112 lines
2.4 KiB
C++
112 lines
2.4 KiB
C++
// texturefont.h
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//
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// Copyright (C) 2001, Chris Laurel <claurel@shatters.net>
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 2
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// of the License, or (at your option) any later version.
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#ifndef _TEXTUREFONT_H_
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#define _TEXTUREFONT_H_
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#include <vector>
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#include <string>
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#include <iostream>
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#include <celcompat/filesystem.h>
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class Renderer;
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class TextureFont
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{
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TextureFont(const Renderer*);
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public:
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TextureFont() = delete;
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~TextureFont();
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float render(wchar_t ch, float xoffset = 0.0f, float yoffset = 0.0f) const;
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float render(const std::string& s, float xoffset = 0.0f, float yoffset = 0.0f) const;
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int getWidth(const std::string&) const;
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int getWidth(int c) const;
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int getMaxWidth() const;
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int getHeight() const;
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int getMaxAscent() const;
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void setMaxAscent(int);
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int getMaxDescent() const;
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void setMaxDescent(int);
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short getAdvance(wchar_t c)
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{
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const Glyph* glyph = getGlyph(c);
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if (glyph == nullptr)
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glyph = getGlyph((wchar_t) '?');
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return glyph->advance;
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}
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int getTextureName() const;
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void bind();
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void unbind();
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void flush() {};
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bool buildTexture();
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public:
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struct TexCoord
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{
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float u, v;
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};
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struct Glyph
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{
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Glyph(unsigned short _id) : __id(_id) {};
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unsigned short __id;
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unsigned short width;
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unsigned short height;
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short x;
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short xoff;
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short y;
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short yoff;
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short advance;
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TexCoord texCoords[4];
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};
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enum
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{
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TxfByte = 0,
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TxfBitmap = 1,
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};
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private:
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void addGlyph(const Glyph&);
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const TextureFont::Glyph* getGlyph(wchar_t) const;
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void rebuildGlyphLookupTable();
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private:
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const Renderer *renderer;
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int maxAscent{ 0 };
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int maxDescent{ 0 };
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int maxWidth{ 0 };
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int texWidth{ 0 };
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int texHeight{ 0 };
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unsigned char* fontImage{ nullptr };
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unsigned int texName{ 0 };
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std::vector<Glyph> glyphs;
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const Glyph** glyphLookup{ nullptr };
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unsigned int glyphLookupTableSize{ 0 };
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public:
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static TextureFont* load(const Renderer*, std::istream& in);
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};
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TextureFont* LoadTextureFont(const Renderer*, const fs::path&);
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#endif // _TEXTUREFONT_H_
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