From 11cf7a9251ae51e0a689dcb70980e635845a99cd Mon Sep 17 00:00:00 2001
From: Marvin Blum <marvin@marvinblum.de>
Date: Fri, 6 May 2016 17:38:32 +0200
Subject: [PATCH] Added function to easily access loaded textures.

---
 ToDo.md               |  1 +
 demo/sprite/sprite.go | 13 +++++++------
 res_util.go           | 23 +++++++++++++++++++++++
 3 files changed, 31 insertions(+), 6 deletions(-)
 create mode 100644 res_util.go

diff --git a/ToDo.md b/ToDo.md
index 46558b9..e5cb454 100644
--- a/ToDo.md
+++ b/ToDo.md
@@ -4,3 +4,4 @@
 * more logging
 * limit FPS
 * fullscreen
+* simple access to default resources like GetTex()
diff --git a/demo/sprite/sprite.go b/demo/sprite/sprite.go
index a226371..97f7dfe 100644
--- a/demo/sprite/sprite.go
+++ b/demo/sprite/sprite.go
@@ -11,24 +11,25 @@ const (
 type Game struct{}
 
 func (g *Game) Setup() {
-	res, err := goga.LoadRes(gopher_path)
+	// load texture
+	_, err := goga.LoadRes(gopher_path)
 
 	if err != nil {
 		panic(err)
 	}
 
-	tex, ok := res.(*goga.Tex)
+	// create sprite
+	tex, err := goga.GetTex("gopher.png")
 
-	if !ok {
-		panic("Resource is not a texture")
+	if err != nil {
+		panic(err)
 	}
 
 	sprite := goga.NewSprite(tex)
 	goga.AddActor(sprite)
 }
 
-func (g *Game) Update(delta float64) {
-}
+func (g *Game) Update(delta float64) {}
 
 func main() {
 	game := Game{}
diff --git a/res_util.go b/res_util.go
new file mode 100644
index 0000000..d4dd0e6
--- /dev/null
+++ b/res_util.go
@@ -0,0 +1,23 @@
+package goga
+
+import (
+	"errors"
+)
+
+// Finds and returns a Tex resource.
+// If not found or when the resource is of wrong type, an error will be returned.
+func GetTex(name string) (*Tex, error) {
+	res := GetResByName(name)
+
+	if res == nil {
+		return nil, errors.New("Resource not found")
+	}
+
+	tex, ok := res.(*Tex)
+
+	if !ok {
+		return nil, errors.New("Resource was not of type *Tex")
+	}
+
+	return tex, nil
+}