From 8e1359b45d16ff14e44f013417cc7bf9c8ce4933 Mon Sep 17 00:00:00 2001
From: faiface <faiface@ksp.sk>
Date: Sun, 22 Jan 2017 02:49:45 +0100
Subject: [PATCH] flip image in Picture to make it correct
---
picture.go | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/picture.go b/picture.go
index ef17326..b1daa77 100644
--- a/picture.go
+++ b/picture.go
@@ -25,6 +25,16 @@ func NewPicture(img image.Image, smooth bool) *Picture {
nrgba := image.NewNRGBA(image.Rect(0, 0, bounds.Dx(), bounds.Dy()))
draw.Draw(nrgba, nrgba.Bounds(), img, bounds.Min, draw.Src)
+ // flip the image vertically
+ tmp := make([]byte, nrgba.Stride)
+ for i, j := 0, bounds.Dy()-1; i < j; i, j = i+1, j-1 {
+ iSlice := nrgba.Pix[i*nrgba.Stride : (i+1)*nrgba.Stride]
+ jSlice := nrgba.Pix[j*nrgba.Stride : (j+1)*nrgba.Stride]
+ copy(tmp, iSlice)
+ copy(iSlice, jSlice)
+ copy(jSlice, tmp)
+ }
+
var texture *pixelgl.Texture
mainthread.Call(func() {
texture = pixelgl.NewTexture(
--
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