This reverts commit 87e7f820f7.
Reason for revert: Failed a test on Mac
Original change's description:
> Add SkTypeface::getVariationDesignPosition.
>
> Allow users to query a typeface's position in variation design space.
>
> Change-Id: I5d80c8ff658708a5d1aa386ec5b7396dcb621198
> Reviewed-on: https://skia-review.googlesource.com/7130
> Commit-Queue: Ben Wagner <bungeman@google.com>
> Reviewed-by: Mike Reed <reed@google.com>
>
TBR=bungeman@google.com,reed@google.com,reviews@skia.org,drott@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
Change-Id: Ia65792083642dbe9333a62eb75d162931b57cffd
Reviewed-on: https://skia-review.googlesource.com/8670
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
Allow users to query a typeface's position in variation design space.
Change-Id: I5d80c8ff658708a5d1aa386ec5b7396dcb621198
Reviewed-on: https://skia-review.googlesource.com/7130
Commit-Queue: Ben Wagner <bungeman@google.com>
Reviewed-by: Mike Reed <reed@google.com>
Corresponds with Android change
https://android-review.googlesource.com/#/c/326439/
"this version includes encoder and performance improvements"
Update build file
* Many files have been renamed from
src/<subdir>/<name>.c
to
src/<subdir>/<name>_<subdir>.c
* Build new files (*_msa.c, *_neon.c, predictor_enc.c)
This should fix issue 5876, which was caused by a compiler bug.
With the added NEON implementation, we will no longer trigger
the bug.
BUG=skia:5876
CQ_INCLUDE_TRYBOTS=skia.primary:Build-Mac-Clang-arm-Debug-iOS
Review-Url: https://codereview.chromium.org/2689283007
Code and docs are at: https://github.com/ocornut/imgui
ImGui is an open source immediate mode GUI library that's
lightweight and fairly simply to integrate. Widget functions
return their state, and the library emits vertex and index
data to render everything. It's got a huge set of built-in
widgets and really robust layout control.
For the initial integration, I had to fix up event handling
in the viewer's app framework (to get mouse wheel and more
keys, etc...).
The new viewer 'Debug' window is toggled with the space bar.
For this change, I've added one feature to that window: the
slide picker. It's got a list of all slides, with filtering
support, and the ability to click to switch slides.
I also included the ImGui 'Demo' window (toggled with 'g').
This is nicely laid out, and includes examples of pretty
much everything the library can do. It also serves as good
documentation - find something that looks like what you want,
and then go look at the corresponding code (all of it is in
imgui_demo.cpp).
I have other CLs with other features (like directly editing
the primaries of the working color space), but I wanted to
land this chunk first, then start adding more features.
Other than adding new debugging features, there are few
more outstanding work items:
1) Raster doesn't render the GUI correctly, due to non-
invertible pos -> UV matrices. Florin is working on that.
2) Touch inputs aren't being routed yet, so the GUI isn't
usable on Android yet. Might also be tough to work with,
given the size.
3) ImGui has clipboard integration (that's why it wants
the C, X, and V keys), but we need to wire it up to the
OS' clipboard functions.
4) Draw commands can carry a void* payload to support
drawing images (using whatever mechanism the engine has).
I'd like to set that up (probably using SkImage*), which
makes it really easy to add visualization of off-screen
images in GMs, etc...
BUG=skia:
Change-Id: Iac2a63e37228d33141cb55b7e4d60bf11b7e9ae1
Reviewed-on: https://skia-review.googlesource.com/7702
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
If this breaks anything in google3 revert it.
Change-Id: I35eb588e753a6fad78c1255556daae145533c801
Reviewed-on: https://skia-review.googlesource.com/8275
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Herb Derby <herb@google.com>
Change-Id: I0c2f050c70755523abfbe98c17e90a90ecbedff5
Reviewed-on: https://skia-review.googlesource.com/8113
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Hal Canary <halcanary@google.com>
Change-Id: I44c95341e7bc631322a9802bce3fdc5a0e8c4bb5
Reviewed-on: https://skia-review.googlesource.com/8066
Commit-Queue: Mike Klein <mtklein@chromium.org>
Commit-Queue: Hal Canary <halcanary@google.com>
Reviewed-by: Hal Canary <halcanary@google.com>
Previously, getFrameInfo might report a frame that was truncated prior
to setting its requiredFrame. As a result, fRequiredFrame may be
different depending on how much data has already been received.
If there is a local color table, do not report the frame until the
color table has been received, since that is used to determine
fRequiredFrame. If there is no local color table, set fRequiredFrame
and report the frame after reading the header.
Add a test.
Replace make_from_resource with GetResourceAsData
Change-Id: I1b697f766c1d0e1e12ab2ae1d27167af5193395d
Reviewed-on: https://skia-review.googlesource.com/7756
Reviewed-by: Matt Sarett <msarett@google.com>
Commit-Queue: Leon Scroggins <scroggo@google.com>
Generate targets for dm and nanobench from ninja and add them to the
generated Android.bp file.
Remove nanobenchAndroid and SkAndroidSDKCanvas. These rely on HWUI
internals and are currently unused.
Update gyp file references to removed files, just in case.
Change-Id: Ic6ae18a70bfd0c33804e7996d077f2081dfdfe07
Reviewed-on: https://skia-review.googlesource.com/7635
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Leon Scroggins <scroggo@google.com>
This reverts commit e2f6ffbf49.
Reason for revert:
iOS build failures, see https://luci-milo.appspot.com/swarming/task/33e5e02cf8419d10/steps/build_iOSShell/0/stdout
Original change's description:
> Update libwebp to 0.6.0-pre
>
> Corresponds with Android change
> https://android-review.googlesource.com/#/c/326439/
>
> "this prerelease snapshot includes encoder and performance
> improvements"
>
> Update build file
> * Many files have been renamed from
> src/<subdir>/<name>.c
> to
> src/<subdir>/<name>_<subdir>.c
>
> * Build new files (*_msa.c, *_neon.c, predictor_enc.c)
>
> This should fix issue 5876, which was caused by a compiler bug.
> With the added NEON implementation, we will no longer trigger
> the bug.
>
> BUG=skia:5876
>
> Change-Id: I0fcce4362ee70138547b1d23aa9ef537a4126e73
> Reviewed-on: https://skia-review.googlesource.com/7376
> Reviewed-by: Matt Sarett <msarett@google.com>
> Commit-Queue: Leon Scroggins <scroggo@google.com>
>
TBR=msarett@google.com,scroggo@google.com,reviews@skia.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:5876
Change-Id: Ib81f63861d9f1c6936bd7f790b5e16a9544a4df0
Reviewed-on: https://skia-review.googlesource.com/7420
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Corresponds with Android change
https://android-review.googlesource.com/#/c/326439/
"this prerelease snapshot includes encoder and performance
improvements"
Update build file
* Many files have been renamed from
src/<subdir>/<name>.c
to
src/<subdir>/<name>_<subdir>.c
* Build new files (*_msa.c, *_neon.c, predictor_enc.c)
This should fix issue 5876, which was caused by a compiler bug.
With the added NEON implementation, we will no longer trigger
the bug.
BUG=skia:5876
Change-Id: I0fcce4362ee70138547b1d23aa9ef537a4126e73
Reviewed-on: https://skia-review.googlesource.com/7376
Reviewed-by: Matt Sarett <msarett@google.com>
Commit-Queue: Leon Scroggins <scroggo@google.com>
* SkAutoFree moved to SkTemplates.h (now implmented with unique_ptr).
* SkAutoMalloc and SkAutoSMalloc moved to SkAutoMalloc.h
* "SkAutoFree X(sk_malloc_throw(N));" --> "SkAutoMalloc X(N);"
Revert "Revert 'SkTypes.h : move SkAutoMalloc into SkAutoMalloc.h'"
This reverts commit c456b73fef.
Change-Id: Ie2c1a17c20134b8ceab85a68b3ae3e61c24fbaab
Reviewed-on: https://skia-review.googlesource.com/6886
Reviewed-by: Hal Canary <halcanary@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
* SkAutoFree moved to SkTemplates.h (now implmented with unique_ptr).
* SkAutoMalloc and SkAutoSMalloc moved to SkAutoMalloc.h
* "SkAutoFree X(sk_malloc_throw(N));" --> "SkAutoMalloc X(N);"
Change-Id: Idacd86ca09e22bf092422228599ae0d9bedded88
Reviewed-on: https://skia-review.googlesource.com/4543
Reviewed-by: Ben Wagner <bungeman@google.com>
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
Also add ANGLE ES3 predefined configs.
BUG=skia:
CQ_INCLUDE_TRYBOTS=skia.primary:Test-Win10-MSVC-ShuttleC-GPU-GTX960-x86_64-Debug-ANGLE
Change-Id: Ib7394afa961da1afe91c6dfefe08528273d3087c
Reviewed-on: https://skia-review.googlesource.com/6698
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Mike Klein <mtklein@chromium.org>
SkSplicer is better.
CQ_INCLUDE_TRYBOTS=skia.primary:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-SKNX_NO_SIMD
Change-Id: I014ec0e9fb00a8a4694d442e672c65402621dc67
Reviewed-on: https://skia-review.googlesource.com/6830
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Mike Klein <mtklein@chromium.org>
ffd8f62236..08fd250e1a
This picks up a number of fixes and an implementation of
FT_Get_Var_Design_Coordinates.
Change-Id: Idac2b3b5d2b0684fa2c13f4f2484c09f39a4eced
Reviewed-on: https://skia-review.googlesource.com/6815
Reviewed-by: Derek Sollenberger <djsollen@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
A little JIT proof of concept for SkRasterPipeline, using xbyak, which is a header-only assembler. It's x86-only, but supports x86 very thoroughly, and it's very user friendly (at least as far as assembler libraries go...).
CQ_INCLUDE_TRYBOTS=skia.primary:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-SKNX_NO_SIMD
Change-Id: Ie17e562b0f3fff5914041badfb2c1fe4f86efab8
Reviewed-on: https://skia-review.googlesource.com/5730
Reviewed-by: Herb Derby <herb@google.com>
Reviewed-by: Heather Miller <hcm@google.com>
Commit-Queue: Mike Klein <mtklein@chromium.org>
If a frame does not have a valid transparent index and it covers the
prior frame, it does not really depend on that frame. Instead, it
depends on the frame that the prior frame depends on.
Determine this once we have parsed the local color map (if any), so a
transparent index out of range of the color map is not considered
valid.
Share code that determines whether a frame has a transparent pixel.
Add a test that we compute the dependencies correctly. randPixelsAnim.gif
has 13 frames. After the first, the frames cover all combinations of
- Whether the prior frame was keep, restoreBG or restoreToPrevious
- Whether the new frame covers the prior frame
- Whether the new frame has a transparent pixel
(It only does so when using a global color table. It may make sense to
expand the test to also cover using local color tables.)
The test caught a bug where we incorrectly reused an existing
SkColorTable for a different frame. Fix that bug by keeping track of
the transparent index associated with the current SkColorTable.
Change-Id: I3cf6be7f612990fa7a00d9e74d116d31bd227526
Reviewed-on: https://skia-review.googlesource.com/6402
Reviewed-by: Matt Sarett <msarett@google.com>
Commit-Queue: Leon Scroggins <scroggo@google.com>
std::vector needs to be able to assign objects contained inside it. With
const member variables, this isn't possible. Remove the consts so
SkGIFLZWBlock can be assigned.
BUG=skia:6072
Change-Id: I990dc80fb1c49fbd584712c6d0c1154c2da36e85
Reviewed-on: https://skia-review.googlesource.com/6362
Reviewed-by: Leon Scroggins <scroggo@google.com>
Commit-Queue: Leon Scroggins <scroggo@google.com>
If the input SkStream has a length and position, do not copy and store
LZW blocks or ColorMaps. Instead, mark the position and size, and read
from the stream when necessary.
This will save memory in Chromium's use case, which has already
buffered all of its data.
In the case where we *do* need to copy, store it on the SkStreamBuffer.
This allows SkGifImageReader to have simpler code.
Add tests.
Change-Id: Ic65fa766328ae2e5974b2084bc2099e19aced731
Reviewed-on: https://skia-review.googlesource.com/6157
Reviewed-by: Matt Sarett <msarett@google.com>
Commit-Queue: Leon Scroggins <scroggo@google.com>
This reverts commit ada12ab055.
Reason for revert: Google3 needs it:
https://test.corp.google.com/ui#id=OCL:142184832:BASE:142184975:1481839118985:32fde8ef
Original change's description:
> Remove all KTX support
>
> It is untested and unused.
>
> Change-Id: I010ff4ad942738f362d42a99af4edbbb1cb0cd71
> Reviewed-on: https://skia-review.googlesource.com/6142
> Commit-Queue: Leon Scroggins <scroggo@google.com>
> Reviewed-by: Mike Klein <mtklein@chromium.org>
> Reviewed-by: Robert Phillips <robertphillips@google.com>
>
TBR=mtklein@chromium.org,mtklein@google.com,robertphillips@google.com,scroggo@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
Change-Id: I1ea2f9487eb2212efbfcc514122792b70c9e8737
Reviewed-on: https://skia-review.googlesource.com/6181
Commit-Queue: Leon Scroggins <scroggo@google.com>
Reviewed-by: Leon Scroggins <scroggo@google.com>
It is untested and unused.
Change-Id: I010ff4ad942738f362d42a99af4edbbb1cb0cd71
Reviewed-on: https://skia-review.googlesource.com/6142
Commit-Queue: Leon Scroggins <scroggo@google.com>
Reviewed-by: Mike Klein <mtklein@chromium.org>
Reviewed-by: Robert Phillips <robertphillips@google.com>
If there is enough data in the stream to read the reported canvas size,
but not enough to read the first image's header, we do not know the
true canvas size, since we may expand it to fit the first frame. In
that case, return nullptr from NewFromStream.
Add a test.
SkGifCodec.cpp:
Correct a comment - parse returns false if there is a fatal error.
parse() returning true does not guarantee that the size was found.
Instead of checking the width and height, check to see whether the
first frame exists and has its header defined. If not, we do not yet
know the true canvas size. Assert that the canvas size is non-zero,
which is a fatal error from parse.
SkGifImageReader.cpp:
Move the code to set the header defined before the SkGIFSizeQuery exit
condition. This allows SkGifCodec to check the first frame's header to
determine whether the size is known.
GifTest.cpp:
Add a test which truncates the file just before the image header (and
after the global header). Prior to the other changes, this would create
an SkCodec. For an image that needs its canvas size expanded, the
SkCodec would have an incorrect size.
CodecPartialTest.cpp:
randPixels.gif now needs more than half of its data to create an
SkCodec, so set a minimum for test_partial.
Change-Id: I40482f524128b2f1fe59b8f27dd64c7cbe793079
Reviewed-on: https://skia-review.googlesource.com/5701
Reviewed-by: Derek Sollenberger <djsollen@google.com>
Commit-Queue: Leon Scroggins <scroggo@google.com>
SkGIFFrameContext::decode() and SkGIFLZWContext::prepareToDecode() do
not need (or use) the global color map, so stop passing it as a
parameter. The parameter was used prior to
https://skia-review.googlesource.com/c/4379/ (different issue!), but we
overlooked removing it then.
Change-Id: I0f477e9db11f7650938d6b868baef69e3b37d86b
Reviewed-on: https://skia-review.googlesource.com/5609
Commit-Queue: Leon Scroggins <scroggo@google.com>
Reviewed-by: Matt Sarett <msarett@google.com>
BUG=skia:
Change-Id: I876e802db370a7812cd53e42cb4927702e6c1fb6
Reviewed-on: https://skia-review.googlesource.com/5418
Commit-Queue: Hal Canary <halcanary@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Also, no more SkImageEncoder class.
SK_SUPPORT_LEGACY_IMAGE_ENCODER_CLASS now only guards some
old API shims.
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=5006
Change-Id: I3797f584f3e8e12ade10d31e8733163453725f40
Reviewed-on: https://skia-review.googlesource.com/5006
Commit-Queue: Hal Canary <halcanary@google.com>
Reviewed-by: Leon Scroggins <scroggo@google.com>
Reviewed-by: Mike Reed <reed@google.com>
This should fix Build-Mac-Clang-arm64-Debug-GN_iOS_NoBuildbot.
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4755
Change-Id: Ie49ce5642fb2d373102c9309074e13ee3035a569
Reviewed-on: https://skia-review.googlesource.com/4755
Reviewed-by: Matt Sarett <msarett@google.com>
Commit-Queue: Mike Klein <mtklein@chromium.org>
These are so easy we might as well...
I did a quick check of relevant-looking defines:
- GYP defined WITH_SIMD, but it looks like that's already defined (by jconfig.h?);
- GYP defined RGBX_FILLER_0XFF, but that affects only x86/x86-64;
- GYP defined STRICT_MEMORY_ACCESS, which does nothing;
- GYP defined MOTION_JPEG_SUPPORTED, which does nothing (and we'd probably not care anyway).
BUG=skia:5875
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4745
Change-Id: Ib1f28d354630be472c4d9648d5ade74a452a9e24
Reviewed-on: https://skia-review.googlesource.com/4745
Reviewed-by: Matt Sarett <msarett@google.com>
Commit-Queue: Mike Klein <mtklein@chromium.org>
When we opt into Lua, this builds SampleLua into SampleApp, and the lua_app and lua_pictures tools.
I've tested this builds with and without skia_use_system_lua on my Mac laptop and Linux desktop.
I've made lua_pictures.cpp's flags static to avoid conflicts with flags in SkCommonFlags.cpp.
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4699
DOCS_PREVIEW= https://skia.org/?cl=4699
Change-Id: I8176fd51d8a38746e7d730cfcce66da42b9a015a
Reviewed-on: https://skia-review.googlesource.com/4699
Reviewed-by: Hal Canary <halcanary@google.com>
Commit-Queue: Mike Klein <mtklein@chromium.org>
I was profiling and remembered GN hasn't turned on much CPU-specific code. I looked at zlib, then libpng, then libjpeg-turbo:
- zlib was easy but not useful. No routine we use in decoding changes significantly.
- libpng was easy and useful, and we were already using NEON filters on ARM.
- libjpeg-turbo requires yasm and is annoying.
BUG=skia:5875
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4531
Change-Id: Ie072a457da41ee6538eebacb5eb5dbe5a6eb585e
Reviewed-on: https://skia-review.googlesource.com/4531
Commit-Queue: Mike Klein <mtklein@chromium.org>
Reviewed-by: Matt Sarett <msarett@google.com>
This stems from a behavior difference between Skia and Chrome.
In Skia, we want to write transparent pixels as often as possible.
(It's faster than checking if we should skip each pixel.)
In Chrome, they avoid writing transparent pixels unless
absolutely necessary.
We were cautious about changing behavior when this first landed,
but this is easier to think about in a smaller change (right now).
(1) We can always write transparent pixels when we are writing
an independent frame.
(2) There is no need for the progressiveDisplay() check. We
only ever use progressive display methods on the first
frame - and the first frame is always independent.
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4379
Change-Id: I82048a08e2003aac216f483c7db8df997b687149
Reviewed-on: https://skia-review.googlesource.com/4379
Commit-Queue: Matt Sarett <msarett@google.com>
Reviewed-by: Leon Scroggins <scroggo@google.com>
This was always intended to be a temporary dependency to use for
testing. It has served its purpose.
Also, this has already been dropped (accidentally, I think) by
the new GN build.
TBR=reed@google.com
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4220
Change-Id: Ic72ee08bbfaf86ed86a4122fd38be2921eb1327e
Reviewed-on: https://skia-review.googlesource.com/4220
Reviewed-by: Matt Sarett <msarett@google.com>
Reviewed-by: Leon Scroggins <scroggo@google.com>
Commit-Queue: Matt Sarett <msarett@google.com>
This extends the pattern in freetype2 to expat, icu, libjpeg-turbo, libpng, libwebp, and zlib, and gives all these an arg to control which to use.
Homebrew doesn't have dng_sdk, piex, or sftnly, or I'd have done the same for them too.
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4260
DOCS_PREVIEW= https://skia.org/?cl=4260
Change-Id: I82e780502bf2217336e791787f172a6fc8f55460
Reviewed-on: https://skia-review.googlesource.com/4260
Commit-Queue: Mike Klein <mtklein@chromium.org>
Reviewed-by: Hal Canary <halcanary@google.com>
Add a new accessor to retrieve the repetition count.
Remove constants (and corresponding copyright) in SkCodecAnimation.
These may make sense for the calling code, but are not needed here.
kRepetitionCountInfinite corresponds to Blink's kAnimationLoopInfinite.
Move cLoopCountNotSeen to private. It is used to determine whether we
still need to parse. Add a new enum to the parse query - only parse
enough to determine the repetition count.
Unlike Chromium, SkGifCodec does not account for deleting the reader
(which SkGifCodec does not do) or failed decodes.
Add a test.
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2447863002
Review-Url: https://codereview.chromium.org/2447863002
Add BUILD.gn files for dng_sdk and piex and updated BUILD.gn to
build SkRawCodec.
We stopped testing raw images when we switched to GN, so this will
bring back our testing.
Leave SkRawCodec disabled on Windows, where we've had problems in the
past.
Originally landed in issue 4603. Reverted due to build errors.
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2463433002
Review-Url: https://codereview.chromium.org/2463433002
When checking to see whether a GIF has transparency to determine its
alpha type, treat an empty color table as having alpha, since we
will draw it as a transparent image.
(This is a separate bug from skbug.com/5883, but the image I used to
verify that bug was drawn to 565 as black. The fix is to not support
565 in that case, by changing its recommended alpha type.)
BUG=skia:5883
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2461813002
Review-Url: https://codereview.chromium.org/2461813002
Add BUILD.gn files for dng_sdk and piex and updated BUILD.gn to
build SkRawCodec.
We stopped testing raw images when we switched to GN, so this will
bring back our testing.
Leave SkRawCodec disabled on Windows, where we've had problems in the
past.
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4063
Change-Id: I956949506200b766a2f7efb18e0486f3a2f93a1c
Reviewed-on: https://skia-review.googlesource.com/4063
Commit-Queue: Leon Scroggins <scroggo@google.com>
Reviewed-by: Mike Klein <mtklein@chromium.org>
SkMovie is not used in any of our tests or by Chromium. It is also not
supported by GN. It is being moved into Android, its only client, so we
can delete it here.
giflib is only used by SkMovie, so stop pulling/building it.
TBR=reed@google.com
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=3945
Change-Id: I28a8155fd59e139bb21ec2295cc22fdced034284
Review-Url: https://codereview.chromium.org/2449213004
565 cannot take the !writeTransparentPixels path, so disable it for
cases where we might have to take that path.
This only affects frames beyond the first. If the first frame has
a transparent pixel, it will be marked as non-opaque, so we cannot
decode to 565 anyway.
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2441833002
Review-Url: https://codereview.chromium.org/2441833002
Add an interface to decode frames beyond the first in SkCodec, and
add an implementation for SkGifCodec.
Add getFrameData to SkCodec. This method reads ahead in the stream
to return a vector containing meta data about each frame in the image.
This is not required in order to decode frames beyond the first, but
it allows a client to learn extra information:
- how long the frame should be displayed
- whether a frame should be blended with a prior frame, allowing the
client to provide the prior frame to speed up decoding
Add a new fields to SkCodec::Options:
- fFrameIndex
- fHasPriorFrame
The API is designed so that SkCodec never caches frames. If a
client wants a frame beyond the first, they specify the frame in
Options.fFrameIndex. If the client does not have the
frame's required frame (the frame that this frame must be blended on
top of) cached, they pass false for
Options.fHasPriorFrame. Unless the frame is
independent, the codec will then recursively decode all frames
necessary to decode fFrameIndex. If the client has the required frame
cached, they can put it in the dst they pass to the codec, and the
codec will only draw fFrameIndex onto it.
Replace SkGifCodec's scanline decoding support with progressive
decoding, and update the tests accordingly.
Implement new APIs in SkGifCodec. Instead of using gif_lib, use
GIFImageReader, imported from Chromium (along with its copyright
headers) with the following changes:
- SkGifCodec is now the client
- Replace blink types
- Combine GIFColorMap::buildTable and ::getTable into a method that
creates and returns an SkColorTable
- Input comes from an SkStream, instead of a SegmentReader. Add
SkStreamBuffer, which buffers the (potentially partial) stream in
order to decode progressively.
(FIXME: This requires copying data that previously was read directly
from the SegmentReader. Does this hurt performance? If so, can we
fix it?)
- Remove UMA code
- Instead of reporting screen width and height to the client, allow the
client to query for it
- Fail earlier if the first frame AND screen have size of zero
- Compute required previous frame when adding a new one
- Move GIFParseQuery from GIFImageDecoder to GIFImageReader
- Allow parsing up to a specific frame (to skip parsing the rest of the
stream if a client only wants the first frame)
- Compute whether the first frame has alpha and supports index 8, to
create the SkImageInfo. This happens before reporting that the size
has been decoded.
Add GIFImageDecoder::haveDecodedRow to SkGifCodec, imported from
Chromium (along with its copyright header), with the following changes:
- Add support for sampling
- Use the swizzler
- Keep track of the rows decoded
- Do *not* keep track of whether we've seen alpha
Remove SkCodec::kOutOfOrder_SkScanlineOrder, which was only used by GIF
scanline decoding.
Call onRewind even if there is no stream (SkGifCodec needs to clear its
decoded state so it will decode from the beginning).
Add a method to SkSwizzler to access the offset into the dst, taking
subsetting into account.
Add a GM that animates a GIF.
Add tests for the new APIs.
*** Behavior changes:
* Previously, we reported that an image with a subset frame and no transparent
index was opaque and used the background index (if present) to fill the
background. This is necessary in order to support index 8, but it does not
match viewers/browsers I have seen. Examples:
- Chromium and Gimp render the background transparent
- Firefox, Safari, Linux Image Viewer, Safari Preview clip to the frame (for
a single frame image)
This CL matches Chromium's behavior and renders the background transparent.
This allows us to have consistent behavior across products and simplifies
the code (relative to what we would have to do to continue the old behavior
on Android). It also means that we will no longer support index 8 for some
GIFs.
* Stop checking for GIFSTAMP - all GIFs should be either 89a or 87a.
This matches Chromium. I suspect that bugs would have been reported if valid
GIFs started with "GIFVER" instead of "GIF89a" or "GIF87a" (but did not decode
in Chromium).
*** Future work not included in this CL:
* Move some checks out of haveDecodedRow, since they are the same for the
entire frame e.g.
- intersecting the frameRect with the full image size
- whether there is a color table
* Change when we write transparent pixels
- In some cases, Chromium deemed this unnecessary, but I suspect it is slower
than the fallback case. There will continue to be cases where we should
*not* write them, but for e.g. the first pass where we have already
cleared to transparent (which we may also be able to skip) writing the
transparent pixels will not make anything incorrect.
* Report color type and alpha type per frame
- Depending on alpha values, disposal methods, frame rects, etc, subsequent
frames may have different properties than the first.
* Skip copies of the encoded data
- We copy the encoded data in case the stream is one that cannot be rewound,
so we can parse and then decode (possibly not immediately). For some input
streams, this is unnecessary.
- I was concerned this cause a performance regression, but on average the
new code is faster than the old for the images I tested [1].
- It may cause a performance regression for Chromium, though, where we can
always move back in the stream, so this should be addressed.
Design doc:
https://docs.google.com/a/google.com/document/d/12Qhf9T92MWfdWujQwCIjhCO3sw6pTJB5pJBwDM1T7Kc/
[1] https://docs.google.com/a/google.com/spreadsheets/d/19V-t9BfbFw5eiwBTKA1qOBkZbchjlTC5EIz6HFy-6RI/
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