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GMImage.WriteToFile

Write single image frame to a file.

Component Version macOS Windows Linux Server FileMaker iOS SDK
GraphicsMagick 2.0 Yes Yes Yes Yes Yes
MBS( "GMImage.WriteToFile"; ImageRef; Path )   More

Parameters

Parameter Description Example
ImageRef The image reference number. 1
Path A platform specific filepath where to write the image. "C:\Test.jpg"

Result

Returns "OK" on success.

Description

Write single image frame to a file.
See also GMImage.WriteToPNGContainer, GMImage.WriteToBMPContainer, GMImage.WriteToTiffContainer, GMImage.WriteToJPEGContainer and GMImage.WriteToGIFContainer.

This function requires a native path. Use Path.FileMakerPathToNativePath to convert a FileMaker path to a native path if required. If you like to have the user choose the path, you can use FileDialog functions.
For Server be aware that server has limited permissions and may not be able to access all files on a computer.

Examples

Save file to Bob's desktop as GIF file on macOS:

MBS( "GMImage.WriteToFile"; $BigImageRef; "/Users/Bob/Desktop/test.gif" )

Save file to Bob's desktop as JPG file on Windows:

MBS( "GMImage.WriteToFile"; $BigImageRef; "C:\Data\logo.jpg" )

Convert image to 1 bit TIFF:

# Load from container
$Image = MBS("GMImage.NewFromContainer"; GraphicsMagick::image);

# make black and white with threshold
$Result = MBS("GMImage.Threshold";$Image; 127);

# mark as monochrome image
$Result = MBS("GMImage.SetMonochrome";$Image; 1);

# set type to 1 for black/white
$Result = MBS("GMImage.SetType";$Image; 1);

# set to use TIFF for compression
$Result = MBS("GMImage.SetMagick";$Image; "TIFF");

# set to use CCITT 4 Fax compression
$Result = MBS("GMImage.SetCompressType";$Image; 4);

# and write to a file
$Result = MBS("GMImage.WriteToFile"; $Image; "/tmp/test.tif");

# cleanup
$Error = MBS("GMImage.Release";$Image)

Loads from file and writes to other file:

Set Variable [$img; Value:MBS("GMImage.NewImagesFromFile"; "/Users/cs/Desktop/test.jpg")]
If [MBS("IsError") = 0]
    Set Variable [$r; Value:MBS( "GMImage.WriteToFile"; $img; "/Users/cs/Desktop/test.tif" )]
    Set Variable [$r; Value:MBS( "GMImage.Release"; $img)]
End If

Draw something and write to file on desktop:

# New Image
Set Variable [$img; Value:MBS("GMImage.New"; "300x200"; "RGB 1 1 1")]
# Set colors and line width
Set Variable [$r; Value:MBS("GMImage.SetStrokeColor"; $img; "RGB 1 0 0")]
Set Variable [$r; Value:MBS("GMImage.SetFillColor"; $img; "RGB 0 0 1")]
Set Variable [$r; Value:MBS("GMImage.SetLineWidth"; $img; 5)]
# draw a rectangle
Set Variable [$r; Value:MBS("GMImage.DrawRectangle"; $img; 50; 50; 250; 150)]
# save to test.png on desktop:
Set Variable [$DesktopPath; Value:MBS( "Folders.UserDesktop" )]
Set Variable [$path; Value:MBS( "Path.AddPathComponent"; $DesktopPath; "test.png")]
Set Variable [$r; Value:MBS("GMImage.WriteToFile"; $img; $path)]
# cleanup
Set Variable [$r; Value:MBS("GMImage.Release"; $img)]

See also

Example Databases

Blog Entries

FileMaker Magazin

Created 18th August 2014, last changed 10th August 2020


GMImage.WriteToContainer   -   GMImage.WriteToGIFContainer

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