|
|
|
|
|
|
| |
| <?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;
}
}
// Calculate the image dimensions
$ancho_px = $cell_width * $columns;
$alto_px = $cell_height * $rows;
// 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);
// Color definitions
$bg_color = imagecolorallocate($image, hexdec(substr($bg_color, 0, 2)), hexdec(substr
($bg_color, 2, 2)), hexdec(substr($bg_color, 4, 2)));
$text_color = imagecolorallocate($image, hexdec(substr($text_color, 0, 2)), hexdec
(substr($text_color, 2, 2)), hexdec(substr($text_color, 4, 2)));
$grid_color = imagecolorallocate($image, hexdec(substr($grid_color, 0, 2)), hexdec
(substr($grid_color, 2, 2)), hexdec(substr($grid_color, 4, 2)));
$altern_color_1 = imagecolorallocate($image, hexdec(substr($altern_color_1, 0, 2)), hexdec
(substr($altern_color_1, 2, 2)), hexdec(substr($altern_color_1, 4, 2)));
$altern_color_2 = imagecolorallocate($image, hexdec(substr($altern_color_2, 0, 2)), hexdec
(substr($altern_color_2, 2, 2)), hexdec(substr($altern_color_2, 4, 2)));
// Image background filling
imagefill($image, 0, 0, $bg_color);
// Writting the grid
for ( $xx=0; $xx < $columns; $xx++ ) {
for ( $yy=0; $yy < $rows; $yy++ ) {
$x1 = ($cell_width * $xx) + $margin;
$x2 = ($cell_width * ($xx+1)) + $margin;
$y1 = ($cell_height * $yy) + 20;
$y2 = ($cell_height * ($yy+1)) + 20;
// This is the grid itself
imagerectangle($image, $x1, $y1, $x2, $y2, $grid_color);
// Theese are the little 2px lines at the edges
if (($yy % 2) == 0) {
imagefill($image, ($x1+1), ($y1+1), $altern_color_1);
} else {
imagefill($image, ($x1+1), ($y1+1), $altern_color_2);
}
if ($xx == 0) {
imageline($image, $x1, $y1, ($x1 - 2), $y1, $grid_color);
}
if (($yy + 1) >= ($alto_px/$cell_height)) {
imageline($image, $x2, $y2, $x2, ($y2 + 2), $grid_color);
}
}
}
// Vertical indexes
for ($i = 0; $i <= $rows; $i ++) {
$yy = 12 + $cell_height * $i;
$texto = $a_v_indexes[($rows-$i)];
$n = strlen($texto);
$separacion = 8 * $n + 4;
imagestring($image, 4, ($margin - $separacion), $yy, $texto, $text_color);
}
// Horizontal indexes
for ($i = 0; $i <= $columns; $i ++) {
$xx = $margin - 5 + $cell_width * $i;
imagestring($image, 4, $xx, ($alto_px + 24), $a_h_indexes[$i], $text_color);
}
// PNG creation
imagepng($image, $filename);
// Erase the image from memory
imagedestroy($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);
// This loop takes data and traces the lines onto the grid
for ($n = 0; $n < count($a_data); $n ++) {
$data = $a_data[$n];
$x1 = $margin;
$y1 = 20 + (($rows-1) * $cell_height) - ($data[0] * (($rows-1) * $cell_height)/100);
for ($x = 1; $x < $columns; $x++) {
$color = $a_colors[$n];
$x2 = $margin + $x*$cell_width;
$y2 = 20 + (($rows-1) * $cell_height) - ($data[$x] * (($rows-1) *
$cell_height)/100);
$grid_color = imagecolorallocate($image, hexdec(substr($color, 0, 2)),
hexdec(substr($color, 2, 2)), hexdec(substr($color, 4, 2)));
imageline($image, $x1, $y1, $x2, $y2, $grid_color);
$x1 = $x2;
$y1 = $y2;
}
}
// PNG creation
imagepng($image, $file_name);
// Image removal from memory
imagedestroy($image);
// HTML code for the image
echo "<img src=\"$file_name\" border=\"0\" />";
}
// This is all. Now there is some code for the demo
// seed with microseconds
function make_seed() {
list($usec, $sec) = explode(' ', microtime());
return (float) $sec + ((float) $usec * 100000);
}
// Data to show. Each $n index is one trace
$a_data = array();
for ($n = 0; $n < 5; $n ++) {
srand(make_seed());
$a_data[$n][0] = round(rand(0,100));
$a_data[$n][1] = round(rand(0,100));
$a_data[$n][2] = round(rand(0,100));
$a_data[$n][3] = round(rand(0,100));
$a_data[$n][4] = round(rand(0,100));
$a_data[$n][5] = round(rand(0,100));
$a_data[$n][6] = round(rand(0,100));
$a_data[$n][7] = round(rand(0,100));
$a_data[$n][8] = round(rand(0,100));
$a_data[$n][9] = round(rand(0,100));
$a_data[$n][10] = round(rand(0,100));
$a_data[$n][11] = round(rand(0,100));
}
// Horizontal indexes
$a_h_indexes[0] = "JAN";
$a_h_indexes[1] = "FEB";
$a_h_indexes[2] = "MAR";
$a_h_indexes[3] = "APR";
$a_h_indexes[4] = "MAY";
$a_h_indexes[5] = "JUN";
$a_h_indexes[6] = "JUL";
$a_h_indexes[7] = "AUG";
$a_h_indexes[8] = "SEP";
$a_h_indexes[9] = "OCT";
$a_h_indexes[10] = "NOV";
$a_h_indexes[11] = "DIC";
// Vertical indexes
$a_v_indexes[0] = 0;
$a_v_indexes[1] = 10;
$a_v_indexes[2] = 20;
$a_v_indexes[3] = 30;
$a_v_indexes[4] = 40;
$a_v_indexes[5] = 50;
$a_v_indexes[6] = 60;
$a_v_indexes[7] = 70;
$a_v_indexes[8] = 80;
$a_v_indexes[9] = 90;
$a_v_indexes[10] = 100;
// Colors array
$a_colors[0] = "000000";
$a_colors[1] = "6600FF";
$a_colors[2] = "FF0099";
$a_colors[3] = "33CC00";
$a_colors[4] = "CCCC00";
$a_colors[5] = "0000CC";
$a_colors[6] = "FFFF66";
$a_colors[7] = "006600";
$a_colors[8] = "00FFFF";
$a_colors[9] = "FFFFFF";
$a_colors[10] = "660033";
$a_colors[11] = "66FFCC";
?> | |
Usage Example
| <?php
graphic($a_data, $a_v_indexes, $a_h_indexes, $a_colors);
?> | |
|
|
| Create Thumbnails - resize an image - jpeg, jpg, gif, png to the specifed width and height in proportion without loosing out on pixcel quality.
Categories : PHP, GD image library, Graphics | | | PHP Email image generator - hide your email from bots - using the GD Library
Categories : PHP, Graphics, GD image library, Beginner Guides | | | Display a bar chart based on random values.
Categories : Graphics, PHP, GD image library, Charts and Graphs | | | Image Upload And Resize Script
Categories : PHP, Graphics, GD image library | | | Advanced Image WaterMarker
Categories : PHP, PHP Classes, GD image library, Graphics, Object Oriented | | | Simple PHP Bar Graph using GD library
Categories : PHP, GD image library, Graphics, Arrays | | | CAPTCHA[Image verification]
Categories : PHP, Security, GD image library, Graphics, Sessions | | | Simple class that uses GD to draw pie charts. After the class definition there's some sample code to demonstrate how you use the class.
Categories : Graphics, PHP, PHP Classes, GD image library, Charts and Graphs | | | A captcha image allows you to prevent spam posting when users reload the page and stop bots from submitting forms automatically. This version allows you to use your own fonts (.ttf) to show the text.
Categories : PHP, Security, Graphics, GD image library | | | imageMarker v 3.00 with new advanced features
Categories : PHP, PHP Classes, Graphics, GD image library | | | Image Generation Class ( PNG Format )
Categories : PHP, GD image library, PHP Classes, Graphics | | | PHP Image Compression using GD library
Categories : PHP, Compression, GD image library, Graphics | | | Generate image with random number (CAPTCHA)
Categories : PHP, GD image library, Graphics, Security | | | a simple pie-chart in php3 (with gd)
Categories : PHP, Graphics, GD image library, Charts and Graphs | | | crop and resize image class using gd library function
Categories : PHP, PHP Classes, GD image library, Graphics | |
|
|
|
