<?php

//============================================================+
// File name   : example_030.php
// Begin       : 2008-06-09
// Last Update : 2013-05-14
//
// Description : Example 030 for TCPDF class
//               Colour gradients
//
// Author: Nicola Asuni
//
// (c) Copyright:
//               Nicola Asuni
//               Tecnick.com LTD
//               www.tecnick.com
//               info@tecnick.com
//============================================================+

/**
 * Creates an example PDF TEST document using TCPDF
 * @package com.tecnick.tcpdf
 * @abstract TCPDF - Example: Colour gradients
 * @author Nicola Asuni
 * @since 2008-06-09
 * @group color
 * @group pdf
 */

// Include the main TCPDF library (search for installation path).
require_once 'tcpdf_include.php';

// create new PDF document
$pdf = new TCPDF(PDF_PAGE_ORIENTATION, PDF_UNIT, PDF_PAGE_FORMAT, true, 'UTF-8', false);

// set document information
$pdf->setCreator(PDF_CREATOR);
$pdf->setAuthor('Nicola Asuni');
$pdf->setTitle('TCPDF Example 030');
$pdf->setSubject('TCPDF Tutorial');
$pdf->setKeywords('TCPDF, PDF, example, test, guide');

// set default header data
$pdf->setHeaderData(PDF_HEADER_LOGO, PDF_HEADER_LOGO_WIDTH, PDF_HEADER_TITLE . ' 030', PDF_HEADER_STRING);

// set header and footer fonts
$pdf->setHeaderFont([PDF_FONT_NAME_MAIN, '', PDF_FONT_SIZE_MAIN]);
$pdf->setFooterFont([PDF_FONT_NAME_DATA, '', PDF_FONT_SIZE_DATA]);

// set default monospaced font
$pdf->setDefaultMonospacedFont(PDF_FONT_MONOSPACED);

// set margins
$pdf->setMargins(PDF_MARGIN_LEFT, PDF_MARGIN_TOP, PDF_MARGIN_RIGHT);
$pdf->setHeaderMargin(PDF_MARGIN_HEADER);
$pdf->setFooterMargin(PDF_MARGIN_FOOTER);

// set auto page breaks
$pdf->setAutoPageBreak(true, PDF_MARGIN_BOTTOM);

// set image scale factor
$pdf->setImageScale(PDF_IMAGE_SCALE_RATIO);

// set some language-dependent strings (optional)
if (@file_exists(dirname(__FILE__) . '/lang/eng.php')) {
    require_once dirname(__FILE__) . '/lang/eng.php';
    $pdf->setLanguageArray($l);
}

// ---------------------------------------------------------

// set font
$pdf->setFont('helvetica', 'B', 20);

// --- first page ------------------------------------------

// add a page
$pdf->AddPage();

$pdf->Cell(0, 0, 'TCPDF Gradients', 0, 1, 'C', 0, '', 0, false, 'T', 'M');

// set colors for gradients (r,g,b) or (grey 0-255)
$red = [255, 0, 0];
$blue = [0, 0, 200];
$yellow = [255, 255, 0];
$green = [0, 255, 0];
$white = [255];
$black = [0];

// set the coordinates x1,y1,x2,y2 of the gradient (see linear_gradient_coords.jpg)
$coords = [0, 0, 1, 0];

// paint a linear gradient
$pdf->LinearGradient(20, 45, 80, 80, $red, $blue, $coords);

// write label
$pdf->Text(20, 130, 'LinearGradient()');

// set the coordinates fx,fy,cx,cy,r of the gradient (see radial_gradient_coords.jpg)
$coords = [0.5, 0.5, 1, 1, 1.2];

// paint a radial gradient
$pdf->RadialGradient(110, 45, 80, 80, $white, $black, $coords);

// write label
$pdf->Text(110, 130, 'RadialGradient()');

// paint a coons patch mesh with default coordinates
$pdf->CoonsPatchMesh(20, 155, 80, 80, $yellow, $blue, $green, $red);

// write label
$pdf->Text(20, 240, 'CoonsPatchMesh()');

// set the coordinates for the cubic Bézier points x1,y1 ... x12, y12 of the patch (see coons_patch_mesh_coords.jpg)
$coords = [
    0.00,
    0.00,
    0.33,
    0.20, //lower left
    0.67,
    0.00,
    1.00,
    0.00,
    0.80,
    0.33, //lower right
    0.80,
    0.67,
    1.00,
    1.00,
    0.67,
    0.80, //upper right
    0.33,
    1.00,
    0.00,
    1.00,
    0.20,
    0.67, //upper left
    0.00,
    0.33,
]; //lower left
$coords_min = 0; //minimum value of the coordinates
$coords_max = 1; //maximum value of the coordinates

// paint a coons patch gradient with the above coordinates
$pdf->CoonsPatchMesh(110, 155, 80, 80, $yellow, $blue, $green, $red, $coords, $coords_min, $coords_max);

// write label
$pdf->Text(110, 240, 'CoonsPatchMesh()');

// --- second page -----------------------------------------
$pdf->AddPage();

// first patch: f = 0
$patch_array[0]['f'] = 0;
$patch_array[0]['points'] = [
    0.00,
    0.00,
    0.33,
    0.00,
    0.67,
    0.00,
    1.00,
    0.00,
    1.00,
    0.33,
    0.8,
    0.67,
    1.00,
    1.00,
    0.67,
    0.8,
    0.33,
    1.80,
    0.00,
    1.00,
    0.00,
    0.67,
    0.00,
    0.33,
];
$patch_array[0]['colors'][0] = ['r' => 255, 'g' => 255, 'b' => 0];
$patch_array[0]['colors'][1] = ['r' => 0, 'g' => 0, 'b' => 255];
$patch_array[0]['colors'][2] = ['r' => 0, 'g' => 255, 'b' => 0];
$patch_array[0]['colors'][3] = ['r' => 255, 'g' => 0, 'b' => 0];

// second patch - above the other: f = 2
$patch_array[1]['f'] = 2;
$patch_array[1]['points'] = [
    0.00,
    1.33,
    0.00,
    1.67,
    0.00,
    2.00,
    0.33,
    2.00,
    0.67,
    2.00,
    1.00,
    2.00,
    1.00,
    1.67,
    1.5,
    1.33,
];
$patch_array[1]['colors'][0] = ['r' => 0, 'g' => 0, 'b' => 0];
$patch_array[1]['colors'][1] = ['r' => 255, 'g' => 0, 'b' => 255];

// third patch - right of the above: f = 3
$patch_array[2]['f'] = 3;
$patch_array[2]['points'] = [
    1.33,
    0.80,
    1.67,
    1.50,
    2.00,
    1.00,
    2.00,
    1.33,
    2.00,
    1.67,
    2.00,
    2.00,
    1.67,
    2.00,
    1.33,
    2.00,
];
$patch_array[2]['colors'][0] = ['r' => 0, 'g' => 255, 'b' => 255];
$patch_array[2]['colors'][1] = ['r' => 0, 'g' => 0, 'b' => 0];

// fourth patch - below the above, which means left(?) of the above: f = 1
$patch_array[3]['f'] = 1;
$patch_array[3]['points'] = [
    2.00,
    0.67,
    2.00,
    0.33,
    2.00,
    0.00,
    1.67,
    0.00,
    1.33,
    0.00,
    1.00,
    0.00,
    1.00,
    0.33,
    0.8,
    0.67,
];
$patch_array[3]['colors'][0] = ['r' => 0, 'g' => 0, 'b' => 0];
$patch_array[3]['colors'][1] = ['r' => 0, 'g' => 0, 'b' => 255];

$coords_min = 0;
$coords_max = 2;

$pdf->CoonsPatchMesh(10, 45, 190, 200, '', '', '', '', $patch_array, $coords_min, $coords_max);

// write label
$pdf->Text(10, 250, 'CoonsPatchMesh()');

// ---------------------------------------------------------

//Close and output PDF document
$pdf->Output('example_030.pdf', 'D');