diff options
Diffstat (limited to 'libraries/agg/patches/0012-Avoid-pixel-artifacts-when-compositing.patch')
| -rw-r--r-- | libraries/agg/patches/0012-Avoid-pixel-artifacts-when-compositing.patch | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/libraries/agg/patches/0012-Avoid-pixel-artifacts-when-compositing.patch b/libraries/agg/patches/0012-Avoid-pixel-artifacts-when-compositing.patch new file mode 100644 index 0000000000..b3e641e6f5 --- /dev/null +++ b/libraries/agg/patches/0012-Avoid-pixel-artifacts-when-compositing.patch @@ -0,0 +1,26 @@ +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 + |