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clarified alpha support status (bug 1710013)

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@45734 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2007-05-01 14:34:53 +00:00
parent 2c17722ec8
commit c3316efa21
1 changed files with 6 additions and 4 deletions
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10
docs/latex/wx/image.tex
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@@ -36,10 +36,12 @@ means that the pixel is 100\% opaque.
Unlike RGB data, not all images have an alpha channel and before using
\helpref{GetAlpha}{wximagegetalpha} you should check if this image contains
an alpha channel with \helpref{HasAlpha}{wximagehasalpha}. Note that currently only
images loaded from PNG files with transparency information will have an alpha
channel but alpha support will be added to the other formats as well (as well
as support for saving images with alpha channel which also isn't implemented).
an alpha channel with \helpref{HasAlpha}{wximagehasalpha}. Note that currently
only the PNG format has full alpha channel support so only the images loaded
from PNG files can have alpha and, if you initialize the image alpha channel
yourself using \helpref{SetAlpha}{wximagesetalpha}, you should save it in PNG
format to avoid losing it.
\wxheading{Available image handlers}