misc

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

1 files changed, 57 insertions, 0 deletions

diff --git a/libgamma_dummy_crtc_initialise.c b/libgamma_dummy_crtc_initialise.c
new file mode 100644
index 0000000..1ae9161
--- /dev/null
+++ b/libgamma_dummy_crtc_initialise.c
@@ -0,0 +1,57 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+/**
+ * Initialise an allocated CRTC state
+ * 
+ * @param   this       The CRTC state to initialise
+ * @param   partition  The partition state for the partition that the CRTC belongs to
+ * @param   crtc       The the index of the CRTC within the site
+ * @return             Zero on success, otherwise (negative) the value of an
+ *                     error identifier provided by this library
+ */
+int
+libgamma_dummy_crtc_initialise(libgamma_crtc_state_t *restrict this,
+                               libgamma_partition_state_t *restrict partition, size_t crtc)
+{
+	libgamma_dummy_partition_t *partition_data = partition->data;
+	libgamma_dummy_crtc_t *data = &partition_data->crtcs[crtc];
+	size_t stop_size;
+
+	this->data = NULL;
+
+	if (crtc >= partition_data->crtc_count)
+		return LIBGAMMA_NO_SUCH_CRTC;
+
+	this->data = data;
+	data->state = this;
+
+	if (data->info.gamma_depth == -1)
+		stop_size = sizeof(float);
+	else if (data->info.gamma_depth == -2)
+		stop_size = sizeof(double);
+	else
+		stop_size = (size_t)data->info.gamma_depth / 8;
+
+	data->gamma_red = malloc(data->info.red_gamma_size * stop_size);
+	if (!data->gamma_red)
+		goto fail;
+	data->gamma_green = malloc(data->info.green_gamma_size * stop_size);
+	if (!data->gamma_green)
+		goto fail;
+	data->gamma_blue = malloc(data->info.blue_gamma_size * stop_size);
+	if (!data->gamma_blue)
+		goto fail;
+
+	return libgamma_dummy_internal_crtc_restore_forced(data);
+
+fail:
+	free(data->gamma_red);
+	data->gamma_red = NULL;
+	free(data->gamma_green);
+	data->gamma_green = NULL;
+	free(data->gamma_blue);
+	data->gamma_blue  = NULL;
+	return LIBGAMMA_ERRNO_SET;
+}