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crossxtex/DirectXTex/BCDirectCompute.cpp

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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 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 );
}
};
namespace DirectX
{
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;
}
//-------------------------------------------------------------------------------------
_Use_decl_annotations_
HRESULT GPUCompressBC::Prepare( size_t width, size_t height, DXGI_FORMAT format, float alphaWeight, bool skip3subsets )
{
if ( !width || !height || alphaWeight < 0.f )
return E_INVALIDARG;
#ifdef _M_X64
if ( (width > 0xFFFFFFFF) || (height > 0xFFFFFFFF) )
return E_INVALIDARG;
#endif
m_width = width;
m_height = height;
m_alphaWeight = alphaWeight;
m_skip3Subsets = skip3subsets;
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;
memset( &desc, 0, sizeof(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;
memset( &desc, 0, sizeof(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;
memset( &desc, 0, sizeof(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;
memset( &desc, 0, sizeof(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;
memset( &desc, 0, sizeof(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;
}
//-------------------------------------------------------------------------------------
_Use_decl_annotations_
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;
memset( &desc, 0, sizeof(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;
memset( &desc, 0, sizeof(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) );
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_skip3Subsets )
{
// 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_err2SRV.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;
}
}; // namespace
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