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9d7f65630b206385c03d997aa308dbe36c60298f
blender/source/blender/draw/engines/eevee/eevee_render.c
Jeroen Bakker 9d7f65630b EEVEE: GLSL Renderpasses 
Most of the renderpasses in EEVEE used post-processing on the CPU. For
final image rendering this is sufficient, but when we want to display
the data to the user we don't want to transfer to the CPU to do post
processing to then upload it back to the GPU to display the result.

This patch moves the renderpass postprocessing to a GLSL shader.

This is the first step to do, before we will enable the renderpasses in the viewport.

Reviewed By: fclem

Differential Revision: https://developer.blender.org/D6206
2019-11-27 15:50:54 +01:00

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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.
*
* Copyright 2016, Blender Foundation.
*/
/** \file
* \ingroup draw_engine
*/
/**
* Render functions for final render outputs.
*/
#include "DRW_engine.h"
#include "DRW_render.h"
#include "DNA_node_types.h"
#include "DNA_object_types.h"
#include "BKE_object.h"
#include "BLI_rand.h"
#include "BLI_rect.h"
#include "DEG_depsgraph_query.h"
#include "GPU_framebuffer.h"
#include "GPU_state.h"
#include "RE_pipeline.h"
#include "eevee_private.h"
void EEVEE_render_init(EEVEE_Data *ved, RenderEngine *engine, struct Depsgraph *depsgraph)
{
EEVEE_Data *vedata = (EEVEE_Data *)ved;
EEVEE_StorageList *stl = vedata->stl;
EEVEE_TextureList *txl = vedata->txl;
EEVEE_FramebufferList *fbl = vedata->fbl;
EEVEE_ViewLayerData *sldata = EEVEE_view_layer_data_ensure();
Scene *scene = DEG_get_evaluated_scene(depsgraph);
const float *size_orig = DRW_viewport_size_get();
float size_final[2];
float camtexcofac[4];
/* Init default FB and render targets:
* In render mode the default framebuffer is not generated
* because there is no viewport. So we need to manually create it or
* not use it. For code clarity we just allocate it make use of it. */
DefaultFramebufferList *dfbl = DRW_viewport_framebuffer_list_get();
DefaultTextureList *dtxl = DRW_viewport_texture_list_get();
/* Alloc transient data. */
if (!stl->g_data) {
stl->g_data = MEM_callocN(sizeof(*stl->g_data), __func__);
}
EEVEE_PrivateData *g_data = stl->g_data;
g_data->background_alpha = DRW_state_draw_background() ? 1.0f : 0.0f;
g_data->valid_double_buffer = 0;
copy_v2_v2(g_data->size_orig, size_orig);
if (scene->eevee.flag & SCE_EEVEE_OVERSCAN) {
g_data->overscan = scene->eevee.overscan / 100.0f;
g_data->overscan_pixels = roundf(max_ff(size_orig[0], size_orig[1]) * g_data->overscan);
madd_v2_v2v2fl(size_final, size_orig, (float[2]){2.0f, 2.0f}, g_data->overscan_pixels);
camtexcofac[0] = size_final[0] / size_orig[0];
camtexcofac[1] = size_final[1] / size_orig[1];
camtexcofac[2] = -camtexcofac[0] * g_data->overscan_pixels / size_final[0];
camtexcofac[3] = -camtexcofac[1] * g_data->overscan_pixels / size_final[1];
}
else {
copy_v2_v2(size_final, size_orig);
g_data->overscan = 0.0f;
g_data->overscan_pixels = 0.0f;
copy_v4_fl4(camtexcofac, 1.0f, 1.0f, 0.0f, 0.0f);
}
/* XXX overriding viewport size. Simplify things but is not really 100% safe. */
DRW_render_viewport_size_set((int[2]){size_orig[0] + g_data->overscan_pixels * 2.0f,
size_orig[1] + g_data->overscan_pixels * 2.0f});
/* TODO 32 bit depth */
DRW_texture_ensure_fullscreen_2d(&dtxl->depth, GPU_DEPTH24_STENCIL8, 0);
DRW_texture_ensure_fullscreen_2d(&txl->color, GPU_RGBA32F, DRW_TEX_FILTER | DRW_TEX_MIPMAP);
GPU_framebuffer_ensure_config(
&dfbl->default_fb,
{GPU_ATTACHMENT_TEXTURE(dtxl->depth), GPU_ATTACHMENT_TEXTURE(txl->color)});
GPU_framebuffer_ensure_config(
&fbl->main_fb, {GPU_ATTACHMENT_TEXTURE(dtxl->depth), GPU_ATTACHMENT_TEXTURE(txl->color)});
GPU_framebuffer_ensure_config(&fbl->main_color_fb,
{GPU_ATTACHMENT_NONE, GPU_ATTACHMENT_TEXTURE(txl->color)});
/* Alloc common ubo data. */
if (sldata->common_ubo == NULL) {
sldata->common_ubo = DRW_uniformbuffer_create(sizeof(sldata->common_data),
&sldata->common_data);
}
/* Set the pers & view matrix. */
float winmat[4][4], viewmat[4][4], viewinv[4][4];
/* TODO(sergey): Shall render hold pointer to an evaluated camera instead? */
struct Object *ob_camera_eval = DEG_get_evaluated_object(depsgraph, RE_GetCamera(engine->re));
float frame = BKE_scene_frame_get(scene);
RE_GetCameraWindow(engine->re, ob_camera_eval, frame, winmat);
RE_GetCameraWindowWithOverscan(engine->re, winmat, g_data->overscan);
RE_GetCameraModelMatrix(engine->re, ob_camera_eval, viewinv);
invert_m4_m4(viewmat, viewinv);
DRWView *view = DRW_view_create(viewmat, winmat, NULL, NULL, NULL);
DRW_view_camtexco_set(view, camtexcofac);
DRW_view_default_set(view);
DRW_view_set_active(view);
/* `EEVEE_renderpasses_init` will set the active render passes used by `EEVEE_effects_init`.
* `EEVEE_effects_init` needs to go second for TAA. */
EEVEE_renderpasses_init(vedata);
EEVEE_effects_init(sldata, vedata, ob_camera_eval, false);
EEVEE_materials_init(sldata, stl, fbl);
EEVEE_shadows_init(sldata);
EEVEE_lightprobes_init(sldata, vedata);
/* INIT CACHE */
EEVEE_bloom_cache_init(sldata, vedata);
EEVEE_depth_of_field_cache_init(sldata, vedata);
EEVEE_effects_cache_init(sldata, vedata);
EEVEE_lightprobes_cache_init(sldata, vedata);
EEVEE_lights_cache_init(sldata, vedata);
EEVEE_materials_cache_init(sldata, vedata);
EEVEE_motion_blur_cache_init(sldata, vedata);
EEVEE_occlusion_cache_init(sldata, vedata);
EEVEE_screen_raytrace_cache_init(sldata, vedata);
EEVEE_subsurface_cache_init(sldata, vedata);
EEVEE_temporal_sampling_cache_init(sldata, vedata);
EEVEE_volumes_cache_init(sldata, vedata);
}
/* Used by light cache. in this case engine is NULL. */
void EEVEE_render_cache(void *vedata,
struct Object *ob,
struct RenderEngine *engine,
struct Depsgraph *UNUSED(depsgraph))
{
EEVEE_ViewLayerData *sldata = EEVEE_view_layer_data_ensure();
EEVEE_LightProbesInfo *pinfo = sldata->probes;
bool cast_shadow = false;
if (pinfo->vis_data.collection) {
/* Used for rendering probe with visibility groups. */
bool ob_vis = BKE_collection_has_object_recursive(pinfo->vis_data.collection, ob);
ob_vis = (pinfo->vis_data.invert) ? !ob_vis : ob_vis;
if (!ob_vis) {
return;
}
}
/* Don't print dupli objects as this can be very verbose and
* increase the render time on Windows because of slow windows term.
* (see T59649) */
if (engine && (ob->base_flag & BASE_FROM_DUPLI) == 0) {
char info[42];
BLI_snprintf(info, sizeof(info), "Syncing %s", ob->id.name + 2);
RE_engine_update_stats(engine, NULL, info);
}
const int ob_visibility = DRW_object_visibility_in_active_context(ob);
if (ob_visibility & OB_VISIBLE_PARTICLES) {
EEVEE_hair_cache_populate(vedata, sldata, ob, &cast_shadow);
}
if (ob_visibility & OB_VISIBLE_SELF) {
if (ELEM(ob->type, OB_MESH, OB_CURVE, OB_SURF, OB_FONT, OB_MBALL)) {
EEVEE_materials_cache_populate(vedata, sldata, ob, &cast_shadow);
}
else if (ob->type == OB_LIGHTPROBE) {
EEVEE_lightprobes_cache_add(sldata, vedata, ob);
}
else if (ob->type == OB_LAMP) {
EEVEE_lights_cache_add(sldata, ob);
}
}
if (cast_shadow) {
EEVEE_shadows_caster_register(sldata, ob);
}
}
static void eevee_render_color_result(RenderLayer *rl,
const char *viewname,
const rcti *rect,
const char *render_pass_name,
int num_channels,
GPUFrameBuffer *framebuffer,
EEVEE_Data *vedata)
{
RenderPass *rp = RE_pass_find_by_name(rl, render_pass_name, viewname);
GPU_framebuffer_bind(framebuffer);
GPU_framebuffer_read_color(framebuffer,
vedata->stl->g_data->overscan_pixels + rect->xmin,
vedata->stl->g_data->overscan_pixels + rect->ymin,
BLI_rcti_size_x(rect),
BLI_rcti_size_y(rect),
num_channels,
0,
rp->rect);
}
static void eevee_render_result_combined(RenderLayer *rl,
const char *viewname,
const rcti *rect,
EEVEE_Data *vedata,
EEVEE_ViewLayerData *UNUSED(sldata))
{
eevee_render_color_result(
rl, viewname, rect, RE_PASSNAME_COMBINED, 4, vedata->stl->effects->final_fb, vedata);
}
static void eevee_render_result_subsurface(RenderLayer *rl,
const char *viewname,
const rcti *rect,
EEVEE_Data *vedata,
EEVEE_ViewLayerData *sldata)
{
if (vedata->fbl->sss_accum_fb == NULL) {
/* SSS is not enabled. */
return;
}
if ((vedata->stl->g_data->render_passes & SCE_PASS_SUBSURFACE_COLOR) != 0) {
EEVEE_renderpasses_postprocess(sldata, vedata, SCE_PASS_SUBSURFACE_COLOR);
eevee_render_color_result(
rl, viewname, rect, RE_PASSNAME_SUBSURFACE_COLOR, 3, vedata->fbl->renderpass_fb, vedata);
}
if ((vedata->stl->g_data->render_passes & SCE_PASS_SUBSURFACE_DIRECT) != 0) {
EEVEE_renderpasses_postprocess(sldata, vedata, SCE_PASS_SUBSURFACE_DIRECT);
eevee_render_color_result(
rl, viewname, rect, RE_PASSNAME_SUBSURFACE_DIRECT, 3, vedata->fbl->renderpass_fb, vedata);
}
if ((vedata->stl->g_data->render_passes & SCE_PASS_SUBSURFACE_INDIRECT) != 0) {
/* Do nothing as all the lighting is in the direct pass.
* TODO : Separate Direct from indirect lighting. */
}
}
static void eevee_render_result_normal(RenderLayer *rl,
const char *viewname,
const rcti *rect,
EEVEE_Data *vedata,
EEVEE_ViewLayerData *sldata)
{
const int current_sample = vedata->stl->effects->taa_current_sample;
/* Only read the center texel. */
if (current_sample > 1) {
return;
}
if ((vedata->stl->g_data->render_passes & SCE_PASS_NORMAL) != 0) {
EEVEE_renderpasses_postprocess(sldata, vedata, SCE_PASS_NORMAL);
eevee_render_color_result(
rl, viewname, rect, RE_PASSNAME_NORMAL, 3, vedata->fbl->renderpass_fb, vedata);
}
}
static void eevee_render_result_z(RenderLayer *rl,
const char *viewname,
const rcti *rect,
EEVEE_Data *vedata,
EEVEE_ViewLayerData *sldata)
{
const int current_sample = vedata->stl->effects->taa_current_sample;
/* Only read the center texel. */
if (current_sample > 1) {
return;
}
if ((vedata->stl->g_data->render_passes & SCE_PASS_Z) != 0) {
EEVEE_renderpasses_postprocess(sldata, vedata, SCE_PASS_Z);
eevee_render_color_result(
rl, viewname, rect, RE_PASSNAME_Z, 1, vedata->fbl->renderpass_fb, vedata);
}
}
static void eevee_render_result_mist(RenderLayer *rl,
const char *viewname,
const rcti *rect,
EEVEE_Data *vedata,
EEVEE_ViewLayerData *sldata)
{
if ((vedata->stl->g_data->render_passes & SCE_PASS_MIST) != 0) {
EEVEE_renderpasses_postprocess(sldata, vedata, SCE_PASS_MIST);
eevee_render_color_result(
rl, viewname, rect, RE_PASSNAME_MIST, 1, vedata->fbl->renderpass_fb, vedata);
}
}
static void eevee_render_result_occlusion(RenderLayer *rl,
const char *viewname,
const rcti *rect,
EEVEE_Data *vedata,
EEVEE_ViewLayerData *sldata)
{
if (vedata->fbl->ao_accum_fb == NULL) {
/* AO is not enabled. */
return;
}
if ((vedata->stl->g_data->render_passes & SCE_PASS_AO) != 0) {
EEVEE_renderpasses_postprocess(sldata, vedata, SCE_PASS_AO);
eevee_render_color_result(
rl, viewname, rect, RE_PASSNAME_AO, 3, vedata->fbl->renderpass_fb, vedata);
}
}
static void eevee_render_draw_background(EEVEE_Data *vedata)
{
EEVEE_FramebufferList *fbl = vedata->fbl;
EEVEE_StorageList *stl = vedata->stl;
EEVEE_PassList *psl = vedata->psl;
/* Prevent background to write to data buffers.
* NOTE : This also make sure the textures are bound
* to the right double buffer. */
GPU_framebuffer_ensure_config(&fbl->main_fb,
{GPU_ATTACHMENT_LEAVE,
GPU_ATTACHMENT_LEAVE,
GPU_ATTACHMENT_NONE,
GPU_ATTACHMENT_NONE,
GPU_ATTACHMENT_NONE,
GPU_ATTACHMENT_NONE});
GPU_framebuffer_bind(fbl->main_fb);
DRW_draw_pass(psl->background_pass);
GPU_framebuffer_ensure_config(&fbl->main_fb,
{GPU_ATTACHMENT_LEAVE,
GPU_ATTACHMENT_LEAVE,
GPU_ATTACHMENT_TEXTURE(stl->effects->ssr_normal_input),
GPU_ATTACHMENT_TEXTURE(stl->effects->ssr_specrough_input),
GPU_ATTACHMENT_TEXTURE(stl->effects->sss_irradiance),
GPU_ATTACHMENT_TEXTURE(stl->effects->sss_radius),
GPU_ATTACHMENT_TEXTURE(stl->effects->sss_albedo)});
GPU_framebuffer_bind(fbl->main_fb);
}
void EEVEE_render_draw(EEVEE_Data *vedata, RenderEngine *engine, RenderLayer *rl, const rcti *rect)
{
const DRWContextState *draw_ctx = DRW_context_state_get();
const Scene *scene_eval = DEG_get_evaluated_scene(draw_ctx->depsgraph);
const char *viewname = RE_GetActiveRenderView(engine->re);
EEVEE_PassList *psl = vedata->psl;
EEVEE_StorageList *stl = vedata->stl;
EEVEE_FramebufferList *fbl = vedata->fbl;
DefaultTextureList *dtxl = DRW_viewport_texture_list_get();
EEVEE_ViewLayerData *sldata = EEVEE_view_layer_data_ensure();
EEVEE_PrivateData *g_data = stl->g_data;
/* FINISH CACHE */
EEVEE_volumes_cache_finish(sldata, vedata);
EEVEE_materials_cache_finish(sldata, vedata);
EEVEE_lights_cache_finish(sldata, vedata);
EEVEE_lightprobes_cache_finish(sldata, vedata);
EEVEE_effects_draw_init(sldata, vedata);
EEVEE_volumes_draw_init(sldata, vedata);
/* Sort transparents before the loop. */
DRW_pass_sort_shgroup_z(psl->transparent_pass);
/* Push instances attributes to the GPU. */
DRW_render_instance_buffer_finish();
/* Need to be called after DRW_render_instance_buffer_finish() */
/* Also we weed to have a correct fbo bound for DRW_hair_update */
GPU_framebuffer_bind(fbl->main_fb);
DRW_hair_update();
uint tot_sample = scene_eval->eevee.taa_render_samples;
uint render_samples = 0;
/* SSR needs one iteration to start properly. */
if (stl->effects->enabled_effects & EFFECT_SSR) {
tot_sample += 1;
}
EEVEE_renderpasses_output_init(sldata, vedata, tot_sample);
if (RE_engine_test_break(engine)) {
return;
}
while (render_samples < tot_sample && !RE_engine_test_break(engine)) {
float clear_col[4] = {0.0f, 0.0f, 0.0f, 0.0f};
float clear_depth = 1.0f;
uint clear_stencil = 0x00;
uint primes[3] = {2, 3, 7};
double offset[3] = {0.0, 0.0, 0.0};
double r[3];
if ((stl->effects->enabled_effects & EFFECT_SSR) && (render_samples == 1) &&
!stl->effects->ssr_was_valid_double_buffer) {
/* SSR needs one iteration to start properly.
* This iteration was done, reset to the original target sample count. */
render_samples--;
tot_sample--;
/* Reset sampling (and accumulation) after the first sample to avoid
* washed out first bounce for SSR. */
EEVEE_temporal_sampling_reset(vedata);
stl->effects->ssr_was_valid_double_buffer = stl->g_data->valid_double_buffer;
}
/* Don't print every samples as it can lead to bad performance. (see T59649) */
else if ((render_samples % 25) == 0 || (render_samples + 1) == tot_sample) {
char info[42];
BLI_snprintf(
info, sizeof(info), "Rendering %u / %u samples", render_samples + 1, tot_sample);
RE_engine_update_stats(engine, NULL, info);
}
/* Copy previous persmat to UBO data */
copy_m4_m4(sldata->common_data.prev_persmat, stl->effects->prev_persmat);
BLI_halton_3d(primes, offset, stl->effects->taa_current_sample, r);
EEVEE_update_noise(psl, fbl, r);
EEVEE_temporal_sampling_matrices_calc(stl->effects, r);
EEVEE_volumes_set_jitter(sldata, stl->effects->taa_current_sample - 1);
EEVEE_materials_init(sldata, stl, fbl);
/* Refresh Probes */
EEVEE_lightprobes_refresh(sldata, vedata);
EEVEE_lightprobes_refresh_planar(sldata, vedata);
/* Refresh Shadows */
EEVEE_shadows_update(sldata, vedata);
EEVEE_shadows_draw(sldata, vedata, stl->effects->taa_view);
/* Set matrices. */
DRW_view_set_active(stl->effects->taa_view);
/* Set ray type. */
sldata->common_data.ray_type = EEVEE_RAY_CAMERA;
sldata->common_data.ray_depth = 0.0f;
DRW_uniformbuffer_update(sldata->common_ubo, &sldata->common_data);
GPU_framebuffer_bind(fbl->main_fb);
GPU_framebuffer_clear_color_depth_stencil(fbl->main_fb, clear_col, clear_depth, clear_stencil);
/* Depth prepass */
DRW_draw_pass(psl->depth_pass);
DRW_draw_pass(psl->depth_pass_cull);
/* Create minmax texture */
EEVEE_create_minmax_buffer(vedata, dtxl->depth, -1);
EEVEE_occlusion_compute(sldata, vedata, dtxl->depth, -1);
EEVEE_volumes_compute(sldata, vedata);
/* Shading pass */
eevee_render_draw_background(vedata);
GPU_framebuffer_bind(fbl->main_fb);
EEVEE_materials_draw_opaque(sldata, psl);
EEVEE_subsurface_data_render(sldata, vedata);
/* Effects pre-transparency */
EEVEE_subsurface_compute(sldata, vedata);
EEVEE_reflection_compute(sldata, vedata);
EEVEE_refraction_compute(sldata, vedata);
/* Opaque refraction */
DRW_draw_pass(psl->refract_depth_pass);
DRW_draw_pass(psl->refract_depth_pass_cull);
DRW_draw_pass(psl->refract_pass);
/* Subsurface output */
EEVEE_subsurface_output_accumulate(sldata, vedata);
/* Occlusion output */
EEVEE_occlusion_output_accumulate(sldata, vedata);
/* Result NORMAL */
eevee_render_result_normal(rl, viewname, rect, vedata, sldata);
/* Volumetrics Resolve Opaque */
EEVEE_volumes_resolve(sldata, vedata);
/* Mist output */
EEVEE_mist_output_accumulate(sldata, vedata);
/* Transparent */
GPU_framebuffer_texture_attach(fbl->main_color_fb, dtxl->depth, 0, 0);
GPU_framebuffer_bind(fbl->main_color_fb);
DRW_draw_pass(psl->transparent_pass);
GPU_framebuffer_bind(fbl->main_fb);
GPU_framebuffer_texture_detach(fbl->main_color_fb, dtxl->depth);
/* Result Z */
eevee_render_result_z(rl, viewname, rect, vedata, sldata);
/* Post Process */
EEVEE_draw_effects(sldata, vedata);
/* XXX Seems to fix TDR issue with NVidia drivers on linux. */
GPU_finish();
RE_engine_update_progress(engine, (float)(render_samples++) / (float)tot_sample);
}
eevee_render_result_combined(rl, viewname, rect, vedata, sldata);
eevee_render_result_subsurface(rl, viewname, rect, vedata, sldata);
eevee_render_result_mist(rl, viewname, rect, vedata, sldata);
eevee_render_result_occlusion(rl, viewname, rect, vedata, sldata);
/* Restore original viewport size. */
DRW_render_viewport_size_set((int[2]){g_data->size_orig[0], g_data->size_orig[1]});
}
void EEVEE_render_update_passes(RenderEngine *engine, Scene *scene, ViewLayer *view_layer)
{
int type;
RE_engine_register_pass(engine, scene, view_layer, RE_PASSNAME_COMBINED, 4, "RGBA", SOCK_RGBA);
#define CHECK_PASS(name, channels, chanid) \
if (view_layer->passflag & (SCE_PASS_##name)) { \
if (channels == 4) \
type = SOCK_RGBA; \
else if (channels == 3) \
type = SOCK_VECTOR; \
else \
type = SOCK_FLOAT; \
RE_engine_register_pass( \
engine, scene, view_layer, RE_PASSNAME_##name, channels, chanid, type); \
} \
((void)0)
CHECK_PASS(Z, 1, "Z");
CHECK_PASS(MIST, 1, "Z");
CHECK_PASS(NORMAL, 3, "XYZ");
CHECK_PASS(AO, 3, "RGB");
CHECK_PASS(SUBSURFACE_COLOR, 3, "RGB");
CHECK_PASS(SUBSURFACE_DIRECT, 3, "RGB");
#undef CHECK_PASS
}
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