image.h

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.
 
#ifndef FLUTTER_LIB_UI_PAINTING_IMAGE_H_
#define FLUTTER_LIB_UI_PAINTING_IMAGE_H_
 
#include "flutter/display_list/image/dl_image.h"
#include "flutter/lib/ui/dart_wrapper.h"
 
namespace flutter {
 
// Must be kept in sync with painting.dart.
enum class PixelFormat {
  kRgba8888,
  kBgra8888,
  kRgbaFloat32,
  kRFloat32,  // kLastPixelFormat
};
 
constexpr PixelFormat kLastPixelFormat = PixelFormat::kRFloat32;
 
// Must be kept in sync with painting.dart.
enum ColorSpace {
  kSRGB,
  kExtendedSRGB,
};
 
class CanvasImage final : public RefCountedDartWrappable<CanvasImage> {
  DEFINE_WRAPPERTYPEINFO();
  FML_FRIEND_MAKE_REF_COUNTED(CanvasImage);
 
 public:
  ~CanvasImage() override;
 
  static fml::RefPtr<CanvasImage> Create() {
    return fml::MakeRefCounted<CanvasImage>();
  }
 
  Dart_Handle CreateOuterWrapping();
 
  int width() { return image_ ? image_->width() : 0; }
 
  int height() { return image_ ? image_->height() : 0; }
 
  static void decodeImageFromPixelsSync(Dart_Handle pixels_handle,
                                        uint32_t width,
                                        uint32_t height,
                                        int32_t pixel_format,
                                        Dart_Handle raw_image_handle);
 
  Dart_Handle toByteData(int format, Dart_Handle callback);
 
  void dispose();
 
  sk_sp<DlImage> image() const { return image_; }
 
  void set_image(const sk_sp<DlImage>& image) {
    FML_DCHECK(image->isUIThreadSafe());
    image_ = image;
  }
 
  int colorSpace();
 
 private:
  CanvasImage();
 
  sk_sp<DlImage> image_;
};
 
}  // namespace flutter
 
#endif  // FLUTTER_LIB_UI_PAINTING_IMAGE_H_