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  • Displaying a PNG image
  • Transparent image in PNG format
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Stored procedures
Saves an image found in an Image variable:
  • in a file in PNG format.
  • in memory.
Versions 15 and later
WEBDEV - Server codeLinux 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
WEBDEV - Server codeLinux 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.
WEBDEV - Server codeLinux 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 16 and later
Android This function is now available for Android applications.
New in version 16
Android This function is now available for Android applications.
Android This function is now available for Android applications.
Versions 17 and later
iPhone/iPad This function is now available for iPhone/iPad applications.
New in version 17
iPhone/iPad This function is now available for iPhone/iPad applications.
iPhone/iPad This function is now available for iPhone/iPad applications.
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.
Example
MonImage est une Image = "Test.gif"
// Sauve l'image présente dans MonImage sur "C:\Documents\Image.PNG"
ResSauvegarde = MonImage.SauvePNG("C:\Documents\Image.PNG")
MonImage est une Image = "Test.gif"
// Sauve en mémoire l'image présente dans MonImage
ResSauvegarde = MonImage.SauvePNG(enMémoire)
Syntax
WINDEVWEBDEV - Server codeReports and QueriesUniversal Windows 10 AppAndroidiPhone/iPadIOS WidgetMac CatalystJavaUser code (UMC)Ajax

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

<Result> = <Image variable>.SavePNG(<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 variable>: Image variable
Name of the Image variable 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> = <Image variable>.SavePNG(<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 variable>: Image variable
Name of the Image variable 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.
Android This parameter is ignored.
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:
MonImage est une Image = "Test.gif"
MonImage.DébutDessin(dAvecOpacité)
MonImage.ChangeMode(dessinNormal)
POUR nI = 0 _À_ MonImage..Largeur
POUR nJ = 0 _À_ MonImage1..Hauteur
 MonImage.DessinePoint(nI, nJ, RVB(255,255,255), 0)
FIN
FIN
MonImage.Stylo(RVB(100, 020, 200), 0,10, 100)
MonImage.DessineLigne(10, 10, 100, 10)
MonImage.SauvePNG(ComplèteRep(fRepExe()) + "img.png")
Component: wd270pnt.dll
Minimum version required
  • Version 24
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