fixed dependencies

vendor/github.com/go-latex/latex/tex/state.go

@@ -0,0 +1,25 @@
+// 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 tex
+
+import (
+	"github.com/go-latex/latex/font"
+)
+
+type State struct {
+	be   font.Backend
+	Font font.Font
+	DPI  float64
+}
+
+func NewState(be font.Backend, font font.Font, dpi float64) State {
+	return State{
+		be:   be,
+		Font: font,
+		DPI:  dpi,
+	}
+}
+
+func (state State) Backend() font.Backend { return state.be }

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

@@ -0,0 +1,30 @@
+// 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 tex provides a TeX-like box model.
+//
+// The following is based directly on the document 'woven' from the
+// TeX82 source code.  This information is also available in printed
+// form:
+//
+//    Knuth, Donald E.. 1986.  Computers and Typesetting, Volume B:
+//    TeX: The Program.  Addison-Wesley Professional.
+//
+// An electronic version is also available from:
+//
+//    http://brokestream.com/tex.pdf
+//
+// The most relevant "chapters" are:
+//    Data structures for boxes and their friends
+//    Shipping pages out (Ship class)
+//    Packaging (hpack and vpack)
+//    Data structures for math mode
+//    Subroutines for math mode
+//    Typesetting math formulas
+//
+// Many of the docstrings below refer to a numbered "node" in that
+// book, e.g., node123
+//
+// Note that (as TeX) y increases downward.
+package tex // import "github.com/go-latex/latex/tex"

vendor/github.com/go-latex/latex/tex/utils.go

@@ -0,0 +1,26 @@
+// 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 tex
+
+func maxInt(a, b int) int {
+	if a > b {
+		return a
+	}
+	return b
+}
+
+func clamp(v float64) float64 {
+	const (
+		min = -1000000000.
+		max = +1000000000.
+	)
+	switch {
+	case v < min:
+		return min
+	case v > max:
+		return max
+	}
+	return v
+}