Cancelation in the middle of getting text shape
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@ -652,8 +652,9 @@ std::optional<Emboss::Glyph> Emboss::letter2glyph(const FontFile &font,
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}
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ExPolygons Emboss::text2shapes(FontFileWithCache &font_with_cache,
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const char * text,
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const FontProp &font_prop)
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const char *text,
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const FontProp &font_prop,
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std::function<bool()> was_canceled)
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{
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assert(font_with_cache.has_value());
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std::optional<stbtt_fontinfo> font_info_opt;
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@ -688,7 +689,11 @@ ExPolygons Emboss::text2shapes(FontFileWithCache &font_with_cache,
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if (wc == '\r') continue;
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int unicode = static_cast<int>(wc);
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const Glyph* glyph_ptr = Private::get_glyph(unicode, font, font_prop, cache, font_info_opt);
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// check cancelation only before unknown symbol - loading of symbol could be timeconsuming on slow computer and dificult fonts
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auto it = cache.find(unicode);
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if (it == cache.end() && was_canceled != nullptr && was_canceled()) return {};
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const Glyph *glyph_ptr = (it != cache.end())? &it->second :
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Private::get_glyph(unicode, font, font_prop, cache, font_info_opt);
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if (glyph_ptr == nullptr) continue;
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// move glyph to cursor position
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@ -152,8 +152,9 @@ public:
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/// <param name="font">Define fonts + cache, which could extend</param>
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/// <param name="text">Characters to convert</param>
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/// <param name="font_prop">User defined property of the font</param>
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/// <param name="was_canceled">Way to interupt processing</param>
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/// <returns>Inner polygon cw(outer ccw)</returns>
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static ExPolygons text2shapes(FontFileWithCache &font, const char *text, const FontProp &font_prop);
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static ExPolygons text2shapes(FontFileWithCache &font, const char *text, const FontProp &font_prop, std::function<bool()> was_canceled = nullptr);
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/// <summary>
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/// Fix intersections and self intersections in polygons glyph shape
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@ -45,8 +45,8 @@ void CreateFontImageJob::process(Ctl &ctl)
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text = text.substr(0, enter_pos);
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}
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ExPolygons shapes = Emboss::text2shapes(font_file_with_cache,
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text.c_str(), fp);
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std::function<bool()> was_canceled = [&ctl]() -> bool { return ctl.was_canceled(); };
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ExPolygons shapes = Emboss::text2shapes(font_file_with_cache, text.c_str(), fp, was_canceled);
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// normalize height of font
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BoundingBox bounding_box;
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for (ExPolygon &shape : shapes)
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@ -521,7 +521,7 @@ TriangleMesh priv::try_create_mesh(const EmbossDataBase &input, Emboss::FontFile
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assert(font.has_value());
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if (!font.has_value()) return {};
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ExPolygons shapes = Emboss::text2shapes(font, text, prop);
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ExPolygons shapes = Emboss::text2shapes(font, text, prop, was_canceled);
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if (shapes.empty()) return {};
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if (was_canceled()) return {};
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