1 files changed, 50 insertions, 0 deletions
diff --git a/libgamma_x_randr_crtc_get_gamma_ramps16.c b/libgamma_x_randr_crtc_get_gamma_ramps16.c
new file mode 100644
index 0000000..5e6ad5d
--- /dev/null
+++ b/libgamma_x_randr_crtc_get_gamma_ramps16.c
@@ -0,0 +1,50 @@
+/* See LICENSE file for copyright and license details. */
+#define IN_LIBGAMMA_X_RANDR
+#include "common.h"
+
+
+/**
+ * Get the current gamma ramps for a CRTC, 16-bit gamma-depth version
+ * 
+ * @param   this   The CRTC state
+ * @param   ramps  The gamma ramps to fill with the current values
+ * @return         Zero on success, otherwise (negative) the value of an
+ *                 error identifier provided by this library
+ */
+int
+libgamma_x_randr_crtc_get_gamma_ramps16(libgamma_crtc_state_t *restrict this, libgamma_gamma_ramps16_t *restrict ramps)
+{
+	xcb_connection_t *restrict connection = this->partition->site->data;
+	xcb_randr_get_crtc_gamma_cookie_t cookie;
+	xcb_randr_get_crtc_gamma_reply_t *restrict reply;
+	xcb_generic_error_t *error;
+	uint16_t *restrict red;
+	uint16_t *restrict green;
+	uint16_t *restrict blue;
+  
+#ifdef DEBUG
+	/* Gamma ramp sizes are identical but not fixed */
+	if (ramps->red_size != ramps->green_size || ramps->red_size != ramps->blue_size)
+		return LIBGAMMA_MIXED_GAMMA_RAMP_SIZE;
+#endif
+
+	/* Read current gamma ramps */
+	cookie = xcb_randr_get_crtc_gamma(connection, *(xcb_randr_crtc_t *)this->data);
+	reply = xcb_randr_get_crtc_gamma_reply(connection, cookie, &error);
+
+	/* Check for errors */
+	if (error)
+		return libgamma_x_randr_internal_translate_error(error->error_code, LIBGAMMA_GAMMA_RAMP_READ_FAILED, 0);
+
+	/* Get current gamma ramps from response */
+	red   = xcb_randr_get_crtc_gamma_red(reply);
+	green = xcb_randr_get_crtc_gamma_green(reply);
+	blue  = xcb_randr_get_crtc_gamma_blue(reply);
+	/* Copy over the gamma ramps to our memory */
+	memcpy(ramps->red,   red,   ramps->red_size   * sizeof(uint16_t));
+	memcpy(ramps->green, green, ramps->green_size * sizeof(uint16_t));
+	memcpy(ramps->blue,  blue,  ramps->blue_size  * sizeof(uint16_t));
+
+	free(reply);
+	return 0;
+}