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Revision as of 12:13, 17 January 2008 (edit) Sandman (Talk | contribs) (New page: Category:functions Category:Blendops ==Definition== '''INT''' blendop_grayscale ( <'''INT''' blendopID> , <'''INT''' mode> ) Modify the blend table of the blend operation...) ← Previous diff		Current revision (13:57, 25 May 2008) (edit) (undo) 86.72.151.199 (Talk) (→Parameters)
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	==Definition==		==Definition==
-	'''INT''' blendop_grayscale ( <'''INT''' blendopID> , <'''INT''' mode> )	+	'''INT''' blendop_grayscale ( <'''INT''' blendTable> , <'''INT''' mode> )
-	Modify the [[blend table]] of the [[blend operation]] by modifying the colours, so the compononts of one colour is the same (this makes them appear gray). This means that the [[graphic]] the blend operation is assigned to will appear gray.	+	Modify the [[blend table]] by modifying the colours, so the compononts of one colour is the same (this makes them appear gray). This means that the [[graphic]] the blend operation is assigned to will appear gray.
	The source section of the [[blend table]] will be modified; this will clear the destination section of the blend table.		The source section of the [[blend table]] will be modified; this will clear the destination section of the blend table.
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	== Parameters ==		== Parameters ==
	{|		{|
-	| '''INT''' blendopID || - The [[blendopID]] of the [[blendop]] to modify.	+	| '''INT''' blendTable || - The [[blend table]] to modify.
	|-		|-
-	| '''FLOAT''' amount || - The mode to perform the grayscaling (see [[#Notes|notes]]).	+	| '''INT''' mode || - The mode to perform the grayscaling (see [[#Notes|notes]]).
	|}		|}
	== Returns ==		== Returns ==
	'''INT''' : [[true]]		'''INT''' : [[true]]
		+
		+	== Notes ==
		+	* Method 1
		+	<code>
		+	component = 0.3*r+0.59*g+0.11*b
		+	colour = rgb ( component , component , component )
		+	</code>
		+
		+	* Method 2
		+	<code>
		+	max = r > g ? r > b ? r : g : g > b ? g : b ;
		+	min = r < g ? r < b ? r : g : g < b ? g : b ;
		+	component = ( max + min ) / 2
		+	colour = rgb ( component , component , component )
		+	</code>
		+
		+	* Method 3
		+	<code>
		+	max = r > g ? r > b ? r : g : g > b ? g : b ;
		+	colour = rgb ( max , max , max )
		+	</code>
	{{Funcbox		{{Funcbox
	| category = Blendops		| category = Blendops
	}}		}}

---

Current revision

Contents 1 Definition 2 Parameters 3 Returns 4 Notes

[edit] Definition

INT blendop_grayscale ( <INT blendTable> , <INT mode> )

Modify the blend table by modifying the colours, so the compononts of one colour is the same (this makes them appear gray). This means that the graphic the blend operation is assigned to will appear gray.

The source section of the blend table will be modified; this will clear the destination section of the blend table.

[edit] Parameters

INT blendTable	- The blend table to modify.
INT mode	- The mode to perform the grayscaling (see notes).

[edit] Returns

INT : true

[edit] Notes

• Method 1

component = 0.3*r+0.59*g+0.11*b colour = rgb ( component , component , component )

• Method 2

max = r > g ? r > b ? r : g : g > b ? g : b ; min = r < g ? r < b ? r : g : g < b ? g : b ; component = ( max + min ) / 2 colour = rgb ( component , component , component )

• Method 3

max = r > g ? r > b ? r : g : g > b ? g : b ; colour = rgb ( max , max , max )

Blendops Functions

• Blendop_apply() • Blendop_assign() • Blendop_free() • Blendop_grayscale() • Blendop_identity() • Blendop_intensity() • Blendop_new() • Blendop_swap() • Blendop_tint() • Blendop_translucency() •