blob: 62ede774daaaa256522eeb53e92035ef890957ff [file] [log] [blame]
/*
* Copyright 2017 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "include/core/SkColorSpace.h"
#include "include/gpu/GrDirectContext.h"
#include "include/gpu/GrRecordingContext.h"
#include "src/core/SkMessageBus.h"
#include "src/gpu/ganesh/GrBackendTextureImageGenerator.h"
#include "src/gpu/ganesh/GrDirectContextPriv.h"
#include "src/gpu/ganesh/GrGpu.h"
#include "src/gpu/ganesh/GrProxyProvider.h"
#include "src/gpu/ganesh/GrRecordingContextPriv.h"
#include "src/gpu/ganesh/GrResourceCache.h"
#include "src/gpu/ganesh/GrResourceProvider.h"
#include "src/gpu/ganesh/GrResourceProviderPriv.h"
#include "src/gpu/ganesh/GrSemaphore.h"
#include "src/gpu/ganesh/GrTexture.h"
#include "src/gpu/ganesh/GrTextureProxyPriv.h"
#include "src/gpu/ganesh/SkGr.h"
GrBackendTextureImageGenerator::RefHelper::RefHelper(
sk_sp<GrTexture> texture,
GrDirectContext::DirectContextID owningContextID,
std::unique_ptr<GrSemaphore> semaphore)
: fOriginalTexture(texture)
, fOwningContextID(owningContextID)
, fBorrowingContextReleaseProc(nullptr)
, fSemaphore(std::move(semaphore)) {}
GrBackendTextureImageGenerator::RefHelper::~RefHelper() {
SkASSERT(!fBorrowingContextID.isValid());
// Generator has been freed, and no one is borrowing the texture. Notify the original cache
// that it can free the last ref, so it happens on the correct thread.
GrResourceCache::ReturnResourceFromThread(std::move(fOriginalTexture), fOwningContextID);
}
std::unique_ptr<SkImageGenerator>
GrBackendTextureImageGenerator::Make(sk_sp<GrTexture> texture,
GrSurfaceOrigin origin,
std::unique_ptr<GrSemaphore> semaphore,
SkColorType colorType,
SkAlphaType alphaType,
sk_sp<SkColorSpace> colorSpace) {
GrDirectContext* dContext = texture->getContext();
if (!dContext->priv().caps()->areColorTypeAndFormatCompatible(
SkColorTypeToGrColorType(colorType), texture->backendFormat())) {
return nullptr;
}
SkColorInfo info(colorType, alphaType, std::move(colorSpace));
return std::unique_ptr<SkImageGenerator>(new GrBackendTextureImageGenerator(
info,
std::move(texture),
origin,
dContext->directContextID(),
std::move(semaphore)));
}
GrBackendTextureImageGenerator::GrBackendTextureImageGenerator(
const SkColorInfo& info,
sk_sp<GrTexture> texture,
GrSurfaceOrigin origin,
GrDirectContext::DirectContextID owningContextID,
std::unique_ptr<GrSemaphore> semaphore)
: INHERITED(SkImageInfo::Make(texture->dimensions(), info))
, fRefHelper(new RefHelper(texture, owningContextID, std::move(semaphore)))
, fBackendTexture(texture->getBackendTexture())
, fSurfaceOrigin(origin) {}
GrBackendTextureImageGenerator::~GrBackendTextureImageGenerator() {
fRefHelper->unref();
}
///////////////////////////////////////////////////////////////////////////////////////////////////
void GrBackendTextureImageGenerator::ReleaseRefHelper_TextureReleaseProc(void* ctx) {
RefHelper* refHelper = static_cast<RefHelper*>(ctx);
SkASSERT(refHelper);
refHelper->fBorrowingContextReleaseProc = nullptr;
refHelper->fBorrowingContextID.makeInvalid();
refHelper->unref();
}
GrSurfaceProxyView GrBackendTextureImageGenerator::onGenerateTexture(
GrRecordingContext* rContext,
const SkImageInfo& info,
GrMipmapped mipmapped,
GrImageTexGenPolicy texGenPolicy) {
SkASSERT(rContext);
SkASSERT_RELEASE(info.dimensions() == fBackendTexture.dimensions());
// We currently limit GrBackendTextureImageGenerators to direct contexts since
// only Flutter uses them and doesn't use recording/DDL contexts. Ideally, the
// cross context texture functionality can be subsumed by the thread-safe cache
// working with utility contexts.
auto dContext = rContext->asDirectContext();
if (!dContext) {
return {};
}
if (dContext->backend() != fBackendTexture.backend()) {
return {};
}
if (info.colorType() != this->getInfo().colorType()) {
return {};
}
auto proxyProvider = dContext->priv().proxyProvider();
fBorrowingMutex.acquire();
sk_sp<skgpu::RefCntedCallback> releaseProcHelper;
if (fRefHelper->fBorrowingContextID.isValid()) {
if (fRefHelper->fBorrowingContextID != dContext->directContextID()) {
fBorrowingMutex.release();
rContext->priv().printWarningMessage(
"GrBackendTextureImageGenerator: Trying to use texture on two GrContexts!\n");
return {};
} else {
SkASSERT(fRefHelper->fBorrowingContextReleaseProc);
// Ref the release proc to be held by the proxy we make below
releaseProcHelper = sk_ref_sp(fRefHelper->fBorrowingContextReleaseProc);
}
} else {
SkASSERT(!fRefHelper->fBorrowingContextReleaseProc);
// The ref we add to fRefHelper here will be passed into and owned by the
// skgpu::RefCntedCallback.
fRefHelper->ref();
releaseProcHelper =
skgpu::RefCntedCallback::Make(ReleaseRefHelper_TextureReleaseProc, fRefHelper);
fRefHelper->fBorrowingContextReleaseProc = releaseProcHelper.get();
}
fRefHelper->fBorrowingContextID = dContext->directContextID();
if (!fRefHelper->fBorrowedTextureKey.isValid()) {
static const auto kDomain = skgpu::UniqueKey::GenerateDomain();
skgpu::UniqueKey::Builder builder(&fRefHelper->fBorrowedTextureKey, kDomain, 1);
builder[0] = this->uniqueID();
}
fBorrowingMutex.release();
SkASSERT(fRefHelper->fBorrowingContextID == dContext->directContextID());
GrBackendFormat backendFormat = fBackendTexture.getBackendFormat();
SkASSERT(backendFormat.isValid());
GrColorType grColorType = SkColorTypeToGrColorType(info.colorType());
GrMipmapped textureIsMipMapped = fBackendTexture.hasMipmaps() ? GrMipmapped::kYes
: GrMipmapped::kNo;
// Ganesh assumes that, when wrapping a mipmapped backend texture from a client, that its
// mipmaps are fully fleshed out.
GrMipmapStatus mipmapStatus = fBackendTexture.hasMipmaps()
? GrMipmapStatus::kValid : GrMipmapStatus::kNotAllocated;
skgpu::Swizzle readSwizzle = dContext->priv().caps()->getReadSwizzle(backendFormat,
grColorType);
// Must make copies of member variables to capture in the lambda since this image generator may
// be deleted before we actually execute the lambda.
sk_sp<GrTextureProxy> proxy = proxyProvider->createLazyProxy(
[refHelper = fRefHelper, releaseProcHelper, backendTexture = fBackendTexture](
GrResourceProvider* resourceProvider,
const GrSurfaceProxy::LazySurfaceDesc&) -> GrSurfaceProxy::LazyCallbackResult {
if (refHelper->fSemaphore) {
resourceProvider->priv().gpu()->waitSemaphore(refHelper->fSemaphore.get());
}
// If a client re-draws the same image multiple times, the texture we return
// will be cached and re-used. If they draw a subset, though, we may be
// re-called. In that case, we want to re-use the borrowed texture we've
// previously created.
sk_sp<GrTexture> tex;
SkASSERT(refHelper->fBorrowedTextureKey.isValid());
auto surf = resourceProvider->findByUniqueKey<GrSurface>(
refHelper->fBorrowedTextureKey);
if (surf) {
SkASSERT(surf->asTexture());
tex = sk_ref_sp(surf->asTexture());
} else {
// We just gained access to the texture. If we're on the original
// context, we could use the original texture, but we'd have no way of
// detecting that it's no longer in-use. So we always make a wrapped
// copy, where the release proc informs us that the context is done with
// it. This is unfortunate - we'll have two texture objects referencing
// the same GPU object. However, no client can ever see the original
// texture, so this should be safe. We make the texture uncacheable so
// that the release proc is called ASAP.
tex = resourceProvider->wrapBackendTexture(
backendTexture, kBorrow_GrWrapOwnership, GrWrapCacheable::kNo,
kRead_GrIOType);
if (!tex) {
return {};
}
tex->setRelease(releaseProcHelper);
tex->resourcePriv().setUniqueKey(refHelper->fBorrowedTextureKey);
}
// We use keys to avoid re-wrapping the GrBackendTexture in a GrTexture.
// This is unrelated to the whatever SkImage key may be assigned to the
// proxy.
return {std::move(tex), true, GrSurfaceProxy::LazyInstantiationKeyMode::kUnsynced};
},
backendFormat,
fBackendTexture.dimensions(),
textureIsMipMapped,
mipmapStatus,
GrInternalSurfaceFlags::kReadOnly,
SkBackingFit::kExact,
skgpu::Budgeted::kNo,
GrProtected::kNo,
GrSurfaceProxy::UseAllocator::kYes,
"BackendTextureImageGenerator");
if (!proxy) {
return {};
}
if (texGenPolicy == GrImageTexGenPolicy::kDraw &&
(mipmapped == GrMipmapped::kNo || proxy->mipmapped() == GrMipmapped::kYes)) {
// If we have the correct mip support, we're done
return GrSurfaceProxyView(std::move(proxy), fSurfaceOrigin, readSwizzle);
} else {
skgpu::Budgeted budgeted = texGenPolicy == GrImageTexGenPolicy::kNew_Uncached_Unbudgeted
? skgpu::Budgeted::kNo
: skgpu::Budgeted::kYes;
auto copy = GrSurfaceProxy::Copy(dContext,
std::move(proxy),
fSurfaceOrigin,
mipmapped,
SkIRect::MakeWH(info.width(), info.height()),
SkBackingFit::kExact,
budgeted,
/*label=*/"BackendTextureImageGenerator_GenerateTexture");
return {std::move(copy), fSurfaceOrigin, readSwizzle};
}
}