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crossxtex/DirectXTex/BCDirectCompute.cpp
Chuck Walbourn 1b27a1b819 BC7 compressor optimziation for only using mode 6
2016-09-20 16:40:49 -07:00

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//-------------------------------------------------------------------------------------
// BCDirectCompute.cpp
//
// Direct3D 11 Compute Shader BC Compressor
//
// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
// PARTICULAR PURPOSE.
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//-------------------------------------------------------------------------------------
#include "directxtexp.h"
#include "BCDirectCompute.h"
#if defined(_DEBUG) || defined(PROFILE)
#pragma comment(lib,"dxguid.lib")
#endif
using namespace DirectX;
using Microsoft::WRL::ComPtr;
namespace
{
#include "Shaders\Compiled\BC7Encode_EncodeBlockCS.inc"
#include "Shaders\Compiled\BC7Encode_TryMode02CS.inc"
#include "Shaders\Compiled\BC7Encode_TryMode137CS.inc"
#include "Shaders\Compiled\BC7Encode_TryMode456CS.inc"
#include "Shaders\Compiled\BC6HEncode_EncodeBlockCS.inc"
#include "Shaders\Compiled\BC6HEncode_TryModeG10CS.inc"
#include "Shaders\Compiled\BC6HEncode_TryModeLE10CS.inc"
struct BufferBC6HBC7
{
UINT color[4];
};
struct ConstantsBC6HBC7
{
UINT tex_width;
UINT num_block_x;
UINT format;
UINT mode_id;
UINT start_block_id;
UINT num_total_blocks;
float alpha_weight;
UINT reserved;
};
static_assert( sizeof(ConstantsBC6HBC7) == sizeof(UINT)*8, "Constant buffer size mismatch" );
inline void RunComputeShader( ID3D11DeviceContext* pContext,
ID3D11ComputeShader* shader,
ID3D11ShaderResourceView** pSRVs,
UINT srvCount,
ID3D11Buffer* pCB,
ID3D11UnorderedAccessView* pUAV,
UINT X )
{
// Force UAV to nullptr before setting SRV since we are swapping buffers
ID3D11UnorderedAccessView* nullUAV = nullptr;
pContext->CSSetUnorderedAccessViews( 0, 1, &nullUAV, nullptr );
pContext->CSSetShader( shader, nullptr, 0 );
pContext->CSSetShaderResources( 0, srvCount, pSRVs );
pContext->CSSetUnorderedAccessViews( 0, 1, &pUAV, nullptr );
pContext->CSSetConstantBuffers( 0, 1, &pCB );
pContext->Dispatch( X, 1, 1 );
}
inline void ResetContext( ID3D11DeviceContext* pContext )
{
ID3D11UnorderedAccessView* nullUAV = nullptr;
pContext->CSSetUnorderedAccessViews( 0, 1, &nullUAV, nullptr );
ID3D11ShaderResourceView* nullSRV[3] = { nullptr, nullptr, nullptr };
pContext->CSSetShaderResources( 0, 3, nullSRV );
ID3D11Buffer* nullBuffer[1] = { nullptr };
pContext->CSSetConstantBuffers( 0, 1, nullBuffer );
}
};
GPUCompressBC::GPUCompressBC() :
m_bcformat(DXGI_FORMAT_UNKNOWN),
m_srcformat(DXGI_FORMAT_UNKNOWN),
m_alphaWeight(1.f),
m_width(0),
m_height(0)
{
}
//-------------------------------------------------------------------------------------
_Use_decl_annotations_
HRESULT GPUCompressBC::Initialize(ID3D11Device* pDevice)
{
if (!pDevice)
return E_INVALIDARG;
// Check for DirectCompute support
D3D_FEATURE_LEVEL fl = pDevice->GetFeatureLevel();
if (fl < D3D_FEATURE_LEVEL_10_0)
{
// DirectCompute not supported on Feature Level 9.x hardware
return HRESULT_FROM_WIN32(ERROR_NOT_SUPPORTED);
}
if (fl < D3D_FEATURE_LEVEL_11_0)
{
// DirectCompute support on Feature Level 10.x hardware is optional, and this function needs it
D3D11_FEATURE_DATA_D3D10_X_HARDWARE_OPTIONS hwopts;
HRESULT hr = pDevice->CheckFeatureSupport(D3D11_FEATURE_D3D10_X_HARDWARE_OPTIONS, &hwopts, sizeof(hwopts));
if (FAILED(hr))
{
memset(&hwopts, 0, sizeof(hwopts));
}
if (!hwopts.ComputeShaders_Plus_RawAndStructuredBuffers_Via_Shader_4_x)
{
return HRESULT_FROM_WIN32(ERROR_NOT_SUPPORTED);
}
}
// Save a device reference and obtain immediate context
m_device = pDevice;
pDevice->GetImmediateContext(m_context.ReleaseAndGetAddressOf());
assert(m_context);
//--- Create compute shader library: BC6H -----------------------------------------
// Modes 11-14
HRESULT hr = pDevice->CreateComputeShader(BC6HEncode_TryModeG10CS, sizeof(BC6HEncode_TryModeG10CS), nullptr, m_BC6H_tryModeG10CS.ReleaseAndGetAddressOf());
if (FAILED(hr))
return hr;
// Modes 1-10
hr = pDevice->CreateComputeShader(BC6HEncode_TryModeLE10CS, sizeof(BC6HEncode_TryModeLE10CS), nullptr, m_BC6H_tryModeLE10CS.ReleaseAndGetAddressOf());
if (FAILED(hr))
return hr;
// Encode
hr = pDevice->CreateComputeShader(BC6HEncode_EncodeBlockCS, sizeof(BC6HEncode_EncodeBlockCS), nullptr, m_BC6H_encodeBlockCS.ReleaseAndGetAddressOf());
if (FAILED(hr))
return hr;
//--- Create compute shader library: BC7 ------------------------------------------
// Modes 4, 5, 6
hr = pDevice->CreateComputeShader(BC7Encode_TryMode456CS, sizeof(BC7Encode_TryMode456CS), nullptr, m_BC7_tryMode456CS.ReleaseAndGetAddressOf());
if (FAILED(hr))
return hr;
// Modes 1, 3, 7
hr = pDevice->CreateComputeShader(BC7Encode_TryMode137CS, sizeof(BC7Encode_TryMode137CS), nullptr, m_BC7_tryMode137CS.ReleaseAndGetAddressOf());
if (FAILED(hr))
return hr;
// Modes 0, 2
hr = pDevice->CreateComputeShader(BC7Encode_TryMode02CS, sizeof(BC7Encode_TryMode02CS), nullptr, m_BC7_tryMode02CS.ReleaseAndGetAddressOf());
if (FAILED(hr))
return hr;
// Encode
hr = pDevice->CreateComputeShader(BC7Encode_EncodeBlockCS, sizeof(BC7Encode_EncodeBlockCS), nullptr, m_BC7_encodeBlockCS.ReleaseAndGetAddressOf());
if (FAILED(hr))
return hr;
return S_OK;
}
//-------------------------------------------------------------------------------------
HRESULT GPUCompressBC::Prepare(size_t width, size_t height, DWORD flags, DXGI_FORMAT format, float alphaWeight)
{
if (!width || !height || alphaWeight < 0.f)
return E_INVALIDARG;
if ((width > UINT32_MAX) || (height > UINT32_MAX))
return E_INVALIDARG;
m_width = width;
m_height = height;
m_alphaWeight = alphaWeight;
if (flags & TEX_COMPRESS_BC7_QUICK)
{
m_bc7_mode02 = false;
m_bc7_mode137 = false;
}
else
{
m_bc7_mode02 = (flags & TEX_COMPRESS_BC7_USE_3SUBSETS) != 0;
m_bc7_mode137 = true;
}
size_t xblocks = std::max<size_t>(1, (width + 3) >> 2);
size_t yblocks = std::max<size_t>(1, (height + 3) >> 2);
size_t num_blocks = xblocks * yblocks;
switch (format)
{
// BC6H GPU compressor takes RGBAF32 as input
case DXGI_FORMAT_BC6H_TYPELESS:
case DXGI_FORMAT_BC6H_UF16:
case DXGI_FORMAT_BC6H_SF16:
m_srcformat = DXGI_FORMAT_R32G32B32A32_FLOAT;
break;
// BC7 GPU compressor takes RGBA32 as input
case DXGI_FORMAT_BC7_TYPELESS:
case DXGI_FORMAT_BC7_UNORM:
m_srcformat = DXGI_FORMAT_R8G8B8A8_UNORM;
break;
case DXGI_FORMAT_BC7_UNORM_SRGB:
m_srcformat = DXGI_FORMAT_R8G8B8A8_UNORM_SRGB;
break;
default:
m_bcformat = m_srcformat = DXGI_FORMAT_UNKNOWN;
return HRESULT_FROM_WIN32(ERROR_NOT_SUPPORTED);
}
m_bcformat = format;
auto pDevice = m_device.Get();
if (!pDevice)
return E_POINTER;
// Create structured buffers
size_t bufferSize = num_blocks * sizeof(BufferBC6HBC7);
{
D3D11_BUFFER_DESC desc = {};
desc.BindFlags = D3D11_BIND_UNORDERED_ACCESS | D3D11_BIND_SHADER_RESOURCE;
desc.Usage = D3D11_USAGE_DEFAULT;
desc.MiscFlags = D3D11_RESOURCE_MISC_BUFFER_STRUCTURED;
desc.StructureByteStride = sizeof(BufferBC6HBC7);
desc.ByteWidth = static_cast<UINT>(bufferSize);
HRESULT hr = pDevice->CreateBuffer(&desc, nullptr, m_output.ReleaseAndGetAddressOf());
if (FAILED(hr))
{
return hr;
}
hr = pDevice->CreateBuffer(&desc, nullptr, m_err1.ReleaseAndGetAddressOf());
if (FAILED(hr))
{
return hr;
}
hr = pDevice->CreateBuffer(&desc, nullptr, m_err2.ReleaseAndGetAddressOf());
if (FAILED(hr))
{
return hr;
}
}
// Create staging output buffer
{
D3D11_BUFFER_DESC desc = {};
desc.Usage = D3D11_USAGE_STAGING;
desc.CPUAccessFlags = D3D11_CPU_ACCESS_READ;
desc.ByteWidth = static_cast<UINT>(bufferSize);
HRESULT hr = pDevice->CreateBuffer(&desc, nullptr, m_outputCPU.ReleaseAndGetAddressOf());
if (FAILED(hr))
{
return hr;
}
}
// Create constant buffer
{
D3D11_BUFFER_DESC desc = {};
desc.BindFlags = D3D11_BIND_CONSTANT_BUFFER;
desc.Usage = D3D11_USAGE_DYNAMIC;
desc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
desc.ByteWidth = sizeof(ConstantsBC6HBC7);
HRESULT hr = pDevice->CreateBuffer(&desc, nullptr, m_constBuffer.ReleaseAndGetAddressOf());
if (FAILED(hr))
{
return hr;
}
}
// Create shader resource views
{
D3D11_SHADER_RESOURCE_VIEW_DESC desc = {};
desc.Buffer.NumElements = static_cast<UINT>(num_blocks);
desc.ViewDimension = D3D11_SRV_DIMENSION_BUFFER;
HRESULT hr = pDevice->CreateShaderResourceView(m_err1.Get(), &desc, m_err1SRV.ReleaseAndGetAddressOf());
if (FAILED(hr))
{
return hr;
}
hr = pDevice->CreateShaderResourceView(m_err2.Get(), &desc, m_err2SRV.ReleaseAndGetAddressOf());
if (FAILED(hr))
{
return hr;
}
}
// Create unordered access views
{
D3D11_UNORDERED_ACCESS_VIEW_DESC desc = {};
desc.Buffer.NumElements = static_cast<UINT>(num_blocks);
desc.ViewDimension = D3D11_UAV_DIMENSION_BUFFER;
HRESULT hr = pDevice->CreateUnorderedAccessView(m_output.Get(), &desc, m_outputUAV.ReleaseAndGetAddressOf());
if (FAILED(hr))
{
return hr;
}
hr = pDevice->CreateUnorderedAccessView(m_err1.Get(), &desc, m_err1UAV.ReleaseAndGetAddressOf());
if (FAILED(hr))
{
return hr;
}
hr = pDevice->CreateUnorderedAccessView(m_err2.Get(), &desc, m_err2UAV.ReleaseAndGetAddressOf());
if (FAILED(hr))
{
return hr;
}
}
return S_OK;
}
//-------------------------------------------------------------------------------------
HRESULT GPUCompressBC::Compress(const Image& srcImage, const Image& destImage)
{
if (!srcImage.pixels || !destImage.pixels)
return E_INVALIDARG;
if (srcImage.width != destImage.width
|| srcImage.height != destImage.height
|| srcImage.width != m_width
|| srcImage.height != m_height
|| srcImage.format != m_srcformat
|| destImage.format != m_bcformat)
{
return E_UNEXPECTED;
}
//--- Create input texture --------------------------------------------------------
auto pDevice = m_device.Get();
if (!pDevice)
return E_POINTER;
// We need to avoid the hardware doing additional colorspace conversion
DXGI_FORMAT inputFormat = (m_srcformat == DXGI_FORMAT_R8G8B8A8_UNORM_SRGB) ? DXGI_FORMAT_R8G8B8A8_UNORM : m_srcformat;
ComPtr<ID3D11Texture2D> sourceTex;
{
D3D11_TEXTURE2D_DESC desc = {};
desc.Width = static_cast<UINT>(srcImage.width);
desc.Height = static_cast<UINT>(srcImage.height);
desc.MipLevels = 1;
desc.ArraySize = 1;
desc.Format = inputFormat;
desc.SampleDesc.Count = 1;
desc.Usage = D3D11_USAGE_DEFAULT;
desc.BindFlags = D3D11_BIND_SHADER_RESOURCE;
D3D11_SUBRESOURCE_DATA initData;
initData.pSysMem = srcImage.pixels;
initData.SysMemPitch = static_cast<DWORD>(srcImage.rowPitch);
initData.SysMemSlicePitch = static_cast<DWORD>(srcImage.slicePitch);
HRESULT hr = pDevice->CreateTexture2D(&desc, &initData, sourceTex.GetAddressOf());
if (FAILED(hr))
{
return hr;
}
}
ComPtr<ID3D11ShaderResourceView> sourceSRV;
{
D3D11_SHADER_RESOURCE_VIEW_DESC desc = {};
desc.Texture2D.MipLevels = 1;
desc.Format = inputFormat;
desc.ViewDimension = D3D11_SRV_DIMENSION_TEXTURE2D;
HRESULT hr = pDevice->CreateShaderResourceView(sourceTex.Get(), &desc, sourceSRV.GetAddressOf());
if (FAILED(hr))
{
return hr;
}
}
//--- Compress using DirectCompute ------------------------------------------------
bool isbc7 = false;
switch (m_bcformat)
{
case DXGI_FORMAT_BC6H_TYPELESS:
case DXGI_FORMAT_BC6H_UF16:
case DXGI_FORMAT_BC6H_SF16:
break;
case DXGI_FORMAT_BC7_TYPELESS:
case DXGI_FORMAT_BC7_UNORM:
case DXGI_FORMAT_BC7_UNORM_SRGB:
isbc7 = true;
break;
default:
return E_UNEXPECTED;
}
const UINT MAX_BLOCK_BATCH = 64;
auto pContext = m_context.Get();
if (!pContext)
return E_UNEXPECTED;
size_t xblocks = std::max<size_t>(1, (m_width + 3) >> 2);
size_t yblocks = std::max<size_t>(1, (m_height + 3) >> 2);
UINT num_total_blocks = static_cast<UINT>(xblocks * yblocks);
UINT num_blocks = num_total_blocks;
int start_block_id = 0;
while (num_blocks > 0)
{
UINT n = std::min<UINT>(num_blocks, MAX_BLOCK_BATCH);
UINT uThreadGroupCount = n;
{
D3D11_MAPPED_SUBRESOURCE mapped;
HRESULT hr = pContext->Map(m_constBuffer.Get(), 0, D3D11_MAP_WRITE_DISCARD, 0, &mapped);
if (FAILED(hr))
return hr;
ConstantsBC6HBC7 param;
param.tex_width = static_cast<UINT>(srcImage.width);
param.num_block_x = static_cast<UINT>(xblocks);
param.format = m_bcformat;
param.mode_id = 0;
param.start_block_id = start_block_id;
param.num_total_blocks = num_total_blocks;
param.alpha_weight = m_alphaWeight;
memcpy(mapped.pData, &param, sizeof(param));
pContext->Unmap(m_constBuffer.Get(), 0);
}
if (isbc7)
{
//--- BC7 -----------------------------------------------------------------
ID3D11ShaderResourceView* pSRVs[] = { sourceSRV.Get(), nullptr };
RunComputeShader(pContext, m_BC7_tryMode456CS.Get(), pSRVs, 2, m_constBuffer.Get(),
m_err1UAV.Get(), std::max<UINT>((uThreadGroupCount + 3) / 4, 1));
if (m_bc7_mode137)
{
for (UINT i = 0; i < 3; ++i)
{
static const UINT modes[] = { 1, 3, 7 };
// Mode 1: err1 -> err2
// Mode 3: err2 -> err1
// Mode 7: err1 -> err2
{
D3D11_MAPPED_SUBRESOURCE mapped;
HRESULT hr = pContext->Map(m_constBuffer.Get(), 0, D3D11_MAP_WRITE_DISCARD, 0, &mapped);
if (FAILED(hr))
{
ResetContext(pContext);
return hr;
}
ConstantsBC6HBC7 param;
param.tex_width = static_cast<UINT>(srcImage.width);
param.num_block_x = static_cast<UINT>(xblocks);
param.format = m_bcformat;
param.mode_id = modes[i];
param.start_block_id = start_block_id;
param.num_total_blocks = num_total_blocks;
param.alpha_weight = m_alphaWeight;
memcpy(mapped.pData, &param, sizeof(param));
pContext->Unmap(m_constBuffer.Get(), 0);
}
pSRVs[1] = (i & 1) ? m_err2SRV.Get() : m_err1SRV.Get();
RunComputeShader(pContext, m_BC7_tryMode137CS.Get(), pSRVs, 2, m_constBuffer.Get(),
(i & 1) ? m_err1UAV.Get() : m_err2UAV.Get(), uThreadGroupCount);
}
}
if (m_bc7_mode02)
{
// 3 subset modes tend to be used rarely and add significant compression time
for (UINT i = 0; i < 2; ++i)
{
static const UINT modes[] = { 0, 2 };
// Mode 0: err2 -> err1
// Mode 2: err1 -> err2
{
D3D11_MAPPED_SUBRESOURCE mapped;
HRESULT hr = pContext->Map(m_constBuffer.Get(), 0, D3D11_MAP_WRITE_DISCARD, 0, &mapped);
if (FAILED(hr))
{
ResetContext(pContext);
return hr;
}
ConstantsBC6HBC7 param;
param.tex_width = static_cast<UINT>(srcImage.width);
param.num_block_x = static_cast<UINT>(xblocks);
param.format = m_bcformat;
param.mode_id = modes[i];
param.start_block_id = start_block_id;
param.num_total_blocks = num_total_blocks;
param.alpha_weight = m_alphaWeight;
memcpy(mapped.pData, &param, sizeof(param));
pContext->Unmap(m_constBuffer.Get(), 0);
}
pSRVs[1] = (i & 1) ? m_err1SRV.Get() : m_err2SRV.Get();
RunComputeShader(pContext, m_BC7_tryMode02CS.Get(), pSRVs, 2, m_constBuffer.Get(),
(i & 1) ? m_err2UAV.Get() : m_err1UAV.Get(), uThreadGroupCount);
}
}
pSRVs[1] = (m_bc7_mode02 || m_bc7_mode137) ? m_err2SRV.Get() : m_err1SRV.Get();
RunComputeShader(pContext, m_BC7_encodeBlockCS.Get(), pSRVs, 2, m_constBuffer.Get(),
m_outputUAV.Get(), std::max<UINT>((uThreadGroupCount + 3) / 4, 1));
}
else
{
//--- BC6H ----------------------------------------------------------------
ID3D11ShaderResourceView* pSRVs[] = { sourceSRV.Get(), nullptr };
RunComputeShader(pContext, m_BC6H_tryModeG10CS.Get(), pSRVs, 2, m_constBuffer.Get(),
m_err1UAV.Get(), std::max<UINT>((uThreadGroupCount + 3) / 4, 1));
for (UINT i = 0; i < 10; ++i)
{
{
D3D11_MAPPED_SUBRESOURCE mapped;
HRESULT hr = pContext->Map(m_constBuffer.Get(), 0, D3D11_MAP_WRITE_DISCARD, 0, &mapped);
if (FAILED(hr))
{
ResetContext(pContext);
return hr;
}
ConstantsBC6HBC7 param;
param.tex_width = static_cast<UINT>(srcImage.width);
param.num_block_x = static_cast<UINT>(xblocks);
param.format = m_bcformat;
param.mode_id = i;
param.start_block_id = start_block_id;
param.num_total_blocks = num_total_blocks;
memcpy(mapped.pData, &param, sizeof(param));
pContext->Unmap(m_constBuffer.Get(), 0);
}
pSRVs[1] = (i & 1) ? m_err2SRV.Get() : m_err1SRV.Get();
RunComputeShader(pContext, m_BC6H_tryModeLE10CS.Get(), pSRVs, 2, m_constBuffer.Get(),
(i & 1) ? m_err1UAV.Get() : m_err2UAV.Get(), std::max<UINT>((uThreadGroupCount + 1) / 2, 1));
}
pSRVs[1] = m_err1SRV.Get();
RunComputeShader(pContext, m_BC6H_encodeBlockCS.Get(), pSRVs, 2, m_constBuffer.Get(),
m_outputUAV.Get(), std::max<UINT>((uThreadGroupCount + 1) / 2, 1));
}
start_block_id += n;
num_blocks -= n;
}
ResetContext(pContext);
//--- Copy output texture back to CPU ---------------------------------------------
pContext->CopyResource(m_outputCPU.Get(), m_output.Get());
D3D11_MAPPED_SUBRESOURCE mapped;
HRESULT hr = pContext->Map(m_outputCPU.Get(), 0, D3D11_MAP_READ, 0, &mapped);
if (SUCCEEDED(hr))
{
const uint8_t *pSrc = reinterpret_cast<const uint8_t *>(mapped.pData);
uint8_t *pDest = destImage.pixels;
size_t pitch = xblocks * sizeof(BufferBC6HBC7);
size_t rows = std::max<size_t>(1, (destImage.height + 3) >> 2);
for (size_t h = 0; h < rows; ++h)
{
memcpy(pDest, pSrc, destImage.rowPitch);
pSrc += pitch;
pDest += destImage.rowPitch;
}
pContext->Unmap(m_outputCPU.Get(), 0);
}
return hr;
}
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