| /* |
| * 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/GrTextureDomain.h" |
| #include "src/gpu/effects/GrTextureEffect.h" |
| |
| GrSurfaceProxyView GrTextureProducer::CopyOnGpu(GrRecordingContext* context, |
| GrSurfaceProxyView inputView, |
| GrColorType colorType, |
| const CopyParams& copyParams, |
| bool dstWillRequireMipMaps) { |
| SkASSERT(context); |
| SkASSERT(inputView.asTextureProxy()); |
| |
| const SkRect dstRect = SkRect::Make(copyParams.fDimensions); |
| GrMipMapped mipMapped = dstWillRequireMipMaps ? GrMipMapped::kYes : GrMipMapped::kNo; |
| |
| GrSurfaceProxy* proxy = inputView.proxy(); |
| SkRect localRect = proxy->getBoundsRect(); |
| |
| bool resizing = false; |
| if (copyParams.fFilter != GrSamplerState::Filter::kNearest) { |
| resizing = localRect.width() != dstRect.width() || localRect.height() != dstRect.height(); |
| } |
| |
| if (copyParams.fFilter == GrSamplerState::Filter::kNearest && !resizing && |
| dstWillRequireMipMaps) { |
| GrSurfaceProxyView view = GrCopyBaseMipMapToTextureProxy(context, proxy, inputView.origin(), |
| colorType); |
| if (view.proxy()) { |
| return view; |
| } |
| } |
| |
| auto copyRTC = GrRenderTargetContext::MakeWithFallback( |
| context, colorType, nullptr, SkBackingFit::kExact, copyParams.fDimensions, 1, |
| mipMapped, proxy->isProtected(), inputView.origin()); |
| if (!copyRTC) { |
| return {}; |
| } |
| |
| const auto& caps = *context->priv().caps(); |
| GrPaint paint; |
| |
| GrSamplerState sampler(GrSamplerState::WrapMode::kClamp, copyParams.fFilter); |
| auto boundsRect = SkIRect::MakeSize(proxy->dimensions()); |
| auto fp = GrTextureEffect::MakeTexelSubset(std::move(inputView), kUnknown_SkAlphaType, |
| SkMatrix::I(), sampler, boundsRect, localRect, caps); |
| paint.addColorFragmentProcessor(std::move(fp)); |
| paint.setPorterDuffXPFactory(SkBlendMode::kSrc); |
| |
| copyRTC->fillRectToRect(GrNoClip(), std::move(paint), GrAA::kNo, SkMatrix::I(), dstRect, |
| localRect); |
| return copyRTC->readSurfaceView(); |
| } |
| |
| /** 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::createFragmentProcessorForDomainAndFilter( |
| GrSurfaceProxyView view, |
| const SkMatrix& textureMatrix, |
| DomainMode domainMode, |
| const SkRect& domain, |
| const GrSamplerState::Filter* filterOrNullForBicubic) { |
| SkASSERT(kTightCopy_DomainMode != domainMode); |
| SkASSERT(view.asTextureProxy()); |
| const auto& caps = *fContext->priv().caps(); |
| SkAlphaType srcAlphaType = this->alphaType(); |
| if (filterOrNullForBicubic) { |
| GrSamplerState::WrapMode wrapMode = fDomainNeedsDecal |
| ? GrSamplerState::WrapMode::kClampToBorder |
| : GrSamplerState::WrapMode::kClamp; |
| GrSamplerState samplerState(wrapMode, *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 const GrSamplerState::WrapMode kClampClamp[] = { |
| GrSamplerState::WrapMode::kClamp, GrSamplerState::WrapMode::kClamp}; |
| static const GrSamplerState::WrapMode kDecalDecal[] = { |
| GrSamplerState::WrapMode::kClampToBorder, GrSamplerState::WrapMode::kClampToBorder}; |
| |
| static constexpr auto kDir = GrBicubicEffect::Direction::kXY; |
| bool clampToBorderSupport = caps.clampToBorderSupport(); |
| if (kDomain_DomainMode == domainMode || (fDomainNeedsDecal && !clampToBorderSupport)) { |
| GrTextureDomain::Mode wrapMode = fDomainNeedsDecal ? GrTextureDomain::kDecal_Mode |
| : GrTextureDomain::kClamp_Mode; |
| return GrBicubicEffect::Make(std::move(view), textureMatrix, kClampClamp, wrapMode, |
| wrapMode, kDir, srcAlphaType, |
| kDomain_DomainMode == domainMode ? &domain : nullptr); |
| } else { |
| return GrBicubicEffect::Make(std::move(view), textureMatrix, |
| fDomainNeedsDecal ? kDecalDecal : kClampClamp, kDir, |
| srcAlphaType); |
| } |
| } |
| } |
| |
| GrSurfaceProxyView GrTextureProducer::viewForParams( |
| const GrSamplerState::Filter* filterOrNullForBicubic, SkScalar scaleAdjust[2]) { |
| GrSamplerState sampler; // Default is nearest + clamp |
| if (filterOrNullForBicubic) { |
| sampler.setFilterMode(*filterOrNullForBicubic); |
| } |
| if (fDomainNeedsDecal) { |
| // Assuming hardware support, switch to clamp-to-border instead of clamp |
| if (fContext->priv().caps()->clampToBorderSupport()) { |
| sampler.setWrapModeX(GrSamplerState::WrapMode::kClampToBorder); |
| sampler.setWrapModeY(GrSamplerState::WrapMode::kClampToBorder); |
| } |
| } |
| return this->viewForParams(sampler, scaleAdjust); |
| } |
| |
| GrSurfaceProxyView GrTextureProducer::viewForParams(GrSamplerState sampler, |
| SkScalar scaleAdjust[2]) { |
| // Check that the caller pre-initialized scaleAdjust |
| SkASSERT(!scaleAdjust || (scaleAdjust[0] == 1 && scaleAdjust[1] == 1)); |
| |
| const GrCaps* caps = this->context()->priv().caps(); |
| |
| int mipCount = SkMipMap::ComputeLevelCount(this->width(), this->height()); |
| bool willBeMipped = GrSamplerState::Filter::kMipMap == sampler.filter() && mipCount && |
| caps->mipMapSupport(); |
| |
| auto result = this->onRefTextureProxyViewForParams(sampler, willBeMipped, scaleAdjust); |
| |
| // Check to make sure that if we say the texture willBeMipped that the returned texture has mip |
| // maps, unless the config is not copyable. |
| SkASSERT(!result.proxy() || !willBeMipped || |
| result.asTextureProxy()->mipMapped() == GrMipMapped::kYes || |
| !caps->isFormatCopyable(result.proxy()->backendFormat())); |
| |
| SkASSERT(!result.proxy() || result.asTextureProxy()); |
| |
| SkDEBUGCODE(bool expectNoScale = (sampler.filter() != GrSamplerState::Filter::kMipMap && |
| !sampler.isRepeated())); |
| // Check that the "no scaling expected" case always returns a proxy of the same size as the |
| // producer. |
| SkASSERT(!result.proxy() || !expectNoScale || |
| result.proxy()->dimensions() == this->dimensions()); |
| |
| return result; |
| } |
| |
| std::pair<GrSurfaceProxyView, GrColorType> GrTextureProducer::view(GrMipMapped willNeedMips) { |
| GrSamplerState::Filter filter = |
| GrMipMapped::kNo == willNeedMips ? GrSamplerState::Filter::kNearest |
| : GrSamplerState::Filter::kMipMap; |
| GrSamplerState sampler(GrSamplerState::WrapMode::kClamp, filter); |
| |
| auto result = this->viewForParams(sampler, nullptr); |
| |
| #ifdef SK_DEBUG |
| const GrCaps* caps = this->context()->priv().caps(); |
| // Check that the resulting proxy format is compatible with the GrColorType of this producer |
| SkASSERT(!result.proxy() || |
| result.proxy()->isFormatCompressed(caps) || |
| caps->areColorTypeAndFormatCompatible(this->colorType(), |
| result.proxy()->backendFormat())); |
| #endif |
| |
| return {result, this->colorType()}; |
| } |
