doodle/pkg/wallpaper/texture.go
Noah Petherbridge 2b42a072a0 Code Layout Refactor
* All private Doodle source code into the pkg/ folder.
* Potentially public code into the lib/ folder.
* Centralize the logger into a subpackage.
2019-04-09 17:35:44 -07:00

81 lines
2.0 KiB
Go

package wallpaper
// The methods that deal in cached Textures for Doodle.
import (
"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) {
fmt.Println("CornerTex")
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
}