It isn't necessary for the vertex shader to know all the points
because everything happens in the geometry shader. It's simpler to use
regular vertex arrays instead.
Bug: skia:
Change-Id: I7bf83180476fbe0ab01492611cd72e72b3f7d4f2
Reviewed-on: https://skia-review.googlesource.com/82881
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Points cost 8 bytes and indices cost 4. If a point is accessed twice,
it's a wash whether we duplicate it or index. This change eliminates
texel buffers by duplicating points across instance arrays. This
reduces our dependence on extensions as well as getting rid of our
indirect memory access pattern in vertex shaders.
As a result of this change, memory usage by GPU buffers will only be a
fraction larger at worst, and slightly better at best.
Bug: skia:
Cq-Include-Trybots: skia.primary:Test-Debian9-Clang-GCE-CPU-AVX2-x86_64-Release-All-SKNX_NO_SIMD
Change-Id: I3c7f03772edd4f850d5fdd7b55552647335c1b52
Reviewed-on: https://skia-review.googlesource.com/79185
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Bug: skia:
Change-Id: I41480aa89dfcd8cb7e016e477cbabe354f35ce8a
Reviewed-on: https://skia-review.googlesource.com/75480
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Defers the transformation to normalized window coordinates until after
the geometry shader. Merges vertex and a geometry shader builders into
a single compilation unit with a common base class. Updates CCPR
geometry shaders accordingly.
Bug: skia:
Change-Id: If93c90e978b1fdc7120febd05cfb05810fd496b5
Reviewed-on: https://skia-review.googlesource.com/62980
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Decouples geometry generation and analytic coverage. This paves the
way for a vertex shader implementation.
TBR=egdaniel@google.com
Bug: skia:
Change-Id: I2a183401bfe70b9f14b9b1cf035de6020a2135fa
Reviewed-on: https://skia-review.googlesource.com/60103
Reviewed-by: Chris Dalton <csmartdalton@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
This reverts commit e501033bbd.
Reason for revert: Broke several bots
Original change's description:
> Refactor CCPR coverage shaders for a vertex impl
>
> Decouples geometry generation and analytic coverage. This paves the
> way for a vertex shader implementation.
>
> Bug: skia:
> Change-Id: I23b79d4397db22bd8fc063b8dfca58ab00037292
> Reviewed-on: https://skia-review.googlesource.com/59200
> Commit-Queue: Chris Dalton <csmartdalton@google.com>
> Reviewed-by: Greg Daniel <egdaniel@google.com>
TBR=egdaniel@google.com,csmartdalton@google.com
# Not skipping CQ checks because original CL landed > 1 day ago.
Bug: skia:
Change-Id: I314bf03fa6cbeceb1c527d4d9464147b2e8464c6
Reviewed-on: https://skia-review.googlesource.com/59821
Reviewed-by: Eric Boren <borenet@google.com>
Commit-Queue: Eric Boren <borenet@google.com>
Decouples geometry generation and analytic coverage. This paves the
way for a vertex shader implementation.
Bug: skia:
Change-Id: I23b79d4397db22bd8fc063b8dfca58ab00037292
Reviewed-on: https://skia-review.googlesource.com/59200
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
Removes the mode that generates edge and hull geometry simultaneously
from the geometry shader. Perf was hit and miss and it's not
compatible with vertex shaders. We can revisit if geometry shaders
still show promise on some platforms after a vertex shader impl is
finished.
Bug: skia:
Change-Id: I984231e9a5bb60fe31d3ba280c7390a74aa5bc27
Reviewed-on: https://skia-review.googlesource.com/51300
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Bug: skia:6173
Change-Id: I21042d484d9a7b3eee04aa3301d9793d00ad6908
Reviewed-on: https://skia-review.googlesource.com/48183
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Avoids the need for MSAA cubic borders by chopping up the cubic
geometry and crossing the inflections points and loop intersections
with lines and quadratic(s) instead. This allows us to render the
remaining cubic segments with simple hulls and analytic AA, giving
better image quality and performance.
Bug: skia:
Change-Id: If371229f575ee0286c325c230a116d602a9d38ce
Reviewed-on: https://skia-review.googlesource.com/41883
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
Creates a GrCCPRGeometry class that chops contours up into simple
segments that ccpr can render, and rewrites the GPU buffer creation to
be able to handle arbitrary lengths of ccpr geometry.
Bug: skia:
Change-Id: Iaa173a02729e177b0ed7ef7fbb9195d349be689d
Reviewed-on: https://skia-review.googlesource.com/41963
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Enough ccpr-specific geometry code is in flight that it feels like it
should have its own file.
Bug: skia:
Change-Id: I99ef620a7dc35178cf774b3a4ec6159d46f401c7
Reviewed-on: https://skia-review.googlesource.com/39162
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
The artifacts previously thought to require msaa can be handled by
(1) converting near-linear quadratics into lines, and (2) ensuring all
quadratic segments are monotonic with respect to the vector of their
closing edge [P2 -> P0].
No. 1 was already in effect.
No. 2 is implemented by this change.
Now we only fall back on soft msaa for the two corner pixels.
This change also does some generic housekeeping in the quadratic
processor.
Bug: skia:
Change-Id: Ib3309c2ed86d3d8bec5f451125a69326e82eeb1c
Reviewed-on: https://skia-review.googlesource.com/29721
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
In a future world where GrSurface no longer has an origin it will be
useful for the GrPipeline to be holding the GrRenderTargetProxy (which will
still have an origin).
Change-Id: I743a8cc07b6b92f8116227fb77b7c37da43cde8a
Reviewed-on: https://skia-review.googlesource.com/26804
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
Initial implementation of a GPU path renderer that draws antialiased
paths by counting coverage in an offscreen buffer.
Initially disabled until it has had time to soak.
Bug: skia:
Change-Id: I003d8cfdf8dc62641581b5ea2dc4f0aa00108df6
Reviewed-on: https://skia-review.googlesource.com/21541
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
