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Removed unnecessary general code.

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This commit is contained in:
Sascha L. Teichmann 2016-05-08 17:33:51 +02:00
parent 792aae99d7
commit 398c52f8a5
3 changed files with 5 additions and 43 deletions
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5
common/basetilecreator.go
View File

@ -5,7 +5,6 @@
package common package common
import ( import (
"image"
"image/color" "image/color"
"io/ioutil" "io/ioutil"
"log" "log"
@ -50,7 +49,7 @@ var tileDepths = [...][2]int16{
var BackgroundColor = color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff} var BackgroundColor = color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff}
type BaseTileUpdateFunc func(x, y int, img image.Image) bool type BaseTileUpdateFunc func(x, y int, hash []byte) bool
type BaseTileCreator struct { type BaseTileCreator struct {
client *RedisClient client *RedisClient
@ -165,7 +164,7 @@ func (btc *BaseTileCreator) CreateTile(x, z int16, i, j int) (bool, error) {
return true, SaveAsPNG(path, image) return true, SaveAsPNG(path, image)
} }
if btc.update(i, j, image) { if btc.update(i, j, SHA1Image(image)) {
log.Printf("Writing (%d, %d) to file %s.\n", x, z, path) log.Printf("Writing (%d, %d) to file %s.\n", x, z, path)
return true, SaveAsPNGAtomic(path, image) return true, SaveAsPNGAtomic(path, image)
} }

4
common/basetilehash.go
View File

@ -6,7 +6,6 @@ package common
import ( import (
"bytes" "bytes"
"image"
"sync" "sync"
) )
@ -20,8 +19,7 @@ func NewBaseTileHash() *BaseTileHash {
return &BaseTileHash{hashes: map[struct{ x, y int }][]byte{}} return &BaseTileHash{hashes: map[struct{ x, y int }][]byte{}}
} }
func (bth *BaseTileHash) Update(x, y int, img image.Image) bool { func (bth *BaseTileHash) Update(x, y int, hash []byte) bool {
hash := SHA1Image(img)
key := struct{ x, y int }{x, y} key := struct{ x, y int }{x, y}
bth.Lock() bth.Lock()
defer bth.Unlock() defer bth.Unlock()

39
common/image.go
View File

@ -112,7 +112,8 @@ func LoadPNG(path string, bg color.RGBA) image.Image {
return img return img
} }
func sha1rgba(img *image.RGBA) []byte { func SHA1Image(img *image.RGBA) []byte {
hash := sha1.New() hash := sha1.New()
w, h := img.Rect.Dx()*4, img.Rect.Dy() w, h := img.Rect.Dx()*4, img.Rect.Dy()
@ -124,39 +125,3 @@ func sha1rgba(img *image.RGBA) []byte {
return hash.Sum(nil) return hash.Sum(nil)
} }
func sha1uniform(img *image.Uniform) []byte {
r, g, b, a := img.C.RGBA()
return sha1.New().Sum([]byte{
byte(r >> 16),
byte(g >> 16),
byte(b >> 16),
byte(a >> 16)})
}
func SHA1Image(img image.Image) []byte {
switch i := img.(type) {
case *image.RGBA:
return sha1rgba(i)
case *image.Uniform:
return sha1uniform(i)
}
log.Println("WARN: slow path for SHA1Image")
hash := sha1.New()
bounds := img.Bounds()
var pix [4]byte
for x := bounds.Min.X; x <= bounds.Max.X; x++ {
for y := bounds.Min.Y; y <= bounds.Max.Y; y++ {
r, g, b, a := img.At(x, y).RGBA()
pix[0] = byte(r >> 16)
pix[1] = byte(g >> 16)
pix[2] = byte(b >> 16)
pix[3] = byte(a >> 16)
hash.Write(pix[:])
}
}
return hash.Sum(nil)
}