jimIcon::get_color() - Code Metrics - codysnider/tt-rss - Measure and Improve Code Quality continuously with Scrutinizer

jimIcon::get_color() A
last analyzed 2019-12-23 07:25 UTC

↳ Parent: jimIcon

Complexity

Conditions	5
Paths	6

Size

Total Lines	16
Code Lines	12

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	5
eloc	12
c	0
b	0
f	0
nc	6
nop	2
dl	0
loc	16
rs	9.5555

<?php

// Simple .ICO parsing.  The ICO format is insanely complex and this may
// fail to correctly handle some technically valid files, but it works
// on the majority I've found.
//
// jimIcon was written in 2013 by Jim Paris <[email protected]> and is
// released under the terms of the CC0:
//
// To the extent possible under law, the author(s) have dedicated all
// copyright and related and neighboring rights to this software to
// the public domain worldwide. This software is distributed without
// any arranty.
//
// You may have received a copy of the CC0 Public Domain Dedication
// along with this software.  If not, see
//   http://creativecommons.org/publicdomain/zero/1.0/

class jimIcon {
        // Get an image color from a string
        function get_color($str, $img) {

                $b = ord($str[0]);
                $g = ord($str[1]);
                $r = ord($str[2]);
                if (strlen($str) > 3) {
                        $a = 127 - (ord($str[3]) / 2);
                        if ($a != 0 && $a != 127) {
                                                        $this->had_alpha = 1;

                        }
                } else {
                        $a = 0;
                }
                if ($a != 127) {
                                        $this->all_transaprent = 0;

                }
                return imagecolorallocatealpha($img, $r, $g, $b, $a);
        }

        // Given a string with the contents of an .ICO,
        // return a GD image of the icon, or false on error.
        function fromiconstring($ico) {

                $this->error = "(unknown error)";

                $this->had_alpha = 0;


                // Read header
                if (strlen($ico) < 6) {
                        $this->error = "too short";
                        return false;
                }
                $h = unpack("vzero/vtype/vnum", $ico);

                // Must be ICO format with at least one image
                if ($h["zero"] != 0 || $h["type"] != 1 || $h["num"] == 0) {
                        // See if we can just parse it with GD directly
                        // if it's not ICO format; maybe it was a mislabeled
                        // PNG or something.
                        $i = @imagecreatefromstring($ico);
                        if ($i) {

                                imagesavealpha($i, true);
                                return $i;
                        }
                        $this->error = "not ICO or other image";
                        return false;
                }

                // Read directory entries to find the biggest image
                $most_pixels = 0;
                for ($i = 0; $i < $h["num"]; $i++) {
                        $entry = substr($ico, 6 + 16 * $i, 16);
                        if (!$entry || strlen($entry) < 16) {
                                                        continue;
                        }
                        $e = unpack("Cwidth/".
                                    "Cheight/".
                                    "Ccolors/".
                                    "Czero/".
                                    "vplanes/".
                                    "vbpp/".
                                    "Vsize/".
                                    "Voffset/",
                                    $entry);
                        if ($e["width"] == 0) {
                                                        $e["width"] = 256;
                        }
                        if ($e["height"] == 0) {
                                                        $e["height"] = 256;
                        }
                        if ($e["zero"] != 0) {
                                $this->error = "nonzero reserved field";
                                return false;
                        }
                        $pixels = $e["width"] * $e["height"];
                        if ($pixels > $most_pixels) {
                                $most_pixels = $pixels;
                                $most = $e;
                        }
                }
                if ($most_pixels == 0) {

                        $this->error = "no pixels";
                        return false;
                }
                $e = $most;

                // Extract image data
                $data = substr($ico, $e["offset"], $e["size"]);
                if (!$data || strlen($data) != $e["size"]) {
                        $this->error = "bad image data";
                        return false;
                }

                // See if we can parse it (might be PNG format here)
                $i = @imagecreatefromstring($data);
                if ($i) {
                        imagesavealpha($img, true);
                        return $i;
                }

                // Must be a BMP.  Parse it ourselves.
                $img = imagecreatetruecolor($e["width"], $e["height"]);
                imagesavealpha($img, true);
                $bg = imagecolorallocatealpha($img, 255, 0, 0, 127);
                imagefill($img, 0, 0, $bg);

                // Skip over the BITMAPCOREHEADER or BITMAPINFOHEADER;
                // we'll just assume the palette and pixel data follow
                // in the most obvious format as described by the icon
                // directory entry.
                $bitmapinfo = unpack("Vsize", $data);
                if ($bitmapinfo["size"] == 40) {
                        $info = unpack("Vsize/".
                                        "Vwidth/".
                                        "Vheight/".
                                        "vplanes/".
                                        "vbpp/".
                                        "Vcompress/".
                                        "Vsize/".
                                        "Vxres/".
                                        "Vyres/".
                                        "Vpalcolors/".
                                        "Vimpcolors/", $data);
                        if ($e["bpp"] == 0) {
                                $e["bpp"] = $info["bpp"];
                        }
                }
                $data = substr($data, $bitmapinfo["size"]);

                $height = $e["height"];
                $width = $e["width"];
                $bpp = $e["bpp"];

                // For indexed images, we only support 1, 4, or 8 BPP
                switch ($bpp) {
                case 1:
                case 4:
                case 8:
                        $indexed = 1;
                        break;
                case 24:
                case 32:
                        $indexed = 0;
                        break;
                default:
                        $this->error = "bad BPP $bpp";
                        return false;
                }

                $offset = 0;
                if ($indexed) {
                        $palette = array();
                        $this->all_transparent = 1;
                        for ($i = 0; $i < (1 << $bpp); $i++) {
                                $entry = substr($data, $i * 4, 4);
                                $palette[$i] = $this->get_color($entry, $img);
                        }
                        $offset = $i * 4;

                        // Hack for some icons: if everything was transparent,
                        // discard alpha channel.
                        if ($this->all_transparent) {
                                for ($i = 0; $i < (1 << $bpp); $i++) {
                                        $palette[$i] &= 0xffffff;
                                }
                        }
                }

                // Assume image data follows in bottom-up order.
                // First the "XOR" image
                if ((strlen($data) - $offset) < ($bpp * $height * $width / 8)) {
                        $this->error = "short data";
                        return false;
                }
                $XOR = array();
                for ($y = $height - 1; $y >= 0; $y--) {
                        $x = 0;
                        while ($x < $width) {
                                if (!$indexed) {
                                        $bytes = $bpp / 8;
                                        $entry = substr($data, $offset, $bytes);
                                        $pixel = $this->get_color($entry, $img);
                                        $XOR[$y][$x] = $pixel;
                                        $x++;
                                        $offset += $bytes;
                                } elseif ($bpp == 1) {
                                        $p = ord($data[$offset]);
                                        for ($b = 0x80; $b > 0; $b >>= 1) {
                                                if ($p & $b) {
                                                        $pixel = $palette[1];
                                                } else {
                                                        $pixel = $palette[0];
                                                }
                                                $XOR[$y][$x] = $pixel;
                                                $x++;
                                        }
                                        $offset++;
                                } elseif ($bpp == 4) {
                                        $p = ord($data[$offset]);
                                        $pixel1 = $palette[$p >> 4];
                                        $pixel2 = $palette[$p & 0x0f];
                                        $XOR[$y][$x] = $pixel1;
                                        $XOR[$y][$x + 1] = $pixel2;
                                        $x += 2;
                                        $offset++;
                                } elseif ($bpp == 8) {
                                        $pixel = $palette[ord($data[$offset])];
                                        $XOR[$y][$x] = $pixel;
                                        $x += 1;
                                        $offset++;
                                } else {
                                        $this->error = "bad BPP";
                                        return false;
                                }
                        }
                        // End of row padding
                        while ($offset & 3) {
                                                        $offset++;
                        }
                }

                // Now the "AND" image, which is 1 bit per pixel.  Ignore
                // if some of our image data already had alpha values,
                // or if there isn't enough data left.
                if ($this->had_alpha ||
                    ((strlen($data) - $offset) < ($height * $width / 8))) {
                        // Just return what we've got
                        for ($y = 0; $y < $height; $y++) {
                                for ($x = 0; $x < $width; $x++) {
                                        imagesetpixel($img, $x, $y,
                                                        $XOR[$y][$x]);
                                }
                        }
                        return $img;
                }

                // Mask what we have with the "AND" image
                for ($y = $height - 1; $y >= 0; $y--) {
                        $x = 0;
                        while ($x < $width) {
                                for ($b = 0x80;
                                        $b > 0 && $x < $width; $b >>= 1) {
                                        if (!(ord($data[$offset]) & $b)) {
                                                imagesetpixel($img, $x, $y,
                                                                $XOR[$y][$x]);
                                        }
                                        $x++;
                                }
                                $offset++;
                        }

                        // End of row padding
                        while ($offset & 3) {
                                                        $offset++;
                        }
                }
                return $img;
        }
}
?>


1			<?php
2
3			// Simple .ICO parsing. The ICO format is insanely complex and this may
4			// fail to correctly handle some technically valid files, but it works
5			// on the majority I've found.
6			//
7			// jimIcon was written in 2013 by Jim Paris <[email protected]> and is
8			// released under the terms of the CC0:
9			//
10			// To the extent possible under law, the author(s) have dedicated all
11			// copyright and related and neighboring rights to this software to
12			// the public domain worldwide. This software is distributed without
13			// any arranty.
14			//
15			// You may have received a copy of the CC0 Public Domain Dedication
16			// along with this software. If not, see
17			// http://creativecommons.org/publicdomain/zero/1.0/
18
19			class jimIcon {
20			// Get an image color from a string
21			function get_color($str, $img) {
			0 ignored issues – show Best Practice introduced 2019-12-19 19:08 UTC by Report Bug Copy Issue Report It is generally recommended to explicitly declare the visibility for methods. Adding explicit visibility (`private`, `protected`, or `public`) is generally recommend to communicate to other developers how, and from where this method is intended to be used. Loading history...
22			$b = ord($str[0]);
23			$g = ord($str[1]);
24			$r = ord($str[2]);
25			if (strlen($str) > 3) {
26			$a = 127 - (ord($str[3]) / 2);
27			if ($a != 0 && $a != 127) {
28			$this->had_alpha = 1;
			0 ignored issues – show Bug Best Practice introduced 2019-12-19 19:08 UTC by Report Bug Copy Issue Report The property `had_alpha` does not exist. Although not strictly required by PHP, it is generally a best practice to declare properties explicitly. Loading history...
29			}
30			} else {
31			$a = 0;
32			}
33			if ($a != 127) {
34			$this->all_transaprent = 0;
			0 ignored issues – show Bug Best Practice introduced 2019-12-19 19:08 UTC by Report Bug Copy Issue Report The property `all_transaprent` does not exist. Although not strictly required by PHP, it is generally a best practice to declare properties explicitly. Loading history...
35			}
36			return imagecolorallocatealpha($img, $r, $g, $b, $a);
37			}
38
39			// Given a string with the contents of an .ICO,
40			// return a GD image of the icon, or false on error.
41			function fromiconstring($ico) {
			0 ignored issues – show Best Practice introduced 2019-12-19 19:08 UTC by Report Bug Copy Issue Report It is generally recommended to explicitly declare the visibility for methods. Adding explicit visibility (`private`, `protected`, or `public`) is generally recommend to communicate to other developers how, and from where this method is intended to be used. Loading history...
42			$this->error = "(unknown error)";
			0 ignored issues – show Bug Best Practice introduced 2019-12-19 19:08 UTC by Report Bug Copy Issue Report The property `error` does not exist. Although not strictly required by PHP, it is generally a best practice to declare properties explicitly. Loading history...
43			$this->had_alpha = 0;
			0 ignored issues – show Bug Best Practice introduced 2019-12-19 19:08 UTC by Report Bug Copy Issue Report The property `had_alpha` does not exist. Although not strictly required by PHP, it is generally a best practice to declare properties explicitly. Loading history...
44
45			// Read header
46			if (strlen($ico) < 6) {
47			$this->error = "too short";
48			return false;
49			}
50			$h = unpack("vzero/vtype/vnum", $ico);
51
52			// Must be ICO format with at least one image
53			if ($h["zero"] != 0 \|\| $h["type"] != 1 \|\| $h["num"] == 0) {
54			// See if we can just parse it with GD directly
55			// if it's not ICO format; maybe it was a mislabeled
56			// PNG or something.
57			$i = @imagecreatefromstring($ico);
58			if ($i) {
			0 ignored issues – show introduced 2019-12-19 19:08 UTC by Report Bug Copy Issue Report `$i` is of type `false\|resource`, thus it always evaluated to `false`. Loading history...
59			imagesavealpha($i, true);
60			return $i;
61			}
62			$this->error = "not ICO or other image";
63			return false;
64			}
65
66			// Read directory entries to find the biggest image
67			$most_pixels = 0;
68			for ($i = 0; $i < $h["num"]; $i++) {
69			$entry = substr($ico, 6 + 16 * $i, 16);
70			if (!$entry \|\| strlen($entry) < 16) {
71			continue;
72			}
73			$e = unpack("Cwidth/".
74			"Cheight/".
75			"Ccolors/".
76			"Czero/".
77			"vplanes/".
78			"vbpp/".
79			"Vsize/".
80			"Voffset/",
81			$entry);
82			if ($e["width"] == 0) {
83			$e["width"] = 256;
84			}
85			if ($e["height"] == 0) {
86			$e["height"] = 256;
87			}
88			if ($e["zero"] != 0) {
89			$this->error = "nonzero reserved field";
90			return false;
91			}
92			$pixels = $e["width"] * $e["height"];
93			if ($pixels > $most_pixels) {
94			$most_pixels = $pixels;
95			$most = $e;
96			}
97			}
98			if ($most_pixels == 0) {
			0 ignored issues – show introduced 2019-12-19 19:08 UTC by Report Bug Copy Issue Report The condition `$most_pixels == 0` is always `true`. Loading history...
99			$this->error = "no pixels";
100			return false;
101			}
102			$e = $most;
103
104			// Extract image data
105			$data = substr($ico, $e["offset"], $e["size"]);
106			if (!$data \|\| strlen($data) != $e["size"]) {
107			$this->error = "bad image data";
108			return false;
109			}
110
111			// See if we can parse it (might be PNG format here)
112			$i = @imagecreatefromstring($data);
113			if ($i) {
114			imagesavealpha($img, true);
115			return $i;
116			}
117
118			// Must be a BMP. Parse it ourselves.
119			$img = imagecreatetruecolor($e["width"], $e["height"]);
120			imagesavealpha($img, true);
121			$bg = imagecolorallocatealpha($img, 255, 0, 0, 127);
122			imagefill($img, 0, 0, $bg);
123
124			// Skip over the BITMAPCOREHEADER or BITMAPINFOHEADER;
125			// we'll just assume the palette and pixel data follow
126			// in the most obvious format as described by the icon
127			// directory entry.
128			$bitmapinfo = unpack("Vsize", $data);
129			if ($bitmapinfo["size"] == 40) {
130			$info = unpack("Vsize/".
131			"Vwidth/".
132			"Vheight/".
133			"vplanes/".
134			"vbpp/".
135			"Vcompress/".
136			"Vsize/".
137			"Vxres/".
138			"Vyres/".
139			"Vpalcolors/".
140			"Vimpcolors/", $data);
141			if ($e["bpp"] == 0) {
142			$e["bpp"] = $info["bpp"];
143			}
144			}
145			$data = substr($data, $bitmapinfo["size"]);
146
147			$height = $e["height"];
148			$width = $e["width"];
149			$bpp = $e["bpp"];
150
151			// For indexed images, we only support 1, 4, or 8 BPP
152			switch ($bpp) {
153			case 1:
154			case 4:
155			case 8:
156			$indexed = 1;
157			break;
158			case 24:
159			case 32:
160			$indexed = 0;
161			break;
162			default:
163			$this->error = "bad BPP $bpp";
164			return false;
165			}
166
167			$offset = 0;
168			if ($indexed) {
169			$palette = array();
170			$this->all_transparent = 1;
171			for ($i = 0; $i < (1 << $bpp); $i++) {
172			$entry = substr($data, $i * 4, 4);
173			$palette[$i] = $this->get_color($entry, $img);
174			}
175			$offset = $i * 4;
176
177			// Hack for some icons: if everything was transparent,
178			// discard alpha channel.
179			if ($this->all_transparent) {
180			for ($i = 0; $i < (1 << $bpp); $i++) {
181			$palette[$i] &= 0xffffff;
182			}
183			}
184			}
185
186			// Assume image data follows in bottom-up order.
187			// First the "XOR" image
188			if ((strlen($data) - $offset) < ($bpp * $height * $width / 8)) {
189			$this->error = "short data";
190			return false;
191			}
192			$XOR = array();
193			for ($y = $height - 1; $y >= 0; $y--) {
194			$x = 0;
195			while ($x < $width) {
196			if (!$indexed) {
197			$bytes = $bpp / 8;
198			$entry = substr($data, $offset, $bytes);
199			$pixel = $this->get_color($entry, $img);
200			$XOR[$y][$x] = $pixel;
201			$x++;
202			$offset += $bytes;
203			} elseif ($bpp == 1) {
204			$p = ord($data[$offset]);
205			for ($b = 0x80; $b > 0; $b >>= 1) {
206			if ($p & $b) {
207			$pixel = $palette[1];
208			} else {
209			$pixel = $palette[0];
210			}
211			$XOR[$y][$x] = $pixel;
212			$x++;
213			}
214			$offset++;
215			} elseif ($bpp == 4) {
216			$p = ord($data[$offset]);
217			$pixel1 = $palette[$p >> 4];
218			$pixel2 = $palette[$p & 0x0f];
219			$XOR[$y][$x] = $pixel1;
220			$XOR[$y][$x + 1] = $pixel2;
221			$x += 2;
222			$offset++;
223			} elseif ($bpp == 8) {
224			$pixel = $palette[ord($data[$offset])];
225			$XOR[$y][$x] = $pixel;
226			$x += 1;
227			$offset++;
228			} else {
229			$this->error = "bad BPP";
230			return false;
231			}
232			}
233			// End of row padding
234			while ($offset & 3) {
235			$offset++;
236			}
237			}
238
239			// Now the "AND" image, which is 1 bit per pixel. Ignore
240			// if some of our image data already had alpha values,
241			// or if there isn't enough data left.
242			if ($this->had_alpha \|\|
243			((strlen($data) - $offset) < ($height * $width / 8))) {
244			// Just return what we've got
245			for ($y = 0; $y < $height; $y++) {
246			for ($x = 0; $x < $width; $x++) {
247			imagesetpixel($img, $x, $y,
248			$XOR[$y][$x]);
249			}
250			}
251			return $img;
252			}
253
254			// Mask what we have with the "AND" image
255			for ($y = $height - 1; $y >= 0; $y--) {
256			$x = 0;
257			while ($x < $width) {
258			for ($b = 0x80;
259			$b > 0 && $x < $width; $b >>= 1) {
260			if (!(ord($data[$offset]) & $b)) {
261			imagesetpixel($img, $x, $y,
262			$XOR[$y][$x]);
263			}
264			$x++;
265			}
266			$offset++;
267			}
268
269			// End of row padding
270			while ($offset & 3) {
271			$offset++;
272			}
273			}
274			return $img;
275			}
276			}
277			?>
			0 ignored issues – show Best Practice introduced 2019-12-19 19:08 UTC by Report Bug Copy Issue Report It is not recommended to use PHP's closing tag `?>` in files other than templates. Using a closing tag in PHP files that only contain PHP code is not recommended as you might accidentally add whitespace after the closing tag which would then be output by PHP. This can cause severe problems, for example headers cannot be sent anymore. A simple precaution is to leave off the closing tag as it is not required, and it also has no negative effects whatsoever. Loading history...

codysnider / tt-rss

jimIcon::get_color() A last analyzed 2019-12-23 07:25 UTC

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jimIcon::get_color() A
last analyzed 2019-12-23 07:25 UTC