# -*- python -*-
# Copyright © 2014 Mattias Andrée (maandree@member.fsf.org)
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
cimport cython
from libc.stdlib cimport malloc, free
cdef extern int blueshift_randr_open(int use_screen)
cdef extern unsigned short int* blueshift_randr_read(int use_crtc)
cdef extern int blueshift_randr_apply(unsigned long long int use_crtcs,
unsigned short int* r_curve,
unsigned short int* g_curve,
unsigned short int* b_curve)
cdef extern void blueshift_randr_close()
def randr_open(int use_screen):
'''
Start stage of colour curve control
@param use_screen The screen to use
@return Zero on success
'''
return blueshift_randr_open(use_screen)
def randr_read(int use_crtc):
'''
Gets the current colour curves
@param use_crtc The CRTC to use
@return :(r:list<int>, g:list<int>, b:list<int>) The current red, green and blue colour curves
'''
cdef unsigned short int* got
got = blueshift_randr_read(use_crtc)
if got is NULL:
raise Exception()
r, g, b, i = [], [], [], 0
for c in (r, g, b):
s = got[i]
i += 1
for j in range(s):
c.append(got[i + j])
i += s
return (r, g, b)
def randr_apply(unsigned long long use_crtcs, r_curve, g_curve, b_curve):
'''
Apply stage of colour curve control
@param use_crtcs Mask of CRTC:s to use
@param r_curve:list<unsigned short int> The red colour curve
@param g_curve:list<unsigned short int> The green colour curve
@param b_curve:list<unsigned short int> The blue colour curve
@return Zero on success
'''
cdef unsigned short int* r
cdef unsigned short int* g
cdef unsigned short int* b
r = <unsigned short int*>malloc(256 * 2)
g = <unsigned short int*>malloc(256 * 2)
b = <unsigned short int*>malloc(256 * 2)
if (r is NULL) or (g is NULL) or (b is NULL):
raise MemoryError()
for i in range(256):
r[i] = r_curve[i] & 0xFFFF
g[i] = g_curve[i] & 0xFFFF
b[i] = b_curve[i] & 0xFFFF
rc = blueshift_randr_apply(use_crtcs, r, g, b)
free(r)
free(g)
free(b)
return rc
def randr_close():
'''
Resource freeing stage of colour curve control
'''
blueshift_randr_close()
