texture_filter_input.cc

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// 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/texture_filter_input.h"
 
#include <utility>
 
#include "impeller/core/formats.h"
 
namespace impeller {
 
TextureFilterInput::TextureFilterInput(std::shared_ptr<Texture> texture,
                                       Matrix local_transform)
    : texture_(std::move(texture)), local_transform_(local_transform) {}
 
TextureFilterInput::~TextureFilterInput() = default;
 
FilterInput::Variant TextureFilterInput::GetInput() const {
  return texture_;
}
 
std::optional<Snapshot> TextureFilterInput::GetSnapshot(
    const std::string& label,
    const ContentContext& renderer,
    const Entity& entity,
    std::optional<Rect> coverage_limit) const {
  auto snapshot =
      Snapshot{.texture = texture_, .transform = GetTransform(entity)};
  if (texture_->GetMipCount() > 1) {
    snapshot.sampler_descriptor.label = "TextureFilterInput Trilinear Sampler";
    snapshot.sampler_descriptor.mip_filter = MipFilter::kLinear;
  }
  return snapshot;
}
 
std::optional<Rect> TextureFilterInput::GetCoverage(
    const Entity& entity) const {
  return Rect::MakeSize(texture_->GetSize())
      .TransformBounds(GetTransform(entity));
}
 
Matrix TextureFilterInput::GetLocalTransform(const Entity& entity) const {
  return local_transform_;
}
 
}  // namespace impeller