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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_image_cc {
static void sh_node_tex_image_declare(NodeDeclarationBuilder &b)
{
b.is_function_node();
b.add_input<decl::Vector>(N_("Vector")).implicit_field(implicit_field_inputs::position);
b.add_output<decl::Color>(N_("Color")).no_muted_links();
b.add_output<decl::Float>(N_("Alpha")).no_muted_links();
}
static void node_shader_init_tex_image(bNodeTree * /*ntree*/, bNode *node)
{
NodeTexImage *tex = MEM_cnew<NodeTexImage>(__func__);
BKE_texture_mapping_default(&tex->base.tex_mapping, TEXMAP_TYPE_POINT);
BKE_texture_colormapping_default(&tex->base.color_mapping);
BKE_imageuser_default(&tex->iuser);
node->storage = tex;
}
static int node_shader_gpu_tex_image(GPUMaterial *mat,
bNode *node,
bNodeExecData * /*execdata*/,
GPUNodeStack *in,
GPUNodeStack *out)
{
Image *ima = (Image *)node->id;
NodeTexImage *tex = (NodeTexImage *)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;
if (!ima) {
return GPU_stack_link(mat, node, "node_tex_image_empty", in, out);
}
GPUNodeLink **texco = &in[0].link;
if (!*texco) {
*texco = GPU_attribute(mat, CD_AUTO_FROM_NAME, "");
node_shader_gpu_bump_tex_coord(mat, node, texco);
}
node_shader_gpu_tex_mapping(mat, node, in, out);
eGPUSamplerState sampler_state = GPU_SAMPLER_DEFAULT;
switch (tex->extension) {
case SHD_IMAGE_EXTENSION_REPEAT:
sampler_state |= GPU_SAMPLER_REPEAT;
break;
case SHD_IMAGE_EXTENSION_CLIP:
sampler_state |= GPU_SAMPLER_CLAMP_BORDER;
break;
default:
break;
}
if (tex->interpolation != SHD_INTERP_CLOSEST) {
sampler_state |= GPU_SAMPLER_ANISO | GPU_SAMPLER_FILTER;
/* TODO(fclem): For now assume mipmap is always enabled. */
sampler_state |= GPU_SAMPLER_MIPMAP;
}
const bool use_cubic = ELEM(tex->interpolation, SHD_INTERP_CUBIC, SHD_INTERP_SMART);
if (ima->source == IMA_SRC_TILED) {
const char *gpu_node_name = use_cubic ? "node_tex_tile_cubic" : "node_tex_tile_linear";
GPUNodeLink *gpu_image = GPU_image_tiled(mat, ima, iuser, sampler_state);
GPUNodeLink *gpu_image_tile_mapping = GPU_image_tiled_mapping(mat, ima, iuser);
/* UDIM tiles needs a `sampler2DArray` and `sampler1DArray` for tile mapping. */
GPU_stack_link(mat, node, gpu_node_name, in, out, gpu_image, gpu_image_tile_mapping);
}
else {
const char *gpu_node_name = use_cubic ? "node_tex_image_cubic" : "node_tex_image_linear";
switch (tex->projection) {
case SHD_PROJ_FLAT: {
GPUNodeLink *gpu_image = GPU_image(mat, ima, iuser, sampler_state);
GPU_stack_link(mat, node, gpu_node_name, in, out, gpu_image);
break;
}
case SHD_PROJ_BOX: {
gpu_node_name = use_cubic ? "tex_box_sample_cubic" : "tex_box_sample_linear";
GPUNodeLink *vnor, *wnor, *col1, *col2, *col3;
GPUNodeLink *blend = GPU_uniform(&tex->projection_blend);
GPUNodeLink *gpu_image = GPU_image(mat, ima, iuser, sampler_state);
GPU_link(mat, "world_normals_get", &vnor);
GPU_link(mat, "normal_transform_world_to_object", vnor, &wnor);
GPU_link(mat, gpu_node_name, in[0].link, wnor, gpu_image, &col1, &col2, &col3);
GPU_link(mat, "tex_box_blend", wnor, col1, col2, col3, blend, &out[0].link, &out[1].link);
break;
}
case SHD_PROJ_SPHERE: {
/* This projection is known to have a derivative discontinuity.
* Hide it by turning off mipmapping. */
sampler_state &= ~GPU_SAMPLER_MIPMAP;
GPUNodeLink *gpu_image = GPU_image(mat, ima, iuser, sampler_state);
GPU_link(mat, "point_texco_remap_square", *texco, texco);
GPU_link(mat, "point_map_to_sphere", *texco, texco);
GPU_stack_link(mat, node, gpu_node_name, in, out, gpu_image);
break;
}
case SHD_PROJ_TUBE: {
/* This projection is known to have a derivative discontinuity.
* Hide it by turning off mipmapping. */
sampler_state &= ~GPU_SAMPLER_MIPMAP;
GPUNodeLink *gpu_image = GPU_image(mat, ima, iuser, sampler_state);
GPU_link(mat, "point_texco_remap_square", *texco, texco);
GPU_link(mat, "point_map_to_tube", *texco, texco);
GPU_stack_link(mat, node, gpu_node_name, in, out, gpu_image);
break;
}
}
}
if (out[0].hasoutput) {
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 {
/* Output premultiplied alpha depending on alpha socket usage. This makes
* it so that if we blend the color with a transparent shader using alpha as
* a factor, we don't multiply alpha into the color twice. And if we do
* not, then there will be no artifacts from zero alpha areas. */
if (ima->alpha_mode == IMA_ALPHA_PREMUL) {
if (out[1].hasoutput) {
GPU_link(mat, "color_alpha_unpremultiply", out[0].link, &out[0].link);
}
else {
GPU_link(mat, "color_alpha_clear", out[0].link, &out[0].link);
}
}
else {
if (out[1].hasoutput) {
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_image_cc
void register_node_type_sh_tex_image()
{
namespace file_ns = blender::nodes::node_shader_tex_image_cc;
static bNodeType ntype;
sh_node_type_base(&ntype, SH_NODE_TEX_IMAGE, "Image Texture", NODE_CLASS_TEXTURE);
ntype.declare = file_ns::sh_node_tex_image_declare;
node_type_init(&ntype, file_ns::node_shader_init_tex_image);
node_type_storage(
&ntype, "NodeTexImage", node_free_standard_storage, node_copy_standard_storage);
node_type_gpu(&ntype, file_ns::node_shader_gpu_tex_image);
ntype.labelfunc = node_image_label;
node_type_size_preset(&ntype, NODE_SIZE_LARGE);
nodeRegisterType(&ntype);
}
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