Updated for May 31, 2012 release
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DIRECTX TEXTURE LIBRARY (DirectXTex)
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Copyright (c) Microsoft Corporation. All rights reserved.
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May 31, 2012
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This package contains DirectXTex, a shared source library for reading and writing DDS
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files, and performing various texture content processing operations including
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resizing, format conversion, mip-map generation, block compression for Direct3D runtime
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texture resources, and height-map to normal-map conversion. This library makes
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use of the Windows Image Component (WIC) APIs. It also includes a simple .TGA reader and
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writer since this image file format is commonly used for texture content processing pipelines,
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but is not currently supported by a built-in WIC codec.
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The source is written for Visual C++ 2010 using the Direct3D headers from either
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a current DirectX SDK or Windows SDK. It can also be compiled using the VS 11 Beta and the
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Windows SDK 8.0 headers included with that release.
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It is recommended that you make use of Visual C++ 2010 Service Pack 1 or VS 11 Beta, and
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Windows 7 Service Pack 1 or the Windows 8 Consumer Preview.
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DDSTextureLoader\
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This contains a streamlined version of the DirectX SDK sample DDSWithoutD3DX11 texture
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loading code for a simple light-weight runtime DDS loader. This version only supports
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Direct3D 11 and performs no runtime pixel data conversions (i.e. 24bpp legacy DDS files
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always fail). This is ideal for runtime usage, and supports the full complement of
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Direct3D 11 texture resources (1D, 2D, volume maps, cubemaps, mipmap levels,
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texture arrays, BC formats, etc.).
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WICTextureLoader\
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This contains a Direct3D 11 2D texture loader that uses WIC to load a bitmap
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(BMP, JPEG, PNG, HD Photo, or other WIC supported file container), resize if needed
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based on the current feature level (or by explicit parameter), format convert to a
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DXGI_FORMAT if required, and then create a 2D texture. Furthermore, if a Direct3D 11
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device context is provided and the current device supports it for the given pixel format,
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it will auto-generate mipmaps. Note this does not support 1D textures, volume textures,
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cubemaps, or texture arrays. DDSTextureLoader is recommended for fully "precooked" textures
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for maximum performance and image quality, but this loader can be useful for creating
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simple 2D texture from standard image files at runtime.
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Note: This function is not thread-safe if given a non-NULL device context for the auto-gen
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mip-map support.
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DirectXTex\
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This contains the DirectXTex library. This includes a full-featured DDS reader and writer
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including legacy format conversions, a TGA reader and writer, a WIC-based bitmap reader and
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writer (BMP, JPEG, PNG, TIFF, and HD Photo), and various texture processing functions. This
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is intended primarily for tool usage.
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Note that the majority of the header files here are intended for internal implementation
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of the library only (BC.h, DDS.h, DirectXTexP.h, and scoped.h). Only DirectXTex.h is
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meant as a 'public' header for the library.
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Texconv\
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This DirectXTex sample is an implementation of the "texconv" command-line texture utility
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from the DirectX SDK utilizing DirectXTex rather than D3DX.
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It supports the same arguments as the Texture Conversion Tool Extended (texconvex.exe) DirectX
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SDK utility. See <http://msdn.microsoft.com/en-us/library/ee422506.aspx>. The primary differences
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are the -10 and -11 arguments are not applicable; the filter names (POINT, LINEAR, CUBIC,
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FANT, POINT_DITHER, LINEAR_DITHER, CUBIC_DITHER, FANT_DITHER); and support for the .TGA file format.
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This also includes support for JPEG XR/HD Photo bitmap formats (see
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<http://blogs.msdn.com/b/chuckw/archive/2011/01/19/known-issue-texconvex.aspx>)
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DDSView\
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This DirectXTex sample is a simple Direct3D 11-based viewer for DDS files. For array textures
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or volume maps, the "<" and ">" keyboard keys will show different images contained in the DDS.
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The "1" through "0" keys can also be used to jump to a specific image index.
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XNAMath\
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This contains a copy of XNA Math version 2.04, which is an updated version of the library. This is
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required if building content with USE_XNAMATH (the default for the VS 2010 projects). The VS 11
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projects use DirectXMath in the Windows SDK 8.0 instead.
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For details see <http://blogs.msdn.com/b/chuckw/archive/2011/02/23/xna-math-version-2-04.aspx>
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All content and source code for this package except XNA Math are bound to the Microsoft Public License (Ms-PL)
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<http://www.microsoft.com/en-us/openness/licenses.aspx#MPL>. The XNA Math library is subject
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to the DirectX SDK (June 2010) End-User License Agreement.
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http://go.microsoft.com/fwlink/?LinkId=248926
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------------------------------------
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RELEASE NOTES
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* The DirectXTex library does not support block compression or decompression of mipmapped non-power-of-2 textures,
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although DDSTextureLoader will load these files correctly if the underlying device supports it.
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* The DirectXTex library only supports CLAMP filtering, and does not yet support MIRROR or WRAP filtering
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(WIC operations only support CLAMP filtering).
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* The DirectXTex library only supports box and POINT filtering, and does not support LINEAR or CUBIC filtering,
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for 3D volume mipmap-generation.
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* Due to the underlying Windows BMP WIC codec, alpha channels are not supported for 16bpp or 32bpp BMP pixel format files. The Windows 8
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version of the Windows BMP WIC codec does support 32bpp pixel formats with alpha when using the BITMAPV5HEADER file header.
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* The WIC conversion cases currently ignore TEX_FILTER_SRGB_IN and TEX_FILTER_SRGB_OUT out.
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* For the DXGI 1.1 version of DirectXTex, 4:4:4:4 pixel format DDS files are always expanded to 8:8:8:8 upon load since DXGI 1.0
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and DXGI 1.1 versions of Direct3D do not support these resource formats. The DXGI 1.2 versions of DirectXTex and DDSTextureLoader
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make use of the DXGI_FORMAT_B4G4R4A4_UNORM format instead.
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* 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)
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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,
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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). The DXGI 1.2 version of WICTextureLoader
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will load 16bpp pixel images as 5:6:5 or 5:5:5:1 rather than expand them to 32bpp RGBA.
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* WICTextureLoader cannot load .TGA files unless the system has a 3rd party WIC codec installed. You must use the DirectXTex
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library for TGA file format support without relying on an add-on WIC codec.
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------------------------------------
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RELEASE HISTORY
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May 31, 2012: Minor fix for DDSTextureLoader's retry fallback that can happen with 10level9 feature levels
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Switched to use "_DEBUG" instead of "DEBUG" and cleaned up debug warnings
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added Metro style application project files for DirectXTex
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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
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March 30, 2012: WICTextureLoader updated with Windows 8 WIC pixel formats
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DirectXTex updated with limited non-power-of-2 texture support and TEX_FILTER_SEPARATE_ALPHA option
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Texconv updated with '-sepalpha' command-line option
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Added USE_XNAMATH control define to build DirectXTex using either XNAMath or DirectXMath
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Added VS 11 project files (which use DirectXMath instead of XNAMath and define DXGI_1_2_FORMATS)
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March 15, 2012: Fix for resource leak in CreateShaderResourceView() Direct3D 11 helper function in DirectXTex
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March 5, 2012: Fix for too much temp memory allocated by WICTextureLoader; cleaned up legacy 'min/max' macro usage in DirectXTex
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February 21, 2012: WICTextureLoader updated to handle systems and device drivers without BGRA or 16bpp format support
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February 20, 2012: Some code cleanup for DirectXTex and DDSTextureLoader
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Fixed bug in 10:10:10:2 format fixup in the LoadDDSFromMemory function
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Fixed bugs in "non-zero alpha" special-case handling in LoadTGAFromFile
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Fixed bug in _SwizzleScanline when copying alpha channel for BGRA<->RGBA swizzling
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February 11, 2012: Update of DDSTextureLoader to also build in Metro style apps; added WICTextureLoader
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Added CMYK WIC pixel formats to the DirectXTex conversion table
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January 30, 2012: Minor code-cleanup for DirectXTex to enable use of PCH through 'directxtexp.h' header
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January 24, 2011: Some code-cleanup for DirectXTex
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Added DXGI 1.2 implementation for DDSTextureLoader and DirectXTex guarded with DXGI_1_2_FORMATS compiliation define
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December 16, 2011: Fixed x64 compilation warnings in DDSTextureLoader
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November 30, 2011: Fixed some of the constants used in IsSupportedTexture(),
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added ability to strip off top levels of mips in DDSTextureLoader,
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changed DirectXTex to use CoCreateInstance rather than LoadLibrary to obtain the WIC factory,
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a few minor /analyze related annotations for DirectXTex
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October 27, 2011: Original release
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