node_composite_premulkey.cc

Go to the documentation of this file.

/* SPDX-FileCopyrightText: 2006 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */
 
#include "UI_interface.hh"
#include "UI_resources.hh"
 
#include "GPU_material.hh"
 
#include "COM_shader_node.hh"
 
#include "node_composite_util.hh"
 
/* **************** Pre-multiply and Key Alpha Convert ******************** */
 
namespace blender::nodes::node_composite_premulkey_cc {
 
static void cmp_node_premulkey_declare(NodeDeclarationBuilder &b)
{
  b.add_input<decl::Color>("Image")
      .default_value({1.0f, 1.0f, 1.0f, 1.0f})
      .compositor_domain_priority(0);
  b.add_output<decl::Color>("Image");
}
 
static void node_composit_buts_premulkey(uiLayout *layout, bContext * /*C*/, PointerRNA *ptr)
{
  uiItemR(layout, ptr, "mapping", UI_ITEM_R_SPLIT_EMPTY_NAME, "", ICON_NONE);
}
 
using namespace blender::realtime_compositor;
 
class AlphaConvertShaderNode : public ShaderNode {
 public:
  using ShaderNode::ShaderNode;
 
  void compile(GPUMaterial *material) override
  {
    GPUNodeStack *inputs = get_inputs_array();
    GPUNodeStack *outputs = get_outputs_array();
 
    if (get_mode() == 0) {
      GPU_stack_link(material, &bnode(), "color_alpha_premultiply", inputs, outputs);
      return;
    }
 
    GPU_stack_link(material, &bnode(), "color_alpha_unpremultiply", inputs, outputs);
  }
 
  CMPNodeAlphaConvertMode get_mode()
  {
    return (CMPNodeAlphaConvertMode)bnode().custom1;
  }
};
 
static ShaderNode *get_compositor_shader_node(DNode node)
{
  return new AlphaConvertShaderNode(node);
}
 
}  // namespace blender::nodes::node_composite_premulkey_cc
 
void register_node_type_cmp_premulkey()
{
  namespace file_ns = blender::nodes::node_composite_premulkey_cc;
 
  static blender::bke::bNodeType ntype;
 
  cmp_node_type_base(&ntype, CMP_NODE_PREMULKEY, "Alpha Convert", NODE_CLASS_CONVERTER);
  ntype.declare = file_ns::cmp_node_premulkey_declare;
  ntype.draw_buttons = file_ns::node_composit_buts_premulkey;
  ntype.get_compositor_shader_node = file_ns::get_compositor_shader_node;
 
  blender::bke::node_register_type(&ntype);
}