diff options
Diffstat (limited to 'html/en/func/color.html')
| -rw-r--r-- | html/en/func/color.html | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/html/en/func/color.html b/html/en/func/color.html index 9ec9928..8efd8a4 100644 --- a/html/en/func/color.html +++ b/html/en/func/color.html @@ -52,12 +52,13 @@ cd.DecodeColor(color: lightuserdata) -> (r, g, b: number) [in Lua]</pre> cd.EncodeAlpha(color: lightuserdata, alpha: number) -> (color: lightuserdata) [in Lua]</pre> <p>Returns the given color coded with the alpha information. ATENTION: At the - moment only the Win32 with GDI+ and the IMAGERGB drivers support alpha - components in color coding. Se in <a href="../drv/gdiplus.html">Windows Using - GDI+ Base Driver</a> and <a href="../drv/irgb.html">IMAGERGB driver</a>. The + moment only the <a href="../drv/gdiplus.html">Win32 with GDI+</a>, the + <a href="../drv/xrender.html">XRender</a> and the <a href="../drv/irgb.html">IMAGERGB</a> + drivers support alpha components in color coding. The internal representation of the component is inverted, because the default value must be 0 and opaque for backward compatibility, so you should use the <strong>cdDecodeAlpha</strong> - function ot the <strong>cdAlpha</strong> macro to retrieve the alpha component.</p> + function or the <strong>cdAlpha</strong> macro to retrieve the alpha component. + 0 is transparent, 255 is opaque.</p> <pre class="function"><span class="mainFunction">unsigned char <a name="cdDecodeAlpha">cdDecodeAlpha</a>(long int color) [in C]</span> cd.DecodeAlpha(color: lightuserdata) -> (a: number) [in Lua]</pre> |