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/*
* Copyright 2018 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrBackendSurface.h"
#include "GrClip.h"
#include "GrContext.h"
#include "GrContextPriv.h"
#include "GrRenderTargetContext.h"
#include "GrTexture.h"
#include "GrTextureAdjuster.h"
#include "effects/GrYUVtoRGBEffect.h"
#include "SkBitmapCache.h"
#include "SkImage_Gpu.h"
#include "SkImage_GpuBase.h"
#include "SkReadPixelsRec.h"
SkImage_GpuBase::SkImage_GpuBase(sk_sp<GrContext> context, int width, int height, uint32_t uniqueID,
SkAlphaType at, SkBudgeted budgeted, sk_sp<SkColorSpace> cs)
: INHERITED(width, height, uniqueID)
, fContext(std::move(context))
, fAlphaType(at)
, fBudgeted(budgeted)
, fColorSpace(std::move(cs)) {}
SkImage_GpuBase::~SkImage_GpuBase() {}
//////////////////////////////////////////////////////////////////////////////////////////////////
bool SkImage_GpuBase::ValidateBackendTexture(GrContext* ctx, const GrBackendTexture& tex,
GrPixelConfig* config, SkColorType ct, SkAlphaType at,
sk_sp<SkColorSpace> cs) {
if (!tex.isValid()) {
return false;
}
// TODO: Create a SkImageColorInfo struct for color, alpha, and color space so we don't need to
// create a fake image info here.
SkImageInfo info = SkImageInfo::Make(1, 1, ct, at, cs);
if (!SkImageInfoIsValid(info)) {
return false;
}
return ctx->contextPriv().caps()->validateBackendTexture(tex, ct, config);
}
//////////////////////////////////////////////////////////////////////////////////////////////////
bool SkImage_GpuBase::getROPixels(SkBitmap* dst, CachingHint chint) const {
if (!fContext->contextPriv().resourceProvider()) {
// DDL TODO: buffer up the readback so it occurs when the DDL is drawn?
return false;
}
const auto desc = SkBitmapCacheDesc::Make(this);
if (SkBitmapCache::Find(desc, dst)) {
SkASSERT(dst->isImmutable());
SkASSERT(dst->getPixels());
return true;
}
SkBitmapCache::RecPtr rec = nullptr;
SkPixmap pmap;
if (kAllow_CachingHint == chint) {
rec = SkBitmapCache::Alloc(desc, this->onImageInfo(), &pmap);
if (!rec) {
return false;
}
} else {
if (!dst->tryAllocPixels(this->onImageInfo()) || !dst->peekPixels(&pmap)) {
return false;
}
}
sk_sp<GrSurfaceContext> sContext = fContext->contextPriv().makeWrappedSurfaceContext(
this->asTextureProxyRef(),
fColorSpace);
if (!sContext) {
return false;
}
if (!sContext->readPixels(pmap.info(), pmap.writable_addr(), pmap.rowBytes(), 0, 0)) {
return false;
}
if (rec) {
SkBitmapCache::Add(std::move(rec), dst);
this->notifyAddedToRasterCache();
}
return true;
}
sk_sp<SkImage> SkImage_GpuBase::onMakeSubset(const SkIRect& subset) const {
sk_sp<GrSurfaceProxy> proxy = this->asTextureProxyRef();
GrSurfaceDesc desc;
desc.fWidth = subset.width();
desc.fHeight = subset.height();
desc.fConfig = proxy->config();
GrBackendFormat format = proxy->backendFormat().makeTexture2D();
if (!format.isValid()) {
return nullptr;
}
sk_sp<GrSurfaceContext> sContext(fContext->contextPriv().makeDeferredSurfaceContext(
format, desc, proxy->origin(), GrMipMapped::kNo, SkBackingFit::kExact, fBudgeted));
if (!sContext) {
return nullptr;
}
if (!sContext->copy(proxy.get(), subset, SkIPoint::Make(0, 0))) {
return nullptr;
}
// MDB: this call is okay bc we know 'sContext' was kExact
return sk_make_sp<SkImage_Gpu>(fContext, kNeedNewImageUniqueID,
fAlphaType, sContext->asTextureProxyRef(),
fColorSpace, fBudgeted);
}
static void apply_premul(const SkImageInfo& info, void* pixels, size_t rowBytes) {
switch (info.colorType()) {
case kRGBA_8888_SkColorType:
case kBGRA_8888_SkColorType:
break;
default:
return; // nothing to do
}
// SkColor is not necesarily RGBA or BGRA, but it is one of them on little-endian,
// and in either case, the alpha-byte is always in the same place, so we can safely call
// SkPreMultiplyColor()
//
SkColor* row = (SkColor*)pixels;
for (int y = 0; y < info.height(); ++y) {
for (int x = 0; x < info.width(); ++x) {
row[x] = SkPreMultiplyColor(row[x]);
}
row = (SkColor*)((char*)(row)+rowBytes);
}
}
bool SkImage_GpuBase::onReadPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRB,
int srcX, int srcY, CachingHint) const {
if (!fContext->contextPriv().resourceProvider()) {
// DDL TODO: buffer up the readback so it occurs when the DDL is drawn?
return false;
}
if (!SkImageInfoValidConversion(dstInfo, this->onImageInfo())) {
return false;
}
SkReadPixelsRec rec(dstInfo, dstPixels, dstRB, srcX, srcY);
if (!rec.trim(this->width(), this->height())) {
return false;
}
// TODO: this seems to duplicate code in GrTextureContext::onReadPixels and
// GrRenderTargetContext::onReadPixels
uint32_t flags = 0;
if (kUnpremul_SkAlphaType == rec.fInfo.alphaType() && kPremul_SkAlphaType == fAlphaType) {
// let the GPU perform this transformation for us
flags = GrContextPriv::kUnpremul_PixelOpsFlag;
}
sk_sp<GrSurfaceContext> sContext = fContext->contextPriv().makeWrappedSurfaceContext(
this->asTextureProxyRef(), fColorSpace);
if (!sContext) {
return false;
}
if (!sContext->readPixels(rec.fInfo, rec.fPixels, rec.fRowBytes, rec.fX, rec.fY, flags)) {
return false;
}
// do we have to manually fix-up the alpha channel?
// src dst
// unpremul premul fix manually
// premul unpremul done by kUnpremul_PixelOpsFlag
// all other combos need to change.
//
// Should this be handled by Ganesh? todo:?
//
if (kPremul_SkAlphaType == rec.fInfo.alphaType() && kUnpremul_SkAlphaType == fAlphaType) {
apply_premul(rec.fInfo, rec.fPixels, rec.fRowBytes);
}
return true;
}
sk_sp<GrTextureProxy> SkImage_GpuBase::asTextureProxyRef(GrContext* context,
const GrSamplerState& params,
SkScalar scaleAdjust[2]) const {
if (context->uniqueID() != fContext->uniqueID()) {
SkASSERT(0);
return nullptr;
}
GrTextureAdjuster adjuster(fContext.get(), this->asTextureProxyRef(), fAlphaType,
this->uniqueID(), fColorSpace.get());
return adjuster.refTextureProxyForParams(params, scaleAdjust);
}
GrBackendTexture SkImage_GpuBase::onGetBackendTexture(bool flushPendingGrContextIO,
GrSurfaceOrigin* origin) const {
sk_sp<GrTextureProxy> proxy = this->asTextureProxyRef();
SkASSERT(proxy);
if (!fContext->contextPriv().resourceProvider() && !proxy->isInstantiated()) {
// This image was created with a DDL context and cannot be instantiated.
return GrBackendTexture();
}
if (!proxy->instantiate(fContext->contextPriv().resourceProvider())) {
return GrBackendTexture(); // invalid
}
GrTexture* texture = proxy->peekTexture();
if (texture) {
if (flushPendingGrContextIO) {
fContext->contextPriv().prepareSurfaceForExternalIO(proxy.get());
}
if (origin) {
*origin = proxy->origin();
}
return texture->getBackendTexture();
}
return GrBackendTexture(); // invalid
}
GrTexture* SkImage_GpuBase::onGetTexture() const {
GrTextureProxy* proxy = this->peekProxy();
if (!proxy) {
return nullptr;
}
sk_sp<GrTextureProxy> proxyRef = this->asTextureProxyRef();
if (!fContext->contextPriv().resourceProvider() && !proxyRef->isInstantiated()) {
// This image was created with a DDL context and cannot be instantiated.
return nullptr;
}
if (!proxy->instantiate(fContext->contextPriv().resourceProvider())) {
return nullptr;
}
return proxy->peekTexture();
}
sk_sp<SkImage> SkImage_GpuBase::onMakeColorSpace(sk_sp<SkColorSpace> target) const {
auto xform = GrColorSpaceXformEffect::Make(fColorSpace.get(), fAlphaType,
target.get(), fAlphaType);
SkASSERT(xform);
sk_sp<GrTextureProxy> proxy = this->asTextureProxyRef();
GrBackendFormat format = proxy->backendFormat().makeTexture2D();
if (!format.isValid()) {
return nullptr;
}
sk_sp<GrRenderTargetContext> renderTargetContext(
fContext->contextPriv().makeDeferredRenderTargetContextWithFallback(
format, SkBackingFit::kExact, this->width(), this->height(),
proxy->config(), nullptr));
if (!renderTargetContext) {
return nullptr;
}
GrPaint paint;
paint.setPorterDuffXPFactory(SkBlendMode::kSrc);
paint.addColorTextureProcessor(std::move(proxy), SkMatrix::I());
paint.addColorFragmentProcessor(std::move(xform));
renderTargetContext->drawRect(GrNoClip(), std::move(paint), GrAA::kNo, SkMatrix::I(),
SkRect::MakeIWH(this->width(), this->height()));
if (!renderTargetContext->asTextureProxy()) {
return nullptr;
}
// MDB: this call is okay bc we know 'renderTargetContext' was exact
return sk_make_sp<SkImage_Gpu>(fContext, kNeedNewImageUniqueID,
fAlphaType, renderTargetContext->asTextureProxyRef(),
std::move(target), fBudgeted);
}
bool SkImage_GpuBase::onIsValid(GrContext* context) const {
// The base class has already checked that context isn't abandoned (if it's not nullptr)
if (fContext->abandoned()) {
return false;
}
if (context && context != fContext.get()) {
return false;
}
return true;
}
bool SkImage_GpuBase::MakeTempTextureProxies(GrContext* ctx, const GrBackendTexture yuvaTextures[],
int numTextures, const SkYUVAIndex yuvaIndices[4],
GrSurfaceOrigin imageOrigin,
sk_sp<GrTextureProxy> tempTextureProxies[4]) {
GrProxyProvider* proxyProvider = ctx->contextPriv().proxyProvider();
// We need to make a copy of the input backend textures because we need to preserve the result
// of validate_backend_texture.
GrBackendTexture yuvaTexturesCopy[4];
for (int textureIndex = 0; textureIndex < numTextures; ++textureIndex) {
yuvaTexturesCopy[textureIndex] = yuvaTextures[textureIndex];
if (!ctx->contextPriv().caps()->getYUVAConfigFromBackendTexture(
yuvaTexturesCopy[textureIndex],
&yuvaTexturesCopy[textureIndex].fConfig)) {
return false;
}
SkASSERT(yuvaTexturesCopy[textureIndex].isValid());
tempTextureProxies[textureIndex] =
proxyProvider->wrapBackendTexture(yuvaTexturesCopy[textureIndex], imageOrigin,
kBorrow_GrWrapOwnership, kRead_GrIOType);
if (!tempTextureProxies[textureIndex]) {
return false;
}
// Check that each texture contains the channel data for the corresponding YUVA index
GrPixelConfig config = yuvaTexturesCopy[textureIndex].fConfig;
for (int yuvaIndex = 0; yuvaIndex < SkYUVAIndex::kIndexCount; ++yuvaIndex) {
if (yuvaIndices[yuvaIndex].fIndex == textureIndex) {
switch (yuvaIndices[yuvaIndex].fChannel) {
case SkColorChannel::kR:
if (kAlpha_8_as_Alpha_GrPixelConfig == config) {
return false;
}
break;
case SkColorChannel::kG:
case SkColorChannel::kB:
if (kAlpha_8_as_Alpha_GrPixelConfig == config ||
kAlpha_8_as_Red_GrPixelConfig == config) {
return false;
}
break;
case SkColorChannel::kA:
default:
if (kRGB_888_GrPixelConfig == config) {
return false;
}
break;
}
}
}
}
return true;
}
bool SkImage_GpuBase::RenderYUVAToRGBA(GrContext* ctx, GrRenderTargetContext* renderTargetContext,
const SkRect& rect, SkYUVColorSpace yuvColorSpace,
const sk_sp<GrTextureProxy> proxies[4],
const SkYUVAIndex yuvaIndices[4]) {
SkASSERT(renderTargetContext);
if (!renderTargetContext->asSurfaceProxy()) {
return false;
}
GrPaint paint;
paint.setPorterDuffXPFactory(SkBlendMode::kSrc);
paint.addColorFragmentProcessor(GrYUVtoRGBEffect::Make(proxies, yuvaIndices,
yuvColorSpace,
GrSamplerState::Filter::kNearest));
renderTargetContext->drawRect(GrNoClip(), std::move(paint), GrAA::kNo, SkMatrix::I(), rect);
// DDL TODO: in the promise image version we must not flush here
ctx->contextPriv().flushSurfaceWrites(renderTargetContext->asSurfaceProxy());
return true;
}
/////////////////////////////////////////////////////////////////////////////////////////////////
sk_sp<GrTexture> SkPromiseImageHelper::getTexture(GrResourceProvider* resourceProvider,
GrPixelConfig config) {
// Releases the promise helper if there are no outstanding hard refs. This means that we
// don't have any ReleaseProcs waiting to be called so we will need to do a fulfill.
if (fReleaseHelper && fReleaseHelper->weak_expired()) {
this->resetReleaseHelper();
}
sk_sp<GrTexture> tex;
if (!fReleaseHelper) {
fFulfillProc(fContext, &fBackendTex);
fBackendTex.fConfig = config;
if (!fBackendTex.isValid()) {
// Even though the GrBackendTexture is not valid, we must call the release
// proc to keep our contract of always calling Fulfill and Release in pairs.
fReleaseProc(fContext);
return sk_sp<GrTexture>();
}
tex = resourceProvider->wrapBackendTexture(fBackendTex, kBorrow_GrWrapOwnership,
kRead_GrIOType);
if (!tex) {
// Even though the GrBackendTexture is not valid, we must call the release
// proc to keep our contract of always calling Fulfill and Release in pairs.
fReleaseProc(fContext);
return sk_sp<GrTexture>();
}
fReleaseHelper = new SkPromiseReleaseProcHelper(fReleaseProc, fContext, fDoneHelper);
// Take a weak ref
fReleaseHelper->weak_ref();
} else {
SkASSERT(fBackendTex.isValid());
tex = resourceProvider->wrapBackendTexture(fBackendTex, kBorrow_GrWrapOwnership,
kRead_GrIOType);
if (!tex) {
// We weren't able to make a texture here, but since we are in this branch
// of the calls (promiseHelper.fReleaseHelper is valid) there is already a
// texture out there which will call the release proc so we don't need to
// call it here.
return sk_sp<GrTexture>();
}
SkAssertResult(fReleaseHelper->try_ref());
}
SkASSERT(tex);
// Pass the hard ref off to the texture
tex->setRelease(sk_sp<GrReleaseProcHelper>(fReleaseHelper));
return tex;
}