<?php
///////////////////////////////////////////////////////////////////////////////
// //
// graphics.php //
// Version 1.0 (5/28/2003) //
// //
///////////////////////////////////////////////////////////////////////////////
// //
// Line graphics generator configurable library //
// Creator: Guillermo Guti�rrez Almazor //
// //
// You are free to modify and redistribute this library. //
// I only ask you to mail me the changes made to this code :) //
// mail: 100030506@alumnos.uc3m.es //
// //
///////////////////////////////////////////////////////////////////////////////
// //
// You can create graphics with thees two functions. The first one creates a //
// PNG image with a grid of x width and y height, vertical and horizontal //
// indexes and some left margin to accomodate vertical indexes. You can also //
// select item colors passing them through the function arguments in //
// hexadecimal. The second function creates the metioned grid and puts in it //
// the lines plotted using the data passed through the data array. It also //
// calculates the cells width and the margin needed to accomodate indexes //
// dinamycally, so you only have to worry about putting the indexes and data //
// properly, independently how many characters have in them and how many px //
// will they occupy. You also must pass the function an array with the //
// color to use for the traces. //
// //
///////////////////////////////////////////////////////////////////////////////
// //
// For more information, read the code comments //
// //
///////////////////////////////////////////////////////////////////////////////
function generate_grid($filename, $rows, $columns, $margin, $cell_width, $cell_height, $bg_color,
$altern_color_1, $altern_color_2, $grid_color, $text_color, $a_v_indexes, $a_h_indexes) {
// I check the arguments first to see if they're filled. If they're
// i use default settings. You can modify them thru this part of the code
if ($filename == "") { $filename = "prueba.png"; }
if ($rows == "") { $rows = 10; }
if ($columns == "") { $columns = 12; }
if ($margin == "") { $margin = 20; }
if ($cell_width == "") { $cell_width = 20; }
// cell_height accepts a minimum of 12 px but you don't see the indexes very well
// with this number, so i recomend a minimum of 20 px height
if ($cell_height == "") {
$cell_height = 20;
}
if ($bg_color == "") { $bg_color = "ffffff"; }
if ($altern_color_1 == "") { $altern_color_1 = "0099cc"; }
if ($altern_color_2 == "") { $altern_color_2 = "bdd7e7"; }
if ($grid_color == "") { $grid_color = "000000"; }
if ($text_color == "") { $text_color = "000000"; }
if ($a_v_indexes == "") {
for ($i = 0; $i <= $rows; $i ++) {
$a_v_indexes[$i] = $i;
}
}
if ($a_h_indexes == "") {
for ($i = 0; $i <= $columns; $i ++) {
$a_h_indexes[$i] = $i;
}
}
// Create the image in memory, adding some margins ti accomodate indexes
// Note: Margins are like following:
// Left: amount of px passed thru $margin argument
// Right: One cells width is used as margin
// Top and bottom: 20 px are used
$image = imagecreatetruecolor(($ancho_px + $margin + $cell_width), $alto_px + 40);
// Erase the image from memory
imagedestroy($image);
}
function graphic($a_data, $a_v_indexes, $a_h_indexes, $a_colors) {
// Default filename. You can modify this so as it is passed thru arguments (better)
$file_name = "grafica.png";
// Getting number of rows and columns
$rows = count($a_v_indexes);
$columns = count($a_h_indexes);
// Calculating size of margins
$n = 0;
for ($i = 0; $i < count($a_v_indexes); $i ++) {
if (strlen($a_v_indexes[$i]) > $n) {
$n = strlen($a_v_indexes[$i]);
}
}
$margin = 8 * ($n + 1); // Each letter is 8 px (more or less) width, spaces included
// Calculating with of cells
$n = 0;
for ($i = 0; $i < count($a_h_indexes); $i ++) {
if (strlen($a_h_indexes[$i]) > $n) {
$n = strlen($a_h_indexes[$i]);
}
}
$cell_width = ($n + 1) * 8;
// A little correction
if ($cell_width < 20) {
$cell_width = 20;
}
// Height of cells doesn't matter at all, but i make a little correction
// if the rows to show are very few.
if ($rows < 10) {
$cell_height = 35;
} else {
$cell_height = 20;
}
// Grid generation. Remember to have write permissions on the directory of the script to
place the image file
generate_grid($file_name, ($rows-1), ($columns-1), $margin, $cell_width,
$cell_height, "", "", "", "", "", $a_v_indexes, $a_h_indexes);
// We recover image from the file to memory
$image = imagecreatefrompng($file_name);
