From 28d47731a1488009eed98c3ddfff2df2c95753c8 Mon Sep 17 00:00:00 2001 From: Mike Reed Date: Mon, 5 Mar 2018 16:56:52 -0500 Subject: 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 Commit-Queue: Mike Reed --- src/core/SkBlurPriv.h | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 src/core/SkBlurPriv.h (limited to 'src/core') 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 -- cgit v1.2.3