misc

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

1 files changed, 35 insertions, 0 deletions

diff --git a/libgamma_w32_gdi_partition_initialise.c b/libgamma_w32_gdi_partition_initialise.c
new file mode 100644
index 0000000..81ab398
--- /dev/null
+++ b/libgamma_w32_gdi_partition_initialise.c
@@ -0,0 +1,35 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+
+/**
+ * Initialise an allocated partition state
+ * 
+ * @param   this       The partition state to initialise
+ * @param   site       The site state for the site that the partition belongs to
+ * @param   partition  The the index of the partition within the site
+ * @return             Zero on success, otherwise (negative) the value of an
+ *                     error identifier provided by this library
+ */
+int
+libgamma_w32_gdi_partition_initialise(libgamma_partition_state_t *restrict this,
+                                      libgamma_site_state_t *restrict site, size_t partition)
+{
+	DWORD n = 0;
+	DISPLAY_DEVICE display;
+
+	(void) site;
+
+	if (partition)
+		return LIBGAMMA_NO_SUCH_PARTITION;
+
+	/* Count CRTC:s by iteration over all possible identifiers
+	   until we reach on that does not exist */
+	display.cb = sizeof(DISPLAY_DEVICE);
+	while (EnumDisplayDevices(NULL, n, &display, 0))
+		if (n++ == UINT32_MAX)
+			return LIBGAMMA_IMPOSSIBLE_AMOUNT;
+	this->crtcs_available = (size_t)n;
+	return 0;
+}