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authorMattias Andrée <maandree@kth.se>2021-03-22 22:50:17 +0100
committerMattias Andrée <maandree@kth.se>2021-03-22 22:50:17 +0100
commit3f448c6ed5ee999aa85677db886364f3e798f4e0 (patch)
treee4d7dfa314c78196e931da7045306b8ee47d99af
parentFix support for musl (diff)
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Add test for seeing if inversion as supported
Signed-off-by: Mattias Andrée <maandree@kth.se>
Diffstat (limited to '')
-rw-r--r--test.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/test.c b/test.c
index eaf9b37..a546467 100644
--- a/test.c
+++ b/test.c
@@ -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: