line |
stmt |
bran |
cond |
sub |
pod |
time |
code |
1
|
|
|
|
|
|
|
package PDF::API2::Resource::XObject::Image::PNG; |
2
|
|
|
|
|
|
|
|
3
|
2
|
|
|
2
|
|
1124
|
use base 'PDF::API2::Resource::XObject::Image'; |
|
2
|
|
|
|
|
4
|
|
|
2
|
|
|
|
|
586
|
|
4
|
|
|
|
|
|
|
|
5
|
2
|
|
|
2
|
|
16
|
use strict; |
|
2
|
|
|
|
|
5
|
|
|
2
|
|
|
|
|
42
|
|
6
|
2
|
|
|
2
|
|
10
|
use warnings; |
|
2
|
|
|
|
|
4
|
|
|
2
|
|
|
|
|
78
|
|
7
|
|
|
|
|
|
|
|
8
|
|
|
|
|
|
|
our $VERSION = '2.044'; # VERSION |
9
|
|
|
|
|
|
|
|
10
|
2
|
|
|
2
|
|
11
|
use Compress::Zlib; |
|
2
|
|
|
|
|
4
|
|
|
2
|
|
|
|
|
639
|
|
11
|
2
|
|
|
2
|
|
15
|
use POSIX qw(ceil floor); |
|
2
|
|
|
|
|
7
|
|
|
2
|
|
|
|
|
19
|
|
12
|
|
|
|
|
|
|
|
13
|
2
|
|
|
2
|
|
181
|
use IO::File; |
|
2
|
|
|
|
|
4
|
|
|
2
|
|
|
|
|
336
|
|
14
|
2
|
|
|
2
|
|
14
|
use PDF::API2::Util; |
|
2
|
|
|
|
|
5
|
|
|
2
|
|
|
|
|
269
|
|
15
|
2
|
|
|
2
|
|
14
|
use PDF::API2::Basic::PDF::Utils; |
|
2
|
|
|
|
|
3
|
|
|
2
|
|
|
|
|
176
|
|
16
|
2
|
|
|
2
|
|
12
|
use Scalar::Util qw(weaken); |
|
2
|
|
|
|
|
5
|
|
|
2
|
|
|
|
|
4876
|
|
17
|
|
|
|
|
|
|
|
18
|
2
|
|
|
2
|
|
357
|
eval 'use PDF::API2::XS::ImagePNG'; |
|
0
|
|
|
|
|
0
|
|
|
0
|
|
|
|
|
0
|
|
19
|
|
|
|
|
|
|
my $use_xs = $@ ? 0 : 1; |
20
|
|
|
|
|
|
|
|
21
|
|
|
|
|
|
|
sub new { |
22
|
5
|
|
|
5
|
1
|
19
|
my ($class, $pdf, $file, $name, %opts) = @_; |
23
|
5
|
|
|
|
|
8
|
my $self; |
24
|
|
|
|
|
|
|
|
25
|
5
|
50
|
|
|
|
16
|
$class = ref($class) if ref($class); |
26
|
|
|
|
|
|
|
|
27
|
5
|
|
33
|
|
|
30
|
$self = $class->SUPER::new($pdf, $name || 'Px' . pdfkey()); |
28
|
5
|
50
|
|
|
|
15
|
$pdf->new_obj($self) unless $self->is_obj($pdf); |
29
|
|
|
|
|
|
|
|
30
|
5
|
|
|
|
|
13
|
$self->{' apipdf'} = $pdf; |
31
|
5
|
|
|
|
|
15
|
weaken $self->{' apipdf'}; |
32
|
|
|
|
|
|
|
|
33
|
5
|
|
|
|
|
29
|
my $fh = IO::File->new(); |
34
|
5
|
100
|
|
|
|
185
|
if (ref($file)) { |
35
|
1
|
|
|
|
|
4
|
$fh = $file; |
36
|
|
|
|
|
|
|
} |
37
|
|
|
|
|
|
|
else { |
38
|
4
|
100
|
|
|
|
244
|
open $fh, '<', $file or die "$!: $file"; |
39
|
|
|
|
|
|
|
} |
40
|
4
|
|
|
|
|
28
|
binmode $fh, ':raw'; |
41
|
|
|
|
|
|
|
|
42
|
4
|
|
|
|
|
13
|
my ($buf, $l, $crc, $w, $h, $bpc, $cs, $cm, $fm, $im, $palette, $trns); |
43
|
4
|
|
|
|
|
34
|
seek($fh, 8, 0); |
44
|
4
|
|
|
|
|
18
|
$self->{' stream'} = ''; |
45
|
4
|
|
|
|
|
15
|
$self->{' nofilt'} = 1; |
46
|
4
|
|
|
|
|
157
|
while (!eof($fh)) { |
47
|
18
|
|
|
|
|
43
|
read($fh, $buf, 4); |
48
|
18
|
|
|
|
|
58
|
$l = unpack('N', $buf); |
49
|
18
|
|
|
|
|
36
|
read($fh, $buf, 4); |
50
|
18
|
100
|
|
|
|
72
|
if ($buf eq 'IHDR') { |
|
|
100
|
|
|
|
|
|
|
|
100
|
|
|
|
|
|
|
|
50
|
|
|
|
|
|
|
|
100
|
|
|
|
|
|
51
|
4
|
|
|
|
|
9
|
read($fh, $buf, $l); |
52
|
4
|
|
|
|
|
18
|
($w, $h, $bpc, $cs, $cm, $fm, $im) = unpack('NNCCCCC', $buf); |
53
|
4
|
50
|
|
|
|
11
|
die "Unsupported Compression($cm) Method" if $cm; |
54
|
4
|
50
|
|
|
|
10
|
die "Unsupported Interlace($im) Method" if $im; |
55
|
4
|
50
|
|
|
|
11
|
die "Unsupported Filter($fm) Method" if $fm; |
56
|
|
|
|
|
|
|
} |
57
|
|
|
|
|
|
|
elsif ($buf eq 'PLTE') { |
58
|
2
|
|
|
|
|
3
|
read($fh, $buf, $l); |
59
|
2
|
|
|
|
|
5
|
$palette = $buf; |
60
|
|
|
|
|
|
|
} |
61
|
|
|
|
|
|
|
elsif ($buf eq 'IDAT') { |
62
|
4
|
|
|
|
|
85
|
read($fh, $buf, $l); |
63
|
4
|
|
|
|
|
48
|
$self->{' stream'} .= $buf; |
64
|
|
|
|
|
|
|
} |
65
|
|
|
|
|
|
|
elsif ($buf eq 'tRNS') { |
66
|
0
|
|
|
|
|
0
|
read($fh, $buf, $l); |
67
|
0
|
|
|
|
|
0
|
$trns = $buf; |
68
|
|
|
|
|
|
|
} |
69
|
|
|
|
|
|
|
elsif ($buf eq 'IEND') { |
70
|
4
|
|
|
|
|
9
|
last; |
71
|
|
|
|
|
|
|
} |
72
|
|
|
|
|
|
|
else { |
73
|
|
|
|
|
|
|
# skip ahead |
74
|
4
|
|
|
|
|
44
|
seek($fh, $l, 1); |
75
|
|
|
|
|
|
|
} |
76
|
14
|
|
|
|
|
55
|
read($fh, $buf, 4); |
77
|
14
|
|
|
|
|
40
|
$crc = $buf; |
78
|
|
|
|
|
|
|
} |
79
|
4
|
100
|
|
|
|
68
|
close $fh unless ref($file); |
80
|
|
|
|
|
|
|
|
81
|
4
|
|
|
|
|
30
|
$self->width($w); |
82
|
4
|
|
|
|
|
19
|
$self->height($h); |
83
|
|
|
|
|
|
|
|
84
|
|
|
|
|
|
|
# BPC = bits per component, and may be 1, 2, 4, 8, or 16 per the PNG spec. |
85
|
|
|
|
|
|
|
# Color types may further restrict the available options. Additionally, |
86
|
|
|
|
|
|
|
# this module doesn't currently support 16-bit components. |
87
|
4
|
50
|
|
|
|
10
|
if ($bpc == 16) { |
88
|
0
|
|
|
|
|
0
|
die '16-bit colors/transparency are not supported.'; |
89
|
|
|
|
|
|
|
} |
90
|
4
|
50
|
66
|
|
|
31
|
unless ($bpc == 1 or $bpc == 2 or $bpc == 4 or $bpc == 8) { |
|
|
|
66
|
|
|
|
|
|
|
|
33
|
|
|
|
|
91
|
0
|
|
|
|
|
0
|
die "Invalid component bit depth: $bpc."; |
92
|
|
|
|
|
|
|
} |
93
|
|
|
|
|
|
|
|
94
|
|
|
|
|
|
|
# Grayscale |
95
|
4
|
50
|
|
|
|
22
|
if ($cs == 0) { |
|
|
50
|
|
|
|
|
|
|
|
100
|
|
|
|
|
|
|
|
50
|
|
|
|
|
|
|
|
50
|
|
|
|
|
|
96
|
0
|
|
|
|
|
0
|
$self->filters('FlateDecode'); |
97
|
0
|
|
|
|
|
0
|
$self->colorspace('DeviceGray'); |
98
|
0
|
|
|
|
|
0
|
$self->bpc($bpc); |
99
|
0
|
|
|
|
|
0
|
my $dict = PDFDict(); |
100
|
0
|
|
|
|
|
0
|
$self->{'DecodeParms'} = PDFArray($dict); |
101
|
0
|
|
|
|
|
0
|
$dict->{'Predictor'} = PDFNum(15); |
102
|
0
|
|
|
|
|
0
|
$dict->{'BitsPerComponent'} = PDFNum($bpc); |
103
|
0
|
|
|
|
|
0
|
$dict->{'Colors'} = PDFNum(1); |
104
|
0
|
|
|
|
|
0
|
$dict->{'Columns'} = PDFNum($w); |
105
|
0
|
0
|
0
|
|
|
0
|
if (defined $trns and not $opts{'-notrans'}) { |
106
|
0
|
|
|
|
|
0
|
my $m = mMax(unpack('n*', $trns)); |
107
|
0
|
|
|
|
|
0
|
my $n = mMin(unpack('n*', $trns)); |
108
|
0
|
|
|
|
|
0
|
$self->{'Mask'} = PDFArray(PDFNum($n), PDFNum($m)); |
109
|
|
|
|
|
|
|
} |
110
|
|
|
|
|
|
|
} |
111
|
|
|
|
|
|
|
|
112
|
|
|
|
|
|
|
# RGB |
113
|
|
|
|
|
|
|
elsif ($cs == 2) { |
114
|
0
|
|
|
|
|
0
|
$self->filters('FlateDecode'); |
115
|
0
|
|
|
|
|
0
|
$self->colorspace('DeviceRGB'); |
116
|
0
|
|
|
|
|
0
|
$self->bpc($bpc); |
117
|
0
|
|
|
|
|
0
|
my $dict = PDFDict(); |
118
|
0
|
|
|
|
|
0
|
$self->{'DecodeParms'} = PDFArray($dict); |
119
|
0
|
|
|
|
|
0
|
$dict->{'Predictor'} = PDFNum(15); |
120
|
0
|
|
|
|
|
0
|
$dict->{'BitsPerComponent'} = PDFNum($bpc); |
121
|
0
|
|
|
|
|
0
|
$dict->{'Colors'} = PDFNum(3); |
122
|
0
|
|
|
|
|
0
|
$dict->{'Columns'} = PDFNum($w); |
123
|
0
|
0
|
0
|
|
|
0
|
if (defined $trns and not $opts{'-notrans'}) { |
124
|
0
|
|
|
|
|
0
|
my @v = unpack('n*', $trns); |
125
|
0
|
|
|
|
|
0
|
my (@cr, @cg, @cb, $m, $n); |
126
|
0
|
|
|
|
|
0
|
while (scalar @v > 0) { |
127
|
0
|
|
|
|
|
0
|
push @cr, shift(@v); |
128
|
0
|
|
|
|
|
0
|
push @cg, shift(@v); |
129
|
0
|
|
|
|
|
0
|
push @cb, shift(@v); |
130
|
|
|
|
|
|
|
} |
131
|
0
|
|
|
|
|
0
|
@v = (); |
132
|
0
|
|
|
|
|
0
|
$m = mMax(@cr); |
133
|
0
|
|
|
|
|
0
|
$n = mMin(@cr); |
134
|
0
|
|
|
|
|
0
|
push @v, $n, $m; |
135
|
0
|
|
|
|
|
0
|
$m = mMax(@cg); |
136
|
0
|
|
|
|
|
0
|
$n = mMin(@cg); |
137
|
0
|
|
|
|
|
0
|
push @v, $n, $m; |
138
|
0
|
|
|
|
|
0
|
$m = mMax(@cb); |
139
|
0
|
|
|
|
|
0
|
$n = mMin(@cb); |
140
|
0
|
|
|
|
|
0
|
push @v, $n, $m; |
141
|
0
|
|
|
|
|
0
|
$self->{'Mask'} = PDFArray(map { PDFNum($_) } @v); |
|
0
|
|
|
|
|
0
|
|
142
|
|
|
|
|
|
|
} |
143
|
|
|
|
|
|
|
} |
144
|
|
|
|
|
|
|
|
145
|
|
|
|
|
|
|
# Palette Index |
146
|
|
|
|
|
|
|
elsif ($cs == 3) { |
147
|
2
|
|
|
|
|
5
|
my $dict = PDFDict(); |
148
|
2
|
|
|
|
|
9
|
$pdf->new_obj($dict); |
149
|
2
|
|
|
|
|
6
|
$dict->{'Filter'} = PDFArray(PDFName('FlateDecode')); |
150
|
2
|
|
|
|
|
5
|
$dict->{' stream'} = $palette; |
151
|
2
|
|
|
|
|
4
|
$palette = ''; |
152
|
2
|
|
|
|
|
13
|
$self->filters('FlateDecode'); |
153
|
2
|
|
|
|
|
5
|
$self->colorspace(PDFArray(PDFName('Indexed'), PDFName('DeviceRGB'), PDFNum(int(length($dict->{' stream'}) / 3) - 1), $dict)); |
154
|
2
|
|
|
|
|
9
|
$self->bpc($bpc); |
155
|
2
|
|
|
|
|
5
|
$dict = PDFDict(); |
156
|
2
|
|
|
|
|
5
|
$self->{'DecodeParms'} = PDFArray($dict); |
157
|
2
|
|
|
|
|
6
|
$dict->{'Predictor'} = PDFNum(15); |
158
|
2
|
|
|
|
|
5
|
$dict->{'BitsPerComponent'} = PDFNum($bpc); |
159
|
2
|
|
|
|
|
4
|
$dict->{'Colors'} = PDFNum(1); |
160
|
2
|
|
|
|
|
11
|
$dict->{'Columns'} = PDFNum($w); |
161
|
2
|
50
|
33
|
|
|
8
|
if (defined $trns and not $opts{'-notrans'}) { |
162
|
0
|
|
|
|
|
0
|
$trns .= "\xFF" x 256; |
163
|
0
|
|
|
|
|
0
|
$dict = PDFDict(); |
164
|
0
|
|
|
|
|
0
|
$pdf->new_obj($dict); |
165
|
0
|
|
|
|
|
0
|
$dict->{'Type'} = PDFName('XObject'); |
166
|
0
|
|
|
|
|
0
|
$dict->{'Subtype'} = PDFName('Image'); |
167
|
0
|
|
|
|
|
0
|
$dict->{'Width'} = PDFNum($w); |
168
|
0
|
|
|
|
|
0
|
$dict->{'Height'} = PDFNum($h); |
169
|
0
|
|
|
|
|
0
|
$dict->{'ColorSpace'} = PDFName('DeviceGray'); |
170
|
0
|
|
|
|
|
0
|
$dict->{'Filter'} = PDFArray(PDFName('FlateDecode')); |
171
|
0
|
|
|
|
|
0
|
$dict->{'BitsPerComponent'} = PDFNum(8); |
172
|
0
|
|
|
|
|
0
|
$self->{'SMask'} = $dict; |
173
|
0
|
|
|
|
|
0
|
my $scanline = 1 + ceil($bpc * $w / 8); |
174
|
0
|
|
|
|
|
0
|
my $bpp = ceil($bpc / 8); |
175
|
0
|
|
|
|
|
0
|
my $clearstream = unprocess($bpc, $bpp, 1, $w, $h, $scanline, \$self->{' stream'}, $file); |
176
|
0
|
|
|
|
|
0
|
foreach my $n (0 .. ($h * $w) - 1) { |
177
|
0
|
|
|
|
|
0
|
vec($dict->{' stream'}, $n, 8) = vec($trns, vec($clearstream, $n, $bpc), 8); |
178
|
|
|
|
|
|
|
} |
179
|
|
|
|
|
|
|
} |
180
|
|
|
|
|
|
|
} |
181
|
|
|
|
|
|
|
|
182
|
|
|
|
|
|
|
# Grayscale + Alpha |
183
|
|
|
|
|
|
|
elsif ($cs == 4) { |
184
|
0
|
|
|
|
|
0
|
$self->filters('FlateDecode'); |
185
|
0
|
|
|
|
|
0
|
$self->colorspace('DeviceGray'); |
186
|
0
|
|
|
|
|
0
|
$self->bpc($bpc); |
187
|
0
|
|
|
|
|
0
|
my $dict = PDFDict(); |
188
|
0
|
|
|
|
|
0
|
$self->{'DecodeParms'} = PDFArray($dict); |
189
|
0
|
|
|
|
|
0
|
$dict->{'BitsPerComponent'} = PDFNum($bpc); |
190
|
0
|
|
|
|
|
0
|
$dict->{'Colors'} = PDFNum(1); |
191
|
0
|
|
|
|
|
0
|
$dict->{'Columns'} = PDFNum($w); |
192
|
|
|
|
|
|
|
|
193
|
|
|
|
|
|
|
# The unprocess call below removes the PNG optimizations, so use the |
194
|
|
|
|
|
|
|
# default Predictor (none) instead of PNG optimized (15), as in other |
195
|
|
|
|
|
|
|
# color types. |
196
|
|
|
|
|
|
|
# |
197
|
|
|
|
|
|
|
# $dict->{'Predictor'} = PDFNum(15); |
198
|
|
|
|
|
|
|
|
199
|
0
|
|
|
|
|
0
|
$dict = PDFDict(); |
200
|
0
|
0
|
|
|
|
0
|
unless ($opts{'-notrans'}) { |
201
|
0
|
|
|
|
|
0
|
$pdf->new_obj($dict); |
202
|
0
|
|
|
|
|
0
|
$dict->{'Type'} = PDFName('XObject'); |
203
|
0
|
|
|
|
|
0
|
$dict->{'Subtype'} = PDFName('Image'); |
204
|
0
|
|
|
|
|
0
|
$dict->{'Width'} = PDFNum($w); |
205
|
0
|
|
|
|
|
0
|
$dict->{'Height'} = PDFNum($h); |
206
|
0
|
|
|
|
|
0
|
$dict->{'ColorSpace'} = PDFName('DeviceGray'); |
207
|
0
|
|
|
|
|
0
|
$dict->{'Filter'} = PDFArray(PDFName('FlateDecode')); |
208
|
0
|
|
|
|
|
0
|
$dict->{'BitsPerComponent'} = PDFNum($bpc); |
209
|
0
|
|
|
|
|
0
|
$self->{'SMask'} = $dict; |
210
|
|
|
|
|
|
|
} |
211
|
0
|
|
|
|
|
0
|
my $scanline = 1 + ceil($bpc * 2 * $w / 8); |
212
|
0
|
|
|
|
|
0
|
my $bpp = ceil($bpc * 2 / 8); |
213
|
0
|
|
|
|
|
0
|
my $clearstream = unprocess($bpc, $bpp, 2, $w, $h, $scanline, \$self->{' stream'}, $file); |
214
|
0
|
|
|
|
|
0
|
delete $self->{' nofilt'}; |
215
|
0
|
|
|
|
|
0
|
delete $self->{' stream'}; |
216
|
0
|
|
|
|
|
0
|
foreach my $n (0 .. ($h * $w) - 1) { |
217
|
0
|
|
|
|
|
0
|
vec($self->{' stream'}, $n, $bpc) = vec($clearstream, $n * 2, $bpc); |
218
|
0
|
|
|
|
|
0
|
vec($dict->{' stream'}, $n, $bpc) = vec($clearstream, $n * 2 + 1, $bpc); |
219
|
|
|
|
|
|
|
} |
220
|
|
|
|
|
|
|
} |
221
|
|
|
|
|
|
|
|
222
|
|
|
|
|
|
|
# RGB + Alpha |
223
|
|
|
|
|
|
|
elsif ($cs == 6) { |
224
|
2
|
|
|
|
|
10
|
$self->filters('FlateDecode'); |
225
|
2
|
|
|
|
|
11
|
$self->colorspace('DeviceRGB'); |
226
|
2
|
|
|
|
|
9
|
$self->bpc($bpc); |
227
|
2
|
|
|
|
|
6
|
my $dict = PDFDict(); |
228
|
2
|
|
|
|
|
13
|
$self->{'DecodeParms'} = PDFArray($dict); |
229
|
2
|
|
|
|
|
9
|
$dict->{'BitsPerComponent'} = PDFNum($bpc); |
230
|
2
|
|
|
|
|
6
|
$dict->{'Colors'} = PDFNum(3); |
231
|
2
|
|
|
|
|
8
|
$dict->{'Columns'} = PDFNum($w); |
232
|
|
|
|
|
|
|
|
233
|
|
|
|
|
|
|
# The unprocess call below removes the PNG optimizations, so use the |
234
|
|
|
|
|
|
|
# default Predictor (none) instead of PNG optimized (15), as in other |
235
|
|
|
|
|
|
|
# color types. |
236
|
|
|
|
|
|
|
# |
237
|
|
|
|
|
|
|
# $dict->{'Predictor'} = PDFNum(15); |
238
|
|
|
|
|
|
|
|
239
|
2
|
|
|
|
|
5
|
$dict = PDFDict(); |
240
|
2
|
50
|
|
|
|
9
|
unless ($opts{'-notrans'}) { |
241
|
2
|
|
|
|
|
8
|
$pdf->new_obj($dict); |
242
|
2
|
|
|
|
|
6
|
$dict->{'Type'} = PDFName('XObject'); |
243
|
2
|
|
|
|
|
7
|
$dict->{'Subtype'} = PDFName('Image'); |
244
|
2
|
|
|
|
|
7
|
$dict->{'Width'} = PDFNum($w); |
245
|
2
|
|
|
|
|
6
|
$dict->{'Height'} = PDFNum($h); |
246
|
2
|
|
|
|
|
6
|
$dict->{'ColorSpace'} = PDFName('DeviceGray'); |
247
|
2
|
|
|
|
|
6
|
$dict->{'Filter'} = PDFArray(PDFName('FlateDecode')); |
248
|
2
|
|
|
|
|
5
|
$dict->{'BitsPerComponent'} = PDFNum($bpc); |
249
|
2
|
|
|
|
|
6
|
$self->{'SMask'} = $dict; |
250
|
|
|
|
|
|
|
} |
251
|
2
|
|
|
|
|
16
|
my $scanline = 1 + ceil($bpc * 4 * $w / 8); |
252
|
2
|
|
|
|
|
8
|
my $bpp = ceil($bpc * 4 / 8); |
253
|
2
|
|
|
|
|
10
|
my $clearstream = unprocess($bpc, $bpp, 4, $w, $h, $scanline, \$self->{' stream'}, $file); |
254
|
2
|
|
|
|
|
21
|
delete $self->{' nofilt'}; |
255
|
2
|
|
|
|
|
16
|
delete $self->{' stream'}; |
256
|
|
|
|
|
|
|
|
257
|
|
|
|
|
|
|
# If possible, use XS to split the Alpha channel from the RGB channels, |
258
|
|
|
|
|
|
|
# which is much faster than doing so in Perl. |
259
|
2
|
50
|
33
|
|
|
47
|
if ($use_xs and $bpc == 8 and not $ENV{'PDFAPI2_PNG_PP'}) { |
|
|
|
33
|
|
|
|
|
260
|
|
|
|
|
|
|
# Convert the stream to an array before passing it to XS. |
261
|
|
|
|
|
|
|
# Otherwise, a 0 byte in the stream would terminate the string. |
262
|
0
|
|
|
|
|
0
|
my @stream = split '', $clearstream; |
263
|
0
|
|
|
|
|
0
|
my @outstream_array = @{split_channels(\@stream, $w, $h)}; |
|
0
|
|
|
|
|
0
|
|
264
|
0
|
|
|
|
|
0
|
$self->{' stream'} = pack("C*", splice @outstream_array, 0, ($w * $h * 3)); |
265
|
0
|
|
|
|
|
0
|
$dict->{' stream'} = pack("C*", splice @outstream_array, 0, ($w * $h)); |
266
|
|
|
|
|
|
|
} |
267
|
|
|
|
|
|
|
else { |
268
|
2
|
|
|
|
|
15
|
foreach my $n (0 .. ($h * $w) - 1) { |
269
|
218120
|
|
|
|
|
398526
|
vec($self->{' stream'}, $n * 3, $bpc) = vec($clearstream, ($n * 4), $bpc); |
270
|
218120
|
|
|
|
|
417760
|
vec($self->{' stream'}, $n * 3 + 1, $bpc) = vec($clearstream, ($n * 4) + 1, $bpc); |
271
|
218120
|
|
|
|
|
417216
|
vec($self->{' stream'}, $n * 3 + 2, $bpc) = vec($clearstream, ($n * 4) + 2, $bpc); |
272
|
218120
|
|
|
|
|
471608
|
vec($dict->{' stream'}, $n, $bpc) = vec($clearstream, ($n * 4) + 3, $bpc); |
273
|
|
|
|
|
|
|
} |
274
|
|
|
|
|
|
|
} |
275
|
|
|
|
|
|
|
} |
276
|
|
|
|
|
|
|
|
277
|
|
|
|
|
|
|
# Unknown/Unsupported |
278
|
|
|
|
|
|
|
else { |
279
|
0
|
|
|
|
|
0
|
die "Unknown PNG color type: $cs."; |
280
|
|
|
|
|
|
|
} |
281
|
|
|
|
|
|
|
|
282
|
4
|
|
|
|
|
50
|
return $self; |
283
|
|
|
|
|
|
|
} |
284
|
|
|
|
|
|
|
|
285
|
|
|
|
|
|
|
sub PaethPredictor { |
286
|
94240
|
|
|
94240
|
0
|
193560
|
my ($a, $b, $c) = @_; |
287
|
94240
|
|
|
|
|
140794
|
my $p = $a + $b - $c; |
288
|
94240
|
|
|
|
|
127890
|
my $pa = abs($p - $a); |
289
|
94240
|
|
|
|
|
127452
|
my $pb = abs($p - $b); |
290
|
94240
|
|
|
|
|
128761
|
my $pc = abs($p - $c); |
291
|
94240
|
100
|
100
|
|
|
233895
|
if (($pa <= $pb) && ($pa <= $pc)) { |
|
|
100
|
|
|
|
|
|
292
|
82304
|
|
|
|
|
245029
|
return $a; |
293
|
|
|
|
|
|
|
} |
294
|
|
|
|
|
|
|
elsif ($pb <= $pc) { |
295
|
11154
|
|
|
|
|
32207
|
return $b; |
296
|
|
|
|
|
|
|
} |
297
|
|
|
|
|
|
|
else { |
298
|
782
|
|
|
|
|
2332
|
return $c; |
299
|
|
|
|
|
|
|
} |
300
|
|
|
|
|
|
|
} |
301
|
|
|
|
|
|
|
|
302
|
|
|
|
|
|
|
sub unprocess { |
303
|
2
|
|
|
2
|
0
|
7
|
my ($bpc, $bpp, $comp, $width, $height, $scanline, $sstream, $file) = @_; |
304
|
|
|
|
|
|
|
|
305
|
|
|
|
|
|
|
# If Image::PNG::Libpng is available, use it to uncompress and unfilter the |
306
|
|
|
|
|
|
|
# image data much more quickly. |
307
|
2
|
100
|
66
|
|
|
13
|
if ($file and not $ENV{'PDFAPI2_PNG_PP'}) { |
308
|
1
|
|
|
|
|
76
|
eval 'require Image::PNG::Libpng'; |
309
|
1
|
50
|
|
|
|
8
|
unless ($@) { |
310
|
0
|
|
|
|
|
0
|
my $libpng; |
311
|
0
|
|
|
|
|
0
|
eval { |
312
|
0
|
|
|
|
|
0
|
$libpng = Image::PNG::Libpng::read_png_file($file); |
313
|
|
|
|
|
|
|
}; |
314
|
0
|
0
|
|
|
|
0
|
return join('', @{$libpng->get_rows()}) if $libpng; |
|
0
|
|
|
|
|
0
|
|
315
|
|
|
|
|
|
|
} |
316
|
|
|
|
|
|
|
} |
317
|
|
|
|
|
|
|
|
318
|
2
|
|
|
|
|
10
|
my $stream = uncompress($$sstream); |
319
|
2
|
|
|
|
|
5249
|
my $prev = ''; |
320
|
2
|
|
|
|
|
5
|
my $clearstream = ''; |
321
|
|
|
|
|
|
|
|
322
|
|
|
|
|
|
|
# The XS code uses a uint8 array so can only handle bpc = 8 |
323
|
2
|
50
|
33
|
|
|
14
|
if ($use_xs and $bpc == 8 and not $ENV{'PDFAPI2_PNG_PP'}) { |
|
|
|
33
|
|
|
|
|
324
|
0
|
|
|
|
|
0
|
my $clearstream_array = []; |
325
|
0
|
|
|
|
|
0
|
foreach my $n (0 .. $height - 1) { |
326
|
0
|
|
|
|
|
0
|
my $line = substr($stream, $n * $scanline, $scanline); |
327
|
0
|
|
|
|
|
0
|
my $filter = vec($line, 0, 8); |
328
|
0
|
|
|
|
|
0
|
$line = substr($line, 1); |
329
|
|
|
|
|
|
|
|
330
|
0
|
|
|
|
|
0
|
my @in_line = split '', $line; |
331
|
0
|
|
|
|
|
0
|
my @prev_line = split '', $prev; |
332
|
0
|
|
|
|
|
0
|
my $clear_array = unfilter(\@in_line, \@prev_line, $filter, $bpp); |
333
|
0
|
|
|
|
|
0
|
$prev = pack("C*", @{$clear_array}); |
|
0
|
|
|
|
|
0
|
|
334
|
0
|
|
|
|
|
0
|
foreach my $x (0 .. ($width * $comp) - 1) { |
335
|
0
|
|
|
|
|
0
|
$clearstream_array->[($n * $width * $comp) + $x] = $clear_array->[$x]; |
336
|
|
|
|
|
|
|
} |
337
|
2
|
|
|
2
|
|
19
|
no warnings 'uninitialized'; # ignore undefined array elements |
|
2
|
|
|
|
|
4
|
|
|
2
|
|
|
|
|
821
|
|
338
|
0
|
|
|
|
|
0
|
$clearstream = pack("C*", @{$clearstream_array}); |
|
0
|
|
|
|
|
0
|
|
339
|
|
|
|
|
|
|
} |
340
|
|
|
|
|
|
|
} |
341
|
|
|
|
|
|
|
else { |
342
|
2
|
|
|
|
|
100
|
foreach my $n (0 .. $height - 1) { |
343
|
574
|
|
|
|
|
2373
|
my $line = substr($stream, $n * $scanline, $scanline); |
344
|
574
|
|
|
|
|
884
|
my $filter = vec($line, 0, 8); |
345
|
574
|
|
|
|
|
785
|
my $clear = ''; |
346
|
574
|
|
|
|
|
1257
|
$line = substr($line, 1); |
347
|
|
|
|
|
|
|
|
348
|
|
|
|
|
|
|
# See "Filter Algorithms" in the documentation below for definitions. |
349
|
574
|
50
|
|
|
|
1631
|
if ($filter == 0) { |
|
|
100
|
|
|
|
|
|
|
|
100
|
|
|
|
|
|
|
|
50
|
|
|
|
|
|
|
|
50
|
|
|
|
|
|
350
|
0
|
|
|
|
|
0
|
$clear = $line; |
351
|
|
|
|
|
|
|
} |
352
|
|
|
|
|
|
|
elsif ($filter == 1) { |
353
|
18
|
|
|
|
|
49
|
foreach my $x (0 .. length($line) - 1) { |
354
|
27360
|
|
|
|
|
56534
|
vec($clear, $x, 8) = (vec($line, $x, 8) + vec($clear, $x - $bpp, 8)) % 256; |
355
|
|
|
|
|
|
|
} |
356
|
|
|
|
|
|
|
} |
357
|
|
|
|
|
|
|
elsif ($filter == 2) { |
358
|
494
|
|
|
|
|
1096
|
foreach my $x (0 .. length($line) - 1) { |
359
|
750880
|
|
|
|
|
1526882
|
vec($clear, $x, 8) = (vec($line, $x, 8) + vec($prev, $x, 8)) % 256; |
360
|
|
|
|
|
|
|
} |
361
|
|
|
|
|
|
|
} |
362
|
|
|
|
|
|
|
elsif ($filter == 3) { |
363
|
0
|
|
|
|
|
0
|
foreach my $x (0 .. length($line) - 1) { |
364
|
0
|
|
|
|
|
0
|
vec($clear, $x, 8) = (vec($line, $x, 8) + floor((vec($clear, $x - $bpp, 8) + vec($prev, $x, 8)) / 2)) % 256; |
365
|
|
|
|
|
|
|
} |
366
|
|
|
|
|
|
|
} |
367
|
|
|
|
|
|
|
elsif ($filter == 4) { |
368
|
62
|
|
|
|
|
166
|
foreach my $x (0 .. length($line) - 1) { |
369
|
94240
|
|
|
|
|
226458
|
vec($clear,$x,8) = (vec($line, $x, 8) + PaethPredictor(vec($clear, $x - $bpp, 8), vec($prev, $x, 8), vec($prev, $x - $bpp, 8))) % 256; |
370
|
|
|
|
|
|
|
} |
371
|
|
|
|
|
|
|
} |
372
|
|
|
|
|
|
|
|
373
|
574
|
|
|
|
|
1164
|
$prev = $clear; |
374
|
574
|
|
|
|
|
1329
|
foreach my $x (0 .. ($width * $comp) - 1) { |
375
|
872480
|
|
|
|
|
1725984
|
vec($clearstream, ($n * $width * $comp) + $x, $bpc) = vec($clear, $x, $bpc); |
376
|
|
|
|
|
|
|
} |
377
|
|
|
|
|
|
|
} |
378
|
|
|
|
|
|
|
} |
379
|
2
|
|
|
|
|
1125
|
return $clearstream; |
380
|
|
|
|
|
|
|
} |
381
|
|
|
|
|
|
|
|
382
|
|
|
|
|
|
|
1; |
383
|
|
|
|
|
|
|
|
384
|
|
|
|
|
|
|
__END__ |