Gradient::SetNumColors() - Code Metrics - HuasoFoundries/jpgraph - Measure and Improve Code Quality continuously with Scrutinizer

Gradient::SetNumColors() A
last analyzed 2022-06-06 14:32 UTC

↳ Parent: Gradient

Complexity

Conditions	1
Paths	1

Size

Total Lines	3
Code Lines	1

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	0
CRAP Score	2

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
cc	1
eloc	1
nc	1
nop	1
dl	0
loc	3
ccs	0
cts	2
cp	0
crap	2
rs	10
c	1
b	0
f	0

<?php

/**
 * JPGraph v4.0.3
 */

namespace Amenadiel\JpGraph\Plot;

/*
 * File:        JPGRAPH_GRADIENT.PHP
 * // Description: Create a color gradient
 * // Created:     2003-02-01
 * // Ver:         $Id: jpgraph_gradient.php 1761 2009-08-01 08:31:28Z ljp $
 * //
 * // Copyright (c) Asial Corporation. All rights reserved.
 */
use Amenadiel\JpGraph\Util;

/**
 * @class Gradient
 * // Description: Handles gradient fills. This is to be
 * // considered a "friend" class of Class Image.
 */
class Gradient
{
    private $img;
    private $numcolors = 100;

    /**
     * CONSTRUCTOR.
     *
     * @param mixed $img
     */
    public function __construct(&$img)
    {
        $this->img = $img;
    }

    public function SetNumColors($aNum)
    {
        $this->numcolors = $aNum;
    }

    /**
     * PUBLIC METHODS.
     *
     * @param mixed $xl
     * @param mixed $yt
     * @param mixed $xr
     * @param mixed $yb
     * @param mixed $from_color
     * @param mixed $to_color
     * @param mixed $style
     */
    // Produce a gradient filled rectangle with a smooth transition between
    // two colors.
    // ($xl,$yt)  Top left corner
    // ($xr,$yb) Bottom right
    // $from_color Starting color in gradient
    // $to_color End color in the gradient
    // $style  Which way is the gradient oriented?
    public function FilledRectangle($xl, $yt, $xr, $yb, $from_color, $to_color, $style = 1)
    {
        $this->img->SetLineWeight(1);
        switch ($style) {
            case GRAD_VER:
                $steps = ceil(abs($xr - $xl) + 1);
                $delta = $xr >= $xl ? 1 : -1;
                $this->GetColArray($from_color, $to_color, $steps, $colors, $this->numcolors);
                for ($i = 0, $x = $xl; $i < $steps; ++$i) {
                    $this->img->current_color = $colors[$i];
                    $this->img->Line($x, $yt, $x, $yb);
                    $x += $delta;
                }

                break;
            case GRAD_HOR:
                $steps = ceil(abs($yb - $yt) + 1);
                $delta = $yb >= $yt ? 1 : -1;
                $this->GetColArray($from_color, $to_color, $steps, $colors, $this->numcolors);
                for ($i = 0, $y = $yt; $i < $steps; ++$i) {
                    $this->img->current_color = $colors[$i];
                    $this->img->Line($xl, $y, $xr, $y);
                    $y += $delta;
                }

                break;
            case GRAD_MIDHOR:
                $steps = ceil(abs($yb - $yt) / 2);
                $delta = $yb >= $yt ? 1 : -1;
                $this->GetColArray($from_color, $to_color, $steps, $colors, $this->numcolors);
                for ($y = $yt, $i = 0; $i < $steps; ++$i) {
                    $this->img->current_color = $colors[$i];
                    $this->img->Line($xl, $y, $xr, $y);
                    $y += $delta;
                }
                --$i;
                if (abs($yb - $yt) % 2 == 1) {
                    --$steps;
                }
                for ($j = 0; $j < $steps; ++$j, --$i) {
                    $this->img->current_color = $colors[$i];
                    $this->img->Line($xl, $y, $xr, $y);
                    $y += $delta;
                }
                $this->img->Line($xl, $y, $xr, $y);

                break;
            case GRAD_MIDVER:
                $steps = ceil(abs($xr - $xl) / 2);
                $delta = $xr >= $xl ? 1 : -1;
                $this->GetColArray($from_color, $to_color, $steps, $colors, $this->numcolors);
                for ($x = $xl, $i = 0; $i < $steps; ++$i) {
                    $this->img->current_color = $colors[$i];
                    $this->img->Line($x, $yb, $x, $yt);
                    $x += $delta;
                }
                --$i;
                if (abs($xr - $xl) % 2 == 1) {
                    --$steps;
                }
                for ($j = 0; $j < $steps; ++$j, --$i) {
                    $this->img->current_color = $colors[$i];
                    $this->img->Line($x, $yb, $x, $yt);
                    $x += $delta;
                }
                $this->img->Line($x, $yb, $x, $yt);

                break;
            case GRAD_WIDE_MIDVER:
                $diff      = ceil(abs($xr - $xl));
                $steps     = floor(abs($diff) / 3);
                $firststep = $diff - 2 * $steps;
                $delta     = $xr >= $xl ? 1 : -1;
                $this->GetColArray($from_color, $to_color, $firststep, $colors, $this->numcolors);
                for ($x = $xl, $i = 0; $i < $firststep; ++$i) {
                    $this->img->current_color = $colors[$i];
                    $this->img->Line($x, $yb, $x, $yt);
                    $x += $delta;
                }
                --$i;
                $this->img->current_color = $colors[$i];
                for ($j = 0; $j < $steps; ++$j) {
                    $this->img->Line($x, $yb, $x, $yt);
                    $x += $delta;
                }

                for ($j = 0; $j < $steps; ++$j, --$i) {
                    $this->img->current_color = $colors[$i];
                    $this->img->Line($x, $yb, $x, $yt);
                    $x += $delta;
                }

                break;
            case GRAD_WIDE_MIDHOR:
                $diff      = ceil(abs($yb - $yt));
                $steps     = floor(abs($diff) / 3);
                $firststep = $diff - 2 * $steps;
                $delta     = $yb >= $yt ? 1 : -1;
                $this->GetColArray($from_color, $to_color, $firststep, $colors, $this->numcolors);
                for ($y = $yt, $i = 0; $i < $firststep; ++$i) {
                    $this->img->current_color = $colors[$i];
                    $this->img->Line($xl, $y, $xr, $y);
                    $y += $delta;
                }
                --$i;
                $this->img->current_color = $colors[$i];
                for ($j = 0; $j < $steps; ++$j) {
                    $this->img->Line($xl, $y, $xr, $y);
                    $y += $delta;
                }
                for ($j = 0; $j < $steps; ++$j, --$i) {
                    $this->img->current_color = $colors[$i];
                    $this->img->Line($xl, $y, $xr, $y);
                    $y += $delta;
                }

                break;
            case GRAD_LEFT_REFLECTION:
                $steps1 = ceil(0.3 * abs($xr - $xl));
                $delta  = $xr >= $xl ? 1 : -1;

                $from_color  = $this->img->rgb->Color($from_color);
                $adj         = 1.4;
                $m           = ($adj - 1.0) * (255 - min(255, min($from_color[0], min($from_color[1], $from_color[2]))));
                $from_color2 = [min(255, $from_color[0] + $m),
                    min(255, $from_color[1] + $m), min(255, $from_color[2] + $m), ];

                $this->GetColArray($from_color2, $to_color, $steps1, $colors, $this->numcolors);
                $n = safe_count($colors);
                for ($x = $xl, $i = 0; $i < $steps1 && $i < $n; ++$i) {
                    $this->img->current_color = $colors[$i];
                    $this->img->Line($x, $yb, $x, $yt);
                    $x += $delta;
                }
                $steps2 = max(1, ceil(0.08 * abs($xr - $xl)));
                $this->img->SetColor($to_color);
                for ($j = 0; $j < $steps2; ++$j) {
                    $this->img->Line($x, $yb, $x, $yt);
                    $x += $delta;
                }
                $steps = abs($xr - $xl) - $steps1 - $steps2;
                $this->GetColArray($to_color, $from_color, $steps, $colors, $this->numcolors);
                $n = safe_count($colors);
                for ($i = 0; $i < $steps && $i < $n; ++$i) {
                    $this->img->current_color = $colors[$i];
                    $this->img->Line($x, $yb, $x, $yt);
                    $x += $delta;
                }

                break;
            case GRAD_RIGHT_REFLECTION:
                $steps1 = ceil(0.7 * abs($xr - $xl));
                $delta  = $xr >= $xl ? 1 : -1;

                $this->GetColArray($from_color, $to_color, $steps1, $colors, $this->numcolors);
                $n = safe_count($colors);
                for ($x = $xl, $i = 0; $i < $steps1 && $i < $n; ++$i) {
                    $this->img->current_color = $colors[$i];
                    $this->img->Line($x, $yb, $x, $yt);
                    $x += $delta;
                }
                $steps2 = max(1, ceil(0.08 * abs($xr - $xl)));
                $this->img->SetColor($to_color);
                for ($j = 0; $j < $steps2; ++$j) {
                    $this->img->Line($x, $yb, $x, $yt);
                    $x += $delta;
                }

                $from_color = $this->img->rgb->Color($from_color);
                $adj        = 1.4;
                $m          = ($adj - 1.0) * (255 - min(255, min($from_color[0], min($from_color[1], $from_color[2]))));
                $from_color = [min(255, $from_color[0] + $m),
                    min(255, $from_color[1] + $m), min(255, $from_color[2] + $m), ];

                $steps = abs($xr - $xl) - $steps1 - $steps2;
                $this->GetColArray($to_color, $from_color, $steps, $colors, $this->numcolors);
                $n = safe_count($colors);
                for ($i = 0; $i < $steps && $i < $n; ++$i) {
                    $this->img->current_color = $colors[$i];
                    $this->img->Line($x, $yb, $x, $yt);
                    $x += $delta;
                }

                break;
            case GRAD_CENTER:
                $steps = ceil(min(($yb - $yt) + 1, ($xr - $xl) + 1) / 2);
                $this->GetColArray($from_color, $to_color, $steps, $colors, $this->numcolors);
                $dx = ($xr - $xl) / 2;
                $dy = ($yb - $yt) / 2;
                $x  = $xl;

                $y  = $yt;
                $x2 = $xr;
                $y2 = $yb;
                $n  = safe_count($colors);
                for ($x = $xl, $i = 0; $x < $xl + $dx && $y < $yt + $dy && $i < $n; ++$x, ++$y, --$x2, --$y2, ++$i) {
                    $this->img->current_color = $colors[$i];
                    $this->img->Rectangle($x, $y, $x2, $y2);
                }
                $this->img->Line($x, $y, $x2, $y2);

                break;
            case GRAD_RAISED_PANEL:
                // right to left
                $steps1 = $xr - $xl;
                $delta  = $xr >= $xl ? 1 : -1;
                $this->GetColArray($to_color, $from_color, $steps1, $colors, $this->numcolors);
                $n = safe_count($colors);
                for ($x = $xl, $i = 0; $i < $steps1 && $i < $n; ++$i) {
                    $this->img->current_color = $colors[$i];
                    $this->img->Line($x, $yb, $x, $yt);
                    $x += $delta;
                }

                // left to right
                $xr -= 3;
                $xl += 3;
                $yb -= 3;
                $yt += 3;
                $steps2 = $xr - $xl;
                $delta  = $xr >= $xl ? 1 : -1;
                for ($x = $xl, $j = $steps2; $j >= 0; --$j) {
                    $this->img->current_color = $colors[$j];
                    $this->img->Line($x, $yb, $x, $yt);
                    $x += $delta;
                }

                break;
            case GRAD_DIAGONAL:
                // use the longer dimension to determine the required number of steps.
                // first loop draws from one corner to the mid-diagonal and the second
                // loop draws from the mid-diagonal to the opposing corner.
                if ($xr - $xl > $yb - $yt) {
                    // width is greater than height -> use x-dimension for steps
                    $steps = $xr - $xl;
                    $delta = $xr >= $xl ? 1 : -1;
                    $this->GetColArray($from_color, $to_color, $steps * 2, $colors, $this->numcolors);
                    $n = safe_count($colors);

                    for ($x = $xl, $i = 0; $i < $steps && $i < $n; ++$i) {
                        $this->img->current_color = $colors[$i];
                        $y                        = $yt + ($i / $steps) * ($yb - $yt) * $delta;
                        $this->img->Line($x, $yt, $xl, $y);
                        $x += $delta;
                    }

                    for ($x = $xl, $i = 0; $i < $steps && $i < $n; ++$i) {
                        $this->img->current_color = $colors[$steps + $i];
                        $y                        = $yt + ($i / $steps) * ($yb - $yt) * $delta;
                        $this->img->Line($x, $yb, $xr, $y);
                        $x += $delta;
                    }
                } else {
                    // height is greater than width -> use y-dimension for steps
                    $steps = $yb - $yt;
                    $delta = $yb >= $yt ? 1 : -1;
                    $this->GetColArray($from_color, $to_color, $steps * 2, $colors, $this->numcolors);
                    $n = safe_count($colors);

                    for ($y = $yt, $i = 0; $i < $steps && $i < $n; ++$i) {
                        $this->img->current_color = $colors[$i];
                        $x                        = $xl + ($i / $steps) * ($xr - $xl) * $delta;
                        $this->img->Line($x, $yt, $xl, $y);
                        $y += $delta;
                    }

                    for ($y = $yt, $i = 0; $i < $steps && $i < $n; ++$i) {
                        $this->img->current_color = $colors[$steps + $i];
                        $x                        = $xl + ($i / $steps) * ($xr - $xl) * $delta;
                        $this->img->Line($x, $yb, $xr, $y);
                        $x += $delta;
                    }
                }

                break;
            default:
                Util\JpGraphError::RaiseL(7001, $style);
                //("Unknown gradient style (=$style).");
                break;
        }
    }

    // Fill a special case of a polygon with a flat bottom
    // with a gradient. Can be used for filled line plots.
    // Please note that this is NOT a generic gradient polygon fill
    // routine. It assumes that the bottom is flat (like a drawing
    // of a mountain)
    public function FilledFlatPolygon($pts, $from_color, $to_color)
    {
        if (safe_count($pts) == 0) {
            return;
        }

        $maxy = $pts[1];
        $miny = $pts[1];
        $n    = safe_count($pts);
        for ($i = 0, $idx = 0; $i < $n; $i += 2) {

            $x    = round($pts[$i]);

            $y    = round($pts[$i + 1]);
            $miny = min($miny, $y);
            $maxy = max($maxy, $y);
        }

        $colors = [];
        $this->GetColArray($from_color, $to_color, abs($maxy - $miny) + 1, $colors, $this->numcolors);
        for ($i = $miny, $idx = 0; $i <= $maxy; ++$i) {
            $colmap[$i] = $colors[$idx++];
        }

        $n   = safe_count($pts) / 2;
        $idx = 0;
        while ($idx < $n - 1) {
            $p1 = [round($pts[$idx * 2]), round($pts[$idx * 2 + 1])];
            $p2 = [round($pts[++$idx * 2]), round($pts[$idx * 2 + 1])];

            // Find the largest rectangle we can fill
            $y = max($p1[1], $p2[1]);
            for ($yy = $maxy; $yy > $y; --$yy) {
                $this->img->current_color = $colmap[$yy];

                $this->img->Line($p1[0], $yy, $p2[0] - 1, $yy);
            }

            if ($p1[1] == $p2[1]) {
                continue;
            }

            // Fill the rest using lines (slow...)
            $slope = ($p2[0] - $p1[0]) / ($p1[1] - $p2[1]);
            $x1    = $p1[0];
            $x2    = $p2[0] - 1;
            $start = $y;
            if ($p1[1] > $p2[1]) {
                while ($y >= $p2[1]) {
                    $x1                       = $slope * ($start - $y) + $p1[0];
                    $this->img->current_color = $colmap[$y];
                    $this->img->Line($x1, $y, $x2, $y);
                    --$y;
                }
            } else {
                while ($y >= $p1[1]) {
                    $x2                       = $p2[0] + $slope * ($start - $y);
                    $this->img->current_color = $colmap[$y];
                    $this->img->Line($x1, $y, $x2, $y);
                    --$y;
                }
            }
        }
    }

    /**
     * PRIVATE METHODS.
     *
     * @param mixed $from_color
     * @param mixed $to_color
     * @param mixed $arr_size
     * @param mixed $numcols
     * @param mixed $colors
     */
    // Add to the image color map the necessary colors to do the transition
    // between the two colors using $numcolors intermediate colors
    public function GetColArray($from_color, $to_color, $arr_size, &$colors, $numcols = 100)
    {
        if ($arr_size == 0) {
            return;
        }

        // If color is given as text get it's corresponding r,g,b values
        $from_color = $this->img->rgb->Color($from_color);
        $to_color   = $this->img->rgb->Color($to_color);

        $rdelta        = ($to_color[0] - $from_color[0]) / $numcols;
        $gdelta        = ($to_color[1] - $from_color[1]) / $numcols;
        $bdelta        = ($to_color[2] - $from_color[2]) / $numcols;
        $colorsperstep = $numcols / $arr_size;
        $prevcolnum    = -1;
        $from_alpha    = $from_color[3];
        $to_alpha      = $to_color[3];
        $adelta        = ($to_alpha - $from_alpha) / $numcols;

        for ($i = 0; $i < $arr_size; ++$i) {
            $colnum = floor($colorsperstep * $i);
            if ($colnum == $prevcolnum) {
                $colors[$i] = $colidx;

            } else {
                $r     = floor($from_color[0] + $colnum * $rdelta);
                $g     = floor($from_color[1] + $colnum * $gdelta);
                $b     = floor($from_color[2] + $colnum * $bdelta);
                $alpha = $from_alpha + $colnum * $adelta;

                $colidx     = $this->img->rgb->Allocate(sprintf('#%02x%02x%02x', $r, $g, $b), $alpha);
                $colors[$i] = $colidx;
            }
            $prevcolnum = $colnum;
        }
    }
} // @class


1		<?php
2
3		/**
4		* JPGraph v4.0.3
5		*/
6
7		namespace Amenadiel\JpGraph\Plot;
8
9		/*
10		* File: JPGRAPH_GRADIENT.PHP
11		* // Description: Create a color gradient
12		* // Created: 2003-02-01
13		* // Ver: $Id: jpgraph_gradient.php 1761 2009-08-01 08:31:28Z ljp $
14		* //
15		* // Copyright (c) Asial Corporation. All rights reserved.
16		*/
17		use Amenadiel\JpGraph\Util;
18
19		/**
20		* @class Gradient
21		* // Description: Handles gradient fills. This is to be
22		* // considered a "friend" class of Class Image.
23		*/
24		class Gradient
25		{
26		private $img;
27		private $numcolors = 100;
28
29		/**
30		* CONSTRUCTOR.
31		*
32		* @param mixed $img
33		*/
34	15	public function __construct(&$img)
35		{
36	15	$this->img = $img;
37	15	}
38
39		public function SetNumColors($aNum)
40		{
41		$this->numcolors = $aNum;
42		}
43
44		/**
45		* PUBLIC METHODS.
46		*
47		* @param mixed $xl
48		* @param mixed $yt
49		* @param mixed $xr
50		* @param mixed $yb
51		* @param mixed $from_color
52		* @param mixed $to_color
53		* @param mixed $style
54		*/
55		// Produce a gradient filled rectangle with a smooth transition between
56		// two colors.
57		// ($xl,$yt) Top left corner
58		// ($xr,$yb) Bottom right
59		// $from_color Starting color in gradient
60		// $to_color End color in the gradient
61		// $style Which way is the gradient oriented?
62	3	public function FilledRectangle($xl, $yt, $xr, $yb, $from_color, $to_color, $style = 1)
63		{
64	3	$this->img->SetLineWeight(1);
65		switch ($style) {
66	3	case GRAD_VER:
67		$steps = ceil(abs($xr - $xl) + 1);
68		$delta = $xr >= $xl ? 1 : -1;
69		$this->GetColArray($from_color, $to_color, $steps, $colors, $this->numcolors);
70		for ($i = 0, $x = $xl; $i < $steps; ++$i) {
71		$this->img->current_color = $colors[$i];
72		$this->img->Line($x, $yt, $x, $yb);
73		$x += $delta;
74		}
75
76		break;
77	3	case GRAD_HOR:
78	3	$steps = ceil(abs($yb - $yt) + 1);
79	3	$delta = $yb >= $yt ? 1 : -1;
80	3	$this->GetColArray($from_color, $to_color, $steps, $colors, $this->numcolors);
81	3	for ($i = 0, $y = $yt; $i < $steps; ++$i) {
82	3	$this->img->current_color = $colors[$i];
83	3	$this->img->Line($xl, $y, $xr, $y);
84	3	$y += $delta;
85		}
86
87	3	break;
88		case GRAD_MIDHOR:
89		$steps = ceil(abs($yb - $yt) / 2);
90		$delta = $yb >= $yt ? 1 : -1;
91		$this->GetColArray($from_color, $to_color, $steps, $colors, $this->numcolors);
92		for ($y = $yt, $i = 0; $i < $steps; ++$i) {
93		$this->img->current_color = $colors[$i];
94		$this->img->Line($xl, $y, $xr, $y);
95		$y += $delta;
96		}
97		--$i;
98		if (abs($yb - $yt) % 2 == 1) {
99		--$steps;
100		}
101		for ($j = 0; $j < $steps; ++$j, --$i) {
102		$this->img->current_color = $colors[$i];
103		$this->img->Line($xl, $y, $xr, $y);
104		$y += $delta;
105		}
106		$this->img->Line($xl, $y, $xr, $y);
107
108		break;
109		case GRAD_MIDVER:
110		$steps = ceil(abs($xr - $xl) / 2);
111		$delta = $xr >= $xl ? 1 : -1;
112		$this->GetColArray($from_color, $to_color, $steps, $colors, $this->numcolors);
113		for ($x = $xl, $i = 0; $i < $steps; ++$i) {
114		$this->img->current_color = $colors[$i];
115		$this->img->Line($x, $yb, $x, $yt);
116		$x += $delta;
117		}
118		--$i;
119		if (abs($xr - $xl) % 2 == 1) {
120		--$steps;
121		}
122		for ($j = 0; $j < $steps; ++$j, --$i) {
123		$this->img->current_color = $colors[$i];
124		$this->img->Line($x, $yb, $x, $yt);
125		$x += $delta;
126		}
127		$this->img->Line($x, $yb, $x, $yt);
128
129		break;
130		case GRAD_WIDE_MIDVER:
131		$diff = ceil(abs($xr - $xl));
132		$steps = floor(abs($diff) / 3);
133		$firststep = $diff - 2 * $steps;
134		$delta = $xr >= $xl ? 1 : -1;
135		$this->GetColArray($from_color, $to_color, $firststep, $colors, $this->numcolors);
136		for ($x = $xl, $i = 0; $i < $firststep; ++$i) {
137		$this->img->current_color = $colors[$i];
138		$this->img->Line($x, $yb, $x, $yt);
139		$x += $delta;
140		}
141		--$i;
142		$this->img->current_color = $colors[$i];
143		for ($j = 0; $j < $steps; ++$j) {
144		$this->img->Line($x, $yb, $x, $yt);
145		$x += $delta;
146		}
147
148		for ($j = 0; $j < $steps; ++$j, --$i) {
149		$this->img->current_color = $colors[$i];
150		$this->img->Line($x, $yb, $x, $yt);
151		$x += $delta;
152		}
153
154		break;
155		case GRAD_WIDE_MIDHOR:
156		$diff = ceil(abs($yb - $yt));
157		$steps = floor(abs($diff) / 3);
158		$firststep = $diff - 2 * $steps;
159		$delta = $yb >= $yt ? 1 : -1;
160		$this->GetColArray($from_color, $to_color, $firststep, $colors, $this->numcolors);
161		for ($y = $yt, $i = 0; $i < $firststep; ++$i) {
162		$this->img->current_color = $colors[$i];
163		$this->img->Line($xl, $y, $xr, $y);
164		$y += $delta;
165		}
166		--$i;
167		$this->img->current_color = $colors[$i];
168		for ($j = 0; $j < $steps; ++$j) {
169		$this->img->Line($xl, $y, $xr, $y);
170		$y += $delta;
171		}
172		for ($j = 0; $j < $steps; ++$j, --$i) {
173		$this->img->current_color = $colors[$i];
174		$this->img->Line($xl, $y, $xr, $y);
175		$y += $delta;
176		}
177
178		break;
179		case GRAD_LEFT_REFLECTION:
180		$steps1 = ceil(0.3 * abs($xr - $xl));
181		$delta = $xr >= $xl ? 1 : -1;
182
183		$from_color = $this->img->rgb->Color($from_color);
184		$adj = 1.4;
185		$m = ($adj - 1.0) * (255 - min(255, min($from_color[0], min($from_color[1], $from_color[2]))));
186		$from_color2 = [min(255, $from_color[0] + $m),
187		min(255, $from_color[1] + $m), min(255, $from_color[2] + $m), ];
188
189		$this->GetColArray($from_color2, $to_color, $steps1, $colors, $this->numcolors);
190		$n = safe_count($colors);
191		for ($x = $xl, $i = 0; $i < $steps1 && $i < $n; ++$i) {
192		$this->img->current_color = $colors[$i];
193		$this->img->Line($x, $yb, $x, $yt);
194		$x += $delta;
195		}
196		$steps2 = max(1, ceil(0.08 * abs($xr - $xl)));
197		$this->img->SetColor($to_color);
198		for ($j = 0; $j < $steps2; ++$j) {
199		$this->img->Line($x, $yb, $x, $yt);
200		$x += $delta;
201		}
202		$steps = abs($xr - $xl) - $steps1 - $steps2;
203		$this->GetColArray($to_color, $from_color, $steps, $colors, $this->numcolors);
204		$n = safe_count($colors);
205		for ($i = 0; $i < $steps && $i < $n; ++$i) {
206		$this->img->current_color = $colors[$i];
207		$this->img->Line($x, $yb, $x, $yt);
208		$x += $delta;
209		}
210
211		break;
212		case GRAD_RIGHT_REFLECTION:
213		$steps1 = ceil(0.7 * abs($xr - $xl));
214		$delta = $xr >= $xl ? 1 : -1;
215
216		$this->GetColArray($from_color, $to_color, $steps1, $colors, $this->numcolors);
217		$n = safe_count($colors);
218		for ($x = $xl, $i = 0; $i < $steps1 && $i < $n; ++$i) {
219		$this->img->current_color = $colors[$i];
220		$this->img->Line($x, $yb, $x, $yt);
221		$x += $delta;
222		}
223		$steps2 = max(1, ceil(0.08 * abs($xr - $xl)));
224		$this->img->SetColor($to_color);
225		for ($j = 0; $j < $steps2; ++$j) {
226		$this->img->Line($x, $yb, $x, $yt);
227		$x += $delta;
228		}
229
230		$from_color = $this->img->rgb->Color($from_color);
231		$adj = 1.4;
232		$m = ($adj - 1.0) * (255 - min(255, min($from_color[0], min($from_color[1], $from_color[2]))));
233		$from_color = [min(255, $from_color[0] + $m),
234		min(255, $from_color[1] + $m), min(255, $from_color[2] + $m), ];
235
236		$steps = abs($xr - $xl) - $steps1 - $steps2;
237		$this->GetColArray($to_color, $from_color, $steps, $colors, $this->numcolors);
238		$n = safe_count($colors);
239		for ($i = 0; $i < $steps && $i < $n; ++$i) {
240		$this->img->current_color = $colors[$i];
241		$this->img->Line($x, $yb, $x, $yt);
242		$x += $delta;
243		}
244
245		break;
246		case GRAD_CENTER:
247		$steps = ceil(min(($yb - $yt) + 1, ($xr - $xl) + 1) / 2);
248		$this->GetColArray($from_color, $to_color, $steps, $colors, $this->numcolors);
249		$dx = ($xr - $xl) / 2;
250		$dy = ($yb - $yt) / 2;
251		$x = $xl;
		0 ignored issues – show Unused Code introduced 2017-10-09 01:07 UTC by Report Bug Copy Issue Report The assignment to `$x` is dead and can be removed. Loading history...
252		$y = $yt;
253		$x2 = $xr;
254		$y2 = $yb;
255		$n = safe_count($colors);
256		for ($x = $xl, $i = 0; $x < $xl + $dx && $y < $yt + $dy && $i < $n; ++$x, ++$y, --$x2, --$y2, ++$i) {
257		$this->img->current_color = $colors[$i];
258		$this->img->Rectangle($x, $y, $x2, $y2);
259		}
260		$this->img->Line($x, $y, $x2, $y2);
261
262		break;
263		case GRAD_RAISED_PANEL:
264		// right to left
265		$steps1 = $xr - $xl;
266		$delta = $xr >= $xl ? 1 : -1;
267		$this->GetColArray($to_color, $from_color, $steps1, $colors, $this->numcolors);
268		$n = safe_count($colors);
269		for ($x = $xl, $i = 0; $i < $steps1 && $i < $n; ++$i) {
270		$this->img->current_color = $colors[$i];
271		$this->img->Line($x, $yb, $x, $yt);
272		$x += $delta;
273		}
274
275		// left to right
276		$xr -= 3;
277		$xl += 3;
278		$yb -= 3;
279		$yt += 3;
280		$steps2 = $xr - $xl;
281		$delta = $xr >= $xl ? 1 : -1;
282		for ($x = $xl, $j = $steps2; $j >= 0; --$j) {
283		$this->img->current_color = $colors[$j];
284		$this->img->Line($x, $yb, $x, $yt);
285		$x += $delta;
286		}
287
288		break;
289		case GRAD_DIAGONAL:
290		// use the longer dimension to determine the required number of steps.
291		// first loop draws from one corner to the mid-diagonal and the second
292		// loop draws from the mid-diagonal to the opposing corner.
293		if ($xr - $xl > $yb - $yt) {
294		// width is greater than height -> use x-dimension for steps
295		$steps = $xr - $xl;
296		$delta = $xr >= $xl ? 1 : -1;
297		$this->GetColArray($from_color, $to_color, $steps * 2, $colors, $this->numcolors);
298		$n = safe_count($colors);
299
300		for ($x = $xl, $i = 0; $i < $steps && $i < $n; ++$i) {
301		$this->img->current_color = $colors[$i];
302		$y = $yt + ($i / $steps) * ($yb - $yt) * $delta;
303		$this->img->Line($x, $yt, $xl, $y);
304		$x += $delta;
305		}
306
307		for ($x = $xl, $i = 0; $i < $steps && $i < $n; ++$i) {
308		$this->img->current_color = $colors[$steps + $i];
309		$y = $yt + ($i / $steps) * ($yb - $yt) * $delta;
310		$this->img->Line($x, $yb, $xr, $y);
311		$x += $delta;
312		}
313		} else {
314		// height is greater than width -> use y-dimension for steps
315		$steps = $yb - $yt;
316		$delta = $yb >= $yt ? 1 : -1;
317		$this->GetColArray($from_color, $to_color, $steps * 2, $colors, $this->numcolors);
318		$n = safe_count($colors);
319
320		for ($y = $yt, $i = 0; $i < $steps && $i < $n; ++$i) {
321		$this->img->current_color = $colors[$i];
322		$x = $xl + ($i / $steps) * ($xr - $xl) * $delta;
323		$this->img->Line($x, $yt, $xl, $y);
324		$y += $delta;
325		}
326
327		for ($y = $yt, $i = 0; $i < $steps && $i < $n; ++$i) {
328		$this->img->current_color = $colors[$steps + $i];
329		$x = $xl + ($i / $steps) * ($xr - $xl) * $delta;
330		$this->img->Line($x, $yb, $xr, $y);
331		$x += $delta;
332		}
333		}
334
335		break;
336		default:
337		Util\JpGraphError::RaiseL(7001, $style);
338		//("Unknown gradient style (=$style).");
339		break;
340		}
341	3	}
342
343		// Fill a special case of a polygon with a flat bottom
344		// with a gradient. Can be used for filled line plots.
345		// Please note that this is NOT a generic gradient polygon fill
346		// routine. It assumes that the bottom is flat (like a drawing
347		// of a mountain)
348		public function FilledFlatPolygon($pts, $from_color, $to_color)
349		{
350		if (safe_count($pts) == 0) {
351		return;
352		}
353
354		$maxy = $pts[1];
355		$miny = $pts[1];
356		$n = safe_count($pts);
357		for ($i = 0, $idx = 0; $i < $n; $i += 2) {
		0 ignored issues – show Unused Code introduced 2017-10-09 01:07 UTC by Report Bug Copy Issue Report The assignment to `$idx` is dead and can be removed. Loading history...
358		$x = round($pts[$i]);
		0 ignored issues – show Unused Code introduced 2017-10-09 01:07 UTC by Report Bug Copy Issue Report The assignment to `$x` is dead and can be removed. Loading history...
359		$y = round($pts[$i + 1]);
360		$miny = min($miny, $y);
361		$maxy = max($maxy, $y);
362		}
363
364		$colors = [];
365		$this->GetColArray($from_color, $to_color, abs($maxy - $miny) + 1, $colors, $this->numcolors);
366		for ($i = $miny, $idx = 0; $i <= $maxy; ++$i) {
367		$colmap[$i] = $colors[$idx++];
368		}
369
370		$n = safe_count($pts) / 2;
371		$idx = 0;
372		while ($idx < $n - 1) {
373		$p1 = [round($pts[$idx * 2]), round($pts[$idx * 2 + 1])];
374		$p2 = [round($pts[++$idx * 2]), round($pts[$idx * 2 + 1])];
375
376		// Find the largest rectangle we can fill
377		$y = max($p1[1], $p2[1]);
378		for ($yy = $maxy; $yy > $y; --$yy) {
379		$this->img->current_color = $colmap[$yy];
		0 ignored issues – show Comprehensibility Best Practice introduced 2017-10-09 01:07 UTC by Report Bug Copy Issue Report The variable `$colmap` does not seem to be defined for all execution paths leading up to this point. Loading history...
380		$this->img->Line($p1[0], $yy, $p2[0] - 1, $yy);
381		}
382
383		if ($p1[1] == $p2[1]) {
384		continue;
385		}
386
387		// Fill the rest using lines (slow...)
388		$slope = ($p2[0] - $p1[0]) / ($p1[1] - $p2[1]);
389		$x1 = $p1[0];
390		$x2 = $p2[0] - 1;
391		$start = $y;
392		if ($p1[1] > $p2[1]) {
393		while ($y >= $p2[1]) {
394		$x1 = $slope * ($start - $y) + $p1[0];
395		$this->img->current_color = $colmap[$y];
396		$this->img->Line($x1, $y, $x2, $y);
397		--$y;
398		}
399		} else {
400		while ($y >= $p1[1]) {
401		$x2 = $p2[0] + $slope * ($start - $y);
402		$this->img->current_color = $colmap[$y];
403		$this->img->Line($x1, $y, $x2, $y);
404		--$y;
405		}
406		}
407		}
408		}
409
410		/**
411		* PRIVATE METHODS.
412		*
413		* @param mixed $from_color
414		* @param mixed $to_color
415		* @param mixed $arr_size
416		* @param mixed $numcols
417		* @param mixed $colors
418		*/
419		// Add to the image color map the necessary colors to do the transition
420		// between the two colors using $numcolors intermediate colors
421	3	public function GetColArray($from_color, $to_color, $arr_size, &$colors, $numcols = 100)
422		{
423	3	if ($arr_size == 0) {
424		return;
425		}
426
427		// If color is given as text get it's corresponding r,g,b values
428	3	$from_color = $this->img->rgb->Color($from_color);
429	3	$to_color = $this->img->rgb->Color($to_color);
430
431	3	$rdelta = ($to_color[0] - $from_color[0]) / $numcols;
432	3	$gdelta = ($to_color[1] - $from_color[1]) / $numcols;
433	3	$bdelta = ($to_color[2] - $from_color[2]) / $numcols;
434	3	$colorsperstep = $numcols / $arr_size;
435	3	$prevcolnum = -1;
436	3	$from_alpha = $from_color[3];
437	3	$to_alpha = $to_color[3];
438	3	$adelta = ($to_alpha - $from_alpha) / $numcols;
439
440	3	for ($i = 0; $i < $arr_size; ++$i) {
441	3	$colnum = floor($colorsperstep * $i);
442	3	if ($colnum == $prevcolnum) {
443	3	$colors[$i] = $colidx;
		0 ignored issues – show Comprehensibility Best Practice introduced 2017-10-09 01:07 UTC by Report Bug Copy Issue Report The variable `$colidx` does not seem to be defined for all execution paths leading up to this point. Loading history...
444		} else {
445	3	$r = floor($from_color[0] + $colnum * $rdelta);
446	3	$g = floor($from_color[1] + $colnum * $gdelta);
447	3	$b = floor($from_color[2] + $colnum * $bdelta);
448	3	$alpha = $from_alpha + $colnum * $adelta;
449
450	3	$colidx = $this->img->rgb->Allocate(sprintf('#%02x%02x%02x', $r, $g, $b), $alpha);
451	3	$colors[$i] = $colidx;
452		}
453	3	$prevcolnum = $colnum;
454		}
455	3	}
456		} // @class
457

HuasoFoundries / jpgraph

Gradient::SetNumColors() A last analyzed 2022-06-06 14:32 UTC

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Gradient::SetNumColors() A
last analyzed 2022-06-06 14:32 UTC