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10ba006631
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1481 Commits

Author SHA1 Message Date
bungeman@google.com
10ba006631 Allow users to build on top of, instead of beneath, SkRefCnt. 
Alternative to r11811.

The Chromium half of this can be seen at https://codereview.chromium.org/40973002/ .

R=reed@google.com

Review URL: https://codereview.chromium.org/40503002

git-svn-id: http://skia.googlecode.com/svn/trunk@11967 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-25 18:40:24 +00:00
bungeman@google.com
3c996f8a15 Implement charToGlyph on remaining ports. 
R=reed@google.com

Review URL: https://codereview.chromium.org/22859070

git-svn-id: http://skia.googlecode.com/svn/trunk@11955 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-24 21:39:35 +00:00
commit-bot@chromium.org
50a3043194 We want to give SkPixelRef a way to signal over to GrResourceCache that it's become pointless to keep around textures based on that SkPixelRef when its pixels change, so that it can be a good citizen and free those textures. 
This adds an invalidation listener mechanism to SkPixelRef to let it send this message while still staying ignorant of who's listening.

These messages are tricky to deliver.  The SkPixelRefs they originates from and the GrResourceCaches they ultimately end up at may be on different threads; neither class is threadsafe; their object lifetimes are totally independent; it's a many-senders-to-many-receivers relation; and neither codebase should really know about the other.

So I've added a per-message-type global message bus to broadcast messages to threadsafe inboxes.  Anyone can post() a message, which will show up in all the inboxes of that type, read whenever the inbox's owner calls poll().  The implementation is _dumb_; it can be improved in several dimensions (inbox size limits, lock-free message delivery) if we find the need.

I took some care to make sure not to send the invalidation message for any SkPixelRef that's sharing a generation ID with another SkPixelRef.

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

Author: mtklein@google.com

Review URL: https://codereview.chromium.org/26734003

git-svn-id: http://skia.googlecode.com/svn/trunk@11949 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-24 17:44:27 +00:00
tomhudson@google.com
381010e550 Expose SkPicture::willPlayBackBitmaps() 
This returns true if (1) the picture has finished recording and
(2) this picture or any picture drawn into it refers to any bitmaps. 
It allows clients doing complicated manipulations of the picture to 
early-out when there are no bitmaps present. 

BUG=303281
R=reed@google.com



git-svn-id: http://skia.googlecode.com/svn/trunk@11935 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-24 11:12:47 +00:00
senorblanco@chromium.org
1a6382f5e7 Split up SkXfermode::asNewEffectOrCoeff() into asNewEffect(), asCoeff(). 
R=bsalomon@google.com

Review URL: https://codereview.chromium.org/37593002

git-svn-id: http://skia.googlecode.com/svn/trunk@11926 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-23 18:41:36 +00:00
commit-bot@chromium.org
c0b7e10c6a Initial error handling code 
I made it as simple as possible. The impact seems minimal and it should do what's necessary to make this code secure.

BUG=

Committed: http://code.google.com/p/skia/source/detail?r=11247

R=reed@google.com, scroggo@google.com, djsollen@google.com, sugoi@google.com, bsalomon@google.com, mtklein@google.com, senorblanco@google.com, senorblanco@chromium.org

Author: sugoi@chromium.org

Review URL: https://codereview.chromium.org/23021015

git-svn-id: http://skia.googlecode.com/svn/trunk@11922 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-23 17:06:21 +00:00
commit-bot@chromium.org
1f81fd6546 SK_ONCE for SkData and SkPathRef 
Adds SK_ONCE_FRIEND, to allow SK_DEF_ONCE code to be friends with a class.  This had to go in include/core to be visible to headers there.

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

Author: mtklein@google.com

Review URL: https://codereview.chromium.org/26491003

git-svn-id: http://skia.googlecode.com/svn/trunk@11914 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-23 14:44:08 +00:00
senorblanco@chromium.org
fbcd415aa0 Remove GrContext from SkXfermode::[Aa]sNewEffectOrCoeff() and all subclasses, 
since it's unused.

R=bsalomon@google.com

Review URL: https://codereview.chromium.org/31853003

git-svn-id: http://skia.googlecode.com/svn/trunk@11913 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-23 14:03:22 +00:00
bsalomon@google.com
7ce564cccb Revert "If the path is a rect, call drawRect to raster the geometry in SkCanvas::drawPath to get better performance." 
This reverts commit r11904

Review URL: https://codereview.chromium.org/35543002

git-svn-id: http://skia.googlecode.com/svn/trunk@11909 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-22 16:54:15 +00:00
bsalomon@google.com
ad254fee73 If the path is a rect, call drawRect to raster the geometry in SkCanvas::drawPath to get better performance. 
Committed: http://code.google.com/p/skia/source/detail?r=11842

R=bsalomon@google.com

Review URL: https://codereview.chromium.org/23484007

git-svn-id: http://skia.googlecode.com/svn/trunk@11904 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-22 13:19:12 +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
reed@google.com
383a697692 store SkAlphaType inside SkBitmap, on road to support unpremul 
BUG=
R=bsalomon@google.com, scroggo@google.com

Review URL: https://codereview.chromium.org/25275004

git-svn-id: http://skia.googlecode.com/svn/trunk@11877 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-21 14:00:07 +00:00
robertphillips@google.com
c2eae47954 Reverting revert of r11862 (Constify SkFlattenable::getFactory()) or reverting r11871. 
git-svn-id: http://skia.googlecode.com/svn/trunk@11876 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-21 12:26:10 +00:00
robertphillips@google.com
b5e391025e Reverted due to Chromium compilation failures. Please see: 
https://codereview.chromium.org/30973002/



git-svn-id: http://skia.googlecode.com/svn/trunk@11871 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-20 13:34:21 +00:00
senorblanco@chromium.org
7938bae14a Implement crop rect support for SkMatrixConvolutionImageFilter. 
R=bsalomon@google.com

Review URL: https://codereview.chromium.org/27471002

git-svn-id: http://skia.googlecode.com/svn/trunk@11863 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-18 20:08:14 +00:00
commit-bot@chromium.org
575604d4c2 Constify SkFlattenable::getFactory(). 
This allows us to also constify the argument of
SkFlattenableWriteBuffer::writeFlattenable() - which I've recently found
myself const-casting for no apparent good reason.

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

Author: fmalita@chromium.org

Review URL: https://codereview.chromium.org/29143005

git-svn-id: http://skia.googlecode.com/svn/trunk@11862 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-18 19:37:55 +00:00
senorblanco@chromium.org
1aa68723b8 Make SkImageFilter::asNewEffect() (and all derived-class overrides) protected. 
R=bsalomon@google.com, bsalomon

Review URL: https://codereview.chromium.org/26937006

git-svn-id: http://skia.googlecode.com/svn/trunk@11847 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-17 19:35:09 +00:00
robertphillips@google.com
c2cc1dbe81 Revert r11842 (call drawRect to try GrAARectRenderer if the path is a rect - https://codereview.chromium.org/23484007) due to changes to the following GM images: 
inverse_paths
pathopsinverse




git-svn-id: http://skia.googlecode.com/svn/trunk@11845 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-17 17:34:20 +00:00
commit-bot@chromium.org
521a46750d If the path is a rect, call drawRect to raster the geometry in SkCanvas::drawPath to get better performance. 
R=bsalomon@google.com, robertphillips@google.com, reed@google.com

Author: yunchao.he@intel.com

Review URL: https://codereview.chromium.org/23484007

git-svn-id: http://skia.googlecode.com/svn/trunk@11842 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-17 16:29:21 +00:00
senorblanco@chromium.org
3f1f2a3a59 Make CropRect immutable after construction. 
BUG=
R=reed@google.com

Review URL: https://codereview.chromium.org/27490005

git-svn-id: http://skia.googlecode.com/svn/trunk@11819 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-16 18:07:48 +00:00
robertphillips@google.com
e9cd27d4a3 Third wave of Win64 warning cleanup 
https://codereview.chromium.org/27487003/



git-svn-id: http://skia.googlecode.com/svn/trunk@11817 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-16 17:48:11 +00:00
commit-bot@chromium.org
8f930ff33e Remove unused header SkImageTypes.h 
R=reed@google.com

Author: tfarina@chromium.org

Review URL: https://codereview.chromium.org/27281003

git-svn-id: http://skia.googlecode.com/svn/trunk@11815 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-16 17:02:28 +00:00
senorblanco@chromium.org
8b66abb9bc Remove support for SK_CROP_RECT_IS_INT, now that it is no longer used in Blink or Chrome. 
BUG=
R=reed@google.com, reed

Review URL: https://codereview.chromium.org/27521002

git-svn-id: http://skia.googlecode.com/svn/trunk@11812 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-16 15:46:00 +00:00
commit-bot@chromium.org
6d2533ebd2 Add hooks for external run-time reference adoption checks to SkRefCnt. 
The reference adoption checks are to help detect memory
leaks and bad usage when using SkRefCnt subclasses with
Blink's RefPtr.

BUG=crbug.com/304265
R=reed@google.com, bungeman@google.com

Author: junov@chromium.org

Review URL: https://codereview.chromium.org/25432003

git-svn-id: http://skia.googlecode.com/svn/trunk@11811 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-16 15:15:58 +00:00
reed@google.com
353482251e force readbuffer clients to use specialized readFoo for flattenables 
BUG=
R=mtklein@google.com

Review URL: https://codereview.chromium.org/26702002

git-svn-id: http://skia.googlecode.com/svn/trunk@11803 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-16 13:05:06 +00:00
commit-bot@chromium.org
2f92966c6a Remove SkDataTable from SkFlattenable hierarchy. 
As far as I can tell, we never really needed this.  No code outside the unit
test calls this code.

BUG=
R=reed@google.com

Author: mtklein@google.com

Review URL: https://codereview.chromium.org/26223009

git-svn-id: http://skia.googlecode.com/svn/trunk@11792 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-15 20:39:57 +00:00
commit-bot@chromium.org
e0e1da34f3 Remove SkColorTable from SkFlattenable hierarchy. 
BUG=
R=reed@google.com

Author: mtklein@google.com

Review URL: https://codereview.chromium.org/27392002

git-svn-id: http://skia.googlecode.com/svn/trunk@11791 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-15 20:36:16 +00:00
skia.committer@gmail.com
fbc58a3055 Sanitizing source files in Housekeeper-Nightly 
git-svn-id: http://skia.googlecode.com/svn/trunk@11769 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-15 07:02:27 +00:00
robertphillips@google.com
adacc7067a Start cleaning up 64bit Win warnings 
https://codereview.chromium.org/27192003/



git-svn-id: http://skia.googlecode.com/svn/trunk@11764 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-14 21:53:24 +00:00
reed@google.com
0cd2ac6c72 change SkAnnotation to not inherit from SkFlattenable (does not need dynamic factories) 
BUG=
R=scroggo@google.com

Review URL: https://codereview.chromium.org/26606004

git-svn-id: http://skia.googlecode.com/svn/trunk@11762 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-14 20:02:44 +00:00
reed@google.com
4979f32cd3 remove SkDataSet, and just store a key/value in SkAnnotation 
BUG=
R=mtklein@google.com

Review URL: https://codereview.chromium.org/27208002

git-svn-id: http://skia.googlecode.com/svn/trunk@11759 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-14 16:49:15 +00:00
commit-bot@chromium.org
2887119a63 save/restore the canvas around every bench draw call 
BUG=

Committed: http://code.google.com/p/skia/source/detail?r=11728

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

Author: mtklein@google.com

Review URL: https://codereview.chromium.org/26848013

git-svn-id: http://skia.googlecode.com/svn/trunk@11755 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-14 15:28:01 +00:00
reed@google.com
da30055b29 SkData need not be a Flattenable, since it does not need subclass/factories 
BUG=
R=mtklein@google.com

Review URL: https://codereview.chromium.org/26928002

git-svn-id: http://skia.googlecode.com/svn/trunk@11754 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-14 14:33:11 +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
bungeman@google.com
fab44db294 Clean up SkTypes.h. 
This change removes sk_stdint.h since it is only needed for vs2008 and earlier.
This change removes SK_MMAP_SUPPORT define since it is no longer used.
This change removes the stdio.h include from SkTypes.h since on many systems
this is a very large header, few Skia files actually use it, it is
available everywhere standard, and SkDebugf should be used instead.

After this change there is no need for external users to put Skia's
include/config into their own list of includes, saving the headache
of having two header files of the same name and sometimes getting the
wrong one depending on include order.

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

Review URL: https://codereview.chromium.org/27044002

git-svn-id: http://skia.googlecode.com/svn/trunk@11738 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-11 18:50:45 +00:00
reed@google.com
fb6deed66c make explicit the requirement that all colorfilters are reentrant-safe 
BUG=
R=mtklein@google.com

Review URL: https://codereview.chromium.org/26876002

git-svn-id: http://skia.googlecode.com/svn/trunk@11705 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-10 17:35:58 +00:00
reed@google.com
0a6151d66c Revert "Revert "change SkColorTable to be immutable"" 
This reverts commit b8162cb840f4cb6002ef68d5ac775c6a122c52a9.

Fixed was call-sites in benches that used the (now gone) setIsOpaque api.

R=scroggo@google.com

Review URL: https://codereview.chromium.org/26572006

git-svn-id: http://skia.googlecode.com/svn/trunk@11695 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-10 14:44:56 +00:00
senorblanco@chromium.org
b295fb6ff3 Change SkImageFilter's cropRect from SkIRect to a CropRect struct, containing an SkRect and flags indicating which parameters are set. 
NOTE: this will require SK_CROP_RECT_IS_INT=1 to be set in Chrome until Blink has been updated to use SkImageFilter::CropRect. Include https://codereview.chromium.org/26528002/ with the Skia roll.

Note also that SK_CROP_RECT_IS_INT is a temporary measure until all call sites in Blink have been updated to use SkRect.

R=reed@google.com

Review URL: https://codereview.chromium.org/26371002

git-svn-id: http://skia.googlecode.com/svn/trunk@11692 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-10 13:51:19 +00:00
commit-bot@chromium.org
b5a6651f9f SkDocument api changes (abort, close return success, set DCT encoder...). 
R=reed@google.com, reed

Author: edisonn@google.com

Review URL: https://codereview.chromium.org/26744002

git-svn-id: http://skia.googlecode.com/svn/trunk@11688 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-09 21:09:00 +00:00
reed@google.com
48d9ff5b34 Revert "change SkColorTable to be immutable" 
This reverts commit 1c0ff422868b3badf5ffe0790a5d051d1896e2f7.

BUG=

Review URL: https://codereview.chromium.org/26709002

git-svn-id: http://skia.googlecode.com/svn/trunk@11677 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-09 16:49:45 +00:00
reed@google.com
9864c24e40 change SkColorTable to be immutable 
BUG=
R=scroggo@google.com

Review URL: https://codereview.chromium.org/25353002

git-svn-id: http://skia.googlecode.com/svn/trunk@11676 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-09 16:34:47 +00:00
commit-bot@chromium.org
df187c7eb2 ARM Skia NEON patches - 28 - Xfermode: SIMD modeprocs 
Xfermode: allow for SIMD modeprocs

    This patch introduces the ability to have SIMD Xfermode modeprocs.
    In the NEON implementation, SIMD modeprocs will process 8 pixels
    at a time.

    Signed-off-by: Kévin PETIT <kevin.petit@arm.com>

BUG=

Committed: http://code.google.com/p/skia/source/detail?r=11654

R=djsollen@google.com, mtklein@google.com, reed@google.com

Author: kevin.petit.arm@gmail.com

Review URL: https://codereview.chromium.org/23644006

git-svn-id: http://skia.googlecode.com/svn/trunk@11669 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-09 14:39:46 +00:00
djsollen@google.com
6f980c6a23 Revert "ARM Skia NEON patches - 28 - Xfermode: SIMD modeprocs" 
This reverts http://code.google.com/p/skia/source/detail?r=11654

Review URL: https://codereview.chromium.org/26340010

git-svn-id: http://skia.googlecode.com/svn/trunk@11655 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-08 16:59:53 +00:00
commit-bot@chromium.org
84cc1ebc5a ARM Skia NEON patches - 28 - Xfermode: SIMD modeprocs 
Xfermode: allow for SIMD modeprocs

    This patch introduces the ability to have SIMD Xfermode modeprocs.
    In the NEON implementation, SIMD modeprocs will process 8 pixels
    at a time.

    Signed-off-by: Kévin PETIT <kevin.petit@arm.com>

BUG=
R=djsollen@google.com, mtklein@google.com, reed@google.com

Author: kevin.petit.arm@gmail.com

Review URL: https://codereview.chromium.org/23644006

git-svn-id: http://skia.googlecode.com/svn/trunk@11654 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-08 16:47:22 +00:00
commit-bot@chromium.org
86490573b5 commit to xfermode objects being immutable 
BUG=
R=djsollen@google.com, mtklein@google.com

Author: reed@google.com

Review URL: https://codereview.chromium.org/25968004

git-svn-id: http://skia.googlecode.com/svn/trunk@11614 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-04 16:52:55 +00:00
commit-bot@chromium.org
3390b9ac9a Repurpose GrGLCoordTransform as GrGLProgramEffects 
Creates a GrGLProgramEffects class that the GrGLProgram uses to manage
an array of effects. This gives us enough abstraction for the program
to cleanly handle different types of coord transforms.

R=bsalomon@google.com

Author: cdalton@nvidia.com

Review URL: https://codereview.chromium.org/25605008

git-svn-id: http://skia.googlecode.com/svn/trunk@11588 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-03 15:17:58 +00:00
robertphillips@google.com
aaf3e64b2c Move makeSpace and resetToSize from SkPathRef.cpp to .h 
https://codereview.chromium.org/25754002/



git-svn-id: http://skia.googlecode.com/svn/trunk@11578 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-02 17:49:50 +00:00
commit-bot@chromium.org
80390ec0f5 Threads can race to be the first one to calculate the empty path ref's bounds. 
To dodge the problem, call computeBounds when creating the global empty path
ref.

There's still another race here, which is that we can race to create the empty
path ref in the first place.  As written we can conceivably allocate an
arbitrary number of empty path refs, one of which ends up pointed to by the
global variable at the end.

I've punted on fixing this for now because 1) tsan has not complained yet; 2) I
think it can be fixed by the same approach as we can fix the memsets in
25415003, so I want to wait to see how that review goes
first.

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

Author: mtklein@google.com

Review URL: https://codereview.chromium.org/25745003

git-svn-id: http://skia.googlecode.com/svn/trunk@11576 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-02 16:42:58 +00:00
robertphillips@google.com
0308707248 Make it explicit that some validate methods are debug only 
https://codereview.chromium.org/25716003/



git-svn-id: http://skia.googlecode.com/svn/trunk@11575 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-02 16:42:21 +00:00
scroggo@google.com
8d2392487c Add an option on SkImageDecoder to skip writing 0s. 
Only implemented for PNG.

Add a getter and setter, and sets the default to false in the
constructor. Also copies the setting in copyFieldsToOther.

Fix an indpendent bug where fDitherImage was not being copied in
copyFieldsToOther.

In SkScaledBitmapSampler::begin, consolidate the settings passed in
by passing a const reference to the decoder. The decoder can be
referenced for its settings of dither, unpremultiplied, and now
skipping writing zeroes. Update callers to use the new API. In png
decoder, rather than passing around a pointer to an initial
read of getDitherImage, and potentially changing it, look at the
field on the decoder itself, and modify it directly. This is a
change in behavior - now if that same decoder is used to decode
a different image, the dither setting has changed. I think this is
okay because A) the typical use case is to use a new decoder for
each decode, B) we do not make any promises that a decode does not
change the decoder and C) it makes the code in SkScaledBitmapSampler
much cleaner.

In SkScaledBitmapScampler, add new row procs for skipping zeroes. Now
that choosing the row proc has five dimensions (src config, dst config,
dither, skip writing zeroes, unpremultiplied), use a new method: each
src/dst combination has a function for choosing the right proc depending
on the decoder.

SkScaledBitmapScampler::RowProc is now public for convenience.

Remove Sample_Gray_D8888_Unpremul, which is effectively no different
from Sample_Gray_D8888.

In cases where unpremultiplied was trivial, such as 565 and when
sampling from gray, decoding may now succeed.

Add a benchmark (currently disabled) for comparing the speed of skipping
writing zeroes versus not skipping. For this particular image, which is
mostly transparent pixels, normal decoding took about 3.6 milliseconds,
while skipping zeroes in the decode took only about 2.5 milliseconds
(this is on a Nexus 4). Presumably it would be slower on an image
with a small amount of transparency, but there will be no slowdown
for an image which reports that it has no transparency.

In SkImageRef_ashmem, always skip writing zeroes, since ashmem
memory is guaranteed to be initialized to 0.

Add a flag to skip writing zeroes in skimage.

Add a regression test for choosing the rowproc to ensure I did not
change any behavior accidentally.

BUG=skia:1661
R=reed@google.com

Review URL: https://codereview.chromium.org/24269006

git-svn-id: http://skia.googlecode.com/svn/trunk@11558 2bbb7eff-a529-9590-31e7-b0007b416f81
 2013-10-01 17:27:15 +00:00