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// main.cpp
#include "slang-com-ptr.h"
#include "slang.h"
#include <string>
using Slang::ComPtr;
#include "core/slang-basic.h"
#include "examples/example-base/example-base.h"
#include "gpu-printing.h"
#include "platform/window.h"
#include "slang-rhi.h"
#include <slang-rhi/shader-cursor.h>
using namespace rhi;
static const ExampleResources resourceBase("gpu-printing");
ComPtr<slang::ISession> createSlangSession(IDevice* device)
{
ComPtr<slang::ISession> slangSession = device->getSlangSession();
return slangSession;
}
ComPtr<slang::IModule> compileShaderModuleFromFile(
slang::ISession* slangSession,
char const* filePath)
{
ComPtr<slang::IModule> slangModule;
ComPtr<slang::IBlob> diagnosticBlob;
Slang::String path = resourceBase.resolveResource(filePath);
slangModule = slangSession->loadModule(path.getBuffer(), diagnosticBlob.writeRef());
diagnoseIfNeeded(diagnosticBlob);
return slangModule;
}
struct ExampleProgram : public TestBase
{
int gWindowWidth = 640;
int gWindowHeight = 480;
ComPtr<IDevice> gDevice;
ComPtr<slang::ISession> gSlangSession;
ComPtr<slang::IModule> gSlangModule;
ComPtr<IShaderProgram> gProgram;
ComPtr<IComputePipeline> gPipelineState;
Slang::Dictionary<int, std::string> gHashedStrings;
GPUPrinting gGPUPrinting;
ComPtr<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());
if (isTestMode())
{
printEntrypointHashes(1, 1, linkedProgram);
}
gGPUPrinting.loadStrings(linkedProgram->getLayout());
ShaderProgramDesc programDesc = {};
programDesc.slangGlobalScope = linkedProgram;
auto shaderProgram = gDevice->createShaderProgram(programDesc);
return shaderProgram;
}
Result execute(int argc, char* argv[])
{
parseOption(argc, argv);
DeviceDesc deviceDesc;
gDevice = getRHI()->createDevice(deviceDesc);
if (!gDevice)
return SLANG_FAIL;
Slang::String path = resourceBase.resolveResource("kernels.slang");
gSlangSession = createSlangSession(gDevice);
gSlangModule = compileShaderModuleFromFile(gSlangSession, path.getBuffer());
if (!gSlangModule)
return SLANG_FAIL;
gProgram = loadComputeProgram(gSlangModule, "computeMain");
if (!gProgram)
return SLANG_FAIL;
ComputePipelineDesc desc;
desc.program = gProgram;
auto pipelineState = gDevice->createComputePipeline(desc);
if (!pipelineState)
return SLANG_FAIL;
gPipelineState = pipelineState;
size_t printBufferSize = 4 * 1024; // use a small-ish (4KB) buffer for print output
BufferDesc printBufferDesc = {};
printBufferDesc.size = printBufferSize;
printBufferDesc.elementSize = sizeof(uint32_t);
printBufferDesc.usage =
BufferUsage::UnorderedAccess | BufferUsage::CopySource | BufferUsage::CopyDestination;
printBufferDesc.memoryType = MemoryType::DeviceLocal;
auto printBuffer = gDevice->createBuffer(printBufferDesc);
auto queue = gDevice->getQueue(QueueType::Graphics);
auto commandEncoder = queue->createCommandEncoder();
auto computeEncoder = commandEncoder->beginComputePass();
auto rootShaderObject = computeEncoder->bindPipeline(gPipelineState);
auto cursor = ShaderCursor(rootShaderObject);
cursor["gPrintBuffer"].setBinding(printBuffer);
computeEncoder->dispatchCompute(1, 1, 1);
computeEncoder->end();
queue->submit(commandEncoder->finish());
ComPtr<ISlangBlob> blob;
gDevice->readBuffer(printBuffer, 0, printBufferSize, blob.writeRef());
gGPUPrinting.processGPUPrintCommands(blob->getBufferPointer(), printBufferSize);
return SLANG_OK;
}
};
int exampleMain(int argc, char** argv)
{
ExampleProgram app;
if (SLANG_FAILED(app.execute(argc, argv)))
{
return -1;
}
return 0;
}
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