| … | |
… | |
| 306 | =item merge $img ... |
306 | =item merge $img ... |
| 307 | |
307 | |
| 308 | Takes any number of images and merges them together, creating a single |
308 | Takes any number of images and merges them together, creating a single |
| 309 | image containing them all. |
309 | image containing them all. |
| 310 | |
310 | |
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311 | This function is called automatically when an expression returns multiple |
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|
312 | images. |
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313 | |
| 311 | =cut |
314 | =cut |
| 312 | |
315 | |
| 313 | sub merge(@) { |
316 | sub merge(@) { |
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317 | return $_[0] unless $#_; |
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318 | |
| 314 | # rather annoyingly clumsy, but optimisation is for another time |
319 | # rather annoyingly clumsy, but optimisation is for another time |
| 315 | |
320 | |
| 316 | my $x0 = +1e9; |
321 | my $x0 = +1e9; |
| 317 | my $y0 = +1e9; |
322 | my $y0 = +1e9; |
| 318 | my $x1 = -1e9; |
323 | my $x1 = -1e9; |
| … | |
… | |
| 905 | ($x, $y, $w, $h) = |
910 | ($x, $y, $w, $h) = |
| 906 | $self->background_geometry ($self->{border}); |
911 | $self->background_geometry ($self->{border}); |
| 907 | |
912 | |
| 908 | # evaluate user expression |
913 | # evaluate user expression |
| 909 | |
914 | |
| 910 | my $img = eval { $self->{expr}->() }; |
915 | my $img = eval { urxvt::bgdsl::merge $self->{expr}->() }; |
| 911 | warn $@ if $@;#d# |
916 | die $@ if $@; |
| 912 | die "background-expr did not return an image.\n" if !UNIVERSAL::isa $img, "urxvt::img"; |
917 | die "background-expr did not return an image.\n" if !UNIVERSAL::isa $img, "urxvt::img"; |
| 913 | |
918 | |
| 914 | # if the expression is sensitive to external events, prepare reevaluation then |
919 | # if the expression is sensitive to external events, prepare reevaluation then |
| 915 | |
920 | |
| 916 | my $again = delete $state->{again}; |
921 | my $again = delete $state->{again}; |
