88 lines
2.0 KiB
C
88 lines
2.0 KiB
C
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#pragma once
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#include <fostbite2D/core/color.h>
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#include <fostbite2D/core/types.h>
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#include <fostbite2D/core/math_types.h>
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#include <string>
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namespace frostbite2D {
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// ============================================================================
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// 字形信息
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// ============================================================================
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struct Glyph {
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float u0, v0; // 纹理坐标左下角
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float u1, v1; // 纹理坐标右上角
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float width; // 字形宽度（像素）
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float height; // 字形高度（像素）
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float bearingX; // 水平偏移
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float bearingY; // 垂直偏移
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float advance; // 前进距离
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};
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// ============================================================================
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// 字体图集接口
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// ============================================================================
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class FontAtlas {
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public:
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virtual ~FontAtlas() = default;
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/**
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* @brief 获取字形信息
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* @param codepoint Unicode码点
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* @return 字形信息指针
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*/
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virtual const Glyph *getGlyph(char32_t codepoint) const = 0;
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/**
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* @brief 获取纹理
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* @return 纹理指针
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*/
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virtual class Texture *getTexture() const = 0;
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/**
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* @brief 获取字体大小
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* @return 字体大小（像素）
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*/
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virtual int getFontSize() const = 0;
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/**
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* @brief 获取字体上升高度
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* @return 上升高度
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*/
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virtual float getAscent() const = 0;
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/**
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* @brief 获取字体下降高度
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* @return 下降高度
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*/
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virtual float getDescent() const = 0;
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/**
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* @brief 获取行间距
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* @return 行间距
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*/
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virtual float getLineGap() const = 0;
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/**
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* @brief 获取行高
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* @return 行高
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*/
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virtual float getLineHeight() const = 0;
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/**
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* @brief 计算文字尺寸
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* @param text 要测量的文本
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* @return 文本的宽度和高度
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*/
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virtual Vec2 measureText(const std::string &text) = 0;
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/**
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* @brief 是否支持 SDF 渲染
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* @return 支持SDF返回true
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*/
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virtual bool isSDF() const = 0;
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};
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} // namespace frostbite2D
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