Image to Image / Node.js Reference

class ImageToImageClient

All setter methods return ImageToImageClient object unless specified otherwise.

Constructor

function ImageToImageClient(userName, apiKey)

Constructor for the PDFCrowd API client.

Parameters:
  • userName - Your username at PDFCrowd.
  • apiKey - Your API key.

Conversion Input

function convertUrl(url, callbacks)

Convert an image.

Parameters:
  • url - The address of the image to convert.
    Constraint:
    • Supported protocols are http:// and https://.
  • callbacks - The object that defines the following functions:
    • data(readStream) - called when the output data can be read from readStream
    • error(message, statusCode) - called when an error occurs
    • end() - called when the conversion finishes
    The client library provides 2 helper functions that can be used here:
    • saveToFile(filePath[, callback]) - saves the output data to a file
      • filePath - the output file path
      • callback(err, filePath) - called when the conversion finishes
    • sendImageInHttpResponse(response, contentType, fileName[, disposition]) - sends the generated image in an HTTP response
      • response - the response object
      • contentType - the response content type
      • fileName - the desired file name
      • disposition - the response content disposition, can be "attachment" or "inline", the default is "attachment".

function convertUrlToFile(url, filePath, callback)

Convert an image and write the result to a local file.

Parameters:
  • url - The address of the image to convert.
    Constraint:
    • Supported protocols are http:// and https://.
  • filePath - The output file path.
  • callback - The callback(error, filePath) function is called when the conversion finishes. The error object is present if an error occurred, filePath is the output file path.

function convertFile(file, callbacks)

Convert a local file.

Parameters:
  • file - The path to a local file to convert.
    Constraint:
    • The file must exist and not be empty.
  • callbacks - The object that defines the following functions:
    • data(readStream) - called when the output data can be read from readStream
    • error(message, statusCode) - called when an error occurs
    • end() - called when the conversion finishes
    The client library provides 2 helper functions that can be used here:
    • saveToFile(filePath[, callback]) - saves the output data to a file
      • filePath - the output file path
      • callback(err, filePath) - called when the conversion finishes
    • sendImageInHttpResponse(response, contentType, fileName[, disposition]) - sends the generated image in an HTTP response
      • response - the response object
      • contentType - the response content type
      • fileName - the desired file name
      • disposition - the response content disposition, can be "attachment" or "inline", the default is "attachment".

function convertFileToFile(file, filePath, callback)

Convert a local file and write the result to a local file.

Parameters:
  • file - The path to a local file to convert.
    Constraint:
    • The file must exist and not be empty.
  • filePath - The output file path.
  • callback - The callback(error, filePath) function is called when the conversion finishes. The error object is present if an error occurred, filePath is the output file path.

function convertRawData(data, callbacks)

Convert raw data.

Parameters:
  • data (byte[]) - The raw content to be converted.
  • callbacks - The object that defines the following functions:
    • data(readStream) - called when the output data can be read from readStream
    • error(message, statusCode) - called when an error occurs
    • end() - called when the conversion finishes
    The client library provides 2 helper functions that can be used here:
    • saveToFile(filePath[, callback]) - saves the output data to a file
      • filePath - the output file path
      • callback(err, filePath) - called when the conversion finishes
    • sendImageInHttpResponse(response, contentType, fileName[, disposition]) - sends the generated image in an HTTP response
      • response - the response object
      • contentType - the response content type
      • fileName - the desired file name
      • disposition - the response content disposition, can be "attachment" or "inline", the default is "attachment".

function convertRawDataToFile(data, filePath, callback)

Convert raw data to a file.

Parameters:
  • data (byte[]) - The raw content to be converted.
  • filePath - The output file path.
  • callback - The callback(error, filePath) function is called when the conversion finishes. The error object is present if an error occurred, filePath is the output file path.

function convertStream(inStream, callbacks)

Convert the contents of an input stream.

Parameters:
  • inStream (InputStream) - The input stream with source data.
  • callbacks - The object that defines the following functions:
    • data(readStream) - called when the output data can be read from readStream
    • error(message, statusCode) - called when an error occurs
    • end() - called when the conversion finishes
    The client library provides 2 helper functions that can be used here:
    • saveToFile(filePath[, callback]) - saves the output data to a file
      • filePath - the output file path
      • callback(err, filePath) - called when the conversion finishes
    • sendImageInHttpResponse(response, contentType, fileName[, disposition]) - sends the generated image in an HTTP response
      • response - the response object
      • contentType - the response content type
      • fileName - the desired file name
      • disposition - the response content disposition, can be "attachment" or "inline", the default is "attachment".

function convertStreamToFile(inStream, filePath, callback)

Convert the contents of an input stream and write the result to a local file.

Parameters:
  • inStream (InputStream) - The input stream with source data.
  • filePath - The output file path.
  • callback - The callback(error, filePath) function is called when the conversion finishes. The error object is present if an error occurred, filePath is the output file path.

Conversion Format

function setOutputFormat(outputFormat)

The format of the output file.

Parameter:
  • outputFormat
    Allowed Values:
    • png
    • jpg
    • gif
    • tiff
    • bmp
    • ico
    • ppm
    • pgm
    • pbm
    • pnm
    • psb
    • pct
    • ras
    • tga
    • sgi
    • sun
    • webp
    Default:
    png

Image Operations

Settings used for operations with images.

function setResize(resize)

Resize the image.

Parameter:
  • resize - The resize percentage or new image dimensions.
    Default:
    100%
Examples:
  • Enlarge for high-res display: setResize("200%")
  • Standard XGA screen resolution: setResize("1024x768")

function setRotate(rotate)

Rotate the image.

Parameter:
  • rotate - The rotation specified in degrees.

function setCropAreaX(x)

Set the top left X coordinate of the content area. It is relative to the top left X coordinate of the print area.

Parameter:
  • x
    Constraint:
    • The value must be specified in inches 'in', millimeters 'mm', centimeters 'cm', pixels 'px', or points 'pt'.
    Default:
    0px
Examples:
  • Crop extends beyond left edge: setCropAreaX("-1in")
  • Skip narrow border area: setCropAreaX("10mm")

function setCropAreaY(y)

Set the top left Y coordinate of the content area. It is relative to the top left Y coordinate of the print area.

Parameter:
  • y
    Constraint:
    • The value must be specified in inches 'in', millimeters 'mm', centimeters 'cm', pixels 'px', or points 'pt'.
    Default:
    0px
Examples:
  • Crop extends beyond left edge: setCropAreaY("-1in")
  • Skip narrow border area: setCropAreaY("10mm")

function setCropAreaWidth(width)

Set the width of the content area. It should be at least 1 inch.

Parameter:
  • width
    Constraint:
    • The value must be specified in inches 'in', millimeters 'mm', centimeters 'cm', pixels 'px', or points 'pt'.
    Default:
    The width of the print area.
Examples:
  • Standard document crop width: setCropAreaWidth("8in")
  • Full A4 page width crop: setCropAreaWidth("210mm")

function setCropAreaHeight(height)

Set the height of the content area. It should be at least 1 inch.

Parameter:
  • height
    Constraint:
    • The value must be specified in inches 'in', millimeters 'mm', centimeters 'cm', pixels 'px', or points 'pt'.
    Default:
    The height of the print area.
Examples:
  • Standard document crop width: setCropAreaHeight("8in")
  • Full A4 page width crop: setCropAreaHeight("210mm")

function setCropArea(x, y, width, height)

Set the content area position and size. The content area enables to specify the part to be converted.

Parameters:
  • x - Set the top left X coordinate of the content area. It is relative to the top left X coordinate of the print area.
    Constraint:
    • The value must be specified in inches 'in', millimeters 'mm', centimeters 'cm', pixels 'px', or points 'pt'.
    Default:
    0px
  • y - Set the top left Y coordinate of the content area. It is relative to the top left Y coordinate of the print area.
    Constraint:
    • The value must be specified in inches 'in', millimeters 'mm', centimeters 'cm', pixels 'px', or points 'pt'.
    Default:
    0px
  • width - Set the width of the content area. It should be at least 1 inch.
    Constraint:
    • The value must be specified in inches 'in', millimeters 'mm', centimeters 'cm', pixels 'px', or points 'pt'.
    Default:
    The width of the print area.
  • height - Set the height of the content area. It should be at least 1 inch.
    Constraint:
    • The value must be specified in inches 'in', millimeters 'mm', centimeters 'cm', pixels 'px', or points 'pt'.
    Default:
    The height of the print area.

function setRemoveBorders(value)

Remove borders of an image which does not change in color.

Parameter:
  • value (bool) - Set to true to remove borders.
    Default:
    false

Canvas Setup

function setCanvasSize(size)

Set the output canvas size.

Parameter:
  • size
    Allowed Values:
    • A0
    • A1
    • A2
    • A3
    • A4
    • A5
    • A6
    • Letter

function setCanvasWidth(width)

Set the output canvas width.

Parameter:
  • width
    Constraint:
    • The value must be specified in inches 'in', millimeters 'mm', centimeters 'cm', pixels 'px', or points 'pt'.
Examples:
  • A4 landscape / banner width: setCanvasWidth("297mm")
  • US Letter standard width: setCanvasWidth("8.5in")

function setCanvasHeight(height)

Set the output canvas height.

Parameter:
  • height
    Constraint:
    • The value must be specified in inches 'in', millimeters 'mm', centimeters 'cm', pixels 'px', or points 'pt'.
Examples:
  • Large poster canvas height: setCanvasHeight("420mm")
  • US Letter standard height: setCanvasHeight("11in")

function setCanvasDimensions(width, height)

Set the output canvas dimensions. If no canvas size is specified, margins are applied as a border around the image.

Parameters:
  • width - Set the output canvas width.
    Constraint:
    • The value must be specified in inches 'in', millimeters 'mm', centimeters 'cm', pixels 'px', or points 'pt'.
  • height - Set the output canvas height.
    Constraint:
    • The value must be specified in inches 'in', millimeters 'mm', centimeters 'cm', pixels 'px', or points 'pt'.
Examples:
  • A4 portrait dimensions: setCanvasDimensions("210mm", "297mm")
  • US Letter dimensions: setCanvasDimensions("8.5in", "11in")
  • A3 portrait dimensions: setCanvasDimensions("297mm", "420mm")

function setOrientation(orientation)

Set the output canvas orientation.

Parameter:
  • orientation
    Allowed Values:
    • landscape
    • portrait
    Default:
    portrait

function setPosition(position)

Set the image position on the canvas.

Parameter:
  • position
    Allowed Values:
    • center
    • top
    • bottom
    • left
    • right
    • top-left
    • top-right
    • bottom-left
    • bottom-right
    Default:
    center

function setPrintCanvasMode(mode)

Set the mode to print the image on the canvas.

Parameter:
  • mode
    Allowed Values:
    • default — No image scaling.
    • fit — Fit the image to the canvas with aspect ratio.
    • stretch — Stretch the image to the canvas with no aspect ratio.
    Default:
    default

function setMarginTop(top)

Set the output canvas top margin.

Parameter:
  • top
    Constraint:
    • The value must be specified in inches 'in', millimeters 'mm', centimeters 'cm', pixels 'px', or points 'pt'.
Examples:
  • Wide margin for framing: setMarginTop("1in")
  • Minimal margin for web images: setMarginTop("10mm")

function setMarginRight(right)

Set the output canvas right margin.

Parameter:
  • right
    Constraint:
    • The value must be specified in inches 'in', millimeters 'mm', centimeters 'cm', pixels 'px', or points 'pt'.
Examples:
  • Wide margin for framing: setMarginRight("1in")
  • Minimal margin for web images: setMarginRight("10mm")

function setMarginBottom(bottom)

Set the output canvas bottom margin.

Parameter:
  • bottom
    Constraint:
    • The value must be specified in inches 'in', millimeters 'mm', centimeters 'cm', pixels 'px', or points 'pt'.
Examples:
  • Wide margin for framing: setMarginBottom("1in")
  • Minimal margin for web images: setMarginBottom("10mm")

function setMarginLeft(left)

Set the output canvas left margin.

Parameter:
  • left
    Constraint:
    • The value must be specified in inches 'in', millimeters 'mm', centimeters 'cm', pixels 'px', or points 'pt'.
Examples:
  • Wide margin for framing: setMarginLeft("1in")
  • Minimal margin for web images: setMarginLeft("10mm")

function setMargins(top, right, bottom, left)

Set the output canvas margins.

Parameters:
  • top - Set the output canvas top margin.
    Constraint:
    • The value must be specified in inches 'in', millimeters 'mm', centimeters 'cm', pixels 'px', or points 'pt'.
  • right - Set the output canvas right margin.
    Constraint:
    • The value must be specified in inches 'in', millimeters 'mm', centimeters 'cm', pixels 'px', or points 'pt'.
  • bottom - Set the output canvas bottom margin.
    Constraint:
    • The value must be specified in inches 'in', millimeters 'mm', centimeters 'cm', pixels 'px', or points 'pt'.
  • left - Set the output canvas left margin.
    Constraint:
    • The value must be specified in inches 'in', millimeters 'mm', centimeters 'cm', pixels 'px', or points 'pt'.

function setCanvasBackgroundColor(color)

The canvas background color in RGB or RGBA hexadecimal format. The color fills the entire canvas regardless of margins. If no canvas size is specified and the image format supports background (e.g. PDF, PNG), the background color is applied too.

Parameter:
  • color
    Constraint:
    • The value must be in RRGGBB or RRGGBBAA hexadecimal format.
Examples:
  • red color: setCanvasBackgroundColor("FF0000")
  • green color: setCanvasBackgroundColor("00ff00")
  • green color with 50% opacity: setCanvasBackgroundColor("00ff0080")

function setDpi(dpi)

Set the DPI resolution of the input image. The DPI affects margin options specified in points too (e.g. 1 point is equal to 1 pixel in 96 DPI).

Parameter:
  • dpi (int) - The DPI value.
    Default:
    96
Example:
  • The DPI used for printers. 1 inch contains 300 points: setDpi(300)

Miscellaneous

function setDebugLog(value)

Turn on the debug logging. Details about the conversion are stored in the debug log. The URL of the log can be obtained from the getDebugLogUrl method or available in conversion statistics.

Parameter:
  • value (bool) - Set to true to enable the debug logging.
    Default:
    false

function getDebugLogUrl() { return string; }

Get the URL of the debug log for the last conversion.

Returns:
string - The link to the debug log.

function getRemainingCreditCount() { return int; }

Get the number of conversion credits available in your account.
This method can only be called after a call to one of the convertXtoY methods.
The returned value can differ from the actual count if you run parallel conversions.
The special value 999999 is returned if the information is not available.

Returns:
int - The number of credits.

function getConsumedCreditCount() { return int; }

Get the number of credits consumed by the last conversion.

Returns:
int - The number of credits.

function getJobId() { return string; }

Get the job id.

Returns:
string - The unique job identifier.

function getOutputSize() { return int; }

Get the size of the output in bytes.

Returns:
int - The count of bytes.

function getVersion() { return string; }

Get the version details.

Returns:
string - API version, converter version, and client version.

function setTag(tag)

Tag the conversion with a custom value. The tag is used in conversion statistics. A value longer than 32 characters is cut off.

Parameter:
  • tag - A string with the custom tag.
Example:
  • Track job in analytics: setTag("client-1234")

function setHttpProxy(proxy)

A proxy server used by the conversion process for accessing the source URLs with HTTP scheme. It can help to circumvent regional restrictions or provide limited access to your intranet.

Parameter:
  • proxy
    Constraint:
    • The value must have format DOMAIN_OR_IP_ADDRESS:PORT.
Examples:
  • Corporate proxy server: setHttpProxy("myproxy.com:8080")
  • Direct IP proxy connection: setHttpProxy("113.25.84.10:33333")

function setHttpsProxy(proxy)

A proxy server used by the conversion process for accessing the source URLs with HTTPS scheme. It can help to circumvent regional restrictions or provide limited access to your intranet.

Parameter:
  • proxy
    Constraint:
    • The value must have format DOMAIN_OR_IP_ADDRESS:PORT.
Examples:
  • Secure proxy for HTTPS: setHttpsProxy("myproxy.com:443")
  • Direct secure proxy IP: setHttpsProxy("113.25.84.10:44333")

API Client Options

function setConverterVersion(version)

Set the converter version. Different versions may produce different output. Choose which one provides the best output for your case.

Availability:
API client >= 5.0.0. See versioning.
Parameter:
  • version - The version identifier.
    Allowed Values:
    • 24.04 — Version 24.04.
    • 20.10 — Version 20.10.
    • 18.10 — Version 18.10.
    • latest — Version 20.10 is used.
    Default:
    24.04

function setUseHttp(value)

Specify whether to use HTTP or HTTPS when connecting to the PDFCrowd API.

Parameter:
  • value (bool) - Set to true to use HTTP.
    Default:
    false

function setClientUserAgent(agent)

Specifies the User-Agent HTTP header that the client library will use when interacting with the API.

Availability:
API client >= 6.4.0 See versioning.
Parameter:
  • agent - The user agent string.

function setUserAgent(agent)

Deprecated Replaced with: setClientUserAgent

Set a custom user agent HTTP header. It can be useful if you are behind a proxy or a firewall.

Parameter:
  • agent - The user agent string.
    Default:
    pdfcrowd_nodejs_client/6.5.2 (https://pdfcrowd.com)

function setProxy(host, port, userName, password)

Specifies an HTTP proxy that the API client library will use to connect to the internet.

Parameters:
  • host - The proxy hostname.
  • port (int) - The proxy port.
  • userName - The username.
  • password - The password.

function setRetryCount(count)

Specifies the number of automatic retries when the 502 or 503 HTTP status code is received. The status code indicates a temporary network issue. This feature can be disabled by setting to 0.

Parameter:
  • count (int) - Number of retries.
    Default:
    1
Example:
  • Retry failed requests three times: setRetryCount(3)