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author | Mattias Andrée <maandree@kth.se> | 2021-03-22 22:50:17 +0100 |
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committer | Mattias Andrée <maandree@kth.se> | 2021-03-22 22:50:17 +0100 |
commit | 3f448c6ed5ee999aa85677db886364f3e798f4e0 (patch) | |
tree | e4d7dfa314c78196e931da7045306b8ee47d99af | |
parent | Fix support for musl (diff) | |
download | libgamma-3f448c6ed5ee999aa85677db886364f3e798f4e0.tar.gz libgamma-3f448c6ed5ee999aa85677db886364f3e798f4e0.tar.bz2 libgamma-3f448c6ed5ee999aa85677db886364f3e798f4e0.tar.xz |
Add test for seeing if inversion as supported
Signed-off-by: Mattias Andrée <maandree@kth.se>
Diffstat (limited to '')
-rw-r--r-- | test.c | 31 |
1 files changed, 31 insertions, 0 deletions
@@ -49,6 +49,27 @@ /** + * Invertion mapping function from [0, 1] float encoding value to [0, 2¹⁶ − 1] integer output value + * + * @param encoding [0, 1] float encoding value + * @return [0, 2¹⁶ − 1] integer output value + */ +LIBGAMMA_GCC_ONLY__(__attribute__((__const__))) +static uint16_t +inv_ramps16(float encoding) +{ + double i_encoding = (double)(1.f - encoding); + double f_output = (double)UINT16_MAX * i_encoding; + uint16_t output = (uint16_t)f_output; + if (i_encoding < (double)0.25f && output > UINT16_MAX / 2) + output = 0; + if (i_encoding > (double)0.75f && output < UINT16_MAX / 2) + output = UINT16_MAX; + return output; +} + + +/** * Test mapping function from [0, 1] float encoding value to [0, 2⁸ − 1] integer output value * * @param encoding [0, 1] float encoding value @@ -1516,6 +1537,16 @@ main(void) libgamma_perror("libgamma_crtc_set_gamma_ramps64", r); printf("Done!\n"); + /* Test inversion (does not work properly on all devices) */ + printf("Inverting monitor output for 1 second... (does not work properly on all devices) (ramps16)\n"); + if ((rr |= r = libgamma_crtc_set_gamma_ramps16_f(crtc_state, inv_ramps16, inv_ramps16, inv_ramps16))) + libgamma_perror("libgamma_crtc_set_gamma_ramps16_f", r); + sleep(1); + if ((rr |= r = libgamma_crtc_set_gamma_ramps16(crtc_state, &old_ramps16))) + libgamma_perror("libgamma_crtc_set_gamma_ramps16", r); + printf("Done!\n"); + sleep(1); + /* TODO Test gamma ramp restore functions */ done: |