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/*
* 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 "GrTextureAdjuster.h"
#include "GrColorSpaceXform.h"
#include "GrContext.h"
#include "GrContextPriv.h"
#include "GrGpu.h"
#include "GrProxyProvider.h"
#include "SkGr.h"
GrTextureAdjuster::GrTextureAdjuster(GrContext* context, sk_sp<GrTextureProxy> original,
SkAlphaType alphaType,
uint32_t uniqueID,
SkColorSpace* cs)
: INHERITED(original->width(), original->height(),
GrPixelConfigIsAlphaOnly(original->config()))
, fContext(context)
, fOriginal(std::move(original))
, fAlphaType(alphaType)
, fColorSpace(cs)
, fUniqueID(uniqueID) {}
void GrTextureAdjuster::makeCopyKey(const CopyParams& params, GrUniqueKey* copyKey,
SkColorSpace* dstColorSpace) {
// Destination color space is irrelevant - we already have a texture so we're just sub-setting
GrUniqueKey baseKey;
GrMakeKeyFromImageID(&baseKey, fUniqueID, SkIRect::MakeWH(this->width(), this->height()));
MakeCopyKeyFromOrigKey(baseKey, params, copyKey);
}
void GrTextureAdjuster::didCacheCopy(const GrUniqueKey& copyKey) {
// We don't currently have a mechanism for notifications on Images!
}
sk_sp<GrTextureProxy> GrTextureAdjuster::refTextureProxyCopy(const CopyParams& copyParams,
bool willBeMipped) {
GrProxyProvider* proxyProvider = fContext->contextPriv().proxyProvider();
GrUniqueKey key;
this->makeCopyKey(copyParams, &key, nullptr);
if (key.isValid()) {
sk_sp<GrTextureProxy> cachedCopy =
proxyProvider->findOrCreateProxyByUniqueKey(key, this->originalProxy()->origin());
if (cachedCopy) {
return cachedCopy;
}
}
sk_sp<GrTextureProxy> proxy = this->originalProxyRef();
sk_sp<GrTextureProxy> copy = CopyOnGpu(fContext, std::move(proxy), copyParams, willBeMipped);
if (copy) {
if (key.isValid()) {
SkASSERT(copy->origin() == this->originalProxy()->origin());
proxyProvider->assignUniqueKeyToProxy(key, copy.get());
this->didCacheCopy(key);
}
}
return copy;
}
sk_sp<GrTextureProxy> GrTextureAdjuster::onRefTextureProxyForParams(
const GrSamplerState& params,
SkColorSpace* dstColorSpace,
sk_sp<SkColorSpace>* texColorSpace,
SkScalar scaleAdjust[2]) {
sk_sp<GrTextureProxy> proxy = this->originalProxyRef();
CopyParams copyParams;
if (!fContext) {
// The texture was abandoned.
return nullptr;
}
if (texColorSpace) {
*texColorSpace = sk_ref_sp(fColorSpace);
}
SkASSERT(this->width() <= fContext->contextPriv().caps()->maxTextureSize() &&
this->height() <= fContext->contextPriv().caps()->maxTextureSize());
if (!GrGpu::IsACopyNeededForTextureParams(fContext->contextPriv().caps(), proxy.get(),
proxy->width(), proxy->height(), params, ©Params,
scaleAdjust)) {
return proxy;
}
bool willBeMipped = GrSamplerState::Filter::kMipMap == params.filter();
return this->refTextureProxyCopy(copyParams, willBeMipped);
}
std::unique_ptr<GrFragmentProcessor> GrTextureAdjuster::createFragmentProcessor(
const SkMatrix& origTextureMatrix,
const SkRect& constraintRect,
FilterConstraint filterConstraint,
bool coordsLimitedToConstraintRect,
const GrSamplerState::Filter* filterOrNullForBicubic,
SkColorSpace* dstColorSpace) {
SkMatrix textureMatrix = origTextureMatrix;
SkRect domain;
GrSamplerState samplerState;
if (filterOrNullForBicubic) {
samplerState.setFilterMode(*filterOrNullForBicubic);
}
SkScalar scaleAdjust[2] = { 1.0f, 1.0f };
sk_sp<GrTextureProxy> proxy(
this->refTextureProxyForParams(samplerState, nullptr, nullptr, scaleAdjust));
if (!proxy) {
return nullptr;
}
// If we made a copy then we only copied the contentArea, in which case the new texture is all
// content.
if (proxy.get() != this->originalProxy()) {
textureMatrix.postScale(scaleAdjust[0], scaleAdjust[1]);
}
DomainMode domainMode =
DetermineDomainMode(constraintRect, filterConstraint, coordsLimitedToConstraintRect,
proxy.get(), filterOrNullForBicubic, &domain);
if (kTightCopy_DomainMode == domainMode) {
// TODO: Copy the texture and adjust the texture matrix (both parts need to consider
// non-int constraint rect)
// For now: treat as bilerp and ignore what goes on above level 0.
// We only expect MIP maps to require a tight copy.
SkASSERT(filterOrNullForBicubic &&
GrSamplerState::Filter::kMipMap == *filterOrNullForBicubic);
static const GrSamplerState::Filter kBilerp = GrSamplerState::Filter::kBilerp;
domainMode =
DetermineDomainMode(constraintRect, filterConstraint, coordsLimitedToConstraintRect,
proxy.get(), &kBilerp, &domain);
SkASSERT(kTightCopy_DomainMode != domainMode);
}
SkASSERT(kNoDomain_DomainMode == domainMode ||
(domain.fLeft <= domain.fRight && domain.fTop <= domain.fBottom));
GrPixelConfig config = proxy->config();
auto fp = CreateFragmentProcessorForDomainAndFilter(std::move(proxy), textureMatrix,
domainMode, domain, filterOrNullForBicubic);
return GrColorSpaceXformEffect::Make(std::move(fp), fColorSpace, config, dstColorSpace);
}
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