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  • Image found in a Web Camera control
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Stored procedures
Saves an image:
  • in a file in JPEG format.
  • in memory.
This image corresponds to the image found:
  • in an Image control.
  • in an Image variable.
  • in a Bar Code control.
  • 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 also allows you to save changes made to the Exif tags of an Image using the ImageInfoModify function.
// Sauve en mémoire l'image présente dans "IMG_ImageDessin"
ResSauvegarde = dSaveImageJPEG(IMG_ImageDessin, inMemory)
Reports and Queries
// Sauve l'image présente dans "IMG_ImageDessin" sur "C:\Documents\Image.JPEG"
ResSauvegarde = dSaveImageJPEG(IMG_ImageDessin, "C:\Documents\Image.JPEG")
Reports and Queries
// 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
Reports and Queries

Saving an image in a file in JPEG format Hide the details

<Result> = dSaveImageJPEG(<Image name> , <File name> [, <Quality> [, <Exif tag>]])
<Result>: Boolean
  • True if the image was saved,
  • False otherwise. To get the details of the error, use ErrorInfo with the errMessage constant.
<Image name>: Name of the Image control or variable
  • Name of Image control, Bar Code control or Web Camera control to use. The Image controls found in a report cannot be used.
  • Name of the variable of type Image 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)
Record of Exif tags modified with 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.
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).
imgGrayScaleUsed to save the image in black and white ("Grayscale" display mode).
imgSaveTagSaves the Exif tags.
If there is a thumbnail in the image file displayed in the Image control, a new thumbnail is recalculated.

By default, the Exif tags are not saved, no operation is performed on the thumbnails.

Saving an image in memory Hide the details

<Result> = dSaveImageJPEG(<Image name> , <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>: Name of the Image control or variable
  • Name of Image control, Bar Code control or Web Camera control to use. The Image controls found in a report cannot be used.
  • Name of the variable of type Image 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)
Record of Exif tags modified with 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.
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.

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 at the time the dSaveImageJPEG function is executed is saved. To save this image, you can also use:
  • the VideoCapture function: the image will be saved in BMP format
  • 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: wd270pnt.dll
Minimum version required
  • Version 9
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