Compositor: New Exposure Node

This new node increases the radiance of an image by a scalar value.
Previously, the only way to adjust the the exposure of an image was with
math node or using the scene's color management.

Reviewed By: jbakker

Differential Revision: https://developer.blender.org/D9677

1 files changed, 46 insertions, 0 deletions

diff --git a/source/blender/nodes/composite/nodes/node_composite_exposure.c b/source/blender/nodes/composite/nodes/node_composite_exposure.c
new file mode 100644
index 00000000000..bd27e4a3d76
--- /dev/null
+++ b/source/blender/nodes/composite/nodes/node_composite_exposure.c
@@ -0,0 +1,46 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * The Original Code is Copyright (C) 2020 Blender Foundation.
+ * All rights reserved.
+ */
+
+/** \file
+ * \ingroup cmpnodes
+ */
+
+#include "node_composite_util.h"
+
+/* **************** Exposure ******************** */
+
+static bNodeSocketTemplate cmp_node_exposure_in[] = {
+    {SOCK_RGBA, N_("Image"), 1.0f, 1.0f, 1.0f, 1.0f},
+    {SOCK_FLOAT, N_("Exposure"), 0.0f, 0.0f, 0.0f, 0.0f, -10.0f, 10.0f, PROP_NONE},
+    {-1, ""},
+};
+static bNodeSocketTemplate cmp_node_exposure_out[] = {
+    {SOCK_RGBA, N_("Image")},
+    {-1, ""},
+};
+
+void register_node_type_cmp_exposure(void)
+{
+  static bNodeType ntype;
+
+  cmp_node_type_base(&ntype, CMP_NODE_EXPOSURE, "Exposure", NODE_CLASS_OP_COLOR, 0);
+  node_type_socket_templates(&ntype, cmp_node_exposure_in, cmp_node_exposure_out);
+
+  nodeRegisterType(&ntype);
+}