107 lines
2.4 KiB
Go
107 lines
2.4 KiB
Go
package wallpaper
|
|
|
|
// The methods that deal in cached Textures for Doodle.
|
|
|
|
import (
|
|
"errors"
|
|
"image"
|
|
|
|
"git.kirsle.net/SketchyMaze/doodle/pkg/shmem"
|
|
"git.kirsle.net/SketchyMaze/doodle/pkg/userdir"
|
|
"git.kirsle.net/go/render"
|
|
)
|
|
|
|
/*
|
|
Free all SDL2 textures from memory.
|
|
|
|
The Canvas widget will free wallpaper textures in its Destroy method. Note that
|
|
if the wallpaper was still somehow in use, the textures will be regenerated the
|
|
next time a method like CornerTexture() asks for one.
|
|
|
|
Returns the number of textures freed (up to 4) or -1 if wallpaper was not ready.
|
|
*/
|
|
func (wp *Wallpaper) Free() int {
|
|
if !wp.ready {
|
|
return -1
|
|
}
|
|
|
|
var freed int
|
|
|
|
if wp.tex.corner != nil {
|
|
wp.tex.corner.Free()
|
|
wp.tex.corner = nil
|
|
freed++
|
|
}
|
|
|
|
if wp.tex.top != nil {
|
|
wp.tex.top.Free()
|
|
wp.tex.top = nil
|
|
freed++
|
|
}
|
|
|
|
if wp.tex.left != nil {
|
|
wp.tex.left.Free()
|
|
wp.tex.left = nil
|
|
freed++
|
|
}
|
|
|
|
if wp.tex.repeat != nil {
|
|
wp.tex.repeat.Free()
|
|
wp.tex.repeat = nil
|
|
freed++
|
|
}
|
|
|
|
return freed
|
|
}
|
|
|
|
// 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
|
|
}
|
|
|
|
// texture creates or returns a cached texture for a wallpaper.
|
|
func texture(e render.Engine, img *image.RGBA, name string) (render.Texturer, error) {
|
|
filename := userdir.CacheFilename("wallpaper", name+".bmp")
|
|
texture, err := shmem.CurrentRenderEngine.StoreTexture(filename, img)
|
|
return texture, err
|
|
}
|