109 lines
3.1 KiB
C++
109 lines
3.1 KiB
C++
#ifndef STAR_TEXT_PAINTER_HPP
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#define STAR_TEXT_PAINTER_HPP
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#include "StarFontTextureGroup.hpp"
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#include "StarAnchorTypes.hpp"
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#include "StarRoot.hpp"
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#include "StarStringView.hpp"
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namespace Star {
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STAR_CLASS(TextPainter);
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enum class FontMode {
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Normal,
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Shadow
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};
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float const DefaultLineSpacing = 1.3f;
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struct TextPositioning {
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TextPositioning();
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TextPositioning(Vec2F pos,
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HorizontalAnchor hAnchor = HorizontalAnchor::LeftAnchor,
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VerticalAnchor vAnchor = VerticalAnchor::BottomAnchor,
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Maybe<unsigned> wrapWidth = {},
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Maybe<unsigned> charLimit = {});
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TextPositioning(Json const& v);
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Json toJson() const;
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TextPositioning translated(Vec2F translation) const;
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Vec2F pos;
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HorizontalAnchor hAnchor;
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VerticalAnchor vAnchor;
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Maybe<unsigned> wrapWidth;
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Maybe<unsigned> charLimit;
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};
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// Renders text while caching individual glyphs for fast rendering but with *no
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// kerning*.
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class TextPainter {
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public:
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TextPainter(RendererPtr renderer, TextureGroupPtr textureGroup);
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RectF renderText(StringView s, TextPositioning const& position);
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RectF renderLine(StringView s, TextPositioning const& position);
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RectF renderGlyph(String::Char c, TextPositioning const& position);
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RectF determineTextSize(StringView s, TextPositioning const& position);
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RectF determineLineSize(StringView s, TextPositioning const& position);
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RectF determineGlyphSize(String::Char c, TextPositioning const& position);
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int glyphWidth(String::Char c);
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int stringWidth(StringView s);
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typedef function<bool(StringView, int)> WrapTextCallback;
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bool processWrapText(StringView s, unsigned* wrapWidth, WrapTextCallback textFunc);
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List<StringView> wrapTextViews(StringView s, Maybe<unsigned> wrapWidth);
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StringList wrapText(StringView s, Maybe<unsigned> wrapWidth);
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unsigned fontSize() const;
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void setFontSize(unsigned size);
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void setLineSpacing(float lineSpacing);
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void setMode(FontMode mode);
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void setFontColor(Vec4B color);
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void setProcessingDirectives(StringView directives);
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void setFont(String const& font);
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void addFont(FontPtr const& font, String const& name);
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void reloadFonts();
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void cleanup(int64_t textureTimeout);
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void applyCommands(StringView unsplitCommands);
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private:
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struct RenderSettings {
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FontMode mode;
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Vec4B color;
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String font;
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Directives directives;
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};
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RectF doRenderText(StringView s, TextPositioning const& position, bool reallyRender, unsigned* charLimit);
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RectF doRenderLine(StringView s, TextPositioning const& position, bool reallyRender, unsigned* charLimit);
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RectF doRenderGlyph(String::Char c, TextPositioning const& position, bool reallyRender);
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void renderGlyph(String::Char c, Vec2F const& screenPos, unsigned fontSize, float scale, Vec4B const& color, Directives const* processingDirectives = nullptr);
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static FontPtr loadFont(String const& fontPath, Maybe<String> fontName = {});
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RendererPtr m_renderer;
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FontTextureGroup m_fontTextureGroup;
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unsigned m_fontSize;
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float m_lineSpacing;
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RenderSettings m_renderSettings;
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RenderSettings m_savedRenderSettings;
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String m_nonRenderedCharacters;
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TrackerListenerPtr m_reloadTracker;
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};
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}
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#endif
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