Ykkrosh
91169c82c7
Add optional clipping rectangle to CTextRenderer. Strings that are printed outside the vertical extent of the clipping rectangle will be immediately skipped. This greatly reduces the cost of large scrollable text boxes. This was SVN commit r14019.
105 lines
2.5 KiB
C++
105 lines
2.5 KiB
C++
/* Copyright (C) 2013 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef INCLUDED_FONT
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#define INCLUDED_FONT
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#include "graphics/Texture.h"
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#include "lib/res/handle.h"
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#include <map>
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class CStrW;
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struct UnifontGlyphData;
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/**
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* Storage for a bitmap font. Loaded by CFontManager.
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*/
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class CFont
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{
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friend class CFontManager;
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CFont() {}
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public:
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struct GlyphData
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{
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float u0, v0, u1, v1;
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i16 x0, y0, x1, y1;
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i16 xadvance;
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u8 defined;
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};
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/**
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* Relatively efficient lookup of GlyphData from 16-bit Unicode codepoint.
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* This is stored as a sparse 2D array, exploiting the knowledge that a font
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* typically only supports a small number of 256-codepoint blocks, so most
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* elements of m_Data will be NULL.
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*/
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class GlyphMap
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{
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NONCOPYABLE(GlyphMap);
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public:
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GlyphMap();
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~GlyphMap();
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void set(u16 i, const GlyphData& val);
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const GlyphData* get(u16 i) const
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{
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if (!m_Data[i >> 8])
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return NULL;
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if (!m_Data[i >> 8][i & 0xff].defined)
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return NULL;
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return &m_Data[i >> 8][i & 0xff];
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}
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private:
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GlyphData* m_Data[256];
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};
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bool HasRGB() const { return m_HasRGB; }
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int GetLineSpacing() const { return m_LineSpacing; }
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int GetHeight() const { return m_Height; }
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int GetCharacterWidth(wchar_t c) const;
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void CalculateStringSize(const wchar_t* string, int& w, int& h) const;
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void GetGlyphBounds(float& x0, float& y0, float& x1, float& y1) const
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{
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x0 = m_BoundsX0;
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y0 = m_BoundsY0;
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x1 = m_BoundsX1;
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y1 = m_BoundsY1;
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}
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const GlyphMap& GetGlyphs() const { return m_Glyphs; }
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CTexturePtr GetTexture() const { return m_Texture; }
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private:
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CTexturePtr m_Texture;
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bool m_HasRGB; // true if RGBA, false if ALPHA
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GlyphMap m_Glyphs;
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int m_LineSpacing;
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int m_Height; // height of a capital letter, roughly
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// Bounding box of all glyphs
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float m_BoundsX0;
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float m_BoundsY0;
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float m_BoundsX1;
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float m_BoundsY1;
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};
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#endif // INCLUDED_FONT
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