Admin at 18:46, 12 December 2014

2014-12-12T18:46:09Z

Admin: Created page with "= Action = Enable or disable writing of color components. &n..."

2014-12-12T18:44:49Z

Created page with "= Action = Enable or disable writing of color components. &n..."

New page

= Action =

Enable or disable writing of color components.

 

 

= Syntax =

ColorMask r, g ,b ,a 

 

 

= Remarks =
<div style="padding: 0px; margin: 0px;">
{| cellspacing="0" cellpadding="0" border="0" style="border: none; border-spacing: 0px; border-collapse: collapse;"
|- style="vertical-align: top;"
| valign="top" width="65" style="width: 65px; border: 2px solid rgb(0, 0, 0);" |
r

| valign="top" width="767" style="width: 767px; border: 2px solid rgb(0, 0, 0);" |
Enable or disable the red channel update of the  FT800 color buffer. The initial value is 1 and means enable

|- style="vertical-align: top;"
| valign="top" width="65" style="width: 65px; border: 2px solid rgb(0, 0, 0);" |
g

| valign="top" width="767" style="width: 767px; border: 2px solid rgb(0, 0, 0);" |
Enable or disable the green channel update of the FT800 color buffer. The initial value is 1 and means enable

|- style="vertical-align: top;"
| valign="top" width="65" style="width: 65px; border: 2px solid rgb(0, 0, 0);" |
b

| valign="top" width="767" style="width: 767px; border: 2px solid rgb(0, 0, 0);" |
Enable or disable the blue channel update of the FT800 color buffer. The initial value is 1 and means enable

|- style="vertical-align: top;"
| valign="top" width="65" style="width: 65px; border: 2px solid rgb(0, 0, 0);" |
a

| valign="top" width="767" style="width: 767px; border: 2px solid rgb(0, 0, 0);" |
Enable or disable the alpha channel update of the FT800 color buffer. The initial value is 1 and means enable

|}
</div>
 

The color mask controls whether the color values of a pixel are updated.  Sometimes it is used to selectively update only the

red, green, blue or alpha channels of the image. More often, it is used to completely disable color updates while updating the

tag and stencil buffers.

 

 

= See also =

[[TagMask]]

 

 

= Example =

← Older revision		Revision as of 18:46, 12 December 2014
Line 69:		Line 69:

	= <span class="f_Header">Example</span> =		= <span class="f_Header">Example</span> =
		+
		+	<source lang="bascomavr">
		+	' Pseudocode
		+
		+	'Draw a '8' digit in the middle of the screen. Then paint an invisible 40-pixel circular
		+	'touch area into the tag buffer
		+
		+	Begin_G BITMAPS
		+	Vertex2II 68, 40, 31, &H38
		+	PointSize 40 * 16
		+	ColorMask 0, 0, 0, 0
		+	Begin_G POINTS
		+	Tag &H38
		+	Vertex2II 80, 60, 0, 0
		+	</source>[[File:Clip0079.png\|center\|Clip0079.png]]
		+
		+	<br/>{{Languages}}
		+
		+	[[Category:FT800 Commands]]

ColorMask - Revision history

Admin at 18:46, 12 December 2014

Admin: Created page with "= Action = Enable or disable writing of color components. &n..."