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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2005 Blender Foundation. All rights reserved. */
#include "node_shader_util.hh"
namespace blender::nodes::node_shader_tex_environment_cc {
static void node_declare(NodeDeclarationBuilder &b)
{
b.add_input<decl::Vector>(N_("Vector")).hide_value();
b.add_output<decl::Color>(N_("Color")).no_muted_links();
}
static void node_shader_init_tex_environment(bNodeTree * /*ntree*/, bNode *node)
{
NodeTexEnvironment *tex = MEM_cnew<NodeTexEnvironment>("NodeTexEnvironment");
BKE_texture_mapping_default(&tex->base.tex_mapping, TEXMAP_TYPE_POINT);
BKE_texture_colormapping_default(&tex->base.color_mapping);
tex->projection = SHD_PROJ_EQUIRECTANGULAR;
BKE_imageuser_default(&tex->iuser);
node->storage = tex;
}
static int node_shader_gpu_tex_environment(GPUMaterial *mat,
bNode *node,
bNodeExecData * /*execdata*/,
GPUNodeStack *in,
GPUNodeStack *out)
{
Image *ima = (Image *)node->id;
NodeTexEnvironment *tex = (NodeTexEnvironment *)node->storage;
/* We get the image user from the original node, since GPU image keeps
* a pointer to it and the dependency refreshes the original. */
bNode *node_original = node->original ? node->original : node;
NodeTexImage *tex_original = (NodeTexImage *)node_original->storage;
ImageUser *iuser = &tex_original->iuser;
eGPUSamplerState sampler = GPU_SAMPLER_REPEAT | GPU_SAMPLER_ANISO | GPU_SAMPLER_FILTER;
/* TODO(@fclem): For now assume mipmap is always enabled. */
if (true) {
sampler |= GPU_SAMPLER_MIPMAP;
}
GPUNodeLink *outalpha;
/* HACK(@fclem): For lookdev mode: do not compile an empty environment and just create an empty
* texture entry point. We manually bind to it after #DRW_shgroup_add_material_resources(). */
if (!ima && !GPU_material_flag_get(mat, GPU_MATFLAG_LOOKDEV_HACK)) {
return GPU_stack_link(mat, node, "node_tex_environment_empty", in, out);
}
if (!in[0].link) {
GPU_link(mat, "node_tex_coord_position", &in[0].link);
node_shader_gpu_bump_tex_coord(mat, node, &in[0].link);
}
node_shader_gpu_tex_mapping(mat, node, in, out);
/* Compute texture coordinate. */
if (tex->projection == SHD_PROJ_EQUIRECTANGULAR) {
GPU_link(mat, "node_tex_environment_equirectangular", in[0].link, &in[0].link);
/* To fix pole issue we clamp the v coordinate. */
sampler &= ~GPU_SAMPLER_REPEAT_T;
/* Force the highest mipmap and don't do anisotropic filtering.
* This is to fix the artifact caused by derivatives discontinuity. */
sampler &= ~(GPU_SAMPLER_MIPMAP | GPU_SAMPLER_ANISO);
}
else {
GPU_link(mat, "node_tex_environment_mirror_ball", in[0].link, &in[0].link);
/* Fix pole issue. */
sampler &= ~GPU_SAMPLER_REPEAT;
}
const char *gpu_fn;
static const char *names[] = {
"node_tex_image_linear",
"node_tex_image_cubic",
};
switch (tex->interpolation) {
case SHD_INTERP_LINEAR:
gpu_fn = names[0];
break;
case SHD_INTERP_CLOSEST:
sampler &= ~(GPU_SAMPLER_FILTER | GPU_SAMPLER_MIPMAP);
gpu_fn = names[0];
break;
default:
gpu_fn = names[1];
break;
}
/* Sample texture with correct interpolation. */
GPU_link(mat, gpu_fn, in[0].link, GPU_image(mat, ima, iuser, sampler), &out[0].link, &outalpha);
if (out[0].hasoutput && ima) {
if (ELEM(ima->alpha_mode, IMA_ALPHA_IGNORE, IMA_ALPHA_CHANNEL_PACKED) ||
IMB_colormanagement_space_name_is_data(ima->colorspace_settings.name)) {
/* Don't let alpha affect color output in these cases. */
GPU_link(mat, "color_alpha_clear", out[0].link, &out[0].link);
}
else {
/* Always output with premultiplied alpha. */
if (ima->alpha_mode == IMA_ALPHA_PREMUL) {
GPU_link(mat, "color_alpha_clear", out[0].link, &out[0].link);
}
else {
GPU_link(mat, "color_alpha_premultiply", out[0].link, &out[0].link);
}
}
}
return true;
}
} // namespace blender::nodes::node_shader_tex_environment_cc
/* node type definition */
void register_node_type_sh_tex_environment()
{
namespace file_ns = blender::nodes::node_shader_tex_environment_cc;
static bNodeType ntype;
sh_node_type_base(&ntype, SH_NODE_TEX_ENVIRONMENT, "Environment Texture", NODE_CLASS_TEXTURE);
ntype.declare = file_ns::node_declare;
ntype.initfunc = file_ns::node_shader_init_tex_environment;
node_type_storage(
&ntype, "NodeTexEnvironment", node_free_standard_storage, node_copy_standard_storage);
ntype.gpu_fn = file_ns::node_shader_gpu_tex_environment;
ntype.labelfunc = node_image_label;
node_type_size_preset(&ntype, NODE_SIZE_LARGE);
nodeRegisterType(&ntype);
}
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