<enum> <realm>Client</realm> <description> These enums are used by <page>render.OverrideBlend</page> to determine what the Source and Destination color and alpha channel values for a given pixel will be multiplied by before they are sent to the <page text="Blend Function">enums/BLENDFUNC</page> to calculate the pixel's final color during draw operations. For an interactive demonstration of how these enums behave, see [Anders Riggelsen's Visual glBlendFunc Tool here](https://www.andersriggelsen.dk/glblendfunc.php) <upload src="19952/8d96354db95acb4.png" size="573673" name="image.png" />⤶⤶ <upload src="19952/8d96354db95acb4.png" size="573673" name="image.png" />⤶ </description> <items> <item key="BLEND_ZERO" value="0"> The Multiplier will be `r=0`, `g=0`, `b=0`, `a=0` This is useful for removing the Source or Destination from the final pixel color. </item> <item key="BLEND_ONE" value="1"> The Multiplier will be `r=1`, `g=1`, `b=1`, `a=1` This is useful for keeping the Source or Destination as their starting values. </item> <item key="BLEND_DST_COLOR" value="2"> The Multiplier will be the same as the Destination color and alpha. </item> <item key="BLEND_ONE_MINUS_DST_COLOR" value="3"> Each color and alpha channel value of the Destination is subtracted from `1`. **Example:** If your Destination channels are: `r=1`, `g=0.25`, `b=0.1`, `a=1` They will be modified by: `r=1-1`, `g=1-0.25`, `b=1-0.1`, `a=1-1` The final Multiplier value will be: `r=0`, `g=0.75`, `b=0.9`, `a=0` </item> <item key="BLEND_SRC_ALPHA" value="4"> All color and alpha channels will be the same as the Source alpha value. **Example:** If your Source channels are: `r=0.1`, `g=0`, `b=1`, `a=0.5` The final Multiplier value will be: `r=0.5`, `g=0.5`, `b=0.5`, `a=0.5` </item> <item key="BLEND_ONE_MINUS_SRC_ALPHA" value="5"> All color and alpha channels will be set to the Source alpha value subtracted from `1`. **Example:** If your Source channels are: `r=0`, `g=0.23`, `b=1`, `a=0.6` The alpha channel will be modified by `a=1-0.6` The final Multiplier value will be: `r=0.4`, `g=0.4`, `b=0.4`, `a=0.4` </item> <item key="BLEND_DST_ALPHA" value="6"> All color and alpha channels will be set to the the Destination alpha value. **Example:** If your Destination channels are: `r=0.1`, `g=0`, `b=1`, `a=0.5` The final Multiplier value will be: `r=0.5`, `g=0.5`, `b=0.5`, `a=0.5` </item> <item key="BLEND_ONE_MINUS_DST_ALPHA" value="7"> All color and alpha channels will be set to the Destination alpha value subtracted from `1`. **Example:** If your Destination channels are: `r=0`, `g=0.23`, `b=1`, `a=0.6` The alpha channel will be modified by `a=1-0.6` The final Multiplier value will be: `r=0.4`, `g=0.4`, `b=0.4`, `a=0.4` </item> <item key="BLEND_SRC_ALPHA_SATURATE" value="8"> First, the Source alpha is compared against the Destination alpha value subtracted from `1` and the smaller of the two is kept. Then, the Source color channels are multiplied by the value from the first step. The Source alpha channel is multiplied by `1`. **Example:** If your Source channels are: `r=1`, `g=0.25`, `b=0.1`, `a=0.6` and your Destination channels are: `r=0`, `g=1`, `b=0.5`, `a=0.75` The Destination alpha value subtracted from `1` is calculated: `1-0.75` = `0.25` The Source alpha `0.6` is compared to the subtracted Destination alpha `0.25` and the smaller of the two is kept (`0.25`) The color channels of the Source are multiplied by the smaller value: `r=1*0.25`, `g=0.25*0.25`, `b=0.1*0.25` The final Multiplier value will be `r=0.25`, `g=0.0625`, `b=0.025`, `a=0.6` </item> <item key="BLEND_SRC_COLOR" value="9"> The Multiplier will be the same as the Source color and alpha. </item> <item key="BLEND_ONE_MINUS_SRC_COLOR" value="10"> Each color and alpha channel value of the Source is subtracted from `1`. **Example:** If your Source channels are: `r=1`, `g=0.25`, `b=0.1`, `a=1` They will be modified by: `r=1-1`, `g=1-0.25`, `b=1-0.1`, `a=1-1` The final Multiplier value will be: `r=0`, `g=0.75`, `b=0.9`, `a=0` </item> </items> </enum>