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DirectXTex/ReadMe.txt
Chuck Walbourn c123b8e37e July 26, 2017
2017-07-26 18:26:43 -07:00

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DIRECTX TEXTURE LIBRARY (DirectXTex)
------------------------------------
Copyright (c) Microsoft Corporation. All rights reserved.
July 26, 2017
This package contains DirectXTex, a shared source library for reading and writing DDS
files, and performing various texture content processing operations including
resizing, format conversion, mip-map generation, block compression for Direct3D runtime
texture resources, and height-map to normal-map conversion. This library makes
use of the Windows Image Component (WIC) APIs. It also includes simple .TGA and .HDR
readers and writers since these image file formats are commonly used for texture content
processing pipelines, but are not currently supported by a built-in WIC codec.
The source is written for Visual Studio 2013 or 2015. It is recommended that you
make use of VS 2013 Update 5 or VS 2015 Update 3 and Windows 7 Service Pack 1 or later.
DirectXTex\
This contains the DirectXTex library. This includes a full-featured DDS reader and writer
including legacy format conversions, a TGA reader and writer, a HDR reader and writer,
a WIC-based bitmap reader and writer (BMP, JPEG, PNG, TIFF, and HD Photo), and various
texture processing functions. This is intended primarily for tool usage.
Note that the majority of the header files here are intended for internal implementation
of the library only (BC.h, BCDirectCompute.h, DDS.h, DirectXTexP.h, filters.h, and scoped.h).
Only DirectXTex.h is meant as a 'public' header for the library.
Texconv\
This DirectXTex sample is an implementation of the "texconv" command-line texture utility
from the DirectX SDK utilizing DirectXTex rather than D3DX.
It supports the same arguments as the Texture Conversion Tool Extended (texconvex.exe) DirectX
SDK utility. The primary differences are the -10 and -11 arguments are not applicable and the
filter names (POINT, LINEAR, CUBIC, FANT or BOX, TRIANGLE, *_DITHER, *_DITHER_DIFFUSION).
This also includes support for the JPEG XR (HD Photo) bitmap format.
(see <http://blogs.msdn.com/b/chuckw/archive/2011/01/19/known-issue-texconvex.aspx>)
See <https://github.com/Microsoft/DirectXTex/wiki/Texconv> for details.
Texassemble\
This DirectXTex sample is a command-line utility for creating cubemaps, volume maps, or
texture arrays from a set of individual input image files.
See <https://github.com/Microsoft/DirectXTex/wiki/Texassemble> for details.
Texdiag\
This DirectXTex sample is a command-line utility for analyzing image contents, primarily for
debugging purposes.
See <https://github.com/Microsoft/DirectXTex/wiki/Texdiag>
DDSView\
This DirectXTex sample is a simple Direct3D 11-based viewer for DDS files. For array textures
or volume maps, the "<" and ">" keyboard keys will show different images contained in the DDS.
The "1" through "0" keys can also be used to jump to a specific image index.
DDSTextureLoader\
This contains a streamlined version of the DirectX SDK sample DDSWithoutD3DX11 texture
loading code for a simple light-weight runtime DDS loader. This version only supports
Direct3D 11 or Direct3D 12 and performs no runtime pixel data conversions (i.e. 24bpp
legacy DDS files always fail). This is ideal for runtime usage, and supports the full
complement of Direct3D texture resources (1D, 2D, volume maps, cubemaps, mipmap levels,
texture arrays, BC formats, etc.).
ScreenGrab\
This contains screen grab modules for Direct3D 11 and Direct3D 12 primarily intended
for creating screenshots. The images are written as a DDS or as an image file format
using WIC.
WICTextureLoader\
This contains a Direct3D 11 and Direct3D 12 2D texture loader that uses WIC to load a
bitmap (BMP, JPEG, PNG, HD Photo, or other WIC supported file container), resize if needed
based on the current feature level (or by explicit parameter), format convert to a
DXGI_FORMAT if required, and then create a 2D texture. Note this does not support 1D textures,
volume textures, cubemaps, or texture arrays. DDSTextureLoader is recommended for fully
"precooked" textures for maximum performance and image quality, but this loader can be useful
for creating simple 2D texture from standard image files at runtime.
NOTE: DDSTextureLoader, ScreenGrab, and WICTextureLoader are 'stand-alone' versions of the same
modules provided in the DirectX Tool Kit.
All content and source code for this package are subject to the terms of the MIT License.
<http://opensource.org/licenses/MIT>.
Documentation is available at <https://github.com/Microsoft/DirectXTex/wiki>.
For the latest version of DirectXTex, bug reports, etc. please visit the project site.
http://go.microsoft.com/fwlink/?LinkId=248926
This project has adopted the Microsoft Open Source Code of Conduct. For more information see the
Code of Conduct FAQ or contact opencode@microsoft.com with any additional questions or comments.
https://opensource.microsoft.com/codeofconduct/
------------------------------------
RELEASE NOTES
* The alpha mode specification for DDS files was updated between the March 2013 and April 2013 releases. Any
DDS files created using the DDS_FLAGS_FORCE_DX10_EXT_MISC2 flag or the texconv -dx10 switch using the
March 2013 release should be refreshed.
* Due to the underlying Windows BMP WIC codec, alpha channels are not supported for 16bpp or 32bpp BMP pixel format
files. The Windows 8.x and Windows 10 version of the Windows BMP WIC codec does support 32bpp pixel formats with
alpha when using the BITMAPV5HEADER file header. Note the updated WIC is available on Windows 7 SP1 with KB 2670838
installed.
* While DXGI 1.0 and DXGI 1.1 include 5:6:5 (DXGI_FORMAT_B5G6R5_UNORM) and 5:5:5:1 (DXGI_FORMAT_B5G5R5A1_UNORM)
pixel format enumerations, the DirectX 10.x and 11.0 Runtimes do not support these formats for use with Direct3D.
The DirectX 11.1 runtime, DXGI 1.2, and the WDDM 1.2 driver model fully support 16bpp formats (5:6:5, 5:5:5:1, and
4:4:4:4).
* WICTextureLoader cannot load .TGA or .HDR files unless the system has a 3rd party WIC codec installed. You
must use the DirectXTex library for TGA/HDR file format support without relying on an add-on WIC codec.
* Loading of 96bpp floating-point TIFF files results in a corrupted image prior to Windows 8. This fix is available
on Windows 7 SP1 with KB 2670838 installed.
------------------------------------
RELEASE HISTORY
July 26, 2017
Support for reading non-standard DDS files written by nVidia Texture Tools (NVTT)
Fix for ComputeMSE when using CMSE_IMAGE2_X2_BIAS
Fix for WIC writer then codec target format requires a palette
Code cleanup
April 24, 2017
VS 2017 project updates
Regenerated shaders using Windows 10 Creators Update SDK (15063)
Updated D3DX12 internal copy to latest version
April 7, 2017
VS 2017 updated for Windows Creators Update SDK (15063)
texassemble: -tonemap switch
texconv: -wicmulti switch
January 31, 2017
DirectX 12 versions of IsSupported, CreateTexture (PrepareUpload), and CaptureTexture
Update to DirectX 11 version of IsSupported
WIC format 40bppCMYKAlpha should be converted to RGBA8 rather than RGBA16
DDS support for L8A8 with bitcount 8 rather than 16
DXGI_FORMAT_R32G8X24_TYPELESS and DXGI_FORMAT_R24G8_TYPELESS should be IsDepthStencil formats
Updates to DDSTextureLoader, ScreenGrab, and WICTextureLoader
Minor code cleanup
December 5, 2016
Fixed over-validation in DDS header parsing
VS 2017 RC projects added
Minor code cleanup
October 5, 2016
*breaking change*
Renamed Evaluate to EvaluateImage, Transform to TransformImage
texdiag: new command-line tool for texture debugging
texconv: -bcmax, -bcquick, -tonemap, and -x2bias switches
texconv: overwrite writing and -y switch
texconv/texassemble: optional OpenEXR support
texassemble: command syntax with support for generating strip and cross images from cubemap
Updates to DDSTextureLoader, WICTextureLoader, and ScreenGrab
Minor code cleanup
September 14, 2016
HDR (RGBE Radiance) file format reader and writer
Evaluate and Transform functions for computing user-defined functions on images
Fix BC6H GPU shaders on WARP device
Fix for alignment issues on ARM devices in software compression codec
Added TEX_THRESHOLD_DEFAULT (0.5f) constant default alpha threshold value for Convert & Compress
Minor CaptureTexture optimization
texconv/texassemble: Support for .hdr file format
texconv: added -gpu switch to specify adapter to use for GPU-based compression codecs
texconv: added -badtails switch to enable loading of legacy DXTn DDS files with incomplete mipchain tails
texconv: added -c switch for old-school colorkey/chromakey transparency to alpha conversion
texconv: added -alpha switch for reverse premultiply along with TEX_PMALPHA_REVERSE flag
texconv: added wildcard support for input filename and optional -r switch for recursive search
August 4, 2016
CompileShader script updated to build external pdbs
Regenerated shaders using Windows 10 Anniversary Update SDK (14393)
August 2, 2016
Updated for VS 2015 Update 3 and Windows 10 SDK (14393)
August 1, 2016
Workaround for bug in XMStoreFloat3SE (impacts conversions to DXGI_FORMAT_R9G9B9E5_SHAREDEXP)
DDSTextureLoader12, WICTextureLoader12, and ScreenGrab12 for Direct3D 12 support
Minor code cleanup
June 27, 2016
texconv command-line tool -wicq and -wiclossless switches
Code cleanup
April 26, 2016
Optional callback from WIC reader functions to query additional metadata
Retired obsolete adapter code
Minor code cleanup
February 23, 2016
Fix to clean up partial or zero-length image files on failed write
Retired VS 2012 projects
November 30, 2015
texconv command-line tool -fl switch now supports 12.0 and 12.1 feature levels
Updated for VS 2015 Update 1 and Windows 10 SDK (10586)
October 30, 2015
DDS support for legacy bumpmap formats (V8U8, Q8W8V8U8, V16U16)
Fix for buffer overread in BC CPU compressor
Minor code cleanup
August 18, 2015
Added GetWICFactory and SetWICFactory
Updates for new DXGI 1.3 types
Xbox One platform updates
July 29, 2015
Fixed rounding problem with 32-bit RGBA/BGRA format conversions
texconv: use CPU parallel compression for BC1-BC5 (-singleproc disables)
Updated for VS 2015 and Windows 10 SDK RTM
Retired VS 2010 and Windows 8.0 Store projects
June 18, 2015
New BC_FLAGS_USE_3SUBSETS option for BC7 compressors; now defaults to skipping 3 subset blocks
Fixed bug with MakeTypeless and A8_UNORM
Fixed file length validation problem in LoadDDSFromFile
March 27, 2015
Added projects for Windows apps Technical Preview
Fixed bug with WIC-based mipmap generation for non-WIC supported formats
Fixed bug with WIC multiframe loader when resizing required
texconv: Added -nmap/-nmapamp for generating normal maps from height maps
texconv/texassemble: Updated to load multiframe WIC files (tiff, gif)
Minor code cleanup
November 24, 2014
Updates for Visual Studio 2015 Technical Preview
Minor code cleanup
September 22, 2014
Format conversion improvements and bug fixes (depth/stencil, alpha-only, float16, RGB -> 1 channel)
Fixed issue when BC decompressing non-standard compressed rowPitch images
Explicit calling-convention annotation for all 'public' functions
Code cleanup
Xbox One platform updates
July 15, 2014
texconv command-line tool fixes
Fixed problem with 'wide' images with CPU Compress
Updates to Xbox One platform support
April 3, 2014
Windows phone 8.1 platform support
February 24, 2014
Direct3D 11 video and Xbox One extended format support
New APIs: IsPlanar, IsPalettized, IsDepthStencil, ConvertToSinglePlane
Added 'alphaWeight' parameter to GPU Compress [breaking change]
texconv '-aw' switch to control the alpha weighting for the BC7 GPU compressor
Fixed bug with ordered dithering in non-WIC conversion codepaths
Fixed SaveToDDS* functions when using arbitrary row pitch values
January 24, 2014
Added sRGB flags for Compress (TEX_COMPRESS_SRGB*)
Added 'compress' flag parameter to GPU versions of Compress [breaking change]
Minor fix for potential rounding problem in GPU Compress
Code cleanup (removed DXGI_1_2_FORMATS control define; ScopedObject typedef removed)
Dropped VS 2010 support without the Windows 8.1 SDK (removed USE_XNAMATH control define)
December 24, 2013
texconv updated with -fl and -pow2 command-line switches
Fixed bug in Resize when doing custom filtering which occurred when exactly doubling the image size
Added move operators to ScratchImage and Blob classes
Xbox One platform support
October 21, 2013
Updated for Visual Studio 2013 and Windows 8.1 SDK RTM
PremultiplyAlpha updated with new 'flags' parameter and to use sRGB correct blending
Fixed colorspace conversion issue with DirectCompute compressor when compressing for BC7 SRGB
August 13, 2013
DirectCompute 4.0 BC6H/BC7 compressor integration
texconv utility uses DirectCompute compression by default for BC6H/BC7, -nogpu disables use of DirectCompute
August 1, 2013
Support for BC compression/decompression of non-power-of-2 mipmapped textures
Fixes for BC6H / BC7 codecs to better match published standard
Fix for BC4 / BC5 codecs when compressing RGB images
Minor fix for the BC1-3 codec
New optional flags for ComputeMSE to compare UNORM vs. SNORM images
New WIC loading flag added to control use of WIC metadata to return sRGB vs. non-sRGB formats
Code cleanup and /analyze fixes
Project file cleanup
Texconv utility uses parallel BC compression by default for BC6H/BC7, -singleproc disables multithreaded behavior
July 1, 2013
VS 2013 Preview projects added
SaveToWIC functions updated with new optional setCustomProps parameter
June 15, 2013
Custom filtering implementation for Resize & GenerateMipMaps(3D) - Point, Box, Linear, Cubic, and Triangle
TEX_FILTER_TRIANGLE finite low-pass triangle filter
TEX_FILTER_WRAP, TEX_FILTER_MIRROR texture semantics for custom filtering
TEX_FILTER_BOX alias for TEX_FILTER_FANT WIC
Ordered and error diffusion dithering for non-WIC conversion
sRGB gamma correct custom filtering and conversion
DDS_FLAGS_EXPAND_LUMINANCE - Reader conversion option for L8, L16, and A8L8 legacy DDS files
Added use of WIC metadata for sRGB pixel formats
Added BitsPerColor utility function
Fixed Convert threshold parameter usage
Non-power-of-2 volume map support, fixed bug with non-square volume maps
Texconv utility update with -xlum, -wrap, and -mirror options; reworked -if options for improved dithering
Texassemble utility for creating cubemaps, volume maps, and texture arrays
DDSTextureLoader and WICTextureLoader sync'd with DirectXTK versions
April 16, 2013
Updated alpha-mode metadata details in .DDS files
Added new control flags for Convert
Added new optional flags for ComputeMSE
Fixed conversion handling for sRGB formats
Fixed internal routines for handling R10G10B10_XR_BIAS_A2_UNORM, R9G9B9E5_SHAREDEXP, and FORMAT_R1_UNORM
Fixed WIC I/O for GUID_WICPixelFormat32bppRGBE pixel format files (HD Photo)
Fixed non-square image handling in GenerateMipMaps3D
Fixed some error handling in the DDS load code
March 22, 2013
Supports reading and writing alpha-mode (straight, premultiplied, etc.) metadata in .DDS files
Added build option to use WICCreateImagingFactory_Proxy instead of CoCreateInstance to obtain WIC factory
January 29, 2013
Added PremultiplyAlpha to DirectXTex; -pmalpha switch for texconv command-line tool
Fixed problem with forceSRGB implementation for Ex versions of CreateTexture, CreateShaderResourceView, DDSTextureLoader and WICTextureLoader
December 11, 2012
Ex versions of CreateTexture, CreateShaderResourceView, DDSTextureLoader and WICTextureLoader
Fixed BC2 and BC3 decompression issue for unusual color encoding case
Converted annotation to SAL2 for improved VS 2012 /analyze experience
Updated DirectXTex, DDSView, and Texconv with VS 2010 + Windows 8.0 SDK project using official 'property sheets'
November 15, 2012
Added support for WIC2 when available on Windows 8 and Windows 7 with KB 2670838
Added optional targetGUID parameter to SaveWIC* APIs to influence final container pixel format choice
Fixed bug in SaveDDS* which was generating invalid DDS files for 1D dimension textures
Improved robustness of CaptureTexture when resolving MSAA source textures
Sync'd DDSTextureLoader, ScreenGrab, and WICTextureLoader standalone versions with latest DirectXTK release
September 28, 2012
Added ScreenGrab module for creating runtime screenshots
Renamed project files for better naming consistency
New Typeless utilities for DirectXTex
Some minor code cleanup for DirectXTex's WIC writer function
Bug fixes and new -tu/-tf options for texconv
June 22, 2012
Moved to using XNA Math 2.05 instead of XNA Math 2.04 for USE_XNAMATH builds
Fixed BGR vs. RGB color channel swizzle problem with 24bpp legacy .DDS files in DirectXTex
Update to DirectXTex WIC and WICTextureLoader for additional 96bpp float format handling on Windows 8
May 31, 2012
Minor fix for DDSTextureLoader's retry fallback that can happen with 10level9 feature levels
Switched to use "_DEBUG" instead of "DEBUG" and cleaned up debug warnings
added Windows Store style application project files for DirectXTex
April 20, 2012
DirectTex's WIC-based writer opts-in for the Windows 8 BMP encoder option for writing 32 bpp RGBA files with the BITMAPV5HEADER
March 30, 2012
WICTextureLoader updated with Windows 8 WIC pixel formats
DirectXTex updated with limited non-power-of-2 texture support and TEX_FILTER_SEPARATE_ALPHA option
Texconv updated with '-sepalpha' command-line option
Added USE_XNAMATH control define to build DirectXTex using either XNAMath or DirectXMath
Added VS 2012 project files (which use DirectXMath instead of XNAMath and define DXGI_1_2_FORMATS)
March 15, 2012
Fix for resource leak in CreateShaderResourceView() Direct3D 11 helper function in DirectXTex
March 5, 2012
Fix for too much temp memory allocated by WICTextureLoader; cleaned up legacy 'min/max' macro usage in DirectXTex
February 21, 2012
WICTextureLoader updated to handle systems and device drivers without BGRA or 16bpp format support
February 20, 2012
Some code cleanup for DirectXTex and DDSTextureLoader
Fixed bug in 10:10:10:2 format fixup in the LoadDDSFromMemory function
Fixed bugs in "non-zero alpha" special-case handling in LoadTGAFromFile
Fixed bug in _SwizzleScanline when copying alpha channel for BGRA<->RGBA swizzling
February 11, 2012
Update of DDSTextureLoader to also build in Windows Store style apps; added WICTextureLoader
Added CMYK WIC pixel formats to the DirectXTex conversion table
January 30, 2012
Minor code-cleanup for DirectXTex to enable use of PCH through 'directxtexp.h' header
January 24, 2011
Some code-cleanup for DirectXTex
Added DXGI 1.2 implementation for DDSTextureLoader and DirectXTex guarded with DXGI_1_2_FORMATS compiliation define
December 16, 2011
Fixed x64 compilation warnings in DDSTextureLoader
November 30, 2011
Fixed some of the constants used in IsSupportedTexture(),
added ability to strip off top levels of mips in DDSTextureLoader,
changed DirectXTex to use CoCreateInstance rather than LoadLibrary to obtain the WIC factory,
a few minor /analyze related annotations for DirectXTex
October 27, 2011
Original release
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