PC SOFT

ONLINE HELP
 WINDEVWEBDEV AND WINDEV MOBILE

Home | Sign in | English EN
This content has been translated automatically. Click here to view the French version.
  • Displaying a PNG image
  • Transparent image in PNG format
WINDEV
WindowsLinuxUniversal Windows 10 AppJavaReports and QueriesUser code (UMC)
WEBDEV
WindowsLinuxPHPWEBDEV - Browser code
WINDEV Mobile
AndroidAndroid Widget iPhone/iPadIOS WidgetApple WatchMac CatalystUniversal Windows 10 App
Others
Stored procedures
Saves an image:
  • in a file in PNG format.
  • in memory.
This image corresponds to the image contained in one of the following elements:
  • in an Image control.
  • in an Image variable.
  • 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.
  • The border of the Image control (if it exists) is also saved.
    Reminder: The border of the Image control is defined in the "Style" tab of the description window of control.
  • 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.
Versions 15 and later
Linux This function is now available for WEBDEV sites in Linux.
Linux Caution: A specific configuration is required to use this function in Linux. For more details, see The drawings.
New in version 15
Linux This function is now available for WEBDEV sites in Linux.
Linux Caution: A specific configuration is required to use this function in Linux. For more details, see The drawings.
Linux This function is now available for WEBDEV sites in Linux.
Linux Caution: A specific configuration is required to use this function in Linux. For more details, see The drawings.
Versions 18 and later
Universal Windows 10 App This function is now available in Windows Store apps mode.
New in version 18
Universal Windows 10 App This function is now available in Windows Store apps mode.
Universal Windows 10 App This function is now available in Windows Store apps mode.
Versions 21 and later
Universal Windows 10 App This function is now available in Universal Windows 10 App mode.
New in version 21
Universal Windows 10 App This function is now available in Universal Windows 10 App mode.
Universal Windows 10 App This function is now available in Universal Windows 10 App mode.
// Sauve l'image présente dans "IMG_ImageDessin" sur "C:\Documents\Image.PNG"
ResSauvegarde = dSaveImagePNG(IMG_ImageDessin, "C:\Documents\Image.PNG")
// Sauve en mémoire l'image présente dans "IMG_ImageDessin"
ResSauvegarde = dSaveImagePNG(IMG_ImageDessin, inMemory)
Syntax
WINDEVUniversal Windows 10 AppJavaUser code (UMC)

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

<Result> = dSaveImagePNG(<Image name> , <File name> [, <Transparency color>])
<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 the Image control, Bar Code control or Web Camera control to save. The Image controls found in a report cannot be used.
  • Java Name of the Image control to use.
  • Name of the variable of type Image to be used.
<File name>: Character string
Name and full (or relative) path of PNG 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 PNG file is not checked. This file is automatically overwritten if it already exists.
<Transparency color>: Optional integer
Color that will be considered as being transparent in the image. This color can correspond to:If this parameter is not specified, the generated image is not transparent.
Universal Windows 10 App Syntax not available

Saving an image in memory Hide the details

<Result> = dSaveImagePNG(<Image name> , <inMemory> [, <Transparency color>])
<Result>: Buffer
Byte string containing the image in PNG format.
This string of bytes can then be assigned to an Image control, saved in a file (fSaveText function), sent through a network (thanks to 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.
  • Java Name of the Image control to use.
  • Name of the variable of type Image to be used.
<inMemory>: Constant
inMemory: Constant used to save an image in memory.
<Transparency color>: Optional integer
Color that will be considered as being transparent in the image. This color can correspond to:If this parameter is not specified, the generated image is not transparent.
Remarks

Displaying a PNG image

Caution: If the image in PNG format is semi-transparent, the display of the image is slower.

Transparent image in PNG format

To save a transparent image in PNG format, the Image control must be filled with the transparent color beforehand.
Example used to draw a transparent line and to save it in PNG format:
dStartDrawing(IMG_Image1, dWithOpacity)
dChangeMode(drawDefault)
FOR nI = 0 _TO_ IMG_Image1..Width
FOR nJ = 0 _TO_ IMG_Image1..Height
 dPoint(nI, nJ, RGB(255,255,255), 0)
END
END
dPen(RGB(100, 020, 200), 0,10, 100)
dLine(10, 10, 100, 10)
dSaveImagePNG(IMG_Image1, CompleteDir(fExeDir()) + "img.png")
Component: wd270pnt.dll
Minimum version required
  • Version 9
This page is also available for…
Comments
Click [Add] to post a comment