63 lines
1.1 KiB
Go
63 lines
1.1 KiB
Go
// Copyright ©2020 The go-latex Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Package drawtex describes the graphics interface for drawing LaTeX.
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package drawtex // import "github.com/go-latex/latex/drawtex"
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import (
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"github.com/go-latex/latex/font"
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"golang.org/x/image/font/sfnt"
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)
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type Canvas struct {
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ops []Op
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}
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func New() *Canvas {
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return &Canvas{}
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}
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func (c *Canvas) RenderGlyph(x, y float64, infos Glyph) {
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c.ops = append(c.ops, GlyphOp{x, y, infos})
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}
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func (c *Canvas) RenderRectFilled(x1, y1, x2, y2 float64) {
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c.ops = append(c.ops, RectOp{x1, y1, x2, y2})
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}
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func (c *Canvas) Ops() []Op { return c.ops }
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type Op interface {
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isOp()
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}
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type GlyphOp struct {
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X, Y float64
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Glyph Glyph
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}
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func (GlyphOp) isOp() {}
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type RectOp struct {
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X1, Y1 float64
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X2, Y2 float64
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}
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func (RectOp) isOp() {}
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type Glyph struct {
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Font *sfnt.Font
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Size float64
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Postscript string
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Metrics font.Metrics
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Symbol string
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Num sfnt.GlyphIndex
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Offset float64
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}
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var (
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_ Op = (*GlyphOp)(nil)
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_ Op = (*RectOp)(nil)
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)
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