}
pango_layout_set_text(layout, utf8_word, len);
PangoLayoutIter* run_iter = NULL;
{ // Fontconfig caches some information here that is not freed before exit.
DISABLE_HEAP_LEAK_CHECK;
run_iter = pango_layout_get_iter(layout);
}
do {
PangoLayoutRun* run = pango_layout_iter_get_run_readonly(run_iter);
if (!run) {
tlog(2, "Found end of line NULL run marker\n");
continue;
}
PangoGlyph dotted_circle_glyph;
PangoFont* font = run->item->analysis.font;
dotted_circle_glyph = pango_fc_font_get_glyph(
reinterpret_cast<PangoFcFont*>(font), kDottedCircleGlyph);
if (TLOG_IS_ON(2)) {
PangoFontDescription* desc = pango_font_describe(font);
char* desc_str = pango_font_description_to_string(desc);
tlog(2, "Desc of font in run: %s\n", desc_str);
g_free(desc_str);
pango_font_description_free(desc);
}
PangoGlyphItemIter cluster_iter;
gboolean have_cluster;
for (have_cluster = pango_glyph_item_iter_init_start(&cluster_iter,
run, utf8_word);
have_cluster && !bad_glyph;
have_cluster = pango_glyph_item_iter_next_cluster(&cluster_iter)) {
const int start_byte_index = cluster_iter.start_index;
const int end_byte_index = cluster_iter.end_index;
int start_glyph_index = cluster_iter.start_glyph;
int end_glyph_index = cluster_iter.end_glyph;
string cluster_text = string(utf8_word + start_byte_index,
end_byte_index - start_byte_index);
if (graphemes) graphemes->push_back(cluster_text);
if (IsUTF8Whitespace(cluster_text.c_str())) {
tlog(2, "Skipping whitespace\n");
continue;
}
if (TLOG_IS_ON(2)) {
printf("start_byte=%d end_byte=%d start_glyph=%d end_glyph=%d ",
start_byte_index, end_byte_index,
start_glyph_index, end_glyph_index);
}
for (int i = start_glyph_index,
step = (end_glyph_index > start_glyph_index) ? 1 : -1;
!bad_glyph && i != end_glyph_index; i+= step) {
const bool unknown_glyph =
(cluster_iter.glyph_item->glyphs->glyphs[i].glyph &
PANGO_GLYPH_UNKNOWN_FLAG);
const bool illegal_glyph =
(cluster_iter.glyph_item->glyphs->glyphs[i].glyph ==
dotted_circle_glyph);
bad_glyph = unknown_glyph || illegal_glyph;
if (TLOG_IS_ON(2)) {
printf("(%d=%d)", cluster_iter.glyph_item->glyphs->glyphs[i].glyph,
bad_glyph ? 1 : 0);
}
}
if (TLOG_IS_ON(2)) {
printf(" '%s'\n", cluster_text.c_str());
}
if (bad_glyph)
tlog(1, "Found illegal glyph!\n");
}
} while (!bad_glyph && pango_layout_iter_next_run(run_iter));
pango_layout_iter_free(run_iter);
g_object_unref(context);
g_object_unref(layout);
if (bad_glyph && graphemes) graphemes->clear();
return !bad_glyph;
}
