# -*- 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_quartz_open() ''' Start stage of colour curve control @return Zero on success ''' cdef extern int blueshift_quartz_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_quartz_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_quartz_apply(int use_crtc, float* r_curves, float* g_curves, float* b_curves) ''' Apply stage of colour curve control @param use_crtc The CRTC to use, -1 for all @param r_curve The red colour curve @param g_curve The green colour curve @param b_curve The blue colour curve @return Zero on success ''' cdef extern void blueshift_quartz_close() ''' Resource freeing stage of colour curve control ''' cdef extern void blueshift_quartz_restore() ''' Restore all gamma curves (on each and every CRTC on the system) to the settings on ColorSync ''' cdef float* r_c ''' Storage space for the red colour curve in C native data structure ''' cdef float* g_c ''' Storage space for the green colour curve in C native data structure ''' cdef float* b_c ''' Storage space for the blue colour curve in C native data structure ''' def quartz_open(): ''' Start stage of colour curve control @return :int Zero on success ''' global r_c, g_c, b_c # Allocate the storage space for the C native colour curves r_c = <float*>malloc(256 * sizeof(float)) g_c = <float*>malloc(256 * sizeof(float)) b_c = <float*>malloc(256 * sizeof(float)) # Check for out-of-memory error if (r_c is NULL) or (g_c is NULL) or (b_c is NULL): raise MemoryError() # Start using Quartz return blueshift_quartz_open() def quartz_crtc_count(): ''' Get the number of CRTC:s on the system @return :int The number of CRTC:s on the system ''' return blueshift_quartz_crtc_count() def quartz_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_quartz_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 quartz_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<float> The red colour curve @param g_curve:list<float> The green colour curve @param b_curve:list<float> The blue colour curve @return :int Zero on success ''' # Convert curves to C floats for i in range(256): r_c[i] = r_curve[i] g_c[i] = g_curve[i] b_c[i] = b_curve[i] rc = 0 # For each selected CRTC, for crtc_index in crtc_indices: # apply curves. rc |= blueshift_quartz_apply(crtc_index, r_c, g_c, b_c) return rc def quartz_close(): ''' Resource freeing stage of colour curve control ''' # Free the storage space for the colour curves free(r_c) free(g_c) free(b_c) # Close free all resources in the native code blueshift_quartz_close() def quartz_restore(): ''' Restore all gamma curves (on each and every CRTC on the system) to the settings on ColorSync ''' blueshift_quartz_restore()