EPS libraries for C/C++

• Ghostscript renders EPS to PNG or PDF cropped to the bounding box (-dEPSCrop), computes the real bounding box with the bbox device and converts PDF or PostScript pages to EPS with eps2write. AGPL-3.0 or commercial.
• libspectre reads DSC metadata (is it EPS, bounding box size, creator) and renders the graphic into an RGB buffer through Ghostscript. GPL-2.0.
• cairo writes EPS from vector drawing calls; the bounding box is computed from what you draw. LGPL-2.1 or MPL-1.1.

Pick Ghostscript for conversion jobs, libspectre for a viewer or thumbnailer, cairo to produce EPS.

• cairo cairo is a 2D graphics library for C that writes Encapsulated PostScript. How to create an EPS file with a tight bounding box, add text and shapes.
• Ghostscript Use the Ghostscript C API to render EPS to PNG, convert EPS to PDF cropped to the bounding box, compute the real bounding box.
• libspectre libspectre is a C library over Ghostscript for PostScript and EPS viewers. How to detect an EPS file, read its size and metadata.