1 // Copyright 2013 The Flutter Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "flutter/lib/ui/painting/image.h"
6
7 #include "flutter/lib/ui/painting/image_encoding.h"
8
9 namespace flutter {
10
11 typedef CanvasImage Image;
12
13 IMPLEMENT_WRAPPERTYPEINFO(ui, Image);
14
15 #define FOR_EACH_BINDING(V) \
16 V(Image, width) \
17 V(Image, height) \
18 V(Image, toByteData) \
19 V(Image, dispose)
20
FOR_EACH_BINDING(DART_NATIVE_CALLBACK)21 FOR_EACH_BINDING(DART_NATIVE_CALLBACK)
22
23 void CanvasImage::RegisterNatives(tonic::DartLibraryNatives* natives) {
24 }
25
26 CanvasImage::CanvasImage() = default;
27
28 CanvasImage::~CanvasImage() = default;
29
toByteData(int format,Dart_Handle callback)30 Dart_Handle CanvasImage::toByteData(int format, Dart_Handle callback) {
31 return EncodeImage(this, format, callback);
32 }
33
dispose()34 void CanvasImage::dispose() {
35 ClearDartWrapper();
36 }
37
GetAllocationSize()38 size_t CanvasImage::GetAllocationSize() {
39 if (auto image = image_.get()) {
40 #ifdef USE_SYSTEM_SKIA
41 const auto& info = SkImageInfo::Make(image->width(), image->height(), image->colorType(), image->alphaType());
42 #else
43 const auto& info = image->imageInfo();
44 #endif
45 const auto kMipmapOverhead = 4.0 / 3.0;
46 const size_t image_byte_size = info.computeMinByteSize() * kMipmapOverhead;
47 return image_byte_size + sizeof(this);
48 } else {
49 return sizeof(CanvasImage);
50 }
51 }
52
53 } // namespace flutter
54