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// main.cpp
#include <slang.h>
#include <slang-com-ptr.h>
using Slang::ComPtr;
#include "gfx/render.h"
#include "gfx/d3d11/render-d3d11.h"
#include "tools/graphics-app-framework/window.h"
using namespace gfx;
#include <string>
#include "gpu-printing.h"
ComPtr<slang::ISession> createSlangSession(gfx::Renderer* renderer)
{
ComPtr<slang::IGlobalSession> slangGlobalSession;
slangGlobalSession.attach(spCreateSession(NULL));
slang::TargetDesc targetDesc;
targetDesc.format = SLANG_DXBC;
targetDesc.profile = spFindProfile(slangGlobalSession, "sm_5_0");
slang::SessionDesc sessionDesc;
sessionDesc.targetCount = 1;
sessionDesc.targets = &targetDesc;
ComPtr<slang::ISession> slangSession;
slangGlobalSession->createSession(sessionDesc, slangSession.writeRef());
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))
{
reportError("%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;
gfx::ApplicationContext* gAppContext;
gfx::Window* gWindow;
RefPtr<gfx::Renderer> gRenderer;
ComPtr<slang::ISession> gSlangSession;
ComPtr<slang::IModule> gSlangModule;
RefPtr<gfx::ShaderProgram> gProgram;
RefPtr<gfx::PipelineLayout> gPipelineLayout;
RefPtr<gfx::PipelineState> gPipelineState;
RefPtr<gfx::DescriptorSet> gDescriptorSet;
Dictionary<int, std::string> gHashedStrings;
GPUPrinting gGPUPrinting;
RefPtr<gfx::ShaderProgram> 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::ShaderProgram::KernelDesc kernelDescs[] =
{
{ gfx::StageType::Compute, code, codeEnd },
};
gfx::ShaderProgram::Desc programDesc;
programDesc.pipelineType = gfx::PipelineType::Compute;
programDesc.kernels = &kernelDescs[0];
programDesc.kernelCount = 2;
auto shaderProgram = gRenderer->createProgram(programDesc);
return shaderProgram;
}
Result execute()
{
WindowDesc windowDesc;
windowDesc.title = "GPU Printing";
windowDesc.width = gWindowWidth;
windowDesc.height = gWindowHeight;
gWindow = createWindow(windowDesc);
gRenderer = createD3D11Renderer();
Renderer::Desc rendererDesc;
rendererDesc.width = gWindowWidth;
rendererDesc.height = gWindowHeight;
{
Result res = gRenderer->initialize(rendererDesc, getPlatformWindowHandle(gWindow));
if(SLANG_FAILED(res)) return res;
}
gSlangSession = createSlangSession(gRenderer);
gSlangModule = compileShaderModuleFromFile(gSlangSession, "kernels.slang");
gProgram = loadComputeProgram(gSlangModule, "computeMain");
if(!gProgram) return SLANG_FAIL;
DescriptorSetLayout::SlotRangeDesc slotRanges[] =
{
DescriptorSetLayout::SlotRangeDesc(DescriptorSlotType::StorageBuffer),
};
DescriptorSetLayout::Desc descriptorSetLayoutDesc;
descriptorSetLayoutDesc.slotRangeCount = 1;
descriptorSetLayoutDesc.slotRanges = &slotRanges[0];
auto descriptorSetLayout = gRenderer->createDescriptorSetLayout(descriptorSetLayoutDesc);
if(!descriptorSetLayout) return SLANG_FAIL;
PipelineLayout::DescriptorSetDesc descriptorSets[] =
{
PipelineLayout::DescriptorSetDesc( descriptorSetLayout ),
};
PipelineLayout::Desc pipelineLayoutDesc;
pipelineLayoutDesc.renderTargetCount = 1;
pipelineLayoutDesc.descriptorSetCount = 1;
pipelineLayoutDesc.descriptorSets = &descriptorSets[0];
auto pipelineLayout = gRenderer->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 = gRenderer->createDescriptorSet(descriptorSetLayout);
if(!descriptorSet) return SLANG_FAIL;
// descriptorSet->setConstantBuffer(0, 0, gConstantBuffer);
gDescriptorSet = descriptorSet;
ComputePipelineStateDesc desc;
desc.pipelineLayout = gPipelineLayout;
desc.program = gProgram;
auto pipelineState = gRenderer->createComputePipelineState(desc);
if(!pipelineState) return SLANG_FAIL;
gPipelineState = pipelineState;
size_t printBufferSize = 4 * 1024; // use a small-ish (4KB) buffer for print output
BufferResource::Desc printBufferDesc;
printBufferDesc.init(printBufferSize);
printBufferDesc.elementSize = sizeof(uint32_t);
printBufferDesc.cpuAccessFlags = Resource::AccessFlag::Read; // | Resource::AccessFlag::Write;
auto printBuffer = gRenderer->createBufferResource(Resource::Usage::UnorderedAccess, printBufferDesc);
ResourceView::Desc printBufferViewDesc;
printBufferViewDesc.type = ResourceView::Type::UnorderedAccess;
auto printBufferView = gRenderer->createBufferView(printBuffer, printBufferViewDesc);
// TODO: need to copy a zero into the start of the print buffer!
gDescriptorSet->setResource(0, 0, printBufferView);
gRenderer->setDescriptorSet(PipelineType::Compute, gPipelineLayout, 0, gDescriptorSet);
gRenderer->setPipelineState(PipelineType::Compute, gPipelineState);
gRenderer->dispatchCompute(1, 1, 1);
// TODO: need to copy from the print buffer to a staging buffer...
auto printBufferData = (uint32_t*) gRenderer->map(printBuffer, MapFlavor::HostRead);
gGPUPrinting.processGPUPrintCommands(printBufferData, printBufferSize);
return SLANG_OK;
}
};
// This "inner" main function is used by the platform abstraction
// layer to deal with differences in how an entry point needs
// to be defined for different platforms.
//
void innerMain(ApplicationContext* context)
{
ExampleProgram app;
if (SLANG_FAILED(app.execute()))
{
return exitApplication(context, 1);
}
}
// This macro instantiates an appropriate main function to
// invoke the `innerMain` above.
//
GFX_CONSOLE_MAIN(innerMain)
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