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Help / WLanguage / WLanguage functions / Controls, pages and windows / Drawing functions
  • Image found in a Web Camera control
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Stored procedures
Saves an image:
  • in a JPEG file.
  • in memory.
This image corresponds to the image found:
  • in an Image control.
  • in a variable of type Image.
  • in a Bar Code control.
    Linux The Bar Code controls are not available in this version. Therefore, no image found in a Bar Code control can be saved.
  • in a Web Camera control.
Remarks:
  • Only the visible part of the Image control is saved.
  • This function can only be used to save the images for screen resolutions up to 32 bits.
  • This function cannot be used with the Image controls found in the reports.
  • This function can also be used to save the changes made by ImageInfoModify on the Exif tags of an image.
  • Java Saving images in JPEG format is supported only if the application is run by the Java Virtual Machine (JVM) distributed by SUN. Images in JPEG format cannot be saved with other Java virtual machines.
Linux Caution: A specific configuration is required to use this function in Linux. For more details, see The drawings.
// Sauve en mémoire l'image présente dans "IMG_ImageDessin"
ResSauvegarde = dSaveImageJPEG(IMG_ImageDessin, inMemory)
WINDEVUniversal Windows 10 AppUser code (UMC)
// Sauve l'image présente dans "IMG_ImageDessin" sur "C:\Documents\Image.JPEG"
ResSauvegarde = dSaveImageJPEG(IMG_ImageDessin, "C:\Documents\Image.JPEG")
WINDEVUser code (UMC)
// Modification des commentaires de l'image
// affichée dans le champ Image "IMG_MonChampImage"
ImageInfoModify(IMG_MonChampImage, imgComment, "Belles gorgones")
// Enregistrement de la modification dans le 
// fichier "C:\Plongees\Gorgone1.JPG"
dSaveImageJPEG(IMG_MonChampImage, "C:\Plongees\Gorgone1.JPG", 100, imgSaveTag)
Syntax
WINDEVUniversal Windows 10 AppJavaUser code (UMC)

Saving an image in a JPEG file Hide the details

<Result> = dSaveImageJPEG(<Image> , <File name> [, <Quality> [, <Exif tag>]])
<Result>: Boolean
  • True if the image was saved,
  • False otherwise. To get more details on the error, use ErrorInfo with the errMessage constant.
<Image>: Name of the Image control or variable
  • Name of the Image, Bar Code or Web Camera control to be used. Image controls in a report cannot be used.
  • Java Name of the Image control to be used.
  • Name of the Image variable to be used.
<File name>: Character string
Name and full (or relative) path of JPEG file. A UNC path can be used. The file extension is optional.
Caution:
  • The destination directory must exist in order for the image to be saved.
  • The existence of the JPEG file is not checked. This file is automatically overwritten if it already exists.
<Quality>: Optional integer
Quality of the image saved. Value between 1 and 100 (80 by default). Lower image quality translates into higher image compression rate and smaller file size.
<Exif tag>: Optional constant (or combination of constants)
Save the Exif tags modified by ImageInfoModify:
imgAddThumbnailAdds a thumbnail into the image file (<File name>).
If there is a thumbnail in the image file displayed in the Image control, this constant is not taken into account.
Java This constant is not available.
imgGrayScaleUsed to save the image in black and white ("Grayscale" display mode).
imgProgressiveJPEGUsed to save the image in progressive JPEG format. This format is mainly used for the Web sites. It allows the pages to be loaded faster (the images being loaded and displayed progressively).
imgSaveTagSaves the Exif tags.
If there is a thumbnail in the image file displayed in the Image control, a new thumbnail is recalculated.
Java This constant is not available.

By default, the Exif tags are not saved, no operation is performed on the thumbnails.
Universal Windows 10 App This parameter is not available.
Universal Windows 10 App Syntax not available

Saving an image in memory Hide the details

<Result> = dSaveImageJPEG(<Image> , <inMemory> [, <Quality> [, <Exif tag>]])
<Result>: Buffer
Byte string containing the image in JPEG format.
Then this byte string can be assigned to an Image control, saved in a file (fSaveText), sent via a network (with the Socket functions), ...
<Image>: Name of the Image control or variable
  • Name of the Image, Bar Code or Web Camera control to be used. Image controls in a report cannot be used.
  • Java Name of the Image control to be used.
  • Name of the Image variable to be used.
<inMemory>: Constant
inMemory: Constant used to save an image in memory.
<Quality>: Optional integer
Quality of the image saved. Value between 1 and 100 (80 by default). Lower image quality translates into higher image compression rate and smaller file size.
<Exif tag>: Optional constant (or combination of constants)
Save the Exif tags modified by ImageInfoModify:
imgAddThumbnailAdds a thumbnail into the image file (<File name>).
If there is a thumbnail in the image file displayed in the Image control, this constant is not taken into account.
Java This constant is not available.
imgProgressiveJPEGUsed to save the image in progressive JPEG format. This format is mainly used for the Web sites. It allows the pages to be loaded faster (the images being loaded and displayed progressively).
imgSaveTagSaves the Exif tags.
If there is a thumbnail in the image file displayed in the Image control, a new thumbnail is recalculated.
Java This constant is not available.

By default, the Exif tags are not saved, no operation is performed on the thumbnails.
This parameter is available only if <Control name> corresponds to the name of an Image control.
Remarks

Image found in a Web Camera control

Only the image displayed when dSaveImageJPEG is executed is saved. To save this image, you can also use:
  • the VideoCapture function: the image will be saved as a BMP file
  • the dSaveImageBMP function: the image will be saved in BMP format or in memory
  • the dSaveImageGIF function: the image will be saved in GIF format or in memory
  • the dSaveImagePNG function: the image will be saved in PNG format or in memory.
Component: wd300pnt.dll
Minimum version required
  • Version 9
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Last update: 06/22/2024

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