`rasGetWidthHeight`

Two independent, standalone page-size calculators that

void __stdcall rasCalcPagePixelSize(IPGE PagePtr, TPDFPageScale DefScale, float Scale, uint32_t FrameWidth, uint32_t FrameHeight, TRasterFlags Flags, uint32_t* Width, uint32_t* Height);
BOOL32 __stdcall rasGetWidthHeight(IPGE PagePtr, TRasterFlags Flags, float* Width, float* Height, int32_t Rotate, void** BBox);

Delphi

procedure rasCalcPagePixelSize(PagePtr: IPGE; DefScale: TPDFPageScale; Scale: Single; FrameWidth, FrameHeight: Cardinal; Flags: TRasterFlags; var Width, Height: Cardinal); stdcall;
function rasGetWidthHeight(PagePtr: IPGE; Flags: TRasterFlags; var Width, Height: Single; Rotate: Integer; BBox: PPointer): LongBool; stdcall;

Purpose. Two independent, standalone page-size calculators that don't require a page cache at all — both take a raw IPGE page pointer.

Description. rasCalcPagePixelSize computes pixel dimensions for a given fit mode: psFitWidth/psFitHeight scale to the supplied FrameWidth/FrameHeight; psFitBest picks the smaller of the two resulting scales (true "fit within frame"); anything else (psFitZoom) honors the explicit Scale parameter directly. rasGetWidthHeight instead reports the page's own natural size, rotated by the effective rotation (Rotate if >= 0, else the page's own stored rotation, with Flags' rfRotate90/180/270 bits additively applied on top, normalized mod 360) — swapping Width/Height for a 90°/270° effective rotation. BBox is accepted by rasGetWidthHeight's ABI but never read — there is no box-selection (media/crop/trim/bleed/ art) here, unlike the document-level pdfGetBBox/pdfSetBBox family (Page Lifecycle and Geometry) which genuinely honors a Boundary parameter.

Parameters.

Parameter	Description
`PagePtr`	Raw page pointer (not a cache/document handle).
`DefScale`	(CalcPagePixelSize) Fit mode; `psFitZoom` uses `Scale` directly.
`Scale`	(CalcPagePixelSize) Explicit scale, used only for `psFitZoom` (or as a starting default `1` if `≤ 0`).
`FrameWidth`, `FrameHeight`	(CalcPagePixelSize) Target frame for fit modes.
`Flags`	(WidthHeight) Additive rotation bits on top of `Rotate`/the page's own rotation.
`Rotate`	(WidthHeight) `≥ 0` overrides the page's own stored rotation.
`BBox`	(WidthHeight) Accepted but never read — always reports the page's own default box, no boundary selection.
`Width`, `Height`	Output pixel/point dimensions.

Return value. rasCalcPagePixelSize: none (procedure). rasGetWidthHeight: True if PagePtr resolves to a valid, positive-size page; False otherwise.

C# (P/Invoke)

wrappers/dotnet/LumasPdf.cs

[return: MarshalAs(UnmanagedType.Bool)]

Area

Rendering & Viewer