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68 lines
2.1 KiB
C++
68 lines
2.1 KiB
C++
/*
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* Copyright 2013 Jeremie Roy. All rights reserved.
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* License: http://www.opensource.org/licenses/BSD-2-Clause
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*/
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#ifndef TEXT_METRICS_H_HEADER_GUARD
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#define TEXT_METRICS_H_HEADER_GUARD
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#include "font_manager.h"
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class TextMetrics
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{
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public:
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TextMetrics(FontManager* _fontManager);
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/// Append an ASCII/utf-8 string to the metrics helper.
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void appendText(FontHandle _fontHandle, const char* _string);
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/// Append a wide char string to the metrics helper.
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void appendText(FontHandle _fontHandle, const wchar_t* _string);
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/// Return the width of the measured text.
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float getWidth() const { return m_width; }
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/// Return the height of the measured text.
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float getHeight() const { return m_height; }
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private:
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FontManager* m_fontManager;
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float m_width;
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float m_height;
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float m_x;
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float m_lineHeight;
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float m_lineGap;
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};
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/// Compute text crop area for text using a single font.
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class TextLineMetrics
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{
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public:
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TextLineMetrics(const FontInfo& _fontInfo);
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/// Return the height of a line of text using the given font.
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float getLineHeight() const { return m_lineHeight; }
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/// Return the number of text line in the given text.
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uint32_t getLineCount(const char* _string) const;
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/// Return the number of text line in the given text.
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uint32_t getLineCount(const wchar_t* _string) const;
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/// Return the first and last character visible in the [_firstLine, _lastLine] range.
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void getSubText(const char* _string, uint32_t _firstLine, uint32_t _lastLine, const char*& _begin, const char*& _end);
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/// Return the first and last character visible in the [_firstLine, _lastLine] range.
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void getSubText(const wchar_t* _string, uint32_t _firstLine, uint32_t _lastLine, const wchar_t*& _begin, const wchar_t*& _end);
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/// Return the first and last character visible in the [_top, _bottom] range,
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void getVisibleText(const char* _string, float _top, float _bottom, const char*& _begin, const char*& _end);
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/// Return the first and last character visible in the [_top, _bottom] range,
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void getVisibleText(const wchar_t* _string, float _top, float _bottom, const wchar_t*& _begin, const wchar_t*& _end);
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private:
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float m_lineHeight;
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};
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#endif // TEXT_METRICS_H_HEADER_GUARD
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