| /* |
| * Copyright 2017 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| /* |
| * This file was autogenerated from GrRectBlurEffect.fp; do not modify. |
| */ |
| #ifndef GrRectBlurEffect_DEFINED |
| #define GrRectBlurEffect_DEFINED |
| #include "SkTypes.h" |
| #if SK_SUPPORT_GPU |
| |
| #include "GrResourceProvider.h" |
| #include "../effects/SkBlurMask.h" |
| #include "GrFragmentProcessor.h" |
| #include "GrCoordTransform.h" |
| class GrRectBlurEffect : public GrFragmentProcessor { |
| public: |
| static sk_sp<GrTextureProxy> CreateBlurProfileTexture(GrResourceProvider* resourceProvider, |
| float sigma) { |
| unsigned int profileSize = SkScalarCeilToInt(6 * sigma); |
| |
| static const GrUniqueKey::Domain kDomain = GrUniqueKey::GenerateDomain(); |
| GrUniqueKey key; |
| GrUniqueKey::Builder builder(&key, kDomain, 1); |
| builder[0] = profileSize; |
| builder.finish(); |
| |
| sk_sp<GrTextureProxy> blurProfile( |
| resourceProvider->findOrCreateProxyByUniqueKey(key, kTopLeft_GrSurfaceOrigin)); |
| if (!blurProfile) { |
| GrSurfaceDesc texDesc; |
| texDesc.fOrigin = kTopLeft_GrSurfaceOrigin; |
| texDesc.fWidth = profileSize; |
| texDesc.fHeight = 1; |
| texDesc.fConfig = kAlpha_8_GrPixelConfig; |
| |
| std::unique_ptr<uint8_t[]> profile(SkBlurMask::ComputeBlurProfile(sigma)); |
| |
| blurProfile = GrSurfaceProxy::MakeDeferred(resourceProvider, texDesc, SkBudgeted::kYes, |
| profile.get(), 0); |
| if (!blurProfile) { |
| return nullptr; |
| } |
| |
| SkASSERT(blurProfile->origin() == kTopLeft_GrSurfaceOrigin); |
| resourceProvider->assignUniqueKeyToProxy(key, blurProfile.get()); |
| } |
| |
| return blurProfile; |
| } |
| SkRect rect() const { return fRect; } |
| float sigma() const { return fSigma; } |
| |
| static std::unique_ptr<GrFragmentProcessor> Make(GrResourceProvider* resourceProvider, |
| const SkRect& rect, float sigma) { |
| int doubleProfileSize = SkScalarCeilToInt(12 * sigma); |
| |
| if (doubleProfileSize >= rect.width() || doubleProfileSize >= rect.height()) { |
| // if the blur sigma is too large so the gaussian overlaps the whole |
| // rect in either direction, fall back to CPU path for now. |
| return nullptr; |
| } |
| |
| sk_sp<GrTextureProxy> blurProfile(CreateBlurProfileTexture(resourceProvider, sigma)); |
| if (!blurProfile) { |
| return nullptr; |
| } |
| |
| return std::unique_ptr<GrFragmentProcessor>(new GrRectBlurEffect( |
| rect, sigma, std::move(blurProfile), |
| GrSamplerState(GrSamplerState::WrapMode::kClamp, GrSamplerState::Filter::kBilerp))); |
| } |
| GrRectBlurEffect(const GrRectBlurEffect& src); |
| std::unique_ptr<GrFragmentProcessor> clone() const override; |
| const char* name() const override { return "RectBlurEffect"; } |
| |
| private: |
| GrRectBlurEffect(SkRect rect, float sigma, sk_sp<GrTextureProxy> blurProfile, |
| GrSamplerState samplerParams) |
| : INHERITED(kGrRectBlurEffect_ClassID, |
| (OptimizationFlags)kCompatibleWithCoverageAsAlpha_OptimizationFlag) |
| , fRect(rect) |
| , fSigma(sigma) |
| , fBlurProfile(std::move(blurProfile), samplerParams) { |
| this->addTextureSampler(&fBlurProfile); |
| } |
| GrGLSLFragmentProcessor* onCreateGLSLInstance() const override; |
| void onGetGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder*) const override; |
| bool onIsEqual(const GrFragmentProcessor&) const override; |
| GR_DECLARE_FRAGMENT_PROCESSOR_TEST |
| SkRect fRect; |
| float fSigma; |
| TextureSampler fBlurProfile; |
| typedef GrFragmentProcessor INHERITED; |
| }; |
| #endif |
| #endif |