zorldo

Goofing around with Ebiten
git clone git://bsandro.tech/zorldo
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loadimage.go (2046B)


      1 // Copyright 2014 Hajime Hoshi
      2 //
      3 // Licensed under the Apache License, Version 2.0 (the "License");
      4 // you may not use this file except in compliance with the License.
      5 // You may obtain a copy of the License at
      6 //
      7 //     http://www.apache.org/licenses/LICENSE-2.0
      8 //
      9 // Unless required by applicable law or agreed to in writing, software
     10 // distributed under the License is distributed on an "AS IS" BASIS,
     11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     12 // See the License for the specific language governing permissions and
     13 // limitations under the License.
     14 
     15 //go:build (darwin || freebsd || js || linux || windows) && !android && !ios
     16 // +build darwin freebsd js linux windows
     17 // +build !android
     18 // +build !ios
     19 
     20 package ebitenutil
     21 
     22 import (
     23 	"image"
     24 	"io"
     25 
     26 	"github.com/hajimehoshi/ebiten/v2"
     27 )
     28 
     29 // NewImageFromFile loads the file with path and returns ebiten.Image and image.Image.
     30 //
     31 // Image decoders must be imported when using NewImageFromFile. For example,
     32 // if you want to load a PNG image, you'd need to add `_ "image/png"` to the import section.
     33 //
     34 // How to solve path depends on your environment. This varies on your desktop or web browser.
     35 // Note that this doesn't work on mobiles.
     36 //
     37 // For productions, instead of using NewImageFromFile, it is safer to embed your resources with go:embed.
     38 func NewImageFromFile(path string) (*ebiten.Image, image.Image, error) {
     39 	file, err := OpenFile(path)
     40 	if err != nil {
     41 		return nil, nil, err
     42 	}
     43 	defer func() {
     44 		_ = file.Close()
     45 	}()
     46 	return NewImageFromReader(file)
     47 }
     48 
     49 // NewImageFromReader loads from the io.Reader and returns ebiten.Image and image.Image.
     50 //
     51 // Image decoders must be imported when using NewImageFromReader. For example,
     52 // if you want to load a PNG image, you'd need to add `_ "image/png"` to the import section.
     53 func NewImageFromReader(reader io.Reader) (*ebiten.Image, image.Image, error) {
     54 	img, _, err := image.Decode(reader)
     55 	if err != nil {
     56 		return nil, nil, err
     57 	}
     58 	img2 := ebiten.NewImageFromImage(img)
     59 	return img2, img, err
     60 }