package wallpaper // The methods that deal in cached Textures for Doodle. import ( "errors" "fmt" "image" "os" "git.kirsle.net/apps/doodle/lib/render" "git.kirsle.net/apps/doodle/pkg/userdir" "golang.org/x/image/bmp" ) // CornerTexture returns the Texture. func (wp *Wallpaper) CornerTexture(e render.Engine) (render.Texturer, error) { if !wp.ready { return nil, errors.New("wallpaper not ready") } if wp.tex.corner == nil { tex, err := texture(e, wp.corner, wp.Name+"c") wp.tex.corner = tex return tex, err } return wp.tex.corner, nil } // TopTexture returns the Texture. func (wp *Wallpaper) TopTexture(e render.Engine) (render.Texturer, error) { if wp.tex.top == nil { tex, err := texture(e, wp.top, wp.Name+"t") wp.tex.top = tex return tex, err } return wp.tex.top, nil } // LeftTexture returns the Texture. func (wp *Wallpaper) LeftTexture(e render.Engine) (render.Texturer, error) { if wp.tex.left == nil { tex, err := texture(e, wp.left, wp.Name+"l") wp.tex.left = tex return tex, err } return wp.tex.left, nil } // RepeatTexture returns the Texture. func (wp *Wallpaper) RepeatTexture(e render.Engine) (render.Texturer, error) { if wp.tex.repeat == nil { tex, err := texture(e, wp.repeat, wp.Name+"x") wp.tex.repeat = tex return tex, err } return wp.tex.repeat, nil } func texture(e render.Engine, img *image.RGBA, name string) (render.Texturer, error) { filename := userdir.CacheFilename("wallpaper", name+".bmp") if _, err := os.Stat(filename); os.IsNotExist(err) { fh, err := os.Create(filename) if err != nil { return nil, fmt.Errorf("texture(%s): %s", name, err.Error()) } err = bmp.Encode(fh, img) if err != nil { return nil, fmt.Errorf("texture(%s): bmp.Encode: %s", name, err.Error()) } err = fh.Close() if err != nil { return nil, fmt.Errorf("texture(%s): fh.Close: %s", name, err.Error()) } } texture, err := e.NewBitmap(filename) if err != nil { return nil, fmt.Errorf("CornerTexture: NewBitmap(%s): %s", filename, err.Error()) } return texture, nil }