-package Maasha::BBrowser::Draw;
+package Maasha::BGB::Draw;
# Copyright (C) 2009 Martin A. Hansen.
use Cairo;
use Pango;
use MIME::Base64;
+use POSIX;
use vars qw( @ISA @EXPORT );
# Returns nothing.
- my ( $feature );
+ my ( $feature, $first );
+
+ $first = 1;
foreach $feature ( @{ $features } )
{
$cr->move_to( $feature->{ 'x1' }, $feature->{ 'y1' } );
$cr->line_to( $feature->{ 'x2' }, $feature->{ 'y2' } );
}
+ elsif ( $feature->{ 'type' } eq 'grid' )
+ {
+ $cr->set_line_width( $feature->{ 'line_width' } );
+ $cr->move_to( $feature->{ 'x1' }, $feature->{ 'y1' } );
+ $cr->line_to( $feature->{ 'x2' }, $feature->{ 'y2' } );
+ }
+ elsif ( $feature->{ 'type' } eq 'wiggle' )
+ {
+ $cr->set_line_width( $feature->{ 'line_width' } );
+
+ if ( $first )
+ {
+ $cr->move_to( $feature->{ 'x1' }, $feature->{ 'y1' } );
+
+ undef $first;
+ }
+
+ $cr->line_to( $feature->{ 'x1' }, $feature->{ 'y2' } );
+ $cr->line_to( $feature->{ 'x2' }, $feature->{ 'y2' } );
+ }
+ elsif ( $feature->{ 'type' } eq 'arrow' )
+ {
+ draw_arrow_horizontal(
+ $cr,
+ $feature->{ 'x1' },
+ $feature->{ 'y1' },
+ $feature->{ 'x2' },
+ $feature->{ 'y2' },
+ $feature->{ 'strand' },
+ );
+
+ }
elsif ( $feature->{ 'type' } eq 'rect' )
{
$cr->rectangle(
$feature->{ 'x1' },
$feature->{ 'y1' },
- $feature->{ 'x2' } - $feature->{ 'x1' },
- $feature->{ 'y2' } - $feature->{ 'y1' },
+ $feature->{ 'x2' } - $feature->{ 'x1' } + 1,
+ $feature->{ 'y2' } - $feature->{ 'y1' } + 1,
);
$cr->fill;
$cr->set_font_size( $feature->{ 'font_size' } );
$cr->show_text( $feature->{ 'txt' } );
}
+ elsif ( $feature->{ 'type' } eq 'track_name' )
+ {
+ $cr->move_to( $feature->{ 'x1' }, $feature->{ 'y1' } );
+ $cr->set_font_size( $feature->{ 'font_size' } );
+ $cr->show_text( $feature->{ 'txt' } );
+ }
+
+ #$cr->stroke;
+ }
+
+ $cr->fill_preserve;
+ $cr->stroke;
+}
+
+
+sub draw_arrow_horizontal
+{
+ # Draws a horizontal arraw that
+ # consists of a shaft and arrow head.
+
+ my ( $cr, # Cairo::Context object
+ $x1,
+ $y1,
+ $x2,
+ $y2,
+ $strand,
+ ) = @_;
+
+ # Returns nothing.
+
+ my ( $x_diff, $y_diff, $mid, $width, $s_width );
+
+ $x_diff = abs( $x2 - $x1 );
+ $y_diff = abs( $y2 - $y1 );
+
+ $mid = $y_diff / 2;
+
+ if ( $x_diff < $mid ) {
+ $width = $x_diff;
+ } else {
+ $width = $mid;
+ }
+
+ # Draw arrow head
+
+ $cr->set_line_width( 1 );
+
+ if ( $strand eq '+' )
+ {
+ $cr->move_to( $x2 - $width, $y1 );
+ $cr->line_to( $x2, $y1 + $mid );
+ $cr->line_to( $x2 - $width, $y2 );
+ }
+ else
+ {
+ $cr->move_to( $x1 + $width, $y1 );
+ $cr->line_to( $x1, $y1 + $mid );
+ $cr->line_to( $x1 + $width, $y2 );
+ }
+
+ $cr->close_path;
+ $cr->fill_preserve;
+ $cr->stroke;
+
+ # Draw arrow shaft
+
+ if ( $x_diff > $mid )
+ {
+ if ( $strand eq '+' ) {
+ $cr->rectangle( $x1, $y1, ( $x2 - $width ) - $x1, $y2 - $y1 );
+ } else {
+ $cr->rectangle( $x1 + $width, $y1, $x2 - ( $x1 + $width ), $y2 - $y1 );
+ }
+ $cr->fill_preserve;
$cr->stroke;
}
}
[ 130, 70, 70 ],
[ 70, 170, 130 ],
[ 130, 170, 50 ],
+ [ 30, 130, 130 ],
+ [ 30, 50, 150 ],
+ [ 130, 130, 50 ],
+ [ 130, 90, 130 ],
+ [ 130, 70, 70 ],
+ [ 70, 170, 130 ],
+ [ 130, 170, 50 ],
+ [ 30, 130, 130 ],
+ [ 30, 50, 150 ],
+ [ 130, 130, 50 ],
+ [ 130, 90, 130 ],
+ [ 130, 70, 70 ],
+ [ 70, 170, 130 ],
+ [ 130, 170, 50 ],
];
-
+
$color = $palette->[ $i ];
-
+
map { $_ /= 255 } @{ $color };
return $color;
}
+sub render_png
+{
+ # Martin A. Hansen, March 2010.
+
+ # Given a list of BGB tracks, render the
+ # PNG surface stream and return the base64
+ # encoded PNG data.
+
+ my ( $width, # image width
+ $height, # image height
+ $tracks, # list of BGB tracks to render
+ ) = @_;
+
+ # Returns a string.
+
+ my ( $surface, $cr, $track, $png_data );
+
+ $surface = Cairo::ImageSurface->create( 'argb32', $width, $height );
+ $cr = Cairo::Context->create( $surface );
+
+ $cr->rectangle( 0, 0, $width, $height );
+ $cr->set_source_rgb( 1, 1, 1 );
+ $cr->fill;
+
+ foreach $track ( @{ $tracks } ) {
+ draw_feature( $cr, $track ) if $track;
+ }
+
+ $png_data = base64_png( $surface );
+
+ return $png_data;
+}
+
+
+sub render_pdf_file
+{
+ # Martin A. Hansen, March 2010.
+
+ # Given a list of BGB tracks, render these and save
+ # to a PDF file.
+
+ my ( $file, # path to PDF file
+ $width, # image width
+ $height, # image height
+ $tracks, # list of BGB tracks to render
+ ) = @_;
+
+ # Returns nothing.
+
+ my ( $surface, $cr, $track );
+
+ $surface = Cairo::PdfSurface->create ( $file, $width, $height );
+ $cr = Cairo::Context->create( $surface );
+
+ $cr->rectangle( 0, 0, $width, $height );
+ $cr->set_source_rgb( 1, 1, 1 );
+ $cr->fill;
+
+ foreach $track ( @{ $tracks } ) {
+ draw_feature( $cr, $track ) if $track;
+ }
+}
+
+
+sub render_svg_file
+{
+ # Martin A. Hansen, March 2010.
+
+ # Given a list of BGB tracks, render these and save
+ # to a SVG file.
+
+ my ( $file, # path to PDF file
+ $width, # image width
+ $height, # image height
+ $tracks, # list of BGB tracks to render
+ ) = @_;
+
+ # Returns nothing.
+
+ my ( $surface, $cr, $track );
+
+ $surface = Cairo::SvgSurface->create ( $file, $width, $height );
+ $cr = Cairo::Context->create( $surface );
+
+ $cr->rectangle( 0, 0, $width, $height );
+ $cr->set_source_rgb( 1, 1, 1 );
+ $cr->fill;
+
+ foreach $track ( @{ $tracks } ) {
+ draw_feature( $cr, $track ) if $track;
+ }
+}
+
+
sub file_png
{
# Martin A. Hansen, October 2009.
}
+sub get_distinct_colors
+{
+ # Martin A. Hansen, November 2003.
+
+ # returns a number of distinct colors
+
+ my ( $num_colors
+ ) = @_;
+
+ # returns triplet of colors [ 0, 255, 127 ]
+
+ my ( $num_discrete, @color_vals, $c, @colors, $r_idx, $g_idx, $b_idx, $i );
+
+ $num_discrete = POSIX::ceil( $num_colors ** ( 1 / 3 ) );
+
+ @color_vals = map {
+ $c = 1 - ($_ / ($num_discrete - 1) );
+ $c < 0 ? 0 : ($c > 1 ? 1 : $c);
+ } 0 .. $num_discrete;
+
+ ( $r_idx, $g_idx, $b_idx ) = ( 0, 0, 0 );
+
+ foreach $i ( 1 .. $num_colors )
+ {
+ push @colors, [ @color_vals [ $r_idx, $g_idx, $b_idx ] ];
+
+ if ( ++$b_idx >= $num_discrete )
+ {
+ if ( ++$g_idx >= $num_discrete ) {
+ $r_idx = ( $r_idx + 1 ) % $num_discrete;
+ }
+
+ $g_idx %= $num_discrete;
+ }
+
+ $b_idx %= $num_discrete;
+ }
+
+ @colors = map { [ int( $_->[ 0 ] * 255), int( $_->[ 1 ] * 255), int( $_->[ 2 ] * 255 ) ] } @colors;
+
+ return wantarray ? @colors : \@colors;
+}
+
+
# >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
1;
projects / biopieces.git / blobdiff