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96 lines
3.0 KiB
C++
96 lines
3.0 KiB
C++
// Copyright 2016 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "flutter/content_handler/rasterizer.h"
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#include <utility>
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#include "apps/mozart/lib/skia/skia_vmo_surface.h"
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#include "lib/ftl/logging.h"
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#include "third_party/skia/include/core/SkCanvas.h"
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namespace flutter_runner {
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namespace {
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constexpr uint32_t kContentImageResourceId = 1;
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constexpr uint32_t kRootNodeId = mozart::kSceneRootNodeId;
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} // namespace
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Rasterizer::Rasterizer() {}
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Rasterizer::~Rasterizer() {}
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void Rasterizer::SetScene(fidl::InterfaceHandle<mozart::Scene> scene) {
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scene_.Bind(std::move(scene));
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buffer_producer_.reset(new mozart::BufferProducer());
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}
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void Rasterizer::Draw(std::unique_ptr<flow::LayerTree> layer_tree,
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ftl::Closure callback) {
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FTL_DCHECK(layer_tree);
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if (!scene_) {
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callback();
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return;
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}
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const SkISize& frame_size = layer_tree->frame_size();
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auto update = mozart::SceneUpdate::New();
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sk_sp<SkSurface> surface;
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if (!frame_size.isEmpty()) {
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// Get a surface to draw the contents.
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mozart::ImagePtr image;
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surface = mozart::MakeSkSurface(frame_size, buffer_producer_.get(), &image);
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FTL_CHECK(surface);
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// Update the scene contents.
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mozart::RectF bounds;
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bounds.width = frame_size.width();
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bounds.height = frame_size.height();
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auto content_resource = mozart::Resource::New();
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content_resource->set_image(mozart::ImageResource::New());
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content_resource->get_image()->image = std::move(image);
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update->resources.insert(kContentImageResourceId,
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std::move(content_resource));
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auto root_node = mozart::Node::New();
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root_node->hit_test_behavior = mozart::HitTestBehavior::New();
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root_node->op = mozart::NodeOp::New();
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root_node->op->set_image(mozart::ImageNodeOp::New());
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root_node->op->get_image()->content_rect = bounds.Clone();
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root_node->op->get_image()->image_resource_id = kContentImageResourceId;
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layer_tree->UpdateScene(update.get(), root_node.get());
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update->nodes.insert(kRootNodeId, std::move(root_node));
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} else {
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update->nodes.insert(kRootNodeId, mozart::Node::New());
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}
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// Publish the updated scene contents.
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// TODO(jeffbrown): We should set the metadata's presentation_time here too.
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scene_->Update(std::move(update));
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auto metadata = mozart::SceneMetadata::New();
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metadata->version = layer_tree->scene_version();
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scene_->Publish(std::move(metadata));
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// Draw the contents of the scene to a surface.
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// We do this after publishing to take advantage of pipelining.
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// The image buffer's fence is signalled automatically when the surface
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// goes out of scope.
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if (surface) {
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SkCanvas* canvas = surface->getCanvas();
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flow::CompositorContext::ScopedFrame frame =
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compositor_context_.AcquireFrame(nullptr, *canvas);
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canvas->clear(SK_ColorBLACK);
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layer_tree->Raster(frame);
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canvas->flush();
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}
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callback();
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}
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} // namespace flutter_runner
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