aiks_context.h

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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.
 
#ifndef FLUTTER_IMPELLER_AIKS_AIKS_CONTEXT_H_
#define FLUTTER_IMPELLER_AIKS_AIKS_CONTEXT_H_
 
#include <memory>
 
#include "impeller/entity/contents/content_context.h"
#include "impeller/renderer/context.h"
#include "impeller/renderer/render_target.h"
#include "impeller/typographer/typographer_context.h"
 
namespace impeller {
 
struct Picture;
 
class AiksContext {
 public:
  /// Construct a new AiksContext.
  ///
  /// @param context              The Impeller context that Aiks should use for
  ///                             allocating resources and executing device
  ///                             commands. Required.
  /// @param typographer_context  The text backend to use for rendering text. If
  ///                             `nullptr` is supplied, then attempting to draw
  ///                             text with Aiks will result in validation
  ///                             errors.
  /// @param render_target_allocator Injects a render target allocator or
  ///                                allocates its own if none is supplied.
  AiksContext(std::shared_ptr<Context> context,
              std::shared_ptr<TypographerContext> typographer_context,
              std::optional<std::shared_ptr<RenderTargetAllocator>>
                  render_target_allocator = std::nullopt);
 
  ~AiksContext();
 
  bool IsValid() const;
 
  std::shared_ptr<Context> GetContext() const;
 
  ContentContext& GetContentContext() const;
 
  bool Render(const Picture& picture,
              RenderTarget& render_target,
              bool reset_host_buffer);
 
 private:
  std::shared_ptr<Context> context_;
  std::unique_ptr<ContentContext> content_context_;
  bool is_valid_ = false;
 
  AiksContext(const AiksContext&) = delete;
 
  AiksContext& operator=(const AiksContext&) = delete;
};
 
}  // namespace impeller
 
#endif  // FLUTTER_IMPELLER_AIKS_AIKS_CONTEXT_H_