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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2005 Blender Foundation.
* All rights reserved.
*/
#include "../node_shader_util.h"
/* **************** OUTPUT ******************** */
static bNodeSocketTemplate sh_node_tex_environment_in[] = {
{SOCK_VECTOR, N_("Vector"), 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, PROP_NONE, SOCK_HIDE_VALUE},
{-1, ""},
};
static bNodeSocketTemplate sh_node_tex_environment_out[] = {
{SOCK_RGBA, N_("Color"), 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, PROP_NONE, SOCK_NO_INTERNAL_LINK},
{-1, ""},
};
static void node_shader_init_tex_environment(bNodeTree *UNUSED(ntree), bNode *node)
{
NodeTexEnvironment *tex = MEM_callocN(sizeof(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 *UNUSED(execdata),
GPUNodeStack *in,
GPUNodeStack *out)
{
Image *ima = (Image *)node->id;
NodeTexEnvironment *tex = 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 = 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;
if (!ima) {
return GPU_stack_link(mat, node, "node_tex_environment_empty", in, out);
}
if (!in[0].link) {
GPU_link(mat, "node_tex_environment_texco", GPU_builtin(GPU_VIEW_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) {
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;
}
/* node type definition */
void register_node_type_sh_tex_environment(void)
{
static bNodeType ntype;
sh_node_type_base(&ntype, SH_NODE_TEX_ENVIRONMENT, "Environment Texture", NODE_CLASS_TEXTURE, 0);
node_type_socket_templates(&ntype, sh_node_tex_environment_in, sh_node_tex_environment_out);
node_type_init(&ntype, node_shader_init_tex_environment);
node_type_storage(
&ntype, "NodeTexEnvironment", node_free_standard_storage, node_copy_standard_storage);
node_type_gpu(&ntype, node_shader_gpu_tex_environment);
ntype.labelfunc = node_image_label;
node_type_size_preset(&ntype, NODE_SIZE_LARGE);
nodeRegisterType(&ntype);
}
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