This CL may not really be necessary since it seems that the Android Ones we have fall back to mediump when highp isn't supported.
FYI, for bits-of-precision/precision we have:
Low Med High Precision-Used
A1 (Cherry One - Mali 400) 10 10 0 Med - conic looks bad
N5 (Adreno 330) 10 10 23 High - conic looks bad!!!
N6 (Adreno 420) 10 10 23 High - conic looks good
N7v2 (Adreno 320) 10 10 23 High - conic looks bad!!!
N9 (K1) 23 23 23 High - looks good
N10 (Mail-604) 10 10 23 High - looks good
I suspect derivative computation is broken on the Adreno 300s.
BUG=555779,skia:4668
TBR=bsalomon@google.com
Review URL: https://codereview.chromium.org/1513573009
Reason for revert:
Co-centered sample locations are not needed to do stencil clip with mixed samples
Original issue's description:
> Implement stencil clipping in mixed sampled render targets
>
> This change enables multisampled clipping for mixed sampled
> render targets. Previously clipping in mixed samples config
> behaved the same as in the gpu config.
>
> In order to retrofit non-MSAA draw methods, programmable sample
> locations are used in order to colocate all samples at (0.5, 0.5).
> Requires support for NV_sample_locations.
>
> BUG=skia:4399
>
> Committed:
> https://skia.googlesource.com/skia/+/3e77ba96d56d15db30ac6d8ccb900e30aafcbb16
BUG=skia:
Review URL: https://codereview.chromium.org/1415873011
Reason for revert:
Co-centered sample locations are not needed to do stencil clip with mixed samples.
Original issue's description:
> Fix mixed samples stencil clip
>
> Fixes rendering bugs and nondeterminism in gm.
>
> Before, mixed samples stencil clip would try to infer whether the draw
> wanted co-centered sample locations from within GrGLGpu, which caused
> various errors. This change reworks it so the draw itself can request
> the co-centered sample locations when it knows it will need them.
>
> Also reduces framebuffer binds by moving the code that enables
> GL_FRAMEBUFFER_PROGRAMMABLE_SAMPLE_LOCATIONS into flushRenderTarget.
>
> Committed: https://skia.googlesource.com/skia/+/14184d5567b58085b6d8a6375796d405056f7f73TBR=bsalomon@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
Review URL: https://codereview.chromium.org/1407063011
Fixes rendering bugs and nondeterminism in gm.
Before, mixed samples stencil clip would try to infer whether the draw
wanted co-centered sample locations from within GrGLGpu, which caused
various errors. This change reworks it so the draw itself can request
the co-centered sample locations when it knows it will need them.
Also reduces framebuffer binds by moving the code that enables
GL_FRAMEBUFFER_PROGRAMMABLE_SAMPLE_LOCATIONS into flushRenderTarget.
Review URL: https://codereview.chromium.org/1431593006
Quits requiring EXT_raster_multisample and
NV_sample_mask_override_coverage for mixed samples support. This will
allow platforms without those latter extensions (i.e. Chrome) to still
use mixed samples for path rendering. Also moves the mixed samples cap
out of shader caps, since it no longer denotes shader functionality.
BUG=skia:
Review URL: https://codereview.chromium.org/1410383011
This allows internal Gr texture creation code to succeed for extraneous textures while running the bleed GM. This means we can turn on the shader variants.
Review URL: https://codereview.chromium.org/1418473004
This change enables multisampled clipping for mixed sampled
render targets. Previously clipping in mixed samples config
behaved the same as in the gpu config.
In order to retrofit non-MSAA draw methods, programmable sample
locations are used in order to colocate all samples at (0.5, 0.5).
Requires support for NV_sample_locations.
BUG=skia:4399
Review URL: https://codereview.chromium.org/1232103002
