diff options
| author |  Mike Reed <reed@google.com> | 2018-03-05 16:56:52 -0500 |
|---|---|---|
| committer |  Skia Commit-Bot <skia-commit-bot@chromium.org> | 2018-03-06 15:12:16 +0000 |
| commit | 28d47731a1488009eed98c3ddfff2df2c95753c8 (patch) | |
| tree | 8a7ac87f37f5df95ba67bb78c50a00891ae066b1 /src/core | |
| parent | 0c4b7b1f2f1dd37204d401a6993119e5431942a6 (diff) | |
make compute helper for blurs private
Precursor for moving blurmaskfilter into core, since it is referenced
by core code for drawShadow.
Bug: skia:
Change-Id: I900c6e10523115c75f45d2c410eb6a5ca56a6e4d
Reviewed-on: https://skia-review.googlesource.com/112301
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Mike Reed <reed@google.com>
Diffstat (limited to 'src/core')
| -rw-r--r-- | src/core/SkBlurPriv.h | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/src/core/SkBlurPriv.h b/src/core/SkBlurPriv.h new file mode 100644 index 0000000000..d7a5c05b96 --- /dev/null +++ b/src/core/SkBlurPriv.h @@ -0,0 +1,37 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkBlurPriv_DEFINED +#define SkBlurPriv_DEFINED + +#include "SkRRect.h" +#include "SkSize.h" + +static const int kSkBlurRRectMaxDivisions = 6; + +// This method computes all the parameters for drawing a partially occluded nine-patched +// blurred rrect mask: +// rrectToDraw - the integerized rrect to draw in the mask +// widthHeight - how large to make the mask (rrectToDraw will be centered in this coord sys) +// rectXs, rectYs - the x & y coordinates of the covering geometry lattice +// texXs, texYs - the texture coordinate at each point in rectXs & rectYs +// numXs, numYs - number of coordinates in the x & y directions +// skipMask - bit mask that contains a 1-bit whenever one of the cells is occluded +// It returns true if 'devRRect' is nine-patchable +bool SkComputeBlurredRRectParams(const SkRRect& srcRRect, const SkRRect& devRRect, + const SkRect& occluder, + SkScalar sigma, SkScalar xformedSigma, + SkRRect* rrectToDraw, + SkISize* widthHeight, + SkScalar rectXs[kSkBlurRRectMaxDivisions], + SkScalar rectYs[kSkBlurRRectMaxDivisions], + SkScalar texXs[kSkBlurRRectMaxDivisions], + SkScalar texYs[kSkBlurRRectMaxDivisions], + int* numXs, int* numYs, uint32_t* skipMask); + + +#endif |