943108b0b2
SkSL language features that are origin sensitive now use a uniform to conditionally flip their result rather than generating different code. Previously we would insert a "rt height" uniform if sk_FragCoord needed to be flipped. sk_FragCoord,y was implemented as "realFragCoord.y" or "rtHeight - realFragCoord.y" depending on SkSL::ProgramSettings::fFlipY. Now we instead use a two component vector rtFlip and sk_FragCoord.y is always "rtFlip.x + rtFlip.y*realFragCoord.y". We configure rtFlip as either (0, 1) or (rtHeight, -1). sk_Clockwise and dFdy simiarly use rtFlip.y to emit code that always works with either origin. Bug: skia:12037 Change-Id: I7a09d0caac60a58d72b76645ff31bcabde4086b6 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/414796 Commit-Queue: Brian Salomon <bsalomon@google.com> Reviewed-by: Greg Daniel <egdaniel@google.com> Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
2 lines
58 B
Plaintext
2 lines
58 B
Plaintext
void main() { sk_FragColor.xy = half2(sk_FragCoord.xy); }
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