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|
#!/usr/bin/perl
use strict;
use warnings;
use utf8;
use lib "../lib";
use PDF::API2;
use Text::Layout;
use Text::Layout::FontConfig;
use HarfBuzz::Shaper 0.026;
# Create document and graphics environment.
my $pdf = PDF::API2->new();
$pdf->mediabox( 595, 842 ); # A4
# Set up page and get the text context.
my $page = $pdf->page;
my $text = $page->text;
my $gfx = $page->gfx;
# Create a layout instance.
my $layout = Text::Layout->new($pdf);
my $PANGO_SCALE;
sub main {
# Select a font.
my $font = Text::Layout::FontConfig->from_string("Sans 44");
$layout->set_font_description($font);
# Start...
my $x = 0;
my $y = 700;
# Text to render.
$layout->set_markup( q{ Áhe <i><span foreground="red">quick</span> <span size="20"><b>brown</b></span></i> fox } );
# Left align text.
$layout->set_width( 595 * $PANGO_SCALE );
$layout->set_alignment("left");
# Render it.
showlayout( $x, $y );
$y -= 100;
# Right align text.
$layout->set_width( 595 * $PANGO_SCALE );
$layout->set_alignment("right");
# Render it.
showlayout( $x, $y );
$y -= 100;
$text->font( $font->{font}, 44);
$text->translate( $x, $y-50 );
my $txt_nomarkup = q{Áhe quick brown fox};
my $dx = $text->text($txt_nomarkup);
if ( $font->{font}->can("extents") ) {
my $e = $font->{font}->extents( $txt_nomarkup, 44 );
printf( "EXT: %.2f %.2f %.2f %.2f\n", @$e{qw( x y width height )} );
$gfx->save;
$gfx->translate( $x, $y-50 );
# PDF::API2 text is baseline oriented, so are the extents.
# So we can draw the BB at the same origin as the text.
$gfx->rect( $e->{x}, $e->{y}, $e->{width}, $e->{height} );
$gfx->linewidth(0.5);
$gfx->strokecolor("cyan");
$gfx->stroke;
$gfx->restore;
}
# Draw baseline.
$gfx->save;
$gfx->translate( $x, $y-50 );
$gfx->move( 0, 0 );
$gfx->line( $dx, 0 );
$gfx->linewidth(0.5);
$gfx->strokecolor("magenta");
$gfx->stroke;
$gfx->restore;
$y -= 100;
# Text to render.
# $layout->set_markup( q{Áhe quick brown fox} );
# Right align text.
$layout->set_width( 595 * $PANGO_SCALE );
$layout->set_alignment("center");
# Render it.
showlayout( $x, $y );
$y -= 100;
# This will only work properly with the HarfBuzz driver.
$font = Text::Layout::FontConfig->from_string("Deva 60");
$layout->set_font_description($font);
$layout->set_width( 595 * $PANGO_SCALE );
# Nepali is LTR.
$layout->set_alignment("left");
# This text consists of 6 characters but will render 4 glyphs.
my $phrase =
"\N{DEVANAGARI LETTER TA}".
"\N{DEVANAGARI LETTER MA}".
"\N{DEVANAGARI VOWEL SIGN AA}".
"\N{DEVANAGARI LETTER NGA}".
"\N{DEVANAGARI SIGN VIRAMA}".
"\N{DEVANAGARI LETTER GA}".
qq{ <span font="sans 20"> this should look like THIS</span>};
$layout->set_markup($phrase);
showlayout( $x, $y );
# Ship out.
$pdf->saveas("tl_c_02.pdf");
}
################ Subroutines ################
sub showlayout {
my ( $x, $y ) = @_;
$layout->show( $x, $y, $text);
$layout->showbb($gfx);
}
sub setup_fonts {
$^O =~ /mswin/i ? setup_fonts_windows() : setup_fonts_linux();
}
sub setup_fonts_linux {
# Register all corefonts. Useful for fallback.
# Not required, skip if you have your own fonts.
my $fd = Text::Layout::FontConfig->new;
# $fd->register_corefonts;
# Add font dir and register fonts.
$fd->add_fontdirs( ".", $ENV{HOME}."/.fonts", "/usr/share/fonts/" );
# Add a Sans family.
$fd->register_font( "DejaVuSans.ttf", "Sans" );
$fd->register_font( "DejaVuSans-Bold.ttf", "Sans", "Bold" );
$fd->register_font( "DejaVuSans-Oblique.ttf", "Sans", "Italic" );
$fd->register_font( "DejaVuSans-BoldOblique.ttf", "Sans", "BoldItalic" );
# Add Devanagari. Requires shaping.
# Note that Nepali is a LTR language.
$fd->register_font( "Lohit-Devanagari.ttf",
"Deva", "", "",
{ shaping => 1,
language => 'nepali'
} );
}
sub setup_fonts_windows {
# Register all corefonts. Useful for fallback.
# Not required, skip if you have your own fonts.
my $fd = Text::Layout::FontConfig->new;
# $fd->register_corefonts;
# Add font dir and register fonts.
$fd->add_fontdirs( ".", "C:\\Windows\\Fonts" );
$fd->register_font( "arial.ttf", "sans", "" );
$fd->register_font( "arialbd.ttf", "sans", "bold" );
$fd->register_font( "ariali.ttf", "sans", "italic" );
$fd->register_font( "arialbi.ttf", "sans", "bolditalic" );
# Add Devanagari. Requires shaping.
# Note that Nepali is a LTR language.
$fd->register_font( "Lohit-Devanagari.ttf",
"Deva", "", "",
{ shaping => 1,
language => 'nepali'
} );
}
################ Main entry point ################
# Setup the fonts.
setup_fonts();
if ( @ARGV ) {
# For compliancy, use Pango units;
$PANGO_SCALE = $layout->set_pango_mode("on");
}
else {
$PANGO_SCALE = 1;
}
main();
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