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// main.cpp
#include <slang.h>
#include <slang-com-ptr.h>
using Slang::ComPtr;
#include "slang-gfx.h"
#include "tools/platform/window.h"
#include "source/core/slang-basic.h"
using namespace gfx;
#include <string>
#include "gpu-printing.h"
ComPtr<slang::ISession> createSlangSession(gfx::IDevice* device)
{
ComPtr<slang::ISession> slangSession = device->getSlangSession();
return slangSession;
}
ComPtr<slang::IModule> compileShaderModuleFromFile(slang::ISession* slangSession, char const* filePath)
{
SlangCompileRequest* slangRequest = nullptr;
slangSession->createCompileRequest(&slangRequest);
int translationUnitIndex = spAddTranslationUnit(slangRequest, SLANG_SOURCE_LANGUAGE_SLANG, filePath);
spAddTranslationUnitSourceFile(slangRequest, translationUnitIndex, filePath);
const SlangResult compileRes = spCompile(slangRequest);
if(auto diagnostics = spGetDiagnosticOutput(slangRequest))
{
printf("%s", diagnostics);
}
if(SLANG_FAILED(compileRes))
{
spDestroyCompileRequest(slangRequest);
return ComPtr<slang::IModule>();
}
ComPtr<slang::IModule> slangModule;
spCompileRequest_getModule(slangRequest, translationUnitIndex, slangModule.writeRef());
return slangModule;
}
struct ExampleProgram
{
int gWindowWidth = 640;
int gWindowHeight = 480;
ComPtr<gfx::IDevice> gDevice;
ComPtr<slang::ISession> gSlangSession;
ComPtr<slang::IModule> gSlangModule;
ComPtr<gfx::IShaderProgram> gProgram;
ComPtr<gfx::IPipelineLayout> gPipelineLayout;
ComPtr<gfx::IPipelineState> gPipelineState;
ComPtr<gfx::IDescriptorSet> gDescriptorSet;
Slang::Dictionary<int, std::string> gHashedStrings;
GPUPrinting gGPUPrinting;
ComPtr<gfx::IShaderProgram> loadComputeProgram(slang::IModule* slangModule, char const* entryPointName)
{
ComPtr<slang::IEntryPoint> entryPoint;
slangModule->findEntryPointByName(entryPointName, entryPoint.writeRef());
ComPtr<slang::IComponentType> linkedProgram;
entryPoint->link(linkedProgram.writeRef());
gGPUPrinting.loadStrings(linkedProgram->getLayout());
ComPtr<ISlangBlob> codeBlob;
linkedProgram->getEntryPointCode(0, 0, codeBlob.writeRef());
char const* code = (char const*) codeBlob->getBufferPointer();
char const* codeEnd = code + codeBlob->getBufferSize();
gfx::IShaderProgram::KernelDesc kernelDescs[] =
{
{ gfx::StageType::Compute, code, codeEnd },
};
gfx::IShaderProgram::Desc programDesc = {};
programDesc.pipelineType = gfx::PipelineType::Compute;
programDesc.kernels = &kernelDescs[0];
programDesc.kernelCount = 2;
auto shaderProgram = gDevice->createProgram(programDesc);
return shaderProgram;
}
Result execute()
{
IDevice::Desc deviceDesc;
Result res = gfxCreateDevice(&deviceDesc, gDevice.writeRef());
if(SLANG_FAILED(res)) return res;
gSlangSession = createSlangSession(gDevice);
gSlangModule = compileShaderModuleFromFile(gSlangSession, "kernels.slang");
gProgram = loadComputeProgram(gSlangModule, "computeMain");
if(!gProgram) return SLANG_FAIL;
IDescriptorSetLayout::SlotRangeDesc slotRanges[] =
{
IDescriptorSetLayout::SlotRangeDesc(DescriptorSlotType::StorageBuffer),
};
IDescriptorSetLayout::Desc descriptorSetLayoutDesc;
descriptorSetLayoutDesc.slotRangeCount = 1;
descriptorSetLayoutDesc.slotRanges = &slotRanges[0];
auto descriptorSetLayout = gDevice->createDescriptorSetLayout(descriptorSetLayoutDesc);
if(!descriptorSetLayout) return SLANG_FAIL;
IPipelineLayout::DescriptorSetDesc descriptorSets[] =
{
IPipelineLayout::DescriptorSetDesc( descriptorSetLayout ),
};
IPipelineLayout::Desc pipelineLayoutDesc;
pipelineLayoutDesc.renderTargetCount = 1;
pipelineLayoutDesc.descriptorSetCount = 1;
pipelineLayoutDesc.descriptorSets = &descriptorSets[0];
auto pipelineLayout = gDevice->createPipelineLayout(pipelineLayoutDesc);
if(!pipelineLayout) return SLANG_FAIL;
gPipelineLayout = pipelineLayout;
// Once we have the descriptor set layout, we can allocate
// and fill in a descriptor set to hold our parameters.
//
auto descriptorSet =
gDevice->createDescriptorSet(descriptorSetLayout, IDescriptorSet::Flag::Transient);
if(!descriptorSet) return SLANG_FAIL;
gDescriptorSet = descriptorSet;
ComputePipelineStateDesc desc;
desc.pipelineLayout = gPipelineLayout;
desc.program = gProgram;
auto pipelineState = gDevice->createComputePipelineState(desc);
if(!pipelineState) return SLANG_FAIL;
gPipelineState = pipelineState;
size_t printBufferSize = 4 * 1024; // use a small-ish (4KB) buffer for print output
IBufferResource::Desc printBufferDesc;
printBufferDesc.init(printBufferSize);
printBufferDesc.elementSize = sizeof(uint32_t);
printBufferDesc.cpuAccessFlags = IResource::AccessFlag::Read; // | Resource::AccessFlag::Write;
auto printBuffer =
gDevice->createBufferResource(IResource::Usage::UnorderedAccess, printBufferDesc);
IResourceView::Desc printBufferViewDesc;
printBufferViewDesc.type = IResourceView::Type::UnorderedAccess;
auto printBufferView = gDevice->createBufferView(printBuffer, printBufferViewDesc);
ICommandQueue::Desc queueDesc = {ICommandQueue::QueueType::Graphics};
auto queue = gDevice->createCommandQueue(queueDesc);
auto commandBuffer = queue->createCommandBuffer();
auto encoder = commandBuffer->encodeComputeCommands();
// TODO: need to copy a zero into the start of the print buffer!
gDescriptorSet->setResource(0, 0, printBufferView);
encoder->setDescriptorSet(gPipelineLayout, 0, gDescriptorSet);
encoder->setPipelineState(gPipelineState);
encoder->dispatchCompute(1, 1, 1);
encoder->endEncoding();
commandBuffer->close();
queue->executeCommandBuffer(commandBuffer);
// TODO: need to copy from the print buffer to a staging buffer...
ComPtr<ISlangBlob> blob;
gDevice->readBufferResource(printBuffer, 0, printBufferSize, blob.writeRef());
gGPUPrinting.processGPUPrintCommands(blob->getBufferPointer(), printBufferSize);
return SLANG_OK;
}
};
int main()
{
ExampleProgram app;
if (SLANG_FAILED(app.execute()))
{
return -1;
}
return 0;
}
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