SptWriteTft() | TFT & EPD Graphic Library 2

Syntax

SptWriteTft(wOrgX As wTftLibParameter1, wOrgY As wTftLibParameter2, bBuffer As bTftLibParameter1, bTransparent As bTftLibParameter2, wAlphaColor As wTftLibParameter3, bInvert As bTftLibParameter3, bOverlay As bTftLibParameter4)

Overview

Transfers an entire sprite buffer to the TFT screen. The buffer’s width and height metadata define the transfer area.

Parameters

Parameter	Description
wOrgX	X-coordinate of the bottom-left corner of the screen destination
wOrgY	Y-coordinate of the bottom-left corner of the screen destination
bBuffer	Sprite buffer to be written to the screen
bTransparent	Transparency mode: 0 = Normal rendering (no transparency) 1 = Transparent rendering (skip pixels matching wAlphaColor)
wAlphaColor	Alpha color value used when transparency is enabled
bInvert	Color inversion mode: 0 = Normal colors 1 = Inverted colors
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 zones 5 = NOR - Inverted OR; creates darker overlays 6 = XNOR - Inverted XOR; strong masking effect 7 = ADD - Color addition; brightens overlapping regions 8 = SUB - Color subtraction; darkens overlapping regions 9 = AVG - Color averaging; soft blending effect 10 = SCR - Screen blend; brightens highlights 11 = MUL - Multiply blend; darkens overlapping areas 12 = CON - Contrast blend; non-linear midtone enhancement

Notes

Effect order: transparency check → color inversion → overlay → pixel write
Transparent rendering is slower, as pixels are processed individually rather than in block mode
Overlay modes are slower, since each destination pixel must be read and written
If the global "TftPixelCheck" flag is enabled:

Sprites completely outside the visible area are not drawn
Sprites partially outside the visible area are clipped to the screen boundaries

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