📄 hgedata_hwcolor.html
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<h1 style="margin-top:0px">HGE Hardware color format</h1>
<p>
<b>S</b>everal <b>HGE</b> functions use color as a parameter or return value.
It is just a <b>DWORD</b>, containing four 8-bit values for Red, Green, Blue and Alpha
color components in the following way: <b>0xAARRGGBB</b>.
<br><br>
I.e. the highest <b>BYTE</b> of <b>DWORD</b> contains the Alpha value.
The next <b>BYTE</b> contains the Red value. Then goes Green value.
And the lowest <b>BYTE</b> contains Blue value.
</p>
<h2>Macros</h2>
<p>
You could use these macros to manipulate <b>DWORD</b> color values:
</p>
<pre>
ARGB(a,r,g,b)
((DWORD(a)<<24) + (DWORD(r)<<16) + (DWORD(g)<<8) + DWORD(b))
</pre>
<p>
<b>ARGB</b> macro builds a <b>DWORD</b> color value from it's components.
</p>
<pre>
GETA(col) ((col)>>24)
GETR(col) (((col)>>16) & 0xFF)
GETG(col) (((col)>>8) & 0xFF)
GETB(col) ((col) & 0xFF)
</pre>
<p>
<b>GETA</b>, <b>GETR</b>, <b>GETG</b> and <b>GETB</b> macros return the specified component of the composite <b>DWORD</b>.
</p>
<pre>
SETA(col,a) (((col) & 0x00FFFFFF) + (DWORD(a)<<24))
SETR(col,r) (((col) & 0xFF00FFFF) + (DWORD(r)<<16))
SETG(col,g) (((col) & 0xFFFF00FF) + (DWORD(g)<<8))
SETB(col,b) (((col) & 0xFFFFFF00) + DWORD(b))
</pre>
<p>
<b>SETA</b>, <b>SETR</b>, <b>SETG</b> and <b>SETB</b> macros change the specified component of the composite <b>DWORD</b>.
</p>
<h2>Requirements</h2>
<p>
<b>Header:</b> hge.h
</p>
<h2>See also</h2>
<p>
<a href="hgecolor__main.html">hgeColor helper class</a>
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