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Blendop grayscale
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| == 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 | ||
| }} | }} | ||
Revision as of 23:36, 17 January 2008
Contents |
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.
Parameters
| INT blendTable | - The blend table to modify. |
| FLOAT amount | - The mode to perform the grayscaling (see notes). |
Returns
INT : true
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() • | |
