libraries/agg: Added patches from fedora.

Signed-off-by: Matteo Bernardini <ponce@slackbuilds.org>

1 files changed, 85 insertions, 0 deletions

diff --git a/libraries/agg/patches/0006-Implement-grain-merge-blending-mode-GIMP.patch b/libraries/agg/patches/0006-Implement-grain-merge-blending-mode-GIMP.patch
new file mode 100644
index 0000000000000..f1e465b4d3a85
--- /dev/null
+++ b/libraries/agg/patches/0006-Implement-grain-merge-blending-mode-GIMP.patch
@@ -0,0 +1,85 @@
+From 9422570f4e099a834fc43619f7b2a7eb6b442e25 Mon Sep 17 00:00:00 2001
+From: Tom Hughes <tom@compton.nu>
+Date: Sun, 19 May 2013 15:31:01 +0100
+Subject: [PATCH 06/15] Implement grain-merge blending mode (GIMP)
+
+---
+ include/agg_pixfmt_rgba.h | 42 ++++++++++++++++++++++++++++++++++++++++--
+ 1 file changed, 40 insertions(+), 2 deletions(-)
+
+diff --git a/include/agg_pixfmt_rgba.h b/include/agg_pixfmt_rgba.h
+index 79d10dc..f576ce4 100644
+--- a/include/agg_pixfmt_rgba.h
++++ b/include/agg_pixfmt_rgba.h
+@@ -1401,9 +1401,46 @@ namespace agg
+         }
+     };
+ 
++    //================================================comp_op_rgba_grain_merge
++    template <typename ColorT, typename Order> struct comp_op_rgba_grain_merge
++    {
++        typedef ColorT color_type;
++        typedef Order order_type;
++        typedef typename color_type::value_type value_type;
++        typedef typename color_type::calc_type calc_type;
++        typedef typename color_type::long_type long_type;
++        enum base_scale_e
++        {
++            base_shift = color_type::base_shift,
++            base_mask  = color_type::base_mask
++        };
+ 
++        // E = I + M - 128
++        static AGG_INLINE void blend_pix(value_type* p,
++                                         unsigned sr, unsigned sg, unsigned sb,
++                                         unsigned sa, unsigned cover)
++        {
+ 
+-
++            if(cover < 255)
++            {
++                sr = (sr * cover + 255) >> 8;
++                sg = (sg * cover + 255) >> 8;
++                sb = (sb * cover + 255) >> 8;
++                sa = (sa * cover + 255) >> 8;
++            }
++            if(sa)
++            {
++                calc_type da = p[Order::A];
++                int dr = sr + p[Order::R] - 128;
++                int dg = sg + p[Order::G] - 128;
++                int db = sb + p[Order::B] - 128;
++                p[Order::R] = (value_type)(dr < 0 ? 0 : (dr > 255 ? 255 : dr));
++                p[Order::G] = (value_type)(dg < 0 ? 0 : (dg > 255 ? 255 : dg));
++                p[Order::B] = (value_type)(db < 0 ? 0 : (db > 255 ? 255 : db));
++                p[Order::A] = (value_type)(sa + da - ((sa * da + base_mask) >> base_shift));
++            }
++        }
++    };
+ 
+     //======================================================comp_op_table_rgba
+     template<class ColorT, class Order> struct comp_op_table_rgba
+@@ -1451,6 +1488,7 @@ namespace agg
+         comp_op_rgba_contrast   <ColorT,Order>::blend_pix,
+         comp_op_rgba_invert     <ColorT,Order>::blend_pix,
+         comp_op_rgba_invert_rgb <ColorT,Order>::blend_pix,
++        comp_op_rgba_grain_merge<ColorT,Order>::blend_pix,
+         0
+     };
+ 
+@@ -1486,6 +1524,7 @@ namespace agg
+         comp_op_contrast,      //----comp_op_contrast
+         comp_op_invert,        //----comp_op_invert
+         comp_op_invert_rgb,    //----comp_op_invert_rgb
++        comp_op_grain_merge,   //----comp_op_grain_merge
+ 
+         end_of_comp_op_e
+     };
+@@ -2908,4 +2947,3 @@ namespace agg
+ }
+ 
+ #endif
+-
+-- 
+1.8.1.4
+