From 32a2350965ee3d89e1425569ecd271fdcf22f7a1 Mon Sep 17 00:00:00 2001
From: Alexander Kiryukhin <a.kiryukhin@mail.ru>
Date: Mon, 17 Aug 2020 13:23:27 +0300
Subject: initial

---
 map.go | 88 ------------------------------------------------------------------
 1 file changed, 88 deletions(-)
 delete mode 100644 map.go

(limited to 'map.go')

diff --git a/map.go b/map.go
deleted file mode 100644
index baa9356..0000000
--- a/map.go
+++ /dev/null
@@ -1,88 +0,0 @@
-/*
-Copyright © 2020 Alexander Kiryukhin <ak@bytechain.ru>
-This file is part of OsmStatic project.
-*/
-package main
-
-import (
-	"bytes"
-	"fmt"
-	"image"
-	"image/color"
-	"image/png"
-	_ "image/png"
-	"io/ioutil"
-	"log"
-	"math"
-	"net/http"
-	"sync"
-
-	"github.com/disintegration/imaging"
-)
-
-const (
-	tileAddr = `https://a.tile.openstreetmap.org/%d/%d/%d.png`
-	tw       = 256
-	th       = 256
-)
-
-func GetMapImage(lat, lon float64, zoom, width, height int) ([]byte, error) {
-	x, y, dx, dy := getCoords(lat, lon, zoom)
-	dst := imaging.New(width, height, color.NRGBA{0, 255, 0, 255})
-	wg := sync.WaitGroup{}
-	mu := sync.Mutex{}
-	cx := width/2 - tw/2
-	cy := height/2 - th/2
-	sx := width/tw + 2
-	sy := height/th + 2
-	di := int(dx*float64(tw)) - tw/2
-	dj := int(dy*float64(th)) - th/2
-	for i := -sx / 2; i <= sx/2; i++ {
-		for j := -sy / 2; j <= sy/2; j++ {
-			wg.Add(1)
-			go func(i, j int) {
-				defer wg.Done()
-				tile, err := getTile(x+i, y+j, zoom)
-				if err != nil {
-					log.Println(err)
-					return
-				}
-				img, err := png.Decode(bytes.NewReader(tile))
-				if err != nil {
-					log.Println(err)
-					return
-				}
-				mu.Lock()
-				defer mu.Unlock()
-				tx := cx + i*tw - di
-				ty := cy + j*th - dj
-				dst = imaging.Paste(dst, img, image.Pt(tx, ty))
-			}(int(i), int(j))
-		}
-	}
-	wg.Wait()
-
-	out := bytes.NewBuffer([]byte{})
-	if err := imaging.Encode(out, dst, imaging.PNG); err != nil {
-		return nil, err
-	}
-	return out.Bytes(), nil
-}
-
-func getCoords(lat, lon float64, zoom int) (int, int, float64, float64) {
-	x := (lon + 180.0) / 360.0 * (math.Exp2(float64(zoom)))
-	y := (1.0 - math.Log(math.Tan(lat*math.Pi/180.0)+1.0/math.Cos(lat*math.Pi/180.0))/math.Pi) / 2.0 * (math.Exp2(float64(zoom)))
-	dx := x - math.Floor(x)
-	dy := y - math.Floor(y)
-	return int(math.Floor(x)), int(math.Floor(y)), dx, dy
-}
-
-func getTile(x, y, z int) ([]byte, error) {
-	tile := fmt.Sprintf(tileAddr, z, x, y)
-	resp, err := http.DefaultClient.Get(tile)
-	if err != nil {
-		return nil, err
-	}
-	defer resp.Body.Close()
-	return ioutil.ReadAll(resp.Body)
-}
-- 
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