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| author | Ray Johnston <ray.johnston@artifex.com> | 2021-03-19 11:51:11 -0700 |
|---|---|---|
| committer | Ray Johnston <ray.johnston@artifex.com> | 2021-03-22 10:07:03 -0700 |
| commit | fd919a2ed8b39b91e43ee6202207de6fe9929002 (patch) | |
| tree | 221f833b8f65056f21fcab104650fc80291afec3 | |
| parent | 0583cf70c06e8041af1a639e7e3ee6e41ecb2b76 (diff) | |
| download | ghostpdl-fd919a2ed8b39b91e43ee6202207de6fe9929002.tar.gz | |
Bug 703246: Improve the efficiency of CMap processing
Thanks to Peter Cherepanov for this patch, This improves the performance
of the file mentioned in Comment #8 of bug 702381.
complaints (that I can recall) about the performance, b
| -rw-r--r-- | Resource/Init/gs_cmap.ps | 51 |
1 files changed, 34 insertions, 17 deletions
diff --git a/Resource/Init/gs_cmap.ps b/Resource/Init/gs_cmap.ps index 0c2e14215..111043867 100644 --- a/Resource/Init/gs_cmap.ps +++ b/Resource/Init/gs_cmap.ps @@ -224,11 +224,19 @@ /beginbfchar { % <count> beginbfchar - pop mark } bind def -/endbfchar { % <code> <to_code|charname> ... endbfchar - counttomark 2 idiv { - counttomark -2 roll % process in correct order - .addbfchar - } repeat 1 .appendmap +/endbfchar { % [ <code> <to_code|charname> ... endbfchar + ] [ //true % [<da><ta>] [ true + 3 -1 roll % [ true [<da><ta>] + { + exch { + //false % [ <da> false + } { % [ <da> <ta> + .addbfchar % [ prefix params key value font_index + //true + } ifelse + } forall + pop + 1 .appendmap } bind def /beginbfrange { % <count> beginbfrange - @@ -236,26 +244,35 @@ } bind def /endbfrange { % <code_lo> <code_hi> <to_code|(charname*)> ... % endbfrange - - counttomark 3 idiv { - counttomark -3 roll % process in correct order - dup type dup /arraytype eq exch /packedarraytype eq or { + ] [ 0 % [<da><ta><set>] [ 0 + 3 -1 roll % [ 0 [<da><ta><set>] + { + exch % [ <da> 0 + { 1 2 + { + dup type dup /arraytype eq exch /packedarraytype eq or { % Array value, split up. - exch pop { + exch pop { % Stack: code to_code|charname - 1 index exch .addbfchar + 1 index exch .addbfchar % Increment the code. As noted above, we require % that only the last byte vary, but we still must % mask it after incrementing, in case the last % value was 0xff. % Stack: code prefix params key value fontindex - 6 -1 roll dup length string copy - dup dup length 1 sub 2 copy get 1 add 255 and put - } forall pop - } { + 6 -1 roll dup length string copy + dup dup length 1 sub 2 copy get 1 add 255 and put + } forall pop + } { % Single value, handle directly. - .addbfrange - } ifelse - } repeat 1 .appendmap + .addbfrange + } ifelse + 0 + } + } exch get exec + } forall + pop + 1 .appendmap } bind def /.addbfchar { % <code> <to_code|charname> .addbfchar |