ebiten/internal/graphicscommand/image_notjs.go

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// Copyright 2022 The Ebitengine Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//go:build !js
// +build !js
package graphicscommand
import (
"errors"
"fmt"
"image"
"os"
"path/filepath"
"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver"
)
func (i *Image) Dump(graphicsDriver graphicsdriver.Graphics, path string, blackbg bool, rect image.Rectangle) (string, error) {
p, err := availableFilename(path)
if err != nil {
return "", err
}
path = p
path = i.dumpName(path)
f, err := os.Create(path)
if err != nil {
return "", err
}
defer func() {
_ = f.Close()
}()
if err := i.dumpTo(f, graphicsDriver, blackbg, rect); err != nil {
return "", err
}
return path, nil
}
// DumpImages dumps all the current images to the specified directory.
//
// This is for testing usage.
func DumpImages(images []*Image, graphicsDriver graphicsdriver.Graphics, dir string) (string, error) {
d, err := availableFilename(dir)
if err != nil {
return "", err
}
dir = d
if err := os.Mkdir(dir, 0755); err != nil {
return "", err
}
for _, img := range images {
// Screen image cannot be dumped.
if img.screen {
continue
}
f, err := os.Create(filepath.Join(dir, img.dumpName("*.png")))
if err != nil {
return "", err
}
defer func() {
_ = f.Close()
}()
if err := img.dumpTo(f, graphicsDriver, false, image.Rect(0, 0, img.width, img.height)); err != nil {
return "", err
}
}
return dir, nil
}
// availableFilename returns a filename that is valid as a new file or directory.
func availableFilename(name string) (string, error) {
ext := filepath.Ext(name)
base := name[:len(name)-len(ext)]
for i := 1; ; i++ {
if _, err := os.Stat(name); err != nil {
if errors.Is(err, os.ErrNotExist) {
break
}
return "", err
}
name = fmt.Sprintf("%s_%d%s", base, i, ext)
}
return name, nil
}