From e97a0b3e3760d68d3ce9c29b8e6457cd113b6c5e Mon Sep 17 00:00:00 2001
From: Hajime Hoshi <hajimehoshi@gmail.com>
Date: Wed, 3 May 2017 02:51:38 +0900
Subject: [PATCH] Revert "grahics: Remove unneeded 'if' branches"

This reverts commit aa8e77e0bf0c0016ef59ec67ce36a7a18d5b0068.
---
 vertices_js.go    | 6 ++++++
 vertices_notjs.go | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/vertices_js.go b/vertices_js.go
index 5dd3e6b97..7b37a2f04 100644
--- a/vertices_js.go
+++ b/vertices_js.go
@@ -46,7 +46,13 @@ func vertices(parts ImageParts, width, height int, geo *affine.GeoM) []float32 {
 	n := 0
 	for i := 0; i < l; i++ {
 		dx0, dy0, dx1, dy1 := parts.Dst(i)
+		if dx0 == dx1 || dy0 == dy1 {
+			continue
+		}
 		sx0, sy0, sx1, sy1 := parts.Src(i)
+		if sx0 == sx1 || sy0 == sy1 {
+			continue
+		}
 		u0, v0, u1, v1 := float64(sx0)/wf, float64(sy0)/hf, float64(sx1)/wf, float64(sy1)/hf
 		// Adjust texels to fix a problem that outside texels are used (#317).
 		u1 -= 1.0 / wf / texelAdjustment
diff --git a/vertices_notjs.go b/vertices_notjs.go
index 5134b446e..2524bb9e6 100644
--- a/vertices_notjs.go
+++ b/vertices_notjs.go
@@ -44,8 +44,14 @@ func vertices(parts ImageParts, width, height int, geo *affine.GeoM) []float32 {
 	n := 0
 	for i := 0; i < l; i++ {
 		dx0, dy0, dx1, dy1 := parts.Dst(i)
+		if dx0 == dx1 || dy0 == dy1 {
+			continue
+		}
 		x0, y0, x1, y1 := float32(dx0), float32(dy0), float32(dx1), float32(dy1)
 		sx0, sy0, sx1, sy1 := parts.Src(i)
+		if sx0 == sx1 || sy0 == sy1 {
+			continue
+		}
 		u0, v0, u1, v1 := float32(sx0)/wf, float32(sy0)/hf, float32(sx1)/wf, float32(sy1)/hf
 		// Adjust texels to fix a problem that outside texels are used (#317).
 		u1 -= 1.0 / wf / texelAdjustment