# -*- 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 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
from libc.stdint cimport *
cdef extern int blueshift_w32gdi_open()
'''
Start stage of colour curve control
@return Zero on success
'''
cdef extern int blueshift_w32gdi_crtc_count()
'''
Get the number of CRTC:s on the system
@return The number of CRTC:s on the system
'''
cdef extern uint16_t* blueshift_w32gdi_read(int use_crtc)
'''
Gets the current colour curves
@param use_crtc The CRTC to use
@return {the size of the each curve, *the red curve,
*the green curve, *the blue curve},
needs to be free:d. `NULL` on error.
'''
cdef extern int blueshift_w32gdi_apply(int use_crtc, uint16_t* rgb_curves)
'''
Apply stage of colour curve control
@param use_crtc The CRTC to use, -1 for all
@param rgb_curve The concatenation of the red, the green and the blue colour curves
@return Zero on success
'''
cdef extern void blueshift_w32gdi_close()
'''
Resource freeing stage of colour curve control
'''
cdef uint16_t* rgb_c
'''
Storage space for the colour curves in C native data structure
'''
def w32gdi_open():
'''
Start stage of colour curve control
@return :int Zero on success
'''
global rgb_c
# Allocate the storage space for the C native colour curves
rgb_c = <uint16_t*>malloc(3 * 256 * sizeof(uint16_t))
# Check for out-of-memory error
if (rgb_c is NULL):
raise MemoryError()
# Start using W32 GDI
return blueshift_w32gdi_open()
def w32gdi_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 uint16_t* got
# Read the current curves
got = blueshift_w32gdi_read(use_crtc)
if got is NULL:
raise Exception()
# Convert to Python integer lists
r, g, b, i = [], [], [], 1
s = got[0]
for c in (r, g, b):
# while extracting the sizes of the curves
for j in range(s):
c.append(got[i + j])
i += s
# Free the native curves
free(got)
return (r, g, b)
def w32gdi_apply(crtc_indices, r_curve, g_curve, b_curve):
'''
Apply stage of colour curve control
@param crtc_indices:list<int> The indices of the CRTC:s to control, -1 for all
@param r_curve:list<int> The red colour curve
@param g_curve:list<int> The green colour curve
@param b_curve:list<int> The blue colour curve
@return Zero on success
'''
# Convert curves to 16-bit C integers
for i in range(256):
rgb_c[0 * 256 + i] = r_curve[i] & 0xFFFF
rgb_c[1 * 256 + i] = g_curve[i] & 0xFFFF
rgb_c[2 * 256 + i] = b_curve[i] & 0xFFFF
rc = 0
# For each selected CRTC,
for crtc_index in crtc_indices:
# apply curves.
rc |= blueshift_w32gdi_apply(crtc_index, rgb_c)
return rc
def w32gdi_close():
'''
Resource freeing stage of colour curve control
'''
# Free the storage space for the colour curves
free(rgb_c)
# Close free all resources in the native code
blueshift_w32gdi_close()
