dSaveImageGIF (Function)

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dSaveImageGIF (Function)

In french: dSauveImageGIF

Saves an image:

in a file in GIF format.
in memory.

This image corresponds to the image found:

in an Image control.
Versions 17 and later
in an Image variable.
New in version 17
in an Image variable.
in an Image variable. in an Image variable.
This type of variable is not available.
in a Bar Code control.
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 enables you to save images for screen resolutions up to 32 bits.
This function cannot be used with the Image controls found in the reports.

In browser code, this function can only be used to save an image in memory.

Versions 16 and later

This function is now available in Browser code.

In browser code, this function can only be used to save an image in memory.

New in version 16

This function is now available in Browser code.

In browser code, this function can only be used to save an image in memory.

This function is now available in Browser code.

In browser code, this function can only be used to save an image in memory.

Versions 17 and later

This function is now available for WINDEV applications in Linux.

This function is now available for WEBDEV sites in Linux.

Caution: A specific configuration is required to use this function in Linux. See The drawings for more details.

New in version 17

This function is now available for WINDEV applications in Linux.

This function is now available for WEBDEV sites in Linux.

Caution: A specific configuration is required to use this function in Linux. See The drawings for more details.

This function is now available for WINDEV applications in Linux.

This function is now available for WEBDEV sites in Linux.

Caution: A specific configuration is required to use this function in Linux. See The drawings for more details.

Example

See additional examples

// Saves in memory the image found in "IMG_ImageDrawing"
ResSave = dSaveImageGIF(IMG_ImageDrawing, inMemory)

// Saves the image found in "IMG_ImageDrawing" in "C:\Documents\Image.GIF"
ResSave = dSaveImageGIF(IMG_ImageDrawing, "C:\Documents\Image.GIF")

Syntax

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

<Result> = dSaveImageGIF(<Image name> , <File name> [, <Number of colors>])

<Result>: Boolean

True if the image was saved,
False otherwise. To find out the error details, use ErrorInfo associated with the errMessage constant.

<Image name>: Character string (with or without quotes) or Image 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 Image control or Web Camera control to use
Versions 17 and later
Name of the Image variable to use.
New in version 17
Name of the Image variable to use.
Name of the Image variable to use.
Versions 17 and later
Name of the Image variable to use.
New in version 17
Name of the Image variable to use.
Name of the Image variable to use. Name of the Image variable to use.
This type of variable is not available.

<File name>: Character string

Name and full (or relative) path of GIF 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 GIF file is not checked. This file is automatically overwritten if it already exists.

<Number of colors>: Optional integer

Number of colors for the image saved. Value included between 16 and 256 (256 by default). This parameter corresponds to the number of colors proposed in the color palette when using the GIF file.

Saving an image in memory Hide the details

<Result> = dSaveImageGIF(<Image name> , <inMemory> [, <Number of colors>])

<Result>: Buffer

Byte string containing the image in GIF 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), ...
In browser code, this byte string can only be assigned to another image ("Localize the image in the _WEB directory in browser code" must be unchecked). It cannot be saved in a file to build an image file.

<Image name>: Character string (with or without quotes) or Image variable

Name of Image control, Bar Code control or Web Camera control to save. The Image controls found in a report cannot be used.
Name of Image control or Web Camera control to use
Versions 17 and later
Name of the Image variable to use.
New in version 17
Name of the Image variable to use.
Name of the Image variable to use. Name of the Image variable to use.
This type of variable is not available.

<inMemory>: Constant

inMemory: Constant used to save an image in memory.

<Number of colors>: Optional integer

Number of colors for the image saved. Value included between 16 and 256 (256 by default). This parameter corresponds to the number of colors proposed in the color palette when using the GIF file.

Remarks

Image found in a Web Camera control

Only the image displayed when dSaveImageGIF is run will be saved in GIF format. To save this image, you can also use:

VideoCapture: the image will be saved in BMP format
dSaveImageBMP: the image will be saved in BMP format or in memory
the function dSaveImageJPEG: the image will be saved in JPEG format or in memory
the function dSaveImagePNG: the image will be saved in PNG format or in memory

Versions 16 and later

Drawing in browser code

The image saved in memory can be directly assigned to an Image control. Depending on the browser used, the result may not be the expected one.

For example, with the current version of FireFox (available when this documentation was published), the images in GIF format are not displayed properly.

This operating mode may be improved during the next upgraded versions of this browser.

New in version 16

Drawing in browser code

The image saved in memory can be directly assigned to an Image control. Depending on the browser used, the result may not be the expected one.

For example, with the current version of FireFox (available when this documentation was published), the images in GIF format are not displayed properly.

This operating mode may be improved during the next upgraded versions of this browser.

Drawing in browser code

The image saved in memory can be directly assigned to an Image control. Depending on the browser used, the result may not be the expected one.

For example, with the current version of FireFox (available when this documentation was published), the images in GIF format are not displayed properly.

This operating mode may be improved during the next upgraded versions of this browser.

Drawing in PHP

In PHP, the drawing functions are based on the graphic library GD. This library is commonly used by the PHP hosting companies and therefore it is always enabled. The version of the GD library must be version 2.0.28 (or later). This library can be downloaded from the PHP site.

To enable (if necessary) this library locally, the following elements are required:

PHP installed.
the PHP.INI file found in the Windows directory must contain the following line: "extension=php_gd2.dll" (instead of ";extension=php_gd2.dll").
the php_gd2.dll file must exist in the directory of PHP extensions. This directory is defined in the PHP.INI file by the "extension_dir" variable.

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