mirror of
https://bitbucket.org/s_l_teichmann/mtsatellite
synced 2025-11-04 09:55:34 +01:00
Moved sub baseline tile generation into separate file.
This commit is contained in:
Sascha L. Teichmann
@@ -7,71 +7,12 @@ package main
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import (
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"flag"
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"fmt"
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"image"
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"image/color"
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"image/png"
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"log"
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"net/http"
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"os"
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"path/filepath"
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"strconv"
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"bitbucket.org/s_l_teichmann/mtredisalize/common"
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"github.com/gorilla/mux"
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)
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func blowUp(src image.Image) *image.RGBA {
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// TODO: Fast path for image.RGBA
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dst := image.NewRGBA(image.Rect(0, 0, 256, 256))
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// fix point numbers x:8
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dx, dy := src.Bounds().Dx(), src.Bounds().Dy()
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bx, by := src.Bounds().Min.X<<8, src.Bounds().Min.Y<<8
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py := by
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for y := 0; y < 256; y++ {
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sy := (py >> 8) & 0xff
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ox := -1
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px := bx
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var col color.Color
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for x := 0; x < 256; x++ {
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sx := (px >> 8) & 0xff
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if sx != ox { // Minimize interface indirection access.
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ox = sx
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col = src.At(sx, sy)
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}
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dst.Set(x, y, col)
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px += dx
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}
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py += dy
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}
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return dst
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}
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func toUint(s string) uint {
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var err error
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var x int
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if x, err = strconv.Atoi(s); err != nil {
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log.Printf("WARN: Cannot convert to int: %s", err)
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return 0
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}
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return uint(x)
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}
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func createETag(path string) (etag string, err error) {
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var fi os.FileInfo
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if fi, err = os.Stat(path); err != nil {
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return
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}
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etag = fmt.Sprintf("%x-%x", fi.ModTime().Unix(), fi.Size())
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return
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}
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func main() {
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var (
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port int
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@@ -91,93 +32,10 @@ func main() {
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flag.Parse()
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r := mux.NewRouter()
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r.HandleFunc("/map/{z:[0-9]+}/{x:[0-9]+}/{y:[0-9]+}.png", func(rw http.ResponseWriter, r *http.Request) {
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vars := mux.Vars(r)
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xs := vars["x"]
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ys := vars["y"]
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zs := vars["z"]
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x, y, z := toUint(xs), toUint(ys), toUint(zs)
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if z < 9 {
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filename := fmt.Sprintf("%d/%d/%d.png", z, x, y)
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http.ServeFile(rw, r, filepath.Join(mapDir, filename))
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return
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}
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if z > 16 {
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z = 16
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}
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tx := x >> (z - 8)
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ty := y >> (z - 8)
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baseTile := filepath.Join(mapDir, fmt.Sprintf("8/%d/%d.png", tx, ty))
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var etag string
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var err error
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if ifNoneMatch := r.Header.Get("If-None-Match"); ifNoneMatch != "" {
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if etag, err = createETag(baseTile); err != nil {
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http.NotFound(rw, r)
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return
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}
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if ifNoneMatch == etag {
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http.Error(rw, http.StatusText(http.StatusNotModified), http.StatusNotModified)
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return
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}
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}
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img := common.LoadPNG(baseTile)
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type subImage interface {
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SubImage(image.Rectangle) image.Image
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}
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var si subImage
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var ok bool
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if si, ok = img.(subImage); !ok {
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// Should not happen.
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http.Error(rw,
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http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
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return
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}
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rx := x & ^(^uint(0) << (z - 8))
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ry := y & ^(^uint(0) << (z - 8))
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parts := uint(1) << (z - 8)
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w := uint(256) / parts
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xo := w * rx
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yo := w * (parts - 1 - ry)
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//fmt.Printf("x %d\n", x)
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//fmt.Printf("y %d\n", y)
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//fmt.Printf("z %d\n", z)
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//fmt.Printf("z %d\n", z)
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//fmt.Printf("parts %d\n", parts)
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//fmt.Printf("w %d\n", w)
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//fmt.Printf("xo %d\n", xo)
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//fmt.Printf("yo %d\n", yo)
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//fmt.Printf("rx %d\n", rx)
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//fmt.Printf("ry %d\n", ry)
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img = si.SubImage(image.Rect(int(xo), int(yo), int(xo+w), int(yo+w)))
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img = blowUp(img)
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rw.Header().Set("Content-Type", "image/png")
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if etag == "" {
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if etag, err = createETag(baseTile); err != nil {
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log.Printf("Cannot create ETag: %s", baseTile)
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} else {
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rw.Header().Set("ETag", etag)
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}
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} else {
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rw.Header().Set("ETag", etag)
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}
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if err = png.Encode(rw, img); err != nil {
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log.Printf("WARN: encoding image failed: %s", err)
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return
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}
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})
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r.HandleFunc("/map/{z:[0-9]+}/{x:[0-9]+}/{y:[0-9]+}.png",
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func(rw http.ResponseWriter, r *http.Request) {
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createTiles(rw, r, mapDir)
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})
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r.PathPrefix("/").Handler(http.FileServer(http.Dir(webDir)))
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http.Handle("/", r)
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158
cmd/mtwebmapper/subbaseline.go
Normal file
158
cmd/mtwebmapper/subbaseline.go
Normal file
@@ -0,0 +1,158 @@
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// Copyright 2014 by Sascha L. Teichmann
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// Use of this source code is governed by the MIT license
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// that can be found in the LICENSE file.
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package main
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import (
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"fmt"
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"image"
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"image/color"
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"image/png"
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"log"
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"net/http"
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"os"
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"path/filepath"
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"strconv"
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"bitbucket.org/s_l_teichmann/mtredisalize/common"
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"github.com/gorilla/mux"
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)
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func blowUp(src image.Image) *image.RGBA {
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// TODO: Fast path for image.RGBA
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dst := image.NewRGBA(image.Rect(0, 0, 256, 256))
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// fix point numbers x:8
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dx, dy := src.Bounds().Dx(), src.Bounds().Dy()
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bx, by := src.Bounds().Min.X<<8, src.Bounds().Min.Y<<8
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py := by
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for y := 0; y < 256; y++ {
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sy := (py >> 8) & 0xff
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ox := -1
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px := bx
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var col color.Color
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for x := 0; x < 256; x++ {
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sx := (px >> 8) & 0xff
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if sx != ox { // Minimize interface indirection access.
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ox = sx
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col = src.At(sx, sy)
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}
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dst.Set(x, y, col)
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px += dx
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}
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py += dy
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}
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return dst
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}
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func createTiles(rw http.ResponseWriter, r *http.Request, mapDir string) {
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vars := mux.Vars(r)
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xs := vars["x"]
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ys := vars["y"]
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zs := vars["z"]
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x, y, z := toUint(xs), toUint(ys), toUint(zs)
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if z < 9 {
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filename := fmt.Sprintf("%d/%d/%d.png", z, x, y)
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http.ServeFile(rw, r, filepath.Join(mapDir, filename))
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return
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}
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if z > 16 {
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z = 16
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}
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tx := x >> (z - 8)
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ty := y >> (z - 8)
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baseTile := filepath.Join(mapDir, fmt.Sprintf("8/%d/%d.png", tx, ty))
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var etag string
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var err error
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if ifNoneMatch := r.Header.Get("If-None-Match"); ifNoneMatch != "" {
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if etag, err = createETag(baseTile); err != nil {
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http.NotFound(rw, r)
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return
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}
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if ifNoneMatch == etag {
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http.Error(rw, http.StatusText(http.StatusNotModified), http.StatusNotModified)
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return
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}
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}
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img := common.LoadPNG(baseTile)
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type subImage interface {
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SubImage(image.Rectangle) image.Image
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}
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var si subImage
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var ok bool
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if si, ok = img.(subImage); !ok {
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// Should not happen.
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http.Error(rw,
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http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
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return
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}
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rx := x & ^(^uint(0) << (z - 8))
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ry := y & ^(^uint(0) << (z - 8))
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parts := uint(1) << (z - 8)
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w := uint(256) / parts
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xo := w * rx
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yo := w * (parts - 1 - ry)
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//fmt.Printf("x %d\n", x)
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//fmt.Printf("y %d\n", y)
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//fmt.Printf("z %d\n", z)
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//fmt.Printf("z %d\n", z)
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//fmt.Printf("parts %d\n", parts)
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//fmt.Printf("w %d\n", w)
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//fmt.Printf("xo %d\n", xo)
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//fmt.Printf("yo %d\n", yo)
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//fmt.Printf("rx %d\n", rx)
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//fmt.Printf("ry %d\n", ry)
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img = si.SubImage(image.Rect(int(xo), int(yo), int(xo+w), int(yo+w)))
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img = blowUp(img)
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rw.Header().Set("Content-Type", "image/png")
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if etag == "" {
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if etag, err = createETag(baseTile); err != nil {
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log.Printf("Cannot create ETag: %s", baseTile)
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} else {
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rw.Header().Set("ETag", etag)
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}
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} else {
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rw.Header().Set("ETag", etag)
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}
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if err = png.Encode(rw, img); err != nil {
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log.Printf("WARN: encoding image failed: %s", err)
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return
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}
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}
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func createETag(path string) (etag string, err error) {
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var fi os.FileInfo
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if fi, err = os.Stat(path); err != nil {
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return
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}
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etag = fmt.Sprintf("%x-%x", fi.ModTime().Unix(), fi.Size())
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return
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}
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func toUint(s string) uint {
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var err error
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var x int
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if x, err = strconv.Atoi(s); err != nil {
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log.Printf("WARN: Cannot convert to int: %s", err)
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return 0
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}
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return uint(x)
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}
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