mirror of https://github.com/miguelmota/cointop
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
35 lines
1.2 KiB
Go
35 lines
1.2 KiB
Go
// Copyright 2016 The Go 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 drawer provides functions that help implement screen.Drawer methods.
|
|
package drawer // import "golang.org/x/exp/shiny/driver/internal/drawer"
|
|
|
|
import (
|
|
"image"
|
|
"image/draw"
|
|
|
|
"golang.org/x/exp/shiny/screen"
|
|
"golang.org/x/image/math/f64"
|
|
)
|
|
|
|
// Copy implements the Copy method of the screen.Drawer interface by calling
|
|
// the Draw method of that same interface.
|
|
func Copy(dst screen.Drawer, dp image.Point, src screen.Texture, sr image.Rectangle, op draw.Op, opts *screen.DrawOptions) {
|
|
dst.Draw(f64.Aff3{
|
|
1, 0, float64(dp.X - sr.Min.X),
|
|
0, 1, float64(dp.Y - sr.Min.Y),
|
|
}, src, sr, op, opts)
|
|
}
|
|
|
|
// Scale implements the Scale method of the screen.Drawer interface by calling
|
|
// the Draw method of that same interface.
|
|
func Scale(dst screen.Drawer, dr image.Rectangle, src screen.Texture, sr image.Rectangle, op draw.Op, opts *screen.DrawOptions) {
|
|
rx := float64(dr.Dx()) / float64(sr.Dx())
|
|
ry := float64(dr.Dy()) / float64(sr.Dy())
|
|
dst.Draw(f64.Aff3{
|
|
rx, 0, float64(dr.Min.X) - rx*float64(sr.Min.X),
|
|
0, ry, float64(dr.Min.Y) - ry*float64(sr.Min.Y),
|
|
}, src, sr, op, opts)
|
|
}
|