print-checker

Library to check and analyze images for printing. It validates the size, color mode and the resolution of media files.

Example

const requirement: PrintCheckerRequirement = {
      colorMode: "CMYK",
      height: 154, // unit: mm
      width: 111, // unit: mm
      dpi: 300,
  };

try {
  await checkImage("./example.jpg", requirement);
} catch(e) {
  if(e instanceof WrongHeightException) {
    ...
  }
}

path is the path of the image, requirements is the config with the requirements of image.

If the promise resolves, it responses true. Otherwise the promise will be rejected with an error.

Exception-Handling

PRINT_CHECKER_MISSING_META_DATA is thrown, if some data is missing.

PRINT_CHECKER_WRONG_HEIGHT is thrown, if the image or document height is not equal to the requirements.

PRINT_CHECKER_WRONG_WIDTH is thrown, if the image or document width is not equal to the requirements.

PRINT_CHECKER_WRONG_DPI is thrown, if the image resolution not equal to the requirements (image only).

PRINT_CHECKER_WRONG_COLOR_MODE is thrown, if the image or document color mode (RGB or CMYK) is not equal to the requirements.

Dependencies

• sharp (Lib to analyze images)

Roadmap

• Solution to validate pdf documents

Author

Manuel Dierkes (m.dierkes@ultra-sites.de)