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https://bitbucket.org/s_l_teichmann/mtsatellite
synced 2024-12-23 08:40:18 +01:00
Pulled over empty tile caching from coverage-exp branch.
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@ -9,7 +9,7 @@ on YouTube.
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A live map of an online world can be viewed [here](http://maps.mt.sha-bang.de/).
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A live map of an online world can be viewed [here](http://maps.mt.sha-bang.de/).
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See [COMPILE](https://bitbucket.org/s_l_teichmann/mtsatellite/src/default/COMPILE.md) how to compile
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See [COMPILE](https://bitbucket.org/s_l_teichmann/mtsatellite/src/default/COMPILE.md) how to compile
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MTSatellite. Essentially you need Go 1.3 (or higher) and a GNU/Linux system.
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MTSatellite. Essentially you need Go 1.4 (or higher) and a GNU/Linux system.
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See [SETUP](https://bitbucket.org/s_l_teichmann/mtsatellite/src/default/SETUP.md) how to bring
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See [SETUP](https://bitbucket.org/s_l_teichmann/mtsatellite/src/default/SETUP.md) how to bring
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MTSatellite to life.
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MTSatellite to life.
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@ -39,4 +39,4 @@ the map has to be pre-rendered with **mtseeder**.
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This is Free Software under the terms of the MIT license.
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This is Free Software under the terms of the MIT license.
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See [LICENSE](LICENSE) file for details.
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See [LICENSE](LICENSE) file for details.
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(c) 2014 by Sascha L. Teichmann
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(c) 2014 by Sascha L. Teichmann
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@ -6,6 +6,7 @@ package common
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import (
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import (
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"image/color"
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"image/color"
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"io/ioutil"
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"log"
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"log"
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"path/filepath"
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"path/filepath"
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"strconv"
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"strconv"
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@ -41,13 +42,16 @@ var tileDepths = [...][2]int16{
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{-1024, -257},
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{-1024, -257},
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{-1934, -1025}}
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{-1934, -1025}}
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var BackgroundColor = color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff}
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type BaseTileCreator struct {
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type BaseTileCreator struct {
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client *RedisClient
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client *RedisClient
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colors *Colors
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colors *Colors
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renderer *Renderer
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renderer *Renderer
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yOrder *YOrder
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yOrder *YOrder
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baseDir string
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baseDir string
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update bool
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update bool
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emptyImage []byte
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}
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}
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func NewBaseTileCreator(
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func NewBaseTileCreator(
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@ -116,11 +120,25 @@ func (btc *BaseTileCreator) CreateTile(x, z int16, i, j int) error {
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oareas, nareas = nareas, oareas[0:0]
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oareas, nareas = nareas, oareas[0:0]
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}
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}
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path := filepath.Join(btc.baseDir, strconv.Itoa(i), strconv.Itoa(j)+".png")
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// Empty images are likely to be produced during seeding.
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if !btc.update && btc.renderer.IsEmpty() {
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// To avoid redundant encoding cache the resulting empty image.
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if btc.emptyImage == nil {
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var err error
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m := BackgroundImage((tileWidth-2)*16, (tileHeight-2)*16, BackgroundColor)
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if btc.emptyImage, err = EncodeToMem(m); err != nil {
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return err
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}
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}
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log.Printf("Writing empty (%d, %d) to file %s\n", x, z, path)
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return ioutil.WriteFile(path, btc.emptyImage, 0666)
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}
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image := btc.renderer.CreateShadedImage(
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image := btc.renderer.CreateShadedImage(
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16, 16, (tileWidth-2)*16, (tileHeight-2)*16,
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16, 16, (tileWidth-2)*16, (tileHeight-2)*16,
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btc.colors, color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff})
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btc.colors, BackgroundColor)
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path := filepath.Join(btc.baseDir, strconv.Itoa(i), strconv.Itoa(j)+".png")
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log.Printf("Writing (%d, %d) to file %s\n", x, z, path)
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log.Printf("Writing (%d, %d) to file %s\n", x, z, path)
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@ -6,6 +6,7 @@ package common
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import (
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import (
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"bufio"
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"bufio"
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"bytes"
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"errors"
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"errors"
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"image"
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"image"
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"image/png"
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"image/png"
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@ -35,6 +36,15 @@ func nextSuffix() string {
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return strconv.Itoa(int(1e9 + r%1e9))[1:]
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return strconv.Itoa(int(1e9 + r%1e9))[1:]
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}
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}
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func EncodeToMem(img image.Image) ([]byte, error) {
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var buf bytes.Buffer
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enc := png.Encoder{png.BestCompression}
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if err := enc.Encode(&buf, img); err != nil {
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return nil, err
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}
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return buf.Bytes(), nil
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}
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func SaveAsPNG(path string, img image.Image) (err error) {
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func SaveAsPNG(path string, img image.Image) (err error) {
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var file *os.File
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var file *os.File
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if file, err = os.Create(path); err != nil {
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if file, err = os.Create(path); err != nil {
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@ -8,6 +8,7 @@ import (
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"container/heap"
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"container/heap"
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"image"
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"image"
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"image/color"
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"image/color"
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"image/draw"
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"math"
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"math"
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)
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)
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@ -195,6 +196,10 @@ func (r *Renderer) IsFilled() bool {
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return true
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return true
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}
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}
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func (r *Renderer) IsEmpty() bool {
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return r.SolidBlocks == 0 && r.TransparentBlocks == 0
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}
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func (r *Renderer) RenderBlock(block *Block, colors *Colors) (err error) {
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func (r *Renderer) RenderBlock(block *Block, colors *Colors) (err error) {
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bx := block.Coord.X - r.xOfs
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bx := block.Coord.X - r.xOfs
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@ -406,6 +411,12 @@ func safeColor(x int32) uint8 {
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}
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}
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}
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}
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func BackgroundImage(width, height int, bg color.RGBA) *image.RGBA {
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m := image.NewRGBA(image.Rect(0, 0, width, height))
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draw.Draw(m, m.Bounds(), &image.Uniform{bg}, image.ZP, draw.Src)
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return m
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}
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func (r *Renderer) CreateShadedImage(
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func (r *Renderer) CreateShadedImage(
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xOfs, zOfs, width, height int,
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xOfs, zOfs, width, height int,
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cols *Colors, background color.RGBA) *image.RGBA {
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cols *Colors, background color.RGBA) *image.RGBA {
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