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Updated PremultiplyAlpha (markdown)

Chuck Walbourn 2016-09-14 00:11:37 -07:00
parent 70e9663428
commit 9741faff3e
1 changed files with 3 additions and 3 deletions
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PremultiplyAlpha.md

@ -3,11 +3,11 @@ This converts an image assuming the original is not using premultiplied alpha in
**Breaking Change notice**: The 'flags' parameter was not present in the August 2013 and previous versions of DirectXTex.
HRESULT PremultiplyAlpha( const Image& srcImage, DWORD flags,
ScratchImage& image, bool reverse = false );
ScratchImage& image );
HRESULT PremultiplyAlpha( const Image* srcImages, size_t nimages,
const TexMetadata& metadata, DWORD flags,
ScratchImage& result, bool reverse = false );
ScratchImage& result );
# Parameters
@ -19,7 +19,7 @@ This controls color space transformation for conversions.
* *``TEX_PMALPHA_SRGB_OUT``* Indicates the output format is the sRGB format. This is implied if using a ``DXGI_FORMAT_*_SRGB`` format
* *``TEX_PMALPHA_SRGB``* This is the same as setting both ``TEX_PMALPHA_SRGB_IN`` and ``TEX_PMALPHA_SRGB_OUT``
_reverse_: If set to true, then the conversion goes from premultipled alpha to nonpremultipled alpha (a.k.a. straight alpha).
* *``TEX_PMALPHA_REVERSE`` If set to true, then the conversion goes from premultipled alpha to nonpremultipled alpha (a.k.a. straight alpha).
> Note that the conversion to premultipled alpha is not fully reversible. For example if alpha is 0, then all the color information becomes 0.