SptMergeFull() | TFT & EPD Graphic Library 2

Syntax

SptMergeFull(bBufferS As bTftLibParameter1, bTransparent As bTftLibParameter2, wAlphaColor As wTftLibParameter1, bOverlay As bTftLibParameter3, bBufferD As bTftLibParameter4), Byte

Overview

Merges two buffers by overlaying the source buffer onto the destination buffer. Optional transparency and pixel blending modes can be applied.
The source and destination buffers must have identical dimensions.

Parameters

Parameter	Description
bBufferS	Source buffer
bTransparent	Transparency mode: 0 = Normal rendering (no transparency) 1 = Transparent rendering (skip pixels matching wAlphaColor)
wAlphaColor	Alpha color value used when transparency is enabled
bOverlay	Pixel overlay / blending mode: 0 = NONE - No overlay; direct pixel replacement 1 = OR - Bitwise OR; lightens overlapping areas 2 = AND - Bitwise AND; intersection-style effect 3 = XOR - Bitwise XOR; highlights differences 4 = NAND - Inverted AND; brightens overlap regions 5 = NOR - Inverted OR; darkens combined areas 6 = XNOR - Inverted XOR; strong masking effect 7 = ADD - Color addition; brightens overlaps 8 = SUB - Color subtraction; darkens overlaps 9 = AVG - Color averaging; soft blending effect 10 = SCR - Screen blend; brightens highlights 11 = MUL - Multiply blend; darkens overlaps 12 = CON - Contrast blend; non-linear midtone enhancement
bBufferD	Destination buffer

Returns:

0 = Success

1 = Invalid source buffer

2 = Invalid destination buffer

3 = Destination buffer size differs from source

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