/* SPDX-License-Identifier: GPL-2.0-or-later
 * Copyright 2006 Blender Foundation. All rights reserved. */

/** \file
 * \ingroup cmpnodes
 */

#include "RNA_access.h"

#include "UI_interface.h"
#include "UI_resources.h"

#include "COM_node_operation.hh"

#include "node_composite_util.hh"

namespace blender::nodes::node_composite_tonemap_cc {

static void cmp_node_tonemap_declare(NodeDeclarationBuilder &b)
{
  b.add_input<decl::Color>(N_("Image")).default_value({1.0f, 1.0f, 1.0f, 1.0f});
  b.add_output<decl::Color>(N_("Image"));
}

static void node_composit_init_tonemap(bNodeTree * /*ntree*/, bNode *node)
{
  NodeTonemap *ntm = MEM_cnew<NodeTonemap>(__func__);
  ntm->type = 1;
  ntm->key = 0.18;
  ntm->offset = 1;
  ntm->gamma = 1;
  ntm->f = 0;
  ntm->m = 0; /* Actual value is set according to input. */
  /* Default a of 1 works well with natural HDR images, but not always so for CGI.
   * Maybe should use 0 or at least lower initial value instead. */
  ntm->a = 1;
  ntm->c = 0;
  node->storage = ntm;
}

static void node_composit_buts_tonemap(uiLayout *layout, bContext * /*C*/, PointerRNA *ptr)
{
  uiLayout *col;

  col = uiLayoutColumn(layout, false);
  uiItemR(col, ptr, "tonemap_type", UI_ITEM_R_SPLIT_EMPTY_NAME, "", ICON_NONE);
  if (RNA_enum_get(ptr, "tonemap_type") == 0) {
    uiItemR(col, ptr, "key", UI_ITEM_R_SPLIT_EMPTY_NAME | UI_ITEM_R_SLIDER, nullptr, ICON_NONE);
    uiItemR(col, ptr, "offset", UI_ITEM_R_SPLIT_EMPTY_NAME, nullptr, ICON_NONE);
    uiItemR(col, ptr, "gamma", UI_ITEM_R_SPLIT_EMPTY_NAME, nullptr, ICON_NONE);
  }
  else {
    uiItemR(col, ptr, "intensity", UI_ITEM_R_SPLIT_EMPTY_NAME, nullptr, ICON_NONE);
    uiItemR(
        col, ptr, "contrast", UI_ITEM_R_SPLIT_EMPTY_NAME | UI_ITEM_R_SLIDER, nullptr, ICON_NONE);
    uiItemR(
        col, ptr, "adaptation", UI_ITEM_R_SPLIT_EMPTY_NAME | UI_ITEM_R_SLIDER, nullptr, ICON_NONE);
    uiItemR(
        col, ptr, "correction", UI_ITEM_R_SPLIT_EMPTY_NAME | UI_ITEM_R_SLIDER, nullptr, ICON_NONE);
  }
}

using namespace blender::realtime_compositor;

class ToneMapOperation : public NodeOperation {
 public:
  using NodeOperation::NodeOperation;

  void execute() override
  {
    get_input("Image").pass_through(get_result("Image"));
  }
};

static NodeOperation *get_compositor_operation(Context &context, DNode node)
{
  return new ToneMapOperation(context, node);
}

}  // namespace blender::nodes::node_composite_tonemap_cc

void register_node_type_cmp_tonemap()
{
  namespace file_ns = blender::nodes::node_composite_tonemap_cc;

  static bNodeType ntype;

  cmp_node_type_base(&ntype, CMP_NODE_TONEMAP, "Tonemap", NODE_CLASS_OP_COLOR);
  ntype.declare = file_ns::cmp_node_tonemap_declare;
  ntype.draw_buttons = file_ns::node_composit_buts_tonemap;
  node_type_init(&ntype, file_ns::node_composit_init_tonemap);
  node_type_storage(&ntype, "NodeTonemap", node_free_standard_storage, node_copy_standard_storage);
  ntype.get_compositor_operation = file_ns::get_compositor_operation;

  nodeRegisterType(&ntype);
}