5be16a658a
The text layouter system can now support using different fonts for different glyphs, including mixing scalable and sprite glyphs.
50 lines
1.9 KiB
C++
50 lines
1.9 KiB
C++
/*
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* This file is part of OpenTTD.
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* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
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* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file gfx_layout_fallback.h Functions related to laying out the texts as fallback. */
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#ifndef GFX_LAYOUT_FALLBACK_H
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#define GFX_LAYOUT_FALLBACK_H
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#include "gfx_layout.h"
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/**
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* Helper class to construct a new #FallbackParagraphLayout.
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*/
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class FallbackParagraphLayoutFactory {
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public:
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/** Helper for GetLayouter, to get the right type. */
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typedef char32_t CharType;
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/** Helper for GetLayouter, to get whether the layouter supports RTL. */
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static const bool SUPPORTS_RTL = false;
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static std::unique_ptr<ParagraphLayouter> GetParagraphLayout(char32_t *buff, char32_t *buff_end, FontMap &font_mapping);
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static size_t AppendToBuffer(char32_t *buff, const char32_t *buffer_last, char32_t c);
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};
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/**
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* Swap paired brackets for fallback RTL layouting.
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* @param c Character to swap.
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* @return Swapped character, or original character if it is not a paired bracket.
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*/
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inline char32_t SwapRtlPairedCharacters(char32_t c)
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{
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/* There are many more paired brackets, but for fallback purposes we only handle ASCII brackets. */
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/* https://www.unicode.org/Public/UCD/latest/ucd/BidiBrackets.txt */
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switch (c) {
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case U'(': return U')';
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case U')': return U'(';
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case U'[': return U']';
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case U']': return U'[';
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case U'{': return U'}';
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case U'}': return U'{';
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default: return c;
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}
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}
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#endif /* GFX_LAYOUT_FALLBACK_H */
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