epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2006 The Android Open Source Project |
| 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 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 8 | #include "SkEmbossMaskFilter.h" |
| 9 | #include "SkBlurMaskFilter.h" |
| 10 | #include "SkBlurMask.h" |
Mike Reed | e602f39 | 2018-02-06 10:17:08 -0500 | [diff] [blame^] | 11 | #include "SkColorPriv.h" |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 12 | #include "SkEmbossMask.h" |
commit-bot@chromium.org | 8b0e8ac | 2014-01-30 18:58:24 +0000 | [diff] [blame] | 13 | #include "SkReadBuffer.h" |
| 14 | #include "SkWriteBuffer.h" |
robertphillips@google.com | 0bd80fa | 2013-03-18 17:53:38 +0000 | [diff] [blame] | 15 | #include "SkString.h" |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 16 | |
reed | efdfd51 | 2016-04-04 10:02:58 -0700 | [diff] [blame] | 17 | sk_sp<SkMaskFilter> SkEmbossMaskFilter::Make(SkScalar blurSigma, const Light& light) { |
| 18 | return sk_sp<SkMaskFilter>(new SkEmbossMaskFilter(blurSigma, light)); |
reed@google.com | daaafa6 | 2014-04-29 15:20:16 +0000 | [diff] [blame] | 19 | } |
| 20 | |
Brian Osman | 3e31e99 | 2017-11-14 16:16:39 +0000 | [diff] [blame] | 21 | #ifdef SK_SUPPORT_LEGACY_EMBOSSMASKFILTER |
| 22 | sk_sp<SkMaskFilter> SkBlurMaskFilter::MakeEmboss(SkScalar blurSigma, const SkScalar direction[3], |
| 23 | SkScalar ambient, SkScalar specular) { |
| 24 | if (direction == nullptr) { |
| 25 | return nullptr; |
| 26 | } |
| 27 | |
| 28 | SkEmbossMaskFilter::Light light; |
| 29 | |
| 30 | memcpy(light.fDirection, direction, sizeof(light.fDirection)); |
| 31 | // ambient should be 0...1 as a scalar |
| 32 | light.fAmbient = SkUnitScalarClampToByte(ambient); |
| 33 | // specular should be 0..15.99 as a scalar |
| 34 | static const SkScalar kSpecularMultiplier = SkIntToScalar(255) / 16; |
| 35 | light.fSpecular = static_cast<U8CPU>(SkScalarPin(specular, 0, 16) * kSpecularMultiplier + 0.5); |
| 36 | |
| 37 | return SkEmbossMaskFilter::Make(blurSigma, light); |
| 38 | } |
| 39 | #endif |
| 40 | |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 41 | /////////////////////////////////////////////////////////////////////////////// |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 42 | |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 43 | static void normalize(SkScalar v[3]) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 44 | SkScalar mag = SkScalarSquare(v[0]) + SkScalarSquare(v[1]) + SkScalarSquare(v[2]); |
| 45 | mag = SkScalarSqrt(mag); |
| 46 | |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 47 | for (int i = 0; i < 3; i++) { |
reed | 80ea19c | 2015-05-12 10:37:34 -0700 | [diff] [blame] | 48 | v[i] /= mag; |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 49 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 50 | } |
| 51 | |
robertphillips@google.com | 7ce661d | 2013-08-27 16:14:03 +0000 | [diff] [blame] | 52 | SkEmbossMaskFilter::SkEmbossMaskFilter(SkScalar blurSigma, const Light& light) |
robertphillips@google.com | b75233b | 2013-08-27 16:31:31 +0000 | [diff] [blame] | 53 | : fLight(light), fBlurSigma(blurSigma) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 54 | normalize(fLight.fDirection); |
| 55 | } |
| 56 | |
reed@google.com | 30711b7 | 2012-12-18 19:18:39 +0000 | [diff] [blame] | 57 | SkMask::Format SkEmbossMaskFilter::getFormat() const { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 58 | return SkMask::k3D_Format; |
| 59 | } |
| 60 | |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 61 | bool SkEmbossMaskFilter::filterMask(SkMask* dst, const SkMask& src, |
robertphillips@google.com | 7ce661d | 2013-08-27 16:14:03 +0000 | [diff] [blame] | 62 | const SkMatrix& matrix, SkIPoint* margin) const { |
| 63 | SkScalar sigma = matrix.mapRadius(fBlurSigma); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 64 | |
commit-bot@chromium.org | e396455 | 2014-04-28 16:25:35 +0000 | [diff] [blame] | 65 | if (!SkBlurMask::BoxBlur(dst, src, sigma, kInner_SkBlurStyle, kLow_SkBlurQuality)) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 66 | return false; |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 67 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 68 | |
| 69 | dst->fFormat = SkMask::k3D_Format; |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 70 | if (margin) { |
reed@google.com | e1ca705 | 2013-12-17 19:22:07 +0000 | [diff] [blame] | 71 | margin->set(SkScalarCeilToInt(3*sigma), SkScalarCeilToInt(3*sigma)); |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 72 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 73 | |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 74 | if (src.fImage == nullptr) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 75 | return true; |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 76 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 77 | |
| 78 | // create a larger buffer for the other two channels (should force fBlur to do this for us) |
| 79 | |
| 80 | { |
| 81 | uint8_t* alphaPlane = dst->fImage; |
| 82 | size_t planeSize = dst->computeImageSize(); |
reed@android.com | 543ed93 | 2009-04-24 12:43:40 +0000 | [diff] [blame] | 83 | if (0 == planeSize) { |
| 84 | return false; // too big to allocate, abort |
| 85 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 86 | dst->fImage = SkMask::AllocImage(planeSize * 3); |
| 87 | memcpy(dst->fImage, alphaPlane, planeSize); |
| 88 | SkMask::FreeImage(alphaPlane); |
| 89 | } |
| 90 | |
| 91 | // run the light direction through the matrix... |
| 92 | Light light = fLight; |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 93 | matrix.mapVectors((SkVector*)(void*)light.fDirection, |
| 94 | (SkVector*)(void*)fLight.fDirection, 1); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 95 | |
| 96 | // now restore the length of the XY component |
| 97 | // cast to SkVector so we can call setLength (this double cast silences alias warnings) |
| 98 | SkVector* vec = (SkVector*)(void*)light.fDirection; |
| 99 | vec->setLength(light.fDirection[0], |
| 100 | light.fDirection[1], |
| 101 | SkPoint::Length(fLight.fDirection[0], fLight.fDirection[1])); |
| 102 | |
| 103 | SkEmbossMask::Emboss(dst, light); |
| 104 | |
| 105 | // restore original alpha |
| 106 | memcpy(dst->fImage, src.fImage, src.computeImageSize()); |
| 107 | |
| 108 | return true; |
| 109 | } |
| 110 | |
reed | 60c9b58 | 2016-04-03 09:11:13 -0700 | [diff] [blame] | 111 | sk_sp<SkFlattenable> SkEmbossMaskFilter::CreateProc(SkReadBuffer& buffer) { |
reed | 9fa60da | 2014-08-21 07:59:51 -0700 | [diff] [blame] | 112 | Light light; |
| 113 | if (buffer.readByteArray(&light, sizeof(Light))) { |
| 114 | light.fPad = 0; // for the font-cache lookup to be clean |
| 115 | const SkScalar sigma = buffer.readScalar(); |
reed | efdfd51 | 2016-04-04 10:02:58 -0700 | [diff] [blame] | 116 | return Make(sigma, light); |
reed | 9fa60da | 2014-08-21 07:59:51 -0700 | [diff] [blame] | 117 | } |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 118 | return nullptr; |
reed | 9fa60da | 2014-08-21 07:59:51 -0700 | [diff] [blame] | 119 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 120 | |
commit-bot@chromium.org | 8b0e8ac | 2014-01-30 18:58:24 +0000 | [diff] [blame] | 121 | void SkEmbossMaskFilter::flatten(SkWriteBuffer& buffer) const { |
djsollen@google.com | 5492424 | 2012-03-29 15:18:04 +0000 | [diff] [blame] | 122 | Light tmpLight = fLight; |
| 123 | tmpLight.fPad = 0; // for the font-cache lookup to be clean |
djsollen@google.com | c73dd5c | 2012-08-07 15:54:32 +0000 | [diff] [blame] | 124 | buffer.writeByteArray(&tmpLight, sizeof(tmpLight)); |
robertphillips@google.com | 11e0555 | 2013-12-03 19:46:58 +0000 | [diff] [blame] | 125 | buffer.writeScalar(fBlurSigma); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 126 | } |
robertphillips@google.com | 0bd80fa | 2013-03-18 17:53:38 +0000 | [diff] [blame] | 127 | |
commit-bot@chromium.org | 0f10f7b | 2014-03-13 18:02:17 +0000 | [diff] [blame] | 128 | #ifndef SK_IGNORE_TO_STRING |
robertphillips@google.com | 0bd80fa | 2013-03-18 17:53:38 +0000 | [diff] [blame] | 129 | void SkEmbossMaskFilter::toString(SkString* str) const { |
| 130 | str->append("SkEmbossMaskFilter: ("); |
| 131 | |
| 132 | str->append("direction: ("); |
| 133 | str->appendScalar(fLight.fDirection[0]); |
| 134 | str->append(", "); |
| 135 | str->appendScalar(fLight.fDirection[1]); |
| 136 | str->append(", "); |
| 137 | str->appendScalar(fLight.fDirection[2]); |
| 138 | str->append(") "); |
| 139 | |
skia.committer@gmail.com | 8eaddb0 | 2013-03-19 07:15:10 +0000 | [diff] [blame] | 140 | str->appendf("ambient: %d specular: %d ", |
robertphillips@google.com | 0bd80fa | 2013-03-18 17:53:38 +0000 | [diff] [blame] | 141 | fLight.fAmbient, fLight.fSpecular); |
| 142 | |
robertphillips@google.com | 7ce661d | 2013-08-27 16:14:03 +0000 | [diff] [blame] | 143 | str->append("blurSigma: "); |
| 144 | str->appendScalar(fBlurSigma); |
robertphillips@google.com | 0bd80fa | 2013-03-18 17:53:38 +0000 | [diff] [blame] | 145 | str->append(")"); |
| 146 | } |
| 147 | #endif |