Bug 32102 - Create A1 instead of A8 image in imagemask
Summary: Create A1 instead of A8 image in imagemask
Status: RESOLVED FIXED
Alias: None
Product: poppler
Classification: Unclassified
Component: cairo backend (show other bugs)
Version: unspecified
Hardware: Other All
: medium normal
Assignee: poppler-bugs
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Reported: 2010-12-04 06:14 UTC by Adrian Johnson
Modified: 2010-12-14 02:57 UTC (History)
0 users

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Attachments
use A1 instead of A8 in drawImageMask (1.97 KB, patch)
2010-12-04 06:14 UTC, Adrian Johnson 		Details | Splinter Review
use A1 instead of A8 for imagemask (2.74 KB, patch)
2010-12-13 14:39 UTC, Adrian Johnson 		Details | Splinter Review
Show Obsolete (1) View All

Description Adrian Johnson 2010-12-04 06:14:14 UTC 
Created attachment 40801 [details] [review]
use A1 instead of A8 in drawImageMask

Poppler is using an A8 image surface to store an A1 mask. The cairo PDF surface can use an A1 mask a lot more efficiently as it can output a stencil mask instead of a softmask.
Comment 1 Albert Astals Cid 2010-12-13 05:50:37 UTC 
I'm a bit concerned about WORDS_BIGENDIAN, where is supposed to be defined?
Comment 2 Adrian Johnson 2010-12-13 13:41:41 UTC 
(In reply to comment #1)
> I'm a bit concerned about WORDS_BIGENDIAN, where is supposed to be defined?

I found it is defined by autoconf. I had a look to see if there is a cmake equivalent. According to the cmake manual something like this should work:

  test_big_endian(WORDS_BIGENDIAN)

but as I don't have any big endian machines I can't test it.
Comment 3 Adrian Johnson 2010-12-13 14:39:10 UTC 
Created attachment 41095 [details] [review]
use A1 instead of A8 for imagemask

Updated patch with autoconf and cmake tests for WORDS_BIGENDIAN.
Comment 4 Albert Astals Cid 2010-12-13 22:51:47 UTC 
@Carlos: Tested the pdf rendering (to png) and the results are the same as expected.
Comment 5 Carlos Garcia Campos 2010-12-14 02:57:06 UTC 
Pushed to git master, thanks Adrian!

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