Talking about PHP drawing (c)

Last talk about using GD as a variety of geometries, as well as fill color. It deliberately left such a more complex situation behind, which is the fill color of freeform and freeform polygons.

<?
　Header("Content-type: image/png");
　$im = ImageCreate (200, 100);
　$col_blk = ImageColorAllocate($im, 0,0,0);
　$col_grn = ImageColorAllocate($im, 0,255,0);
　$parray = array(40,10,60,10,70,20,60,50,40,50,30,20);
　// 定义一个数组，12个成员是6个点的横纵坐标。
　ImagePolygon($im,$parray,6,$col_grn);
　// 这就是绘制任意多边形的函数，$parray是刚才定义的数组，6表示六个点。注意六个点连成的是六边形。
　// 不必人为地为了闭合图形而在最后增加一个与第一点相同的点。
　ImagePNG($im);
　ImageDestroy($im);　
?>

You should have thought of the function of the freeform fill color:

<?
　Header("Content-type: image/png");
　$im = ImageCreate (200, 100);
　$col_blk = ImageColorAllocate($im, 0,0,0);
　$col_orn = ImageColorAllocate($im, 255,192,0);
　$col_yel = ImageColorAllocate($im, 255,255,0);
　$col_red = ImageColorAllocate($im, 255,0,0);
　$col_grn = ImageColorAllocate($im, 0,255,0);
　$col_blu = ImageColorAllocate($im, 0,0,255);
　$parray = array(40,10,60,10,70,20,60,50,40,50,30,20);
　ImageFilledPolygon($im,$parray,6,$col_grn);
　ImagePNG($im);
　ImageDestroy($im);　
?>

Well. We can write on the image below. However, do not be happy, to write Chinese characters still have to cost some trouble. This is explained gradually later again. Let's take a look at how to simply write a western character.

<?
　Header("Content-type: image/png");
　$im = ImageCreate (200, 250);
　$col_blk = ImageColorAllocate($im, 0,0,0);
　$col_orn = ImageColorAllocate($im, 255,192,0);
　$str="This is a test.";
　ImageString($im,1,10,10,$str,$col_orn);
　ImageString($im,2,10,30,$str,$col_orn);
　ImageString($im,3,10,60,$str,$col_orn);
　ImageString($im,4,10,100,$str,$col_orn);
　ImageString($im,5,10,150,$str,$col_orn);
　// 这里连续五次调用ImageString，在不同位置，
　// 分别用从小到大的字型输出了字符串 $str。
　// ImageString 函数只支持五种字型(1~5)
　ImagePNG($im);
　ImageDestroy($im);　
?>

Look again:

<?
　//Header("Content-type: image/png");
　$im = ImageCreate (200, 250);
　$col_blk = ImageColorAllocate($im, 0,0,0);
　$col_orn = ImageColorAllocate($im, 255,192,0);
　$str="This is a test.";　
　ImageStringUp($im,1,10,180,$str,$col_orn);
　ImageStringUp($im,2,20,180,$str,$col_orn);
　ImageStringUp($im,3,40,180,$str,$col_orn);
　ImageStringUp($im,4,70,180,$str,$col_orn);
　ImageStringUp($im,5,110,180,$str,$col_orn);
　// 函数名换成了 ImageStringUp，用法不变。
　// 是输出竖排的文字。
　ImagePNG($im);
　ImageDestroy($im);　
?>