TftBmpMemNameRotate()

TftBmpMemNameRotate(sFileName As sStringParameter1, wX_Pos As wTftLibParameter2, wY_Pos As wTftLibParameter3, wAngleDeg As wTftLibParameter4, wBackground As wTftLibParameter5, bTransparent As bTftLibParameter1, wAlphaColor As wTftLibParameter6, bInvert As bTftLibParameter2, bOverlay As bTftLibParameter3), Byte

Loads and renders a BMP file from FLASH memory by name, rotates it counter-clockwise by the specified angle, and applies optional transparency, color inversion, and pixel-overlay effects.

sFileName – BMP filename (max 12 characters plus dot/extension).

wX_Pos – X-coordinate of the rotated image’s lower-left corner.

wY_Pos – Y-coordinate of the rotated image’s lower-left corner.

wAngleDeg – Rotation angle in degrees (CCW).

wBackground – Fill color for the unused areas created by rotation.

bTransparent – Transparency mode:

0 – Normal rendering (no transparency)

1 – Skip pixels matching the alpha-key color

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

bInvert – Color inversion:

0 – Normal colors

1 – Invert colors

bOverlay – Pixel overlay/blending effect:

0 = NONE – Direct overwrite

1 = OR – Lightens overlaps (adds bits)

2 = AND – Keeps intersecting bits

3 = XOR – Highlights differences

4 = NAND – Inverted AND (bright overlap)

5 = NOR – Inverted OR (darker)

6 = XNOR – Keeps matching pixels

7 = ADD – Adds RGB values (bright result)

8 = SUB – Subtracts RGB values (dark result)

9 = AVG – Averages colors (soft blend)

10 = SCR – Screen blend (inverse multiply; bright highlights)

11 = MUL – Multiply blend (darker, Photoshop-style Multiply)

12 = CON – Contrast mix (non-linear enhancement)

Result:

0 – Success

1 – Origin outside the visible area

2 – BMP width or height is zero

3 – File not found

4 – Image was partially clipped outside the visible area

Notes:

Processing order: transparency → inversion → overlay → render.

Transparency mode is slower because every pixel requires inspection.

Overlay modes are slower because each destination pixel must be read and rewritten.

When TftPixelCheck is enabled:

Images entirely off-screen are skipped.

Images partially off-screen are clipped to display boundaries.

Created with the Personal Edition of HelpNDoc: Make Documentation Review a Breeze with HelpNDoc's Advanced Project Analyzer