| /* |
| * Copyright 2018 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| in float sigma; |
| layout(ctype=SkRect) in float4 rect; |
| in uniform half cornerRadius; |
| in uniform sampler2D ninePatchSampler; |
| layout(ctype=SkRect) uniform float4 proxyRect; |
| uniform half blurRadius; |
| |
| @header { |
| #include "include/gpu/GrContext.h" |
| #include "include/private/GrRecordingContext.h" |
| #include "src/core/SkBlurPriv.h" |
| #include "src/core/SkGpuBlurUtils.h" |
| #include "src/core/SkRRectPriv.h" |
| #include "src/gpu/GrCaps.h" |
| #include "src/gpu/GrClip.h" |
| #include "src/gpu/GrPaint.h" |
| #include "src/gpu/GrProxyProvider.h" |
| #include "src/gpu/GrRecordingContextPriv.h" |
| #include "src/gpu/GrRenderTargetContext.h" |
| #include "src/gpu/GrStyle.h" |
| } |
| |
| @class { |
| static sk_sp<GrTextureProxy> find_or_create_rrect_blur_mask(GrRecordingContext* context, |
| const SkRRect& rrectToDraw, |
| const SkISize& dimensions, |
| float xformedSigma) { |
| static const GrUniqueKey::Domain kDomain = GrUniqueKey::GenerateDomain(); |
| GrUniqueKey key; |
| GrUniqueKey::Builder builder(&key, kDomain, 9, "RoundRect Blur Mask"); |
| builder[0] = SkScalarCeilToInt(xformedSigma-1/6.0f); |
| |
| int index = 1; |
| for (auto c : { SkRRect::kUpperLeft_Corner, SkRRect::kUpperRight_Corner, |
| SkRRect::kLowerRight_Corner, SkRRect::kLowerLeft_Corner }) { |
| SkASSERT(SkScalarIsInt(rrectToDraw.radii(c).fX) && |
| SkScalarIsInt(rrectToDraw.radii(c).fY)); |
| builder[index++] = SkScalarCeilToInt(rrectToDraw.radii(c).fX); |
| builder[index++] = SkScalarCeilToInt(rrectToDraw.radii(c).fY); |
| } |
| builder.finish(); |
| |
| GrProxyProvider* proxyProvider = context->priv().proxyProvider(); |
| |
| sk_sp<GrTextureProxy> mask(proxyProvider->findOrCreateProxyByUniqueKey( |
| key, GrColorType::kAlpha_8, kBottomLeft_GrSurfaceOrigin)); |
| if (!mask) { |
| // TODO: this could be SkBackingFit::kApprox, but: |
| // 1) The texture coords would need to be updated. |
| // 2) We would have to use GrTextureDomain::kClamp_Mode for the GaussianBlur. |
| auto rtc = context->priv().makeDeferredRenderTargetContextWithFallback( |
| SkBackingFit::kExact, dimensions.fWidth, dimensions.fHeight, |
| GrColorType::kAlpha_8, nullptr); |
| if (!rtc) { |
| return nullptr; |
| } |
| |
| GrPaint paint; |
| |
| rtc->clear(nullptr, SK_PMColor4fTRANSPARENT, |
| GrRenderTargetContext::CanClearFullscreen::kYes); |
| rtc->drawRRect(GrNoClip(), std::move(paint), GrAA::kYes, SkMatrix::I(), rrectToDraw, |
| GrStyle::SimpleFill()); |
| |
| sk_sp<GrTextureProxy> srcProxy(rtc->asTextureProxyRef()); |
| if (!srcProxy) { |
| return nullptr; |
| } |
| auto rtc2 = |
| SkGpuBlurUtils::GaussianBlur(context, |
| std::move(srcProxy), |
| rtc->colorInfo().colorType(), |
| rtc->colorInfo().alphaType(), |
| SkIPoint::Make(0, 0), |
| nullptr, |
| SkIRect::MakeSize(dimensions), |
| SkIRect::MakeEmpty(), |
| xformedSigma, |
| xformedSigma, |
| GrTextureDomain::kIgnore_Mode, |
| SkBackingFit::kExact); |
| if (!rtc2) { |
| return nullptr; |
| } |
| |
| mask = rtc2->asTextureProxyRef(); |
| if (!mask) { |
| return nullptr; |
| } |
| SkASSERT(mask->origin() == kBottomLeft_GrSurfaceOrigin); |
| proxyProvider->assignUniqueKeyToProxy(key, mask.get()); |
| } |
| |
| return mask; |
| } |
| } |
| |
| @optimizationFlags { |
| kCompatibleWithCoverageAsAlpha_OptimizationFlag |
| } |
| |
| @make { |
| static std::unique_ptr<GrFragmentProcessor> Make(GrRecordingContext* context, |
| float sigma, |
| float xformedSigma, |
| const SkRRect& srcRRect, |
| const SkRRect& devRRect); |
| } |
| |
| @cpp { |
| std::unique_ptr<GrFragmentProcessor> GrRRectBlurEffect::Make(GrRecordingContext* context, |
| float sigma, |
| float xformedSigma, |
| const SkRRect& srcRRect, |
| const SkRRect& devRRect) { |
| SkASSERT(!SkRRectPriv::IsCircle(devRRect) && !devRRect.isRect()); // Should've been caught up-stream |
| |
| // TODO: loosen this up |
| if (!SkRRectPriv::IsSimpleCircular(devRRect)) { |
| return nullptr; |
| } |
| |
| // Make sure we can successfully ninepatch this rrect -- the blur sigma has to be |
| // sufficiently small relative to both the size of the corner radius and the |
| // width (and height) of the rrect. |
| SkRRect rrectToDraw; |
| SkISize dimensions; |
| SkScalar ignored[kSkBlurRRectMaxDivisions]; |
| int ignoredSize; |
| uint32_t ignored32; |
| |
| bool ninePatchable = SkComputeBlurredRRectParams(srcRRect, devRRect, |
| SkRect::MakeEmpty(), |
| sigma, xformedSigma, |
| &rrectToDraw, &dimensions, |
| ignored, ignored, |
| ignored, ignored, |
| &ignoredSize, &ignoredSize, |
| &ignored32); |
| if (!ninePatchable) { |
| return nullptr; |
| } |
| |
| sk_sp<GrTextureProxy> mask(find_or_create_rrect_blur_mask(context, rrectToDraw, |
| dimensions, xformedSigma)); |
| if (!mask) { |
| return nullptr; |
| } |
| |
| return std::unique_ptr<GrFragmentProcessor>( |
| new GrRRectBlurEffect(xformedSigma, devRRect.getBounds(), |
| SkRRectPriv::GetSimpleRadii(devRRect).fX, std::move(mask))); |
| } |
| } |
| |
| @test(d) { |
| SkScalar w = d->fRandom->nextRangeScalar(100.f, 1000.f); |
| SkScalar h = d->fRandom->nextRangeScalar(100.f, 1000.f); |
| SkScalar r = d->fRandom->nextRangeF(1.f, 9.f); |
| SkScalar sigma = d->fRandom->nextRangeF(1.f,10.f); |
| SkRRect rrect; |
| rrect.setRectXY(SkRect::MakeWH(w, h), r, r); |
| return GrRRectBlurEffect::Make(d->context(), sigma, sigma, rrect, rrect); |
| } |
| |
| void main() { |
| // warp the fragment position to the appropriate part of the 9patch blur texture |
| |
| half2 rectCenter = half2((proxyRect.xy + proxyRect.zw) / 2.0); |
| half2 translatedFragPos = half2(sk_FragCoord.xy - proxyRect.xy); |
| half threshold = cornerRadius + 2.0 * blurRadius; |
| half2 middle = half2(proxyRect.zw - proxyRect.xy - 2.0 * threshold); |
| |
| if (translatedFragPos.x >= threshold && translatedFragPos.x < (middle.x + threshold)) { |
| translatedFragPos.x = threshold; |
| } else if (translatedFragPos.x >= (middle.x + threshold)) { |
| translatedFragPos.x -= middle.x - 1.0; |
| } |
| |
| if (translatedFragPos.y > threshold && translatedFragPos.y < (middle.y+threshold)) { |
| translatedFragPos.y = threshold; |
| } else if (translatedFragPos.y >= (middle.y + threshold)) { |
| translatedFragPos.y -= middle.y - 1.0; |
| } |
| |
| half2 proxyDims = half2(2.0 * threshold + 1.0); |
| half2 texCoord = translatedFragPos / proxyDims; |
| |
| sk_OutColor = sk_InColor * sample(ninePatchSampler, texCoord); |
| } |
| |
| @setData(pdman) { |
| float blurRadiusValue = 3.f * SkScalarCeilToScalar(sigma - 1 / 6.0f); |
| pdman.set1f(blurRadius, blurRadiusValue); |
| |
| SkRect outset = rect; |
| outset.outset(blurRadiusValue, blurRadiusValue); |
| pdman.set4f(proxyRect, outset.fLeft, outset.fTop, outset.fRight, outset.fBottom); |
| } |