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authorMattias Andrée <maandree@operamail.com>2014-02-22 13:25:31 +0100
committerMattias Andrée <maandree@operamail.com>2014-02-22 13:25:31 +0100
commit6b021b686cf4edfb40673e64ecda307b4f6262d8 (patch)
tree0f9d29e6fb9baa3b99be85f7635a98db601b21bd /src/curve.py
parentm (diff)
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add (prototype for) lower_resolution just for fun
Signed-off-by: Mattias Andrée <maandree@operamail.com>
Diffstat (limited to 'src/curve.py')
-rw-r--r--src/curve.py18
1 files changed, 18 insertions, 0 deletions
diff --git a/src/curve.py b/src/curve.py
index c88b02d..c98f454 100644
--- a/src/curve.py
+++ b/src/curve.py
@@ -455,6 +455,24 @@ def manipulate(r, g = None, b = None):
curve[i] = f(curve[i])
+# TODO document this elsewhere, and make it possible to have non-round x_colours
+def lower_resolution(x_colours, y_colours):
+ '''
+ Emulates low colour resolution
+
+ @param x_colours:int The number of colours to emulate on the encoding axis
+ @param y_colours:int The number of colours to emulate on the output axis
+ '''
+ x_r = i_size / x_colours
+ y_r = o_size / y_colours
+ for curve in (r_curve, g_curve, b_curve):
+ for i in range(i_size):
+ x = int(x_r * int(i / x_r))
+ y = curve[x] * 2 ** 16
+ y = int(y_r * int(y / y_r))
+ curve[i] = y / 2 ** 16
+
+
def start_over():
'''
Reverts all colours curves to identity mappings.