SptReadTft() | TFT & EPD Graphic Library 2

Syntax

SptReadTft(wOrgX As wTftLibParameter1, wOrgY As wTftLibParameter2, wWidth As wTftLibParameter3, wHeight As wTftLibParameter4, bBuffer As bTftLibParameter1, bTransparent As bTftLibParameter2, wAlphaColor As wTftLibParameter5, bOverlay As bTftLibParameter3), Byte

Overview

Transfers a rectangular area from the TFT screen into a sprite buffer. Optional transparency and pixel overlay modes may be applied during the transfer.

Parameters

Parameter	Description
wOrgX	X-coordinate of the bottom-left corner of the screen area to read
wOrgY	Y-coordinate of the bottom-left corner of the screen area to read
wWidth	Width of the area to transfer, in pixels
wHeight	Height of the area to transfer, in pixels
bBuffer	Destination sprite buffer
bTransparent	Transparency mode: 0 = Normal transfer (no transparency) 1 = Transparent transfer (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 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

X coordinates increase from left to right
Y coordinates increase from bottom to top

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