junov@chromium.org | f44fcdc | 2013-08-07 20:00:55 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2013 Google Inc. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | |
Mike Klein | c0bd9f9 | 2019-04-23 12:05:21 -0500 | [diff] [blame] | 8 | #include "include/effects/SkDropShadowImageFilter.h" |
junov@chromium.org | f44fcdc | 2013-08-07 20:00:55 +0000 | [diff] [blame] | 9 | |
Mike Klein | c0bd9f9 | 2019-04-23 12:05:21 -0500 | [diff] [blame] | 10 | #include "include/core/SkCanvas.h" |
| 11 | #include "include/effects/SkBlurImageFilter.h" |
Michael Ludwig | 8ee6cf3 | 2019-08-02 09:57:04 -0400 | [diff] [blame] | 12 | #include "src/core/SkImageFilter_Base.h" |
Mike Klein | c0bd9f9 | 2019-04-23 12:05:21 -0500 | [diff] [blame] | 13 | #include "src/core/SkReadBuffer.h" |
| 14 | #include "src/core/SkSpecialImage.h" |
| 15 | #include "src/core/SkSpecialSurface.h" |
| 16 | #include "src/core/SkWriteBuffer.h" |
junov@chromium.org | f44fcdc | 2013-08-07 20:00:55 +0000 | [diff] [blame] | 17 | |
Michael Ludwig | d668f7f | 2019-07-30 10:03:16 -0400 | [diff] [blame] | 18 | namespace { |
| 19 | |
Michael Ludwig | 8ee6cf3 | 2019-08-02 09:57:04 -0400 | [diff] [blame] | 20 | class SkDropShadowImageFilterImpl final : public SkImageFilter_Base { |
Michael Ludwig | d668f7f | 2019-07-30 10:03:16 -0400 | [diff] [blame] | 21 | public: |
Michael Ludwig | a00318f | 2019-08-01 09:30:33 -0400 | [diff] [blame] | 22 | SkDropShadowImageFilterImpl(SkScalar dx, SkScalar dy, SkScalar sigmaX, SkScalar sigmaY, |
| 23 | SkColor color, bool shadowOnly, sk_sp<SkImageFilter> input, |
| 24 | const CropRect* cropRect) |
| 25 | : INHERITED(&input, 1, cropRect) |
| 26 | , fDx(dx) |
| 27 | , fDy(dy) |
| 28 | , fSigmaX(sigmaX) |
| 29 | , fSigmaY(sigmaY) |
| 30 | , fColor(color) |
| 31 | , fShadowOnly(shadowOnly) {} |
Michael Ludwig | d668f7f | 2019-07-30 10:03:16 -0400 | [diff] [blame] | 32 | |
| 33 | SkRect computeFastBounds(const SkRect&) const override; |
| 34 | |
| 35 | protected: |
| 36 | void flatten(SkWriteBuffer&) const override; |
Michael Ludwig | e30a485 | 2019-08-14 14:35:42 -0400 | [diff] [blame] | 37 | sk_sp<SkSpecialImage> onFilterImage(const Context&, SkIPoint* offset) const override; |
Michael Ludwig | d668f7f | 2019-07-30 10:03:16 -0400 | [diff] [blame] | 38 | SkIRect onFilterNodeBounds(const SkIRect& src, const SkMatrix& ctm, |
| 39 | MapDirection, const SkIRect* inputRect) const override; |
| 40 | |
| 41 | private: |
| 42 | friend void SkDropShadowImageFilter::RegisterFlattenables(); |
| 43 | SK_FLATTENABLE_HOOKS(SkDropShadowImageFilterImpl) |
| 44 | |
Michael Ludwig | d668f7f | 2019-07-30 10:03:16 -0400 | [diff] [blame] | 45 | SkScalar fDx, fDy, fSigmaX, fSigmaY; |
Michael Ludwig | 245c002 | 2019-07-30 10:14:37 -0400 | [diff] [blame] | 46 | SkColor fColor; |
| 47 | bool fShadowOnly; |
Michael Ludwig | d668f7f | 2019-07-30 10:03:16 -0400 | [diff] [blame] | 48 | |
Michael Ludwig | 8ee6cf3 | 2019-08-02 09:57:04 -0400 | [diff] [blame] | 49 | typedef SkImageFilter_Base INHERITED; |
Michael Ludwig | d668f7f | 2019-07-30 10:03:16 -0400 | [diff] [blame] | 50 | }; |
| 51 | |
| 52 | } // end namespace |
| 53 | |
robertphillips | 225db44 | 2016-04-17 14:27:05 -0700 | [diff] [blame] | 54 | sk_sp<SkImageFilter> SkDropShadowImageFilter::Make(SkScalar dx, SkScalar dy, |
| 55 | SkScalar sigmaX, SkScalar sigmaY, |
| 56 | SkColor color, ShadowMode shadowMode, |
| 57 | sk_sp<SkImageFilter> input, |
Michael Ludwig | d668f7f | 2019-07-30 10:03:16 -0400 | [diff] [blame] | 58 | const SkImageFilter::CropRect* cropRect) { |
Michael Ludwig | 245c002 | 2019-07-30 10:14:37 -0400 | [diff] [blame] | 59 | bool shadowOnly = shadowMode == SkDropShadowImageFilter::kDrawShadowOnly_ShadowMode; |
Michael Ludwig | a00318f | 2019-08-01 09:30:33 -0400 | [diff] [blame] | 60 | return sk_sp<SkImageFilter>(new SkDropShadowImageFilterImpl( |
| 61 | dx, dy, sigmaX, sigmaY, color, shadowOnly, std::move(input), cropRect)); |
robertphillips | 225db44 | 2016-04-17 14:27:05 -0700 | [diff] [blame] | 62 | } |
| 63 | |
Michael Ludwig | d668f7f | 2019-07-30 10:03:16 -0400 | [diff] [blame] | 64 | void SkDropShadowImageFilter::RegisterFlattenables() { |
| 65 | SK_REGISTER_FLATTENABLE(SkDropShadowImageFilterImpl); |
| 66 | // TODO (michaelludwig) - Remove after grace period for SKPs to stop using old name |
| 67 | SkFlattenable::Register("SkDropShadowImageFilter", SkDropShadowImageFilterImpl::CreateProc); |
junov@chromium.org | f44fcdc | 2013-08-07 20:00:55 +0000 | [diff] [blame] | 68 | } |
| 69 | |
Michael Ludwig | d668f7f | 2019-07-30 10:03:16 -0400 | [diff] [blame] | 70 | /////////////////////////////////////////////////////////////////////////////////////////////////// |
| 71 | |
| 72 | sk_sp<SkFlattenable> SkDropShadowImageFilterImpl::CreateProc(SkReadBuffer& buffer) { |
reed | 9fa60da | 2014-08-21 07:59:51 -0700 | [diff] [blame] | 73 | SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1); |
| 74 | SkScalar dx = buffer.readScalar(); |
| 75 | SkScalar dy = buffer.readScalar(); |
| 76 | SkScalar sigmaX = buffer.readScalar(); |
| 77 | SkScalar sigmaY = buffer.readScalar(); |
| 78 | SkColor color = buffer.readColor(); |
Robert Phillips | a83d013 | 2018-01-24 14:46:38 -0500 | [diff] [blame] | 79 | |
Michael Ludwig | 245c002 | 2019-07-30 10:14:37 -0400 | [diff] [blame] | 80 | // For backwards compatibility, the shadow mode had been saved as an enum cast to a 32LE int, |
| 81 | // where shadow-and-foreground was 0 and shadow-only was 1. Other than the number of bits, this |
| 82 | // is equivalent to the bool that SkDropShadowImageFilterImpl now uses. |
| 83 | bool shadowOnly = SkToBool(buffer.read32LE(1)); |
Michael Ludwig | a00318f | 2019-08-01 09:30:33 -0400 | [diff] [blame] | 84 | // TODO (michaelludwig) - TODO: Call factory function once SkDropShadowImageFilter::Make no |
| 85 | // longer takes the old enum as its argument |
| 86 | return sk_sp<SkImageFilter>(new SkDropShadowImageFilterImpl( |
| 87 | dx, dy, sigmaX, sigmaY, color, shadowOnly, common.getInput(0), &common.cropRect())); |
reed | 9fa60da | 2014-08-21 07:59:51 -0700 | [diff] [blame] | 88 | } |
| 89 | |
Michael Ludwig | d668f7f | 2019-07-30 10:03:16 -0400 | [diff] [blame] | 90 | void SkDropShadowImageFilterImpl::flatten(SkWriteBuffer& buffer) const { |
junov@chromium.org | f44fcdc | 2013-08-07 20:00:55 +0000 | [diff] [blame] | 91 | this->INHERITED::flatten(buffer); |
| 92 | buffer.writeScalar(fDx); |
| 93 | buffer.writeScalar(fDy); |
rmistry@google.com | d6bab02 | 2013-12-02 13:50:38 +0000 | [diff] [blame] | 94 | buffer.writeScalar(fSigmaX); |
| 95 | buffer.writeScalar(fSigmaY); |
junov@chromium.org | f44fcdc | 2013-08-07 20:00:55 +0000 | [diff] [blame] | 96 | buffer.writeColor(fColor); |
Michael Ludwig | 245c002 | 2019-07-30 10:14:37 -0400 | [diff] [blame] | 97 | // See CreateProc, but we save the bool as an int to match previous enum serialization. |
| 98 | buffer.writeInt(fShadowOnly); |
junov@chromium.org | f44fcdc | 2013-08-07 20:00:55 +0000 | [diff] [blame] | 99 | } |
| 100 | |
Michael Ludwig | e30a485 | 2019-08-14 14:35:42 -0400 | [diff] [blame] | 101 | sk_sp<SkSpecialImage> SkDropShadowImageFilterImpl::onFilterImage(const Context& ctx, |
Michael Ludwig | d668f7f | 2019-07-30 10:03:16 -0400 | [diff] [blame] | 102 | SkIPoint* offset) const { |
robertphillips | 0a291c7 | 2016-03-23 05:00:01 -0700 | [diff] [blame] | 103 | SkIPoint inputOffset = SkIPoint::Make(0, 0); |
Michael Ludwig | e30a485 | 2019-08-14 14:35:42 -0400 | [diff] [blame] | 104 | sk_sp<SkSpecialImage> input(this->filterInput(0, ctx, &inputOffset)); |
robertphillips | 0a291c7 | 2016-03-23 05:00:01 -0700 | [diff] [blame] | 105 | if (!input) { |
| 106 | return nullptr; |
| 107 | } |
junov@chromium.org | f44fcdc | 2013-08-07 20:00:55 +0000 | [diff] [blame] | 108 | |
robertphillips | 0a291c7 | 2016-03-23 05:00:01 -0700 | [diff] [blame] | 109 | const SkIRect inputBounds = SkIRect::MakeXYWH(inputOffset.x(), inputOffset.y(), |
| 110 | input->width(), input->height()); |
rmistry@google.com | d6bab02 | 2013-12-02 13:50:38 +0000 | [diff] [blame] | 111 | SkIRect bounds; |
robertphillips | 0a291c7 | 2016-03-23 05:00:01 -0700 | [diff] [blame] | 112 | if (!this->applyCropRect(ctx, inputBounds, &bounds)) { |
| 113 | return nullptr; |
rmistry@google.com | d6bab02 | 2013-12-02 13:50:38 +0000 | [diff] [blame] | 114 | } |
| 115 | |
Michael Ludwig | e30a485 | 2019-08-14 14:35:42 -0400 | [diff] [blame] | 116 | sk_sp<SkSpecialSurface> surf(ctx.makeSurface(bounds.size())); |
robertphillips | 0a291c7 | 2016-03-23 05:00:01 -0700 | [diff] [blame] | 117 | if (!surf) { |
| 118 | return nullptr; |
commit-bot@chromium.org | cd3b15c | 2013-12-04 17:06:49 +0000 | [diff] [blame] | 119 | } |
robertphillips | 0a291c7 | 2016-03-23 05:00:01 -0700 | [diff] [blame] | 120 | |
| 121 | SkCanvas* canvas = surf->getCanvas(); |
| 122 | SkASSERT(canvas); |
| 123 | |
| 124 | canvas->clear(0x0); |
junov@chromium.org | f44fcdc | 2013-08-07 20:00:55 +0000 | [diff] [blame] | 125 | |
senorblanco@chromium.org | ba31f1d | 2014-05-07 20:56:08 +0000 | [diff] [blame] | 126 | SkVector sigma = SkVector::Make(fSigmaX, fSigmaY); |
| 127 | ctx.ctm().mapVectors(&sigma, 1); |
Anthony Catel | b79f1b5 | 2019-12-10 22:29:38 +0100 | [diff] [blame] | 128 | sigma.fX = SkScalarAbs(sigma.fX); |
| 129 | sigma.fY = SkScalarAbs(sigma.fY); |
robertphillips | 0a291c7 | 2016-03-23 05:00:01 -0700 | [diff] [blame] | 130 | |
junov@chromium.org | f44fcdc | 2013-08-07 20:00:55 +0000 | [diff] [blame] | 131 | SkPaint paint; |
Robert Phillips | 92a895e | 2016-12-09 14:39:35 +0000 | [diff] [blame] | 132 | paint.setAntiAlias(true); |
robertphillips | 6e7025a | 2016-04-04 04:31:25 -0700 | [diff] [blame] | 133 | paint.setImageFilter(SkBlurImageFilter::Make(sigma.fX, sigma.fY, nullptr)); |
Mike Reed | b286bc2 | 2019-04-08 16:23:20 -0400 | [diff] [blame] | 134 | paint.setColorFilter(SkColorFilters::Blend(fColor, SkBlendMode::kSrcIn)); |
robertphillips | 0a291c7 | 2016-03-23 05:00:01 -0700 | [diff] [blame] | 135 | |
senorblanco@chromium.org | ba31f1d | 2014-05-07 20:56:08 +0000 | [diff] [blame] | 136 | SkVector offsetVec = SkVector::Make(fDx, fDy); |
| 137 | ctx.ctm().mapVectors(&offsetVec, 1); |
robertphillips | 0a291c7 | 2016-03-23 05:00:01 -0700 | [diff] [blame] | 138 | |
Michael Ludwig | e6c3f9f | 2020-02-20 14:00:46 -0500 | [diff] [blame^] | 139 | canvas->translate(SkIntToScalar(inputOffset.fX) - SkIntToScalar(bounds.fLeft), |
| 140 | SkIntToScalar(inputOffset.fY) - SkIntToScalar(bounds.fTop)); |
robertphillips | 0a291c7 | 2016-03-23 05:00:01 -0700 | [diff] [blame] | 141 | input->draw(canvas, offsetVec.fX, offsetVec.fY, &paint); |
| 142 | |
Michael Ludwig | 245c002 | 2019-07-30 10:14:37 -0400 | [diff] [blame] | 143 | if (!fShadowOnly) { |
robertphillips | 0a291c7 | 2016-03-23 05:00:01 -0700 | [diff] [blame] | 144 | input->draw(canvas, 0, 0, nullptr); |
sugoi | 234f036 | 2014-10-23 13:59:52 -0700 | [diff] [blame] | 145 | } |
senorblanco@chromium.org | 6776b82 | 2014-01-03 21:48:22 +0000 | [diff] [blame] | 146 | offset->fX = bounds.fLeft; |
| 147 | offset->fY = bounds.fTop; |
robertphillips | 2302de9 | 2016-03-24 07:26:32 -0700 | [diff] [blame] | 148 | return surf->makeImageSnapshot(); |
junov@chromium.org | f44fcdc | 2013-08-07 20:00:55 +0000 | [diff] [blame] | 149 | } |
senorblanco@chromium.org | 336d1d7 | 2014-01-27 21:03:17 +0000 | [diff] [blame] | 150 | |
Michael Ludwig | d668f7f | 2019-07-30 10:03:16 -0400 | [diff] [blame] | 151 | SkRect SkDropShadowImageFilterImpl::computeFastBounds(const SkRect& src) const { |
senorblanco | e5e7984 | 2016-03-21 14:51:59 -0700 | [diff] [blame] | 152 | SkRect bounds = this->getInput(0) ? this->getInput(0)->computeFastBounds(src) : src; |
| 153 | SkRect shadowBounds = bounds; |
senorblanco@chromium.org | 336d1d7 | 2014-01-27 21:03:17 +0000 | [diff] [blame] | 154 | shadowBounds.offset(fDx, fDy); |
Mike Reed | 8be952a | 2017-02-13 20:44:33 -0500 | [diff] [blame] | 155 | shadowBounds.outset(fSigmaX * 3, fSigmaY * 3); |
Michael Ludwig | 245c002 | 2019-07-30 10:14:37 -0400 | [diff] [blame] | 156 | if (!fShadowOnly) { |
senorblanco | e5e7984 | 2016-03-21 14:51:59 -0700 | [diff] [blame] | 157 | bounds.join(shadowBounds); |
sugoi | 234f036 | 2014-10-23 13:59:52 -0700 | [diff] [blame] | 158 | } else { |
senorblanco | e5e7984 | 2016-03-21 14:51:59 -0700 | [diff] [blame] | 159 | bounds = shadowBounds; |
sugoi | 234f036 | 2014-10-23 13:59:52 -0700 | [diff] [blame] | 160 | } |
senorblanco | e5e7984 | 2016-03-21 14:51:59 -0700 | [diff] [blame] | 161 | return bounds; |
senorblanco@chromium.org | 336d1d7 | 2014-01-27 21:03:17 +0000 | [diff] [blame] | 162 | } |
senorblanco@chromium.org | c4b12f1 | 2014-02-05 17:51:22 +0000 | [diff] [blame] | 163 | |
Michael Ludwig | d668f7f | 2019-07-30 10:03:16 -0400 | [diff] [blame] | 164 | SkIRect SkDropShadowImageFilterImpl::onFilterNodeBounds( |
| 165 | const SkIRect& src, const SkMatrix& ctm, MapDirection dir, const SkIRect* inputRect) const { |
senorblanco@chromium.org | ba31f1d | 2014-05-07 20:56:08 +0000 | [diff] [blame] | 166 | SkVector offsetVec = SkVector::Make(fDx, fDy); |
Robert Phillips | 1207843 | 2018-05-17 11:17:39 -0400 | [diff] [blame] | 167 | if (kReverse_MapDirection == dir) { |
senorblanco | db64af3 | 2015-12-09 10:11:43 -0800 | [diff] [blame] | 168 | offsetVec.negate(); |
| 169 | } |
senorblanco@chromium.org | ba31f1d | 2014-05-07 20:56:08 +0000 | [diff] [blame] | 170 | ctm.mapVectors(&offsetVec, 1); |
senorblanco | e5e7984 | 2016-03-21 14:51:59 -0700 | [diff] [blame] | 171 | SkIRect dst = src.makeOffset(SkScalarCeilToInt(offsetVec.x()), |
| 172 | SkScalarCeilToInt(offsetVec.y())); |
senorblanco@chromium.org | ba31f1d | 2014-05-07 20:56:08 +0000 | [diff] [blame] | 173 | SkVector sigma = SkVector::Make(fSigmaX, fSigmaY); |
| 174 | ctm.mapVectors(&sigma, 1); |
jbroman | 203a993 | 2016-07-11 14:07:59 -0700 | [diff] [blame] | 175 | dst.outset( |
Mike Reed | 8be952a | 2017-02-13 20:44:33 -0500 | [diff] [blame] | 176 | SkScalarCeilToInt(SkScalarAbs(sigma.x() * 3)), |
| 177 | SkScalarCeilToInt(SkScalarAbs(sigma.y() * 3))); |
Michael Ludwig | 245c002 | 2019-07-30 10:14:37 -0400 | [diff] [blame] | 178 | if (!fShadowOnly) { |
senorblanco | e5e7984 | 2016-03-21 14:51:59 -0700 | [diff] [blame] | 179 | dst.join(src); |
sugoi | 234f036 | 2014-10-23 13:59:52 -0700 | [diff] [blame] | 180 | } |
senorblanco | e5e7984 | 2016-03-21 14:51:59 -0700 | [diff] [blame] | 181 | return dst; |
senorblanco@chromium.org | c4b12f1 | 2014-02-05 17:51:22 +0000 | [diff] [blame] | 182 | } |
robertphillips | f3f5bad | 2014-12-19 13:49:15 -0800 | [diff] [blame] | 183 | |