1 /* 2 * Copyright (c) 2023-2023 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 #ifndef RENDER_SERVICE_CLIENT_CORE_RENDER_RS_KAWASE_BLUR_H 16 #define RENDER_SERVICE_CLIENT_CORE_RENDER_RS_KAWASE_BLUR_H 17 18 #include "include/core/SkCanvas.h" 19 #include "include/core/SkData.h" 20 #include "include/core/SkPaint.h" 21 #include "include/core/SkSize.h" 22 #include "include/core/SkString.h" 23 #include "include/core/SkSurface.h" 24 #ifdef NEW_SKIA 25 #include "include/effects/SkRuntimeEffect.h" 26 #endif 27 #include "tools/Resources.h" 28 29 namespace OHOS { 30 namespace Rosen { 31 #ifndef USE_ROSEN_DRAWING 32 struct KawaseParameter { 33 SkRect src; 34 SkRect dst; 35 int radius; 36 sk_sp<SkColorFilter> colorFilter; 37 float alpha; 38 39 KawaseParameter(const SkRect& s, const SkRect& d, int r, sk_sp<SkColorFilter> color = nullptr, float a = 0.f) srcKawaseParameter40 : src(s), dst(d), radius(r), colorFilter(color), alpha(a) {} 41 }; 42 class KawaseBlurFilter { 43 public: 44 explicit KawaseBlurFilter(); 45 ~KawaseBlurFilter(); 46 bool ApplyKawaseBlur(SkCanvas& canvas, const sk_sp<SkImage>& image, const KawaseParameter& param); 47 48 private: 49 static SkMatrix GetShaderTransform(const SkCanvas* canvas, const SkRect& blurRect, float scale = 1.0f); 50 bool ApplyBlur(SkCanvas& canvas, const sk_sp<SkImage>& image, const sk_sp<SkImage>& blurImage, 51 const KawaseParameter& param) const; 52 void ComputeRadiusAndScale(int radius); 53 void AdjustRadiusAndScale(); 54 std::string GetDescription() const; 55 56 static constexpr float baseBlurScale = 0.5f; // base downSample radio 57 static constexpr uint32_t kMaxPasses = 4; // Maximum number of render passes 58 static constexpr uint32_t kMaxPassesLargeRadius = 7; 59 static constexpr float kDilatedConvolution = 2.0f; 60 static constexpr float kDilatedConvolutionLargeRadius = 4.6f; 61 // To avoid downscaling artifacts, interpolate the blurred fbo with the full composited image, up to this radius 62 static constexpr float kMaxCrossFadeRadius = 10.0f; 63 static constexpr bool supportLargeRadius = true; 64 65 #ifdef NEW_SKIA 66 sk_sp<SkRuntimeEffect> blurEffect_; 67 sk_sp<SkRuntimeEffect> mixEffect_; 68 #endif 69 float blurRadius_ = 0.f; 70 float blurScale_ = 0.25f; 71 }; 72 #endif 73 } // namespace Rosen 74 } // namespace OHOS 75 #endif // RENDER_SERVICE_CLIENT_CORE_RENDER_RS_KAWASE_BLUR_H 76