1 /* 2 * Copyright 2018 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 8 /************************************************************************************************** 9 *** This file was autogenerated from GrRectBlurEffect.fp; do not modify. 10 **************************************************************************************************/ 11 #ifndef GrRectBlurEffect_DEFINED 12 #define GrRectBlurEffect_DEFINED 13 #include "SkTypes.h" 14 #if SK_SUPPORT_GPU 15 16 #include "GrProxyProvider.h" 17 #include "../effects/SkBlurMask.h" 18 #include "GrFragmentProcessor.h" 19 #include "GrCoordTransform.h" 20 class GrRectBlurEffect : public GrFragmentProcessor { 21 public: CreateBlurProfileTexture(GrProxyProvider * proxyProvider,float sigma)22 static sk_sp<GrTextureProxy> CreateBlurProfileTexture(GrProxyProvider* proxyProvider, 23 float sigma) { 24 unsigned int profileSize = SkScalarCeilToInt(6 * sigma); 25 26 static const GrUniqueKey::Domain kDomain = GrUniqueKey::GenerateDomain(); 27 GrUniqueKey key; 28 GrUniqueKey::Builder builder(&key, kDomain, 1); 29 builder[0] = profileSize; 30 builder.finish(); 31 32 sk_sp<GrTextureProxy> blurProfile( 33 proxyProvider->findOrCreateProxyByUniqueKey(key, kTopLeft_GrSurfaceOrigin)); 34 if (!blurProfile) { 35 GrSurfaceDesc texDesc; 36 texDesc.fOrigin = kTopLeft_GrSurfaceOrigin; 37 texDesc.fWidth = profileSize; 38 texDesc.fHeight = 1; 39 texDesc.fConfig = kAlpha_8_GrPixelConfig; 40 41 std::unique_ptr<uint8_t[]> profile(SkBlurMask::ComputeBlurProfile(sigma)); 42 43 blurProfile = 44 proxyProvider->createTextureProxy(texDesc, SkBudgeted::kYes, profile.get(), 0); 45 if (!blurProfile) { 46 return nullptr; 47 } 48 49 SkASSERT(blurProfile->origin() == kTopLeft_GrSurfaceOrigin); 50 proxyProvider->assignUniqueKeyToProxy(key, blurProfile.get()); 51 } 52 53 return blurProfile; 54 } rect()55 SkRect rect() const { return fRect; } sigma()56 float sigma() const { return fSigma; } 57 Make(GrProxyProvider * proxyProvider,const SkRect & rect,float sigma)58 static std::unique_ptr<GrFragmentProcessor> Make(GrProxyProvider* proxyProvider, 59 const SkRect& rect, float sigma) { 60 int doubleProfileSize = SkScalarCeilToInt(12 * sigma); 61 62 if (doubleProfileSize >= rect.width() || doubleProfileSize >= rect.height()) { 63 // if the blur sigma is too large so the gaussian overlaps the whole 64 // rect in either direction, fall back to CPU path for now. 65 return nullptr; 66 } 67 68 sk_sp<GrTextureProxy> blurProfile(CreateBlurProfileTexture(proxyProvider, sigma)); 69 if (!blurProfile) { 70 return nullptr; 71 } 72 73 return std::unique_ptr<GrFragmentProcessor>(new GrRectBlurEffect( 74 rect, sigma, std::move(blurProfile), 75 GrSamplerState(GrSamplerState::WrapMode::kClamp, GrSamplerState::Filter::kBilerp))); 76 } 77 GrRectBlurEffect(const GrRectBlurEffect& src); 78 std::unique_ptr<GrFragmentProcessor> clone() const override; name()79 const char* name() const override { return "RectBlurEffect"; } 80 81 private: GrRectBlurEffect(SkRect rect,float sigma,sk_sp<GrTextureProxy> blurProfile,GrSamplerState samplerParams)82 GrRectBlurEffect(SkRect rect, float sigma, sk_sp<GrTextureProxy> blurProfile, 83 GrSamplerState samplerParams) 84 : INHERITED(kGrRectBlurEffect_ClassID, 85 (OptimizationFlags)kCompatibleWithCoverageAsAlpha_OptimizationFlag) 86 , fRect(rect) 87 , fSigma(sigma) 88 , fBlurProfile(std::move(blurProfile), samplerParams) { 89 this->addTextureSampler(&fBlurProfile); 90 } 91 GrGLSLFragmentProcessor* onCreateGLSLInstance() const override; 92 void onGetGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder*) const override; 93 bool onIsEqual(const GrFragmentProcessor&) const override; 94 GR_DECLARE_FRAGMENT_PROCESSOR_TEST 95 SkRect fRect; 96 float fSigma; 97 TextureSampler fBlurProfile; 98 typedef GrFragmentProcessor INHERITED; 99 }; 100 #endif 101 #endif 102