SptCopyRow() | TFT & EPD Graphic Library 2

Syntax

SptCopyRow(bBufferS As bTftLibParameter1, wRowS As wTftLibParameter1, bBufferD As bTftLibParameter2, wRowD As wTftLibParameter2, bTransparent As bTftLibParameter3, wAlphaColor As wTftLibParameter3, bOverlay As bTftLibParameter4), Byte

Overview

Copies a single row from a source buffer to a specified row in a destination buffer, with optional transparency and pixel-overlay effects applied.

Parameters

Parameter	Description
bBufferS	Source buffer.
wRowS	Source row index (0-based).
bBufferD	Destination buffer.
wRowD	Destination row index (0-based).
bTransparent	Transparency mode: 0 – Normal copy (no transparency) 1 – Skip pixels matching the alpha-key color
wAlphaColor	Alpha-key color used when transparency is enabled.
bOverlay	Pixel overlay/blending mode: 0 = NONE – Direct overwrite 1 = OR – Lightens overlaps 2 = AND – Keeps intersecting bits 3 = XOR – Highlights differences 4 = NAND – Inverted AND; bright overlaps 5 = NOR – Inverted OR; darker result 6 = XNOR – Keeps matching pixels 7 = ADD – Adds color values; bright blend 8 = SUB – Subtracts color values; dark blend 9 = AVG – Averages colors; soft blend 10 = SCR – Screen blend; bright highlights 11 = MUL – Multiply blend; darker result 12 = CON – Contrast-enhancing non-linear mix

Return value

Value	Meaning
0	Success
1	Invalid source buffer
2	Invalid destination buffer
3	Source and destination buffer widths differ
4	Source row index exceeds buffer height
5	Destination row index exceeds buffer height

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