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| author |  fmalita <fmalita@chromium.org> | 2015-12-15 06:48:48 -0800 |
|---|---|---|
| committer |  Commit bot <commit-bot@chromium.org> | 2015-12-15 06:48:48 -0800 |
| commit | aed4d32de937a8f2733924eb848cc287e8d04087 (patch) | |
| tree | 0c7708b50a7459708dc3f9a9613b6900a292d3b5 /src/core/SkBitmapProcState.cpp | |
| parent | 11f457e1627be775cfa26d71307dbd6073f9269c (diff) | |
SkBitmapProcState rounding bias
Epsilon bias to keep bitmap sample rounding consistent with geometry
rounding.
Also update the GM to draw an outer border + drop uninteresting
scales in favor of negative scale variants.
BUG=skia:4680,skia:4649
R=reed@google.com,caryclark@google.com,mtklein@google.com
Review URL: https://codereview.chromium.org/1527633002
Diffstat (limited to 'src/core/SkBitmapProcState.cpp')
| -rw-r--r-- | src/core/SkBitmapProcState.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/core/SkBitmapProcState.cpp b/src/core/SkBitmapProcState.cpp index 5ec6721436..487bd80402 100644 --- a/src/core/SkBitmapProcState.cpp +++ b/src/core/SkBitmapProcState.cpp @@ -823,10 +823,12 @@ void Clamp_S32_opaque_D32_nofilter_DX_shaderproc(const SkBitmapProcState& s, in SkPoint pt; s.fInvProc(s.fInvMatrix, SkIntToScalar(x) + SK_ScalarHalf, SkIntToScalar(y) + SK_ScalarHalf, &pt); - fx = SkScalarToFractionalInt(pt.fY); + fx = SkScalarToFractionalInt(pt.fY) + + bitmap_sampler_inv_bias(s.fInvMatrix.getScaleY()); const unsigned maxY = s.fPixmap.height() - 1; dstY = SkClampMax(SkFractionalIntToInt(fx), maxY); - fx = SkScalarToFractionalInt(pt.fX); + fx = SkScalarToFractionalInt(pt.fX) + + bitmap_sampler_inv_bias(s.fInvMatrix.getScaleX()); } const SkPMColor* SK_RESTRICT src = s.fPixmap.addr32(0, dstY); |