sk_sp<SkImage> SkSurface_Gpu::onNewImageSnapshot() {
GrRenderTargetContext* rtc = fDevice->accessRenderTargetContext();
if (!rtc) {
return nullptr;
}
GrContext* ctx = fDevice->context();
if (!rtc->asSurfaceProxy()) {
return nullptr;
}
SkBudgeted budgeted = rtc->asSurfaceProxy()->isBudgeted();
sk_sp<GrTextureProxy> srcProxy = rtc->asTextureProxyRef();
// If the original render target is a buffer originally created by the client, then we don't
// want to ever retarget the SkSurface at another buffer we create. Force a copy now to avoid
// copy-on-write.
if (!srcProxy || rtc->priv().refsWrappedObjects()) {
SkASSERT(rtc->origin() == rtc->asSurfaceProxy()->origin());
srcProxy = GrSurfaceProxy::Copy(ctx, rtc->asSurfaceProxy(), rtc->mipMapped(), budgeted);
}
const SkImageInfo info = fDevice->imageInfo();
sk_sp<SkImage> image;
if (srcProxy) {
// The renderTargetContext coming out of SkGpuDevice should always be exact and the
// above copy creates a kExact surfaceContext.
SkASSERT(srcProxy->priv().isExact());
image = sk_make_sp<SkImage_Gpu>(ctx, kNeedNewImageUniqueID,
info.alphaType(), std::move(srcProxy),
info.refColorSpace(), budgeted);
}
return image;
}
// Create a new render target and, if necessary, copy the contents of the old
// render target into it. Note that this flushes the SkGpuDevice but
// doesn't force an OpenGL flush.
void SkSurface_Gpu::onCopyOnWrite(ContentChangeMode mode) {
GrRenderTargetContext* rtc = fDevice->accessRenderTargetContext();
// are we sharing our backing proxy with the image? Note this call should never create a new
// image because onCopyOnWrite is only called when there is a cached image.
sk_sp<SkImage> image(this->refCachedImage());
SkASSERT(image);
GrSurfaceProxy* imageProxy = ((SkImage_Base*) image.get())->peekProxy();
SkASSERT(imageProxy);
if (rtc->asSurfaceProxy()->underlyingUniqueID() == imageProxy->underlyingUniqueID()) {
fDevice->replaceRenderTargetContext(SkSurface::kRetain_ContentChangeMode == mode);
} else if (kDiscard_ContentChangeMode == mode) {
this->SkSurface_Gpu::onDiscard();
}
}