robertphillips@google.com | b83b6b4 | 2013-01-22 14:32:09 +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 Reed | 403d154 | 2016-09-26 18:51:24 -0400 | [diff] [blame] | 8 | #include "SkArithmeticModePriv.h" |
commit-bot@chromium.org | 8b0e8ac | 2014-01-30 18:58:24 +0000 | [diff] [blame] | 9 | #include "SkReadBuffer.h" |
mike@reedtribe.org | e51755f | 2011-12-10 19:36:56 +0000 | [diff] [blame] | 10 | |
Brian Salomon | 89cb821 | 2017-01-09 10:48:23 -0500 | [diff] [blame] | 11 | // This class only exists to unflatten instances that were serialized into old pictures as part of |
| 12 | // SkXfermodeImageFilter before the advent of SkBlendMode. Those image filters will now be |
| 13 | // transformed to SkArithmeticImageFilter which does not use this class in its implementation. |
mike@reedtribe.org | e51755f | 2011-12-10 19:36:56 +0000 | [diff] [blame] | 14 | class SkArithmeticMode_scalar : public SkXfermode { |
| 15 | public: |
reed | 8781123 | 2016-02-22 06:59:37 -0800 | [diff] [blame] | 16 | SkArithmeticMode_scalar(SkScalar k1, SkScalar k2, SkScalar k3, SkScalar k4, |
| 17 | bool enforcePMColor) { |
| 18 | fK[0] = k1; |
| 19 | fK[1] = k2; |
| 20 | fK[2] = k3; |
| 21 | fK[3] = k4; |
| 22 | fEnforcePMColor = enforcePMColor; |
mike@reedtribe.org | e51755f | 2011-12-10 19:36:56 +0000 | [diff] [blame] | 23 | } |
halcanary | 9d524f2 | 2016-03-29 09:03:52 -0700 | [diff] [blame] | 24 | |
Brian Salomon | 89cb821 | 2017-01-09 10:48:23 -0500 | [diff] [blame] | 25 | void xfer32(SkPMColor[], const SkPMColor[], int count, const SkAlpha[]) const override { |
| 26 | SkFAIL("This should never be called."); |
| 27 | } |
mike@reedtribe.org | e51755f | 2011-12-10 19:36:56 +0000 | [diff] [blame] | 28 | |
commit-bot@chromium.org | 0f10f7b | 2014-03-13 18:02:17 +0000 | [diff] [blame] | 29 | SK_TO_STRING_OVERRIDE() |
senorblanco@chromium.org | 9a6eb0e | 2013-05-29 20:55:09 +0000 | [diff] [blame] | 30 | SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkArithmeticMode_scalar) |
| 31 | |
Brian Salomon | 89cb821 | 2017-01-09 10:48:23 -0500 | [diff] [blame] | 32 | // This is used to extract the arithmetic params into an SkArithmeticImageFilter. Afterwards, |
| 33 | // this object is destroyed and arithemtic blending is implemented directly in the image filter. |
reed | 374772b | 2016-10-05 17:33:02 -0700 | [diff] [blame] | 34 | bool isArithmetic(SkArithmeticParams* params) const override { |
| 35 | if (params) { |
| 36 | memcpy(params->fK, fK, 4 * sizeof(float)); |
| 37 | params->fEnforcePMColor = fEnforcePMColor; |
| 38 | } |
| 39 | return true; |
| 40 | } |
| 41 | |
mike@reedtribe.org | e51755f | 2011-12-10 19:36:56 +0000 | [diff] [blame] | 42 | private: |
Brian Salomon | 89cb821 | 2017-01-09 10:48:23 -0500 | [diff] [blame] | 43 | void flatten(SkWriteBuffer& buffer) const override { SkFAIL("This shouild never be called."); } |
halcanary | 27a6e86 | 2016-01-21 14:15:10 -0800 | [diff] [blame] | 44 | |
mike@reedtribe.org | e51755f | 2011-12-10 19:36:56 +0000 | [diff] [blame] | 45 | SkScalar fK[4]; |
commit-bot@chromium.org | 51a11b7 | 2014-04-02 19:32:15 +0000 | [diff] [blame] | 46 | bool fEnforcePMColor; |
robertphillips@google.com | b83b6b4 | 2013-01-22 14:32:09 +0000 | [diff] [blame] | 47 | |
reed | 9fa60da | 2014-08-21 07:59:51 -0700 | [diff] [blame] | 48 | friend class SkArithmeticMode; |
| 49 | |
skia.committer@gmail.com | 98ded84 | 2013-01-23 07:06:17 +0000 | [diff] [blame] | 50 | typedef SkXfermode INHERITED; |
mike@reedtribe.org | e51755f | 2011-12-10 19:36:56 +0000 | [diff] [blame] | 51 | }; |
| 52 | |
reed | 60c9b58 | 2016-04-03 09:11:13 -0700 | [diff] [blame] | 53 | sk_sp<SkFlattenable> SkArithmeticMode_scalar::CreateProc(SkReadBuffer& buffer) { |
reed | 9fa60da | 2014-08-21 07:59:51 -0700 | [diff] [blame] | 54 | const SkScalar k1 = buffer.readScalar(); |
| 55 | const SkScalar k2 = buffer.readScalar(); |
| 56 | const SkScalar k3 = buffer.readScalar(); |
| 57 | const SkScalar k4 = buffer.readScalar(); |
| 58 | const bool enforcePMColor = buffer.readBool(); |
reed | 60c9b58 | 2016-04-03 09:11:13 -0700 | [diff] [blame] | 59 | return SkArithmeticMode::Make(k1, k2, k3, k4, enforcePMColor); |
reed | 9fa60da | 2014-08-21 07:59:51 -0700 | [diff] [blame] | 60 | } |
| 61 | |
commit-bot@chromium.org | 0f10f7b | 2014-03-13 18:02:17 +0000 | [diff] [blame] | 62 | #ifndef SK_IGNORE_TO_STRING |
robertphillips@google.com | b83b6b4 | 2013-01-22 14:32:09 +0000 | [diff] [blame] | 63 | void SkArithmeticMode_scalar::toString(SkString* str) const { |
Brian Salomon | 89cb821 | 2017-01-09 10:48:23 -0500 | [diff] [blame] | 64 | SkFAIL("This should never be called."); |
robertphillips@google.com | b83b6b4 | 2013-01-22 14:32:09 +0000 | [diff] [blame] | 65 | } |
| 66 | #endif |
mike@reedtribe.org | e51755f | 2011-12-10 19:36:56 +0000 | [diff] [blame] | 67 | |
| 68 | /////////////////////////////////////////////////////////////////////////////// |
| 69 | |
reed | cfb6bdf | 2016-03-29 11:32:50 -0700 | [diff] [blame] | 70 | sk_sp<SkXfermode> SkArithmeticMode::Make(SkScalar k1, SkScalar k2, SkScalar k3, SkScalar k4, |
| 71 | bool enforcePMColor) { |
reed | 8781123 | 2016-02-22 06:59:37 -0800 | [diff] [blame] | 72 | if (SkScalarNearlyZero(k1) && SkScalarNearlyEqual(k2, SK_Scalar1) && |
| 73 | SkScalarNearlyZero(k3) && SkScalarNearlyZero(k4)) { |
reed | cfb6bdf | 2016-03-29 11:32:50 -0700 | [diff] [blame] | 74 | return SkXfermode::Make(SkXfermode::kSrc_Mode); |
reed | 8781123 | 2016-02-22 06:59:37 -0800 | [diff] [blame] | 75 | } else if (SkScalarNearlyZero(k1) && SkScalarNearlyZero(k2) && |
| 76 | SkScalarNearlyEqual(k3, SK_Scalar1) && SkScalarNearlyZero(k4)) { |
reed | cfb6bdf | 2016-03-29 11:32:50 -0700 | [diff] [blame] | 77 | return SkXfermode::Make(SkXfermode::kDst_Mode); |
mike@reedtribe.org | e51755f | 2011-12-10 19:36:56 +0000 | [diff] [blame] | 78 | } |
reed | cfb6bdf | 2016-03-29 11:32:50 -0700 | [diff] [blame] | 79 | return sk_make_sp<SkArithmeticMode_scalar>(k1, k2, k3, k4, enforcePMColor); |
mike@reedtribe.org | e51755f | 2011-12-10 19:36:56 +0000 | [diff] [blame] | 80 | } |
senorblanco@chromium.org | 9a6eb0e | 2013-05-29 20:55:09 +0000 | [diff] [blame] | 81 | |
senorblanco@chromium.org | 9a6eb0e | 2013-05-29 20:55:09 +0000 | [diff] [blame] | 82 | SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkArithmeticMode) |
| 83 | SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkArithmeticMode_scalar) |
| 84 | SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END |