TftSepiaRect()

TftSepiaRect(wOriginX As wTftLibParameter1, wOriginY As wTftLibParameter2, wAreaWidth As wTftLibParameter3, wAreaHeight As wTftLibParameter4)

Apply a sepia filter to a defined rectangular area of the TFT screen.

wOriginX    = X coordinate of the bottom-left corner of the target area

wOriginY    = Y coordinate of the bottom-left corner of the target area

wAreaWidth  = Width of the rectangular area to process

wAreaHeight = Height of the rectangular area to process

Notes:

The sepia filter is relatively slow, as it requires reading and rewriting each pixel in the target area.

If the global "TftPixelCheck" flag is enabled, boundary checking is performed:

If the area lies completely outside the visible screen, no processing is applied.

If the area is partially outside, it will be clipped to the visible screen boundaries.

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