mirror of
https://github.com/hajimehoshi/ebiten.git
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98 lines
2.0 KiB
Go
98 lines
2.0 KiB
Go
// Copyright 2015 Hajime Hoshi
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package ebiten
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import (
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"image/color"
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)
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// A Lines represents the set of lines.
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type Lines interface {
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Len() int
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Points(i int) (x0, y0, x1, y1 float64)
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Color(i int) color.Color
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}
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type line struct {
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x0, y0 float64
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x1, y1 float64
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color color.Color
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}
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func (l *line) Len() int {
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return 1
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}
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func (l *line) Points(i int) (x0, y0, x1, y1 float64) {
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return l.x0, l.y0, l.x1, l.y1
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}
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func (l *line) Color(i int) color.Color {
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return l.color
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}
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type rectsAsLines struct {
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Rects
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}
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func (r *rectsAsLines) Len() int {
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return r.Rects.Len() * 4
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}
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func (r *rectsAsLines) Points(i int) (x0, y0, x1, y1 float64) {
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ix, iy, iw, ih := r.Rects.Rect(i / 4)
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x, y, w, h := float64(ix), float64(iy), float64(iw), float64(ih)
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switch i % 4 {
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case 0:
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return x, y, x + w, y
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case 1:
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return x, y + 1, x, y + h - 1
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case 2:
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return x, y + h - 1, x + w, y + h - 1
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case 3:
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return x + w - 1, y + 1, x + w - 1, y + h - 1
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}
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panic("not reach")
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}
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func (r *rectsAsLines) Color(i int) color.Color {
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return r.Rects.Color(i / 4)
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}
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// A Rects represents the set of rectangles.
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type Rects interface {
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Len() int
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Rect(i int) (x, y, width, height int)
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Color(i int) color.Color
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}
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type rect struct {
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x, y int
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width, height int
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color color.Color
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}
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func (r *rect) Len() int {
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return 1
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}
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func (r *rect) Rect(i int) (x, y, width, height int) {
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return r.x, r.y, r.width, r.height
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}
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func (r *rect) Color(i int) color.Color {
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return r.color
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}
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