dFont (Function)

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Using the drawing functions
Fonts
Fonts in PHP
Drawing in PHP
Drawing in Browser code

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dFont (Function)

In french: dPolice

Declares the font that will be used by dText:

in an Image control,
in a variable of type Image.
This type of variable is not available.
in a variable of type WDPic (on the background layer),
in a variable of type picLayer.

Caution: A specific configuration is required to use this function in Linux. For more details, see The drawings.

Example

// Initialize the drawing in an Image control
dStartDrawing(IMG_Drawing)

// Declare the character font:
// Arial, size 12, bold
dFont("Arial", 12, iBold)

// Declare the character font:
// Arial, size 12, bold
dFont(IMG_Drawing, "Arial", 12, iBold)

Syntax

Using a specific font for the drawings Hide the details

dFont([<Image>, ] [, [, [, <Text inclination>]]])

<Image>: Optional control name or optional Image, WDPic or picLayer variable

Image to use. The image can correspond to:
the name of an Image control.
the name of a variable of type Image.
the name of a variable of type WDPic. Only the background layer will be handled.
the name of a variable of type picLayer.
If this parameter is not specified, it is necessary to define the drawing destination with dStartDrawing.

: Character string

Name of the font used when the text is drawn by dText. This parameter must not correspond to a font family. The list of fonts installed on the current computer is returned by FontList.
If the name of the font is not found, Windows searches for a font whose name is close to the requested one. To do so, dStartDrawing must have been used.

: Optional integer

Size of the font (in pixels). The default value is 12.

: Optional constant (or combination of constants)

Font attributes to use:
iBold Assigns the bold attribute to the text drawn.
iItalic Assigns the italic attribute to the text drawn.
iNormal
(Default value) Normalizes the text drawn
iStrikeOut Strikes the text drawn.
This constant is not supported.
iUnderlined Underlines the text drawn.
This constant is not supported.

<Text inclination>: Optional integer

Specifies the inclination of the text (in degrees). The default value is 0.

Using a font created through programming Hide the details

dFont([<Image>, ] )

<Image>: Optional control name or optional Image, WDPic or picLayer variable

Image to use. The image can correspond to:
the name of an Image control.
the name of a variable of type Image.
the name of a variable of type WDPic. Only the background layer will be handled.
the name of a variable of type picLayer.
If this parameter is not specified, it is necessary to define the drawing destination with dStartDrawing.

: Font

Font that will be used for the drawings. This parameter corresponds to a variable of type Font. The font characteristics have been defined by the FontCreate function or via the font properties.

Remarks

Using the drawing functions

The drawing functions can be used according to 2 methods:

Method 1: Using dStartDrawing
- dStartDrawing must be called before any other drawing function. dStartDrawing is used to define the element (Image control or variable) to which the drawing functions will be applied.
- When drawing on an Image control:
  - The drawing functions operate on a copy ("bitmap") of the image. You can use the drawing functions of Windows (via API or CallDLL32) but these functions must use the DC (Device Context) returned by dStartDrawing.
  - dEndDrawing and dStartDrawing must not be called in the same process.
    The drawing will not be displayed if dEndDrawing and dStartDrawing are called in the same process: it will be automatically erased.
Method 2: indicating the drawing target directly in the syntax (via a parameter)
The <Image> parameter is used to specify directly the target of the drawing. dStartDrawing becomes useless. This function must be deleted.

Fonts

FontList is used to retrieve the list of valid fonts (TrueType, PostScript) installed on the current computer.

To get good results when angling the text drawn, the used must be a "True Type" font.

Fonts in PHP

To use the formatting attributes (bold, italic, ...), the files of corresponding fonts must be accessible (ttf files). These files must be in the directory of the site (directory _WEB returned by fWebDir) and be named as follows:

<Name of standard font>
<Name of standard font>_Bold
<Name of standard font>_Italic
<Name of standard font>_Italic_Bold

The management of the underlined is automatic like the management of &.

If no font is found, the text will be normal, without management of &.

Drawing in PHP

In PHP, the drawing functions are based on the graphic library GD. This library is commonly used by the PHP hosting providers 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.

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. To do so, the HTML mode must be "HTML 4.01 Transitional + DTD". This option is available in the "Advanced" tab of the project description window.
Reminder: To open the project description window, go to the "Project" tab, "Project" group and 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.

Business / UI classification: Neutral code

Component: wd300pnt.dll