misc

Signed-off-by: Mattias Andrée <maandree@kth.se>

1 files changed, 44 insertions, 0 deletions

diff --git a/libgamma_dummy_internal_crtc_restore_forced.c b/libgamma_dummy_internal_crtc_restore_forced.c
new file mode 100644
index 0000000..c05f9bf
--- /dev/null
+++ b/libgamma_dummy_internal_crtc_restore_forced.c
@@ -0,0 +1,44 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+/**
+ * Restore the gamma ramps for a CRTC to the system settings for that CRTC
+ * and ignore the method's capabilities
+ * 
+ * @param   this  The CRTC data
+ * @return        Zero on success, otherwise (negative) the value of an
+ *                error identifier provided by this library
+ */
+int
+libgamma_dummy_internal_crtc_restore_forced(libgamma_dummy_crtc_t *restrict data)
+{
+	size_t rn = data->info.  red_gamma_size;
+	size_t gn = data->info.green_gamma_size;
+	size_t bn = data->info. blue_gamma_size;
+	size_t i;
+
+	if (!data->gamma_red)
+		return 0;
+
+#define __reset_ramps(TYPE, MAX)\
+	do {\
+		TYPE *red   = data->gamma_red;\
+		TYPE *green = data->gamma_green;\
+		TYPE *blue  = data->gamma_blue;\
+		for (i = 0; i < rn; i++) red  [i] = (TYPE)((double)(MAX) * ((double)i / (double)(rn - 1)));\
+		for (i = 0; i < gn; i++) green[i] = (TYPE)((double)(MAX) * ((double)i / (double)(gn - 1)));\
+		for (i = 0; i < bn; i++) blue [i] = (TYPE)((double)(MAX) * ((double)i / (double)(bn - 1)));\
+	} while (0)
+
+	if      (data->info.gamma_depth ==  8) __reset_ramps(uint8_t,  INT8_MAX);
+	else if (data->info.gamma_depth == 16) __reset_ramps(uint16_t, INT16_MAX);
+	else if (data->info.gamma_depth == 32) __reset_ramps(uint32_t, INT32_MAX);
+	else if (data->info.gamma_depth == 64) __reset_ramps(uint64_t, INT64_MAX);
+	else if (data->info.gamma_depth == -1) __reset_ramps(float,    1);
+	else                                   __reset_ramps(double,   1);
+
+#undef __reset_ramps
+
+	return 0;
+}