Sandman at 19:12, 14 April 2008

2008-04-14T19:12:44Z

←Older revision		Revision as of 19:12, 14 April 2008
Line 83:		Line 83:
	</pre>		</pre>

-	Note that <code>[[rgbscale]](0,map,1,1,1) = [[grayscale]](0,map,0)</code>.	+	Note that <code>[[rgbscale]](0,map,1,1,1) = [[grayscale]](0,map,0)</code> for a valid graphic (0,map).

	{{Funcbox		{{Funcbox
	\| category=Graphical effects		\| category=Graphical effects
	}}		}}

Sandman: New page: Category:functions Category:graphical effects ==Definition== '''INT''' grayscale ( <'''INT''' fileID> , <'''INT''' graphID> , <'''BYTE''' method> ) This will convert the specifie...

2008-04-14T19:10:35Z

New page: Category:functions Category:graphical effects ==Definition== '''INT''' grayscale ( <'''INT''' fileID> , <'''INT''' graphID> , <'''BYTE''' method> ) This will convert the specifie...

New page

[[Category:functions]]
[[Category:graphical effects]]

==Definition==
'''INT''' grayscale ( <'''INT''' fileID> , <'''INT''' graphID> , <'''BYTE''' method> )

This will convert the specified [[graphic]] by using the specified method; see [[#Notes|notes]] for the details.

== Parameters ==
{|
| '''INT''' fileID || - The [[fileID]] of the [[file]] that holds the graphics.
|-
| '''INT''' graphID || - The [[graphID]] of the [[graphic]] to convert.
|-
| '''BYTE''' method || - The method used (see [[#Notes|notes]]).
|}

== Returns ==
'''INT'''
{|
| -1 || - Invalid graphic.
|-
| 1 || - Success.
|}

== Errors ==
{|
| Unsupported color depth || - The graphic's color depth is not 16bit.
|}

== Notes ==
The exact formula is:
<pre>
c = 0.3 * oldpixel_r + 0.59 * oldpixel_g + 0.11 * oldpixel_b
</pre>

Method <code>0</code>:
<pre>
for every pixel:
newpixel_rgb = (c,c,c)
</pre>

Method <code>1</code>:
<pre>
for every pixel:
newpixel_rgb = (c,0,0)
</pre>

Method <code>2</code>:
<pre>
for every pixel:
newpixel_rgb = (0,c,0)
</pre>

Method <code>3</code>:
<pre>
for every pixel:
newpixel_rgb = (0,0,c)
</pre>

Method <code>4</code>:
<pre>
for every pixel:
newpixel_rgb = (c,c,0)
</pre>

Method <code>5</code>:
<pre>
for every pixel:
newpixel_rgb = (c,0,c)
</pre>

Method <code>6</code>:
<pre>
for every pixel:
newpixel_rgb = (0,c,c)
</pre>

Other methodnumbers:
<pre>
for every pixel:
newpixel_rgb = oldpixel_rgb
</pre>

Note that <code>[[rgbscale]](0,map,1,1,1) = [[grayscale]](0,map,0)</code>.

{{Funcbox
| category=Graphical effects
}}

Grayscale - Revision history

Sandman at 19:12, 14 April 2008

Sandman: New page: Category:functions Category:graphical effects ==Definition== '''INT''' grayscale ( <'''INT''' fileID> , <'''INT''' graphID> , <'''BYTE''' method> ) This will convert the specifie...