Cleanup: convert compositor nodes to c++

- Many cleanups of to use list base
- Some variable changes

These change is needed to migrate to the new socket builder API

Reviewed By: manzanilla

Differential Revision: https://developer.blender.org/D12366

1 files changed, 94 insertions, 0 deletions

diff --git a/source/blender/nodes/composite/nodes/node_composite_colorbalance.cc b/source/blender/nodes/composite/nodes/node_composite_colorbalance.cc
new file mode 100644
index 00000000000..0ca8eecd7db
--- /dev/null
+++ b/source/blender/nodes/composite/nodes/node_composite_colorbalance.cc
@@ -0,0 +1,94 @@
+/*
+ * 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) 2006 Blender Foundation.
+ * All rights reserved.
+ */
+
+/** \file
+ * \ingroup cmpnodes
+ */
+
+#include "node_composite_util.hh"
+
+/* ******************* Color Balance ********************************* */
+static bNodeSocketTemplate cmp_node_colorbalance_in[] = {
+    {SOCK_FLOAT, N_("Fac"), 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f, PROP_FACTOR},
+    {SOCK_RGBA, N_("Image"), 1.0f, 1.0f, 1.0f, 1.0f},
+    {-1, ""},
+};
+
+static bNodeSocketTemplate cmp_node_colorbalance_out[] = {
+    {SOCK_RGBA, N_("Image")},
+    {-1, ""},
+};
+
+/* Sync functions update formula parameters for other modes, such that the result is comparable.
+ * Note that the results are not exactly the same due to differences in color handling
+ * (sRGB conversion happens for LGG),
+ * but this keeps settings comparable.
+ */
+
+void ntreeCompositColorBalanceSyncFromLGG(bNodeTree *UNUSED(ntree), bNode *node)
+{
+  NodeColorBalance *n = (NodeColorBalance *)node->storage;
+
+  for (int c = 0; c < 3; c++) {
+    n->slope[c] = (2.0f - n->lift[c]) * n->gain[c];
+    n->offset[c] = (n->lift[c] - 1.0f) * n->gain[c];
+    n->power[c] = (n->gamma[c] != 0.0f) ? 1.0f / n->gamma[c] : 1000000.0f;
+  }
+}
+
+void ntreeCompositColorBalanceSyncFromCDL(bNodeTree *UNUSED(ntree), bNode *node)
+{
+  NodeColorBalance *n = (NodeColorBalance *)node->storage;
+
+  for (int c = 0; c < 3; c++) {
+    float d = n->slope[c] + n->offset[c];
+    n->lift[c] = (d != 0.0f ? n->slope[c] + 2.0f * n->offset[c] / d : 0.0f);
+    n->gain[c] = d;
+    n->gamma[c] = (n->power[c] != 0.0f) ? 1.0f / n->power[c] : 1000000.0f;
+  }
+}
+
+static void node_composit_init_colorbalance(bNodeTree *UNUSED(ntree), bNode *node)
+{
+  NodeColorBalance *n = (NodeColorBalance *)MEM_callocN(sizeof(NodeColorBalance),
+                                                        "node colorbalance");
+
+  n->lift[0] = n->lift[1] = n->lift[2] = 1.0f;
+  n->gamma[0] = n->gamma[1] = n->gamma[2] = 1.0f;
+  n->gain[0] = n->gain[1] = n->gain[2] = 1.0f;
+
+  n->slope[0] = n->slope[1] = n->slope[2] = 1.0f;
+  n->offset[0] = n->offset[1] = n->offset[2] = 0.0f;
+  n->power[0] = n->power[1] = n->power[2] = 1.0f;
+  node->storage = n;
+}
+
+void register_node_type_cmp_colorbalance(void)
+{
+  static bNodeType ntype;
+
+  cmp_node_type_base(&ntype, CMP_NODE_COLORBALANCE, "Color Balance", NODE_CLASS_OP_COLOR, 0);
+  node_type_socket_templates(&ntype, cmp_node_colorbalance_in, cmp_node_colorbalance_out);
+  node_type_size(&ntype, 400, 200, 400);
+  node_type_init(&ntype, node_composit_init_colorbalance);
+  node_type_storage(
+      &ntype, "NodeColorBalance", node_free_standard_storage, node_copy_standard_storage);
+
+  nodeRegisterType(&ntype);
+}