void EEVEE_occlusion_cache_init(EEVEE_ViewLayerData *sldata, EEVEE_Data *vedata)
{
EEVEE_PassList *psl = vedata->psl;
EEVEE_StorageList *stl = vedata->stl;
EEVEE_TextureList *txl = vedata->txl;
EEVEE_EffectsInfo *effects = stl->effects;
DefaultTextureList *dtxl = DRW_viewport_texture_list_get();
struct GPUBatch *quad = DRW_cache_fullscreen_quad_get();
if ((effects->enabled_effects & EFFECT_GTAO) != 0) {
/** Occlusion algorithm overview
*
* We separate the computation into 2 steps.
*
* - First we scan the neighborhood pixels to find the maximum horizon angle.
* We save this angle in a RG8 array texture.
*
* - Then we use this angle to compute occlusion with the shading normal at
* the shading stage. This let us do correct shadowing for each diffuse / specular
* lobe present in the shader using the correct normal.
*/
psl->ao_horizon_search = DRW_pass_create("GTAO Horizon Search", DRW_STATE_WRITE_COLOR);
DRWShadingGroup *grp = DRW_shgroup_create(e_data.gtao_sh, psl->ao_horizon_search);
DRW_shgroup_uniform_texture(grp, "utilTex", EEVEE_materials_get_util_tex());
DRW_shgroup_uniform_texture_ref(grp, "maxzBuffer", &txl->maxzbuffer);
DRW_shgroup_uniform_texture_ref(grp, "depthBuffer", &effects->ao_src_depth);
DRW_shgroup_uniform_block(grp, "common_block", sldata->common_ubo);
DRW_shgroup_call(grp, quad, NULL);
psl->ao_horizon_search_layer = DRW_pass_create("GTAO Horizon Search Layer",
DRW_STATE_WRITE_COLOR);
grp = DRW_shgroup_create(e_data.gtao_layer_sh, psl->ao_horizon_search_layer);
DRW_shgroup_uniform_texture(grp, "utilTex", EEVEE_materials_get_util_tex());
DRW_shgroup_uniform_texture_ref(grp, "maxzBuffer", &txl->maxzbuffer);
DRW_shgroup_uniform_texture_ref(grp, "depthBufferLayered", &effects->ao_src_depth);
DRW_shgroup_uniform_block(grp, "common_block", sldata->common_ubo);
DRW_shgroup_uniform_int(grp, "layer", &stl->effects->ao_depth_layer, 1);
DRW_shgroup_call(grp, quad, NULL);
if (G.debug_value == 6) {
psl->ao_horizon_debug = DRW_pass_create("GTAO Horizon Debug", DRW_STATE_WRITE_COLOR);
grp = DRW_shgroup_create(e_data.gtao_debug_sh, psl->ao_horizon_debug);
DRW_shgroup_uniform_texture(grp, "utilTex", EEVEE_materials_get_util_tex());
DRW_shgroup_uniform_texture_ref(grp, "maxzBuffer", &txl->maxzbuffer);
DRW_shgroup_uniform_texture_ref(grp, "depthBuffer", &dtxl->depth);
DRW_shgroup_uniform_texture_ref(grp, "normalBuffer", &effects->ssr_normal_input);
DRW_shgroup_uniform_texture_ref(grp, "horizonBuffer", &effects->gtao_horizons);
DRW_shgroup_uniform_block(grp, "common_block", sldata->common_ubo);
DRW_shgroup_call(grp, quad, NULL);
}
}
}
void EEVEE_screen_raytrace_cache_init(EEVEE_ViewLayerData *sldata, EEVEE_Data *vedata)
{
EEVEE_PassList *psl = vedata->psl;
EEVEE_StorageList *stl = vedata->stl;
EEVEE_TextureList *txl = vedata->txl;
EEVEE_EffectsInfo *effects = stl->effects;
LightCache *lcache = stl->g_data->light_cache;
struct GPUBatch *quad = DRW_cache_fullscreen_quad_get();
if ((effects->enabled_effects & EFFECT_SSR) != 0) {
int options = (effects->reflection_trace_full) ? SSR_FULL_TRACE : 0;
options |= ((effects->enabled_effects & EFFECT_GTAO) != 0) ? SSR_AO : 0;
struct GPUShader *trace_shader = eevee_effects_screen_raytrace_shader_get(options);
struct GPUShader *resolve_shader = eevee_effects_screen_raytrace_shader_get(SSR_RESOLVE |
options);
/** Screen space raytracing overview
*
* Following Frostbite stochastic SSR.
*
* - First pass Trace rays across the depth buffer. The hit position and pdf are
* recorded in a RGBA16F render target for each ray (sample).
*
* - We downsample the previous frame color buffer.
*
* - For each final pixel, we gather neighbors rays and choose a color buffer
* mipmap for each ray using its pdf. (filtered importance sampling)
* We then evaluate the lighting from the probes and mix the results together.
*/
DRW_PASS_CREATE(psl->ssr_raytrace, DRW_STATE_WRITE_COLOR);
DRWShadingGroup *grp = DRW_shgroup_create(trace_shader, psl->ssr_raytrace);
DRW_shgroup_uniform_texture_ref(grp, "depthBuffer", &e_data.depth_src);
DRW_shgroup_uniform_texture_ref(grp, "normalBuffer", &effects->ssr_normal_input);
DRW_shgroup_uniform_texture_ref(grp, "specroughBuffer", &effects->ssr_specrough_input);
DRW_shgroup_uniform_texture_ref(grp, "maxzBuffer", &txl->maxzbuffer);
DRW_shgroup_uniform_texture_ref(grp, "planarDepth", &vedata->txl->planar_depth);
DRW_shgroup_uniform_texture(grp, "utilTex", EEVEE_materials_get_util_tex());
DRW_shgroup_uniform_block(grp, "grid_block", sldata->grid_ubo);
DRW_shgroup_uniform_block(grp, "probe_block", sldata->probe_ubo);
DRW_shgroup_uniform_block(grp, "planar_block", sldata->planar_ubo);
DRW_shgroup_uniform_block(grp, "common_block", sldata->common_ubo);
if (!effects->reflection_trace_full) {
DRW_shgroup_uniform_ivec2(grp, "halfresOffset", effects->ssr_halfres_ofs, 1);
}
DRW_shgroup_call(grp, quad, NULL);
DRW_PASS_CREATE(psl->ssr_resolve, DRW_STATE_WRITE_COLOR | DRW_STATE_BLEND_ADD);
grp = DRW_shgroup_create(resolve_shader, psl->ssr_resolve);
DRW_shgroup_uniform_texture_ref(grp, "depthBuffer", &e_data.depth_src);
DRW_shgroup_uniform_texture_ref(grp, "normalBuffer", &effects->ssr_normal_input);
DRW_shgroup_uniform_texture_ref(grp, "specroughBuffer", &effects->ssr_specrough_input);
DRW_shgroup_uniform_texture_ref(grp, "probeCubes", &lcache->cube_tx.tex);
DRW_shgroup_uniform_texture_ref(grp, "probePlanars", &vedata->txl->planar_pool);
DRW_shgroup_uniform_texture_ref(grp, "planarDepth", &vedata->txl->planar_depth);
DRW_shgroup_uniform_texture_ref(grp, "hitBuffer", &effects->ssr_hit_output);
DRW_shgroup_uniform_texture_ref(grp, "pdfBuffer", &effects->ssr_pdf_output);
DRW_shgroup_uniform_texture_ref(grp, "prevColorBuffer", &txl->color_double_buffer);
DRW_shgroup_uniform_block(grp, "grid_block", sldata->grid_ubo);
DRW_shgroup_uniform_block(grp, "probe_block", sldata->probe_ubo);
DRW_shgroup_uniform_block(grp, "planar_block", sldata->planar_ubo);
DRW_shgroup_uniform_block(grp, "common_block", sldata->common_ubo);
DRW_shgroup_uniform_int(grp, "neighborOffset", &effects->ssr_neighbor_ofs, 1);
if ((effects->enabled_effects & EFFECT_GTAO) != 0) {
DRW_shgroup_uniform_texture(grp, "utilTex", EEVEE_materials_get_util_tex());
DRW_shgroup_uniform_texture_ref(grp, "horizonBuffer", &effects->gtao_horizons);
}
DRW_shgroup_call(grp, quad, NULL);
}
}