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imagefilledarc

Image-Funktionen PHP Manual

(PHP 4 >= 4.0.6, PHP 5)

imagefilledarc — Draw a partial arc and fill it

Beschreibung

bool imagefilledarc ( resource $image , int $cx , int $cy , int $width , int $height , int $start , int $end , int $color , int $style )

Draws a partial arc centered at the specified coordinate in the given image .

Parameter-Liste

image

Eine von den verschiedenen Erzeugungsfunktionen wie imagecreatetruecolor() gelieferte Grafikressource.

cx

x-coordinate of the center.

cy

y-coordinate of the center.

width

The arc width.

height

The arc height.

start

The arc start angle, in degrees.

end

The arc end angle, in degrees. 0° is located at the three-o'clock position, and the arc is drawn clockwise.

color

A color identifier created with imagecolorallocate().

style

A bitwise OR of the following possibilities:

  1. IMG_ARC_PIE
  2. IMG_ARC_CHORD
  3. IMG_ARC_NOFILL
  4. IMG_ARC_EDGED

IMG_ARC_PIE and IMG_ARC_CHORD are mutually exclusive; IMG_ARC_CHORD just connects the starting and ending angles with a straight line, while IMG_ARC_PIE produces a rounded edge. IMG_ARC_NOFILL indicates that the arc or chord should be outlined, not filled. IMG_ARC_EDGED, used together with IMG_ARC_NOFILL, indicates that the beginning and ending angles should be connected to the center - this is a good way to outline (rather than fill) a 'pie slice'.

Rückgabewerte

Gibt bei Erfolg TRUE zurück. Im Fehlerfall wird FALSE zurückgegeben.

Beispiele

PHP Code
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// create image $image = imagecreatetruecolor(100, 100); // allocate some solors $white = imagecolorallocate($image, 0xFF, 0xFF, 0xFF); $gray = imagecolorallocate($image, 0xC0, 0xC0, 0xC0); $darkgray = imagecolorallocate($image, 0x90, 0x90, 0x90); $navy = imagecolorallocate($image, 0x00, 0x00, 0x80); $darknavy = imagecolorallocate($image, 0x00, 0x00, 0x50); $red = imagecolorallocate($image, 0xFF, 0x00, 0x00); $darkred = imagecolorallocate($image, 0x90, 0x00, 0x00); // make the 3D effect for ($i = 60; $i > 50; $i--) { imagefilledarc($image, 50, $i, 100, 50, 0, 45, $darknavy, IMG_ARC_PIE); imagefilledarc($image, 50, $i, 100, 50, 45, 75 , $darkgray, IMG_ARC_PIE); imagefilledarc($image, 50, $i, 100, 50, 75, 360 , $darkred, IMG_ARC_PIE); } imagefilledarc($image, 50, 50, 100, 50, 0, 45, $navy, IMG_ARC_PIE); imagefilledarc($image, 50, 50, 100, 50, 45, 75 , $gray, IMG_ARC_PIE); imagefilledarc($image, 50, 50, 100, 50, 75, 360 , $red, IMG_ARC_PIE); // flush image header('Content-type: image/png'); imagepng($image); imagedestroy($image);

Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:

Anmerkungen

Hinweis: Diese Funktion setzt die GD-Bibliothek in der Version 2.0.1 oder höher (empfohlen wird mindestens 2.0.28) voraus.

Image-Funktionen PHP Manual