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Distribute shadow map update over multiple frames to reduce stutter (#11422)
Reduces stutter and freezes when playing. * Maintains double SM and SM Color textures * Light frustum update triggers incremental generation of shadow map into secondary 'future' textures. * Every incremental update renders a portion of the shadow draw list (split equally). * After defined number of frames (currently, 4), 'future' and 'current' textures are swapped, and DirectionalLight 'commits' the new frustum to use when rendering shadows on screen. Co-authored-by: sfan5 <sfan5@live.de>
This commit is contained in:
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GitHub
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ff2d2a6e93
commit
bf3acbf388
10 changed files with 224 additions and 72 deletions
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@ -27,10 +27,11 @@ with this program; if not, write to the Free Software Foundation, Inc.,
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#include "client/shader.h"
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#include "client/client.h"
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#include "client/clientmap.h"
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#include "profiler.h"
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ShadowRenderer::ShadowRenderer(IrrlichtDevice *device, Client *client) :
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m_device(device), m_smgr(device->getSceneManager()),
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m_driver(device->getVideoDriver()), m_client(client)
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m_driver(device->getVideoDriver()), m_client(client), m_current_frame(0)
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{
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m_shadows_enabled = true;
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@ -43,7 +44,7 @@ ShadowRenderer::ShadowRenderer(IrrlichtDevice *device, Client *client) :
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m_shadow_map_texture_32bit = g_settings->getBool("shadow_map_texture_32bit");
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m_shadow_map_colored = g_settings->getBool("shadow_map_color");
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m_shadow_samples = g_settings->getS32("shadow_filters");
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m_update_delta = g_settings->getFloat("shadow_update_time");
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m_map_shadow_update_frames = g_settings->getS16("shadow_update_frames");
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}
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ShadowRenderer::~ShadowRenderer()
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@ -66,6 +67,9 @@ ShadowRenderer::~ShadowRenderer()
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if (shadowMapClientMap)
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m_driver->removeTexture(shadowMapClientMap);
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if (shadowMapClientMapFuture)
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m_driver->removeTexture(shadowMapClientMapFuture);
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}
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void ShadowRenderer::initialize()
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@ -93,11 +97,6 @@ void ShadowRenderer::initialize()
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}
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float ShadowRenderer::getUpdateDelta() const
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{
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return m_update_delta;
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}
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size_t ShadowRenderer::addDirectionalLight()
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{
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m_light_list.emplace_back(m_shadow_map_texture_size,
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@ -152,10 +151,9 @@ void ShadowRenderer::setClearColor(video::SColor ClearColor)
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m_clear_color = ClearColor;
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}
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void ShadowRenderer::update(video::ITexture *outputTarget)
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void ShadowRenderer::updateSMTextures()
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{
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if (!m_shadows_enabled || m_smgr->getActiveCamera() == nullptr) {
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m_smgr->drawAll();
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return;
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}
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@ -174,6 +172,13 @@ void ShadowRenderer::update(video::ITexture *outputTarget)
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true);
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}
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if (!shadowMapClientMapFuture && m_map_shadow_update_frames > 1) {
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shadowMapClientMapFuture = getSMTexture(
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std::string("shadow_clientmap_bb_") + itos(m_shadow_map_texture_size),
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m_shadow_map_colored ? m_texture_format_color : m_texture_format,
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true);
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}
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if (m_shadow_map_colored && !shadowMapTextureColors) {
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shadowMapTextureColors = getSMTexture(
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std::string("shadow_colored_") + itos(m_shadow_map_texture_size),
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@ -201,7 +206,22 @@ void ShadowRenderer::update(video::ITexture *outputTarget)
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}
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if (!m_shadow_node_array.empty() && !m_light_list.empty()) {
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// for every directional light:
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bool reset_sm_texture = false;
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// detect if SM should be regenerated
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for (DirectionalLight &light : m_light_list) {
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if (light.should_update_map_shadow) {
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light.should_update_map_shadow = false;
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m_current_frame = 0;
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reset_sm_texture = true;
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}
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}
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video::ITexture* shadowMapTargetTexture = shadowMapClientMapFuture;
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if (shadowMapTargetTexture == nullptr)
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shadowMapTargetTexture = shadowMapClientMap;
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// Update SM incrementally:
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for (DirectionalLight &light : m_light_list) {
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// Static shader values.
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m_shadow_depth_cb->MapRes = (f32)m_shadow_map_texture_size;
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@ -212,22 +232,60 @@ void ShadowRenderer::update(video::ITexture *outputTarget)
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// Depth texture is available in irrlicth maybe we
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// should put some gl* fn here
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if (light.should_update_map_shadow) {
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light.should_update_map_shadow = false;
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m_driver->setRenderTarget(shadowMapClientMap, true, true,
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if (m_current_frame < m_map_shadow_update_frames) {
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m_driver->setRenderTarget(shadowMapTargetTexture, reset_sm_texture, true,
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video::SColor(255, 255, 255, 255));
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renderShadowMap(shadowMapClientMap, light);
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renderShadowMap(shadowMapTargetTexture, light);
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if (m_shadow_map_colored) {
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m_driver->setRenderTarget(shadowMapTextureColors,
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true, false, video::SColor(255, 255, 255, 255));
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// Render transparent part in one pass.
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// This is also handled in ClientMap.
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if (m_current_frame == m_map_shadow_update_frames - 1) {
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if (m_shadow_map_colored) {
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m_driver->setRenderTarget(shadowMapTextureColors,
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true, false, video::SColor(255, 255, 255, 255));
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}
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renderShadowMap(shadowMapTextureColors, light,
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scene::ESNRP_TRANSPARENT);
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}
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renderShadowMap(shadowMapTextureColors, light,
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scene::ESNRP_TRANSPARENT);
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m_driver->setRenderTarget(0, false, false);
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}
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reset_sm_texture = false;
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} // end for lights
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// move to the next section
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if (m_current_frame <= m_map_shadow_update_frames)
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++m_current_frame;
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// pass finished, swap textures and commit light changes
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if (m_current_frame == m_map_shadow_update_frames) {
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if (shadowMapClientMapFuture != nullptr)
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std::swap(shadowMapClientMapFuture, shadowMapClientMap);
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// Let all lights know that maps are updated
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for (DirectionalLight &light : m_light_list)
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light.commitFrustum();
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}
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}
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}
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void ShadowRenderer::update(video::ITexture *outputTarget)
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{
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if (!m_shadows_enabled || m_smgr->getActiveCamera() == nullptr) {
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m_smgr->drawAll();
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return;
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}
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updateSMTextures();
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if (!m_shadow_node_array.empty() && !m_light_list.empty()) {
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for (DirectionalLight &light : m_light_list) {
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// Static shader values.
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m_shadow_depth_cb->MapRes = (f32)m_shadow_map_texture_size;
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m_shadow_depth_cb->MaxFar = (f32)m_shadow_map_max_distance * BS;
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// render shadows for the n0n-map objects.
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m_driver->setRenderTarget(shadowMapTextureDynamicObjects, true,
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true, video::SColor(255, 255, 255, 255));
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@ -299,8 +357,8 @@ video::ITexture *ShadowRenderer::getSMTexture(const std::string &shadow_map_name
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void ShadowRenderer::renderShadowMap(video::ITexture *target,
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DirectionalLight &light, scene::E_SCENE_NODE_RENDER_PASS pass)
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{
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m_driver->setTransform(video::ETS_VIEW, light.getViewMatrix());
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m_driver->setTransform(video::ETS_PROJECTION, light.getProjectionMatrix());
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m_driver->setTransform(video::ETS_VIEW, light.getFutureViewMatrix());
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m_driver->setTransform(video::ETS_PROJECTION, light.getFutureProjectionMatrix());
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// Operate on the client map
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for (const auto &shadow_node : m_shadow_node_array) {
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@ -322,10 +380,13 @@ void ShadowRenderer::renderShadowMap(video::ITexture *target,
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//material.PolygonOffsetDepthBias = 1.0f/4.0f;
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//material.PolygonOffsetSlopeScale = -1.f;
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if (m_shadow_map_colored && pass != scene::ESNRP_SOLID)
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if (m_shadow_map_colored && pass != scene::ESNRP_SOLID) {
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material.MaterialType = (video::E_MATERIAL_TYPE) depth_shader_trans;
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else
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}
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else {
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material.MaterialType = (video::E_MATERIAL_TYPE) depth_shader;
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material.BlendOperation = video::EBO_MIN;
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}
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// FIXME: I don't think this is needed here
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map_node->OnAnimate(m_device->getTimer()->getTime());
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@ -333,7 +394,7 @@ void ShadowRenderer::renderShadowMap(video::ITexture *target,
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m_driver->setTransform(video::ETS_WORLD,
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map_node->getAbsoluteTransformation());
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map_node->renderMapShadows(m_driver, material, pass);
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map_node->renderMapShadows(m_driver, material, pass, m_current_frame, m_map_shadow_update_frames);
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break;
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}
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}
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@ -354,8 +415,10 @@ void ShadowRenderer::renderShadowObjects(
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u32 n_node_materials = shadow_node.node->getMaterialCount();
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std::vector<s32> BufferMaterialList;
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std::vector<std::pair<bool, bool>> BufferMaterialCullingList;
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std::vector<video::E_BLEND_OPERATION> BufferBlendOperationList;
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BufferMaterialList.reserve(n_node_materials);
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BufferMaterialCullingList.reserve(n_node_materials);
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BufferBlendOperationList.reserve(n_node_materials);
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// backup materialtype for each material
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// (aka shader)
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@ -365,12 +428,11 @@ void ShadowRenderer::renderShadowObjects(
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BufferMaterialList.push_back(current_mat.MaterialType);
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current_mat.MaterialType =
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(video::E_MATERIAL_TYPE)depth_shader;
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current_mat.setTexture(3, shadowMapTextureFinal);
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(video::E_MATERIAL_TYPE)depth_shader_entities;
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BufferMaterialCullingList.emplace_back(
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(bool)current_mat.BackfaceCulling, (bool)current_mat.FrontfaceCulling);
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BufferBlendOperationList.push_back(current_mat.BlendOperation);
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current_mat.BackfaceCulling = true;
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current_mat.FrontfaceCulling = false;
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@ -393,6 +455,7 @@ void ShadowRenderer::renderShadowObjects(
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current_mat.BackfaceCulling = BufferMaterialCullingList[m].first;
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current_mat.FrontfaceCulling = BufferMaterialCullingList[m].second;
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current_mat.BlendOperation = BufferBlendOperationList[m];
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}
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} // end for caster shadow nodes
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@ -433,7 +496,7 @@ void ShadowRenderer::createShaders()
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readShaderFile(depth_shader_vs).c_str(), "vertexMain",
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video::EVST_VS_1_1,
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readShaderFile(depth_shader_fs).c_str(), "pixelMain",
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video::EPST_PS_1_2, m_shadow_depth_cb);
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video::EPST_PS_1_2, m_shadow_depth_cb, video::EMT_ONETEXTURE_BLEND);
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if (depth_shader == -1) {
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// upsi, something went wrong loading shader.
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@ -449,6 +512,41 @@ void ShadowRenderer::createShaders()
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m_driver->getMaterialRenderer(depth_shader)->grab();
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}
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// This creates a clone of depth_shader with base material set to EMT_SOLID,
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// because entities won't render shadows with base material EMP_ONETEXTURE_BLEND
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if (depth_shader_entities == -1) {
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std::string depth_shader_vs = getShaderPath("shadow_shaders", "pass1_vertex.glsl");
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if (depth_shader_vs.empty()) {
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m_shadows_enabled = false;
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errorstream << "Error shadow mapping vs shader not found." << std::endl;
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return;
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}
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std::string depth_shader_fs = getShaderPath("shadow_shaders", "pass1_fragment.glsl");
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if (depth_shader_fs.empty()) {
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m_shadows_enabled = false;
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errorstream << "Error shadow mapping fs shader not found." << std::endl;
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return;
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}
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depth_shader_entities = gpu->addHighLevelShaderMaterial(
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readShaderFile(depth_shader_vs).c_str(), "vertexMain",
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video::EVST_VS_1_1,
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readShaderFile(depth_shader_fs).c_str(), "pixelMain",
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video::EPST_PS_1_2, m_shadow_depth_cb);
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if (depth_shader_entities == -1) {
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// upsi, something went wrong loading shader.
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m_shadows_enabled = false;
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errorstream << "Error compiling shadow mapping shader (dynamic)." << std::endl;
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return;
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}
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// HACK, TODO: investigate this better
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// Grab the material renderer once more so minetest doesn't crash
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// on exit
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m_driver->getMaterialRenderer(depth_shader_entities)->grab();
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}
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if (mixcsm_shader == -1) {
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std::string depth_shader_vs = getShaderPath("shadow_shaders", "pass2_vertex.glsl");
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if (depth_shader_vs.empty()) {
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