Some work adding shadows in indirect

src/anki/core/Config.cpp

@@ -42,6 +42,7 @@ Config::Config()
 
 	newOption("r.indirect.reflectionResolution", 128);
 	newOption("r.indirect.maxSimultaneousProbeCount", 32);
+	newOption("r.indirect.shadowMapResolution", 64);
 
 	newOption("r.motionBlur.maxSamples", 32);
 

src/anki/renderer/Indirect.cpp

@@ -50,6 +50,7 @@ Error Indirect::initInternal(const ConfigSet& config)
 	ANKI_CHECK(initLightShading(config));
 	ANKI_CHECK(initIrradiance(config));
 	ANKI_CHECK(initIrradianceToRefl(config));
+	ANKI_CHECK(initShadowMapping(config));
 
 	// Load split sum integration LUT
 	ANKI_CHECK(getResourceManager().loadResource("engine_data/SplitSumIntegration.ankitex", m_integrationLut));
@@ -101,7 +102,7 @@ Error Indirect::initGBuffer(const ConfigSet& config)
 
 		m_gbuffer.m_fbDescr.m_depthStencilAttachment.m_aspect = DepthStencilAspectBit::DEPTH;
 		m_gbuffer.m_fbDescr.m_depthStencilAttachment.m_loadOperation = AttachmentLoadOperation::CLEAR;
-		m_gbuffer.m_fbDescr.m_depthStencilAttachment.m_clearValue.m_depthStencil.m_depth = 1.0;
+		m_gbuffer.m_fbDescr.m_depthStencilAttachment.m_clearValue.m_depthStencil.m_depth = 1.0f;
 
 		m_gbuffer.m_fbDescr.bake();
 	}
@@ -186,6 +187,26 @@ Error Indirect::initIrradianceToRefl(const ConfigSet& cfg)
 	return Error::NONE;
 }
 
+Error Indirect::initShadowMapping(const ConfigSet& cfg)
+{
+	const U resolution = cfg.getNumber("r.indirect.shadowMapResolution");
+	ANKI_ASSERT(resolution > 8);
+
+	// RT descr
+	m_shadowMapping.m_rtDescr =
+		m_r->create2DRenderTargetDescription(resolution, resolution, Format::D16_UNORM, "GI SM");
+	m_shadowMapping.m_rtDescr.bake();
+
+	// FB descr
+	m_shadowMapping.m_fbDescr.m_colorAttachmentCount = 0;
+	m_shadowMapping.m_fbDescr.m_depthStencilAttachment.m_aspect = DepthStencilAspectBit::DEPTH;
+	m_shadowMapping.m_fbDescr.m_depthStencilAttachment.m_clearValue.m_depthStencil.m_depth = 1.0f;
+	m_shadowMapping.m_fbDescr.m_depthStencilAttachment.m_loadOperation = AttachmentLoadOperation::CLEAR;
+	m_shadowMapping.m_fbDescr.bake();
+
+	return Error::NONE;
+}
+
 void Indirect::initCacheEntry(U32 cacheEntryIdx)
 {
 	CacheEntry& cacheEntry = m_cacheEntries[cacheEntryIdx];
@@ -540,6 +561,37 @@ void Indirect::populateRenderGraph(RenderingContext& rctx)
 		pass.newDependency({m_ctx.m_gbufferDepthRt, TextureUsageBit::FRAMEBUFFER_ATTACHMENT_READ_WRITE, subresource});
 	}
 
+	// Shadow pass. Optional
+	if(probeToUpdate->m_renderQueues[0]->m_directionalLight.m_uuid
+		&& probeToUpdate->m_renderQueues[0]->m_directionalLight.m_shadowCascadeCount > 0)
+	{
+		for(U i = 0; i < 6; ++i)
+		{
+			ANKI_ASSERT(probeToUpdate->m_renderQueues[i]->m_directionalLight.m_uuid
+						&& probeToUpdate->m_renderQueues[i]->m_directionalLight.m_shadowCascadeCount == 1);
+		}
+
+		// RT
+		m_ctx.m_shadowMapRt = rgraph.newRenderTarget(m_shadowMapping.m_rtDescr);
+
+		// Pass
+		GraphicsRenderPassDescription& pass = rgraph.newGraphicsRenderPass("GI SM");
+		pass.setFramebufferInfo(m_shadowMapping.m_fbDescr, {}, m_ctx.m_shadowMapRt);
+		pass.setWork(
+			[](RenderPassWorkContext& rgraphCtx) {
+				static_cast<Indirect*>(rgraphCtx.m_userData)->runShadowMapping(rgraphCtx.m_commandBuffer);
+			},
+			this,
+			0);
+
+		TextureSubresourceInfo subresource(DepthStencilAspectBit::DEPTH);
+		pass.newDependency({m_ctx.m_shadowMapRt, TextureUsageBit::FRAMEBUFFER_ATTACHMENT_READ_WRITE, subresource});
+	}
+	else
+	{
+		m_ctx.m_shadowMapRt = {};
+	}
+
 	// Light shading passes
 	{
 		Array<RenderPassWorkCallback, 6> callbacks = {{runLightShadingCallback<0>,
@@ -776,4 +828,9 @@ Bool Indirect::findBestCacheEntry(U64 probeUuid, U32& cacheEntryIdxAllocated, Bo
 	return failed;
 }
 
+void Indirect::runShadowMapping(CommandBufferPtr& cmdb)
+{
+	// TODO
+}
+
 } // end namespace anki

src/anki/renderer/Indirect.h

@@ -100,6 +100,13 @@ private:
 		ShaderProgramPtr m_grProg;
 	} m_irradianceToRefl; ///< Apply irradiance back to the reflection.
 
+	class
+	{
+	public:
+		RenderTargetDescription m_rtDescr;
+		FramebufferDescription m_fbDescr;
+	} m_shadowMapping;
+
 	class CacheEntry
 	{
 	public:
@@ -128,6 +135,7 @@ private:
 		RenderTargetHandle m_gbufferDepthRt;
 		RenderTargetHandle m_lightShadingRt;
 		RenderTargetHandle m_irradianceRt;
+		RenderTargetHandle m_shadowMapRt;
 	} m_ctx; ///< Runtime context.
 
 	ANKI_USE_RESULT Error initInternal(const ConfigSet& cfg);
@@ -135,6 +143,7 @@ private:
 	ANKI_USE_RESULT Error initLightShading(const ConfigSet& cfg);
 	ANKI_USE_RESULT Error initIrradiance(const ConfigSet& cfg);
 	ANKI_USE_RESULT Error initIrradianceToRefl(const ConfigSet& cfg);
+	ANKI_USE_RESULT Error initShadowMapping(const ConfigSet& cfg);
 
 	/// Lazily init the cache entry
 	void initCacheEntry(U32 cacheEntryIdx);
@@ -146,6 +155,7 @@ private:
 	Bool findBestCacheEntry(U64 probeUuid, U32& cacheEntryIdx, Bool& cacheEntryFound);
 
 	void runGBuffer(CommandBufferPtr& cmdb);
+	void runShadowMapping(CommandBufferPtr& cmdb);
 	void runLightShading(U32 faceIdx, RenderPassWorkContext& rgraphCtx);
 	void runMipmappingOfLightShading(U32 faceIdx, RenderPassWorkContext& rgraphCtx);
 	void runIrradiance(U32 faceIdx, RenderPassWorkContext& rgraphCtx);