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| -rw-r--r-- | src/blueshift_w32gdi.pyx | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/src/blueshift_w32gdi.pyx b/src/blueshift_w32gdi.pyx new file mode 100644 index 0000000..753bd1c --- /dev/null +++ b/src/blueshift_w32gdi.pyx @@ -0,0 +1,142 @@ +# -*- 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_w32_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, r_c, g_c, b_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() + |