From a9d735dafe1fbee3d4fd65e261a226ea158c2ed1 Mon Sep 17 00:00:00 2001
From: faiface <faiface@ksp.sk>
Date: Tue, 2 May 2017 22:46:27 +0200
Subject: [PATCH] optimize Drawer.Dirty (defer the hard part until drawing)
---
drawer.go | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/drawer.go b/drawer.go
index 25d61aa..e4ccd45 100644
--- a/drawer.go
+++ b/drawer.go
@@ -27,6 +27,7 @@ type Drawer struct {
tris map[Target]TargetTriangles
clean map[Target]bool
pics map[targetPicturePair]TargetPicture
+ dirty bool
inited bool
}
@@ -49,9 +50,7 @@ func (d *Drawer) lazyInit() {
func (d *Drawer) Dirty() {
d.lazyInit()
- for t := range d.clean {
- d.clean[t] = false
- }
+ d.dirty = true
}
// Draw efficiently draws Triangles with Picture onto the provided Target.
@@ -61,6 +60,13 @@ func (d *Drawer) Dirty() {
func (d *Drawer) Draw(t Target) {
d.lazyInit()
+ if d.dirty {
+ for t := range d.clean {
+ d.clean[t] = false
+ }
+ d.dirty = false
+ }
+
if d.Triangles == nil {
return
}
--
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