rasSetRotate

int32_t __stdcall rasGetRotate(IPGC CachePtr);
void __stdcall rasSetRotate(IPGC CachePtr, int32_t Value);

function rasGetRotate(CachePtr: IPGC): Integer; stdcall;
procedure rasSetRotate(CachePtr: IPGC; Value: Integer); stdcall;

Purpose. Get/set the cache's view rotation (on top of, not replacing, each page's own stored /Rotate).

Description. rasSetRotate normalizes Value into 0..359 via mod 360 (with a correction for negative results), and clears the render cache (a rotation change invalidates cached bitmaps, same as a zoom change). This is the view-wide rotation consumed by rasClientToPage's inverse-rotation hit-test math (below) and by the buffer-level RotateRGB used in the actual paint path (Rendering, Painting, and the Tile Pipeline).

Parameters.

Return value. rasGetRotate: current rotation (0 if CachePtr doesn't resolve).

C# (P/Invoke)

public static extern void rasSetRotate(IntPtr CachePtr, int Value);