From d12256b0f8e826080956b9b156ffb901b18368e7 Mon Sep 17 00:00:00 2001
From: sam <sam@92316355-f0b4-4df1-b90c-862c8a59935f>
Date: Sat, 23 Aug 2008 13:07:47 +0000
Subject: [PATCH] * stock.c: add new error diffusion kernels: Fan, Shiau-Fan,
Stucki, Burkes, Sierra, two-row Sierra, Filter Lite.
git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@2760 92316355-f0b4-4df1-b90c-862c8a59935f
---
pipi/stock.c | 76 +++++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 75 insertions(+), 1 deletion(-)
diff --git a/pipi/stock.c b/pipi/stock.c
index 3960cda..947c8e3 100644
--- a/pipi/stock.c
+++ b/pipi/stock.c
@@ -84,7 +84,7 @@ pipi_image_t *pipi_load_stock(char const *name)
static float const myker[] =
{
0., 1., 7./16,
- 3./16, 5./16, 1./16
+ 3./16, 5./16, 1./16,
};
ker = myker; w = 3; h = 2;
}
@@ -108,6 +108,80 @@ pipi_image_t *pipi_load_stock(char const *name)
};
ker = myker; w = 4; h = 3;
}
+ else if(!strcmp(name + 6, "fan"))
+ {
+ static float const myker[] =
+ {
+ 0., 0., 1., 7./16,
+ 1./16, 3./16, 5./16, 0.,
+ };
+ ker = myker; w = 4; h = 2;
+ }
+ else if(!strcmp(name + 6, "shiaufan"))
+ {
+ static float const myker[] =
+ {
+ 0., 0., 1., 1./2,
+ 1./8, 1./8, 1./4, 0.,
+ };
+ ker = myker; w = 4; h = 2;
+ }
+ else if(!strcmp(name + 6, "shiaufan2"))
+ {
+ static float const myker[] =
+ {
+ 0., 0., 0., 1., 1./2,
+ 1./16, 1./16, 1./8, 1./4, 0.,
+ };
+ ker = myker; w = 5; h = 2;
+ }
+ else if(!strcmp(name + 6, "stucki"))
+ {
+ static float const myker[] =
+ {
+ 0., 0., 1., 8./42, 4./42,
+ 2./42, 4./42, 8./42, 4./42, 2./42,
+ 1./42, 2./42, 4./42, 2./42, 1./42,
+ };
+ ker = myker; w = 5; h = 3;
+ }
+ else if(!strcmp(name + 6, "burkes"))
+ {
+ static float const myker[] =
+ {
+ 0., 0., 1., 4./16, 2./16,
+ 1./16, 2./16, 4./16, 2./16, 1./16,
+ };
+ ker = myker; w = 5; h = 2;
+ }
+ else if(!strcmp(name + 6, "sierra"))
+ {
+ static float const myker[] =
+ {
+ 0., 0., 1., 5./32, 3./32,
+ 2./32, 4./32, 5./32, 4./32, 2./32,
+ 0., 2./32, 3./32, 2./32, 0.,
+ };
+ ker = myker; w = 5; h = 3;
+ }
+ else if(!strcmp(name + 6, "sierra2"))
+ {
+ static float const myker[] =
+ {
+ 0., 0., 1., 4./16, 3./16,
+ 1./16, 2./16, 3./16, 2./16, 1./16,
+ };
+ ker = myker; w = 5; h = 2;
+ }
+ else if(!strcmp(name + 6, "lite"))
+ {
+ static float const myker[] =
+ {
+ 0., 1., 1./2,
+ 1./4, 1./4, 0.,
+ };
+ ker = myker; w = 3; h = 2;
+ }
else
return NULL;