--- /dev/null
+//-------------------------------------------------------------------------------------
+// DirectXTexDDS.cpp
+//
+// DirectX Texture Library - Microsoft DirectDraw Surface (DDS) file format reader/writer
+//
+// 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.
+//
+// http://go.microsoft.com/fwlink/?LinkId=248926
+//-------------------------------------------------------------------------------------
+
+#include "directxtexp.h"
+
+#include "dds.h"
+
+namespace DirectX
+{
+
+//-------------------------------------------------------------------------------------
+// Legacy format mapping table (used for DDS files without 'DX10' extended header)
+//-------------------------------------------------------------------------------------
+enum CONVERSION_FLAGS
+{
+ CONV_FLAGS_NONE = 0x0,
+ CONV_FLAGS_EXPAND = 0x1, // Conversion requires expanded pixel size
+ CONV_FLAGS_NOALPHA = 0x2, // Conversion requires setting alpha to known value
+ CONV_FLAGS_SWIZZLE = 0x4, // BGR/RGB order swizzling required
+ CONV_FLAGS_PAL8 = 0x8, // Has an 8-bit palette
+ CONV_FLAGS_888 = 0x10, // Source is an 8:8:8 (24bpp) format
+ CONV_FLAGS_565 = 0x20, // Source is a 5:6:5 (16bpp) format
+ CONV_FLAGS_5551 = 0x40, // Source is a 5:5:5:1 (16bpp) format
+ CONV_FLAGS_4444 = 0x80, // Source is a 4:4:4:4 (16bpp) format
+ CONV_FLAGS_44 = 0x100, // Source is a 4:4 (8bpp) format
+ CONV_FLAGS_332 = 0x200, // Source is a 3:3:2 (8bpp) format
+ CONV_FLAGS_8332 = 0x400, // Source is a 8:3:3:2 (16bpp) format
+ CONV_FLAGS_A8P8 = 0x800, // Has an 8-bit palette with an alpha channel
+ CONV_FLAGS_DX10 = 0x10000, // Has the 'DX10' extension header
+};
+
+struct LegacyDDS
+{
+ DXGI_FORMAT format;
+ DWORD convFlags;
+ DDS_PIXELFORMAT ddpf;
+};
+
+const LegacyDDS g_LegacyDDSMap[] =
+{
+ { DXGI_FORMAT_BC1_UNORM, CONV_FLAGS_NONE, DDSPF_DXT1 }, // D3DFMT_DXT1
+ { DXGI_FORMAT_BC2_UNORM, CONV_FLAGS_NONE, DDSPF_DXT3 }, // D3DFMT_DXT3
+ { DXGI_FORMAT_BC3_UNORM, CONV_FLAGS_NONE, DDSPF_DXT5 }, // D3DFMT_DXT5
+
+ { DXGI_FORMAT_BC2_UNORM, CONV_FLAGS_NONE, DDSPF_DXT2 }, // D3DFMT_DXT2 (ignore premultiply)
+ { DXGI_FORMAT_BC3_UNORM, CONV_FLAGS_NONE, DDSPF_DXT4 }, // D3DFMT_DXT4 (ignore premultiply)
+
+ { DXGI_FORMAT_BC4_UNORM, CONV_FLAGS_NONE, DDSPF_BC4_UNORM },
+ { DXGI_FORMAT_BC4_SNORM, CONV_FLAGS_NONE, DDSPF_BC4_SNORM },
+ { DXGI_FORMAT_BC5_UNORM, CONV_FLAGS_NONE, DDSPF_BC5_UNORM },
+ { DXGI_FORMAT_BC5_SNORM, CONV_FLAGS_NONE, DDSPF_BC5_SNORM },
+
+ { DXGI_FORMAT_BC4_UNORM, CONV_FLAGS_NONE, { sizeof(DDS_PIXELFORMAT), DDS_FOURCC, MAKEFOURCC( 'A', 'T', 'I', '1' ), 0, 0, 0, 0, 0 } },
+ { DXGI_FORMAT_BC5_UNORM, CONV_FLAGS_NONE, { sizeof(DDS_PIXELFORMAT), DDS_FOURCC, MAKEFOURCC( 'A', 'T', 'I', '2' ), 0, 0, 0, 0, 0 } },
+
+ { DXGI_FORMAT_R8G8_B8G8_UNORM, CONV_FLAGS_NONE, DDSPF_R8G8_B8G8 }, // D3DFMT_R8G8_B8G8
+ { DXGI_FORMAT_G8R8_G8B8_UNORM, CONV_FLAGS_NONE, DDSPF_G8R8_G8B8 }, // D3DFMT_G8R8_G8B8
+
+ { DXGI_FORMAT_B8G8R8A8_UNORM, CONV_FLAGS_NONE, DDSPF_A8R8G8B8 }, // D3DFMT_A8R8G8B8 (uses DXGI 1.1 format)
+ { DXGI_FORMAT_B8G8R8X8_UNORM, CONV_FLAGS_NONE, DDSPF_X8R8G8B8 }, // D3DFMT_X8R8G8B8 (uses DXGI 1.1 format)
+ { DXGI_FORMAT_R8G8B8A8_UNORM, CONV_FLAGS_NONE, DDSPF_A8B8G8R8 }, // D3DFMT_A8B8G8R8
+ { DXGI_FORMAT_R8G8B8A8_UNORM, CONV_FLAGS_NOALPHA, DDSPF_X8B8G8R8 }, // D3DFMT_X8B8G8R8
+ { DXGI_FORMAT_R16G16_UNORM, CONV_FLAGS_NONE, DDSPF_G16R16 }, // D3DFMT_G16R16
+
+ { DXGI_FORMAT_R10G10B10A2_UNORM, CONV_FLAGS_SWIZZLE, { sizeof(DDS_PIXELFORMAT), DDS_RGB, 0, 32, 0x000003ff, 0x000ffc00, 0x3ff00000, 0xc0000000 } }, // D3DFMT_A2R10G10B10 (D3DX reversal issue workaround)
+ { DXGI_FORMAT_R10G10B10A2_UNORM, CONV_FLAGS_NONE, { sizeof(DDS_PIXELFORMAT), DDS_RGB, 0, 32, 0x3ff00000, 0x000ffc00, 0x000003ff, 0xc0000000 } }, // D3DFMT_A2B10G10R10 (D3DX reversal issue workaround)
+
+ { DXGI_FORMAT_R8G8B8A8_UNORM, CONV_FLAGS_EXPAND
+ | CONV_FLAGS_NOALPHA
+ | CONV_FLAGS_888, DDSPF_R8G8B8 }, // D3DFMT_R8G8B8
+
+ { DXGI_FORMAT_B5G6R5_UNORM, CONV_FLAGS_565, DDSPF_R5G6B5 }, // D3DFMT_R5G6B5
+ { DXGI_FORMAT_B5G5R5A1_UNORM, CONV_FLAGS_5551, DDSPF_A1R5G5B5 }, // D3DFMT_A1R5G5B5
+ { DXGI_FORMAT_B5G5R5A1_UNORM, CONV_FLAGS_5551
+ | CONV_FLAGS_NOALPHA, { sizeof(DDS_PIXELFORMAT), DDS_RGB, 0, 16, 0x7c00, 0x03e0, 0x001f, 0x0000 } }, // D3DFMT_X1R5G5B5
+
+ { DXGI_FORMAT_R8G8B8A8_UNORM, CONV_FLAGS_EXPAND
+ | CONV_FLAGS_8332, { sizeof(DDS_PIXELFORMAT), DDS_RGB, 0, 16, 0x00e0, 0x001c, 0x0003, 0xff00 } }, // D3DFMT_A8R3G3B2
+ { DXGI_FORMAT_B5G6R5_UNORM, CONV_FLAGS_EXPAND
+ | CONV_FLAGS_332, { sizeof(DDS_PIXELFORMAT), DDS_RGB, 0, 8, 0xe0, 0x1c, 0x03, 0x00 } }, // D3DFMT_R3G3B2
+
+ { DXGI_FORMAT_R8_UNORM, CONV_FLAGS_NONE, DDSPF_L8 }, // D3DFMT_L8
+ { DXGI_FORMAT_R16_UNORM, CONV_FLAGS_NONE, DDSPF_L16 }, // D3DFMT_L16
+ { DXGI_FORMAT_R8G8_UNORM, CONV_FLAGS_NONE, DDSPF_A8L8 }, // D3DFMT_A8L8
+
+ { DXGI_FORMAT_A8_UNORM, CONV_FLAGS_NONE, DDSPF_A8 }, // D3DFMT_A8
+
+ { DXGI_FORMAT_R16G16B16A16_UNORM, CONV_FLAGS_NONE, { sizeof(DDS_PIXELFORMAT), DDS_FOURCC, 36, 0, 0, 0, 0, 0 } }, // D3DFMT_A16B16G16R16
+ { DXGI_FORMAT_R16G16B16A16_SNORM, CONV_FLAGS_NONE, { sizeof(DDS_PIXELFORMAT), DDS_FOURCC, 110, 0, 0, 0, 0, 0 } }, // D3DFMT_Q16W16V16U16
+ { DXGI_FORMAT_R16_FLOAT, CONV_FLAGS_NONE, { sizeof(DDS_PIXELFORMAT), DDS_FOURCC, 111, 0, 0, 0, 0, 0 } }, // D3DFMT_R16F
+ { DXGI_FORMAT_R16G16_FLOAT, CONV_FLAGS_NONE, { sizeof(DDS_PIXELFORMAT), DDS_FOURCC, 112, 0, 0, 0, 0, 0 } }, // D3DFMT_G16R16F
+ { DXGI_FORMAT_R16G16B16A16_FLOAT, CONV_FLAGS_NONE, { sizeof(DDS_PIXELFORMAT), DDS_FOURCC, 113, 0, 0, 0, 0, 0 } }, // D3DFMT_A16B16G16R16F
+ { DXGI_FORMAT_R32_FLOAT, CONV_FLAGS_NONE, { sizeof(DDS_PIXELFORMAT), DDS_FOURCC, 114, 0, 0, 0, 0, 0 } }, // D3DFMT_R32F
+ { DXGI_FORMAT_R32G32_FLOAT, CONV_FLAGS_NONE, { sizeof(DDS_PIXELFORMAT), DDS_FOURCC, 115, 0, 0, 0, 0, 0 } }, // D3DFMT_G32R32F
+ { DXGI_FORMAT_R32G32B32A32_FLOAT, CONV_FLAGS_NONE, { sizeof(DDS_PIXELFORMAT), DDS_FOURCC, 116, 0, 0, 0, 0, 0 } }, // D3DFMT_A32B32G32R32F
+
+ { DXGI_FORMAT_R32_FLOAT, CONV_FLAGS_NONE, { sizeof(DDS_PIXELFORMAT), DDS_RGB, 0, 32, 0xffffffff, 0x00000000, 0x00000000, 0x00000000 } }, // D3DFMT_R32F (D3DX uses FourCC 114 instead)
+
+ { DXGI_FORMAT_R8G8B8A8_UNORM, CONV_FLAGS_EXPAND
+ | CONV_FLAGS_PAL8
+ | CONV_FLAGS_A8P8, { sizeof(DDS_PIXELFORMAT), DDS_PAL8, 0, 16, 0, 0, 0, 0 } }, // D3DFMT_A8P8
+ { DXGI_FORMAT_R8G8B8A8_UNORM, CONV_FLAGS_EXPAND
+ | CONV_FLAGS_PAL8, { sizeof(DDS_PIXELFORMAT), DDS_PAL8, 0, 8, 0, 0, 0, 0 } }, // D3DFMT_P8
+
+#ifdef DXGI_1_2_FORMATS
+ { DXGI_FORMAT_B4G4R4A4_UNORM, CONV_FLAGS_4444, DDSPF_A4R4G4B4 }, // D3DFMT_A4R4G4B4 (uses DXGI 1.2 format)
+ { DXGI_FORMAT_B4G4R4A4_UNORM, CONV_FLAGS_NOALPHA
+ | CONV_FLAGS_4444, { sizeof(DDS_PIXELFORMAT), DDS_RGB, 0, 16, 0x0f00, 0x00f0, 0x000f, 0x0000 } }, // D3DFMT_X4R4G4B4 (uses DXGI 1.2 format)
+ { DXGI_FORMAT_B4G4R4A4_UNORM, CONV_FLAGS_EXPAND
+ | CONV_FLAGS_44, { sizeof(DDS_PIXELFORMAT), DDS_LUMINANCE, 0, 8, 0x0f, 0x00, 0x00, 0xf0 } }, // D3DFMT_A4L4 (uses DXGI 1.2 format)
+#else // !DXGI_1_2_FORMATS
+ { DXGI_FORMAT_R8G8B8A8_UNORM, CONV_FLAGS_EXPAND
+ | CONV_FLAGS_4444, DDSPF_A4R4G4B4 }, // D3DFMT_A4R4G4B4
+ { DXGI_FORMAT_R8G8B8A8_UNORM, CONV_FLAGS_EXPAND
+ | CONV_FLAGS_NOALPHA
+ | CONV_FLAGS_4444, { sizeof(DDS_PIXELFORMAT), DDS_RGB, 0, 16, 0x0f00, 0x00f0, 0x000f, 0x0000 } }, // D3DFMT_X4R4G4B4
+ { DXGI_FORMAT_R8G8B8A8_UNORM, CONV_FLAGS_EXPAND
+ | CONV_FLAGS_44, { sizeof(DDS_PIXELFORMAT), DDS_LUMINANCE, 0, 8, 0x0f, 0x00, 0x00, 0xf0 } }, // D3DFMT_A4L4
+#endif
+};
+
+// Note that many common DDS reader/writers (including D3DX) swap the
+// the RED/BLUE masks for 10:10:10:2 formats. We assumme
+// below that the 'backwards' header mask is being used since it is most
+// likely written by D3DX. The more robust solution is to use the 'DX10'
+// header extension and specify the DXGI_FORMAT_R10G10B10A2_UNORM format directly
+
+// We do not support the following legacy Direct3D 9 formats:
+// BumpDuDv D3DFMT_V8U8, D3DFMT_Q8W8V8U8, D3DFMT_V16U16, D3DFMT_A2W10V10U10
+// BumpLuminance D3DFMT_L6V5U5, D3DFMT_X8L8V8U8
+// FourCC "UYVY" D3DFMT_UYVY
+// FourCC "YUY2" D3DFMT_YUY2
+// FourCC 117 D3DFMT_CxV8U8
+// ZBuffer D3DFMT_D16_LOCKABLE
+// FourCC 82 D3DFMT_D32F_LOCKABLE
+
+static DXGI_FORMAT _GetDXGIFormat( const DDS_PIXELFORMAT& ddpf, DWORD flags, _Inout_opt_ DWORD* convFlags )
+{
+ const size_t MAP_SIZE = sizeof(g_LegacyDDSMap) / sizeof(LegacyDDS);
+ size_t index = 0;
+ for( index = 0; index < MAP_SIZE; ++index )
+ {
+ const LegacyDDS* entry = &g_LegacyDDSMap[index];
+
+ if ( ddpf.dwFlags & entry->ddpf.dwFlags )
+ {
+ if ( entry->ddpf.dwFlags & DDS_FOURCC )
+ {
+ if ( ddpf.dwFourCC == entry->ddpf.dwFourCC )
+ break;
+ }
+ else if ( entry->ddpf.dwFlags & DDS_PAL8 )
+ {
+ if ( ddpf.dwRGBBitCount == entry->ddpf.dwRGBBitCount )
+ break;
+ }
+ else if ( ddpf.dwRGBBitCount == entry->ddpf.dwRGBBitCount )
+ {
+ // RGB, RGBA, ALPHA, LUMINANCE
+ if ( ddpf.dwRBitMask == entry->ddpf.dwRBitMask
+ && ddpf.dwGBitMask == entry->ddpf.dwGBitMask
+ && ddpf.dwBBitMask == entry->ddpf.dwBBitMask
+ && ddpf.dwABitMask == entry->ddpf.dwABitMask )
+ break;
+ }
+ }
+ }
+
+ if ( index >= MAP_SIZE )
+ return DXGI_FORMAT_UNKNOWN;
+
+ DWORD cflags = g_LegacyDDSMap[index].convFlags;
+ DXGI_FORMAT format = g_LegacyDDSMap[index].format;
+
+ if ( (cflags & CONV_FLAGS_EXPAND) && (flags & DDS_FLAGS_NO_LEGACY_EXPANSION) )
+ return DXGI_FORMAT_UNKNOWN;
+
+ if ( (format == DXGI_FORMAT_R10G10B10A2_UNORM) && (flags & DDS_FLAGS_NO_R10B10G10A2_FIXUP) )
+ {
+ cflags ^= CONV_FLAGS_SWIZZLE;
+ }
+
+ if ( convFlags )
+ *convFlags = cflags;
+
+ return format;
+}
+
+
+//-------------------------------------------------------------------------------------
+// Decodes DDS header including optional DX10 extended header
+//-------------------------------------------------------------------------------------
+static HRESULT _DecodeDDSHeader( _In_bytecount_(size) LPCVOID pSource, size_t size, DWORD flags, _Out_ TexMetadata& metadata,
+ _Inout_opt_ DWORD* convFlags )
+{
+ if ( !pSource )
+ return E_INVALIDARG;
+
+ memset( &metadata, 0, sizeof(TexMetadata) );
+
+ if ( size < (sizeof(DDS_HEADER) + sizeof(uint32_t)) )
+ {
+ return HRESULT_FROM_WIN32( ERROR_INVALID_DATA );
+ }
+
+ // DDS files always start with the same magic number ("DDS ")
+ uint32_t dwMagicNumber = *reinterpret_cast<const uint32_t*>(pSource);
+ if ( dwMagicNumber != DDS_MAGIC )
+ {
+ return E_FAIL;
+ }
+
+ const DDS_HEADER* pHeader = reinterpret_cast<const DDS_HEADER*>( (const uint8_t*)pSource + sizeof( uint32_t ) );
+ assert( pHeader );
+
+ // Verify header to validate DDS file
+ if ( pHeader->dwSize != sizeof(DDS_HEADER)
+ || pHeader->ddspf.dwSize != sizeof(DDS_PIXELFORMAT) )
+ {
+ return E_FAIL;
+ }
+
+ metadata.mipLevels = pHeader->dwMipMapCount;
+ if ( metadata.mipLevels == 0 )
+ metadata.mipLevels = 1;
+
+ // Check for DX10 extension
+ if ( (pHeader->ddspf.dwFlags & DDS_FOURCC)
+ && (MAKEFOURCC( 'D', 'X', '1', '0' ) == pHeader->ddspf.dwFourCC) )
+ {
+ // Buffer must be big enough for both headers and magic value
+ if ( size < (sizeof(DDS_HEADER)+sizeof(uint32_t)+sizeof(DDS_HEADER_DXT10)) )
+ {
+ return E_FAIL;
+ }
+
+ const DDS_HEADER_DXT10* d3d10ext = reinterpret_cast<const DDS_HEADER_DXT10*>( (const uint8_t*)pSource + sizeof( uint32_t ) + sizeof(DDS_HEADER) );
+ if ( convFlags )
+ *convFlags |= CONV_FLAGS_DX10;
+
+ metadata.arraySize = d3d10ext->arraySize;
+ if ( metadata.arraySize == 0 )
+ {
+ return HRESULT_FROM_WIN32( ERROR_INVALID_DATA );
+ }
+
+ metadata.format = d3d10ext->dxgiFormat;
+ if ( !IsValid( metadata.format ) )
+ {
+ HRESULT_FROM_WIN32( ERROR_INVALID_DATA );
+ }
+
+ switch ( d3d10ext->resourceDimension )
+ {
+ case DDS_DIMENSION_TEXTURE1D:
+
+ // D3DX writes 1D textures with a fixed Height of 1
+ if ( (pHeader->dwFlags & DDS_HEIGHT) && pHeader->dwHeight != 1 )
+ {
+ return HRESULT_FROM_WIN32( ERROR_INVALID_DATA );
+ }
+
+ metadata.width = pHeader->dwWidth;
+ metadata.height = 1;
+ metadata.depth = 1;
+ metadata.dimension = TEX_DIMENSION_TEXTURE1D;
+ break;
+
+ case DDS_DIMENSION_TEXTURE2D:
+ if ( d3d10ext->miscFlag & DDS_RESOURCE_MISC_TEXTURECUBE )
+ {
+ metadata.miscFlags |= TEX_MISC_TEXTURECUBE;
+ metadata.arraySize *= 6;
+ }
+
+ metadata.width = pHeader->dwWidth;
+ metadata.height = pHeader->dwHeight;
+ metadata.depth = 1;
+ metadata.dimension = TEX_DIMENSION_TEXTURE2D;
+ break;
+
+ case DDS_DIMENSION_TEXTURE3D:
+ if ( !(pHeader->dwFlags & DDS_HEADER_FLAGS_VOLUME) )
+ {
+ return HRESULT_FROM_WIN32( ERROR_INVALID_DATA );
+ }
+
+ if ( metadata.arraySize > 1 )
+ return HRESULT_FROM_WIN32( ERROR_NOT_SUPPORTED );
+
+ metadata.width = pHeader->dwWidth;
+ metadata.height = pHeader->dwHeight;
+ metadata.depth = pHeader->dwDepth;
+ metadata.dimension = TEX_DIMENSION_TEXTURE3D;
+ break;
+
+ default:
+ return HRESULT_FROM_WIN32( ERROR_INVALID_DATA );
+ }
+ }
+ else
+ {
+ metadata.arraySize = 1;
+
+ if ( pHeader->dwFlags & DDS_HEADER_FLAGS_VOLUME )
+ {
+ metadata.width = pHeader->dwWidth;
+ metadata.height = pHeader->dwHeight;
+ metadata.depth = pHeader->dwDepth;
+ metadata.dimension = TEX_DIMENSION_TEXTURE3D;
+ }
+ else
+ {
+ if ( pHeader->dwCaps2 & DDS_CUBEMAP )
+ {
+ // We require all six faces to be defined
+ if ( (pHeader->dwCaps2 & DDS_CUBEMAP_ALLFACES ) != DDS_CUBEMAP_ALLFACES )
+ return HRESULT_FROM_WIN32( ERROR_NOT_SUPPORTED );
+
+ metadata.arraySize = 6;
+ metadata.miscFlags |= TEX_MISC_TEXTURECUBE;
+ }
+
+ metadata.width = pHeader->dwWidth;
+ metadata.height = pHeader->dwHeight;
+ metadata.depth = 1;
+ metadata.dimension = TEX_DIMENSION_TEXTURE2D;
+
+ // Note there's no way for a legacy Direct3D 9 DDS to express a '1D' texture
+ }
+
+ metadata.format = _GetDXGIFormat( pHeader->ddspf, flags, convFlags );
+
+ if ( metadata.format == DXGI_FORMAT_UNKNOWN )
+ return HRESULT_FROM_WIN32( ERROR_NOT_SUPPORTED );
+ }
+
+ // Special flag for handling BGR DXGI 1.1 formats
+ if (flags & DDS_FLAGS_FORCE_RGB)
+ {
+ switch ( metadata.format )
+ {
+ case DXGI_FORMAT_B8G8R8A8_UNORM:
+ metadata.format = DXGI_FORMAT_R8G8B8A8_UNORM;
+ if ( convFlags )
+ *convFlags |= CONV_FLAGS_SWIZZLE;
+ break;
+
+ case DXGI_FORMAT_B8G8R8X8_UNORM:
+ metadata.format = DXGI_FORMAT_R8G8B8A8_UNORM;
+ if ( convFlags )
+ *convFlags |= CONV_FLAGS_SWIZZLE | CONV_FLAGS_NOALPHA;
+ break;
+
+ case DXGI_FORMAT_B8G8R8A8_TYPELESS:
+ metadata.format = DXGI_FORMAT_R8G8B8A8_TYPELESS;
+ if ( convFlags )
+ *convFlags |= CONV_FLAGS_SWIZZLE;
+ break;
+
+ case DXGI_FORMAT_B8G8R8A8_UNORM_SRGB:
+ metadata.format = DXGI_FORMAT_R8G8B8A8_UNORM_SRGB;
+ if ( convFlags )
+ *convFlags |= CONV_FLAGS_SWIZZLE;
+ break;
+
+ case DXGI_FORMAT_B8G8R8X8_TYPELESS:
+ metadata.format = DXGI_FORMAT_R8G8B8A8_TYPELESS;
+ if ( convFlags )
+ *convFlags |= CONV_FLAGS_SWIZZLE | CONV_FLAGS_NOALPHA;
+ break;
+
+ case DXGI_FORMAT_B8G8R8X8_UNORM_SRGB:
+ metadata.format = DXGI_FORMAT_R8G8B8A8_UNORM_SRGB;
+ if ( convFlags )
+ *convFlags |= CONV_FLAGS_SWIZZLE | CONV_FLAGS_NOALPHA;
+ break;
+ }
+ }
+
+ // Special flag for handling 16bpp formats
+ if (flags & DDS_FLAGS_NO_16BPP)
+ {
+ switch ( metadata.format )
+ {
+ case DXGI_FORMAT_B5G6R5_UNORM:
+ case DXGI_FORMAT_B5G5R5A1_UNORM:
+#ifdef DXGI_1_2_FORMATS
+ case DXGI_FORMAT_B4G4R4A4_UNORM:
+#endif
+ metadata.format = DXGI_FORMAT_R8G8B8A8_UNORM;
+ if ( convFlags )
+ {
+ *convFlags |= CONV_FLAGS_EXPAND;
+ if ( metadata.format == DXGI_FORMAT_B5G6R5_UNORM )
+ *convFlags |= CONV_FLAGS_NOALPHA;
+ }
+ }
+ }
+
+ return S_OK;
+}
+
+
+//-------------------------------------------------------------------------------------
+// Encodes DDS file header (magic value, header, optional DX10 extended header)
+//-------------------------------------------------------------------------------------
+HRESULT _EncodeDDSHeader( _In_ const TexMetadata& metadata, DWORD flags,
+ _Out_opt_cap_x_(maxsize) LPVOID pDestination, _In_ size_t maxsize, _Out_ size_t& required )
+{
+ assert( IsValid( metadata.format ) && !IsVideo( metadata.format ) );
+
+ if ( metadata.arraySize > 1 )
+ {
+ if ( (metadata.arraySize != 6) || (metadata.dimension != TEX_DIMENSION_TEXTURE2D) || !(metadata.miscFlags & TEX_MISC_TEXTURECUBE) )
+ {
+ flags |= DDS_FLAGS_FORCE_DX10_EXT;
+ }
+ }
+
+ DDS_PIXELFORMAT ddpf = { 0 };
+ if ( !(flags & DDS_FLAGS_FORCE_DX10_EXT) )
+ {
+ switch( metadata.format )
+ {
+ case DXGI_FORMAT_R8G8B8A8_UNORM: memcpy_s( &ddpf, sizeof(ddpf), &DDSPF_A8B8G8R8, sizeof(DDS_PIXELFORMAT) ); break;
+ case DXGI_FORMAT_R16G16_UNORM: memcpy_s( &ddpf, sizeof(ddpf), &DDSPF_G16R16, sizeof(DDS_PIXELFORMAT) ); break;
+ case DXGI_FORMAT_R8G8_UNORM: memcpy_s( &ddpf, sizeof(ddpf), &DDSPF_A8L8, sizeof(DDS_PIXELFORMAT) ); break;
+ case DXGI_FORMAT_R16_UNORM: memcpy_s( &ddpf, sizeof(ddpf), &DDSPF_L16, sizeof(DDS_PIXELFORMAT) ); break;
+ case DXGI_FORMAT_R8_UNORM: memcpy_s( &ddpf, sizeof(ddpf), &DDSPF_L8, sizeof(DDS_PIXELFORMAT) ); break;
+ case DXGI_FORMAT_A8_UNORM: memcpy_s( &ddpf, sizeof(ddpf), &DDSPF_A8, sizeof(DDS_PIXELFORMAT) ); break;
+ case DXGI_FORMAT_R8G8_B8G8_UNORM: memcpy_s( &ddpf, sizeof(ddpf), &DDSPF_R8G8_B8G8, sizeof(DDS_PIXELFORMAT) ); break;
+ case DXGI_FORMAT_G8R8_G8B8_UNORM: memcpy_s( &ddpf, sizeof(ddpf), &DDSPF_G8R8_G8B8, sizeof(DDS_PIXELFORMAT) ); break;
+ case DXGI_FORMAT_BC1_UNORM: memcpy_s( &ddpf, sizeof(ddpf), &DDSPF_DXT1, sizeof(DDS_PIXELFORMAT) ); break;
+ case DXGI_FORMAT_BC2_UNORM: memcpy_s( &ddpf, sizeof(ddpf), &DDSPF_DXT3, sizeof(DDS_PIXELFORMAT) ); break;
+ case DXGI_FORMAT_BC3_UNORM: memcpy_s( &ddpf, sizeof(ddpf), &DDSPF_DXT5, sizeof(DDS_PIXELFORMAT) ); break;
+ case DXGI_FORMAT_BC4_UNORM: memcpy_s( &ddpf, sizeof(ddpf), &DDSPF_BC4_UNORM, sizeof(DDS_PIXELFORMAT) ); break;
+ case DXGI_FORMAT_BC4_SNORM: memcpy_s( &ddpf, sizeof(ddpf), &DDSPF_BC4_SNORM, sizeof(DDS_PIXELFORMAT) ); break;
+ case DXGI_FORMAT_BC5_UNORM: memcpy_s( &ddpf, sizeof(ddpf), &DDSPF_BC5_UNORM, sizeof(DDS_PIXELFORMAT) ); break;
+ case DXGI_FORMAT_BC5_SNORM: memcpy_s( &ddpf, sizeof(ddpf), &DDSPF_BC5_SNORM, sizeof(DDS_PIXELFORMAT) ); break;
+ case DXGI_FORMAT_B5G6R5_UNORM: memcpy_s( &ddpf, sizeof(ddpf), &DDSPF_R5G6B5, sizeof(DDS_PIXELFORMAT) ); break;
+ case DXGI_FORMAT_B5G5R5A1_UNORM: memcpy_s( &ddpf, sizeof(ddpf), &DDSPF_A1R5G5B5, sizeof(DDS_PIXELFORMAT) ); break;
+ case DXGI_FORMAT_B8G8R8A8_UNORM: memcpy_s( &ddpf, sizeof(ddpf), &DDSPF_A8R8G8B8, sizeof(DDS_PIXELFORMAT) ); break; // DXGI 1.1
+ case DXGI_FORMAT_B8G8R8X8_UNORM: memcpy_s( &ddpf, sizeof(ddpf), &DDSPF_X8R8G8B8, sizeof(DDS_PIXELFORMAT) ); break; // DXGI 1.1
+
+#ifdef DXGI_1_2_FORMATS
+ case DXGI_FORMAT_B4G4R4A4_UNORM: memcpy_s( &ddpf, sizeof(ddpf), &DDSPF_A4R4G4B4, sizeof(DDS_PIXELFORMAT) ); break;
+#endif
+
+ // Legacy D3DX formats using D3DFMT enum value as FourCC
+ case DXGI_FORMAT_R32G32B32A32_FLOAT:
+ ddpf.dwSize = sizeof(DDS_PIXELFORMAT); ddpf.dwFlags = DDS_FOURCC; ddpf.dwFourCC = 116; // D3DFMT_A32B32G32R32F
+ break;
+ case DXGI_FORMAT_R16G16B16A16_FLOAT:
+ ddpf.dwSize = sizeof(DDS_PIXELFORMAT); ddpf.dwFlags = DDS_FOURCC; ddpf.dwFourCC = 113; // D3DFMT_A16B16G16R16F
+ break;
+ case DXGI_FORMAT_R16G16B16A16_UNORM:
+ ddpf.dwSize = sizeof(DDS_PIXELFORMAT); ddpf.dwFlags = DDS_FOURCC; ddpf.dwFourCC = 36; // D3DFMT_A16B16G16R16
+ break;
+ case DXGI_FORMAT_R16G16B16A16_SNORM:
+ ddpf.dwSize = sizeof(DDS_PIXELFORMAT); ddpf.dwFlags = DDS_FOURCC; ddpf.dwFourCC = 110; // D3DFMT_Q16W16V16U16
+ break;
+ case DXGI_FORMAT_R32G32_FLOAT:
+ ddpf.dwSize = sizeof(DDS_PIXELFORMAT); ddpf.dwFlags = DDS_FOURCC; ddpf.dwFourCC = 115; // D3DFMT_G32R32F
+ break;
+ case DXGI_FORMAT_R16G16_FLOAT:
+ ddpf.dwSize = sizeof(DDS_PIXELFORMAT); ddpf.dwFlags = DDS_FOURCC; ddpf.dwFourCC = 112; // D3DFMT_G16R16F
+ break;
+ case DXGI_FORMAT_R32_FLOAT:
+ ddpf.dwSize = sizeof(DDS_PIXELFORMAT); ddpf.dwFlags = DDS_FOURCC; ddpf.dwFourCC = 114; // D3DFMT_R32F
+ break;
+ case DXGI_FORMAT_R16_FLOAT:
+ ddpf.dwSize = sizeof(DDS_PIXELFORMAT); ddpf.dwFlags = DDS_FOURCC; ddpf.dwFourCC = 111; // D3DFMT_R16F
+ break;
+ }
+ }
+
+ required = sizeof(uint32_t) + sizeof(DDS_HEADER);
+
+ if ( ddpf.dwSize == 0 )
+ required += sizeof(DDS_HEADER_DXT10);
+
+ if ( !pDestination )
+ return S_OK;
+
+ if ( maxsize < required )
+ return E_NOT_SUFFICIENT_BUFFER;
+
+ *reinterpret_cast<uint32_t*>(pDestination) = DDS_MAGIC;
+
+ DDS_HEADER* header = reinterpret_cast<DDS_HEADER*>( reinterpret_cast<uint8_t*>(pDestination) + sizeof(uint32_t) );
+ assert( header );
+
+ memset( header, 0, sizeof(DDS_HEADER ) );
+ header->dwSize = sizeof( DDS_HEADER );
+ header->dwFlags = DDS_HEADER_FLAGS_TEXTURE;
+ header->dwCaps = DDS_SURFACE_FLAGS_TEXTURE;
+
+ if (metadata.mipLevels > 0)
+ {
+ header->dwFlags |= DDS_HEADER_FLAGS_MIPMAP;
+
+#ifdef _AMD64_
+ if ( metadata.mipLevels > 0xFFFFFFFF )
+ return E_INVALIDARG;
+#endif
+
+ header->dwMipMapCount = static_cast<uint32_t>( metadata.mipLevels );
+
+ if ( header->dwMipMapCount > 1 )
+ header->dwCaps |= DDS_SURFACE_FLAGS_MIPMAP;
+ }
+
+ switch( metadata.dimension )
+ {
+ case TEX_DIMENSION_TEXTURE1D:
+#ifdef _AMD64_
+ if ( metadata.height > 0xFFFFFFFF )
+ return E_INVALIDARG;
+#endif
+
+ header->dwWidth = static_cast<uint32_t>( metadata.width );
+ header->dwHeight = header->dwDepth = 1;
+ break;
+
+ case TEX_DIMENSION_TEXTURE2D:
+#ifdef _AMD64_
+ if ( metadata.height > 0xFFFFFFFF
+ || metadata.width > 0xFFFFFFFF)
+ return E_INVALIDARG;
+#endif
+
+ header->dwHeight = static_cast<uint32_t>( metadata.height );
+ header->dwWidth = static_cast<uint32_t>( metadata.width );
+ header->dwDepth = 1;
+
+ if ( metadata.miscFlags & TEX_MISC_TEXTURECUBE )
+ {
+ header->dwCaps |= DDS_SURFACE_FLAGS_CUBEMAP;
+ header->dwCaps2 |= DDS_CUBEMAP_ALLFACES;
+ }
+ break;
+
+ case TEX_DIMENSION_TEXTURE3D:
+#ifdef _AMD64_
+ if ( metadata.height > 0xFFFFFFFF
+ || metadata.width > 0xFFFFFFFF
+ || metadata.depth > 0xFFFFFFFF )
+ return E_INVALIDARG;
+#endif
+
+ header->dwFlags |= DDS_HEADER_FLAGS_VOLUME;
+ header->dwCaps2 |= DDS_FLAGS_VOLUME;
+ header->dwHeight = static_cast<uint32_t>( metadata.height );
+ header->dwWidth = static_cast<uint32_t>( metadata.width );
+ header->dwDepth = static_cast<uint32_t>( metadata.depth );
+ break;
+
+ default:
+ return E_FAIL;
+ }
+
+ size_t rowPitch, slicePitch;
+ ComputePitch( metadata.format, metadata.width, metadata.height, rowPitch, slicePitch, CP_FLAGS_NONE );
+
+#ifdef _AMD64_
+ if ( slicePitch > 0xFFFFFFFF
+ || rowPitch > 0xFFFFFFFF )
+ return E_FAIL;
+#endif
+
+ if ( IsCompressed( metadata.format ) )
+ {
+ header->dwFlags |= DDS_HEADER_FLAGS_LINEARSIZE;
+ header->dwPitchOrLinearSize = static_cast<uint32_t>( slicePitch );
+ }
+ else
+ {
+ header->dwFlags |= DDS_HEADER_FLAGS_PITCH;
+ header->dwPitchOrLinearSize = static_cast<uint32_t>( rowPitch );
+ }
+
+ if ( ddpf.dwSize == 0 )
+ {
+ memcpy_s( &header->ddspf, sizeof(header->ddspf), &DDSPF_DX10, sizeof(DDS_PIXELFORMAT) );
+
+ DDS_HEADER_DXT10* ext = reinterpret_cast<DDS_HEADER_DXT10*>( reinterpret_cast<uint8_t*>(header) + sizeof(DDS_HEADER) );
+ assert( ext );
+
+ memset( ext, 0, sizeof(DDS_HEADER_DXT10) );
+ ext->dxgiFormat = metadata.format;
+ ext->resourceDimension = metadata.dimension;
+
+#ifdef _AMD64_
+ if ( metadata.arraySize > 0xFFFFFFFF )
+ return E_INVALIDARG;
+#endif
+
+ if ( metadata.miscFlags & TEX_MISC_TEXTURECUBE )
+ {
+ ext->miscFlag |= TEX_MISC_TEXTURECUBE;
+ assert( (metadata.arraySize % 6) == 0 );
+ ext->arraySize = static_cast<UINT>( metadata.arraySize / 6 );
+ }
+ else
+ {
+ ext->arraySize = static_cast<UINT>( metadata.arraySize );
+ }
+ }
+ else
+ {
+ memcpy_s( &header->ddspf, sizeof(header->ddspf), &ddpf, sizeof(ddpf) );
+ }
+
+ return S_OK;
+}
+
+
+//-------------------------------------------------------------------------------------
+// Converts an image row with optional clearing of alpha value to 1.0
+// Returns true if supported, false if expansion case not supported
+//-------------------------------------------------------------------------------------
+enum TEXP_LEGACY_FORMAT
+{
+ TEXP_LEGACY_UNKNOWN = 0,
+ TEXP_LEGACY_R8G8B8,
+ TEXP_LEGACY_R3G3B2,
+ TEXP_LEGACY_A8R3G3B2,
+ TEXP_LEGACY_P8,
+ TEXP_LEGACY_A8P8,
+ TEXP_LEGACY_A4L4,
+ TEXP_LEGACY_B4G4R4A4,
+};
+
+inline static TEXP_LEGACY_FORMAT _FindLegacyFormat( DWORD flags )
+{
+ TEXP_LEGACY_FORMAT lformat = TEXP_LEGACY_UNKNOWN;
+
+ if ( flags & CONV_FLAGS_PAL8 )
+ {
+ lformat = ( flags & CONV_FLAGS_A8P8 ) ? TEXP_LEGACY_A8P8 : TEXP_LEGACY_P8;
+ }
+ else if ( flags & CONV_FLAGS_888 )
+ lformat = TEXP_LEGACY_R8G8B8;
+ else if ( flags & CONV_FLAGS_332 )
+ lformat = TEXP_LEGACY_R3G3B2;
+ else if ( flags & CONV_FLAGS_8332 )
+ lformat = TEXP_LEGACY_A8R3G3B2;
+ else if ( flags & CONV_FLAGS_44 )
+ lformat = TEXP_LEGACY_A4L4;
+#ifndef DXGI_1_2_FORMATS
+ else if ( flags & CONV_FLAGS_4444 )
+ lformat = TEXP_LEGACY_B4G4R4A4;
+#endif
+
+ return lformat;
+}
+
+static bool _LegacyExpandScanline( _Out_bytecap_(outSize) LPVOID pDestination, size_t outSize, _In_ DXGI_FORMAT outFormat,
+ _In_bytecount_(inSize) LPCVOID pSource, size_t inSize, _In_ TEXP_LEGACY_FORMAT inFormat,
+ _In_opt_count_c_(256) const uint32_t* pal8, _In_ DWORD flags )
+{
+ assert( pDestination && outSize > 0 );
+ assert( pSource && inSize > 0 );
+ assert( IsValid(outFormat) && !IsVideo(outFormat) );
+
+ switch( inFormat )
+ {
+ case TEXP_LEGACY_R8G8B8:
+ if ( outFormat != DXGI_FORMAT_R8G8B8A8_UNORM )
+ return false;
+
+ // D3DFMT_R8G8B8 -> DXGI_FORMAT_R8G8B8A8_UNORM
+ {
+ const uint8_t * __restrict sPtr = reinterpret_cast<const uint8_t*>(pSource);
+ uint32_t * __restrict dPtr = reinterpret_cast<uint32_t*>(pDestination);
+
+ for( size_t ocount = 0, icount = 0; ((icount < inSize) && (ocount < outSize)); icount += 3, ocount += 4 )
+ {
+ // 24bpp Direct3D 9 files are actually BGR, so need to swizzle as well
+ uint32_t t1 = ( *(sPtr) << 16 );
+ uint32_t t2 = ( *(sPtr+1) << 8 );
+ uint32_t t3 = *(sPtr+2);
+
+ *(dPtr++) = t1 | t2 | t3 | 0xff000000;
+ sPtr += 3;
+ }
+ }
+ return true;
+
+ case TEXP_LEGACY_R3G3B2:
+ switch( outFormat )
+ {
+ case DXGI_FORMAT_R8G8B8A8_UNORM:
+ // D3DFMT_R3G3B2 -> DXGI_FORMAT_R8G8B8A8_UNORM
+ {
+ const uint8_t* __restrict sPtr = reinterpret_cast<const uint8_t*>(pSource);
+ uint32_t * __restrict dPtr = reinterpret_cast<uint32_t*>(pDestination);
+
+ for( size_t ocount = 0, icount = 0; ((icount < inSize) && (ocount < outSize)); ++icount, ocount += 4 )
+ {
+ uint8_t t = *(sPtr++);
+
+ uint32_t t1 = (t & 0xe0) | ((t & 0xe0) >> 3) | ((t & 0xc0) >> 6);
+ uint32_t t2 = ((t & 0x1c) << 11) | ((t & 0x1c) << 8) | ((t & 0x18) << 5);
+ uint32_t t3 = ((t & 0x03) << 22) | ((t & 0x03) << 20) | ((t & 0x03) << 18) | ((t & 0x03) << 16);
+
+ *(dPtr++) = t1 | t2 | t3 | 0xff000000;
+ }
+ }
+ return true;
+
+ case DXGI_FORMAT_B5G6R5_UNORM:
+ // D3DFMT_R3G3B2 -> DXGI_FORMAT_B5G6R5_UNORM
+ {
+ const uint8_t* __restrict sPtr = reinterpret_cast<const uint8_t*>(pSource);
+ uint16_t * __restrict dPtr = reinterpret_cast<uint16_t*>(pDestination);
+
+ for( size_t ocount = 0, icount = 0; ((icount < inSize) && (ocount < outSize)); ++icount, ocount += 2 )
+ {
+ uint8_t t = *(sPtr++);
+
+ uint16_t t1 = ((t & 0xe0) << 8) | ((t & 0xc0) << 5);
+ uint16_t t2 = ((t & 0x1c) << 6) | ((t & 0x1c) << 3);
+ uint16_t t3 = ((t & 0x03) << 3) | ((t & 0x03) << 1) | ((t & 0x02) >> 1);
+
+ *(dPtr++) = t1 | t2 | t3;
+ }
+ }
+ return true;
+ }
+ break;
+
+ case TEXP_LEGACY_A8R3G3B2:
+ if ( outFormat != DXGI_FORMAT_R8G8B8A8_UNORM )
+ return false;
+
+ // D3DFMT_A8R3G3B2 -> DXGI_FORMAT_R8G8B8A8_UNORM
+ {
+ const uint16_t* __restrict sPtr = reinterpret_cast<const uint16_t*>(pSource);
+ uint32_t * __restrict dPtr = reinterpret_cast<uint32_t*>(pDestination);
+
+ for( size_t ocount = 0, icount = 0; ((icount < inSize) && (ocount < outSize)); icount += 2, ocount += 4 )
+ {
+ uint16_t t = *(sPtr++);
+
+ uint32_t t1 = (t & 0x00e0) | ((t & 0x00e0) >> 3) | ((t & 0x00c0) >> 6);
+ uint32_t t2 = ((t & 0x001c) << 11) | ((t & 0x001c) << 8) | ((t & 0x0018) << 5);
+ uint32_t t3 = ((t & 0x0003) << 22) | ((t & 0x0003) << 20) | ((t & 0x0003) << 18) | ((t & 0x0003) << 16);
+ uint32_t ta = ( flags & TEXP_SCANLINE_SETALPHA ) ? 0xff000000 : ((t & 0xff00) << 16);
+
+ *(dPtr++) = t1 | t2 | t3 | ta;
+ }
+ }
+ return true;
+
+ case TEXP_LEGACY_P8:
+ if ( (outFormat != DXGI_FORMAT_R8G8B8A8_UNORM) || !pal8 )
+ return false;
+
+ // D3DFMT_P8 -> DXGI_FORMAT_R8G8B8A8_UNORM
+ {
+ const uint8_t* __restrict sPtr = reinterpret_cast<const uint8_t*>(pSource);
+ uint32_t * __restrict dPtr = reinterpret_cast<uint32_t*>(pDestination);
+
+ for( size_t ocount = 0, icount = 0; ((icount < inSize) && (ocount < outSize)); ++icount, ocount += 4 )
+ {
+ uint8_t t = *(sPtr++);
+
+ *(dPtr++) = pal8[ t ];
+ }
+ }
+ return true;
+
+ case TEXP_LEGACY_A8P8:
+ if ( (outFormat != DXGI_FORMAT_R8G8B8A8_UNORM) || !pal8 )
+ return false;
+
+ // D3DFMT_A8P8 -> DXGI_FORMAT_R8G8B8A8_UNORM
+ {
+ const uint16_t* __restrict sPtr = reinterpret_cast<const uint16_t*>(pSource);
+ uint32_t * __restrict dPtr = reinterpret_cast<uint32_t*>(pDestination);
+
+ for( size_t ocount = 0, icount = 0; ((icount < inSize) && (ocount < outSize)); icount += 2, ocount += 4 )
+ {
+ uint16_t t = *(sPtr++);
+
+ uint32_t t1 = pal8[ t & 0xff ];
+ uint32_t ta = ( flags & TEXP_SCANLINE_SETALPHA ) ? 0xff000000 : ((t & 0xff00) << 16);
+
+ *(dPtr++) = t1 | ta;
+ }
+ }
+ return true;
+
+ case TEXP_LEGACY_A4L4:
+ switch( outFormat )
+ {
+#ifdef DXGI_1_2_FORMATS
+ case DXGI_FORMAT_B4G4R4A4_UNORM :
+ // D3DFMT_A4L4 -> DXGI_FORMAT_B4G4R4A4_UNORM
+ {
+ const uint8_t * __restrict sPtr = reinterpret_cast<const uint8_t*>(pSource);
+ uint16_t * __restrict dPtr = reinterpret_cast<uint16_t*>(pDestination);
+
+ for( size_t ocount = 0, icount = 0; ((icount < inSize) && (ocount < outSize)); ++icount, ocount += 2 )
+ {
+ uint8_t t = *(sPtr++);
+
+ uint16_t t1 = (t & 0x0f);
+ uint16_t ta = ( flags & TEXP_SCANLINE_SETALPHA ) ? 0xf000 : ((t & 0xf0) << 8);
+
+ *(dPtr++) = t1 | (t1 << 4) | (t1 << 8) | ta;
+ }
+ }
+ return true;
+#endif // DXGI_1_2_FORMATS
+
+ case DXGI_FORMAT_R8G8B8A8_UNORM:
+ // D3DFMT_A4L4 -> DXGI_FORMAT_R8G8B8A8_UNORM
+ {
+ const uint8_t * __restrict sPtr = reinterpret_cast<const uint8_t*>(pSource);
+ uint32_t * __restrict dPtr = reinterpret_cast<uint32_t*>(pDestination);
+
+ for( size_t ocount = 0, icount = 0; ((icount < inSize) && (ocount < outSize)); ++icount, ocount += 4 )
+ {
+ uint8_t t = *(sPtr++);
+
+ uint32_t t1 = ((t & 0x0f) << 4) | (t & 0x0f);
+ uint32_t ta = ( flags & TEXP_SCANLINE_SETALPHA ) ? 0xff000000 : (((t & 0xf0) << 24) | ((t & 0xf0) << 20));
+
+ *(dPtr++) = t1 | (t1 << 8) | (t1 << 16) | ta;
+ }
+ }
+ return true;
+ }
+ break;
+
+#ifndef DXGI_1_2_FORMATS
+ case TEXP_LEGACY_B4G4R4A4:
+ if (outFormat != DXGI_FORMAT_R8G8B8A8_UNORM)
+ return false;
+
+ // D3DFMT_A4R4G4B4 -> DXGI_FORMAT_R8G8B8A8_UNORM
+ {
+ const uint16_t * __restrict sPtr = reinterpret_cast<const uint16_t*>(pSource);
+ uint32_t * __restrict dPtr = reinterpret_cast<uint32_t*>(pDestination);
+
+ for( size_t ocount = 0, icount = 0; ((icount < inSize) && (ocount < outSize)); icount += 2, ocount += 4 )
+ {
+ uint16_t t = *(sPtr++);
+
+ uint32_t t1 = ((t & 0x0f00) >> 4) | ((t & 0x0f00) >> 8);
+ uint32_t t2 = ((t & 0x00f0) << 8) | ((t & 0x00f0) << 4);
+ uint32_t t3 = ((t & 0x000f) << 20) | ((t & 0x000f) << 16);
+ uint32_t ta = ( flags & TEXP_SCANLINE_SETALPHA ) ? 0xff000000 : (((t & 0xf000) << 16) | ((t & 0xf000) << 12));
+
+ *(dPtr++) = t1 | t2 | t3 | ta;
+ }
+ }
+ return true;
+#endif
+ }
+
+ return false;
+}
+
+
+//-------------------------------------------------------------------------------------
+// Converts or copies image data from pPixels into scratch image data
+//-------------------------------------------------------------------------------------
+static HRESULT _CopyImage( _In_bytecount_(size) const void* pPixels, _In_ size_t size,
+ _In_ const TexMetadata& metadata, _In_ DWORD cpFlags, _In_ DWORD convFlags, _In_opt_count_c_(256) const uint32_t *pal8, _In_ const ScratchImage& image )
+{
+ assert( pPixels );
+ assert( image.GetPixels() );
+
+ if ( !size )
+ return E_FAIL;
+
+ if ( convFlags & CONV_FLAGS_EXPAND )
+ {
+ if ( convFlags & CONV_FLAGS_888 )
+ cpFlags |= CP_FLAGS_24BPP;
+ else if ( convFlags & (CONV_FLAGS_565 | CONV_FLAGS_5551 | CONV_FLAGS_4444 | CONV_FLAGS_8332 | CONV_FLAGS_A8P8 ) )
+ cpFlags |= CP_FLAGS_16BPP;
+ else if ( convFlags & (CONV_FLAGS_44 | CONV_FLAGS_332 | CONV_FLAGS_PAL8) )
+ cpFlags |= CP_FLAGS_8BPP;
+ }
+
+ size_t pixelSize, nimages;
+ _DetermineImageArray( metadata, cpFlags, nimages, pixelSize );
+ if ( (nimages == 0) || (nimages != image.GetImageCount()) )
+ {
+ return E_FAIL;
+ }
+
+ assert( pixelSize <= size );
+
+ std::unique_ptr<Image[]> timages( new Image[nimages] );
+ if ( !_SetupImageArray( (uint8_t*)pPixels, size, metadata, cpFlags, timages.get(), nimages ) )
+ {
+ return E_FAIL;
+ }
+
+ if ( nimages != image.GetImageCount() )
+ {
+ return E_FAIL;
+ }
+
+ const Image* images = image.GetImages();
+ if ( !images )
+ {
+ return E_FAIL;
+ }
+
+ DWORD tflags = (convFlags & CONV_FLAGS_NOALPHA) ? TEXP_SCANLINE_SETALPHA : 0;
+ if ( convFlags & CONV_FLAGS_SWIZZLE )
+ tflags |= TEXP_SCANLINE_LEGACY;
+
+ switch (metadata.dimension)
+ {
+ case TEX_DIMENSION_TEXTURE1D:
+ case TEX_DIMENSION_TEXTURE2D:
+ {
+ size_t index = 0;
+ for( size_t item = 0; item < metadata.arraySize; ++item )
+ {
+ for( size_t level = 0; level < metadata.mipLevels; ++level, ++index )
+ {
+ if ( index >= nimages )
+ return E_FAIL;
+
+ if ( images[ index ].height != timages[ index ].height )
+ return E_FAIL;
+
+ size_t dpitch = images[ index ].rowPitch;
+ size_t spitch = timages[ index ].rowPitch;
+
+ const uint8_t *pSrc = const_cast<const uint8_t*>( timages[ index ].pixels );
+ if ( !pSrc )
+ return E_POINTER;
+
+ uint8_t *pDest = images[ index ].pixels;
+ if ( !pDest )
+ return E_POINTER;
+
+ if ( IsCompressed( metadata.format ) )
+ {
+ size_t csize = std::min<size_t>( images[ index ].slicePitch, timages[ index ].slicePitch );
+ memcpy_s( pDest, images[ index ].slicePitch, pSrc, csize );
+ }
+ else
+ {
+ for( size_t h = 0; h < images[ index ].height; ++h )
+ {
+ if ( convFlags & CONV_FLAGS_EXPAND )
+ {
+#ifdef DXGI_1_2_FORMATS
+ if ( convFlags & (CONV_FLAGS_565|CONV_FLAGS_5551|CONV_FLAGS_4444) )
+#else
+ if ( convFlags & (CONV_FLAGS_565|CONV_FLAGS_5551) )
+#endif
+ {
+ if ( !_ExpandScanline( pDest, dpitch, DXGI_FORMAT_R8G8B8A8_UNORM,
+ pSrc, spitch,
+ (convFlags & CONV_FLAGS_565) ? DXGI_FORMAT_B5G6R5_UNORM : DXGI_FORMAT_B5G5R5A1_UNORM,
+ tflags ) )
+ return E_FAIL;
+ }
+ else
+ {
+ TEXP_LEGACY_FORMAT lformat = _FindLegacyFormat( convFlags );
+ if ( !_LegacyExpandScanline( pDest, dpitch, metadata.format,
+ pSrc, spitch, lformat, pal8,
+ tflags ) )
+ return E_FAIL;
+ }
+ }
+ else if ( convFlags & CONV_FLAGS_SWIZZLE )
+ {
+ _SwizzleScanline( pDest, dpitch, pSrc, spitch,
+ metadata.format, tflags );
+ }
+ else
+ {
+ _CopyScanline( pDest, dpitch, pSrc, spitch,
+ metadata.format, tflags );
+ }
+
+ pSrc += spitch;
+ pDest += dpitch;
+ }
+ }
+ }
+ }
+ }
+ break;
+
+ case TEX_DIMENSION_TEXTURE3D:
+ {
+ size_t index = 0;
+ size_t d = metadata.depth;
+
+ for( size_t level = 0; level < metadata.mipLevels; ++level )
+ {
+ for( size_t slice = 0; slice < d; ++slice, ++index )
+ {
+ if ( index >= nimages )
+ return E_FAIL;
+
+ if ( images[ index ].height != timages[ index ].height )
+ return E_FAIL;
+
+ size_t dpitch = images[ index ].rowPitch;
+ size_t spitch = timages[ index ].rowPitch;
+
+ const uint8_t *pSrc = const_cast<const uint8_t*>( timages[ index ].pixels );
+ if ( !pSrc )
+ return E_POINTER;
+
+ uint8_t *pDest = images[ index ].pixels;
+ if ( !pDest )
+ return E_POINTER;
+
+ if ( IsCompressed( metadata.format ) )
+ {
+ size_t csize = std::min<size_t>( images[ index ].slicePitch, timages[ index ].slicePitch );
+ memcpy_s( pDest, images[ index ].slicePitch, pSrc, csize );
+ }
+ else
+ {
+ for( size_t h = 0; h < images[ index ].height; ++h )
+ {
+ if ( convFlags & CONV_FLAGS_EXPAND )
+ {
+#ifdef DXGI_1_2_FORMATS
+ if ( convFlags & (CONV_FLAGS_565|CONV_FLAGS_5551|CONV_FLAGS_4444) )
+#else
+ if ( convFlags & (CONV_FLAGS_565|CONV_FLAGS_5551) )
+#endif
+ {
+ if ( !_ExpandScanline( pDest, dpitch, DXGI_FORMAT_R8G8B8A8_UNORM,
+ pSrc, spitch,
+ (convFlags & CONV_FLAGS_565) ? DXGI_FORMAT_B5G6R5_UNORM : DXGI_FORMAT_B5G5R5A1_UNORM,
+ tflags ) )
+ return E_FAIL;
+ }
+ else
+ {
+ TEXP_LEGACY_FORMAT lformat = _FindLegacyFormat( convFlags );
+ if ( !_LegacyExpandScanline( pDest, dpitch, metadata.format,
+ pSrc, spitch, lformat, pal8,
+ tflags ) )
+ return E_FAIL;
+ }
+ }
+ else if ( convFlags & CONV_FLAGS_SWIZZLE )
+ {
+ _SwizzleScanline( pDest, dpitch, pSrc, spitch, metadata.format, tflags );
+ }
+ else
+ {
+ _CopyScanline( pDest, dpitch, pSrc, spitch, metadata.format, tflags );
+ }
+
+ pSrc += spitch;
+ pDest += dpitch;
+ }
+ }
+ }
+
+ if ( d > 1 )
+ d >>= 1;
+ }
+ }
+ break;
+
+ default:
+ return E_FAIL;
+ }
+
+ return S_OK;
+}
+
+static HRESULT _CopyImageInPlace( DWORD convFlags, _In_ const ScratchImage& image )
+{
+ if ( !image.GetPixels() )
+ return E_FAIL;
+
+ const Image* images = image.GetImages();
+ if ( !images )
+ return E_FAIL;
+
+ const TexMetadata& metadata = image.GetMetadata();
+
+ DWORD tflags = (convFlags & CONV_FLAGS_NOALPHA) ? TEXP_SCANLINE_SETALPHA : 0;
+ if ( convFlags & CONV_FLAGS_SWIZZLE )
+ tflags |= TEXP_SCANLINE_LEGACY;
+
+ for( size_t i = 0; i < image.GetImageCount(); ++i )
+ {
+ const Image* img = &images[ i ];
+ uint8_t *pPixels = img->pixels;
+ if ( !pPixels )
+ return E_POINTER;
+
+ size_t rowPitch = img->rowPitch;
+
+ for( size_t h = 0; h < img->height; ++h )
+ {
+ if ( convFlags & CONV_FLAGS_SWIZZLE )
+ {
+ _SwizzleScanline( pPixels, rowPitch, pPixels, rowPitch, metadata.format, tflags );
+ }
+ else
+ {
+ _CopyScanline( pPixels, rowPitch, pPixels, rowPitch, metadata.format, tflags );
+ }
+
+ pPixels += rowPitch;
+ }
+ }
+
+ return S_OK;
+}
+
+
+//=====================================================================================
+// Entry-points
+//=====================================================================================
+
+//-------------------------------------------------------------------------------------
+// Obtain metadata from DDS file in memory/on disk
+//-------------------------------------------------------------------------------------
+
+HRESULT GetMetadataFromDDSMemory( LPCVOID pSource, size_t size, DWORD flags, TexMetadata& metadata )
+{
+ if ( !pSource || size == 0 )
+ return E_INVALIDARG;
+
+ return _DecodeDDSHeader( pSource, size, flags, metadata, 0 );
+}
+
+HRESULT GetMetadataFromDDSFile( LPCWSTR szFile, DWORD flags, TexMetadata& metadata )
+{
+ if ( !szFile )
+ return E_INVALIDARG;
+
+#if (_WIN32_WINNT >= 0x0602 /*_WIN32_WINNT_WIN8*/)
+ ScopedHandle hFile( safe_handle( CreateFile2( szFile, GENERIC_READ, FILE_SHARE_READ, OPEN_EXISTING, 0 ) ) );
+#else
+ ScopedHandle hFile( safe_handle( CreateFileW( szFile, GENERIC_READ, FILE_SHARE_READ, 0, OPEN_EXISTING,
+ FILE_FLAG_SEQUENTIAL_SCAN, 0 ) ) );
+#endif
+ if ( !hFile )
+ {
+ return HRESULT_FROM_WIN32( GetLastError() );
+ }
+
+ // Get the file size
+ LARGE_INTEGER fileSize = {0};
+
+#if (_WIN32_WINNT >= _WIN32_WINNT_VISTA)
+ FILE_STANDARD_INFO fileInfo;
+ if ( !GetFileInformationByHandleEx( hFile.get(), FileStandardInfo, &fileInfo, sizeof(fileInfo) ) )
+ {
+ return HRESULT_FROM_WIN32( GetLastError() );
+ }
+ fileSize = fileInfo.EndOfFile;
+#else
+ if ( !GetFileSizeEx( hFile.get(), &fileSize ) )
+ {
+ return HRESULT_FROM_WIN32( GetLastError() );
+ }
+#endif
+
+ // File is too big for 32-bit allocation, so reject read (4 GB should be plenty large enough for a valid DDS file)
+ if ( fileSize.HighPart > 0 )
+ {
+ return HRESULT_FROM_WIN32( ERROR_FILE_TOO_LARGE );
+ }
+
+ // Need at least enough data to fill the standard header and magic number to be a valid DDS
+ if ( fileSize.LowPart < ( sizeof(DDS_HEADER) + sizeof(uint32_t) ) )
+ {
+ return E_FAIL;
+ }
+
+ // Read the header in (including extended header if present)
+ const size_t MAX_HEADER_SIZE = sizeof(uint32_t) + sizeof(DDS_HEADER) + sizeof(DDS_HEADER_DXT10);
+ uint8_t header[MAX_HEADER_SIZE];
+
+ DWORD bytesRead = 0;
+ if ( !ReadFile( hFile.get(), header, MAX_HEADER_SIZE, &bytesRead, 0 ) )
+ {
+ return HRESULT_FROM_WIN32( GetLastError() );
+ }
+
+ return _DecodeDDSHeader( header, bytesRead, flags, metadata, 0 );
+}
+
+
+//-------------------------------------------------------------------------------------
+// Load a DDS file in memory
+//-------------------------------------------------------------------------------------
+HRESULT LoadFromDDSMemory( LPCVOID pSource, size_t size, DWORD flags, TexMetadata* metadata, ScratchImage& image )
+{
+ if ( !pSource || size == 0 )
+ return E_INVALIDARG;
+
+ image.Release();
+
+ DWORD convFlags = 0;
+ TexMetadata mdata;
+ HRESULT hr = _DecodeDDSHeader( pSource, size, flags, mdata, &convFlags );
+ if ( FAILED(hr) )
+ return hr;
+
+ size_t offset = sizeof(uint32_t) + sizeof(DDS_HEADER);
+ if ( convFlags & CONV_FLAGS_DX10 )
+ offset += sizeof(DDS_HEADER_DXT10);
+
+ assert( offset <= size );
+
+ const uint32_t *pal8 = nullptr;
+ if ( convFlags & CONV_FLAGS_PAL8 )
+ {
+ pal8 = reinterpret_cast<const uint32_t*>( reinterpret_cast<const uint8_t*>(pSource) + offset );
+ assert( pal8 );
+ offset += ( 256 * sizeof(uint32_t) );
+ if ( size < offset )
+ return E_FAIL;
+ }
+
+ hr = image.Initialize( mdata );
+ if ( FAILED(hr) )
+ return hr;
+
+ LPCVOID pPixels = reinterpret_cast<LPCVOID>( reinterpret_cast<const uint8_t*>(pSource) + offset );
+ assert( pPixels );
+ hr = _CopyImage( pPixels, size - offset, mdata,
+ (flags & DDS_FLAGS_LEGACY_DWORD) ? CP_FLAGS_LEGACY_DWORD : CP_FLAGS_NONE, convFlags, pal8, image );
+ if ( FAILED(hr) )
+ {
+ image.Release();
+ return hr;
+ }
+ if ( metadata )
+ memcpy( metadata, &mdata, sizeof(TexMetadata) );
+
+ return S_OK;
+}
+
+
+//-------------------------------------------------------------------------------------
+// Load a DDS file from disk
+//-------------------------------------------------------------------------------------
+HRESULT LoadFromDDSFile( LPCWSTR szFile, DWORD flags, TexMetadata* metadata, ScratchImage& image )
+{
+ if ( !szFile )
+ return E_INVALIDARG;
+
+ image.Release();
+
+#if (_WIN32_WINNT >= 0x0602 /*_WIN32_WINNT_WIN8*/)
+ ScopedHandle hFile( safe_handle ( CreateFile2( szFile, GENERIC_READ, FILE_SHARE_READ, OPEN_EXISTING, 0 ) ) );
+#else
+ ScopedHandle hFile( safe_handle ( CreateFileW( szFile, GENERIC_READ, FILE_SHARE_READ, 0, OPEN_EXISTING,
+ FILE_FLAG_SEQUENTIAL_SCAN, 0 ) ) );
+#endif
+
+ if ( !hFile )
+ {
+ return HRESULT_FROM_WIN32( GetLastError() );
+ }
+
+ // Get the file size
+ LARGE_INTEGER fileSize = {0};
+
+#if (_WIN32_WINNT >= _WIN32_WINNT_VISTA)
+ FILE_STANDARD_INFO fileInfo;
+ if ( !GetFileInformationByHandleEx( hFile.get(), FileStandardInfo, &fileInfo, sizeof(fileInfo) ) )
+ {
+ return HRESULT_FROM_WIN32( GetLastError() );
+ }
+ fileSize = fileInfo.EndOfFile;
+#else
+ if ( !GetFileSizeEx( hFile.get(), &fileSize ) )
+ {
+ return HRESULT_FROM_WIN32( GetLastError() );
+ }
+#endif
+
+ // File is too big for 32-bit allocation, so reject read (4 GB should be plenty large enough for a valid DDS file)
+ if ( fileSize.HighPart > 0 )
+ {
+ return HRESULT_FROM_WIN32( ERROR_FILE_TOO_LARGE );
+ }
+
+ // Need at least enough data to fill the standard header and magic number to be a valid DDS
+ if ( fileSize.LowPart < ( sizeof(DDS_HEADER) + sizeof(uint32_t) ) )
+ {
+ return E_FAIL;
+ }
+
+ // Read the header in (including extended header if present)
+ const size_t MAX_HEADER_SIZE = sizeof(uint32_t) + sizeof(DDS_HEADER) + sizeof(DDS_HEADER_DXT10);
+ uint8_t header[MAX_HEADER_SIZE];
+
+ DWORD bytesRead = 0;
+ if ( !ReadFile( hFile.get(), header, MAX_HEADER_SIZE, &bytesRead, 0 ) )
+ {
+ return HRESULT_FROM_WIN32( GetLastError() );
+ }
+
+ DWORD convFlags = 0;
+ TexMetadata mdata;
+ HRESULT hr = _DecodeDDSHeader( header, bytesRead, flags, mdata, &convFlags );
+ if ( FAILED(hr) )
+ return hr;
+
+ DWORD offset = MAX_HEADER_SIZE;
+
+ if ( !(convFlags & CONV_FLAGS_DX10) )
+ {
+ // Must reset file position since we read more than the standard header above
+ LARGE_INTEGER filePos = { sizeof(uint32_t) + sizeof(DDS_HEADER), 0};
+ if ( !SetFilePointerEx( hFile.get(), filePos, 0, FILE_BEGIN ) )
+ {
+ return HRESULT_FROM_WIN32( GetLastError() );
+ }
+
+ offset = sizeof(uint32_t) + sizeof(DDS_HEADER);
+ }
+
+ std::unique_ptr<uint32_t[]> pal8;
+ if ( convFlags & CONV_FLAGS_PAL8 )
+ {
+ pal8.reset( new uint32_t[256] );
+ if ( !pal8 )
+ {
+ return E_OUTOFMEMORY;
+ }
+
+ if ( !ReadFile( hFile.get(), pal8.get(), 256 * sizeof(uint32_t), &bytesRead, 0 ) )
+ {
+ return HRESULT_FROM_WIN32( GetLastError() );
+ }
+
+ if ( bytesRead != (256 * sizeof(uint32_t)) )
+ {
+ return E_FAIL;
+ }
+
+ offset += ( 256 * sizeof(uint32_t) );
+ }
+
+ DWORD remaining = fileSize.LowPart - offset;
+ if ( remaining == 0 )
+ return E_FAIL;
+
+ hr = image.Initialize( mdata );
+ if ( FAILED(hr) )
+ return hr;
+
+ if ( (convFlags & CONV_FLAGS_EXPAND) || (flags & DDS_FLAGS_LEGACY_DWORD) )
+ {
+ std::unique_ptr<uint8_t[]> temp( new uint8_t[ remaining ] );
+ if ( !temp )
+ {
+ image.Release();
+ return E_OUTOFMEMORY;
+ }
+
+ if ( !ReadFile( hFile.get(), temp.get(), remaining, &bytesRead, 0 ) )
+ {
+ image.Release();
+ return HRESULT_FROM_WIN32( GetLastError() );
+ }
+
+ if ( bytesRead != remaining )
+ {
+ image.Release();
+ return E_FAIL;
+ }
+
+ hr = _CopyImage( temp.get(), remaining, mdata,
+ (flags & DDS_FLAGS_LEGACY_DWORD) ? CP_FLAGS_LEGACY_DWORD : CP_FLAGS_NONE,
+ convFlags, pal8.get(), image );
+ if ( FAILED(hr) )
+ {
+ image.Release();
+ return hr;
+ }
+ }
+ else
+ {
+ if ( remaining > image.GetPixelsSize() )
+ {
+ image.Release();
+ return E_FAIL;
+ }
+
+ if ( !ReadFile( hFile.get(), image.GetPixels(), static_cast<DWORD>( image.GetPixelsSize() ), &bytesRead, 0 ) )
+ {
+ image.Release();
+ return HRESULT_FROM_WIN32( GetLastError() );
+ }
+
+ if ( convFlags & (CONV_FLAGS_SWIZZLE|CONV_FLAGS_NOALPHA) )
+ {
+ // Swizzle/copy image in place
+ hr = _CopyImageInPlace( convFlags, image );
+ if ( FAILED(hr) )
+ {
+ image.Release();
+ return hr;
+ }
+ }
+ }
+
+ if ( metadata )
+ memcpy( metadata, &mdata, sizeof(TexMetadata) );
+
+ return S_OK;
+}
+
+
+//-------------------------------------------------------------------------------------
+// Save a DDS file to memory
+//-------------------------------------------------------------------------------------
+HRESULT SaveToDDSMemory( const Image* images, size_t nimages, const TexMetadata& metadata, DWORD flags, Blob& blob )
+{
+ if ( !images || (nimages == 0) )
+ return E_INVALIDARG;
+
+ // Determine memory required
+ size_t required = 0;
+ HRESULT hr = _EncodeDDSHeader( metadata, flags, 0, 0, required );
+ if ( FAILED(hr) )
+ return hr;
+
+ for( size_t i = 0; i < nimages; ++i )
+ {
+ required += images[ i ].slicePitch;
+ if ( !images[ i ].pixels )
+ return E_POINTER;
+ }
+
+ assert( required > 0 );
+
+ blob.Release();
+
+ hr = blob.Initialize( required );
+ if ( FAILED(hr) )
+ return hr;
+
+ uint8_t* pDestination = reinterpret_cast<uint8_t*>( blob.GetBufferPointer() );
+ assert( pDestination );
+
+ hr = _EncodeDDSHeader( metadata, flags, pDestination, blob.GetBufferSize(), required );
+ if ( FAILED(hr) )
+ {
+ blob.Release();
+ return hr;
+ }
+
+ size_t remaining = blob.GetBufferSize() - required;
+ pDestination += required;
+
+ if ( !remaining )
+ {
+ blob.Release();
+ return E_FAIL;
+ }
+
+ switch( metadata.dimension )
+ {
+ case DDS_DIMENSION_TEXTURE1D:
+ case DDS_DIMENSION_TEXTURE2D:
+ {
+ size_t index = 0;
+ for( size_t item = 0; item < metadata.arraySize; ++item )
+ {
+ for( size_t level = 0; level < metadata.mipLevels; ++level )
+ {
+ if ( index >= nimages )
+ {
+ blob.Release();
+ return E_FAIL;
+ }
+
+ size_t pixsize = images[ index ].slicePitch;
+ if ( memcpy_s( pDestination, remaining, images[ index ].pixels, pixsize ) )
+ {
+ blob.Release();
+ return E_FAIL;
+ }
+ pDestination += pixsize;
+ remaining -= pixsize;
+
+ ++index;
+ }
+ }
+ }
+ break;
+
+ case DDS_DIMENSION_TEXTURE3D:
+ {
+ if ( metadata.arraySize != 1 )
+ {
+ blob.Release();
+ return E_FAIL;
+ }
+
+ size_t d = metadata.depth;
+
+ size_t index = 0;
+ for( size_t level = 0; level < metadata.mipLevels; ++level )
+ {
+ for( size_t slice = 0; slice < d; ++slice )
+ {
+ if ( index >= nimages )
+ {
+ blob.Release();
+ return E_FAIL;
+ }
+
+ size_t pixsize = images[ index ].slicePitch;
+ if ( memcpy_s( pDestination, remaining, images[ index ].pixels, pixsize ) )
+ {
+ blob.Release();
+ return E_FAIL;
+ }
+ pDestination += pixsize;
+ remaining -= pixsize;
+
+ ++index;
+ }
+
+ if ( d > 1 )
+ d >>= 1;
+ }
+ }
+ break;
+
+ default:
+ blob.Release();
+ return E_FAIL;
+ }
+
+ return S_OK;
+}
+
+
+//-------------------------------------------------------------------------------------
+// Save a DDS file to disk
+//-------------------------------------------------------------------------------------
+HRESULT SaveToDDSFile( const Image* images, size_t nimages, const TexMetadata& metadata, DWORD flags, LPCWSTR szFile )
+{
+ if ( !szFile )
+ return E_INVALIDARG;
+
+ // Create DDS Header
+ const size_t MAX_HEADER_SIZE = sizeof(uint32_t) + sizeof(DDS_HEADER) + sizeof(DDS_HEADER_DXT10);
+ uint8_t header[MAX_HEADER_SIZE];
+ size_t required;
+ HRESULT hr = _EncodeDDSHeader( metadata, flags, header, MAX_HEADER_SIZE, required );
+ if ( FAILED(hr) )
+ return hr;
+
+ // Create file and write header
+#if (_WIN32_WINNT >= 0x0602 /*_WIN32_WINNT_WIN8*/)
+ ScopedHandle hFile( safe_handle( CreateFile2( szFile, GENERIC_WRITE, 0, CREATE_ALWAYS, 0 ) ) );
+#else
+ ScopedHandle hFile( safe_handle( CreateFileW( szFile, GENERIC_WRITE, 0, 0, CREATE_ALWAYS, 0, 0 ) ) );
+#endif
+ if ( !hFile )
+ {
+ return HRESULT_FROM_WIN32( GetLastError() );
+ }
+
+ DWORD bytesWritten;
+ if ( !WriteFile( hFile.get(), header, static_cast<DWORD>( required ), &bytesWritten, 0 ) )
+ {
+ return HRESULT_FROM_WIN32( GetLastError() );
+ }
+
+ if ( bytesWritten != required )
+ {
+ return E_FAIL;
+ }
+
+ // Write images
+ switch( metadata.dimension )
+ {
+ case DDS_DIMENSION_TEXTURE1D:
+ case DDS_DIMENSION_TEXTURE2D:
+ {
+ size_t index = 0;
+ for( size_t item = 0; item < metadata.arraySize; ++item )
+ {
+ for( size_t level = 0; level < metadata.mipLevels; ++level, ++index )
+ {
+ if ( index >= nimages )
+ return E_FAIL;
+
+ if ( !images[ index ].pixels )
+ return E_POINTER;
+
+ size_t pixsize = images[ index ].slicePitch;
+
+ if ( !WriteFile( hFile.get(), images[ index ].pixels, static_cast<DWORD>( pixsize ), &bytesWritten, 0 ) )
+ {
+ return HRESULT_FROM_WIN32( GetLastError() );
+ }
+
+ if ( bytesWritten != pixsize )
+ {
+ return E_FAIL;
+ }
+ }
+ }
+ }
+ break;
+
+ case DDS_DIMENSION_TEXTURE3D:
+ {
+ if ( metadata.arraySize != 1 )
+ return E_FAIL;
+
+ size_t d = metadata.depth;
+
+ size_t index = 0;
+ for( size_t level = 0; level < metadata.mipLevels; ++level )
+ {
+ for( size_t slice = 0; slice < d; ++slice, ++index )
+ {
+ if ( index >= nimages )
+ return E_FAIL;
+
+ if ( !images[ index ].pixels )
+ return E_POINTER;
+
+ size_t pixsize = images[ index ].slicePitch;
+
+ if ( !WriteFile( hFile.get(), images[ index ].pixels, static_cast<DWORD>( pixsize ), &bytesWritten, 0 ) )
+ {
+ return HRESULT_FROM_WIN32( GetLastError() );
+ }
+
+ if ( bytesWritten != pixsize )
+ {
+ return E_FAIL;
+ }
+ }
+
+ if ( d > 1 )
+ d >>= 1;
+ }
+ }
+ break;
+
+ default:
+ return E_FAIL;
+ }
+
+ return S_OK;
+}
+
+}; // namespace
projects / apitrace / blobdiff