From 268e1b72f5c55e526fba3c326ab043421acb1147 Mon Sep 17 00:00:00 2001
From: faiface <faiface@ksp.sk>
Date: Thu, 12 Jan 2017 14:50:28 +0100
Subject: [PATCH] add Picture correctness check in Batch.SetPicture
---
batch.go | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/batch.go b/batch.go
index bd60136..0d6b000 100644
--- a/batch.go
+++ b/batch.go
@@ -52,9 +52,15 @@ func (b *Batch) MakeTriangles(t Triangles) Triangles {
}
}
-// SetPicture does nothing, because the Picture of any Batch is fixed.
+// SetPicture only checks, whether the supplied Picture has the same underlying Picture as the fixed
+// Picture of this Batch. If that is not true, this method panics.
func (b *Batch) SetPicture(p *Picture) {
- // nothing, Batch has a fixed Picture
+ if p == nil {
+ return
+ }
+ if p.Texture() != b.pic.Texture() {
+ panic("batch: attempted to draw with a different Picture")
+ }
}
// SetTransform sets transforms used in the following draws onto the Batch.
--
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