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// shader-renderer-util.cpp
#include "shader-renderer-util.h"
namespace renderer_test {
using namespace Slang;
using Slang::Result;
/* static */ Result ShaderRendererUtil::generateTextureResource(
const InputTextureDesc& inputDesc,
int bindFlags,
IDevice* device,
ComPtr<ITextureResource>& textureOut)
{
TextureData texData;
generateTextureData(texData, inputDesc);
return createTextureResource(inputDesc, texData, bindFlags, device, textureOut);
}
/* static */ Result ShaderRendererUtil::createTextureResource(
const InputTextureDesc& inputDesc,
const TextureData& texData,
int bindFlags,
IDevice* device,
ComPtr<ITextureResource>& textureOut)
{
ITextureResource::Desc textureResourceDesc;
textureResourceDesc.init(IResource::Type::Unknown);
// Default to RGBA_Unorm_UInt8
const Format format = (inputDesc.format == Format::Unknown) ? Format::RGBA_Unorm_UInt8 : inputDesc.format;
textureResourceDesc.format = format;
textureResourceDesc.numMipLevels = texData.mipLevels;
textureResourceDesc.arraySize = inputDesc.arrayLength;
textureResourceDesc.bindFlags = bindFlags;
// It's the same size in all dimensions
switch (inputDesc.dimension)
{
case 1:
{
textureResourceDesc.type = IResource::Type::Texture1D;
textureResourceDesc.size.init(inputDesc.size);
break;
}
case 2:
{
textureResourceDesc.type = inputDesc.isCube ? IResource::Type::TextureCube : IResource::Type::Texture2D;
textureResourceDesc.size.init(inputDesc.size, inputDesc.size);
break;
}
case 3:
{
textureResourceDesc.type = IResource::Type::Texture3D;
textureResourceDesc.size.init(inputDesc.size, inputDesc.size, inputDesc.size);
break;
}
}
const int effectiveArraySize = textureResourceDesc.calcEffectiveArraySize();
const int numSubResources = textureResourceDesc.calcNumSubResources();
IResource::Usage initialUsage = IResource::Usage::GenericRead;
List<ITextureResource::SubresourceData> initSubresources;
int subResourceCounter = 0;
for( int a = 0; a < effectiveArraySize; ++a )
{
for( int m = 0; m < textureResourceDesc.numMipLevels; ++m )
{
int subResourceIndex = subResourceCounter++;
const int mipWidth = ITextureResource::Size::calcMipSize(textureResourceDesc.size.width, m);
const int mipHeight = ITextureResource::Size::calcMipSize(textureResourceDesc.size.width, m);
auto strideY = mipWidth * sizeof(uint32_t);
auto strideZ = mipHeight * strideY;
ITextureResource::SubresourceData subresourceData;
subresourceData.data = texData.dataBuffer[subResourceIndex].getBuffer();
subresourceData.strideY = strideY;
subresourceData.strideZ = strideZ;
initSubresources.add(subresourceData);
}
}
textureOut = device->createTextureResource(IResource::Usage::GenericRead, textureResourceDesc, initSubresources.getBuffer());
return textureOut ? SLANG_OK : SLANG_FAIL;
}
/* static */ Result ShaderRendererUtil::createBufferResource(
const InputBufferDesc& inputDesc,
bool isOutput,
size_t bufferSize,
const void* initData,
IDevice* device,
Slang::ComPtr<IBufferResource>& bufferOut)
{
IResource::Usage initialUsage = IResource::Usage::GenericRead;
IBufferResource::Desc srcDesc;
srcDesc.init(bufferSize);
srcDesc.format = inputDesc.format;
int bindFlags = 0;
if (inputDesc.type == InputBufferType::ConstantBuffer)
{
bindFlags |= IResource::BindFlag::ConstantBuffer;
srcDesc.cpuAccessFlags |= IResource::AccessFlag::Write;
initialUsage = IResource::Usage::ConstantBuffer;
}
else
{
bindFlags |= IResource::BindFlag::UnorderedAccess | IResource::BindFlag::PixelShaderResource | IResource::BindFlag::NonPixelShaderResource;
srcDesc.elementSize = inputDesc.stride;
initialUsage = IResource::Usage::UnorderedAccess;
}
if (isOutput)
{
srcDesc.cpuAccessFlags |= IResource::AccessFlag::Read;
}
srcDesc.bindFlags = bindFlags;
ComPtr<IBufferResource> bufferResource =
device->createBufferResource(initialUsage, srcDesc, initData);
if (!bufferResource)
{
return SLANG_FAIL;
}
bufferOut = bufferResource;
return SLANG_OK;
}
static ISamplerState::Desc _calcSamplerDesc(const InputSamplerDesc& srcDesc)
{
ISamplerState::Desc dstDesc;
if (srcDesc.isCompareSampler)
{
dstDesc.reductionOp = TextureReductionOp::Comparison;
dstDesc.comparisonFunc = ComparisonFunc::Less;
}
return dstDesc;
}
ComPtr<ISamplerState> _createSamplerState(IDevice* device,
const InputSamplerDesc& srcDesc)
{
return device->createSamplerState(_calcSamplerDesc(srcDesc));
}
} // renderer_test
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