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

/** \file
 * \ingroup cmpnodes
 */

#include "BKE_texture.h"

#include "RNA_access.h"

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

#include "GPU_material.h"

#include "COM_shader_node.hh"

#include "node_composite_util.hh"

/* **************** MAP VALUE ******************** */

namespace blender::nodes::node_composite_map_value_cc {

NODE_STORAGE_FUNCS(TexMapping)

static void cmp_node_map_value_declare(NodeDeclarationBuilder &b)
{
  b.add_input<decl::Float>(N_("Value"))
      .default_value(1.0f)
      .min(0.0f)
      .max(1.0f)
      .compositor_domain_priority(0);
  b.add_output<decl::Float>(N_("Value"));
}

static void node_composit_init_map_value(bNodeTree * /*ntree*/, bNode *node)
{
  node->storage = BKE_texture_mapping_add(TEXMAP_TYPE_POINT);
}

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

  col = uiLayoutColumn(layout, true);
  uiItemR(col, ptr, "offset", UI_ITEM_R_SPLIT_EMPTY_NAME, nullptr, ICON_NONE);
  uiItemR(col, ptr, "size", UI_ITEM_R_SPLIT_EMPTY_NAME, nullptr, ICON_NONE);

  col = uiLayoutColumn(layout, true);
  uiItemR(col, ptr, "use_min", UI_ITEM_R_SPLIT_EMPTY_NAME, nullptr, ICON_NONE);
  sub = uiLayoutColumn(col, false);
  uiLayoutSetActive(sub, RNA_boolean_get(ptr, "use_min"));
  uiItemR(sub, ptr, "min", UI_ITEM_R_SPLIT_EMPTY_NAME, "", ICON_NONE);

  col = uiLayoutColumn(layout, true);
  uiItemR(col, ptr, "use_max", UI_ITEM_R_SPLIT_EMPTY_NAME, nullptr, ICON_NONE);
  sub = uiLayoutColumn(col, false);
  uiLayoutSetActive(sub, RNA_boolean_get(ptr, "use_max"));
  uiItemR(sub, ptr, "max", UI_ITEM_R_SPLIT_EMPTY_NAME, "", ICON_NONE);
}

using namespace blender::realtime_compositor;

class MapValueShaderNode : public ShaderNode {
 public:
  using ShaderNode::ShaderNode;

  void compile(GPUMaterial *material) override
  {
    GPUNodeStack *inputs = get_inputs_array();
    GPUNodeStack *outputs = get_outputs_array();

    const TexMapping &texture_mapping = node_storage(bnode());

    const float use_min = get_use_min();
    const float use_max = get_use_max();

    GPU_stack_link(material,
                   &bnode(),
                   "node_composite_map_value",
                   inputs,
                   outputs,
                   GPU_uniform(texture_mapping.loc),
                   GPU_uniform(texture_mapping.size),
                   GPU_constant(&use_min),
                   GPU_uniform(texture_mapping.min),
                   GPU_constant(&use_max),
                   GPU_uniform(texture_mapping.max));
  }

  bool get_use_min()
  {
    return node_storage(bnode()).flag & TEXMAP_CLIP_MIN;
  }

  bool get_use_max()
  {
    return node_storage(bnode()).flag & TEXMAP_CLIP_MAX;
  }
};

static ShaderNode *get_compositor_shader_node(DNode node)
{
  return new MapValueShaderNode(node);
}

}  // namespace blender::nodes::node_composite_map_value_cc

void register_node_type_cmp_map_value()
{
  namespace file_ns = blender::nodes::node_composite_map_value_cc;

  static bNodeType ntype;

  cmp_node_type_base(&ntype, CMP_NODE_MAP_VALUE, "Map Value", NODE_CLASS_OP_VECTOR);
  ntype.declare = file_ns::cmp_node_map_value_declare;
  ntype.draw_buttons = file_ns::node_composit_buts_map_value;
  ntype.initfunc = file_ns::node_composit_init_map_value;
  node_type_storage(&ntype, "TexMapping", node_free_standard_storage, node_copy_standard_storage);
  ntype.get_compositor_shader_node = file_ns::get_compositor_shader_node;

  nodeRegisterType(&ntype);
}