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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"
#ifdef MOZ_WIDGET_ANDROID
# include "mozilla/layers/AndroidHardwareBuffer.h"
#endif
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;
}
}
if (desc.type() !=
SurfaceDescriptor::TSurfaceDescriptorAndroidHardwareBuffer) {
mFrontBufferFromDesc = SharedSurfaceTextureData::CreateTextureClient(
desc, format, mData.mSize, flags, textureForwarder);
} else {
#ifdef MOZ_WIDGET_ANDROID
const SurfaceDescriptorAndroidHardwareBuffer& bufferDesc =
desc.get_SurfaceDescriptorAndroidHardwareBuffer();
RefPtr<AndroidHardwareBuffer> buffer =
AndroidHardwareBufferManager::Get()->GetBuffer(bufferDesc.bufferId());
if (!buffer) {
return nullptr;
}
// TextureClient is created only when AndroidHardwareBuffer does not own it.
mFrontBufferFromDesc = buffer->GetTextureClientOfSharedSurfaceTextureData(
desc, format, mData.mSize, flags, textureForwarder);
#else
MOZ_ASSERT_UNREACHABLE("unexpected to be called");
#endif
}
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 webgl = context->AsWebgl();
const auto& forwarder = GetForwarder();
// -
auto flags = TextureFlags::IMMUTABLE;
if (!YIsDown()) {
flags |= TextureFlags::ORIGIN_BOTTOM_LEFT;
}
if (IsOpaque()) {
flags |= TextureFlags::IS_OPAQUE;
}
// -
const auto fnGetExistingTc = [&]() -> RefPtr<TextureClient> {
if (provider) {
auto tc = provider->GetTextureClient();
if (!tc) return nullptr;
if (!provider->SetKnowsCompositor(forwarder)) {
gfxCriticalNote << "BufferProvider::SetForwarder failed";
return nullptr;
}
tc = provider->GetTextureClient(); // Ask again after SetKnowsCompositor
return tc;
}
if (!webgl) return nullptr;
const auto desc = webgl->GetFrontBuffer(nullptr);
if (!desc) return nullptr;
return GetFrontBufferFromDesc(*desc, flags);
};
// -
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;
const auto borrowed = BorrowSnapshot(requireAlphaPremult);
if (!borrowed) return nullptr;
dt->CopySurface(borrowed->mSurf, {{0, 0}, size}, {0, 0});
}
return tc;
};
// -
{
FirePreTransactionCallback();
// First, let's see if we can get a no-copy TextureClient from the canvas.
auto tc = fnGetExistingTc();
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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