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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2021 Blender Foundation.
*/
/** \file
* \ingroup eevee
*
* An instance contains all structures needed to do a complete render.
*/
#include <sstream>
#include "BKE_global.h"
#include "BKE_object.h"
#include "BLI_rect.h"
#include "DEG_depsgraph_query.h"
#include "DNA_ID.h"
#include "DNA_lightprobe_types.h"
#include "DNA_modifier_types.h"
#include "RE_pipeline.h"
#include "eevee_instance.hh"
namespace blender::eevee {
/* -------------------------------------------------------------------- */
/** \name Initialization
*
* Initialization functions need to be called once at the start of a frame.
* Active camera, render extent and enabled render passes are immutable until next init.
* This takes care of resizing output buffers and view in case a parameter changed.
* IMPORTANT: xxx.init() functions are NOT meant to acquire and allocate DRW resources.
* Any attempt to do so will likely produce use after free situations.
* \{ */
void Instance::init(const int2 &output_res,
const rcti *output_rect,
RenderEngine *render_,
Depsgraph *depsgraph_,
const LightProbe *light_probe_,
Object *camera_object_,
const RenderLayer *render_layer_,
const DRWView *drw_view_,
const View3D *v3d_,
const RegionView3D *rv3d_)
{
UNUSED_VARS(light_probe_);
render = render_;
depsgraph = depsgraph_;
camera_orig_object = camera_object_;
render_layer = render_layer_;
drw_view = drw_view_;
v3d = v3d_;
rv3d = rv3d_;
if (assign_if_different(debug_mode, (eDebugMode)G.debug_value)) {
sampling.reset();
}
info = "";
update_eval_members();
sampling.init(scene);
camera.init();
film.init(output_res, output_rect);
velocity.init();
depth_of_field.init();
motion_blur.init();
main_view.init();
}
void Instance::set_time(float time)
{
BLI_assert(render);
DRW_render_set_time(render, depsgraph, floorf(time), fractf(time));
update_eval_members();
}
void Instance::update_eval_members()
{
scene = DEG_get_evaluated_scene(depsgraph);
view_layer = DEG_get_evaluated_view_layer(depsgraph);
camera_eval_object = (camera_orig_object) ?
DEG_get_evaluated_object(depsgraph, camera_orig_object) :
nullptr;
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Sync
*
* Sync will gather data from the scene that can change over a time step (i.e: motion steps).
* IMPORTANT: xxx.sync() functions area responsible for creating DRW resources (i.e: DRWView) as
* well as querying temp texture pool. All DRWPasses should be ready by the end end_sync().
* \{ */
void Instance::begin_sync()
{
materials.begin_sync();
velocity.begin_sync(); /* NOTE: Also syncs camera. */
lights.begin_sync();
gpencil_engine_enabled = false;
depth_of_field.sync();
motion_blur.sync();
hiz_buffer.sync();
pipelines.sync();
main_view.sync();
world.sync();
film.sync();
}
void Instance::object_sync(Object *ob)
{
const bool is_renderable_type = ELEM(ob->type, OB_CURVES, OB_GPENCIL, OB_MESH, OB_LAMP);
const int ob_visibility = DRW_object_visibility_in_active_context(ob);
const bool partsys_is_visible = (ob_visibility & OB_VISIBLE_PARTICLES) != 0 &&
(ob->type == OB_MESH);
const bool object_is_visible = DRW_object_is_renderable(ob) &&
(ob_visibility & OB_VISIBLE_SELF) != 0;
if (!is_renderable_type || (!partsys_is_visible && !object_is_visible)) {
return;
}
ObjectHandle &ob_handle = sync.sync_object(ob);
if (partsys_is_visible && ob != DRW_context_state_get()->object_edit) {
LISTBASE_FOREACH (ModifierData *, md, &ob->modifiers) {
if (md->type == eModifierType_ParticleSystem) {
sync.sync_curves(ob, ob_handle, md);
}
}
}
if (object_is_visible) {
switch (ob->type) {
case OB_LAMP:
lights.sync_light(ob, ob_handle);
break;
case OB_MESH:
case OB_CURVES_LEGACY:
case OB_SURF:
case OB_FONT: {
sync.sync_mesh(ob, ob_handle);
break;
}
case OB_VOLUME:
break;
case OB_CURVES:
sync.sync_curves(ob, ob_handle);
break;
case OB_GPENCIL:
sync.sync_gpencil(ob, ob_handle);
break;
default:
break;
}
}
ob_handle.reset_recalc_flag();
}
/* Wrapper to use with DRW_render_object_iter. */
void Instance::object_sync_render(void *instance_,
Object *ob,
RenderEngine *engine,
Depsgraph *depsgraph)
{
UNUSED_VARS(engine, depsgraph);
Instance &inst = *reinterpret_cast<Instance *>(instance_);
inst.object_sync(ob);
}
void Instance::end_sync()
{
velocity.end_sync();
lights.end_sync();
sampling.end_sync();
film.end_sync();
}
void Instance::render_sync()
{
DRW_cache_restart();
begin_sync();
DRW_render_object_iter(this, render, depsgraph, object_sync_render);
end_sync();
DRW_render_instance_buffer_finish();
/* Also we weed to have a correct FBO bound for #DRW_hair_update */
// GPU_framebuffer_bind();
// DRW_hair_update();
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Rendering
* \{ */
/**
* Conceptually renders one sample per pixel.
* Everything based on random sampling should be done here (i.e: DRWViews jitter)
**/
void Instance::render_sample()
{
if (sampling.finished_viewport()) {
film.display();
return;
}
/* Motion blur may need to do re-sync after a certain number of sample. */
if (!is_viewport() && sampling.do_render_sync()) {
render_sync();
}
sampling.step();
main_view.render();
motion_blur.step();
}
void Instance::render_read_result(RenderLayer *render_layer, const char *view_name)
{
eViewLayerEEVEEPassType pass_bits = film.enabled_passes_get();
for (auto i : IndexRange(EEVEE_RENDER_PASS_MAX_BIT)) {
eViewLayerEEVEEPassType pass_type = eViewLayerEEVEEPassType(pass_bits & (1 << i));
if (pass_type == 0) {
continue;
}
const char *pass_name = Film::pass_to_render_pass_name(pass_type);
RenderPass *rp = RE_pass_find_by_name(render_layer, pass_name, view_name);
if (rp) {
float *result = film.read_pass(pass_type);
if (result) {
BLI_mutex_lock(&render->update_render_passes_mutex);
/* WORKAROUND: We use texture read to avoid using a framebuffer to get the render result.
* However, on some implementation, we need a buffer with a few extra bytes for the read to
* happen correctly (see GLTexture::read()). So we need a custom memory allocation. */
/* Avoid memcpy(), replace the pointer directly. */
MEM_SAFE_FREE(rp->rect);
rp->rect = result;
BLI_mutex_unlock(&render->update_render_passes_mutex);
}
}
}
/* The vector pass is initialized to weird values. Set it to neutral value if not rendered. */
if ((pass_bits & EEVEE_RENDER_PASS_VECTOR) == 0) {
const char *vector_pass_name = Film::pass_to_render_pass_name(EEVEE_RENDER_PASS_VECTOR);
RenderPass *vector_rp = RE_pass_find_by_name(render_layer, vector_pass_name, view_name);
if (vector_rp) {
memset(vector_rp->rect, 0, sizeof(float) * 4 * vector_rp->rectx * vector_rp->recty);
}
}
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Interface
* \{ */
void Instance::render_frame(RenderLayer *render_layer, const char *view_name)
{
while (!sampling.finished()) {
this->render_sample();
/* TODO(fclem) print progression. */
#if 0
/* TODO(fclem): Does not currently work. But would be better to just display to 2D view like
* cycles does. */
if (G.background == false && first_read) {
/* Allow to preview the first sample. */
/* TODO(fclem): Might want to not do this during animation render to avoid too much stall. */
this->render_read_result(render_layer, view_name);
first_read = false;
DRW_render_context_disable(render->re);
/* Allow the 2D viewport to grab the ticket mutex to display the render. */
DRW_render_context_enable(render->re);
}
#endif
}
this->render_read_result(render_layer, view_name);
}
void Instance::draw_viewport(DefaultFramebufferList *dfbl)
{
UNUSED_VARS(dfbl);
render_sample();
velocity.step_swap();
/* Do not request redraw during viewport animation to lock the framerate to the animation
* playback rate. This is in order to preserve motion blur aspect and also to avoid TAA reset
* that can show flickering. */
if (!sampling.finished_viewport() && !DRW_state_is_playback()) {
DRW_viewport_request_redraw();
}
if (materials.queued_shaders_count > 0) {
std::stringstream ss;
ss << "Compiling Shaders " << materials.queued_shaders_count;
info = ss.str();
}
}
/** \} */
} // namespace blender::eevee
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