Admin at 20:23, 12 December 2014

2014-12-12T20:23:51Z

Admin: Created page with "= Action = Clear buffers to preset values. (This is similar to CLS)
2014-12-12T20:20:50Z

Created page with "= Action = Clear buffers to preset values. (This is similar to CLS) Action =

Clear buffers to preset values.

(This is similar to CLS)

 

 

= Syntax =

Clear_B C,S,T 

 

 

= 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="101" style="width: 101px; border: 2px solid rgb(0, 0, 0);" |
C

| valign="top" width="808" style="width: 808px; border: 2px solid rgb(0, 0, 0);" |
Clear Color buffer. Setting this bit to 1 will clear the color buffer of the FT800 to the preset value.

Setting this bit to 0 will  maintain the color buffer of the FT800 with an unchanged value.

The preset value is defined in command [[ClearColorRGB]] for the RGB channel and [[ClearColorA]] for the alpha channel.

|- style="vertical-align: top;"
| valign="top" width="101" style="width: 101px; border: 2px solid rgb(0, 0, 0);" |
S

| valign="top" width="808" style="width: 808px; border: 2px solid rgb(0, 0, 0);" |
Clear Stencil  buffer. Setting this bit to 1 will clear the stencil buffer of the FT800  to  the  preset  value.

Setting this bit to 0 will maintain the stencil buffer of the FT800 with an unchanged value.

The preset value is defined in command [[ClearStencil]].

|- style="vertical-align: top;"
| valign="top" width="101" style="width: 101px; border: 2px solid rgb(0, 0, 0);" |
T

| valign="top" width="808" style="width: 808px; border: 2px solid rgb(0, 0, 0);" |
Clear Tag buffer. Setting this bit to 1 will clear the tag buffer of the FT800 to the  preset  value.

Setting this bit to 0 will maintain the tag buffer of the FT800 with an unchanged value.

The preset value is defined in command [[ClearTag]].

|}
</div>
 

The scissor test and the buffer write masks affect the operation of the clear. Scissor limits the cleared rectangle, and the buffer write  masks limit the affected buffers.

 

The state of the alpha function, blend function, and stenciling do not affect the clear.

 

 

= See also =

[[ClearColorA]], [[ClearStencil]], [[ClearTag]], [[ClearColorRGB]]

 

 

 

= Example =

← Older revision		Revision as of 20:23, 12 December 2014
Line 78:		Line 78:

	= <span class="f_Header">Example</span> =		= <span class="f_Header">Example</span> =
		+
		+	<source lang="bascomavr">
		+	' Pseudocode
		+	' To Clear the LCD to bright blue:
		+	ClearColorRGB 0, 0, 255
		+	Clear_B 1, 0, 0
		+	</source> [[File:Clip0099.png\|center\|Clip0099.png]] <source lang="bascomavr">
		+	' Pseudocode
		+	' To clear part of the screen to gray, part to blue using scissor rectangles:
		+	ClearColorRGB 100, 100, 100
		+	Clear_B 1, 1, 1
		+	ClearColorRGB 0, 0, 255
		+	ScissorScize 30, 120
		+	Clear_B 1, 1, 1
		+	</source> [[File:Clip0100.png\|center\|Clip0100.png]]
		+
		+
		+
		+	{{Languages}}
		+
		+	[[Category:FT800 Commands]]