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lib/AAC/Pvoice/Bitmap.pm  view on Meta::CPAN

}

sub wxColor2hex
{
    my $color = shift;
    my $red   = $color->Red();
    my $green = $color->Green();
    my $blue  = $color->Blue();
    return sprintf("#%0x%0x%0x", $red,$green,$blue);
}

sub ReadImageMagick
{
    my $file = shift;
    my ($x, $y, $caption, $bgcolor, $blowup, $parent_background) = @_;
    confess "MaxX and MaxY should be positive" if $x < 1 || $y < 1;
    return DrawCaption($x, $y, '?', $bgcolor, $parent_background) unless -r $file;

    $caption ||='';
    $blowup ||=0;
    $bgcolor = $parent_background unless defined $bgcolor;

    my $ibg = wxColor2hex($bgcolor) if (ref($bgcolor) eq 'Wx::Colour');
    my $pbg = wxColor2hex($parent_background) if (ref($parent_background) eq 'Wx::Colour');

    my $stat = stat($file);
    my $mtime = $stat->mtime();
    my $image = $cache->get("$file-$x-$y-$caption-$ibg-$blowup-$pbg-$mtime");
    if (!$image)
    {
    	my $radius = 10;
    	my $svg = <<SVG;
<svg width="$x" height="$y" viewBox="0 0 $x $y">
   <rect x="0" y="0" width="$x" height="$y" ry="$radius"
       style="stroke: none; fill: $ibg;"/>
</svg>
SVG
    	my $background=Image::Magick->new(magick => 'svg');
    	$background->Set('background' => $pbg);
    	$background->blobtoimage($svg);
        
    	my ($textheight, $textwidth) = (0,0);
    	if ($caption)
    	{
    	    my $pt = 20;
    	    do {
    		(undef, undef, undef, undef, $textwidth, $textheight, undef) =
    		    $background->QueryFontMetrics(text => $caption, font => 'Comic-Sans-MS', pointsize => $pt, gravity => 'South');
    		    $pt--;
    		} until ($textwidth < $x) && ($textheight < $y/5);
    	    $background->Annotate(text => $caption, font => 'Comic-Sans-MS', pointsize => $pt, gravity => 'South');
    	}
        
    	# Read the actual image
    	my $img = Image::Magick->new;
        
    	my $rc = $img->Read($file);
    	carp "Can't read $file: $rc" if $rc;
        # wmf files have a white background color by default
        # if we can't get the matte color for the image, we assume
        # that white can be used as the transparent color...
    	$img->Transparent(color => 'white') if (!$img->Get('matte') || $file =~ /wmf$/i);
    	my $w = $img->Get('width');
    	my $h = $img->Get('height');
    	my $ch = $textheight;
    	if (($w > $x) || ($h > ($y-$ch)))
    	{
    	    my ($newx, $newy) = ($w, $h);
    	    if ($w > $x)
    	    {
    		my $factor = $w/$x;
    		return wxNullBitmap if not $factor;
    		$newy = int($h/$factor);
    		($w,$h) = ($x, $newy);
    	    }
    	    if ($h > ($y-$ch))
    	    {
    		my $factor = $h/($y-$ch);
    		return wxNullBitmap if not $factor;
    		($w, $h) = (int($w/$factor),$y-$ch);
    	    }
    	    $img->Thumbnail(height => $h, width =>$w );
    	}
    	elsif ($blowup)
    	{
    	    # Do we really want to blow up images that are too small??
    	    my $factor = $w/$x;
    	    return wxNullBitmap if not $factor;
    	    my $newy = int($h/$factor);
    	    ($w,$h) = ($x, $newy);
    	    if ($h > ($y-$ch))
    	    {
    		my $factor = $h/($y-$ch);
    		return wxNullBitmap if not $factor;
    		($w, $h) = (int($w/$factor),$y-$ch);
    	    }
    	    $img->Resize(height => $h, width =>$w );
    	}
        
    	$img->Border(width  => int(($x - $img->Get('width'))/2) - $radius/2,
    		      height => int((($y-$textheight) - $img->Get('height'))/2) - $radius/2,
    		      fill   => $ibg);
    	
    	# Call the Composite method of the background image, with the logo image as an argument.
    	$background->Composite(image=>$img,compose=>'over', gravity => 'North');
    	$background->Set(quality=>100);
    	$background->Set(magick => 'png');
    	$image = $background->imagetoblob();
    	$cache->set("$file-$x-$y-$caption-$ibg-$blowup-$pbg-$mtime", $image);	
    	undef $background;
    	undef $img;
    }
    
    my $fh = IO::Scalar->new(\$image); 	 

    my $contenttype = 'image/png'; 
    return Wx::Bitmap->new(Wx::Image->newStreamMIME($fh,  $contenttype)) 
}

END
{