| // 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 "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 kDartWrapperInfo_ui_Image = { |
| "ui", |
| "_Image", |
| sizeof(Image), |
| }; |
| const tonic::DartWrapperInfo& Image::dart_wrapper_info_ = |
| kDartWrapperInfo_ui_Image; |
| |
| #define FOR_EACH_BINDING(V) \ |
| V(Image, width) \ |
| V(Image, height) \ |
| V(Image, toByteData) \ |
| V(Image, dispose) |
| |
| FOR_EACH_BINDING(DART_NATIVE_CALLBACK) |
| |
| void CanvasImage::RegisterNatives(tonic::DartLibraryNatives* natives) { |
| natives->Register({FOR_EACH_BINDING(DART_REGISTER_NATIVE)}); |
| } |
| |
| CanvasImage::CanvasImage() = default; |
| |
| CanvasImage::~CanvasImage() = default; |
| |
| Dart_Handle CanvasImage::toByteData(int format, Dart_Handle callback) { |
| return EncodeImage(this, format, callback); |
| } |
| |
| void CanvasImage::dispose() { |
| auto hint_freed_delegate = UIDartState::Current()->GetHintFreedDelegate(); |
| if (hint_freed_delegate) { |
| hint_freed_delegate->HintFreed(GetAllocationSize()); |
| } |
| image_.reset(); |
| ClearDartWrapper(); |
| } |
| |
| size_t CanvasImage::GetAllocationSize() const { |
| if (auto image = image_.get()) { |
| const auto& info = image->imageInfo(); |
| const auto kMipmapOverhead = 4.0 / 3.0; |
| const size_t image_byte_size = info.computeMinByteSize() * kMipmapOverhead; |
| return image_byte_size + sizeof(this); |
| } else { |
| return sizeof(CanvasImage); |
| } |
| } |
| |
| } // namespace flutter |