Commit Graph

146 Commits

Author SHA1 Message Date
halcanary
34422610ac SkPDF: Optionally output PDF/A-2b archive format.
Note: this format does not yet pass validation tests.

Add skia_pdf_generate_pdfa GYP flag.  Default to off for now.
PDF/A files are not reproducable, so they make correctness
testing harder.

Turn the Metadata struct into te SkPDFMetadata struct.  This
splits out a lot of functionality around both kinds of metadata.

When PDF/A is used, add an ID entry to the trailer.

Add SkPDFObjNumMap::addObjectRecursively.

Test with

    GYP_DEFINES=skia_pdf_generate_pdfa=1 bin/sync-and-gyp
    ninja -C out/Release dm
    out/Release/dm --config pdf --src skp gm -w /tmp/dm

With skia_pdf_generate_pdfa=0, all PDFs generated from GMs and
SKPs are identical.  With skia_pdf_generate_pdfa=1, all PDFs
generated from GMs and SKPs render identically in Pdfium.

BUG=skia:3110

Review URL: https://codereview.chromium.org/1394263003
2015-10-12 10:11:18 -07:00
bungeman
21f99b7733 Revert of SkPDF: Optionally output PDF/A-2b archive format. (patchset #5 id:80001 of https://codereview.chromium.org/1394263003/ )
Reason for revert:
SkMD5 is not really part of the Skia library. This is breaking the roll by using it, since Chromium doesn't build it.

Original issue's description:
> SkPDF: Optionally output PDF/A-2b  archive format.
>
> Note: this format does not yet pass validation tests.
>
> Add skia_pdf_generate_pdfa GYP flag.  Default to off for now.
> PDF/A files are not reproducable, so they make correctness
> testing harder.
>
> Turn the Metadata struct into te SkPDFMetadata struct.  This
> splits out a lot of functionality around both kinds of metadata.
>
> When PDF/A is used, add an ID entry to the trailer.
>
> Add SkPDFObjNumMap::addObjectRecursively.
>
> Test with
>
>     GYP_DEFINES=skia_pdf_generate_pdfa=1 bin/sync-and-gyp
>     ninja -C out/Release dm
>     out/Release/dm --config pdf --src skp gm -w /tmp/dm
>
> With skia_pdf_generate_pdfa=0, all PDFs generated from GMs and
> SKPs are identical.  With skia_pdf_generate_pdfa=1, all PDFs
> generated from GMs and SKPs render identically in Pdfium.
>
> BUG=skia:3110
>
> Committed: https://skia.googlesource.com/skia/+/939c0fe51f157104758bcb268643c8b6d317a530

TBR=tomhudson@google.com,halcanary@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:3110

Review URL: https://codereview.chromium.org/1398193002
2015-10-09 13:45:50 -07:00
halcanary
939c0fe51f SkPDF: Optionally output PDF/A-2b archive format.
Note: this format does not yet pass validation tests.

Add skia_pdf_generate_pdfa GYP flag.  Default to off for now.
PDF/A files are not reproducable, so they make correctness
testing harder.

Turn the Metadata struct into te SkPDFMetadata struct.  This
splits out a lot of functionality around both kinds of metadata.

When PDF/A is used, add an ID entry to the trailer.

Add SkPDFObjNumMap::addObjectRecursively.

Test with

    GYP_DEFINES=skia_pdf_generate_pdfa=1 bin/sync-and-gyp
    ninja -C out/Release dm
    out/Release/dm --config pdf --src skp gm -w /tmp/dm

With skia_pdf_generate_pdfa=0, all PDFs generated from GMs and
SKPs are identical.  With skia_pdf_generate_pdfa=1, all PDFs
generated from GMs and SKPs render identically in Pdfium.

BUG=skia:3110

Review URL: https://codereview.chromium.org/1394263003
2015-10-09 13:09:58 -07:00
hendrikw
b1ac52fb0f Skia: Add Command Buffer support to Linux/Mac
Code added to load libcommand_buffer_gles2.so on linux or
mac.

Review URL: https://codereview.chromium.org/1346423002
2015-10-01 18:29:34 -07:00
hendrikw
6f0fdac9e7 skia: Add support for ANGLE on linux
This will allow the ANGLE guys to test the ANGLE gl backend
with nanobench and DM

Review URL: https://codereview.chromium.org/1343193005
2015-09-23 11:35:55 -07:00
mtklein
b1c56ec01e unplumb sknx_no_simd
BUG=skia:

Review URL: https://codereview.chromium.org/1355833002
2015-09-18 06:50:38 -07:00
hendrikw
885bf09255 skia: add ability to load command_buffer_gles2
BUG=skia:

Review URL: https://codereview.chromium.org/1306823003
2015-08-27 10:38:39 -07:00
jvanverth
65bd7ae374 Add gyp support for new GPU backend
Review URL: https://codereview.chromium.org/1287023006
2015-08-12 12:58:13 -07:00
egdaniel
4b5472bdb0 Add ability to pass in an optional path to additional unit tests to run.
BUG=skia:

Review URL: https://codereview.chromium.org/1280133004
2015-08-12 06:51:08 -07:00
halcanary
8ee06f21a2 SkPDF: allow PDF module to be disabled in DM and SampleApp
To disable PDF:

    GYP_DEFINES='skia_pdf=0' bin/sync-and-gyp
    ninja -C out/Debug dm SampleApp

When disabled, SkDocument::CreatePDF() always returns NULL.

Review URL: https://codereview.chromium.org/1279123007
2015-08-11 10:30:12 -07:00
halcanary
9f8754f591 Remove experimental/PdfViewer
Motivation: maintaining this code doesn't seem worth the time,
since no one seems to be using it.  If someone wants to use it
in the future, just revert this CL.

Review URL: https://codereview.chromium.org/1266093003
2015-08-04 14:08:44 -07:00
Brian Salomon
4239fc2f69 Remove skia_arch_width, fold into skia_arch_type.
DOCS_PREVIEW= https://skia.org/?cl=1228553010

BUG=skia:4042
R=borenet@google.com, mtklein@google.com

Review URL: https://codereview.chromium.org/1228553010
2015-07-27 09:10:36 -04:00
borenet
243406e580 Add skia_use_android_framework_defines GYP_DEFINE
BUG=skia:4082

Review URL: https://codereview.chromium.org/1243383002
2015-07-22 13:29:25 -07:00
hendrikw
10b371c6e3 ANGLE deps roll
If we ever want to allow the command buffer as a skia gles2 backend,
we need a more up to date version of ANGLE, specifically there are
4 defines that differ between newer and older versions of ANGLE which
we use in skia, I've updated these in this change.

I'm not quite sure if what I've done for the 'angle_path' is correct,
I tried setting it to a path relative to skia, and to '<(DEPTH)', both
of which do not compile correctly, only '../' worked.

Committed: https://skia.googlesource.com/skia/+/db0b1e796ddbd08e6be8a666537318b1c0e2ce56

Review URL: https://codereview.chromium.org/1244843003
2015-07-21 14:50:08 -07:00
hendrikw
cd94d7341f Revert of skia: ANGLE deps roll (patchset #1 id:1 of https://codereview.chromium.org/1244843003/)
Reason for revert:
Compile error that the try bots didn't catch :(

Original issue's description:
> ANGLE deps roll
>
> If we ever want to allow the command buffer as a skia gles2 backend,
> we need a more up to date version of ANGLE, specifically there are
> 4 defines that differ between newer and older versions of ANGLE which
> we use in skia, I've updated these in this change.
>
> I'm not quite sure if what I've done for the 'angle_path' is correct,
> I tried setting it to a path relative to skia, and to '<(DEPTH)', both
> of which do not compile correctly, only '../' worked.
>
> Committed: https://skia.googlesource.com/skia/+/db0b1e796ddbd08e6be8a666537318b1c0e2ce56

TBR=bsalomon@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/1245223007
2015-07-21 14:06:10 -07:00
hendrikw
db0b1e796d ANGLE deps roll
If we ever want to allow the command buffer as a skia gles2 backend,
we need a more up to date version of ANGLE, specifically there are
4 defines that differ between newer and older versions of ANGLE which
we use in skia, I've updated these in this change.

I'm not quite sure if what I've done for the 'angle_path' is correct,
I tried setting it to a path relative to skia, and to '<(DEPTH)', both
of which do not compile correctly, only '../' worked.

Review URL: https://codereview.chromium.org/1244843003
2015-07-21 13:18:27 -07:00
mtklein
4abc186d02 Add a GYP flag to define SKNX_NO_SIMD when set.
Will use this with a new -SKNX_NO_SIMD bot.

BUG=skia:

Review URL: https://codereview.chromium.org/1227163016
2015-07-14 05:52:52 -07:00
djsollen
b2a6fe7976 Enable both static and dynamically linked libpng
All platforms except android are configured to use the statically linked copy
of libpng. Android uses the system provided dynamic copy for SkImageDecoder
and the static copy for SkCodec. The exception being android framework builds
that currently use the dynamic copy everywhere.

This CL also enables NEON optimizations for libpng.

Review URL: https://codereview.chromium.org/1058823002
2015-04-03 12:35:27 -07:00
borenet
4808757d7a Remove all code related to NaCl
BUG=skia:3600
DOCS_PREVIEW= https://skia.org/?cl=1036283002

Review URL: https://codereview.chromium.org/1036283002
2015-04-02 12:16:36 -07:00
djsollen
1865900525 Revert of Enable both static and dynamically linked libpng (patchset #4 id:60001 of https://codereview.chromium.org/1032253003/)
Reason for revert:
breaking the nexus_9 and ios builds.

Original issue's description:
> Enable both static and dynamically linked libpng
>
> All platforms except android are configured to use the statically linked copy of libpng.  Android uses the system provided dynamic copy for SkImageDecoder and the static copy for SkCodec. The exception being android framework builds that currently use the dynamic copy everywhere.
>
> This CL also enables NEON optimizations for libpng.
>
> Committed: https://skia.googlesource.com/skia/+/2469c999518e7b0063d35e9e2eb074a0477c21ac

TBR=scroggo@google.com,msarett@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/1050183002
2015-04-01 11:20:12 -07:00
djsollen
2469c99951 Enable both static and dynamically linked libpng
All platforms except android are configured to use the statically linked copy of libpng.  Android uses the system provided dynamic copy for SkImageDecoder and the static copy for SkCodec. The exception being android framework builds that currently use the dynamic copy everywhere.

This CL also enables NEON optimizations for libpng.

Review URL: https://codereview.chromium.org/1032253003
2015-04-01 10:33:55 -07:00
bungeman
5c9fa2844c Add option to embed font data into executable.
Some tools would like to be built with all resources embedded.
This change makes it possible to build a font manager which
uses font data embedded into the executable.

Review URL: https://codereview.chromium.org/1015723004
2015-03-30 12:53:48 -07:00
msarett
6d0e7b2031 WIP: Added support for giflib, updated jpeg and png
BUG=skia:3257

Committed: https://skia.googlesource.com/skia/+/255dcd11992ebe74eb54202c48cf5394d33a8ce6

Review URL: https://codereview.chromium.org/1038863003
2015-03-30 07:52:52 -07:00
borenet
00c95098c3 Revert of WIP: Added support for giflib, updated jpeg and png (patchset #8 id:260001 of https://codereview.chromium.org/1038863003/)
Reason for revert:
Trying out revert to see if it fixes Android bots.

Original issue's description:
> WIP: Added support for giflib, updated jpeg and png
>
> BUG=skia:3257
>
> Committed: https://skia.googlesource.com/skia/+/255dcd11992ebe74eb54202c48cf5394d33a8ce6

TBR=djsollen@google.com,scroggo@google.com,msarett@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:3257

Review URL: https://codereview.chromium.org/1048713003
2015-03-30 05:51:49 -07:00
msarett
255dcd1199 WIP: Added support for giflib, updated jpeg and png
BUG=skia:3257

Review URL: https://codereview.chromium.org/1038863003
2015-03-27 12:17:00 -07:00
mtklein
dee3df930b Add a go-fast button to Skia GYP configs.
./gyp_skia -Dskia_fast=1 will
  - always optimize for the current machine as much as possible
  - drop the frame pointer
  - optimize floating point arithmetic ignoring IEEE compliance

This allows things like 3-argument VEX prefix SSE instructions and
NEON autovectorization, and can give some seriously helpful clues
about how to rearrange floating point math for speed.

I've been having trouble with LTO linking, so I'll leave that out for now.

I don't think we should set up bots with this mode.  -ffast-math means
I'm forced to run DM with --match ~Blend ~Path ~Rect ~Math ~Scalar
~Matrix ~Point before it passes, which is a disconcerting chunk of tests
to disable (including all of PathOps).

BUG=skia:

Review URL: https://codereview.chromium.org/1036533003
2015-03-26 05:30:44 -07:00
mtklein
22712569a5 Clean up poppler code.
We're not actually using it.

BUG=skia:3362
DOCS_PREVIEW= https://skia.org/?cl=1002493002

Review URL: https://codereview.chromium.org/1002493002
2015-03-11 11:55:14 -07:00
egdaniel
86e31a1980 Allow user to pass in a path for extra dependencies for gpu
BUG=skia:

Review URL: https://codereview.chromium.org/986363002
2015-03-09 09:40:42 -07:00
scroggo
f9b31ebc79 Return to building libpng_static off of Android.
Fixes the fix in https://codereview.chromium.org/971243003/, to
build places that are not Android.

TBR=mtklein@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/973863002
2015-03-03 09:39:58 -08:00
scroggo
3b234f737b Build the Android version of PNG on Android.
Fixes Android build failures.

Android builds a custom version of libpng (instead of the one
determined by skia_libpng_static) which supplies extra needed
functions.

TBR=mtklein@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/971243003
2015-03-03 09:34:58 -08:00
scroggo
f24f2247c2 Add SkCodec, including PNG implementation.
DM:
Add a flag to use SkCodec instead of SkImageDecoder.

SkCodec:
Base class for codecs, allowing creation from an SkStream or an SkData.
An SkCodec, on creation, knows properties of the data like its width and height. Further calls can be used to generate the image.
TODO: Add scanline iterator

SkPngCodec:
New decoder for png. Wraps libpng. The code has been repurposed from SkImageDecoder_libpng.
TODO: Handle other destination colortypes
TODO: Substitute the transpose color
TODO: Allow silencing warnings
TODO: Use RGB instead of filler?
TODO: sRGB

SkSwizzler:
Simplified version of SkScaledSampler. Unlike the sampler, this object does no sampling.
TODO: Implement other swizzles.

Requires a gclient sync to pull down libpng.

BUG=skia:3257

Committed: https://skia.googlesource.com/skia/+/ca358852b4fed656d11107b2aaf28318a4518b49
(and then reverted)

Review URL: https://codereview.chromium.org/930283002
2015-03-03 08:59:20 -08:00
scroggo
ee1a726aed Revert of Add SkCodec, including PNG implementation. (patchset #24 id:460001 of https://codereview.chromium.org/930283002/)
Reason for revert:
Breaking windows bots all over the place :(

Original issue's description:
> Add SkCodec, including PNG implementation.
>
> DM:
> Add a flag to use SkCodec instead of SkImageDecoder.
>
> SkCodec:
> Base class for codecs, allowing creation from an SkStream or an SkData.
> An SkCodec, on creation, knows properties of the data like its width and height. Further calls can be used to generate the image.
> TODO: Add scanline iterator
>
> SkPngCodec:
> New decoder for png. Wraps libpng. The code has been repurposed from SkImageDecoder_libpng.
> TODO: Handle other destination colortypes
> TODO: Substitute the transpose color
> TODO: Allow silencing warnings
> TODO: Use RGB instead of filler?
> TODO: sRGB
>
> SkSwizzler:
> Simplified version of SkScaledSampler. Unlike the sampler, this object does no sampling.
> TODO: Implement other swizzles.
>
> BUG=skia:3257
>
> Committed: https://skia.googlesource.com/skia/+/ca358852b4fed656d11107b2aaf28318a4518b49

TBR=reed@google.com,djsollen@google.com,msarett@google.com,mtklein@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:3257

Review URL: https://codereview.chromium.org/972743003
2015-03-02 12:31:12 -08:00
scroggo
ca358852b4 Add SkCodec, including PNG implementation.
DM:
Add a flag to use SkCodec instead of SkImageDecoder.

SkCodec:
Base class for codecs, allowing creation from an SkStream or an SkData.
An SkCodec, on creation, knows properties of the data like its width and height. Further calls can be used to generate the image.
TODO: Add scanline iterator

SkPngCodec:
New decoder for png. Wraps libpng. The code has been repurposed from SkImageDecoder_libpng.
TODO: Handle other destination colortypes
TODO: Substitute the transpose color
TODO: Allow silencing warnings
TODO: Use RGB instead of filler?
TODO: sRGB

SkSwizzler:
Simplified version of SkScaledSampler. Unlike the sampler, this object does no sampling.
TODO: Implement other swizzles.

BUG=skia:3257

Review URL: https://codereview.chromium.org/930283002
2015-03-02 12:23:48 -08:00
mtklein
ee2a3eaf99 Revert of Default SK_ANGLE to true on Windows, run angle whenever possible on bots. (patchset #3 id:40001 of https://codereview.chromium.org/946933006/)
Reason for revert:
Needs bot upgrades.

Original issue's description:
> Default SK_ANGLE to true on Windows, run angle whenever possible on bots.
>
> nanobench doesn't need an update.  It uses the default for --config,
> which includes angle.
>
> BUG=skia:
>
> Committed: https://skia.googlesource.com/skia/+/88ec329b580a081d9d56cbcaad0ee46cb941c849

TBR=bsalomon@google.com,mtklein@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review URL: https://codereview.chromium.org/954243002
2015-02-25 08:16:19 -08:00
mtklein
88ec329b58 Default SK_ANGLE to true on Windows, run angle whenever possible on bots.
nanobench doesn't need an update.  It uses the default for --config,
which includes angle.

BUG=skia:

Review URL: https://codereview.chromium.org/946933006
2015-02-25 07:56:07 -08:00
mtklein
1e4e814c03 SK_NO_FLATE
Also remove skia_zlib_static.  We're not using it.  We don't even have zlib in DEPS.

No public API changes.
TBR=reed@google.com

BUG=skia:

Review URL: https://codereview.chromium.org/936583002
2015-02-17 13:10:43 -08:00
scroggo
df1c3373fc Don't use m32 cflag for x86_64.
When checking the skia_arch_type for "x86", instead of doing an
== compare, check if "x86" in skia_arch_type, so it will cover
both x86 and x86_64.

Except when we specifically want x86.

Set skia_arch_width based on "64" in skia_arch_type. No need to specify
in scripts.

In gyp_to_android.py, create a separate var_dict for x86_64.

BUG=skia:3419

Review URL: https://codereview.chromium.org/916113002
2015-02-12 10:48:25 -08:00
mtklein
f19ec511b1 WAE on Macs too. That leaves only Android framework builds.
Will rebase after yours lands.

BUG=skia:

Committed: https://skia.googlesource.com/skia/+/161b6dee11a67e877ef5b339b17775b8e44c5927

Review URL: https://codereview.chromium.org/804063002
2014-12-15 10:38:42 -08:00
mtklein
616e45194e Revert of WAE on Macs too. That leaves only Android framework builds. (patchset #3 id:40001 of https://codereview.chromium.org/804063002/)
Reason for revert:
Forgot CrOS and NaCl builds.

Original issue's description:
> WAE on Macs too.  That leaves only Android framework builds.
>
> Will rebase after yours lands.
>
> BUG=skia:
>
> Committed: https://skia.googlesource.com/skia/+/161b6dee11a67e877ef5b339b17775b8e44c5927

TBR=bsalomon@google.com,mtklein@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review URL: https://codereview.chromium.org/805043002
2014-12-15 09:49:12 -08:00
mtklein
161b6dee11 WAE on Macs too. That leaves only Android framework builds.
Will rebase after yours lands.

BUG=skia:

Review URL: https://codereview.chromium.org/804063002
2014-12-15 09:45:00 -08:00
bsalomon
0aa5cea869 fix last warnings on w64 and turn on w.a.e.
Review URL: https://codereview.chromium.org/801413002
2014-12-15 09:13:35 -08:00
jvanverth
4736e1434a Get gpudft support working in dm, gm, nanobench and bench_pictures
Adds a new config to test distance field text.
Clean up some flags and #defines to read "distance field text",
not "distance field fonts" to be consistent with Chromium

NOTREECHECKS=true

Committed: https://skia.googlesource.com/skia/+/06ba179838ba4fe187cf290750aeeb4a02a2960b

Review URL: https://codereview.chromium.org/699453005
2014-11-07 07:12:46 -08:00
jvanverth
aa30ab3079 Revert of Get gpudft support working in dm, gm, nanobench and bench_pictures (patchset #2 id:20001 of https://codereview.chromium.org/699453005/)
Reason for revert:
Not compiling in ANGLE build

Original issue's description:
> Get gpudft support working in dm, gm, nanobench and bench_pictures
>
> Adds a new config to test distance field text.
> Clean up some flags and #defines to read "distance field text",
> not "distance field fonts" to be consistent with Chromium
>
> NOTREECHECKS=true
>
> Committed: https://skia.googlesource.com/skia/+/06ba179838ba4fe187cf290750aeeb4a02a2960b

TBR=bsalomon@google.com,mtklein@google.com,reed@google.com
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/707723005
2014-11-06 13:52:45 -08:00
jvanverth
06ba179838 Get gpudft support working in dm, gm, nanobench and bench_pictures
Adds a new config to test distance field text.
Clean up some flags and #defines to read "distance field text",
not "distance field fonts" to be consistent with Chromium

NOTREECHECKS=true

Review URL: https://codereview.chromium.org/699453005
2014-11-06 13:38:52 -08:00
derekf
29dda80c01 Add support for EGL on linux
Allow setting skia_egl=1 to build skia against EGL instead of GLX on unix

Review URL: https://codereview.chromium.org/604853003
2014-10-01 10:52:52 -07:00
borenet
e33985a56d Revert "Add support for EGL on linux"
This reverts commit 1cea736c32.

Caused segfaults on all Android devices

R=bsalomon@google.com, djsollen@google.com
TBR=bsalomon, djsollen
NOTRY=true
BUG=skia:

Author: borenet@google.com

Review URL: https://codereview.chromium.org/599493003
2014-09-24 05:31:07 -07:00
derekf
1cea736c32 Add support for EGL on linux
Allow setting skia_egl=1 to build skia against EGL instead of GLX on unix

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

Author: derekf@osg.samsung.com

Review URL: https://codereview.chromium.org/543363004
2014-09-23 15:17:36 -07:00
mtklein
a7e930f640 On the bots, there's no need to link GMs into SampleApp.
We build SampleApp on the bots to make sure it's not broken, but we don't run it.  So, there's no need to link in all the GMs as samples.

This reduces the number of copies of our GMs from 4 to 3 (gm, dm, and nanobench remain).

NOTREECHECKS=true

BUG=skia:2142
R=bsalomon@google.com, mtklein@google.com

Author: mtklein@chromium.org

Review URL: https://codereview.chromium.org/447803002
2014-08-06 10:08:42 -07:00
mtklein
2f4a69d377 Clean up skia_directwrite GYP variable.
BUG=skia:
R=bungeman@google.com, mtklein@google.com

Author: mtklein@chromium.org

Review URL: https://codereview.chromium.org/435553004
2014-07-31 15:31:08 -07:00
scroggo
c0bc913451 Introduce skia_pic gyp variable.
skia_pic tells ninja to use -fPIC when building for position
independent code.

Set skia_pic to true when building our existing targets that
require position independent code.

Also use skia_pic when building for Android.

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

Author: scroggo@google.com

Review URL: https://codereview.chromium.org/406613003
2014-07-22 12:09:30 -07:00