image.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 "flutter/lib/ui/painting/image.h"
 
#include <algorithm>
#include <limits>
#include "tonic/logging/dart_invoke.h"
 
#if IMPELLER_SUPPORTS_RENDERING
#include "flutter/lib/ui/painting/image_encoding_impeller.h"
#endif
#include "flutter/lib/ui/painting/image_encoding.h"
#include "third_party/tonic/converter/dart_converter.h"
#include "third_party/tonic/dart_args.h"
#include "third_party/tonic/dart_binding_macros.h"
#include "third_party/tonic/dart_library_natives.h"
 
namespace flutter {
 
typedef CanvasImage Image;
 
// Since _Image is a private class, we can't use IMPLEMENT_WRAPPERTYPEINFO
static const tonic::DartWrapperInfo kDartWrapperInfoUIImage("ui", "_Image");
const tonic::DartWrapperInfo& Image::dart_wrapper_info_ =
    kDartWrapperInfoUIImage;
 
CanvasImage::CanvasImage() = default;
 
CanvasImage::~CanvasImage() = default;
 
Dart_Handle CanvasImage::CreateOuterWrapping() {
  Dart_Handle ui_lib = Dart_LookupLibrary(tonic::ToDart("dart:ui"));
  return tonic::DartInvokeField(ui_lib, "_wrapImage", {ToDart(this)});
}
 
Dart_Handle CanvasImage::toByteData(int format, Dart_Handle callback) {
  return EncodeImage(this, format, callback);
}
 
void CanvasImage::dispose() {
  image_.reset();
  ClearDartWrapper();
}
 
int CanvasImage::colorSpace() {
  if (image_->skia_image()) {
    return ColorSpace::kSRGB;
  } else if (image_->impeller_texture()) {
#if IMPELLER_SUPPORTS_RENDERING
    return ImageEncodingImpeller::GetColorSpace(image_->impeller_texture());
#endif  // IMPELLER_SUPPORTS_RENDERING
  }
 
  return -1;
}
 
}  // namespace flutter