SptRotateRectTft()

SptRotateRectTft(bBufferS As bTftLibParameter1, wAngleDeg As wTftLibParameter1, wBackGround As wTftLibParameter2, wOrgX As wTftLibParameter3, wOrgY As wTftLibParameter4, bTransparent As bTftLibParameter2, wAlphaColor As wTftLibParameter5), Byte

Rotates a sprite counter-clockwise by an integer angle and draws it on the display.

bBufferS – Source sprite buffer.

wAngleDeg – Rotation angle in degrees.

wBackGround – Fill color for exposed pixels at the corners.

wOrgX – X-coordinate of the bottom-left corner where the sprite will be drawn.

wOrgY – Y-coordinate of the bottom-left corner where the sprite will be drawn.

bTransparent – Transparency mode:

0 = normal (no transparency)

1 = transparent (skip pixels that match the alpha color)

wAlphaColor – Alpha-match color used when transparency is enabled.

Return:

0 – Success.

1 – Invalid source buffer.

2 – Output exceeds screen boundaries.

Notes:

The rotated bounding-box size in pixels is calculated as:

NewWidth = CEILING(|OrigWidth·cos(angle)| + |OrigHeight·sin(angle)|)

NewHeight = CEILING(|OrigWidth·sin(angle)| + |OrigHeight·cos(angle)|)

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