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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2005 Blender Foundation. All rights reserved. */
#include "node_shader_util.hh"
#include "IMB_colormanagement.h"
namespace blender::nodes::node_shader_blackbody_cc {
static void node_declare(NodeDeclarationBuilder &b)
{
b.add_input<decl::Float>(N_("Temperature")).default_value(1500.0f).min(800.0f).max(12000.0f);
b.add_output<decl::Color>(N_("Color"));
}
static int node_shader_gpu_blackbody(GPUMaterial *mat,
bNode *node,
bNodeExecData * /*execdata*/,
GPUNodeStack *in,
GPUNodeStack *out)
{
const int size = CM_TABLE + 1;
float *data = static_cast<float *>(MEM_mallocN(sizeof(float) * size * 4, "blackbody texture"));
IMB_colormanagement_blackbody_temperature_to_rgb_table(data, size, 800.0f, 12000.0f);
float layer;
GPUNodeLink *ramp_texture = GPU_color_band(mat, size, data, &layer);
return GPU_stack_link(mat, node, "node_blackbody", in, out, ramp_texture, GPU_constant(&layer));
}
} // namespace blender::nodes::node_shader_blackbody_cc
/* node type definition */
void register_node_type_sh_blackbody()
{
namespace file_ns = blender::nodes::node_shader_blackbody_cc;
static bNodeType ntype;
sh_node_type_base(&ntype, SH_NODE_BLACKBODY, "Blackbody", NODE_CLASS_CONVERTER);
ntype.declare = file_ns::node_declare;
node_type_size_preset(&ntype, NODE_SIZE_MIDDLE);
ntype.gpu_fn = file_ns::node_shader_gpu_blackbody;
nodeRegisterType(&ntype);
}
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