Re: Fix for 687056, Cannot display PDF file

Please commit.

Igor.

----- Original Message ----- 
From: "Alex Cherepanov" <[email protected]>
To: "gs-code-review" <[email protected]>; "Igor V. Melichev"
<[email protected]>
Sent: Tuesday, September 30, 2003 1:36 PM
Subject: Fix for 687056, Cannot display PDF file


> Handle the case of missing /BitsPerComponent key.
> Fix bug 687956.
>
>


----------------------------------------------------------------------------
----


> Index: gs/lib/pdf_draw.ps
> ===================================================================
> RCS file: /cvs/ghostscript/gs/lib/pdf_draw.ps,v
> retrieving revision 1.75
> diff -b -u -r1.75 pdf_draw.ps
> --- gs/lib/pdf_draw.ps 16 Sep 2003 07:11:15 -0000 1.75
> +++ gs/lib/pdf_draw.ps 30 Sep 2003 09:05:50 -0000
> @@ -821,7 +821,8 @@
>    begin
>    /Width 2 copy oget def
>    /Height 2 copy oget def
> -  /BitsPerComponent 2 copy oget def
> + % Handle missing BitsPerComponent later.
> +  /BitsPerComponent 2 copy knownoget { def } { pop } ifelse
>    /Interpolate 2 copy knownoget { def } { pop } ifelse
>    makeimagekeys
>  } bdef
> @@ -838,9 +839,7 @@
>   % Decode is required for the PostScript image operators.
>                  % AI8 writes bogus decode array [0 1 0 0 0 0 0 0]
>      /Decode 2 copy knownoget { 0 2 getinterval } { //01_1 } ifelse def
> - % BitsPerComponent may be missing for masks.
> - % The spec requires it, but some producers omit it, and
> - % Acrobat Reader doesn't care.
> + % BitsPerComponent is optional for masks.
>      /BitsPerComponent 2 copy known { pop } { 1 def } ifelse
>      true
>    } {
>