fixed dependencies

vendor/github.com/go-latex/latex/font/font.go

@@ -0,0 +1,52 @@
+// Copyright ©2020 The go-latex Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package font holds types to handle and abstract away font management.
+package font
+
+// Font represents a font.
+type Font struct {
+	Name string  // Name is the LaTeX name of the font (regular, default, it, ...)
+	Type string  // Type is the LaTeX class of the font (it, rm, ...)
+	Size float64 // Size is the font size in points.
+}
+
+// Backend is the interface that allows to render math expressions.
+type Backend interface {
+	// RenderGlyphs renders the glyph g at the reference point (x,y).
+	RenderGlyph(x, y float64, font Font, symbol string, dpi float64)
+
+	// RenderRectFilled draws a filled black rectangle from (x1,y1) to (x2,y2).
+	RenderRectFilled(x1, y1, x2, y2 float64)
+
+	// Kern returns the kerning distance between two symbols.
+	Kern(ft1 Font, sym1 string, ft2 Font, sym2 string, dpi float64) float64
+
+	// Metrics returns the metrics.
+	Metrics(symbol string, font Font, dpi float64, math bool) Metrics
+
+	// XHeight returns the xheight for the given font and dpi.
+	XHeight(font Font, dpi float64) float64
+
+	// UnderlineThickness returns the line thickness that matches the given font.
+	// It is used as a base unit for drawing lines such as in a fraction or radical.
+	UnderlineThickness(font Font, dpi float64) float64
+}
+
+// Metrics represents the metrics of a glyph in a given font.
+type Metrics struct {
+	Advance float64 // Advance distance of the glyph, in points.
+	Height  float64 // Height of the glyph in points.
+	Width   float64 // Width of the glyph in points.
+
+	// Ink rectangle of the glyph.
+	XMin, XMax, YMin, YMax float64
+
+	// Iceberg is the distance from the baseline to the top of the glyph.
+	// Iceberg corresponds to TeX's definition of "height".
+	Iceberg float64
+
+	// Slanted indicates whether the glyph is slanted.
+	Slanted bool
+}