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|imagecreatefromjpeg: additions not dipsplaying proper color
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|Author:||WoodyNaDobhar [ Mon Dec 27, 2004 10:01 pm ]|
|Post subject:||imagecreatefromjpeg: additions not dipsplaying proper color|
php version: 4.2.2
GD Version: 1.6.2 or higher //I dunno what it means by that, that's just what phpinfo() tells me.
image of which I speak:
purpose: get a list of amtgard groups in Ohio and display a block over the location of each (the location being determined by zip/lat&long db comparing to the zip of the group) on the map.
header ("Content-type: image/png");
function getlocationcoords($lat, $lon, $width, $height)
$x = (650-(($lon-80.53357) * ($width / 4.25216)));
$y = (707-(($lat-38.465171) * ($height / 3.445505)));
// First we load the background/base map.
// We will also allocate the colors for the markers and the text, as well as the font
$im = imagecreatefromjpeg("images/ohio.jpg");
$black = imagecolorallocate($im, 0, 0, 0);
$red = imagecolorallocate ($im, 255,0,0);
$grey = imagecolorallocate ($im, 100,100,100);
$white = imagecolorallocate($im, 255, 255, 255);
$font = '/home/httpd/vhosts/ohioamtgard.com/httpdocs/Braveheart.ttf';
// Next need to find the base image size.
// We need these variables to be able scale the long/lat coordinates.
$scale_x = imagesx($im);
$scale_y = imagesy($im);
$getgroups=mysql_query("SELECT t1.lat, t1.long, t2.name FROM CENSORED as t1, CENSORED as t2 WHERE t1.zip=t2.location", $db) or
// Now we convert the long/lat coordinates into screen coordinates
$pt = getlocationcoords($lat, $long, $scale_x, $scale_y);
// Now mark the point on the map using a red 40 pixel rectangle
// Add some shadow for the text
imagettftext($im, 18, 0, $pt["x"]+1, $pt["y"]+1, $grey, $font, $text);
// Add the text
imagettftext($im, 18, 0, $pt["x"], $pt["y"], $black, $font, $text);
// Return the map image.
It looks like it's using the closest color already existing on the image, but when I added a red splotch to the image, it still displayed the incorrect color.
I get the impression it might have something to do with my GD version, but I've not seen a solution short of loading 2.0 | >, something I don't have the authority to do.
Any help is welcomed
feyd | Help us, help you. Please use
|Author:||feyd [ Mon Dec 27, 2004 10:11 pm ]|
Moved to Graphics.
|Author:||WoodyNaDobhar [ Mon Dec 27, 2004 10:21 pm ]|
Sorry 'bout that duly noted...
|Author:||onion2k [ Tue Dec 28, 2004 6:05 am ]|
Its the GD version alright. You can only create truecolour images with GD2. A way around it would be to reduce the number of colours in your map, convert it to a PNG, and load it using imagecreatefrompng().
Disclaimer: I think thats right.
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