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/* 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 "GPU_material.h"
#include "COM_shader_node.hh"
#include "node_composite_util.hh"
/* ******************* Channel Matte Node ********************************* */
namespace blender::nodes::node_composite_channel_matte_cc {
NODE_STORAGE_FUNCS(NodeChroma)
static void cmp_node_channel_matte_declare(NodeDeclarationBuilder &b)
{
b.add_input<decl::Color>(N_("Image"))
.default_value({1.0f, 1.0f, 1.0f, 1.0f})
.compositor_domain_priority(0);
b.add_output<decl::Color>(N_("Image"));
b.add_output<decl::Float>(N_("Matte"));
}
static void node_composit_init_channel_matte(bNodeTree * /*ntree*/, bNode *node)
{
NodeChroma *c = MEM_cnew<NodeChroma>(__func__);
node->storage = c;
c->t1 = 1.0f;
c->t2 = 0.0f;
c->t3 = 0.0f;
c->fsize = 0.0f;
c->fstrength = 0.0f;
c->algorithm = 1; /* Max channel limiting. */
c->channel = 1; /* Limit by red. */
node->custom1 = 1; /* RGB channel. */
node->custom2 = 2; /* Green Channel. */
}
static void node_composit_buts_channel_matte(uiLayout *layout, bContext * /*C*/, PointerRNA *ptr)
{
uiLayout *col, *row;
uiItemL(layout, IFACE_("Color Space:"), ICON_NONE);
row = uiLayoutRow(layout, false);
uiItemR(
row, ptr, "color_space", UI_ITEM_R_SPLIT_EMPTY_NAME | UI_ITEM_R_EXPAND, nullptr, ICON_NONE);
col = uiLayoutColumn(layout, false);
uiItemL(col, IFACE_("Key Channel:"), ICON_NONE);
row = uiLayoutRow(col, false);
uiItemR(row,
ptr,
"matte_channel",
UI_ITEM_R_SPLIT_EMPTY_NAME | UI_ITEM_R_EXPAND,
nullptr,
ICON_NONE);
col = uiLayoutColumn(layout, false);
uiItemR(col, ptr, "limit_method", UI_ITEM_R_SPLIT_EMPTY_NAME, nullptr, ICON_NONE);
if (RNA_enum_get(ptr, "limit_method") == 0) {
uiItemL(col, IFACE_("Limiting Channel:"), ICON_NONE);
row = uiLayoutRow(col, false);
uiItemR(row,
ptr,
"limit_channel",
UI_ITEM_R_SPLIT_EMPTY_NAME | UI_ITEM_R_EXPAND,
nullptr,
ICON_NONE);
}
uiItemR(
col, ptr, "limit_max", UI_ITEM_R_SPLIT_EMPTY_NAME | UI_ITEM_R_SLIDER, nullptr, ICON_NONE);
uiItemR(
col, ptr, "limit_min", UI_ITEM_R_SPLIT_EMPTY_NAME | UI_ITEM_R_SLIDER, nullptr, ICON_NONE);
}
using namespace blender::realtime_compositor;
class ChannelMatteShaderNode : public ShaderNode {
public:
using ShaderNode::ShaderNode;
void compile(GPUMaterial *material) override
{
GPUNodeStack *inputs = get_inputs_array();
GPUNodeStack *outputs = get_outputs_array();
const float color_space = get_color_space();
const float matte_channel = get_matte_channel();
float limit_channels[2];
get_limit_channels(limit_channels);
const float max_limit = get_max_limit();
const float min_limit = get_min_limit();
GPU_stack_link(material,
&bnode(),
"node_composite_channel_matte",
inputs,
outputs,
GPU_constant(&color_space),
GPU_constant(&matte_channel),
GPU_constant(limit_channels),
GPU_uniform(&max_limit),
GPU_uniform(&min_limit));
}
/* 1 -> CMP_NODE_CHANNEL_MATTE_CS_RGB
* 2 -> CMP_NODE_CHANNEL_MATTE_CS_HSV
* 3 -> CMP_NODE_CHANNEL_MATTE_CS_YUV
* 4 -> CMP_NODE_CHANNEL_MATTE_CS_YCC */
int get_color_space()
{
return bnode().custom1;
}
/* Get the index of the channel used to generate the matte. */
int get_matte_channel()
{
return bnode().custom2 - 1;
}
/* Get the index of the channel used to compute the limit value. */
int get_limit_channel()
{
return node_storage(bnode()).channel - 1;
}
/* Get the indices of the channels used to compute the limit value. We always assume the limit
* algorithm is Max, if it is a single limit channel, store it in both limit channels, because
* the maximum of two identical values is the same value. */
void get_limit_channels(float limit_channels[2])
{
if (node_storage(bnode()).algorithm == CMP_NODE_CHANNEL_MATTE_LIMIT_ALGORITHM_MAX) {
/* If the algorithm is Max, store the indices of the other two channels other than the matte
* channel. */
limit_channels[0] = (get_matte_channel() + 1) % 3;
limit_channels[1] = (get_matte_channel() + 2) % 3;
}
else {
/* If the algorithm is Single, store the index of the limit channel in both channels. */
limit_channels[0] = get_limit_channel();
limit_channels[1] = get_limit_channel();
}
}
float get_max_limit()
{
return node_storage(bnode()).t1;
}
float get_min_limit()
{
return node_storage(bnode()).t2;
}
};
static ShaderNode *get_compositor_shader_node(DNode node)
{
return new ChannelMatteShaderNode(node);
}
} // namespace blender::nodes::node_composite_channel_matte_cc
void register_node_type_cmp_channel_matte()
{
namespace file_ns = blender::nodes::node_composite_channel_matte_cc;
static bNodeType ntype;
cmp_node_type_base(&ntype, CMP_NODE_CHANNEL_MATTE, "Channel Key", NODE_CLASS_MATTE);
ntype.declare = file_ns::cmp_node_channel_matte_declare;
ntype.draw_buttons = file_ns::node_composit_buts_channel_matte;
ntype.flag |= NODE_PREVIEW;
ntype.initfunc = file_ns::node_composit_init_channel_matte;
node_type_storage(&ntype, "NodeChroma", node_free_standard_storage, node_copy_standard_storage);
ntype.get_compositor_shader_node = file_ns::get_compositor_shader_node;
nodeRegisterType(&ntype);
}
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