Tessellation code can just exist in the skgpu namespace.
Bug: skia:12524
Change-Id: I44d473c5f82d608bb6cd3bb9df239c4f4028da4f
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/461557
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
This is just a bunch of renaming, and for now the tessellate/shaders
directory remains untouched. The next steps will be to clean up and
remove all Ganesh v1 dependencies from tessellation.
Bug: skia:12524
Change-Id: I8cc166c0c78f9fb160de807131fa53fcc0765818
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/458876
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
This is in prep for compiling with -std=c++14 and -Wno-c++17-extensions
when building with clang. Chrome has encountered problems with
third_party headers that are included both in Skia and other Chrome
sources that produce different code based on whether preprocessor macros
indicate a C++14 or C++17 compilation.
In C++17 they are already inline implicitly. When compiling with C++14
we can get linker errors unless they're explicitly inlined or defined
outside the class. With -Wno-c++17-extensions we can explicitly inline
them in the C++14 build because the warning that would be generated
about using a C++17 language extension is suppressed.
We cannot do this in public headers because we support compiling with
C++14 without suppressing the C++17 language extension warnings.
Bug: chromium:1257145
Change-Id: Iaf5f4c62a398f98dd4ca9b7dfb86f2d5cab21d66
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/457498
Reviewed-by: Ben Wagner <bungeman@google.com>
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
Bug: skia:11837
Change-Id: Iaa0349749a5d79d7915fb37ef1b30b46f0aa58d6
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/448796
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
Also update RELEASE_NOTES to describe new syntax.
Change-Id: I2666551b98f80b61ae3a48c92a9e306cdc7242b0
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/444735
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: John Stiles <johnstiles@google.com>
Very originally, skif::Mapping::DecomposeCTM() and
SkBaseDevice::setDeviceCoordinateSystem assumed that if the canvas
matrix was invertible, then any scale decomposition would produce a
valid device coordinate system. This proved not to be true and fuzzers
quickly caught it, but I had attempted to address it by forcing
SkCanvas to do extra work so that the above two functions remained
unchanged.
However, it's become apparent that even making the assumption that the
product of two invertible matrices remains invertible does not always
hold true in the wonderful world of floating point math.
Instead, this rewrites DecomposeCTM and setDeviceCoordinateSystem to
return bools, allowing them to fail. This cleans up some of the earlier
checks that SkCanvas makes while computing the skif::Mapping, and it
also ensures that once we fold in the prior device's transform, the
net layer->global transform remains valid. If any of this fails, it
just gets rid of the new device and sets the clip to empty, basically
preventing drawing until the invalid layer has been restored.
Bug: chromium:1239968, chromium:1240685
Change-Id: Ib9ce8f95859e726a9eacf1154f6eef8dd3995500
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/442017
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
Bug: skia:12302
Change-Id: I8cf958acf9214d0de903a4097647afd74f2a659e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/441541
Reviewed-by: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
This CL just moves the files and renames them. It doesn't move them into the skgpu::v1 namespace.
Bug: skia:11837
Change-Id: Iab322d0dc5b5d1cfd32436785081539dc85c18d3
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/440776
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Chris Dalton <csmartdalton@google.com>
Having this enum on GrTessellationPathRenderer forced it to be over-#included and was blocking making GrTessellationPathRenderer.h v1-only.
Bug: skia:11837
Change-Id: I80660ed659946d7aa555057c9f4fd1136b44cca0
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/440536
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
Change-Id: I04da5871c668b1ed9ca8db7fdcbfe06a70ee227f
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/440079
Commit-Queue: Brian Salomon <bsalomon@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: Brian Salomon <bsalomon@google.com>
Reviewed-by: John Stiles <johnstiles@google.com>
Basically, ensure all the headers about to become V1-only only appear in contexts that are currently or will soon be V1-only.
This is almost all fallout from retracting some of the moving headers from other headers i.e.:
GrMeshDrawOp.h from GrOpFlushState.h
GrDrawOp.h from GrOpsRenderPass.h
GrDrawOp.h from GrOpsTask.h
GrSimpleMeshDrawOpHelper.h from GrTessellationShader.h
Bug: skia:11837
Change-Id: I939f5c82c3042e9ab00571b5796ab82dbe968085
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/438677
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
If we manage to fix all the existing cases of variable shadowing, we
could enable -Wshadow.
Change-Id: I4c476668a83a0054fe8624d5ffa650db202ba810
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/438376
Auto-Submit: John Stiles <johnstiles@google.com>
Commit-Queue: Derek Sollenberger <djsollen@google.com>
Reviewed-by: Derek Sollenberger <djsollen@google.com>
The SkClipOpPriv.h header will be going away soon, but a number of
places still use its kIntersect_SkClipOp definitions instead of the
equivalent SkClipOp::kIntersect. Besides updating these references,
a number of unnecessary includes to SkClipOpPriv.h are removed and
some test cases exercising expanding clip ops are deleted since they
will be unnecessary shortly.
Bug: skia:10208
Change-Id: I2bbdd6bb39869134c6a80ef2b4482e6cabdeb0b7
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/436157
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
These were reviewed last year at http://review.skia.org/312480 but never
landed. Splitting into small chunks to land individually.
If we manage to fix all the existing cases of variable shadowing, we
could enable -Wshadow.
Change-Id: I53d04e5b2ffd7e170a8b10a6bacbc239c8b5e7ff
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/435720
Commit-Queue: John Stiles <johnstiles@google.com>
Commit-Queue: Ravi Mistry <rmistry@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Ravi Mistry <rmistry@google.com>
This CL is mostly mechanical. It:
replaces "src/gpu/GrSurfaceDrawContext.h" #includes with
"src/gpu/v1/SurfaceDrawContext_v1.h" and reorders
replaces "class GrSurfaceDrawContext;" with
"namespace skgpu { namespace v1 { class SurfaceDrawContext; }}"
replaces "GrSurfaceDrawContext*" with "auto" where possible
replaces "rtc" with "sdc"
replaces "surfaceDrawContext" with "sdc"
replaces GrSurfaceDrawContext with skgpu::v1::SurfaceDrawContext
reflows parameters as needed
This CL does not try to:
make skgpu::v1::SurfaceDrawContext V1-only
minimize the skgpu and/or skgpu::v1 prefixes
Those two tasks will be accomplished in follow up CLs. This CL is just trying to get the bulk of the mechanical changes comprehensibly landed.
Bug: skia:11837
Change-Id: I6fe59080249d585df8f5d27c6b67569cdc35842f
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/433156
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
This allows us to batch multiple paths together in a single
tessellation. The first user will be the atlas, but the convex
renderer is also a good candidate.
Bug: skia:12258
Change-Id: I4d415d32bbf423cfd9b7ddf2543c21371936da90
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/433776
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
The pathMatrix is applied on the CPU while the geometry is being
written out. It is a tool for batching, and is applied in addition to
the shader's on-GPU matrix. This CL also updates GrPathStencilCoverOp
do do all its path transformations with pathMatrix on the CPU side.
The next step will be for atlases to use the pathMatrix instead of
creating uber paths.
Bug: skia:12258
Change-Id: Ib924dfb06a2c0eed8f9045adc6ae9eefad510082
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/433236
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
This is a reland of 6789b82401
Original change's description:
> Fix directional shadows.
>
> The xy offset calculation for drawShadow was not quite correct. Rather
> than normalizing the light vector and using the xy values of that as the
> base offset value, we should scale the light vector by 1/z.
>
> See https://github.com/flutter/engine/pull/27124#issuecomment-880182653
> for more detail.
>
> Bug: skia:10781
> Change-Id: Ib69a313cb96a532f8d89644e3d69f666a184e897
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/428880
> Reviewed-by: Brian Salomon <bsalomon@google.com>
> Commit-Queue: Jim Van Verth <jvanverth@google.com>
Bug: skia:10781
Change-Id: Ib58d374aa03d0144512e5ded6ccd572c74783607
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/428978
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
This reverts commit 6789b82401.
Reason for revert: Failing CK test.
Original change's description:
> Fix directional shadows.
>
> The xy offset calculation for drawShadow was not quite correct. Rather
> than normalizing the light vector and using the xy values of that as the
> base offset value, we should scale the light vector by 1/z.
>
> See https://github.com/flutter/engine/pull/27124#issuecomment-880182653
> for more detail.
>
> Bug: skia:10781
> Change-Id: Ib69a313cb96a532f8d89644e3d69f666a184e897
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/428880
> Reviewed-by: Brian Salomon <bsalomon@google.com>
> Commit-Queue: Jim Van Verth <jvanverth@google.com>
TBR=jvanverth@google.com,bsalomon@google.com
Change-Id: Id22c2113fc1b62109975b83a0dcda5b1b16380a8
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:10781
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/428977
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
The xy offset calculation for drawShadow was not quite correct. Rather
than normalizing the light vector and using the xy values of that as the
base offset value, we should scale the light vector by 1/z.
See https://github.com/flutter/engine/pull/27124#issuecomment-880182653
for more detail.
Bug: skia:10781
Change-Id: Ib69a313cb96a532f8d89644e3d69f666a184e897
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/428880
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
This is a reland of e58831cd95
Original change's description:
> Add format-specifier warnings to SkDebugf.
>
> This CL fixes up many existing format-specifier violations in Skia.
> Note that GCC has a warning for formatting nothing, so existing calls to
> `SkDebugf("")` have been removed, or replaced with `SkDebugf("%s", "")`.
> These were apparently meant to be used as a place to set a breakpoint.
>
> Some of our clients also use SkDebug with bad format specifiers, so this
> check is currently only enabled when SKIA_IMPLEMENTATION is true.
>
> Change-Id: I8177a1298a624c6936adc24e0d8f481362a356d0
> Bug: skia:12143
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/420902
> Auto-Submit: John Stiles <johnstiles@google.com>
> Commit-Queue: Brian Osman <brianosman@google.com>
> Reviewed-by: Brian Osman <brianosman@google.com>
Bug: skia:12143
Change-Id: Id3c0c21436ebd13899908d5ed5d44c42a0e23921
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/421918
Commit-Queue: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
This reverts commit e58831cd95.
Reason for revert: looks like breaking a few build bots
Original change's description:
> Add format-specifier warnings to SkDebugf.
>
> This CL fixes up many existing format-specifier violations in Skia.
> Note that GCC has a warning for formatting nothing, so existing calls to
> `SkDebugf("")` have been removed, or replaced with `SkDebugf("%s", "")`.
> These were apparently meant to be used as a place to set a breakpoint.
>
> Some of our clients also use SkDebug with bad format specifiers, so this
> check is currently only enabled when SKIA_IMPLEMENTATION is true.
>
> Change-Id: I8177a1298a624c6936adc24e0d8f481362a356d0
> Bug: skia:12143
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/420902
> Auto-Submit: John Stiles <johnstiles@google.com>
> Commit-Queue: Brian Osman <brianosman@google.com>
> Reviewed-by: Brian Osman <brianosman@google.com>
TBR=brianosman@google.com,ethannicholas@google.com,johnstiles@google.com
Change-Id: I07848c1bf8992925c9498e916744d0840355a077
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:12143
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/421917
Reviewed-by: Tyler Denniston <tdenniston@google.com>
Commit-Queue: Tyler Denniston <tdenniston@google.com>
This CL fixes up many existing format-specifier violations in Skia.
Note that GCC has a warning for formatting nothing, so existing calls to
`SkDebugf("")` have been removed, or replaced with `SkDebugf("%s", "")`.
These were apparently meant to be used as a place to set a breakpoint.
Some of our clients also use SkDebug with bad format specifiers, so this
check is currently only enabled when SKIA_IMPLEMENTATION is true.
Change-Id: I8177a1298a624c6936adc24e0d8f481362a356d0
Bug: skia:12143
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/420902
Auto-Submit: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
This is a reland of 7bf6bc0d06
Original change's description:
> Purge ccpr
>
> Now that the clip atlas has been successfully migrated to
> tessellation, we don't need this code anymore!
>
> Change-Id: Ic97f50cff7c4ee59f4476f8410f0b30a32df4e90
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/419857
> Reviewed-by: Robert Phillips <robertphillips@google.com>
> Reviewed-by: Brian Osman <brianosman@google.com>
> Commit-Queue: Chris Dalton <csmartdalton@google.com>
Change-Id: If0be86902e7cc4755eba91a89be1ec1a6a4b54b2
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/419720
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
This reverts commit 7bf6bc0d06.
Reason for revert: Android build references kCoverageCounting
Original change's description:
> Purge ccpr
>
> Now that the clip atlas has been successfully migrated to
> tessellation, we don't need this code anymore!
>
> Change-Id: Ic97f50cff7c4ee59f4476f8410f0b30a32df4e90
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/419857
> Reviewed-by: Robert Phillips <robertphillips@google.com>
> Reviewed-by: Brian Osman <brianosman@google.com>
> Commit-Queue: Chris Dalton <csmartdalton@google.com>
TBR=robertphillips@google.com,brianosman@google.com,csmartdalton@google.com,michaelludwig@google.com
Change-Id: I01d99287978f848eb8bf900c07cba90ceb3b6edc
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/419898
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Now that the clip atlas has been successfully migrated to
tessellation, we don't need this code anymore!
Change-Id: Ic97f50cff7c4ee59f4476f8410f0b30a32df4e90
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/419857
Reviewed-by: Robert Phillips <robertphillips@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
This is almost purely a query/replace CL (% the #include juggling).
The VisitProxyFunc is used by more than just the Ops and will probably
still be required in the NGA.
This is a prelude to making all the remaining GrOp-derived classes OGA-only.
Bug: skia:11837
Change-Id: If1c127e5c126c676be529ed2a61dd7953abb03d0
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/419162
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
This is a reland of bd727d0620TBR=jvanverth@google.com
Original change's description:
> Fix tessellation checks for "usesVaryingCoords"
>
> We can't use our hardware tessellation back door if any FPs in the
> program have varyings. Before this CL, we were forgetting to check the
> clip FP for strokes, and weren't checking any FPs yet for fills.
>
> Bug: skia:10419
> Change-Id: Ica631ab3cf0407fb359c02c6d53f88f5f301cddc
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/417237
> Reviewed-by: Greg Daniel <egdaniel@google.com>
> Commit-Queue: Chris Dalton <csmartdalton@google.com>
Bug: skia:10419
Change-Id: If8c1e18efc663641b2d565314110f66a6840f8bb
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/417317
Reviewed-by: Chris Dalton <csmartdalton@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
This reverts commit bd727d0620.
Reason for revert: Breaking builds.
Original change's description:
> Fix tessellation checks for "usesVaryingCoords"
>
> We can't use our hardware tessellation back door if any FPs in the
> program have varyings. Before this CL, we were forgetting to check the
> clip FP for strokes, and weren't checking any FPs yet for fills.
>
> Bug: skia:10419
> Change-Id: Ica631ab3cf0407fb359c02c6d53f88f5f301cddc
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/417237
> Reviewed-by: Greg Daniel <egdaniel@google.com>
> Commit-Queue: Chris Dalton <csmartdalton@google.com>
TBR=egdaniel@google.com,csmartdalton@google.com
Change-Id: I30d29f078d7b8cef146463feaaec0883ba5b9872
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:10419
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/417265
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
We can't use our hardware tessellation back door if any FPs in the
program have varyings. Before this CL, we were forgetting to check the
clip FP for strokes, and weren't checking any FPs yet for fills.
Bug: skia:10419
Change-Id: Ica631ab3cf0407fb359c02c6d53f88f5f301cddc
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/417237
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Bug: skia:10419
Change-Id: Icb3395565060d736624d03ba1465926bd9188e44
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/416078
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Jim Van Verth <jvanverth@google.com>
It was becoming a bit chaotic to have so many different algorithms in
one file.
Bug: skia:10419
Change-Id: I477b7b65439d16b0f983e10952cb41ec881e8183
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/413856
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
At present, only Xfer processors allow reading back from the destination
image since they are in charge of blending. However, we'd like to expose
the destination color to fragment processors and Runtime Effects in the
future. To make this possible, the DstProxyView will need to be
accessible outside of Xfer processors.
This CL migrates DstProxyView to be a top-level Ganesh class and fixes
up the references to it throughout Skia. It's interesting to note that
several call sites were already using typedefs to hide the class
nesting anyway.
Change-Id: I93a294aa097f9319a968503c4f2f7e4f388ff033
Bug: skia:12066
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/414899
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Merges the GrStrokePathShader and GrFillPathShader classes together.
Creates a new base class called GrPathTessellationShader. Now they all
have a uniform color and can all be draw to stencil and color both.
This is necessary cleanup in general, but will also allow us to create
a convex tessellation op that bypasses the stencil buffer.
Bug: skia:10419
Change-Id: Ifc492c94d3de044a36bd9ea95b1d5aa22e007905
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/413696
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
Now that hardware tessellators chop, support raw triangles, and can
handle any path, we don't need complicated logic anymore to determine
when we can't use them. This CL simplifies the criteria for selecting
a tessellation algorithm and adds a fAlwaysPreferHardwareTessellation
context option to override it.
Bug: skia:10419
Change-Id: I8492e8f285ff27eb9d0dd6b1e9817dbeeb386c63
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/411496
Reviewed-by: Brian Salomon <bsalomon@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Previously we would completely disable hardware tessellation for a path
if there was any chance of a curve requiring more segments than
supported by the hardware. This CL updates the tessellators to simply
chop paths until they fit in patches, allowing us to finally draw any
path using hardware tessellation.
Bug: skia:10419
Change-Id: I5c9f78cda3e30b8810aff3cb908235965706f2d8
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/410977
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Supports drawing exact triangles as conics with infinite weight. This
is necessary for drawing inner fans, breadcrumb triangles, and extra
triangles that will be introduced when we start splitting curves that
don't fit in a single patch.
Bug: skia:10419
Change-Id: If72560be4eb38340512be55dccea93b3a083fad5
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/410836
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
Use the GrPathTessellators directly instead of going through
GrPathStencilFillOp. Add keyboard shortcuts to toggle between the
different path tessellators.
Bug: skia:10419
Change-Id: I5d80731d26c9a77fb0eca07a7023c50848e29f7c
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/409556
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Tyler Denniston <tdenniston@google.com>
- most of the small diffs are because I moved GrWangsFormula.h out
of the tessellate/ directory and into the geometry/ directory since
it's more general than HW tessellation.
The previous implementation was based on the heuristic that the distance
from the true curve to the line segment would be divided by 4 every time
the curve was recursively subdivided. This was a reasonable
approximation if the curve had balanced curvature on both sides of the
split. However, in the case of the new GM's curve, the left half was
already very linear and the right half had much higher curves.
This lead to the approximation reporting fewer points than required.
Theoretically, those few points that weren't utilized by the left half
of the curve could have been made available to the right half, but the
implementation of that would be tricky.
Instead, it now uses Wang's formula to compute the number of points.
Since recursive subdivision leads to linearly spaced samples assuming it
can't stop early, this point count represents a valid upper bound on
what's needed. It also then ensures both left and right halves of a
curve have the point counts they might need w/o updating the
generation implementations. However, since the recursive point
generation exits once each section has reached the error tolerance, in
scenarios where the prior approximation was reasonable, we'll end up
using fewer points than reported by Wang's. Hopefully that means there
is negligible performance regression since we won't be increasing
vertex counts by that much (except where needed for correctness).
Bug: skia:11886
Change-Id: Iba39dbe4de82011775524583efd461b10c9259fe
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/405197
Reviewed-by: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
