From 0850b690288f67e7e15ce80c56553369a15d2ec1 Mon Sep 17 00:00:00 2001
From: "Sascha L. Teichmann" <sascha.teichmann@intevation.de>
Date: Sun, 14 Sep 2014 23:10:54 +0200
Subject: [PATCH] Fixed tile fusing.

---
 cmd/mtseeder/pyramid.go | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/cmd/mtseeder/pyramid.go b/cmd/mtseeder/pyramid.go
index 111f339..8e62860 100644
--- a/cmd/mtseeder/pyramid.go
+++ b/cmd/mtseeder/pyramid.go
@@ -151,21 +151,22 @@ func loadImage(path string) image.Image {
 	return img
 }
 
-func fuseTile(scratch *image.RGBA, job *pyramidJob) (err error) {
+var dps = [4]image.Point{
+	image.Pt(0, 256),
+	image.Pt(0, 0),
+	image.Pt(256, 256),
+	image.Pt(256, 0)}
 
-	var ofs = [4][2]int{
-		{0, 0},
-		{0, 256},
-		{256, 0},
-		{256, 256}}
+func fuseTile(scratch *image.RGBA, job *pyramidJob) (err error) {
 
 	for i, path := range job.src {
 
 		img := loadImage(path)
 
-		draw.Draw(scratch,
-			image.Rect(ofs[i][0], ofs[i][1], 256, 256),
-			img, image.ZP, draw.Src)
+		sr := img.Bounds()
+		r := sr.Sub(sr.Min).Add(dps[i])
+
+		draw.Draw(scratch, r, img, sr.Min, draw.Src)
 	}
 
 	resized := resize.Resize(256, 256, scratch, resize.Bicubic)
@@ -184,7 +185,6 @@ func fuseTile(scratch *image.RGBA, job *pyramidJob) (err error) {
 
 	out.Flush()
 	err = outFile.Close()
-
 	return
 }