contents_filter_input.cc

Go to the documentation of this file.

// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
#include "impeller/entity/contents/filters/inputs/contents_filter_input.h"
 
#include <optional>
#include <utility>
 
namespace impeller {
 
ContentsFilterInput::ContentsFilterInput(std::shared_ptr<Contents> contents,
                                         bool msaa_enabled)
    : contents_(std::move(contents)), msaa_enabled_(msaa_enabled) {}
 
ContentsFilterInput::~ContentsFilterInput() = default;
 
std::optional<Snapshot> ContentsFilterInput::GetSnapshot(
    std::string_view label,
    const ContentContext& renderer,
    const Entity& entity,
    std::optional<Rect> coverage_limit,
    int32_t mip_count) const {
  if (!coverage_limit.has_value() && entity.GetContents()) {
    coverage_limit = entity.GetContents()->GetCoverageHint();
  }
  if (!snapshot_.has_value()) {
    snapshot_ =
        contents_->RenderToSnapshot(renderer,  // renderer
                                    entity,    // entity
                                    {
                                        .coverage_limit = coverage_limit,    //
                                        .sampler_descriptor = std::nullopt,  //
                                        .msaa_enabled = msaa_enabled_,       //
                                        .mip_count = mip_count,              //
                                        .label = label                       //
                                    });
  }
  return snapshot_;
}
 
std::optional<Rect> ContentsFilterInput::GetCoverage(
    const Entity& entity) const {
  return contents_->GetCoverage(entity);
}
 
}  // namespace impeller