implement transform feedback

src/Cafe/HW/Latte/Core/LatteShader.cpp

@@ -9,6 +9,7 @@
 #include "Cafe/HW/Latte/Renderer/Vulkan/VulkanRenderer.h"
 #include "Cafe/OS/libs/gx2/GX2.h" // todo - remove dependency
 #include "Cafe/GraphicPack/GraphicPack2.h"
+#include "HW/Latte/Renderer/Renderer.h"
 #include "util/helpers/StringParser.h"
 #include "config/ActiveSettings.h"
 #include "Cafe/GameProfile/GameProfile.h"
@@ -688,9 +689,9 @@ void LatteShader_GetDecompilerOptions(LatteDecompilerOptions& options, LatteCons
 {
 	options.usesGeometryShader = geometryShaderEnabled;
 	options.spirvInstrinsics.hasRoundingModeRTEFloat32 = false;
+	options.useTFViaSSBO = g_renderer->UseTFViaSSBO();
 	if (g_renderer->GetType() == RendererAPI::Vulkan)
 	{
-		options.useTFViaSSBO = VulkanRenderer::GetInstance()->UseTFViaSSBO();
 		options.spirvInstrinsics.hasRoundingModeRTEFloat32 = VulkanRenderer::GetInstance()->HasSPRIVRoundingModeRTE32();
 	}
 	options.strictMul = g_current_game_profile->GetAccurateShaderMul() != AccurateShaderMulOption::False;

src/Cafe/HW/Latte/LegacyShaderDecompiler/LatteDecompilerEmitMSL.cpp

@@ -2752,9 +2752,9 @@ static void _emitTEXGetGradientsHV(LatteDecompilerShaderContext* shaderContext,
 
 	const char* funcName;
 	if (texInstruction->opcode == GPU7_TEX_INST_GET_GRADIENTS_H)
-		funcName = "dFdx";
+		funcName = "dfdx";
 	else
-		funcName = "dFdy";
+		funcName = "dfdy";
 
 	src->add(" = ");
 
@@ -3273,15 +3273,8 @@ static void _emitCFRingWriteCode(LatteDecompilerShaderContext* shaderContext, La
 				if ((cfInstruction->memWriteCompMask&(1 << i)) == 0)
 					continue;
 
-				if (shaderContext->options->useTFViaSSBO)
-				{
 				uint32 u32Offset = streamWrite->exportArrayBase + i;
-					src->addFmt("sb_buffer[sbBase{} + {}]", streamWrite->bufferIndex, u32Offset);
+				src->addFmt("sb[sbBase{} + {}]", streamWrite->bufferIndex, u32Offset);
-				}
-				else
-				{
-					src->addFmt("sb{}[{}]", streamWrite->bufferIndex, streamWrite->exportArrayBase + i);
-				}
 
 				src->add(" = ");
 
@@ -3393,15 +3386,8 @@ static void _emitStreamWriteCode(LatteDecompilerShaderContext* shaderContext, La
 			if ((cfInstruction->memWriteCompMask&(1 << i)) == 0)
 				continue;
 
-			if (shaderContext->options->useTFViaSSBO)
-			{
 			uint32 u32Offset = cfInstruction->exportArrayBase + i;
-				src->addFmt("sb_buffer[sbBase{} + {}]", streamoutBufferIndex, u32Offset);
+			src->addFmt("sb[sbBase{} + {}]", streamoutBufferIndex, u32Offset);
-			}
-			else
-			{
-				src->addFmt("sb{}[{}]", streamoutBufferIndex, cfInstruction->exportArrayBase + i);
-			}
 
 			src->add(" = ");
 
@@ -3595,8 +3581,6 @@ void LatteDecompiler_emitClauseCodeMSL(LatteDecompilerShaderContext* shaderConte
 		// emit vertex
 		src->add("EmitVertex();" _CRLF);
 		// increment transform feedback pointer
-		if (shaderContext->analyzer.useSSBOForStreamout)
-		{
 		for (sint32 i = 0; i < LATTE_NUM_STREAMOUT_BUFFER; i++)
 		{
 			if (!shaderContext->output->streamoutBufferWriteMask[i])
@@ -3604,7 +3588,6 @@ void LatteDecompiler_emitClauseCodeMSL(LatteDecompilerShaderContext* shaderConte
 			cemu_assert_debug((shaderContext->output->streamoutBufferStride[i] & 3) == 0);
 			src->addFmt("sbBase{} += {};" _CRLF, i, shaderContext->output->streamoutBufferStride[i] / 4);
 		}
-		}
 
 		if( shaderContext->analyzer.modifiesPixelActiveState )
 			src->add("}" _CRLF);
@@ -3970,7 +3953,7 @@ void LatteDecompiler_emitMSLShader(LatteDecompilerShaderContext* shaderContext,
 		src->addFmt("float cubeMapArrayIndex{} = 0.0;" _CRLF, i);
 	}
 	// init base offset for streamout buffer writes
-	if (shaderContext->analyzer.useSSBOForStreamout && (shader->shaderType == LatteConst::ShaderType::Vertex || shader->shaderType == LatteConst::ShaderType::Geometry))
+	if (shader->shaderType == LatteConst::ShaderType::Vertex || shader->shaderType == LatteConst::ShaderType::Geometry)
 	{
 		for (sint32 i = 0; i < LATTE_NUM_STREAMOUT_BUFFER; i++)
 		{

src/Cafe/HW/Latte/LegacyShaderDecompiler/LatteDecompilerEmitMSLHeader.hpp

@@ -94,8 +94,7 @@ namespace LatteDecompiler
 			uniformCurrentOffset += 8;
 		}
 		// define verticesPerInstance + streamoutBufferBaseX
-		if (decompilerContext->analyzer.useSSBOForStreamout &&
+		if ((shader->shaderType == LatteConst::ShaderType::Vertex && decompilerContext->options->usesGeometryShader == false) ||
-			(shader->shaderType == LatteConst::ShaderType::Vertex && decompilerContext->options->usesGeometryShader == false) ||
 			(shader->shaderType == LatteConst::ShaderType::Geometry))
 		{
 			src->add("int verticesPerInstance;" _CRLF);
@@ -251,8 +250,6 @@ namespace LatteDecompiler
 		{
 		    _emitAttributes(decompilerContext);
 			_emitVSOutputs(decompilerContext);
-
-			// TODO: transform feedback
 		}
 		else if (decompilerContext->shaderType == LatteConst::ShaderType::Pixel)
 		{
@@ -379,6 +376,13 @@ namespace LatteDecompiler
 		case LatteConst::ShaderType::Vertex:
             src->add(", uint vid [[vertex_id]]");
             src->add(", uint iid [[instance_id]]");
+
+			// streamout buffer (transform feedback)
+			if (decompilerContext->analyzer.hasStreamoutEnable && decompilerContext->analyzer.hasStreamoutWrite)
+			{
+				src->addFmt(", device int* sb [[buffer({})]]" _CRLF, decompilerContext->output->resourceMappingVK.getTFStorageBufferBindingPoint());
+			}
+
             break;
         case LatteConst::ShaderType::Pixel:
             src->add(", bool frontFacing [[front_facing]]");

src/Cafe/HW/Latte/Renderer/Metal/MetalRenderer.cpp

@@ -16,6 +16,7 @@
 #include "Cemu/Logging/CemuDebugLogging.h"
 #include "HW/Latte/Core/Latte.h"
 #include "HW/Latte/ISA/LatteReg.h"
+#include "Metal/MTLResource.hpp"
 #include "Metal/MTLTypes.hpp"
 #include "gui/guiWrapper.h"
 
@@ -39,6 +40,9 @@ MetalRenderer::MetalRenderer()
     // Texture readback
     m_readbackBuffer = m_device->newBuffer(TEXTURE_READBACK_SIZE, MTL::StorageModeShared);
 
+    // Transform feedback
+    m_xfbRingBuffer = m_device->newBuffer(LatteStreamout_GetRingBufferSize(), MTL::StorageModeShared);
+
     // Initialize state
     for (uint32 i = 0; i < (uint32)LatteConst::ShaderType::TotalCount; i++)
     {
@@ -1185,7 +1189,21 @@ void MetalRenderer::BindStageResources(MTL::RenderCommandEncoder* renderCommandE
 	// Storage buffer
 	if (shader->resourceMapping.tfStorageBindingPoint >= 0)
 	{
-		debug_printf("storage buffer not implemented, index: %i\n", shader->resourceMapping.tfStorageBindingPoint);
+	   switch (shader->shaderType)
+        {
+        case LatteConst::ShaderType::Vertex:
+        {
+     			renderCommandEncoder->setVertexBuffer(m_xfbRingBuffer, 0, shader->resourceMapping.tfStorageBindingPoint);
+     			break;
+        }
+        case LatteConst::ShaderType::Pixel:
+        {
+            renderCommandEncoder->setFragmentBuffer(m_xfbRingBuffer, 0, shader->resourceMapping.tfStorageBindingPoint);
+     			break;
+        }
+        default:
+     			UNREACHABLE;
+        }
 	}
 }
 

src/Cafe/HW/Latte/Renderer/Metal/MetalRenderer.h

@@ -147,6 +147,7 @@ public:
 	    cemuLog_log(LogType::MetalLogging, "Imgui is not yet supported on Metal");
 	};
 
+	bool UseTFViaSSBO() const override { return true; }
 	void AppendOverlayDebugInfo() override;
 
 	// rendertarget
@@ -265,6 +266,9 @@ private:
 	MTL::Buffer* m_readbackBuffer;
 	uint32 m_readbackBufferWriteOffset = 0;
 
+	// Transform feedback
+	MTL::Buffer* m_xfbRingBuffer;
+
 	// Active objects
 	MTL::CommandBuffer* m_commandBuffer = nullptr;
 	MetalEncoderType m_encoderType = MetalEncoderType::None;

src/Cafe/HW/Latte/Renderer/Renderer.h

@@ -85,6 +85,7 @@ public:
 	virtual void DeleteFontTextures() = 0;
 
 	GfxVendor GetVendor() const { return m_vendor; }
+	virtual bool UseTFViaSSBO() const { return false; }
 	virtual void AppendOverlayDebugInfo() = 0;
 
 	// rendertarget

src/Cafe/HW/Latte/Renderer/Vulkan/VulkanRenderer.h

@@ -278,7 +278,6 @@ public:
 	void* texture_acquireTextureUploadBuffer(uint32 size) override;
 	void texture_releaseTextureUploadBuffer(uint8* mem) override;
 
-
 	TextureDecoder* texture_chooseDecodedFormat(Latte::E_GX2SURFFMT format, bool isDepth, Latte::E_DIM dim, uint32 width, uint32 height) override;
 
 	void texture_clearSlice(LatteTexture* hostTexture, sint32 sliceIndex, sint32 mipIndex) override;
@@ -512,6 +511,8 @@ private:
 	void DeleteFontTextures() override;
 	bool BeginFrame(bool mainWindow) override;
 
+	bool UseTFViaSSBO() const override { return m_featureControl.mode.useTFEmulationViaSSBO; }
+
 	// drawcall emulation
 	PipelineInfo* draw_createGraphicsPipeline(uint32 indexCount);
 	PipelineInfo* draw_getOrCreateGraphicsPipeline(uint32 indexCount);
@@ -921,7 +922,6 @@ private:
 
 public:
 	bool GetDisableMultithreadedCompilation() const { return m_featureControl.disableMultithreadedCompilation; }
-	bool UseTFViaSSBO() const { return m_featureControl.mode.useTFEmulationViaSSBO; }
 	bool HasSPRIVRoundingModeRTE32() const { return m_featureControl.shaderFloatControls.shaderRoundingModeRTEFloat32; }
 	bool IsDebugUtilsEnabled() const { return m_featureControl.debugMarkersSupported && m_featureControl.instanceExtensions.debug_utils; }