SptMergeRect()

SptMergeRect(bBufferS As bTftLibParameter1, wOriginX As wTftLibParameter1, wOriginY As wTftLibParameter2, wWidth As wTftLibParameter3, wHeight As wTftLibParameter4, bBufferD As bTftLibParameter2, wDestOrgX As wTftLibParameter5, wDestOrgY As wTftLibParameter6, bTransparent As bTftLibParameter3, wAlphaColor As wTftLibParameter7), Byte

Copies a rectangular region from the source buffer and blends/overlays it onto a specified location in the destination buffer, with optional transparency.

bBufferS = Source buffer

wOriginX = X coordinate of the bottom-left corner of the source region

wOriginY = Y coordinate of the bottom-left corner of the source region

wWidth = Width of the region to copy

wHeight = Height of the region to copy

bBufferD = Destination buffer

wDestOrgX = X coordinate of the bottom-left corner in the destination buffer

wDestOrgY = Y coordinate of the bottom-left corner in the destination buffer

bTransparent = Transparency mode:

0 = Normal copy (no transparency)

1 = Transparent copy (skip pixels matching the alpha color)

wAlphaColor  = Color value treated as transparent when transparency is enabled

Return:

0 = Success

1 = Invalid source buffer

2 = Invalid destination buffer

3 = Destination area too small

4 = Source selection exceeds buffer bounds

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