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Bitmap dimensions and format

Source: R/api_completion.R
pdf_bitmap_info.Rd

Wraps FPDFBitmap_GetWidth, _GetHeight, _GetStride, and _GetFormat. Returns a list with the bitmap's pixel layout (width × height) plus stride in bytes and the PDFium format code.

Usage

pdf_bitmap_info(bitmap)

Arguments

bitmap

A pdfium_image_buffer.

Value

Named list — width, height, stride, format.

Details

Format codes (from fpdfview.h's FPDFBitmap_* macros):

  • 1 = Gray (1 byte/pixel)

  • 2 = BGR (3 bytes/pixel)

  • 3 = BGRx (4 bytes/pixel, 4th byte unused)

  • 4 = BGRA (4 bytes/pixel with alpha)