| /* |
| * Copyright 2016 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "GrTextureProducer.h" |
| #include "GrClip.h" |
| #include "GrProxyProvider.h" |
| #include "GrRenderTargetContext.h" |
| #include "GrTextureProxy.h" |
| #include "SkGr.h" |
| #include "SkRectPriv.h" |
| #include "effects/GrBicubicEffect.h" |
| #include "effects/GrSimpleTextureEffect.h" |
| #include "effects/GrTextureDomain.h" |
| |
| sk_sp<GrTextureProxy> GrTextureProducer::CopyOnGpu(GrContext* context, |
| sk_sp<GrTextureProxy> inputProxy, |
| const CopyParams& copyParams, |
| bool dstWillRequireMipMaps) { |
| SkASSERT(context); |
| |
| const SkRect dstRect = SkRect::MakeIWH(copyParams.fWidth, copyParams.fHeight); |
| GrMipMapped mipMapped = dstWillRequireMipMaps ? GrMipMapped::kYes : GrMipMapped::kNo; |
| |
| SkRect localRect = SkRect::MakeWH(inputProxy->width(), inputProxy->height()); |
| |
| bool needsDomain = false; |
| bool resizing = false; |
| if (copyParams.fFilter != GrSamplerState::Filter::kNearest) { |
| bool resizing = localRect.width() != dstRect.width() || |
| localRect.height() != dstRect.height(); |
| needsDomain = resizing && !GrProxyProvider::IsFunctionallyExact(inputProxy.get()); |
| } |
| |
| if (copyParams.fFilter == GrSamplerState::Filter::kNearest && !needsDomain && !resizing && |
| dstWillRequireMipMaps) { |
| sk_sp<GrTextureProxy> proxy = GrCopyBaseMipMapToTextureProxy(context, inputProxy.get()); |
| if (proxy) { |
| return proxy; |
| } |
| } |
| |
| sk_sp<GrRenderTargetContext> copyRTC = |
| context->contextPriv().makeDeferredRenderTargetContextWithFallback( |
| SkBackingFit::kExact, dstRect.width(), dstRect.height(), inputProxy->config(), |
| nullptr, 1, mipMapped, inputProxy->origin()); |
| if (!copyRTC) { |
| return nullptr; |
| } |
| |
| GrPaint paint; |
| |
| if (needsDomain) { |
| const SkRect domain = localRect.makeInset(0.5f, 0.5f); |
| // This would cause us to read values from outside the subset. Surely, the caller knows |
| // better! |
| SkASSERT(copyParams.fFilter != GrSamplerState::Filter::kMipMap); |
| paint.addColorFragmentProcessor( |
| GrTextureDomainEffect::Make(std::move(inputProxy), SkMatrix::I(), domain, |
| GrTextureDomain::kClamp_Mode, copyParams.fFilter)); |
| } else { |
| GrSamplerState samplerState(GrSamplerState::WrapMode::kClamp, copyParams.fFilter); |
| paint.addColorTextureProcessor(std::move(inputProxy), SkMatrix::I(), samplerState); |
| } |
| paint.setPorterDuffXPFactory(SkBlendMode::kSrc); |
| |
| copyRTC->fillRectToRect(GrNoClip(), std::move(paint), GrAA::kNo, SkMatrix::I(), dstRect, |
| localRect); |
| return copyRTC->asTextureProxyRef(); |
| } |
| |
| /** Determines whether a texture domain is necessary and if so what domain to use. There are two |
| * rectangles to consider: |
| * - The first is the content area specified by the texture adjuster (i.e., textureContentArea). |
| * We can *never* allow filtering to cause bleed of pixels outside this rectangle. |
| * - The second rectangle is the constraint rectangle (i.e., constraintRect), which is known to |
| * be contained by the content area. The filterConstraint specifies whether we are allowed to |
| * bleed across this rect. |
| * |
| * We want to avoid using a domain if possible. We consider the above rectangles, the filter type, |
| * and whether the coords generated by the draw would all fall within the constraint rect. If the |
| * latter is true we only need to consider whether the filter would extend beyond the rects. |
| */ |
| GrTextureProducer::DomainMode GrTextureProducer::DetermineDomainMode( |
| const SkRect& constraintRect, |
| FilterConstraint filterConstraint, |
| bool coordsLimitedToConstraintRect, |
| GrTextureProxy* proxy, |
| const GrSamplerState::Filter* filterModeOrNullForBicubic, |
| SkRect* domainRect) { |
| const SkIRect proxyBounds = SkIRect::MakeWH(proxy->width(), proxy->height()); |
| |
| SkASSERT(proxyBounds.contains(constraintRect)); |
| |
| const bool proxyIsExact = GrProxyProvider::IsFunctionallyExact(proxy); |
| |
| // If the constraint rectangle contains the whole proxy then no need for a domain. |
| if (constraintRect.contains(proxyBounds) && proxyIsExact) { |
| return kNoDomain_DomainMode; |
| } |
| |
| bool restrictFilterToRect = (filterConstraint == GrTextureProducer::kYes_FilterConstraint); |
| |
| // If we can filter outside the constraint rect, and there is no non-content area of the |
| // proxy, and we aren't going to generate sample coords outside the constraint rect then we |
| // don't need a domain. |
| if (!restrictFilterToRect && proxyIsExact && coordsLimitedToConstraintRect) { |
| return kNoDomain_DomainMode; |
| } |
| |
| // Get the domain inset based on sampling mode (or bail if mipped) |
| SkScalar filterHalfWidth = 0.f; |
| if (filterModeOrNullForBicubic) { |
| switch (*filterModeOrNullForBicubic) { |
| case GrSamplerState::Filter::kNearest: |
| if (coordsLimitedToConstraintRect) { |
| return kNoDomain_DomainMode; |
| } else { |
| filterHalfWidth = 0.f; |
| } |
| break; |
| case GrSamplerState::Filter::kBilerp: |
| filterHalfWidth = .5f; |
| break; |
| case GrSamplerState::Filter::kMipMap: |
| if (restrictFilterToRect || !proxyIsExact) { |
| // No domain can save us here. |
| return kTightCopy_DomainMode; |
| } |
| return kNoDomain_DomainMode; |
| } |
| } else { |
| // bicubic does nearest filtering internally. |
| filterHalfWidth = 1.5f; |
| } |
| |
| // Both bilerp and bicubic use bilinear filtering and so need to be clamped to the center |
| // of the edge texel. Pinning to the texel center has no impact on nearest mode and MIP-maps |
| |
| static const SkScalar kDomainInset = 0.5f; |
| // Figure out the limits of pixels we're allowed to sample from. |
| // Unless we know the amount of outset and the texture matrix we have to conservatively enforce |
| // the domain. |
| if (restrictFilterToRect) { |
| *domainRect = constraintRect.makeInset(kDomainInset, kDomainInset); |
| } else if (!proxyIsExact) { |
| // If we got here then: proxy is not exact, the coords are limited to the |
| // constraint rect, and we're allowed to filter across the constraint rect boundary. So |
| // we check whether the filter would reach across the edge of the proxy. |
| // We will only set the sides that are required. |
| |
| *domainRect = SkRectPriv::MakeLargest(); |
| if (coordsLimitedToConstraintRect) { |
| // We may be able to use the fact that the texture coords are limited to the constraint |
| // rect in order to avoid having to add a domain. |
| bool needContentAreaConstraint = false; |
| if (proxyBounds.fRight - filterHalfWidth < constraintRect.fRight) { |
| domainRect->fRight = proxyBounds.fRight - kDomainInset; |
| needContentAreaConstraint = true; |
| } |
| if (proxyBounds.fBottom - filterHalfWidth < constraintRect.fBottom) { |
| domainRect->fBottom = proxyBounds.fBottom - kDomainInset; |
| needContentAreaConstraint = true; |
| } |
| if (!needContentAreaConstraint) { |
| return kNoDomain_DomainMode; |
| } |
| } else { |
| // Our sample coords for the texture are allowed to be outside the constraintRect so we |
| // don't consider it when computing the domain. |
| domainRect->fRight = proxyBounds.fRight - kDomainInset; |
| domainRect->fBottom = proxyBounds.fBottom - kDomainInset; |
| } |
| } else { |
| return kNoDomain_DomainMode; |
| } |
| |
| if (domainRect->fLeft > domainRect->fRight) { |
| domainRect->fLeft = domainRect->fRight = SkScalarAve(domainRect->fLeft, domainRect->fRight); |
| } |
| if (domainRect->fTop > domainRect->fBottom) { |
| domainRect->fTop = domainRect->fBottom = SkScalarAve(domainRect->fTop, domainRect->fBottom); |
| } |
| return kDomain_DomainMode; |
| } |
| |
| std::unique_ptr<GrFragmentProcessor> GrTextureProducer::CreateFragmentProcessorForDomainAndFilter( |
| sk_sp<GrTextureProxy> proxy, |
| const SkMatrix& textureMatrix, |
| DomainMode domainMode, |
| const SkRect& domain, |
| const GrSamplerState::Filter* filterOrNullForBicubic) { |
| SkASSERT(kTightCopy_DomainMode != domainMode); |
| if (filterOrNullForBicubic) { |
| if (kDomain_DomainMode == domainMode) { |
| return GrTextureDomainEffect::Make(std::move(proxy), textureMatrix, domain, |
| GrTextureDomain::kClamp_Mode, |
| *filterOrNullForBicubic); |
| } else { |
| GrSamplerState samplerState(GrSamplerState::WrapMode::kClamp, *filterOrNullForBicubic); |
| return GrSimpleTextureEffect::Make(std::move(proxy), textureMatrix, samplerState); |
| } |
| } else { |
| if (kDomain_DomainMode == domainMode) { |
| return GrBicubicEffect::Make(std::move(proxy), textureMatrix, domain); |
| } else { |
| static const GrSamplerState::WrapMode kClampClamp[] = { |
| GrSamplerState::WrapMode::kClamp, GrSamplerState::WrapMode::kClamp}; |
| return GrBicubicEffect::Make(std::move(proxy), textureMatrix, kClampClamp); |
| } |
| } |
| } |
| |
| sk_sp<GrTextureProxy> GrTextureProducer::refTextureProxyForParams( |
| const GrSamplerState& sampler, |
| SkColorSpace* dstColorSpace, |
| sk_sp<SkColorSpace>* proxyColorSpace, |
| SkScalar scaleAdjust[2]) { |
| // Check that the caller pre-initialized scaleAdjust |
| SkASSERT(!scaleAdjust || (scaleAdjust[0] == 1 && scaleAdjust[1] == 1)); |
| // Check that if the caller passed nullptr for scaleAdjust that we're in the case where there |
| // can be no scaling. |
| SkDEBUGCODE(bool expectNoScale = (sampler.filter() != GrSamplerState::Filter::kMipMap && |
| !sampler.isRepeated())); |
| SkASSERT(scaleAdjust || expectNoScale); |
| auto result = |
| this->onRefTextureProxyForParams(sampler, dstColorSpace, proxyColorSpace, scaleAdjust); |
| |
| // Check that the "no scaling expected" case always returns a proxy of the same size as the |
| // producer. |
| SkASSERT(!result || !expectNoScale || |
| (result->width() == this->width() && result->height() == this->height())); |
| return result; |
| } |
| |
| sk_sp<GrTextureProxy> GrTextureProducer::refTextureProxy(GrMipMapped willNeedMips, |
| SkColorSpace* dstColorSpace, |
| sk_sp<SkColorSpace>* proxyColorSpace) { |
| GrSamplerState::Filter filter = |
| GrMipMapped::kNo == willNeedMips ? GrSamplerState::Filter::kNearest |
| : GrSamplerState::Filter::kMipMap; |
| GrSamplerState sampler(GrSamplerState::WrapMode::kClamp, filter); |
| auto result = |
| this->onRefTextureProxyForParams(sampler, dstColorSpace, proxyColorSpace, nullptr); |
| |
| // Check that no scaling occured and we returned a proxy of the same size as the producer. |
| SkASSERT(!result || (result->width() == this->width() && result->height() == this->height())); |
| return result; |
| } |