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Updated DDSTextureLoader to optionall return Alpha Mode metadata if available

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This commit is contained in:
walbourn_cp 2013-03-22 17:24:05 -07:00
parent 3cc014ec76
commit ee978ad449
2 changed files with 67 additions and 16 deletions
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63
DDSTextureLoader/DDSTextureLoader.cpp
View File

@ -33,6 +33,8 @@
#pragma comment(lib,"dxguid.lib")
#endif
using namespace DirectX;
//--------------------------------------------------------------------------------------
// Macros
//--------------------------------------------------------------------------------------
@ -99,6 +101,11 @@ struct DDS_PIXELFORMAT
#define DDS_FLAGS_VOLUME 0x00200000 // DDSCAPS2_VOLUME
enum DDS_MISC_FLAGS2
{
DDS_MISC_FLAGS2_ALPHA_MODE_MASK = 0x3L,
};
typedef struct
{
uint32_t size;
@ -123,7 +130,7 @@ typedef struct
uint32_t resourceDimension;
uint32_t miscFlag; // see D3D11_RESOURCE_MISC_FLAG
uint32_t arraySize;
uint32_t reserved;
uint32_t miscFlags2;
} DDS_HEADER_DXT10;
#pragma pack(pop)
@ -237,7 +244,7 @@ static HRESULT LoadTextureDataFromFile( _In_z_ const wchar_t* fileName,
return E_FAIL;
}
DDS_HEADER* hdr = reinterpret_cast<DDS_HEADER*>( ddsData.get() + sizeof( uint32_t ) );
auto hdr = reinterpret_cast<DDS_HEADER*>( ddsData.get() + sizeof( uint32_t ) );
// Verify header to validate DDS file
if (hdr->size != sizeof(DDS_HEADER) ||
@ -1109,7 +1116,7 @@ static HRESULT CreateTextureFromDDS( _In_ ID3D11Device* d3dDevice,
if ((header->ddspf.flags & DDS_FOURCC) &&
(MAKEFOURCC( 'D', 'X', '1', '0' ) == header->ddspf.fourCC ))
{
const DDS_HEADER_DXT10* d3d10ext = reinterpret_cast<const DDS_HEADER_DXT10*>( (const char*)header + sizeof(DDS_HEADER) );
auto d3d10ext = reinterpret_cast<const DDS_HEADER_DXT10*>( (const char*)header + sizeof(DDS_HEADER) );
arraySize = d3d10ext->arraySize;
if (arraySize == 0)
@ -1310,6 +1317,28 @@ static HRESULT CreateTextureFromDDS( _In_ ID3D11Device* d3dDevice,
return hr;
}
//--------------------------------------------------------------------------------------
static DDS_ALPHA_MODE GetAlphaMode( _In_ const DDS_HEADER* header )
{
if ( header->ddspf.flags & DDS_FOURCC )
{
if ( MAKEFOURCC( 'D', 'X', '1', '0' ) == header->ddspf.fourCC )
{
auto d3d10ext = reinterpret_cast<const DDS_HEADER_DXT10*>( (const char*)header + sizeof(DDS_HEADER) );
return static_cast<DDS_ALPHA_MODE>(d3d10ext->miscFlags2 & DDS_MISC_FLAGS2_ALPHA_MODE_MASK);
}
else if ( ( MAKEFOURCC( 'D', 'X', 'T', '2' ) == header->ddspf.fourCC )
|| ( MAKEFOURCC( 'D', 'X', 'T', '4' ) == header->ddspf.fourCC ) )
{
return DDS_ALPHA_MODE_PREMULTIPLIED;
}
}
return DDS_ALPHA_MODE_STRAIGHT;
}
//--------------------------------------------------------------------------------------
_Use_decl_annotations_
HRESULT DirectX::CreateDDSTextureFromMemory( ID3D11Device* d3dDevice,
@ -1317,11 +1346,12 @@ HRESULT DirectX::CreateDDSTextureFromMemory( ID3D11Device* d3dDevice,
size_t ddsDataSize,
ID3D11Resource** texture,
ID3D11ShaderResourceView** textureView,
size_t maxsize )
size_t maxsize,
DDS_ALPHA_MODE* alphaMode )
{
return CreateDDSTextureFromMemoryEx( d3dDevice, ddsData, ddsDataSize, maxsize,
D3D11_USAGE_DEFAULT, D3D11_BIND_SHADER_RESOURCE, 0, 0, false,
texture, textureView );
texture, textureView, alphaMode );
}
_Use_decl_annotations_
@ -1335,7 +1365,8 @@ HRESULT DirectX::CreateDDSTextureFromMemoryEx( ID3D11Device* d3dDevice,
unsigned int miscFlags,
bool forceSRGB,
ID3D11Resource** texture,
ID3D11ShaderResourceView** textureView )
ID3D11ShaderResourceView** textureView,
DDS_ALPHA_MODE* alphaMode )
{
if ( texture )
{
@ -1363,7 +1394,7 @@ HRESULT DirectX::CreateDDSTextureFromMemoryEx( ID3D11Device* d3dDevice,
return E_FAIL;
}
const DDS_HEADER* header = reinterpret_cast<const DDS_HEADER*>( ddsData + sizeof( uint32_t ) );
auto header = reinterpret_cast<const DDS_HEADER*>( ddsData + sizeof( uint32_t ) );
// Verify header to validate DDS file
if (header->size != sizeof(DDS_HEADER) ||
@ -1405,6 +1436,9 @@ HRESULT DirectX::CreateDDSTextureFromMemoryEx( ID3D11Device* d3dDevice,
{
SetDebugObjectName(*textureView, "DDSTextureLoader");
}
if ( alphaMode )
*alphaMode = GetAlphaMode( header );
}
return hr;
@ -1416,11 +1450,12 @@ HRESULT DirectX::CreateDDSTextureFromFile( ID3D11Device* d3dDevice,
const wchar_t* fileName,
ID3D11Resource** texture,
ID3D11ShaderResourceView** textureView,
size_t maxsize )
size_t maxsize,
DDS_ALPHA_MODE* alphaMode )
{
return CreateDDSTextureFromFileEx( d3dDevice, fileName, maxsize,
D3D11_USAGE_DEFAULT, D3D11_BIND_SHADER_RESOURCE, 0, 0, false,
texture, textureView );
texture, textureView, alphaMode );
}
_Use_decl_annotations_
@ -1433,7 +1468,8 @@ HRESULT DirectX::CreateDDSTextureFromFileEx( ID3D11Device* d3dDevice,
unsigned int miscFlags,
bool forceSRGB,
ID3D11Resource** texture,
ID3D11ShaderResourceView** textureView )
ID3D11ShaderResourceView** textureView,
DDS_ALPHA_MODE* alphaMode )
{
if ( texture )
{
@ -1470,9 +1506,9 @@ HRESULT DirectX::CreateDDSTextureFromFileEx( ID3D11Device* d3dDevice,
usage, bindFlags, cpuAccessFlags, miscFlags, forceSRGB,
texture, textureView );
#if defined(_DEBUG) || defined(PROFILE)
if ( SUCCEEDED(hr) )
{
#if defined(_DEBUG) || defined(PROFILE)
if (texture != 0 || textureView != 0)
{
CHAR strFileA[MAX_PATH];
@ -1514,8 +1550,11 @@ HRESULT DirectX::CreateDDSTextureFromFileEx( ID3D11Device* d3dDevice,
}
}
}
}
#endif
if ( alphaMode )
*alphaMode = GetAlphaMode( header );
}
return hr;
}

20
DDSTextureLoader/DDSTextureLoader.h
View File

@ -41,19 +41,29 @@
namespace DirectX
{
enum DDS_ALPHA_MODE
{
DDS_ALPHA_MODE_STRAIGHT = 0,
DDS_ALPHA_MODE_PREMULTIPLIED = 1,
DDS_ALPHA_MODE_4TH_CHANNEL = 2,
DDS_ALPHA_MODE_OPAQUE = 3,
};
HRESULT CreateDDSTextureFromMemory( _In_ ID3D11Device* d3dDevice,
_In_reads_bytes_(ddsDataSize) const uint8_t* ddsData,
_In_ size_t ddsDataSize,
_Out_opt_ ID3D11Resource** texture,
_Out_opt_ ID3D11ShaderResourceView** textureView,
_In_ size_t maxsize = 0
_In_ size_t maxsize = 0,
_Out_opt_ DDS_ALPHA_MODE* alphaMode = nullptr
);
HRESULT CreateDDSTextureFromFile( _In_ ID3D11Device* d3dDevice,
_In_z_ const wchar_t* szFileName,
_Out_opt_ ID3D11Resource** texture,
_Out_opt_ ID3D11ShaderResourceView** textureView,
_In_ size_t maxsize = 0
_In_ size_t maxsize = 0,
_Out_opt_ DDS_ALPHA_MODE* alphaMode = nullptr
);
HRESULT CreateDDSTextureFromMemoryEx( _In_ ID3D11Device* d3dDevice,
@ -66,7 +76,8 @@ namespace DirectX
_In_ unsigned int miscFlags,
_In_ bool forceSRGB,
_Out_opt_ ID3D11Resource** texture,
_Out_opt_ ID3D11ShaderResourceView** textureView
_Out_opt_ ID3D11ShaderResourceView** textureView,
_Out_opt_ DDS_ALPHA_MODE* alphaMode = nullptr
);
HRESULT CreateDDSTextureFromFileEx( _In_ ID3D11Device* d3dDevice,
@ -78,6 +89,7 @@ namespace DirectX
_In_ unsigned int miscFlags,
_In_ bool forceSRGB,
_Out_opt_ ID3D11Resource** texture,
_Out_opt_ ID3D11ShaderResourceView** textureView
_Out_opt_ ID3D11ShaderResourceView** textureView,
_Out_opt_ DDS_ALPHA_MODE* alphaMode = nullptr
);
}