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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"
/* ******************* Color Balance ********************************* */
/* 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 * /*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 * /*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;
}
}
namespace blender::nodes::node_composite_colorbalance_cc {
NODE_STORAGE_FUNCS(NodeColorBalance)
static void cmp_node_colorbalance_declare(NodeDeclarationBuilder &b)
{
b.add_input<decl::Float>(N_("Fac"))
.default_value(1.0f)
.min(0.0f)
.max(1.0f)
.subtype(PROP_FACTOR)
.compositor_domain_priority(1);
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"));
}
static void node_composit_init_colorbalance(bNodeTree * /*ntree*/, bNode *node)
{
NodeColorBalance *n = MEM_cnew<NodeColorBalance>(__func__);
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;
}
static void node_composit_buts_colorbalance(uiLayout *layout, bContext * /*C*/, PointerRNA *ptr)
{
uiLayout *split, *col, *row;
uiItemR(layout, ptr, "correction_method", UI_ITEM_R_SPLIT_EMPTY_NAME, nullptr, ICON_NONE);
if (RNA_enum_get(ptr, "correction_method") == CMP_NODE_COLOR_BALANCE_LGG) {
split = uiLayoutSplit(layout, 0.0f, false);
col = uiLayoutColumn(split, false);
uiTemplateColorPicker(col, ptr, "lift", true, true, false, true);
row = uiLayoutRow(col, false);
uiItemR(row, ptr, "lift", UI_ITEM_R_SPLIT_EMPTY_NAME, nullptr, ICON_NONE);
col = uiLayoutColumn(split, false);
uiTemplateColorPicker(col, ptr, "gamma", true, true, true, true);
row = uiLayoutRow(col, false);
uiItemR(row, ptr, "gamma", UI_ITEM_R_SPLIT_EMPTY_NAME, nullptr, ICON_NONE);
col = uiLayoutColumn(split, false);
uiTemplateColorPicker(col, ptr, "gain", true, true, true, true);
row = uiLayoutRow(col, false);
uiItemR(row, ptr, "gain", UI_ITEM_R_SPLIT_EMPTY_NAME, nullptr, ICON_NONE);
}
else {
split = uiLayoutSplit(layout, 0.0f, false);
col = uiLayoutColumn(split, false);
uiTemplateColorPicker(col, ptr, "offset", true, true, false, true);
row = uiLayoutRow(col, false);
uiItemR(row, ptr, "offset", UI_ITEM_R_SPLIT_EMPTY_NAME, nullptr, ICON_NONE);
uiItemR(col, ptr, "offset_basis", UI_ITEM_R_SPLIT_EMPTY_NAME, nullptr, ICON_NONE);
col = uiLayoutColumn(split, false);
uiTemplateColorPicker(col, ptr, "power", true, true, false, true);
row = uiLayoutRow(col, false);
uiItemR(row, ptr, "power", UI_ITEM_R_SPLIT_EMPTY_NAME, nullptr, ICON_NONE);
col = uiLayoutColumn(split, false);
uiTemplateColorPicker(col, ptr, "slope", true, true, false, true);
row = uiLayoutRow(col, false);
uiItemR(row, ptr, "slope", UI_ITEM_R_SPLIT_EMPTY_NAME, nullptr, ICON_NONE);
}
}
static void node_composit_buts_colorbalance_ex(uiLayout *layout, bContext * /*C*/, PointerRNA *ptr)
{
uiItemR(layout, ptr, "correction_method", UI_ITEM_R_SPLIT_EMPTY_NAME, nullptr, ICON_NONE);
if (RNA_enum_get(ptr, "correction_method") == CMP_NODE_COLOR_BALANCE_LGG) {
uiTemplateColorPicker(layout, ptr, "lift", true, true, false, true);
uiItemR(layout, ptr, "lift", UI_ITEM_R_SPLIT_EMPTY_NAME, nullptr, ICON_NONE);
uiTemplateColorPicker(layout, ptr, "gamma", true, true, true, true);
uiItemR(layout, ptr, "gamma", UI_ITEM_R_SPLIT_EMPTY_NAME, nullptr, ICON_NONE);
uiTemplateColorPicker(layout, ptr, "gain", true, true, true, true);
uiItemR(layout, ptr, "gain", UI_ITEM_R_SPLIT_EMPTY_NAME, nullptr, ICON_NONE);
}
else {
uiTemplateColorPicker(layout, ptr, "offset", true, true, false, true);
uiItemR(layout, ptr, "offset", UI_ITEM_R_SPLIT_EMPTY_NAME, nullptr, ICON_NONE);
uiTemplateColorPicker(layout, ptr, "power", true, true, false, true);
uiItemR(layout, ptr, "power", UI_ITEM_R_SPLIT_EMPTY_NAME, nullptr, ICON_NONE);
uiTemplateColorPicker(layout, ptr, "slope", true, true, false, true);
uiItemR(layout, ptr, "slope", UI_ITEM_R_SPLIT_EMPTY_NAME, nullptr, ICON_NONE);
}
}
using namespace blender::realtime_compositor;
class ColorBalanceShaderNode : public ShaderNode {
public:
using ShaderNode::ShaderNode;
void compile(GPUMaterial *material) override
{
GPUNodeStack *inputs = get_inputs_array();
GPUNodeStack *outputs = get_outputs_array();
const NodeColorBalance &node_color_balance = node_storage(bnode());
if (get_color_balance_method() == CMP_NODE_COLOR_BALANCE_LGG) {
GPU_stack_link(material,
&bnode(),
"node_composite_color_balance_lgg",
inputs,
outputs,
GPU_uniform(node_color_balance.lift),
GPU_uniform(node_color_balance.gamma),
GPU_uniform(node_color_balance.gain));
return;
}
GPU_stack_link(material,
&bnode(),
"node_composite_color_balance_asc_cdl",
inputs,
outputs,
GPU_uniform(node_color_balance.offset),
GPU_uniform(node_color_balance.power),
GPU_uniform(node_color_balance.slope),
GPU_uniform(&node_color_balance.offset_basis));
}
CMPNodeColorBalanceMethod get_color_balance_method()
{
return (CMPNodeColorBalanceMethod)bnode().custom1;
}
};
static ShaderNode *get_compositor_shader_node(DNode node)
{
return new ColorBalanceShaderNode(node);
}
} // namespace blender::nodes::node_composite_colorbalance_cc
void register_node_type_cmp_colorbalance()
{
namespace file_ns = blender::nodes::node_composite_colorbalance_cc;
static bNodeType ntype;
cmp_node_type_base(&ntype, CMP_NODE_COLORBALANCE, "Color Balance", NODE_CLASS_OP_COLOR);
ntype.declare = file_ns::cmp_node_colorbalance_declare;
ntype.draw_buttons = file_ns::node_composit_buts_colorbalance;
ntype.draw_buttons_ex = file_ns::node_composit_buts_colorbalance_ex;
node_type_size(&ntype, 400, 200, 400);
ntype.initfunc = file_ns::node_composit_init_colorbalance;
node_type_storage(
&ntype, "NodeColorBalance", 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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