mirror of
https://github.com/hajimehoshi/ebiten.git
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61 lines
1.6 KiB
Go
61 lines
1.6 KiB
Go
// Copyright 2021 The Ebiten Authors
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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 main
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import (
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"bytes"
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"image"
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_ "image/png"
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"github.com/hajimehoshi/ebiten/v2"
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"github.com/hajimehoshi/ebiten/v2/examples/resources/images"
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)
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// SpriteSheet represents a collection of sprite images.
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type SpriteSheet struct {
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Floor *ebiten.Image
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Wall *ebiten.Image
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Statue *ebiten.Image
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Tube *ebiten.Image
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Crown *ebiten.Image
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Portal *ebiten.Image
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}
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// LoadSpriteSheet loads the embedded SpriteSheet.
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func LoadSpriteSheet(tileSize int) (*SpriteSheet, error) {
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img, _, err := image.Decode(bytes.NewReader(images.Spritesheet_png))
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if err != nil {
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return nil, err
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}
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sheet := ebiten.NewImageFromImage(img)
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// spriteAt returns a sprite at the provided coordinates.
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spriteAt := func(x, y int) *ebiten.Image {
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return sheet.SubImage(image.Rect(x*tileSize, (y+1)*tileSize, (x+1)*tileSize, y*tileSize)).(*ebiten.Image)
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}
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// Populate SpriteSheet.
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s := &SpriteSheet{}
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s.Floor = spriteAt(10, 4)
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s.Wall = spriteAt(2, 3)
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s.Statue = spriteAt(5, 4)
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s.Tube = spriteAt(3, 4)
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s.Crown = spriteAt(8, 6)
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s.Portal = spriteAt(5, 6)
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return s, nil
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}
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