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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "ShareableCanvasRenderer.h"
#include "mozilla/dom/WebGLTypes.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/layers/TextureClientSharedSurface.h"
#include "mozilla/layers/CompositableForwarder.h"
#include "mozilla/layers/TextureForwarder.h"
#include "ClientWebGLContext.h"
#include "gfxUtils.h"
#include "GLScreenBuffer.h"
#include "nsICanvasRenderingContextInternal.h"
#include "SharedSurfaceGL.h"
using namespace mozilla::gfx;
namespace mozilla {
namespace layers {
ShareableCanvasRenderer::ShareableCanvasRenderer() {
MOZ_COUNT_CTOR(ShareableCanvasRenderer);
}
ShareableCanvasRenderer::~ShareableCanvasRenderer() {
MOZ_COUNT_DTOR(ShareableCanvasRenderer);
mFrontBufferFromDesc = nullptr;
DisconnectClient();
}
void ShareableCanvasRenderer::Initialize(const CanvasRendererData& aData) {
CanvasRenderer::Initialize(aData);
mCanvasClient = nullptr;
}
void ShareableCanvasRenderer::ClearCachedResources() {
CanvasRenderer::ClearCachedResources();
if (mCanvasClient) {
mCanvasClient->Clear();
}
}
void ShareableCanvasRenderer::DisconnectClient() {
if (mCanvasClient) {
mCanvasClient->OnDetach();
mCanvasClient = nullptr;
}
}
RefPtr<layers::TextureClient> ShareableCanvasRenderer::GetFrontBufferFromDesc(
const layers::SurfaceDescriptor& desc, TextureFlags flags) {
if (mFrontBufferFromDesc && mFrontBufferDesc == desc)
return mFrontBufferFromDesc;
mFrontBufferFromDesc = nullptr;
// Test the validity of aAllocator
const auto& compositableForwarder = GetForwarder();
if (!compositableForwarder) {
return nullptr;
}
const auto& textureForwarder = compositableForwarder->GetTextureForwarder();
auto format = gfx::SurfaceFormat::R8G8B8X8;
if (!mData.mIsOpaque) {
format = gfx::SurfaceFormat::R8G8B8A8;
if (!mData.mIsAlphaPremult) {
flags |= TextureFlags::NON_PREMULTIPLIED;
}
}
mFrontBufferFromDesc = SharedSurfaceTextureData::CreateTextureClient(
desc, format, mData.mSize, flags, textureForwarder);
mFrontBufferDesc = desc;
return mFrontBufferFromDesc;
}
void ShareableCanvasRenderer::UpdateCompositableClient() {
if (!CreateCompositable()) {
return;
}
if (!IsDirty()) {
return;
}
ResetDirty();
const auto context = mData.GetContext();
if (!context) return;
const auto& provider = context->GetBufferProvider();
const auto& forwarder = GetForwarder();
// -
auto flags = TextureFlags::IMMUTABLE;
if (!YIsDown()) {
flags |= TextureFlags::ORIGIN_BOTTOM_LEFT;
}
if (IsOpaque()) {
flags |= TextureFlags::IS_OPAQUE;
}
// -
const auto fnGetExistingTc =
[&](const Maybe<SurfaceDescriptor>& aDesc,
bool& aOutLostFrontTexture) -> RefPtr<TextureClient> {
if (aDesc) {
return GetFrontBufferFromDesc(*aDesc, flags);
}
if (provider) {
if (!provider->SetKnowsCompositor(forwarder, aOutLostFrontTexture)) {
gfxCriticalNote << "BufferProvider::SetForwarder failed";
return nullptr;
}
if (aOutLostFrontTexture) {
return nullptr;
}
return provider->GetTextureClient();
}
return nullptr;
};
// -
const auto fnMakeTcFromSnapshot = [&]() -> RefPtr<TextureClient> {
const auto& size = mData.mSize;
auto contentType = gfxContentType::COLOR;
if (!mData.mIsOpaque) {
contentType = gfxContentType::COLOR_ALPHA;
}
const auto surfaceFormat =
gfxPlatform::GetPlatform()->Optimal2DFormatForContent(contentType);
const auto tc =
mCanvasClient->CreateTextureClientForCanvas(surfaceFormat, size, flags);
if (!tc) {
return nullptr;
}
{
TextureClientAutoLock tcLock(tc, OpenMode::OPEN_WRITE_ONLY);
if (!tcLock.Succeeded()) {
return nullptr;
}
const RefPtr<DrawTarget> dt = tc->BorrowDrawTarget();
const bool requireAlphaPremult = false;
auto borrowed = BorrowSnapshot(requireAlphaPremult);
if (!borrowed) {
return nullptr;
}
dt->CopySurface(borrowed->mSurf, borrowed->mSurf->GetRect(), {0, 0});
}
return tc;
};
// -
{
FirePreTransactionCallback();
const auto desc = context->GetFrontBuffer(nullptr);
if (desc &&
desc->type() == SurfaceDescriptor::TSurfaceDescriptorRemoteTexture) {
const auto& forwarder = GetForwarder();
const auto& textureDesc = desc->get_SurfaceDescriptorRemoteTexture();
if (!mData.mIsAlphaPremult) {
flags |= TextureFlags::NON_PREMULTIPLIED;
}
EnsurePipeline();
RefPtr<FwdTransactionTracker> tracker =
context->UseCompositableForwarder(forwarder);
if (tracker) {
flags |= TextureFlags::WAIT_FOR_REMOTE_TEXTURE_OWNER;
}
forwarder->UseRemoteTexture(mCanvasClient, textureDesc.textureId(),
textureDesc.ownerId(), mData.mSize, flags,
tracker);
FireDidTransactionCallback();
return;
}
EnsurePipeline();
// Let's see if we can get a no-copy TextureClient from the canvas.
bool lostFrontTexture = false;
auto tc = fnGetExistingTc(desc, lostFrontTexture);
if (lostFrontTexture) {
// Device reset could cause this.
return;
}
if (!tc) {
// Otherwise, snapshot the surface and copy into a TexClient.
tc = fnMakeTcFromSnapshot();
}
if (tc != mFrontBufferFromDesc) {
mFrontBufferFromDesc = nullptr;
}
if (!tc) {
NS_WARNING("Couldn't make TextureClient for CanvasRenderer.");
return;
}
mCanvasClient->UseTexture(tc);
FireDidTransactionCallback();
}
}
} // namespace layers
} // namespace mozilla
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