SptBlurVertical()

SptBlurVertical(bBuffer As bTftLibParameter1, bStrength As bTftLibParameter2, bTransparent As bTftLibParameter3, wAlphaColor As wTftLibParameter1), Byte

Applies a vertical blur effect to a sprite buffer, with optional transparency support.

bBuffer – Working sprite buffer to be processed.

bStrength – Number of internal blur passes; higher values increase blur intensity.

bTransparent – Transparency mode:

0 – Apply blur to all pixels

1 – Skip pixels matching the alpha-key color

wAlphaColor – Alpha-key color used when transparency is enabled.

Result:

0 – Success

1 – Invalid source buffer

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