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/*
* Copyright 2016, Blender Foundation.
*
* 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.
*
* Contributor(s): Blender Institute
*
*/
/** \file eevee.c
* \ingroup DNA
*/
#include "DRW_render.h"
#include "BLI_dynstr.h"
#include "eevee.h"
#include "eevee_private.h"
#include "eevee_lut.h"
#define EEVEE_ENGINE "BLENDER_EEVEE"
/* *********** STATIC *********** */
static struct {
struct GPUShader *default_lit;
struct GPUShader *depth_sh;
struct GPUShader *tonemap;
struct GPUShader *shadow_sh;
struct GPUTexture *ltc_mat;
struct GPUTexture *ltc_mag;
float camera_pos[3];
} e_data = {NULL}; /* Engine data */
extern char datatoc_ltc_lib_glsl[];
extern char datatoc_bsdf_common_lib_glsl[];
extern char datatoc_bsdf_direct_lib_glsl[];
extern char datatoc_lit_surface_frag_glsl[];
extern char datatoc_lit_surface_vert_glsl[];
extern char datatoc_tonemap_frag_glsl[];
extern char datatoc_shadow_frag_glsl[];
extern char datatoc_shadow_geom_glsl[];
extern char datatoc_shadow_vert_glsl[];
/* *********** FUNCTIONS *********** */
static void EEVEE_engine_init(void *vedata)
{
EEVEE_TextureList *txl = ((EEVEE_Data *)vedata)->txl;
EEVEE_FramebufferList *fbl = ((EEVEE_Data *)vedata)->fbl;
EEVEE_StorageList *stl = ((EEVEE_Data *)vedata)->stl;
DRWFboTexture tex = {&txl->color, DRW_BUF_RGBA_16, DRW_TEX_FILTER};
const float *viewport_size = DRW_viewport_size_get();
DRW_framebuffer_init(&fbl->main,
(int)viewport_size[0], (int)viewport_size[1],
&tex, 1);
if (!e_data.default_lit) {
e_data.depth_sh = DRW_shader_create_3D_depth_only();
}
if (!e_data.default_lit) {
char *lib_str = NULL;
DynStr *ds_vert = BLI_dynstr_new();
BLI_dynstr_append(ds_vert, datatoc_bsdf_common_lib_glsl);
BLI_dynstr_append(ds_vert, datatoc_ltc_lib_glsl);
BLI_dynstr_append(ds_vert, datatoc_bsdf_direct_lib_glsl);
lib_str = BLI_dynstr_get_cstring(ds_vert);
BLI_dynstr_free(ds_vert);
e_data.default_lit = DRW_shader_create_with_lib(datatoc_lit_surface_vert_glsl, NULL, datatoc_lit_surface_frag_glsl, lib_str,
"#define MAX_LIGHT 128\n"
"#define MAX_SHADOW_CUBE 42\n"
"#define MAX_SHADOW_MAP 64\n"
"#define MAX_SHADOW_CASCADE 8\n"
"#define MAX_CASCADE_NUM 4\n");
MEM_freeN(lib_str);
}
if (!e_data.shadow_sh) {
e_data.shadow_sh = DRW_shader_create(datatoc_shadow_vert_glsl, datatoc_shadow_geom_glsl, datatoc_shadow_frag_glsl, NULL);
}
if (!e_data.tonemap) {
e_data.tonemap = DRW_shader_create_fullscreen(datatoc_tonemap_frag_glsl, NULL);
}
if (!e_data.ltc_mat) {
e_data.ltc_mat = DRW_texture_create_2D(64, 64, DRW_TEX_RGBA_16, DRW_TEX_FILTER, ltc_mat_ggx);
}
if (!e_data.ltc_mag) {
e_data.ltc_mag = DRW_texture_create_2D(64, 64, DRW_TEX_R_16, DRW_TEX_FILTER, ltc_mag_ggx);
}
if (stl->lamps == NULL) {
EEVEE_lights_init(stl);
}
// EEVEE_lights_update(stl);
{
float viewinvmat[4][4];
DRW_viewport_matrix_get(viewinvmat, DRW_MAT_VIEWINV);
copy_v3_v3(e_data.camera_pos, viewinvmat[3]);
}
}
static void EEVEE_cache_init(void *vedata)
{
EEVEE_PassList *psl = ((EEVEE_Data *)vedata)->psl;
EEVEE_TextureList *txl = ((EEVEE_Data *)vedata)->txl;
EEVEE_StorageList *stl = ((EEVEE_Data *)vedata)->stl;
if (!stl->g_data) {
/* Alloc transient pointers */
stl->g_data = MEM_mallocN(sizeof(g_data), "g_data");
}
{
/* Shadow Pass */
psl->shadow_pass = DRW_pass_create("Shadow Pass", DRW_STATE_WRITE_DEPTH | DRW_STATE_DEPTH_LESS);
stl->g_data->shadow_shgrp = DRW_shgroup_create(e_data.shadow_sh, psl->shadow_pass);
DRW_shgroup_uniform_mat4(stl->g_data->shadow_shgrp, "ShadowMatrix", (float *)stl->lamps->shadowmat);
DRW_shgroup_uniform_int(stl->g_data->shadow_shgrp, "Layer", &stl->lamps->layer, 1);
}
{
psl->depth_pass = DRW_pass_create("Depth Pass", DRW_STATE_WRITE_DEPTH | DRW_STATE_DEPTH_LESS);
stl->g_data->depth_shgrp = DRW_shgroup_create(e_data.depth_sh, psl->depth_pass);
psl->depth_pass_cull = DRW_pass_create("Depth Pass Cull", DRW_STATE_WRITE_DEPTH | DRW_STATE_DEPTH_LESS | DRW_STATE_CULL_BACK);
stl->g_data->depth_shgrp_cull = DRW_shgroup_create(e_data.depth_sh, psl->depth_pass_cull);
}
{
DRWState state = DRW_STATE_WRITE_COLOR | DRW_STATE_WRITE_DEPTH | DRW_STATE_DEPTH_EQUAL;
psl->pass = DRW_pass_create("Default Light Pass", state);
stl->g_data->default_lit_grp = DRW_shgroup_create(e_data.default_lit, psl->pass);
DRW_shgroup_uniform_block(stl->g_data->default_lit_grp, "light_block", stl->light_ubo, 0);
DRW_shgroup_uniform_block(stl->g_data->default_lit_grp, "shadow_block", stl->shadow_ubo, 1);
DRW_shgroup_uniform_int(stl->g_data->default_lit_grp, "light_count", &stl->lamps->num_light, 1);
DRW_shgroup_uniform_vec3(stl->g_data->default_lit_grp, "cameraPos", e_data.camera_pos, 1);
DRW_shgroup_uniform_texture(stl->g_data->default_lit_grp, "ltcMat", e_data.ltc_mat, 0);
DRW_shgroup_uniform_texture(stl->g_data->default_lit_grp, "ltcMag", e_data.ltc_mag, 1);
/* NOTE : Adding Shadow Map textures uniform in EEVEE_cache_finish */
}
{
/* Final pass : Map HDR color to LDR color.
* Write result to the default color buffer */
psl->tonemap = DRW_pass_create("Tone Mapping", DRW_STATE_WRITE_COLOR | DRW_STATE_BLEND);
DRWShadingGroup *grp = DRW_shgroup_create(e_data.tonemap, psl->tonemap);
DRW_shgroup_uniform_buffer(grp, "hdrColorBuf", &txl->color, 0);
struct Batch *geom = DRW_cache_fullscreen_quad_get();
DRW_shgroup_call_add(grp, geom, NULL);
}
EEVEE_lights_cache_init(stl);
}
static void EEVEE_cache_populate(void *vedata, Object *ob)
{
EEVEE_StorageList *stl = ((EEVEE_Data *)vedata)->stl;
if (ob->type == OB_MESH) {
IDProperty *ces_mode_ob = BKE_object_collection_engine_get(ob, COLLECTION_MODE_OBJECT, "");
bool do_cull = BKE_collection_engine_property_value_get_bool(ces_mode_ob, "show_backface_culling");
struct Batch *geom = DRW_cache_mesh_surface_get(ob);
/* Depth Prepass */
DRW_shgroup_call_add((do_cull) ? stl->g_data->depth_shgrp_cull : stl->g_data->depth_shgrp, geom, ob->obmat);
DRW_shgroup_call_add(stl->g_data->default_lit_grp, geom, ob->obmat);
DRW_shgroup_call_add(stl->g_data->shadow_shgrp, geom, ob->obmat);
}
else if (ob->type == OB_LAMP) {
EEVEE_lights_cache_add(stl, ob);
}
}
static void EEVEE_cache_finish(void *vedata)
{
EEVEE_StorageList *stl = ((EEVEE_Data *)vedata)->stl;
EEVEE_TextureList *txl = ((EEVEE_Data *)vedata)->txl;
EEVEE_FramebufferList *fbl = ((EEVEE_Data *)vedata)->fbl;
EEVEE_lights_cache_finish(stl, txl, fbl);
/* Shadows binding */
DRW_shgroup_uniform_texture(stl->g_data->default_lit_grp, "shadowMaps", txl->shadow_depth_map_pool, 2);
DRW_shgroup_uniform_texture(stl->g_data->default_lit_grp, "shadowCubes", txl->shadow_depth_cube_pool, 3);
}
static void EEVEE_draw_scene(void *vedata)
{
EEVEE_PassList *psl = ((EEVEE_Data *)vedata)->psl;
EEVEE_FramebufferList *fbl = ((EEVEE_Data *)vedata)->fbl;
/* Default framebuffer and texture */
DefaultFramebufferList *dfbl = DRW_viewport_framebuffer_list_get();
DefaultTextureList *dtxl = DRW_viewport_texture_list_get();
/* Refresh shadows */
EEVEE_draw_shadows((EEVEE_Data *)vedata);
/* Attach depth to the hdr buffer and bind it */
DRW_framebuffer_texture_detach(dtxl->depth);
DRW_framebuffer_texture_attach(fbl->main, dtxl->depth, 0);
DRW_framebuffer_bind(fbl->main);
/* Clear Depth */
/* TODO do background */
float clearcol[4] = {0.0f, 0.0f, 0.0f, 1.0f};
DRW_framebuffer_clear(true, true, false, clearcol, 1.0f);
DRW_draw_pass(psl->depth_pass);
DRW_draw_pass(psl->depth_pass_cull);
DRW_draw_pass(psl->pass);
/* Restore default framebuffer */
DRW_framebuffer_texture_detach(dtxl->depth);
DRW_framebuffer_texture_attach(dfbl->default_fb, dtxl->depth, 0);
DRW_framebuffer_bind(dfbl->default_fb);
DRW_draw_pass(psl->tonemap);
}
static void EEVEE_engine_free(void)
{
DRW_SHADER_FREE_SAFE(e_data.default_lit);
DRW_SHADER_FREE_SAFE(e_data.shadow_sh);
DRW_SHADER_FREE_SAFE(e_data.tonemap);
DRW_TEXTURE_FREE_SAFE(e_data.ltc_mat);
DRW_TEXTURE_FREE_SAFE(e_data.ltc_mag);
}
static void EEVEE_collection_settings_create(RenderEngine *UNUSED(engine), IDProperty *props)
{
BLI_assert(props &&
props->type == IDP_GROUP &&
props->subtype == IDP_GROUP_SUB_ENGINE_RENDER);
// BKE_collection_engine_property_add_int(props, "high_quality_sphere_lamps", false);
}
static const DrawEngineDataSize EEVEE_data_size = DRW_VIEWPORT_DATA_SIZE(EEVEE_Data);
DrawEngineType draw_engine_eevee_type = {
NULL, NULL,
N_("Eevee"),
&EEVEE_data_size,
&EEVEE_engine_init,
&EEVEE_engine_free,
&EEVEE_cache_init,
&EEVEE_cache_populate,
&EEVEE_cache_finish,
&EEVEE_draw_scene,
NULL//&EEVEE_draw_scene
};
RenderEngineType viewport_eevee_type = {
NULL, NULL,
EEVEE_ENGINE, N_("Eevee"), RE_INTERNAL | RE_USE_OGL_PIPELINE,
NULL, NULL, NULL, NULL, NULL, NULL, &EEVEE_collection_settings_create,
&draw_engine_eevee_type,
{NULL, NULL, NULL}
};
#undef EEVEE_ENGINE
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