| /* |
| * 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 "src/gpu/GrTextureProducer.h" |
| |
| #include "include/private/GrRecordingContext.h" |
| #include "src/core/SkMipMap.h" |
| #include "src/core/SkRectPriv.h" |
| #include "src/gpu/GrClip.h" |
| #include "src/gpu/GrContextPriv.h" |
| #include "src/gpu/GrProxyProvider.h" |
| #include "src/gpu/GrRecordingContextPriv.h" |
| #include "src/gpu/GrRenderTargetContext.h" |
| #include "src/gpu/GrTextureProxy.h" |
| #include "src/gpu/SkGr.h" |
| #include "src/gpu/effects/GrBicubicEffect.h" |
| #include "src/gpu/effects/GrTextureEffect.h" |
| |
| /** 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, |
| GrSurfaceProxy* proxy, |
| const GrSamplerState::Filter* filterModeOrNullForBicubic, |
| SkRect* domainRect) { |
| const SkIRect proxyBounds = SkIRect::MakeSize(proxy->dimensions()); |
| |
| SkASSERT(proxyBounds.contains(constraintRect)); |
| |
| const bool proxyIsExact = proxy->isFunctionallyExact(); |
| |
| // 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). This is used |
| // to evaluate whether we will read outside a non-exact proxy's dimensions. |
| // TODO: Let GrTextureEffect handle this. |
| 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; |
| } |
| |
| if (restrictFilterToRect) { |
| *domainRect = constraintRect; |
| } 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; |
| needContentAreaConstraint = true; |
| } |
| if (proxyBounds.fBottom - filterHalfWidth < constraintRect.fBottom) { |
| domainRect->fBottom = proxyBounds.fBottom; |
| needContentAreaConstraint = true; |
| } |
| if (!needContentAreaConstraint) { |
| return kNoDomain_DomainMode; |
| } |
| } |
| } else { |
| return kNoDomain_DomainMode; |
| } |
| |
| if (!filterModeOrNullForBicubic) { |
| // Bicubic doesn't yet rely on GrTextureEffect to do this insetting. |
| domainRect->inset(0.5f, 0.5f); |
| 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::createFragmentProcessorForSubsetAndFilter( |
| GrSurfaceProxyView view, |
| const SkMatrix& textureMatrix, |
| DomainMode domainMode, |
| const SkRect& domain, |
| GrSamplerState::WrapMode wrapX, |
| GrSamplerState::WrapMode wrapY, |
| const GrSamplerState::Filter* filterOrNullForBicubic) { |
| SkASSERT(kTightCopy_DomainMode != domainMode); |
| SkASSERT(view.asTextureProxy()); |
| const auto& caps = *fContext->priv().caps(); |
| SkAlphaType srcAlphaType = this->alphaType(); |
| if (filterOrNullForBicubic) { |
| GrSamplerState samplerState(wrapX, wrapY, *filterOrNullForBicubic); |
| if (kNoDomain_DomainMode == domainMode) { |
| return GrTextureEffect::Make(std::move(view), srcAlphaType, textureMatrix, samplerState, |
| caps); |
| } |
| return GrTextureEffect::MakeSubset(std::move(view), srcAlphaType, textureMatrix, |
| samplerState, domain, caps); |
| } else { |
| |
| static constexpr auto kDir = GrBicubicEffect::Direction::kXY; |
| const auto& caps = *fContext->priv().caps(); |
| if (kDomain_DomainMode == domainMode) { |
| return GrBicubicEffect::MakeSubset(std::move(view), srcAlphaType, textureMatrix, wrapX, |
| wrapY, domain, kDir, caps); |
| } else { |
| return GrBicubicEffect::Make(std::move(view), srcAlphaType, textureMatrix, wrapX, wrapY, |
| kDir, caps); |
| } |
| } |
| } |
| |
| GrSurfaceProxyView GrTextureProducer::view(GrMipMapped mipMapped) { |
| const GrCaps* caps = this->context()->priv().caps(); |
| // Sanitize the MIP map request. |
| if (mipMapped == GrMipMapped::kYes) { |
| if ((this->width() == 1 && this->height() == 1) || !caps->mipMapSupport()) { |
| mipMapped = GrMipMapped::kNo; |
| } |
| } |
| auto result = this->onView(mipMapped); |
| // Check to make sure if we requested MIPs that the returned texture has MIP maps or the format |
| // is not copyable. |
| SkASSERT(!result || mipMapped == GrMipMapped::kNo || |
| result.asTextureProxy()->mipMapped() == GrMipMapped::kYes || |
| !caps->isFormatCopyable(result.proxy()->backendFormat())); |
| return result; |
| } |
| |
| GrSurfaceProxyView GrTextureProducer::view(GrSamplerState::Filter filter) { |
| auto mipMapped = filter == GrSamplerState::Filter::kMipMap ? GrMipMapped::kYes |
| : GrMipMapped::kNo; |
| return this->view(mipMapped); |
| } |