THotPDF.SetLoadedPageThumbnailStream Method
Replaces a page thumbnail from caller-owned bytes and writes validated image dimensions, bit depth, color space, and optional filter metadata
Declaration
function SetLoadedPageThumbnailStream(PageIndex: Integer;
Source: TStream; Width, Height, BitsPerComponent: Integer;
const ColorSpace, Filter: AnsiString;
AutoGenerated: boolean = False): boolean;
Automatic thumbnails are marked so cache invalidation and diagnostics can distinguish generated content