# -*- 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_randr_open(int use_screen, char* display) ''' Start stage of colour curve control @param use_screen The screen to use @param display The display to use, `NULL` for the current one @return Zero on success ''' cdef extern uint16_t* blueshift_randr_read(int use_crtc) ''' Gets the current colour curves @param use_crtc The CRTC to use @return {the size of the red curve, *the red curve, the size of the green curve, *the green curve, the size of the blue curve, *the blue curve}, needs to be free:d. `NULL` on error. ''' cdef extern int blueshift_randr_apply(int use_crtc, uint16_t* r_curve, uint16_t* g_curve, uint16_t* b_curve) ''' 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_randr_close() ''' Resource freeing stage of colour curve control ''' cdef uint16_t* r_c ''' Storage space for the red colour curve in C native data structure ''' cdef uint16_t* g_c ''' Storage space for the green colour curve in C native data structure ''' cdef uint16_t* b_c ''' Storage space for the blue colour curve in C native data structure ''' def randr_open(int use_screen, display): ''' Start stage of colour curve control @param use_screen The screen to use @param display:bytes? The display to use, `None` for the current @return :int Zero on success ''' global r_c, g_c, b_c # Get the display to use cdef char* display_ = NULL if display is not None: display_ = display # Allocate the storage space for the C native colour curves r_c = <uint16_t*>malloc(256 * sizeof(uint16_t)) g_c = <uint16_t*>malloc(256 * sizeof(uint16_t)) b_c = <uint16_t*>malloc(256 * sizeof(uint16_t)) # 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 RandR for the screen and display return blueshift_randr_open(use_screen, display_) 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 uint16_t* got # Read the current curves got = blueshift_randr_read(use_crtc) if got is NULL: raise Exception() # Convert to Python integer lists r, g, b, i = [], [], [], 0 for c in (r, g, b): # while extracting the sizes of the curves s = got[i] i += 1 for j in range(s): c.append(got[i + j]) i += s # Free the native curves free(got) return (r, g, b) def randr_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): r_c[i] = r_curve[i] & 0xFFFF g_c[i] = g_curve[i] & 0xFFFF b_c[i] = b_curve[i] & 0xFFFF rc = 0 # For each selected CRTC, for crtc_index in crtc_indices: # apply curves. rc |= blueshift_randr_apply(crtc_index, r_c, g_c, b_c) return rc def randr_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_randr_close()