dResize (Function)

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dResize (Function)

In french: dRedimensionne

Resizes an 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.
Versions 25 and later
in a picLayer variable.
New in version 25
in a picLayer variable.
in a picLayer variable.

Versions 16 and later

This function is now available for Android applications.

This function is now available in Browser code.

New in version 16

This function is now available for Android applications.

This function is now available in Browser code.

This function is now available for Android applications.

This function is now available in Browser code.

Versions 17 and later

This function is now available for the WINDEV applications in Linux.

This function is now available for WEBDEV sites in Linux.

This function is now available for iPhone/iPad applications.

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 the WINDEV applications in Linux.

This function is now available for WEBDEV sites in Linux.

This function is now available for iPhone/iPad applications.

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

This function is now available for the WINDEV applications in Linux.

This function is now available for WEBDEV sites in Linux.

This function is now available for iPhone/iPad applications.

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

Versions 21 and later

This function is now available in Universal Windows 10 App mode.

New in version 21

This function is now available in Universal Windows 10 App mode.

Example

// Zoom on the IMG_Image1 control: the size of the image displayed in the control is doubled
Result1 is boolean
Result1 = dResize(IMG_Image1, IMG_Image1..Width * 2, IMG_Image1..Height * 2)
IF Result1 = False THEN Error("The operation failed")

Syntax

<Result> = dResize(<Image> , <New width> , <New height> [, <Option>])

<Result>: Boolean

True if the resize operation was performed,
False otherwise.

<Image>: Control name, Image variable or picLayer variable

Image to use. This image can correspond to:
the name of an Image control.
Versions 17 and later
the name of an Image variable.
New in version 17
the name of an Image variable.
the name of an Image variable. the name of an Image variable.
This type of variable is not available.
Versions 25 and later
the name of a picLayer variable.
New in version 25
the name of a picLayer variable.
the name of a picLayer variable.

<New width>: Integer

New image width expressed in pixels.

<New height>: Integer

New height of the image expressed in pixels.

<Option>: Optional Integer constant

Versions 17 and later
Options for resizing:
drStretched
(Default value) The image is stretched (if necessary) to correspond to the new specified width and to the new specified height.
This constant is not available.
Versions 18 and later
drHighQuality
New in version 18
drHighQuality
drHighQuality This constant can be combined with the homothetic resizing options.
In homothetic mode, this constant is used to improve the quality of the image when this one is reduced in relation to its initial size.
This constant is not available.
drHomothetic The image is stretched or reduced to occupy the defined space in an optimal way without being distorted. It occupies:
the entire specified height.
the entire specified width.
This constant is not available.
drHomotheticCentered The image is stretched or reduced to occupy the defined space in an optimal way without being distorted and it is centered. It occupies:
the entire specified height: the image is centered horizontally.
the entire specified width: the image is centered vertically.
This constant is not available.
drHomotheticExtended The image is stretched or reduced in order for the smallest side of the image to be entirely displayed.
This constant is not available.
drTiled The image is tiled to occupy the entire new specified width and the entire new specified height.
This constant is not available.
Options for resizing:
drStretched
(Default value) The image is stretched (if necessary) to correspond to the new specified width and to the new specified height.
This constant is not available.
Versions 18 and later
drHighQuality
New in version 18
drHighQuality
drHighQuality This constant can be combined with the homothetic resizing options.
In homothetic mode, this constant is used to improve the quality of the image when this one is reduced in relation to its initial size.
This constant is not available.
drHomothetic The image is stretched or reduced to occupy the defined space in an optimal way without being distorted. It occupies:
the entire specified height.
the entire specified width.
This constant is not available.
drHomotheticCentered The image is stretched or reduced to occupy the defined space in an optimal way without being distorted and it is centered. It occupies:
the entire specified height: the image is centered horizontally.
the entire specified width: the image is centered vertically.
This constant is not available.
drHomotheticExtended The image is stretched or reduced in order for the smallest side of the image to be entirely displayed.
This constant is not available.
drTiled The image is tiled to occupy the entire new specified width and the entire new specified height.
This constant is not available.
This parameter is not available.
New in version 17
Options for resizing:
drStretched
(Default value) The image is stretched (if necessary) to correspond to the new specified width and to the new specified height.
This constant is not available.
Versions 18 and later
drHighQuality
New in version 18
drHighQuality
drHighQuality This constant can be combined with the homothetic resizing options.
In homothetic mode, this constant is used to improve the quality of the image when this one is reduced in relation to its initial size.
This constant is not available.
drHomothetic The image is stretched or reduced to occupy the defined space in an optimal way without being distorted. It occupies:
the entire specified height.
the entire specified width.
This constant is not available.
drHomotheticCentered The image is stretched or reduced to occupy the defined space in an optimal way without being distorted and it is centered. It occupies:
the entire specified height: the image is centered horizontally.
the entire specified width: the image is centered vertically.
This constant is not available.
drHomotheticExtended The image is stretched or reduced in order for the smallest side of the image to be entirely displayed.
This constant is not available.
drTiled The image is tiled to occupy the entire new specified width and the entire new specified height.
This constant is not available.
Options for resizing:
drStretched
(Default value) The image is stretched (if necessary) to correspond to the new specified width and to the new specified height.
This constant is not available.
Versions 18 and later
drHighQuality
New in version 18
drHighQuality
drHighQuality This constant can be combined with the homothetic resizing options.
In homothetic mode, this constant is used to improve the quality of the image when this one is reduced in relation to its initial size.
This constant is not available.
drHomothetic The image is stretched or reduced to occupy the defined space in an optimal way without being distorted. It occupies:
the entire specified height.
the entire specified width.
This constant is not available.
drHomotheticCentered The image is stretched or reduced to occupy the defined space in an optimal way without being distorted and it is centered. It occupies:
the entire specified height: the image is centered horizontally.
the entire specified width: the image is centered vertically.
This constant is not available.
drHomotheticExtended The image is stretched or reduced in order for the smallest side of the image to be entirely displayed.
This constant is not available.
drTiled The image is tiled to occupy the entire new specified width and the entire new specified height.
This constant is not available.
This parameter is not available.
Options for resizing:
drStretched
(Default value) The image is stretched (if necessary) to correspond to the new specified width and to the new specified height.
This constant is not available.
Versions 18 and later
drHighQuality
New in version 18
drHighQuality
drHighQuality This constant can be combined with the homothetic resizing options.
In homothetic mode, this constant is used to improve the quality of the image when this one is reduced in relation to its initial size.
This constant is not available.
drHomothetic The image is stretched or reduced to occupy the defined space in an optimal way without being distorted. It occupies:
the entire specified height.
the entire specified width.
This constant is not available.
drHomotheticCentered The image is stretched or reduced to occupy the defined space in an optimal way without being distorted and it is centered. It occupies:
the entire specified height: the image is centered horizontally.
the entire specified width: the image is centered vertically.
This constant is not available.
drHomotheticExtended The image is stretched or reduced in order for the smallest side of the image to be entirely displayed.
This constant is not available.
drTiled The image is tiled to occupy the entire new specified width and the entire new specified height.
This constant is not available.
Options for resizing:
drStretched
(Default value) The image is stretched (if necessary) to correspond to the new specified width and to the new specified height.
This constant is not available.
Versions 18 and later
drHighQuality
New in version 18
drHighQuality
drHighQuality This constant can be combined with the homothetic resizing options.
In homothetic mode, this constant is used to improve the quality of the image when this one is reduced in relation to its initial size.
This constant is not available.
drHomothetic The image is stretched or reduced to occupy the defined space in an optimal way without being distorted. It occupies:
the entire specified height.
the entire specified width.
This constant is not available.
drHomotheticCentered The image is stretched or reduced to occupy the defined space in an optimal way without being distorted and it is centered. It occupies:
the entire specified height: the image is centered horizontally.
the entire specified width: the image is centered vertically.
This constant is not available.
drHomotheticExtended The image is stretched or reduced in order for the smallest side of the image to be entirely displayed.
This constant is not available.
drTiled The image is tiled to occupy the entire new specified width and the entire new specified height.
This constant is not available.
This parameter is not available.

Remarks

End of drawing

The transformation of the image will not be displayed if dEndDrawing and dResize are called in the same process.

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.

Versions 16 and later

Drawing in Browser code

Some drawing functions are available in Browser code. The drawing functions in Browser code are based on the HTML 5 standard. More specifically, these functions are based on the "canvas" tag of HTML 5.

The drawing features in browser code are available for the recent browsers only (supporting the HTML 5 standard). To find out whether the drawing features are proposed by your browser, use DrawingAvailable.

Caution: To use the drawing functions with Internet Explorer 9, the project must "include the reference to the DTD file". This option is available in the "Advanced" tab of description window of project ("Project .. Project description"), "Advanced" button, "W3C standard" option.

Caution: To use the drawing functions with Internet Explorer 9, the project must "include the reference to the DTD file". This option is available in the "Advanced" tab of the description window of the project ("Project .. Project description").

Caution: To use the drawing functions with Internet Explorer 9, the project must include the reference to the DTD file. To do so, the HTML mode must be "HTML 4.01 Transitional + DTD". This option is available in the "Advanced" tab of the description window of project.
Reminder: To display the description window of project, on the "Project" pane, in the "Project" group, click "Description".

Special case: Drawing in the browser of an Android phone: The browser drawing functions are only available starting with version 3 of Android.

New in version 16

Drawing in Browser code

Special case: Drawing in the browser of an Android phone: The browser drawing functions are only available starting with version 3 of Android.

Drawing in Browser code

Special case: Drawing in the browser of an Android phone: The browser drawing functions are only available starting with version 3 of Android.

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