27 lines
1.1 KiB
Diff
27 lines
1.1 KiB
Diff
From bf0e0b71360cfbc690a29f4abe15d7b9b61b8479 Mon Sep 17 00:00:00 2001
|
|
From: Tom Hughes <tom@compton.nu>
|
|
Date: Sat, 22 Jun 2013 12:11:54 +0100
|
|
Subject: [PATCH 12/15] Avoid pixel artifacts when compositing
|
|
|
|
Change src_over alpha to avoid pixel artifacts by reordering computations.
|
|
---
|
|
include/agg_pixfmt_rgba.h | 2 +-
|
|
1 file changed, 1 insertion(+), 1 deletion(-)
|
|
|
|
diff --git a/include/agg_pixfmt_rgba.h b/include/agg_pixfmt_rgba.h
|
|
index 5d6b511..bb255cd 100644
|
|
--- a/include/agg_pixfmt_rgba.h
|
|
+++ b/include/agg_pixfmt_rgba.h
|
|
@@ -346,7 +346,7 @@ namespace agg
|
|
p[Order::R] = (value_type)(sr + ((p[Order::R] * s1a + base_mask) >> base_shift));
|
|
p[Order::G] = (value_type)(sg + ((p[Order::G] * s1a + base_mask) >> base_shift));
|
|
p[Order::B] = (value_type)(sb + ((p[Order::B] * s1a + base_mask) >> base_shift));
|
|
- p[Order::A] = (value_type)(sa + p[Order::A] - ((sa * p[Order::A] + base_mask) >> base_shift));
|
|
+ p[Order::A] = (value_type)(sa + ((p[Order::A] * s1a + base_mask) >> base_shift));
|
|
}
|
|
};
|
|
|
|
--
|
|
1.8.1.4
|
|
|