diff options
| author |  ethannicholas <ethannicholas@google.com> | 2016-09-26 13:43:47 -0700 |
|---|---|---|
| committer |  Commit bot <commit-bot@chromium.org> | 2016-09-26 13:43:47 -0700 |
| commit | 29111a3e71f59b26c1feebf6b30db5c68a27d5a9 (patch) | |
| tree | f0adeb3061610aed50cff350f528d0a952f63c0a /src/sksl/README | |
| parent | 2cc7f8d196793a8a7f8d50b104f733f9a476788c (diff) | |
Revert of Turned on SkSL->GLSL compiler (patchset #37 id:800001 of https://codereview.chromium.org/2288033003/ )
Reason for revert:
Gold image breakage
Original issue's description:
> Turned on SkSL->GLSL compiler
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2288033003
>
> Committed: https://skia.googlesource.com/skia/+/9b0fe3d125f237d9884732a48414fa85fc71b4e3
> Committed: https://skia.googlesource.com/skia/+/b12b3c6908c62c908b3680be01e3b5bfd30de310
TBR=benjaminwagner@google.com,bsalomon@google.com,egdaniel@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
Review-Url: https://codereview.chromium.org/2372773002
Diffstat (limited to 'src/sksl/README')
| -rw-r--r-- | src/sksl/README | 35 |
1 files changed, 0 insertions, 35 deletions
diff --git a/src/sksl/README b/src/sksl/README deleted file mode 100644 index 1427c21926..0000000000 --- a/src/sksl/README +++ /dev/null @@ -1,35 +0,0 @@ -Overview -======== - -SkSL ("Skia Shading Language") is a variant of GLSL which is used as Skia's -internal shading language. SkSL is, at its heart, a single standardized version -of GLSL which avoids all of the various version and dialect differences found -in GLSL "in the wild", but it does bring a few of its own changes to the table. - -Skia uses the SkSL compiler to convert SkSL code to GLSL, GLSL ES, or SPIR-V -before handing it over to the graphics driver. - -Differences from GLSL -===================== - -SkSL is based on GLSL 4.5. For the most part, write SkSL exactly as you would -desktop GLSL, and the SkSL compiler will take care of version and dialect -differences (for instance, you always use "in" and "out", and skslc will handle -translating them to "varying" and "attribute" as appropriate). Be aware of the -following differences between SkSL and GLSL: - -* no #version or "precision" statement is required, and they will be ignored if - present -* the output color is sk_FragColor (do not declare it) -* lowp, mediump, and highp are always permitted (but will only be respected if - you run on a GLES device) -* you do not need to include ".0" to make a number a float (meaning that - "vec2(x, y) * 4" is perfectly legal in SkSL, unlike GLSL where it would often - have to be expressed "vec2(x, y) * 4.0". There is no performance penalty for - this, as the number is converted to a float at compile time) -* type suffixes on numbers (1.0f, 0xFFu) are both unnecessary and unsupported -* some built-in functions and one or two rarely-used language features are not - yet supported (sorry!) - -SkSL is still under development, and is expected to diverge further from GLSL -over time. |