From 16c1672c6133ac7cac28a5a11c5f6dd300c9d962 Mon Sep 17 00:00:00 2001
From: faiface <faiface@ksp.sk>
Date: Wed, 25 Jan 2017 19:04:37 +0100
Subject: [PATCH] optimize Sprite
---
graphics.go | 30 +++++++++++++++++++-----------
1 file changed, 19 insertions(+), 11 deletions(-)
diff --git a/graphics.go b/graphics.go
index a2efd7c..13f31c9 100644
--- a/graphics.go
+++ b/graphics.go
@@ -156,15 +156,25 @@ func (td *TrianglesDrawer) Append(t Triangles) {
// Sprite is a picture that can be drawn onto a Target. To change the position/rotation/scale of
// the Sprite, use Target's SetTransform method.
type Sprite struct {
- td TrianglesDrawer
- pic *Picture
+ td TrianglesDrawer
+ data *TrianglesData
+ pic *Picture
}
// NewSprite creates a Sprite with the supplied Picture. The dimensions of the returned Sprite match
// the dimensions of the Picture.
func NewSprite(pic *Picture) *Sprite {
+ data := &TrianglesData{
+ {Position: V(0, 0), Color: NRGBA{1, 1, 1, 1}, Texture: V(0, 0)},
+ {Position: V(0, 0), Color: NRGBA{1, 1, 1, 1}, Texture: V(1, 0)},
+ {Position: V(0, 0), Color: NRGBA{1, 1, 1, 1}, Texture: V(1, 1)},
+ {Position: V(0, 0), Color: NRGBA{1, 1, 1, 1}, Texture: V(0, 0)},
+ {Position: V(0, 0), Color: NRGBA{1, 1, 1, 1}, Texture: V(1, 1)},
+ {Position: V(0, 0), Color: NRGBA{1, 1, 1, 1}, Texture: V(0, 1)},
+ }
s := &Sprite{
- td: TrianglesDrawer{Triangles: &TrianglesData{}},
+ td: TrianglesDrawer{Triangles: data},
+ data: data,
}
s.SetPicture(pic)
return s
@@ -173,14 +183,12 @@ func NewSprite(pic *Picture) *Sprite {
// SetPicture changes the Picture of the Sprite and resizes it accordingly.
func (s *Sprite) SetPicture(pic *Picture) {
w, h := pic.Bounds().Size.XY()
- s.td.Update(&TrianglesData{
- {Position: V(0, 0), Color: NRGBA{1, 1, 1, 1}, Texture: V(0, 0)},
- {Position: V(w, 0), Color: NRGBA{1, 1, 1, 1}, Texture: V(1, 0)},
- {Position: V(w, h), Color: NRGBA{1, 1, 1, 1}, Texture: V(1, 1)},
- {Position: V(0, 0), Color: NRGBA{1, 1, 1, 1}, Texture: V(0, 0)},
- {Position: V(w, h), Color: NRGBA{1, 1, 1, 1}, Texture: V(1, 1)},
- {Position: V(0, h), Color: NRGBA{1, 1, 1, 1}, Texture: V(0, 1)},
- })
+ (*s.data)[0].Position = V(0, 0)
+ (*s.data)[2].Position = V(w, h)
+ (*s.data)[1].Position = V(w, 0)
+ (*s.data)[3].Position = V(0, 0)
+ (*s.data)[4].Position = V(w, h)
+ (*s.data)[5].Position = V(0, h)
s.pic = pic
}
--
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