embedder_external_texture_gl.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_SHELL_PLATFORM_EMBEDDER_EMBEDDER_EXTERNAL_TEXTURE_GL_H_
#define FLUTTER_SHELL_PLATFORM_EMBEDDER_EMBEDDER_EXTERNAL_TEXTURE_GL_H_
 
#include "flutter/common/graphics/texture.h"
#include "flutter/fml/macros.h"
#include "flutter/shell/platform/embedder/embedder.h"
#include "third_party/skia/include/core/SkSize.h"
 
namespace flutter {
 
class EmbedderExternalTextureGL : public flutter::Texture {
 public:
  using ExternalTextureCallback = std::function<
      std::unique_ptr<FlutterOpenGLTexture>(int64_t, size_t, size_t)>;
 
  EmbedderExternalTextureGL(int64_t texture_identifier,
                            const ExternalTextureCallback& callback);
 
  ~EmbedderExternalTextureGL();
 
 private:
  const ExternalTextureCallback& external_texture_callback_;
  sk_sp<DlImage> last_image_;
 
  sk_sp<DlImage> ResolveTexture(int64_t texture_id,
                                GrDirectContext* context,
                                impeller::AiksContext* aiks_context,
                                const SkISize& size);
 
  sk_sp<DlImage> ResolveTextureSkia(int64_t texture_id,
                                    GrDirectContext* context,
                                    const SkISize& size);
 
  sk_sp<DlImage> ResolveTextureImpeller(int64_t texture_id,
                                        impeller::AiksContext* aiks_context,
                                        const SkISize& size);
 
  // |flutter::Texture|
  void Paint(PaintContext& context,
             const DlRect& bounds,
             bool freeze,
             const DlImageSampling sampling) override;
 
  // |flutter::Texture|
  void OnGrContextCreated() override;
 
  // |flutter::Texture|
  void OnGrContextDestroyed() override;
 
  // |flutter::Texture|
  void MarkNewFrameAvailable() override;
 
  // |flutter::Texture|
  void OnTextureUnregistered() override;
 
  FML_DISALLOW_COPY_AND_ASSIGN(EmbedderExternalTextureGL);
};
 
}  // namespace flutter
 
#endif  // FLUTTER_SHELL_PLATFORM_EMBEDDER_EMBEDDER_EXTERNAL_TEXTURE_GL_H_