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b9f6d033beecd75398be14419d37d8aab0609812
blender-archive/source/blender/gpu/intern/gpu_codegen.c
Brecht Van Lommel b9f6d033be Eevee: internal support for arbitrary number of volume grids 
This has no user visible impact yet since smoke volumes only support a fixed
set of attributes, but will become important with the new volume object.

For GPU shader compilation, volume grids are now handled separately from
image textures. They are somewhere between a vertex attribute and an image
texture, basically an attribute that is stored as a texture.

Differential Revision: https://developer.blender.org/D6952
2020-03-11 14:59:05 +01:00

1323 lines
42 KiB
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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.
*/
/** \file
* \ingroup gpu
*
* Convert material node-trees to GLSL.
*/
#include "MEM_guardedalloc.h"
#include "DNA_customdata_types.h"
#include "DNA_image_types.h"
#include "BLI_blenlib.h"
#include "BLI_hash_mm2a.h"
#include "BLI_link_utils.h"
#include "BLI_utildefines.h"
#include "BLI_dynstr.h"
#include "BLI_ghash.h"
#include "BLI_threads.h"
#include "PIL_time.h"
#include "BKE_material.h"
#include "GPU_extensions.h"
#include "GPU_glew.h"
#include "GPU_material.h"
#include "GPU_shader.h"
#include "GPU_uniformbuffer.h"
#include "GPU_vertex_format.h"
#include "BLI_sys_types.h" /* for intptr_t support */
#include "gpu_codegen.h"
#include "gpu_material_library.h"
#include "gpu_node_graph.h"
#include <string.h>
#include <stdarg.h>
extern char datatoc_gpu_shader_common_obinfos_lib_glsl[];
extern char datatoc_common_view_lib_glsl[];
/* -------------------- GPUPass Cache ------------------ */
/**
* Internal shader cache: This prevent the shader recompilation / stall when
* using undo/redo AND also allows for GPUPass reuse if the Shader code is the
* same for 2 different Materials. Unused GPUPasses are free by Garbage collection.
*/
/* Only use one linklist that contains the GPUPasses grouped by hash. */
static GPUPass *pass_cache = NULL;
static SpinLock pass_cache_spin;
static uint32_t gpu_pass_hash(const char *frag_gen, const char *defs, ListBase *attributes)
{
BLI_HashMurmur2A hm2a;
BLI_hash_mm2a_init(&hm2a, 0);
BLI_hash_mm2a_add(&hm2a, (uchar *)frag_gen, strlen(frag_gen));
for (GPUMaterialAttribute *attr = attributes->first; attr; attr = attr->next) {
BLI_hash_mm2a_add(&hm2a, (uchar *)attr->name, strlen(attr->name));
}
if (defs) {
BLI_hash_mm2a_add(&hm2a, (uchar *)defs, strlen(defs));
}
return BLI_hash_mm2a_end(&hm2a);
}
/* Search by hash only. Return first pass with the same hash.
* There is hash collision if (pass->next && pass->next->hash == hash) */
static GPUPass *gpu_pass_cache_lookup(uint32_t hash)
{
BLI_spin_lock(&pass_cache_spin);
/* Could be optimized with a Lookup table. */
for (GPUPass *pass = pass_cache; pass; pass = pass->next) {
if (pass->hash == hash) {
BLI_spin_unlock(&pass_cache_spin);
return pass;
}
}
BLI_spin_unlock(&pass_cache_spin);
return NULL;
}
/* Check all possible passes with the same hash. */
static GPUPass *gpu_pass_cache_resolve_collision(GPUPass *pass,
const char *vert,
const char *geom,
const char *frag,
const char *defs,
uint32_t hash)
{
BLI_spin_lock(&pass_cache_spin);
/* Collision, need to strcmp the whole shader. */
for (; pass && (pass->hash == hash); pass = pass->next) {
if ((defs != NULL) && (strcmp(pass->defines, defs) != 0)) { /* Pass */
}
else if ((geom != NULL) && (strcmp(pass->geometrycode, geom) != 0)) { /* Pass */
}
else if ((strcmp(pass->fragmentcode, frag) == 0) && (strcmp(pass->vertexcode, vert) == 0)) {
BLI_spin_unlock(&pass_cache_spin);
return pass;
}
}
BLI_spin_unlock(&pass_cache_spin);
return NULL;
}
/* GLSL code generation */
static void codegen_convert_datatype(DynStr *ds, int from, int to, const char *tmp, int id)
{
char name[1024];
BLI_snprintf(name, sizeof(name), "%s%d", tmp, id);
if (from == to) {
BLI_dynstr_append(ds, name);
}
else if (to == GPU_FLOAT) {
if (from == GPU_VEC4) {
BLI_dynstr_appendf(ds, "dot(%s.rgb, vec3(0.2126, 0.7152, 0.0722))", name);
}
else if (from == GPU_VEC3) {
BLI_dynstr_appendf(ds, "(%s.r + %s.g + %s.b) / 3.0", name, name, name);
}
else if (from == GPU_VEC2) {
BLI_dynstr_appendf(ds, "%s.r", name);
}
}
else if (to == GPU_VEC2) {
if (from == GPU_VEC4) {
BLI_dynstr_appendf(ds, "vec2((%s.r + %s.g + %s.b) / 3.0, %s.a)", name, name, name, name);
}
else if (from == GPU_VEC3) {
BLI_dynstr_appendf(ds, "vec2((%s.r + %s.g + %s.b) / 3.0, 1.0)", name, name, name);
}
else if (from == GPU_FLOAT) {
BLI_dynstr_appendf(ds, "vec2(%s, 1.0)", name);
}
}
else if (to == GPU_VEC3) {
if (from == GPU_VEC4) {
BLI_dynstr_appendf(ds, "%s.rgb", name);
}
else if (from == GPU_VEC2) {
BLI_dynstr_appendf(ds, "vec3(%s.r, %s.r, %s.r)", name, name, name);
}
else if (from == GPU_FLOAT) {
BLI_dynstr_appendf(ds, "vec3(%s, %s, %s)", name, name, name);
}
}
else if (to == GPU_VEC4) {
if (from == GPU_VEC3) {
BLI_dynstr_appendf(ds, "vec4(%s, 1.0)", name);
}
else if (from == GPU_VEC2) {
BLI_dynstr_appendf(ds, "vec4(%s.r, %s.r, %s.r, %s.g)", name, name, name, name);
}
else if (from == GPU_FLOAT) {
BLI_dynstr_appendf(ds, "vec4(%s, %s, %s, 1.0)", name, name, name);
}
}
else if (to == GPU_CLOSURE) {
if (from == GPU_VEC4) {
BLI_dynstr_appendf(ds, "closure_emission(%s.rgb)", name);
}
else if (from == GPU_VEC3) {
BLI_dynstr_appendf(ds, "closure_emission(%s.rgb)", name);
}
else if (from == GPU_VEC2) {
BLI_dynstr_appendf(ds, "closure_emission(%s.rrr)", name);
}
else if (from == GPU_FLOAT) {
BLI_dynstr_appendf(ds, "closure_emission(vec3(%s, %s, %s))", name, name, name);
}
}
else {
BLI_dynstr_append(ds, name);
}
}
static void codegen_print_datatype(DynStr *ds, const eGPUType type, float *data)
{
int i;
BLI_dynstr_appendf(ds, "%s(", gpu_data_type_to_string(type));
for (i = 0; i < type; i++) {
BLI_dynstr_appendf(ds, "%.12f", data[i]);
if (i == type - 1) {
BLI_dynstr_append(ds, ")");
}
else {
BLI_dynstr_append(ds, ", ");
}
}
}
static const char *gpu_builtin_name(eGPUBuiltin builtin)
{
if (builtin == GPU_VIEW_MATRIX) {
return "unfviewmat";
}
else if (builtin == GPU_OBJECT_MATRIX) {
return "unfobmat";
}
else if (builtin == GPU_INVERSE_VIEW_MATRIX) {
return "unfinvviewmat";
}
else if (builtin == GPU_INVERSE_OBJECT_MATRIX) {
return "unfinvobmat";
}
else if (builtin == GPU_LOC_TO_VIEW_MATRIX) {
return "unflocaltoviewmat";
}
else if (builtin == GPU_INVERSE_LOC_TO_VIEW_MATRIX) {
return "unfinvlocaltoviewmat";
}
else if (builtin == GPU_VIEW_POSITION) {
return "varposition";
}
else if (builtin == GPU_WORLD_NORMAL) {
return "varwnormal";
}
else if (builtin == GPU_VIEW_NORMAL) {
return "varnormal";
}
else if (builtin == GPU_OBJECT_COLOR) {
return "unfobjectcolor";
}
else if (builtin == GPU_AUTO_BUMPSCALE) {
return "unfobautobumpscale";
}
else if (builtin == GPU_CAMERA_TEXCO_FACTORS) {
return "unfcameratexfactors";
}
else if (builtin == GPU_PARTICLE_SCALAR_PROPS) {
return "unfparticlescalarprops";
}
else if (builtin == GPU_PARTICLE_LOCATION) {
return "unfparticleco";
}
else if (builtin == GPU_PARTICLE_VELOCITY) {
return "unfparticlevel";
}
else if (builtin == GPU_PARTICLE_ANG_VELOCITY) {
return "unfparticleangvel";
}
else if (builtin == GPU_OBJECT_INFO) {
return "unfobjectinfo";
}
else if (builtin == GPU_BARYCENTRIC_TEXCO) {
return "unfbarycentrictex";
}
else if (builtin == GPU_BARYCENTRIC_DIST) {
return "unfbarycentricdist";
}
else {
return "";
}
}
static void codegen_set_unique_ids(GPUNodeGraph *graph)
{
GPUNode *node;
GPUInput *input;
GPUOutput *output;
int id = 1;
for (node = graph->nodes.first; node; node = node->next) {
for (input = node->inputs.first; input; input = input->next) {
/* set id for unique names of uniform variables */
input->id = id++;
}
for (output = node->outputs.first; output; output = output->next) {
/* set id for unique names of tmp variables storing output */
output->id = id++;
}
}
}
/**
* It will create an UBO for GPUMaterial if there is any GPU_DYNAMIC_UBO.
*/
static int codegen_process_uniforms_functions(GPUMaterial *material,
DynStr *ds,
GPUNodeGraph *graph)
{
GPUNode *node;
GPUInput *input;
const char *name;
int builtins = 0;
ListBase ubo_inputs = {NULL, NULL};
/* Attributes */
for (GPUMaterialAttribute *attr = graph->attributes.first; attr; attr = attr->next) {
BLI_dynstr_appendf(ds, "in %s var%d;\n", gpu_data_type_to_string(attr->gputype), attr->id);
}
/* Textures */
for (GPUMaterialTexture *tex = graph->textures.first; tex; tex = tex->next) {
if (tex->colorband) {
BLI_dynstr_appendf(ds, "uniform sampler1DArray %s;\n", tex->sampler_name);
}
else if (tex->tiled_mapping_name[0]) {
BLI_dynstr_appendf(ds, "uniform sampler2DArray %s;\n", tex->sampler_name);
BLI_dynstr_appendf(ds, "uniform sampler1DArray %s;\n", tex->tiled_mapping_name);
}
else {
BLI_dynstr_appendf(ds, "uniform sampler2D %s;\n", tex->sampler_name);
}
}
/* Volume Grids */
for (GPUMaterialVolumeGrid *grid = graph->volume_grids.first; grid; grid = grid->next) {
BLI_dynstr_appendf(ds, "uniform sampler3D %s;\n", grid->sampler_name);
}
/* Print other uniforms */
for (node = graph->nodes.first; node; node = node->next) {
for (input = node->inputs.first; input; input = input->next) {
if (input->source == GPU_SOURCE_BUILTIN) {
/* only define each builtin uniform/varying once */
if (!(builtins & input->builtin)) {
builtins |= input->builtin;
name = gpu_builtin_name(input->builtin);
if (BLI_str_startswith(name, "unf")) {
BLI_dynstr_appendf(ds, "uniform %s %s;\n", gpu_data_type_to_string(input->type), name);
}
else {
BLI_dynstr_appendf(ds, "in %s %s;\n", gpu_data_type_to_string(input->type), name);
}
}
}
else if (input->source == GPU_SOURCE_STRUCT) {
/* Add other struct here if needed. */
BLI_dynstr_appendf(ds, "Closure strct%d = CLOSURE_DEFAULT;\n", input->id);
}
else if (input->source == GPU_SOURCE_UNIFORM) {
if (!input->link) {
/* We handle the UBOuniforms separately. */
BLI_addtail(&ubo_inputs, BLI_genericNodeN(input));
}
}
else if (input->source == GPU_SOURCE_CONSTANT) {
BLI_dynstr_appendf(
ds, "const %s cons%d = ", gpu_data_type_to_string(input->type), input->id);
codegen_print_datatype(ds, input->type, input->vec);
BLI_dynstr_append(ds, ";\n");
}
}
}
/* Handle the UBO block separately. */
if ((material != NULL) && !BLI_listbase_is_empty(&ubo_inputs)) {
GPU_material_uniform_buffer_create(material, &ubo_inputs);
/* Inputs are sorted */
BLI_dynstr_appendf(ds, "\nlayout (std140) uniform %s {\n", GPU_UBO_BLOCK_NAME);
for (LinkData *link = ubo_inputs.first; link; link = link->next) {
input = link->data;
BLI_dynstr_appendf(ds, "\t%s unf%d;\n", gpu_data_type_to_string(input->type), input->id);
}
BLI_dynstr_append(ds, "};\n");
BLI_freelistN(&ubo_inputs);
}
BLI_dynstr_append(ds, "\n");
return builtins;
}
static void codegen_declare_tmps(DynStr *ds, GPUNodeGraph *graph)
{
GPUNode *node;
GPUOutput *output;
for (node = graph->nodes.first; node; node = node->next) {
/* declare temporary variables for node output storage */
for (output = node->outputs.first; output; output = output->next) {
if (output->type == GPU_CLOSURE) {
BLI_dynstr_appendf(ds, "\tClosure tmp%d;\n", output->id);
}
else {
BLI_dynstr_appendf(ds, "\t%s tmp%d;\n", gpu_data_type_to_string(output->type), output->id);
}
}
}
BLI_dynstr_append(ds, "\n");
}
static void codegen_call_functions(DynStr *ds, GPUNodeGraph *graph, GPUOutput *finaloutput)
{
GPUNode *node;
GPUInput *input;
GPUOutput *output;
for (node = graph->nodes.first; node; node = node->next) {
BLI_dynstr_appendf(ds, "\t%s(", node->name);
for (input = node->inputs.first; input; input = input->next) {
if (input->source == GPU_SOURCE_TEX) {
BLI_dynstr_append(ds, input->texture->sampler_name);
}
else if (input->source == GPU_SOURCE_TEX_TILED_MAPPING) {
BLI_dynstr_append(ds, input->texture->tiled_mapping_name);
}
else if (input->source == GPU_SOURCE_VOLUME_GRID) {
BLI_dynstr_append(ds, input->volume_grid->sampler_name);
}
else if (input->source == GPU_SOURCE_OUTPUT) {
codegen_convert_datatype(
ds, input->link->output->type, input->type, "tmp", input->link->output->id);
}
else if (input->source == GPU_SOURCE_BUILTIN) {
/* TODO(fclem) get rid of that. */
if (input->builtin == GPU_INVERSE_VIEW_MATRIX) {
BLI_dynstr_append(ds, "viewinv");
}
else if (input->builtin == GPU_VIEW_MATRIX) {
BLI_dynstr_append(ds, "viewmat");
}
else if (input->builtin == GPU_CAMERA_TEXCO_FACTORS) {
BLI_dynstr_append(ds, "camtexfac");
}
else if (input->builtin == GPU_LOC_TO_VIEW_MATRIX) {
BLI_dynstr_append(ds, "localtoviewmat");
}
else if (input->builtin == GPU_INVERSE_LOC_TO_VIEW_MATRIX) {
BLI_dynstr_append(ds, "invlocaltoviewmat");
}
else if (input->builtin == GPU_BARYCENTRIC_DIST) {
BLI_dynstr_append(ds, "barycentricDist");
}
else if (input->builtin == GPU_BARYCENTRIC_TEXCO) {
BLI_dynstr_append(ds, "barytexco");
}
else if (input->builtin == GPU_OBJECT_MATRIX) {
BLI_dynstr_append(ds, "objmat");
}
else if (input->builtin == GPU_OBJECT_INFO) {
BLI_dynstr_append(ds, "ObjectInfo");
}
else if (input->builtin == GPU_OBJECT_COLOR) {
BLI_dynstr_append(ds, "ObjectColor");
}
else if (input->builtin == GPU_INVERSE_OBJECT_MATRIX) {
BLI_dynstr_append(ds, "objinv");
}
else if (input->builtin == GPU_VIEW_POSITION) {
BLI_dynstr_append(ds, "viewposition");
}
else if (input->builtin == GPU_VIEW_NORMAL) {
BLI_dynstr_append(ds, "facingnormal");
}
else if (input->builtin == GPU_WORLD_NORMAL) {
BLI_dynstr_append(ds, "facingwnormal");
}
else {
BLI_dynstr_append(ds, gpu_builtin_name(input->builtin));
}
}
else if (input->source == GPU_SOURCE_STRUCT) {
BLI_dynstr_appendf(ds, "strct%d", input->id);
}
else if (input->source == GPU_SOURCE_UNIFORM) {
BLI_dynstr_appendf(ds, "unf%d", input->id);
}
else if (input->source == GPU_SOURCE_CONSTANT) {
BLI_dynstr_appendf(ds, "cons%d", input->id);
}
else if (input->source == GPU_SOURCE_ATTR) {
BLI_dynstr_appendf(ds, "var%d", input->attr->id);
}
BLI_dynstr_append(ds, ", ");
}
for (output = node->outputs.first; output; output = output->next) {
BLI_dynstr_appendf(ds, "tmp%d", output->id);
if (output->next) {
BLI_dynstr_append(ds, ", ");
}
}
BLI_dynstr_append(ds, ");\n");
}
BLI_dynstr_appendf(ds, "\n\treturn tmp%d", finaloutput->id);
BLI_dynstr_append(ds, ";\n");
}
static char *code_generate_fragment(GPUMaterial *material, GPUNodeGraph *graph)
{
DynStr *ds = BLI_dynstr_new();
char *code;
int builtins;
#if 0
BLI_dynstr_append(ds, FUNCTION_PROTOTYPES);
#endif
codegen_set_unique_ids(graph);
builtins = codegen_process_uniforms_functions(material, ds, graph);
if (builtins & (GPU_OBJECT_INFO | GPU_OBJECT_COLOR)) {
BLI_dynstr_append(ds, datatoc_gpu_shader_common_obinfos_lib_glsl);
}
if (builtins & GPU_BARYCENTRIC_TEXCO) {
BLI_dynstr_append(ds, "in vec2 barycentricTexCo;\n");
}
if (builtins & GPU_BARYCENTRIC_DIST) {
BLI_dynstr_append(ds, "flat in vec3 barycentricDist;\n");
}
BLI_dynstr_append(ds, "Closure nodetree_exec(void)\n{\n");
if (builtins & GPU_BARYCENTRIC_TEXCO) {
BLI_dynstr_append(ds, "#ifdef HAIR_SHADER\n");
BLI_dynstr_append(ds,
"\tvec2 barytexco = vec2((fract(barycentricTexCo.y) != 0.0)\n"
"\t ? barycentricTexCo.x\n"
"\t : 1.0 - barycentricTexCo.x,\n"
"\t 0.0);\n");
BLI_dynstr_append(ds, "#else\n");
BLI_dynstr_append(ds, "\tvec2 barytexco = barycentricTexCo;\n");
BLI_dynstr_append(ds, "#endif\n");
}
/* TODO(fclem) get rid of that. */
if (builtins & GPU_VIEW_MATRIX) {
BLI_dynstr_append(ds, "\t#define viewmat ViewMatrix\n");
}
if (builtins & GPU_CAMERA_TEXCO_FACTORS) {
BLI_dynstr_append(ds, "\t#define camtexfac CameraTexCoFactors\n");
}
if (builtins & GPU_OBJECT_MATRIX) {
BLI_dynstr_append(ds, "\t#define objmat ModelMatrix\n");
}
if (builtins & GPU_INVERSE_OBJECT_MATRIX) {
BLI_dynstr_append(ds, "\t#define objinv ModelMatrixInverse\n");
}
if (builtins & GPU_INVERSE_VIEW_MATRIX) {
BLI_dynstr_append(ds, "\t#define viewinv ViewMatrixInverse\n");
}
if (builtins & GPU_LOC_TO_VIEW_MATRIX) {
BLI_dynstr_append(ds, "\t#define localtoviewmat (ViewMatrix * ModelMatrix)\n");
}
if (builtins & GPU_INVERSE_LOC_TO_VIEW_MATRIX) {
BLI_dynstr_append(ds,
"\t#define invlocaltoviewmat (ModelMatrixInverse * ViewMatrixInverse)\n");
}
if (builtins & GPU_VIEW_NORMAL) {
BLI_dynstr_append(ds, "#ifdef HAIR_SHADER\n");
BLI_dynstr_append(ds, "\tvec3 n;\n");
BLI_dynstr_append(ds, "\tworld_normals_get(n);\n");
BLI_dynstr_append(ds, "\tvec3 facingnormal = transform_direction(ViewMatrix, n);\n");
BLI_dynstr_append(ds, "#else\n");
BLI_dynstr_append(ds, "\tvec3 facingnormal = gl_FrontFacing ? viewNormal: -viewNormal;\n");
BLI_dynstr_append(ds, "#endif\n");
}
if (builtins & GPU_WORLD_NORMAL) {
BLI_dynstr_append(ds, "\tvec3 facingwnormal;\n");
if (builtins & GPU_VIEW_NORMAL) {
BLI_dynstr_append(ds, "#ifdef HAIR_SHADER\n");
BLI_dynstr_append(ds, "\tfacingwnormal = n;\n");
BLI_dynstr_append(ds, "#else\n");
BLI_dynstr_append(ds, "\tworld_normals_get(facingwnormal);\n");
BLI_dynstr_append(ds, "#endif\n");
}
else {
BLI_dynstr_append(ds, "\tworld_normals_get(facingwnormal);\n");
}
}
if (builtins & GPU_VIEW_POSITION) {
BLI_dynstr_append(ds, "\t#define viewposition viewPosition\n");
}
codegen_declare_tmps(ds, graph);
codegen_call_functions(ds, graph, graph->outlink->output);
BLI_dynstr_append(ds, "}\n");
/* XXX This cannot go into gpu_shader_material.glsl because main()
* would be parsed and generate error */
/* Old glsl mode compat. */
/* TODO(fclem) This is only used by world shader now. get rid of it? */
BLI_dynstr_append(ds, "#ifndef NODETREE_EXEC\n");
BLI_dynstr_append(ds, "out vec4 fragColor;\n");
BLI_dynstr_append(ds, "void main()\n");
BLI_dynstr_append(ds, "{\n");
BLI_dynstr_append(ds, "\tClosure cl = nodetree_exec();\n");
BLI_dynstr_append(ds,
"\tfragColor = vec4(cl.radiance, "
"saturate(1.0 - avg(cl.transmittance)));\n");
BLI_dynstr_append(ds, "}\n");
BLI_dynstr_append(ds, "#endif\n\n");
/* create shader */
code = BLI_dynstr_get_cstring(ds);
BLI_dynstr_free(ds);
#if 0
if (G.debug & G_DEBUG) {
printf("%s\n", code);
}
#endif
return code;
}
static const char *attr_prefix_get(CustomDataType type)
{
switch (type) {
case CD_ORCO:
return "orco";
case CD_MTFACE:
return "u";
case CD_TANGENT:
return "t";
case CD_MCOL:
return "c";
case CD_AUTO_FROM_NAME:
return "a";
default:
BLI_assert(false && "GPUVertAttr Prefix type not found : This should not happen!");
return "";
}
}
static char *code_generate_vertex(GPUNodeGraph *graph, const char *vert_code, bool use_geom)
{
DynStr *ds = BLI_dynstr_new();
GPUNode *node;
GPUInput *input;
char *code;
int builtins = 0;
/* Hairs uv and col attributes are passed by bufferTextures. */
BLI_dynstr_append(ds,
"#ifdef HAIR_SHADER\n"
"#define DEFINE_ATTR(type, attr) uniform samplerBuffer attr\n"
"#else\n"
"#define DEFINE_ATTR(type, attr) in type attr\n"
"#endif\n");
for (GPUMaterialAttribute *attr = graph->attributes.first; attr; attr = attr->next) {
/* XXX FIXME : see notes in mesh_render_data_create() */
/* NOTE : Replicate changes to mesh_render_data_create() in draw_cache_impl_mesh.c */
if (attr->type == CD_ORCO) {
/* OPTI : orco is computed from local positions, but only if no modifier is present. */
BLI_dynstr_append(ds, datatoc_gpu_shader_common_obinfos_lib_glsl);
BLI_dynstr_append(ds, "DEFINE_ATTR(vec4, orco);\n");
}
else if (attr->name[0] == '\0') {
BLI_dynstr_appendf(ds,
"DEFINE_ATTR(%s, %s);\n",
gpu_data_type_to_string(attr->gputype),
attr_prefix_get(attr->type));
BLI_dynstr_appendf(ds, "#define att%d %s\n", attr->id, attr_prefix_get(attr->type));
}
else {
char attr_safe_name[GPU_MAX_SAFE_ATTRIB_NAME];
GPU_vertformat_safe_attrib_name(attr->name, attr_safe_name, GPU_MAX_SAFE_ATTRIB_NAME);
BLI_dynstr_appendf(ds,
"DEFINE_ATTR(%s, %s%s);\n",
gpu_data_type_to_string(attr->gputype),
attr_prefix_get(attr->type),
attr_safe_name);
BLI_dynstr_appendf(
ds, "#define att%d %s%s\n", attr->id, attr_prefix_get(attr->type), attr_safe_name);
}
BLI_dynstr_appendf(ds,
"out %s var%d%s;\n",
gpu_data_type_to_string(attr->gputype),
attr->id,
use_geom ? "g" : "");
}
for (node = graph->nodes.first; node; node = node->next) {
for (input = node->inputs.first; input; input = input->next) {
if (input->source == GPU_SOURCE_BUILTIN) {
builtins |= input->builtin;
}
}
}
if (builtins & GPU_BARYCENTRIC_TEXCO) {
BLI_dynstr_append(ds, "#ifdef HAIR_SHADER\n");
BLI_dynstr_appendf(ds, "out vec2 barycentricTexCo%s;\n", use_geom ? "g" : "");
BLI_dynstr_append(ds, "#endif\n");
}
if (builtins & GPU_BARYCENTRIC_DIST) {
BLI_dynstr_append(ds, "out vec3 barycentricPosg;\n");
}
BLI_dynstr_append(ds, "\n#define USE_ATTR\n");
/* Prototype, defined later (this is because of matrices definition). */
BLI_dynstr_append(ds, "void pass_attr(in vec3 position);\n");
BLI_dynstr_append(ds, "\n");
if (use_geom) {
/* XXX HACK: Eevee specific. */
char *vert_new, *vert_new2;
vert_new = BLI_str_replaceN(vert_code, "worldPosition", "worldPositiong");
vert_new2 = vert_new;
vert_new = BLI_str_replaceN(vert_new2, "viewPosition", "viewPositiong");
MEM_freeN(vert_new2);
vert_new2 = vert_new;
vert_new = BLI_str_replaceN(vert_new2, "worldNormal", "worldNormalg");
MEM_freeN(vert_new2);
vert_new2 = vert_new;
vert_new = BLI_str_replaceN(vert_new2, "viewNormal", "viewNormalg");
MEM_freeN(vert_new2);
BLI_dynstr_append(ds, vert_new);
MEM_freeN(vert_new);
}
else {
BLI_dynstr_append(ds, vert_code);
}
BLI_dynstr_append(ds, "\n");
BLI_dynstr_append(ds, use_geom ? "RESOURCE_ID_VARYING_GEOM\n" : "RESOURCE_ID_VARYING\n");
/* Prototype because defined later. */
BLI_dynstr_append(ds,
"vec2 hair_get_customdata_vec2(const samplerBuffer);\n"
"vec3 hair_get_customdata_vec3(const samplerBuffer);\n"
"vec4 hair_get_customdata_vec4(const samplerBuffer);\n"
"vec3 hair_get_strand_pos(void);\n"
"int hair_get_base_id(void);\n"
"\n");
BLI_dynstr_append(ds, "void pass_attr(in vec3 position) {\n");
BLI_dynstr_append(ds, use_geom ? "\tPASS_RESOURCE_ID_GEOM\n" : "\tPASS_RESOURCE_ID\n");
BLI_dynstr_append(ds, "#ifdef HAIR_SHADER\n");
if (builtins & GPU_BARYCENTRIC_TEXCO) {
/* To match cycles without breaking into individual segment we encode if we need to invert
* the first component into the second component. We invert if the barycentricTexCo.y
* is NOT 0.0 or 1.0. */
BLI_dynstr_append(ds, "\tint _base_id = hair_get_base_id();\n");
BLI_dynstr_appendf(
ds, "\tbarycentricTexCo%s.x = float((_base_id %% 2) == 1);\n", use_geom ? "g" : "");
BLI_dynstr_appendf(
ds, "\tbarycentricTexCo%s.y = float(((_base_id %% 4) %% 3) > 0);\n", use_geom ? "g" : "");
}
if (builtins & GPU_BARYCENTRIC_DIST) {
BLI_dynstr_append(ds, "\tbarycentricPosg = position;\n");
}
for (GPUMaterialAttribute *attr = graph->attributes.first; attr; attr = attr->next) {
if (attr->type == CD_TANGENT) {
/* Not supported by hairs */
BLI_dynstr_appendf(ds, "\tvar%d%s = vec4(0.0);\n", attr->id, use_geom ? "g" : "");
}
else if (attr->type == CD_ORCO) {
BLI_dynstr_appendf(ds,
"\tvar%d%s = OrcoTexCoFactors[0].xyz + (ModelMatrixInverse * "
"vec4(hair_get_strand_pos(), 1.0)).xyz * OrcoTexCoFactors[1].xyz;\n",
attr->id,
use_geom ? "g" : "");
/* TODO: fix ORCO with modifiers. */
}
else {
BLI_dynstr_appendf(ds,
"\tvar%d%s = hair_get_customdata_%s(att%d);\n",
attr->id,
use_geom ? "g" : "",
gpu_data_type_to_string(attr->gputype),
attr->id);
}
}
BLI_dynstr_append(ds, "#else /* MESH_SHADER */\n");
/* GPU_BARYCENTRIC_TEXCO cannot be computed based on gl_VertexID
* for MESH_SHADER because of indexed drawing. In this case a
* geometry shader is needed. */
if (builtins & GPU_BARYCENTRIC_DIST) {
BLI_dynstr_append(ds, "\tbarycentricPosg = (ModelMatrix * vec4(position, 1.0)).xyz;\n");
}
for (GPUMaterialAttribute *attr = graph->attributes.first; attr; attr = attr->next) {
if (attr->type == CD_TANGENT) { /* silly exception */
BLI_dynstr_appendf(ds,
"\tvar%d%s.xyz = transpose(mat3(ModelMatrixInverse)) * att%d.xyz;\n",
attr->id,
use_geom ? "g" : "",
attr->id);
BLI_dynstr_appendf(ds, "\tvar%d%s.w = att%d.w;\n", attr->id, use_geom ? "g" : "", attr->id);
/* Normalize only if vector is not null. */
BLI_dynstr_appendf(ds,
"\tfloat lvar%d = dot(var%d%s.xyz, var%d%s.xyz);\n",
attr->id,
attr->id,
use_geom ? "g" : "",
attr->id,
use_geom ? "g" : "");
BLI_dynstr_appendf(ds,
"\tvar%d%s.xyz *= (lvar%d > 0.0) ? inversesqrt(lvar%d) : 1.0;\n",
attr->id,
use_geom ? "g" : "",
attr->id,
attr->id);
}
else if (attr->type == CD_ORCO) {
BLI_dynstr_appendf(ds,
"\tvar%d%s = OrcoTexCoFactors[0].xyz + position *"
" OrcoTexCoFactors[1].xyz;\n",
attr->id,
use_geom ? "g" : "");
/* See mesh_create_loop_orco() for explanation. */
BLI_dynstr_appendf(ds,
"\tif (orco.w == 0.0) { var%d%s = orco.xyz * 0.5 + 0.5; }\n",
attr->id,
use_geom ? "g" : "");
}
else {
BLI_dynstr_appendf(ds, "\tvar%d%s = att%d;\n", attr->id, use_geom ? "g" : "", attr->id);
}
}
BLI_dynstr_append(ds, "#endif /* HAIR_SHADER */\n");
BLI_dynstr_append(ds, "}\n");
code = BLI_dynstr_get_cstring(ds);
BLI_dynstr_free(ds);
#if 0
if (G.debug & G_DEBUG) {
printf("%s\n", code);
}
#endif
return code;
}
static char *code_generate_geometry(GPUNodeGraph *graph,
const char *geom_code,
const char *defines)
{
DynStr *ds = BLI_dynstr_new();
GPUNode *node;
GPUInput *input;
char *code;
int builtins = 0;
/* XXX we should not make specific eevee cases here. */
bool is_hair_shader = (strstr(defines, "HAIR_SHADER") != NULL);
/* Create prototype because attributes cannot be declared before layout. */
BLI_dynstr_append(ds, "void pass_attr(in int vert);\n");
BLI_dynstr_append(ds, "void calc_barycentric_distances(vec3 pos0, vec3 pos1, vec3 pos2);\n");
BLI_dynstr_append(ds, "#define USE_ATTR\n");
/* Generate varying declarations. */
for (node = graph->nodes.first; node; node = node->next) {
for (input = node->inputs.first; input; input = input->next) {
if (input->source == GPU_SOURCE_BUILTIN) {
builtins |= input->builtin;
}
}
}
for (GPUMaterialAttribute *attr = graph->attributes.first; attr; attr = attr->next) {
BLI_dynstr_appendf(ds, "in %s var%dg[];\n", gpu_data_type_to_string(attr->gputype), attr->id);
BLI_dynstr_appendf(ds, "out %s var%d;\n", gpu_data_type_to_string(attr->gputype), attr->id);
}
if (builtins & GPU_BARYCENTRIC_TEXCO) {
BLI_dynstr_append(ds, "#ifdef HAIR_SHADER\n");
BLI_dynstr_append(ds, "in vec2 barycentricTexCog[];\n");
BLI_dynstr_append(ds, "#endif\n");
BLI_dynstr_append(ds, "out vec2 barycentricTexCo;\n");
}
if (builtins & GPU_BARYCENTRIC_DIST) {
BLI_dynstr_append(ds, "in vec3 barycentricPosg[];\n");
BLI_dynstr_append(ds, "flat out vec3 barycentricDist;\n");
}
if (geom_code == NULL) {
/* Force geometry usage if GPU_BARYCENTRIC_DIST or GPU_BARYCENTRIC_TEXCO are used.
* Note: GPU_BARYCENTRIC_TEXCO only requires it if the shader is not drawing hairs. */
if ((builtins & (GPU_BARYCENTRIC_DIST | GPU_BARYCENTRIC_TEXCO)) == 0 || is_hair_shader) {
/* Early out */
BLI_dynstr_free(ds);
return NULL;
}
else {
/* Force geom shader usage */
/* TODO put in external file. */
BLI_dynstr_append(ds, "layout(triangles) in;\n");
BLI_dynstr_append(ds, "layout(triangle_strip, max_vertices=3) out;\n");
BLI_dynstr_append(ds, "in vec3 worldPositiong[];\n");
BLI_dynstr_append(ds, "in vec3 viewPositiong[];\n");
BLI_dynstr_append(ds, "in vec3 worldNormalg[];\n");
BLI_dynstr_append(ds, "in vec3 viewNormalg[];\n");
BLI_dynstr_append(ds, "out vec3 worldPosition;\n");
BLI_dynstr_append(ds, "out vec3 viewPosition;\n");
BLI_dynstr_append(ds, "out vec3 worldNormal;\n");
BLI_dynstr_append(ds, "out vec3 viewNormal;\n");
BLI_dynstr_append(ds, datatoc_common_view_lib_glsl);
BLI_dynstr_append(ds, "void main(){\n");
if (builtins & GPU_BARYCENTRIC_DIST) {
BLI_dynstr_append(ds,
"\tcalc_barycentric_distances(barycentricPosg[0], barycentricPosg[1], "
"barycentricPosg[2]);\n");
}
for (int i = 0; i < 3; i++) {
BLI_dynstr_appendf(ds, "\tgl_Position = gl_in[%d].gl_Position;\n", i);
BLI_dynstr_appendf(ds, "\tgl_ClipDistance[0] = gl_in[%d].gl_ClipDistance[0];\n", i);
BLI_dynstr_appendf(ds, "\tpass_attr(%d);\n", i);
BLI_dynstr_append(ds, "\tEmitVertex();\n");
}
BLI_dynstr_append(ds, "}\n");
}
}
else {
BLI_dynstr_append(ds, geom_code);
}
if (builtins & GPU_BARYCENTRIC_DIST) {
BLI_dynstr_append(ds, "void calc_barycentric_distances(vec3 pos0, vec3 pos1, vec3 pos2) {\n");
BLI_dynstr_append(ds, "\tvec3 edge21 = pos2 - pos1;\n");
BLI_dynstr_append(ds, "\tvec3 edge10 = pos1 - pos0;\n");
BLI_dynstr_append(ds, "\tvec3 edge02 = pos0 - pos2;\n");
BLI_dynstr_append(ds, "\tvec3 d21 = normalize(edge21);\n");
BLI_dynstr_append(ds, "\tvec3 d10 = normalize(edge10);\n");
BLI_dynstr_append(ds, "\tvec3 d02 = normalize(edge02);\n");
BLI_dynstr_append(ds, "\tfloat d = dot(d21, edge02);\n");
BLI_dynstr_append(ds, "\tbarycentricDist.x = sqrt(dot(edge02, edge02) - d * d);\n");
BLI_dynstr_append(ds, "\td = dot(d02, edge10);\n");
BLI_dynstr_append(ds, "\tbarycentricDist.y = sqrt(dot(edge10, edge10) - d * d);\n");
BLI_dynstr_append(ds, "\td = dot(d10, edge21);\n");
BLI_dynstr_append(ds, "\tbarycentricDist.z = sqrt(dot(edge21, edge21) - d * d);\n");
BLI_dynstr_append(ds, "}\n");
}
BLI_dynstr_append(ds, "RESOURCE_ID_VARYING\n");
/* Generate varying assignments. */
BLI_dynstr_append(ds, "void pass_attr(in int vert) {\n");
BLI_dynstr_append(ds, "\tPASS_RESOURCE_ID(vert)\n");
/* XXX HACK: Eevee specific. */
if (geom_code == NULL) {
BLI_dynstr_append(ds, "\tworldPosition = worldPositiong[vert];\n");
BLI_dynstr_append(ds, "\tviewPosition = viewPositiong[vert];\n");
BLI_dynstr_append(ds, "\tworldNormal = worldNormalg[vert];\n");
BLI_dynstr_append(ds, "\tviewNormal = viewNormalg[vert];\n");
}
if (builtins & GPU_BARYCENTRIC_TEXCO) {
BLI_dynstr_append(ds, "#ifdef HAIR_SHADER\n");
BLI_dynstr_append(ds, "\tbarycentricTexCo = barycentricTexCog[vert];\n");
BLI_dynstr_append(ds, "#else\n");
BLI_dynstr_append(ds, "\tbarycentricTexCo.x = float((vert % 3) == 0);\n");
BLI_dynstr_append(ds, "\tbarycentricTexCo.y = float((vert % 3) == 1);\n");
BLI_dynstr_append(ds, "#endif\n");
}
for (GPUMaterialAttribute *attr = graph->attributes.first; attr; attr = attr->next) {
/* TODO let shader choose what to do depending on what the attribute is. */
BLI_dynstr_appendf(ds, "\tvar%d = var%dg[vert];\n", attr->id, attr->id);
}
BLI_dynstr_append(ds, "}\n");
code = BLI_dynstr_get_cstring(ds);
BLI_dynstr_free(ds);
return code;
}
GPUShader *GPU_pass_shader_get(GPUPass *pass)
{
return pass->shader;
}
/* Pass create/free */
static bool gpu_pass_is_valid(GPUPass *pass)
{
/* Shader is not null if compilation is successful. */
return (pass->compiled == false || pass->shader != NULL);
}
GPUPass *GPU_generate_pass(GPUMaterial *material,
GPUNodeGraph *graph,
const char *vert_code,
const char *geom_code,
const char *frag_lib,
const char *defines)
{
/* Prune the unused nodes and extract attributes before compiling so the
* generated VBOs are ready to accept the future shader. */
gpu_node_graph_prune_unused(graph);
/* generate code */
char *fragmentgen = code_generate_fragment(material, graph);
/* Cache lookup: Reuse shaders already compiled */
uint32_t hash = gpu_pass_hash(fragmentgen, defines, &graph->attributes);
GPUPass *pass_hash = gpu_pass_cache_lookup(hash);
if (pass_hash && (pass_hash->next == NULL || pass_hash->next->hash != hash)) {
/* No collision, just return the pass. */
MEM_freeN(fragmentgen);
if (!gpu_pass_is_valid(pass_hash)) {
/* Shader has already been created but failed to compile. */
return NULL;
}
pass_hash->refcount += 1;
return pass_hash;
}
/* Either the shader is not compiled or there is a hash collision...
* continue generating the shader strings. */
GSet *used_libraries = gpu_material_used_libraries(material);
char *tmp = gpu_material_library_generate_code(used_libraries, frag_lib);
char *geometrycode = code_generate_geometry(graph, geom_code, defines);
char *vertexcode = code_generate_vertex(graph, vert_code, (geometrycode != NULL));
char *fragmentcode = BLI_strdupcat(tmp, fragmentgen);
MEM_freeN(fragmentgen);
MEM_freeN(tmp);
GPUPass *pass = NULL;
if (pass_hash) {
/* Cache lookup: Reuse shaders already compiled */
pass = gpu_pass_cache_resolve_collision(
pass_hash, vertexcode, geometrycode, fragmentcode, defines, hash);
}
if (pass) {
MEM_SAFE_FREE(vertexcode);
MEM_SAFE_FREE(fragmentcode);
MEM_SAFE_FREE(geometrycode);
/* Cache hit. Reuse the same GPUPass and GPUShader. */
if (!gpu_pass_is_valid(pass)) {
/* Shader has already been created but failed to compile. */
return NULL;
}
pass->refcount += 1;
}
else {
/* We still create a pass even if shader compilation
* fails to avoid trying to compile again and again. */
pass = MEM_callocN(sizeof(GPUPass), "GPUPass");
pass->shader = NULL;
pass->refcount = 1;
pass->hash = hash;
pass->vertexcode = vertexcode;
pass->fragmentcode = fragmentcode;
pass->geometrycode = geometrycode;
pass->defines = (defines) ? BLI_strdup(defines) : NULL;
pass->compiled = false;
BLI_spin_lock(&pass_cache_spin);
if (pass_hash != NULL) {
/* Add after the first pass having the same hash. */
pass->next = pass_hash->next;
pass_hash->next = pass;
}
else {
/* No other pass have same hash, just prepend to the list. */
BLI_LINKS_PREPEND(pass_cache, pass);
}
BLI_spin_unlock(&pass_cache_spin);
}
return pass;
}
static int count_active_texture_sampler(GPUShader *shader, char *source)
{
char *code = source;
/* Remember this is per stage. */
GSet *sampler_ids = BLI_gset_int_new(__func__);
int num_samplers = 0;
while ((code = strstr(code, "uniform "))) {
/* Move past "uniform". */
code += 7;
/* Skip following spaces. */
while (*code == ' ') {
code++;
}
/* Skip "i" from potential isamplers. */
if (*code == 'i') {
code++;
}
/* Skip following spaces. */
if (BLI_str_startswith(code, "sampler")) {
/* Move past "uniform". */
code += 7;
/* Skip sampler type suffix. */
while (*code != ' ' && *code != '\0') {
code++;
}
/* Skip following spaces. */
while (*code == ' ') {
code++;
}
if (*code != '\0') {
char sampler_name[64];
code = gpu_str_skip_token(code, sampler_name, sizeof(sampler_name));
int id = GPU_shader_get_uniform_ensure(shader, sampler_name);
if (id == -1) {
continue;
}
/* Catch duplicates. */
if (BLI_gset_add(sampler_ids, POINTER_FROM_INT(id))) {
num_samplers++;
}
}
}
}
BLI_gset_free(sampler_ids, NULL);
return num_samplers;
}
static bool gpu_pass_shader_validate(GPUPass *pass, GPUShader *shader)
{
if (shader == NULL) {
return false;
}
/* NOTE: The only drawback of this method is that it will count a sampler
* used in the fragment shader and only declared (but not used) in the vertex
* shader as used by both. But this corner case is not happening for now. */
int vert_samplers_len = count_active_texture_sampler(shader, pass->vertexcode);
int frag_samplers_len = count_active_texture_sampler(shader, pass->fragmentcode);
int total_samplers_len = vert_samplers_len + frag_samplers_len;
/* Validate against opengl limit. */
if ((frag_samplers_len > GPU_max_textures_frag()) ||
(vert_samplers_len > GPU_max_textures_vert())) {
return false;
}
if (pass->geometrycode) {
int geom_samplers_len = count_active_texture_sampler(shader, pass->geometrycode);
total_samplers_len += geom_samplers_len;
if (geom_samplers_len > GPU_max_textures_geom()) {
return false;
}
}
return (total_samplers_len <= GPU_max_textures());
}
bool GPU_pass_compile(GPUPass *pass, const char *shname)
{
bool success = true;
if (!pass->compiled) {
GPUShader *shader = GPU_shader_create(
pass->vertexcode, pass->fragmentcode, pass->geometrycode, NULL, pass->defines, shname);
/* NOTE: Some drivers / gpu allows more active samplers than the opengl limit.
* We need to make sure to count active samplers to avoid undefined behavior. */
if (!gpu_pass_shader_validate(pass, shader)) {
success = false;
if (shader != NULL) {
fprintf(stderr, "GPUShader: error: too many samplers in shader.\n");
GPU_shader_free(shader);
shader = NULL;
}
}
else if (!BLI_thread_is_main() && GPU_context_local_shaders_workaround()) {
pass->binary.content = GPU_shader_get_binary(
shader, &pass->binary.format, &pass->binary.len);
GPU_shader_free(shader);
shader = NULL;
}
pass->shader = shader;
pass->compiled = true;
}
else if (pass->binary.content && BLI_thread_is_main()) {
pass->shader = GPU_shader_load_from_binary(
pass->binary.content, pass->binary.format, pass->binary.len, shname);
MEM_SAFE_FREE(pass->binary.content);
}
return success;
}
void GPU_pass_release(GPUPass *pass)
{
BLI_assert(pass->refcount > 0);
pass->refcount--;
}
static void gpu_pass_free(GPUPass *pass)
{
BLI_assert(pass->refcount == 0);
if (pass->shader) {
GPU_shader_free(pass->shader);
}
MEM_SAFE_FREE(pass->fragmentcode);
MEM_SAFE_FREE(pass->geometrycode);
MEM_SAFE_FREE(pass->vertexcode);
MEM_SAFE_FREE(pass->defines);
if (pass->binary.content) {
MEM_freeN(pass->binary.content);
}
MEM_freeN(pass);
}
void GPU_pass_cache_garbage_collect(void)
{
static int lasttime = 0;
const int shadercollectrate = 60; /* hardcoded for now. */
int ctime = (int)PIL_check_seconds_timer();
if (ctime < shadercollectrate + lasttime) {
return;
}
lasttime = ctime;
BLI_spin_lock(&pass_cache_spin);
GPUPass *next, **prev_pass = &pass_cache;
for (GPUPass *pass = pass_cache; pass; pass = next) {
next = pass->next;
if (pass->refcount == 0) {
/* Remove from list */
*prev_pass = next;
gpu_pass_free(pass);
}
else {
prev_pass = &pass->next;
}
}
BLI_spin_unlock(&pass_cache_spin);
}
void GPU_pass_cache_init(void)
{
BLI_spin_init(&pass_cache_spin);
}
void GPU_pass_cache_free(void)
{
BLI_spin_lock(&pass_cache_spin);
while (pass_cache) {
GPUPass *next = pass_cache->next;
gpu_pass_free(pass_cache);
pass_cache = next;
}
BLI_spin_unlock(&pass_cache_spin);
BLI_spin_end(&pass_cache_spin);
}
/* Module */
void gpu_codegen_init(void)
{
}
void gpu_codegen_exit(void)
{
BKE_material_defaults_free_gpu();
GPU_shader_free_builtin_shaders();
}
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