| 54ef7c057ac9cc8ff9cb18eba864686dd59c2d93 |
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25-Aug-2017 |
Jim Van Verth <jvanverth@google.com> |
Don't use uninitialized gamma data for adjusting SDF distance.
If the gamma is linear, the corresponding LUT for adjusting colors
is not initialized. This change takes that into account when computing
distance adjustments for SDF text.
Change-Id: I7ca1410bb27cf29ef08ccd666297bf5c3cd3dcdd
Reviewed-on: https://skia-review.googlesource.com/38940
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
/external/skia/src/gpu/text/GrDistanceFieldAdjustTable.cpp
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| b461d3457567cf79a3efac3123c00f7afc37fecb |
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13-Apr-2016 |
brianosman <brianosman@google.com> |
Rename lots of things from 'sRGB' to 'GammaCorrect', where appropriate
Trying to be much more explicit about where we really mean sRGB as a format,
and where we mean gamma-correct, as in: "not legacy behavior". Most of the
changes to rendering behavior are dependent on the latter, so let's be precise.
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1884873006
Review URL: https://codereview.chromium.org/1884873006
/external/skia/src/gpu/text/GrDistanceFieldAdjustTable.cpp
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| 0586f5cc9713268238394411a5daa2c7758b092b |
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12-Apr-2016 |
brianosman <brianosman@google.com> |
sRGB support for distance field text.
Add a second distance field adjust table that only applies contrast,
not fake-gamma correction. Store a flag in the batch at creation time,
using the same logic we apply elsewhere (render target format, plus
paint flags).
That gets us close, but not as good as bitmap text. The final step is
to use a linear step function (rather than smoothstep) to map distance
to coverage, when we have sRGB output. Smoothstep's nonlinear response
is actually doing some fake-gamma, so it ends up over-correcting when
the output is already gamma-correct.
Results are now very close between L32 (old table, smoothstep) and S32
(contrast-only table, linstep).
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1885613002
Review URL: https://codereview.chromium.org/1885613002
/external/skia/src/gpu/text/GrDistanceFieldAdjustTable.cpp
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| e804292e805917002cc3d7baa7f967fb20d2c7cb |
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11-Dec-2015 |
joshualitt <joshualitt@chromium.org> |
Move all text stuff to its own folder
BUG=skia:
Review URL: https://codereview.chromium.org/1521453002
/external/skia/src/gpu/text/GrDistanceFieldAdjustTable.cpp
|