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166 Commits

Author SHA1 Message Date
senorblanco
b0e89dcc1d Fix image filters for PDF backend. 
Currently, the PDF backend does not support image filters (since PDF
does not have that functionality), so it simply removes them. This is
causing Chrome print preview to render incorrectly (see bug). The fix
here is to fall back to a raster device for image filters, as we used
to do in Blink. The resulting bitmap will be drawn to the destination
device as a normal main-memory-backed bitmap.

Note: this change invalidates the PDF results of all GMs containing
image filters (since they'll actually be rendered).

BUG=422144

Review URL: https://codereview.chromium.org/644323006
 2014-10-20 14:03:13 -07:00
fmalita
05c4a4322e Revert of Revert of Fix SkTextBlob offset semantics. (patchset #1 id:1 of https://codereview.chromium.org/609223003/) 
Reason for revert:
Re-landing: Chromium-side fix to be landed with the roll (https://codereview.chromium.org/607853003/)

Original issue's description:
> Revert of Fix SkTextBlob offset semantics. (patchset #2 id:20001 of https://codereview.chromium.org/605533002/)
>
> Reason for revert:
> Breaking the Chrome builds with the error:
>
> [14:54:14.317833] ../../skia/ext/pixel_ref_utils.cc:221:16: error: 'drawPosText' marked 'override' but does not override any member functions
> [14:54:14.318022]   virtual void drawPosText(const SkDraw& draw,
> [14:54:14.318082]                ^
>
> Original issue's description:
> > Fix SkTextBlob offset semantics.
> >
> > Implement proper x/y drawTextBlob() handling by plumbing a
> > drawPosText() offset parameter (to act as an additional glyph pos
> > translation) throughout the device layer.
> >
> > The new offset superceeds the existing constY, with a minor semantic
> > tweak: whereas previous implementations were ignoring constY in 2D
> > positioning mode (scalarsPerGlyph == 2), now the offset is always
> > observed, in all positioning modes. We can do this because existing
> > drawPosText() clients always pass constY == 0 for full positioning mode.
> >
> > R=reed@google.com, jvanverth@google.com, robertphillips@google.com
> >
> > Committed: https://skia.googlesource.com/skia/+/c13bc571d3e61a43b87eb97f0719abd304cafaf2
>
> TBR=jvanverth@google.com,reed@google.com,bsalomon@google.com,fmalita@chromium.org
> NOTREECHECKS=true
> NOTRY=true
>
> Committed: https://skia.googlesource.com/skia/+/d46b8d2bab7cfba8458432248e1568ac377429e9

R=jvanverth@google.com, reed@google.com, bsalomon@google.com, robertphillips@google.com
TBR=bsalomon@google.com, jvanverth@google.com, reed@google.com, robertphillips@google.com
NOTREECHECKS=true
NOTRY=true

Author: fmalita@chromium.org

Review URL: https://codereview.chromium.org/607413003
 2014-09-29 06:29:53 -07:00
robertphillips
d46b8d2bab Revert of Fix SkTextBlob offset semantics. (patchset #2 id:20001 of https://codereview.chromium.org/605533002/) 
Reason for revert:
Breaking the Chrome builds with the error:

[14:54:14.317833] ../../skia/ext/pixel_ref_utils.cc:221:16: error: 'drawPosText' marked 'override' but does not override any member functions
[14:54:14.318022]   virtual void drawPosText(const SkDraw& draw,
[14:54:14.318082]                ^

Original issue's description:
> Fix SkTextBlob offset semantics.
>
> Implement proper x/y drawTextBlob() handling by plumbing a
> drawPosText() offset parameter (to act as an additional glyph pos
> translation) throughout the device layer.
>
> The new offset superceeds the existing constY, with a minor semantic
> tweak: whereas previous implementations were ignoring constY in 2D
> positioning mode (scalarsPerGlyph == 2), now the offset is always
> observed, in all positioning modes. We can do this because existing
> drawPosText() clients always pass constY == 0 for full positioning mode.
>
> R=reed@google.com, jvanverth@google.com, robertphillips@google.com
>
> Committed: https://skia.googlesource.com/skia/+/c13bc571d3e61a43b87eb97f0719abd304cafaf2

R=jvanverth@google.com, reed@google.com, bsalomon@google.com, fmalita@chromium.org
TBR=bsalomon@google.com, fmalita@chromium.org, jvanverth@google.com, reed@google.com
NOTREECHECKS=true
NOTRY=true

Author: robertphillips@google.com

Review URL: https://codereview.chromium.org/609223003
 2014-09-29 04:48:52 -07:00
Florin Malita
c13bc571d3 Fix SkTextBlob offset semantics. 
Implement proper x/y drawTextBlob() handling by plumbing a
drawPosText() offset parameter (to act as an additional glyph pos
translation) throughout the device layer.

The new offset superceeds the existing constY, with a minor semantic
tweak: whereas previous implementations were ignoring constY in 2D
positioning mode (scalarsPerGlyph == 2), now the offset is always
observed, in all positioning modes. We can do this because existing
drawPosText() clients always pass constY == 0 for full positioning mode.

R=reed@google.com, jvanverth@google.com, robertphillips@google.com

Review URL: https://codereview.chromium.org/605533002
 2014-09-26 10:33:37 -04:00
reed
4a8126e7f8 Introduce Props to surface (patchset #27 id:520001 of https://codereview.chromium.org/551463004/)" 
This reverts commit 29c857d0f3.

TBR=

Author: reed@google.com

Review URL: https://codereview.chromium.org/588143004
 2014-09-22 07:29:03 -07:00
reed
29c857d0f3 Revert of introduce Props to surface (patchset #27 id:520001 of https://codereview.chromium.org/551463004/) 
Reason for revert:
Broke call site in WebKit

Original issue's description:
> introduce Props to surface (work in progress)
>
> BUG=skia:
>
> Committed: https://skia.googlesource.com/skia/+/3716fd067a5621bb94a6cb08d72afec8bf3aceda

R=robertphillips@google.com, bsalomon@google.com, jvanverth@google.com, bungeman@google.com, fmalita@google.com, vangelis@chromium.org, reed@google.com
TBR=bsalomon@google.com, bungeman@google.com, fmalita@google.com, jvanverth@google.com, reed@google.com, robertphillips@google.com, vangelis@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Author: reed@chromium.org

Review URL: https://codereview.chromium.org/583773004
 2014-09-21 10:25:07 -07:00
reed
3716fd067a introduce Props to surface (work in progress) 
BUG=skia:
R=robertphillips@google.com, bsalomon@google.com, jvanverth@google.com, bungeman@google.com, fmalita@google.com, vangelis@chromium.org, reed@chromium.org

Author: reed@google.com

Review URL: https://codereview.chromium.org/551463004
 2014-09-21 09:39:55 -07:00
reed
89443aba5b change gpudevice and pdfdevice to inherit from basedevice 
BUG=skia:
R=robertphillips@google.com

Author: reed@google.com

Review URL: https://codereview.chromium.org/354133002
 2014-06-27 11:34:19 -07:00
vandebo
0f9bad01b0 [PDF] Fix font embedding restrictions. 
Stop using restricted font outlines and honor don't subset restriction.

Resubmit of r12600.

R=halcanary@google.com, bungeman@google.com, reed@google.com

Author: vandebo@chromium.org

Review URL: https://codereview.chromium.org/334443002
 2014-06-19 11:05:39 -07:00
reed@google.com
f20fc24a7d remove all references to legacy Config8888 
BUG=skia:
R=bsalomon@google.com

Review URL: https://codereview.chromium.org/211043002

git-svn-id: http://skia.googlecode.com/svn/trunk@13952 2bbb7eff-a529-9590-31e7-b0007b416f81
 2014-03-26 13:44:58 +00:00
commit-bot@chromium.org
a713f9c6f6 add new readPixels with direct memory parameters 
BUG=skia:
R=scroggo@google.com, bsalomon@google.com, robertphillips@google.com, fmalita@google.com

Author: reed@google.com

Review URL: https://codereview.chromium.org/199413013

git-svn-id: http://skia.googlecode.com/svn/trunk@13840 2bbb7eff-a529-9590-31e7-b0007b416f81
 2014-03-17 21:31:26 +00:00
commit-bot@chromium.org
3da3b621c3 getDeviceCapabilities is no longer need, so remove it 
BUG=skia:
R=bungeman@google.com, vandebo@chromium.org

Author: reed@google.com

Review URL: https://codereview.chromium.org/198943003

git-svn-id: http://skia.googlecode.com/svn/trunk@13797 2bbb7eff-a529-9590-31e7-b0007b416f81
 2014-03-13 19:38:10 +00:00
commit-bot@chromium.org
15a1405999 Change device factories to take SkImageInfo instead of SkBitmap::Config 
patch from issue 167033002

BUG=skia:
R=reed@google.com

Author: reed@chromium.org

Review URL: https://codereview.chromium.org/168653002

git-svn-id: http://skia.googlecode.com/svn/trunk@13463 2bbb7eff-a529-9590-31e7-b0007b416f81
 2014-02-16 00:59:25 +00:00
commit-bot@chromium.org
ae761f7545 Make SkImageFilter methods const. 
SkImageFilter had some non-const methods that could all be made const.
This is a first step towards making SkImageFilter immutable.

BUG=skia:2097
R=mtklein@google.com, reed@google.com, robertphillips@google.com

Author: dominikg@chromium.org

Review URL: https://codereview.chromium.org/148883011

git-svn-id: http://skia.googlecode.com/svn/trunk@13330 2bbb7eff-a529-9590-31e7-b0007b416f81
 2014-02-05 22:32:02 +00:00
vandebo@chromium.org
5f209e6405 Revert "[PDF] Fix font embedding restrictions." 
This reverts r12600 and r12601, likely causing crash on Mac.

Review URL: https://codereview.chromium.org/111893002

git-svn-id: http://skia.googlecode.com/svn/trunk@12604 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-12-10 17:22:41 +00:00
commit-bot@chromium.org
47fb2b9c67 [PDF] Fix font embedding restrictions. 
Stop using restricted font outlines and honor don't subset restriction.

R=reed@google.com, bungeman@google.com

Author: vandebo@chromium.org

Review URL: https://codereview.chromium.org/107863002

git-svn-id: http://skia.googlecode.com/svn/trunk@12600 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-12-10 16:32:06 +00:00
edisonn@google.com
73a7ea3ae0 Implement DPI for perspective bitmaps in PDF - we save the bitmap at the resolution requested. 
R=reed@google.com, vandebo@chromium.org

Review URL: https://codereview.chromium.org/54913004

git-svn-id: http://skia.googlecode.com/svn/trunk@12230 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-11-11 20:55:15 +00:00
scroggo@google.com
a8e33a92e2 Add ability to ninepatch blurred rounded rectangle 
Speed up drawing large blurry round rectangles by converting them to
nine patches.

SkDraw:
Add drawRRect.

SkBitmapDevice:
Call SkDraw::drawRRect instead of converting SkRRect to an SkPath.

SkMaskFilter/SkBlurMaskFilter:
Create a nine patch of a blurred round rect and draw it instead of
drawing the entire thing.

SkPDFDevice:
Override drawRRect to perform the old behavior in
SkBitmapDevice::drawRect.

Depends on https://codereview.chromium.org/52703003

Tests are in https://codereview.chromium.org/52793005

BUG=https://b.corp.google.com/issue?id=11174385
R=reed@google.com, robertphillips@google.com

Review URL: https://codereview.chromium.org/48623006

git-svn-id: http://skia.googlecode.com/svn/trunk@12198 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-11-08 18:02:53 +00:00
vandebo@chromium.org
3b416216d1 [PDF] Improve complex xfer mode support. 
Xfer mode applies only to the shape of the source drawing, not everything in the clip as in currently implemented.  It's just that the current gm examples draw a shape that fills the visible layer.

R=edisonn@google.com, reed@google.com

Review URL: https://codereview.appspot.com/4631078

git-svn-id: http://skia.googlecode.com/svn/trunk@12034 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-30 20:48:05 +00:00
commit-bot@chromium.org
8c294900f3 Add DPI stettings to SkDocument::CreatePDF(). Tests will be added in a future cl, once DPI will be used in SkPDFDevice 
R=reed@google.com, bungeman@google.com, vandebo@chromium.org

Author: edisonn@google.com

Review URL: https://codereview.chromium.org/32233003

git-svn-id: http://skia.googlecode.com/svn/trunk@11886 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-21 17:14:37 +00:00
commit-bot@chromium.org
5e00989a28 Add SkPDFDeviceFlatenner which extends SkPDFDevice to add support to flatten the path and the text when we have perspective. 
prepare to deprecate SkPDFDevice constructor, and route gm and render_pdfs to use SkDocument::Create pdf interface instead. - controlled by a flag
add comments where we are supposed to flatten other features (paint, shaders, ... )

R=reed@google.com, bungeman@google.com, scroggo@google.com, vandebo@chromium.org, bsalomon@google.com

Author: edisonn@google.com

Review URL: https://codereview.chromium.org/24811002

git-svn-id: http://skia.googlecode.com/svn/trunk@11751 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-14 13:42:12 +00:00
edisonn@google.com
a9ebd161a7 pdf: drawPath should pass the computed matrix, instead of default matrix stored in draw. 
moved cl https://codereview.chromium.org/24265006/ in git repository so I can run the trybots

R=vandebo@chromium.org

Review URL: https://codereview.chromium.org/25675011

git-svn-id: http://skia.googlecode.com/svn/trunk@11626 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-07 13:22:21 +00:00
commit-bot@chromium.org
608ea6508a Use SkPicture::ExtractBitmap callback in pdf too, there is no need for a specialized function pointer for pdf only only to pass a rectangle, when we can use subseted bitmaps. 
R=scroggo@google.com, reed@google.com, vandebo@chromium.org, bsalomon@google.com

Author: edisonn@google.com

Review URL: https://codereview.chromium.org/25054002

git-svn-id: http://skia.googlecode.com/svn/trunk@11591 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-03 19:29:21 +00:00
commit-bot@chromium.org
e029440758 Replace SkTScopedPtr with SkAutoTDelete in Skia. 
BUG=
R=djsollen@google.com, reed@google.com, vandebo@chromium.org

Author: mtklein@google.com

Review URL: https://chromiumcodereview.appspot.com/23621005

git-svn-id: http://skia.googlecode.com/svn/trunk@11016 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-08-29 22:14:04 +00:00
robertphillips@google.com
1f2f338e23 Split SkDevice into SkBaseDevice and SkBitmapDevice 
https://codereview.chromium.org/22978012/



git-svn-id: http://skia.googlecode.com/svn/trunk@10995 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-08-29 11:54:56 +00:00
robertphillips@google.com
9b051a375b Revert r10830 (Split SkDevice out of SkRasterDevice) until we can get Chromium ready. 
git-svn-id: http://skia.googlecode.com/svn/trunk@10835 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-08-20 20:06:40 +00:00
robertphillips@google.com
3055b70018 Split SkDevice out of SkBitmapDevice 
https://codereview.chromium.org/22978012/



git-svn-id: http://skia.googlecode.com/svn/trunk@10830 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-08-20 17:49:04 +00:00
commit-bot@chromium.org
eed779d866 This CL plumbs in the drawBitmapRectToRect "bleed" flag and makes it live on the simplest GPU path. 
R=bsalomon@google.com, reed@google.com, edisonn@google.com, scroggo@google.com, jvanverth@google.com, mtklein@google.com

Author: robertphillips@google.com

Review URL: https://chromiumcodereview.appspot.com/20806003

git-svn-id: http://skia.googlecode.com/svn/trunk@10765 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-08-16 10:24:37 +00:00
commit-bot@chromium.org
d2623a1a0b Use Path Ops to generate PDF clips 
R=vandebo@chromium.org, edisonn@google.com, caryclark@google.com

Author: richardlin@chromium.org

Review URL: https://chromiumcodereview.appspot.com/21161003

git-svn-id: http://skia.googlecode.com/svn/trunk@10633 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-08-08 02:52:05 +00:00
commit-bot@chromium.org
92ffe7d10e Inverse fill support in PDF 
BUG= https://code.google.com/p/skia/issues/detail?id=241 (partial fix)
R=edisonn@google.com, vandebo@chromium.org, reed@google.com

Author: richardlin@chromium.org

Review URL: https://chromiumcodereview.appspot.com/19519017

git-svn-id: http://skia.googlecode.com/svn/trunk@10476 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-07-31 22:54:31 +00:00
robertphillips@google.com
9bf380ce7f drawBitmap* cleanup 
https://codereview.chromium.org/19977003/



git-svn-id: http://skia.googlecode.com/svn/trunk@10342 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-07-25 12:10:42 +00:00
commit-bot@chromium.org
4740135407 Fix Clang build on SkPDFResourceDict (CL 18977002) 
R=edisonn@google.com, vandebo@chromium.org

Author: richardlin@chromium.org

Review URL: https://chromiumcodereview.appspot.com/19954011

git-svn-id: http://skia.googlecode.com/svn/trunk@10295 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-07-23 21:49:29 +00:00
vandebo@chromium.org
fc16667077 Revert "Adds SkPDFResourceDict class, refactor existing code to use it." 
This reverts commit r10245

Review URL: https://codereview.chromium.org/19523007

git-svn-id: http://skia.googlecode.com/svn/trunk@10247 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-07-22 18:31:24 +00:00
commit-bot@chromium.org
3a8dfc36ae Adds SkPDFResourceDict class, refactor existing code to use it. 
Committed: http://code.google.com/p/skia/source/detail?r=10202

R=vandebo@chromium.org, edisonn@google.com

Author: richardlin@chromium.org

Review URL: https://chromiumcodereview.appspot.com/18977002

git-svn-id: http://skia.googlecode.com/svn/trunk@10245 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-07-22 18:20:52 +00:00
vandebo@chromium.org
d322cf4939 Revert "Adds SkPDFResourceDict class to manage resource dicts. Refactors existing code to use this class." 
This reverts commit r10202

Review URL: https://codereview.chromium.org/19790007

git-svn-id: http://skia.googlecode.com/svn/trunk@10205 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-07-19 20:13:44 +00:00
commit-bot@chromium.org
c84fb471d1 Adds SkPDFResourceDict class to manage resource dicts. Refactors existing code to use this class. 
BUG=
R=vandebo@chromium.org, edisonn@google.com

Author: richardlin@chromium.org

Review URL: https://chromiumcodereview.appspot.com/18977002

git-svn-id: http://skia.googlecode.com/svn/trunk@10202 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-07-19 18:58:34 +00:00
edisonn@google.com
a20e42c08b Remove SK_API, from SkTSet. the template is not public. 
Review URL: https://codereview.chromium.org/15792016

git-svn-id: http://skia.googlecode.com/svn/trunk@9374 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-05-31 18:04:20 +00:00
edisonn@google.com
d9dfa18372 Encode images with DCTDecode (JPEG) in PDFs if it makes sense. Fallback to FlateDecode (zip) if it makes sense. Otherewise include uncompressed stream. 
This change will reduce the size of PDFs to 50% (in the case of the existing SKPs, we reduce the total size of PDFs from 105MB to 50MB) 
Review URL: https://codereview.appspot.com/7068055

git-svn-id: http://skia.googlecode.com/svn/trunk@8835 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-04-24 13:01:01 +00:00
tfarina@chromium.org
7731eada5b Fix more clang errors. 
Fixed -Wunused-private-field errors.

R=reed@google.com,bsalomon@google.com

Review URL: https://codereview.chromium.org/13474012

git-svn-id: http://skia.googlecode.com/svn/trunk@8547 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-04-05 21:13:14 +00:00
edisonn@google.com
6addb19300 resubmit https://code.google.com/p/skia/source/detail?r=7883 (in the meantime we 
added capability to collect minidump and callstack if buildbot fails with heap
coruption in windows, and a NPE bug was fixed in SkPDFDocument, when document was destroyed without ever beeing used and a field was NULL + a few minor conflicts have been resolved)

git-svn-id: http://skia.googlecode.com/svn/trunk@8487 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-04-02 15:33:08 +00:00
robertphillips@google.com
acef3c4082 Reverting r8233 (Use SkSet in PDF) 
git-svn-id: http://skia.googlecode.com/svn/trunk@8255 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-03-20 14:42:51 +00:00
edisonn@google.com
66bedbb02d resubmit https://code.google.com/p/skia/source/detail?r=7883 (in the meantime we added capability to collect minidump and callstack if buildbot fails with heap coruption in windows. a few minor conflicts have been resolved) 
Review URL: https://codereview.chromium.org/12840004

git-svn-id: http://skia.googlecode.com/svn/trunk@8233 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-03-19 17:19:05 +00:00
edisonn@google.com
8c020612ba Update flag to reflect actual meaning. 
Review URL: https://codereview.chromium.org/12754004

git-svn-id: http://skia.googlecode.com/svn/trunk@8118 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-03-12 19:53:16 +00:00
epoger@google.com
b58772f866 PDF: add support for named destinations. 
Landing patchset 7 from https://codereview.appspot.com/7374052 for dml@google.com
Review URL: https://codereview.chromium.org/12533009

git-svn-id: http://skia.googlecode.com/svn/trunk@8034 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-03-08 09:09:10 +00:00
epoger@google.com
812b6f59fa Revert r8000 due to failures on some buildbots 
git-svn-id: http://skia.googlecode.com/svn/trunk@8001 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-03-06 00:47:22 +00:00
epoger@google.com
1cad898916 PDF: add support for named destinations 
Imported from https://codereview.appspot.com/7374052/ on behalf of dml@google.com
Review URL: https://codereview.chromium.org/12466008

git-svn-id: http://skia.googlecode.com/svn/trunk@8000 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-03-06 00:05:13 +00:00
edisonn@google.com
5bd26d32ab revert r7892 
git-svn-id: http://skia.googlecode.com/svn/trunk@7896 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-02-28 14:01:44 +00:00
edisonn@google.com
194b7cdb50 resubmit after fixing assert issue: https://codereview.appspot.com/6744050 
git-svn-id: http://skia.googlecode.com/svn/trunk@7892 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-02-27 19:45:11 +00:00
edisonn@google.com
d1c53aae59 Revert r7883 
git-svn-id: http://skia.googlecode.com/svn/trunk@7884 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-02-27 17:46:09 +00:00
edisonn@google.com
676aef05ab Use SkSet to fix issue when pdf generates an exp number of resources. 
The problem fixed - http://code.google.com/p/skia/issues/detail?id=940 - is that getResources will recursively obtain all child resource recursively without checking for duplicates.

If we have lots of duplicates, then we try to build a very large vector (exponential with the number of nodes usually) and sooner or later we end up using too much memory and crash.

A possible solution could have been to make sure resources do not have duplicates, but that requirement is impractical, and it this leaves the solution fragile, if there is any issue in the tree,  we crash.

When we emit the pdf, the large number of duplicates is not an issue, because SkPDFCatalog::addObject will deal with duplicates.

I have run the gm with --config pdf, and the images are 100% same bits, while the pdfs have the same size but some very small changes, the order of some objects.
Review URL: https://codereview.appspot.com/6744050

git-svn-id: http://skia.googlecode.com/svn/trunk@7883 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-02-27 16:54:44 +00:00