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/*
* 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"
#include "GrColorSpaceXform.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)));
}
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)
: INHERITED(kGrRectBlurEffect_ClassID,
(OptimizationFlags)kCompatibleWithCoverageAsAlpha_OptimizationFlag)
, fRect(rect)
, fSigma(sigma)
, fBlurProfile(std::move(blurProfile)) {
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
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