summaryrefslogtreecommitdiffstats
path: root/dom/canvas/ImageBitmapRenderingContext.cpp
blob: 1761acc34eeb5a59d0e9d38f4ad14781524cd97b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "ImageBitmapRenderingContext.h"
#include "mozilla/dom/ImageBitmapRenderingContextBinding.h"
#include "ImageContainer.h"
#include "ImageLayers.h"

namespace mozilla {
namespace dom {

ImageBitmapRenderingContext::ImageBitmapRenderingContext()
    : mWidth(0), mHeight(0) {}

ImageBitmapRenderingContext::~ImageBitmapRenderingContext() {
  RemovePostRefreshObserver();
}

JSObject* ImageBitmapRenderingContext::WrapObject(
    JSContext* aCx, JS::Handle<JSObject*> aGivenProto) {
  return ImageBitmapRenderingContextBinding::Wrap(aCx, this, aGivenProto);
}

already_AddRefed<layers::Image>
ImageBitmapRenderingContext::ClipToIntrinsicSize() {
  if (!mImage) {
    return nullptr;
  }

  // If image is larger than canvas intrinsic size, clip it to the intrinsic
  // size.
  RefPtr<gfx::SourceSurface> surface;
  RefPtr<layers::Image> result;
  if (mWidth < mImage->GetSize().width || mHeight < mImage->GetSize().height) {
    surface = MatchWithIntrinsicSize();
  } else {
    surface = mImage->GetAsSourceSurface();
  }
  if (!surface) {
    return nullptr;
  }
  result =
      new layers::SourceSurfaceImage(gfx::IntSize(mWidth, mHeight), surface);
  return result.forget();
}

void ImageBitmapRenderingContext::TransferImageBitmap(
    ImageBitmap& aImageBitmap) {
  TransferFromImageBitmap(aImageBitmap);
}

void ImageBitmapRenderingContext::TransferFromImageBitmap(
    ImageBitmap& aImageBitmap) {
  Reset();
  mImage = aImageBitmap.TransferAsImage();

  if (!mImage) {
    return;
  }

  if (aImageBitmap.IsWriteOnly() && mCanvasElement) {
    mCanvasElement->SetWriteOnly();
  }

  Redraw(gfxRect(0, 0, mWidth, mHeight));
}

NS_IMETHODIMP
ImageBitmapRenderingContext::SetDimensions(int32_t aWidth, int32_t aHeight) {
  mWidth = aWidth;
  mHeight = aHeight;
  return NS_OK;
}

NS_IMETHODIMP
ImageBitmapRenderingContext::InitializeWithDrawTarget(
    nsIDocShell* aDocShell, NotNull<gfx::DrawTarget*> aTarget) {
  return NS_ERROR_NOT_IMPLEMENTED;
}

already_AddRefed<DataSourceSurface>
ImageBitmapRenderingContext::MatchWithIntrinsicSize() {
  RefPtr<SourceSurface> surface = mImage->GetAsSourceSurface();
  RefPtr<DataSourceSurface> temp = Factory::CreateDataSourceSurface(
      IntSize(mWidth, mHeight), surface->GetFormat());
  if (!temp) {
    return nullptr;
  }

  DataSourceSurface::ScopedMap map(temp, DataSourceSurface::READ_WRITE);
  if (!map.IsMapped()) {
    return nullptr;
  }

  RefPtr<DrawTarget> dt = Factory::CreateDrawTargetForData(
      gfxPlatform::GetPlatform()->GetSoftwareBackend(), map.GetData(),
      temp->GetSize(), map.GetStride(), temp->GetFormat());
  if (!dt || !dt->IsValid()) {
    gfxWarning()
        << "ImageBitmapRenderingContext::MatchWithIntrinsicSize failed";
    return nullptr;
  }

  dt->ClearRect(Rect(0, 0, mWidth, mHeight));
  dt->CopySurface(
      surface,
      IntRect(0, 0, surface->GetSize().width, surface->GetSize().height),
      IntPoint(0, 0));

  return temp.forget();
}

mozilla::UniquePtr<uint8_t[]> ImageBitmapRenderingContext::GetImageBuffer(
    int32_t* aFormat) {
  *aFormat = 0;

  if (!mImage) {
    return nullptr;
  }

  RefPtr<SourceSurface> surface = mImage->GetAsSourceSurface();
  RefPtr<DataSourceSurface> data = surface->GetDataSurface();
  if (!data) {
    return nullptr;
  }

  if (data->GetSize() != IntSize(mWidth, mHeight)) {
    data = MatchWithIntrinsicSize();
    if (!data) {
      return nullptr;
    }
  }

  *aFormat = imgIEncoder::INPUT_FORMAT_HOSTARGB;
  return SurfaceToPackedBGRA(data);
}

NS_IMETHODIMP
ImageBitmapRenderingContext::GetInputStream(const char* aMimeType,
                                            const char16_t* aEncoderOptions,
                                            nsIInputStream** aStream) {
  nsCString enccid("@mozilla.org/image/encoder;2?type=");
  enccid += aMimeType;
  nsCOMPtr<imgIEncoder> encoder = do_CreateInstance(enccid.get());
  if (!encoder) {
    return NS_ERROR_FAILURE;
  }

  int32_t format = 0;
  UniquePtr<uint8_t[]> imageBuffer = GetImageBuffer(&format);
  if (!imageBuffer) {
    return NS_ERROR_FAILURE;
  }

  return ImageEncoder::GetInputStream(mWidth, mHeight, imageBuffer.get(),
                                      format, encoder, aEncoderOptions,
                                      aStream);
}

already_AddRefed<mozilla::gfx::SourceSurface>
ImageBitmapRenderingContext::GetSurfaceSnapshot(
    gfxAlphaType* const aOutAlphaType) {
  if (!mImage) {
    return nullptr;
  }

  if (aOutAlphaType) {
    *aOutAlphaType =
        (GetIsOpaque() ? gfxAlphaType::Opaque : gfxAlphaType::Premult);
  }

  RefPtr<SourceSurface> surface = mImage->GetAsSourceSurface();
  if (surface->GetSize() != IntSize(mWidth, mHeight)) {
    return MatchWithIntrinsicSize();
  }

  return surface.forget();
}

void ImageBitmapRenderingContext::SetIsOpaque(bool aIsOpaque) {}

bool ImageBitmapRenderingContext::GetIsOpaque() { return false; }

NS_IMETHODIMP
ImageBitmapRenderingContext::Reset() {
  if (mCanvasElement) {
    mCanvasElement->InvalidateCanvas();
  }

  mImage = nullptr;

  return NS_OK;
}

already_AddRefed<Layer> ImageBitmapRenderingContext::GetCanvasLayer(
    nsDisplayListBuilder* aBuilder, Layer* aOldLayer, LayerManager* aManager) {
  if (!mImage) {
    // No DidTransactionCallback will be received, so mark the context clean
    // now so future invalidations will be dispatched.
    MarkContextClean();
    return nullptr;
  }

  RefPtr<ImageLayer> imageLayer;

  if (aOldLayer) {
    imageLayer = static_cast<ImageLayer*>(aOldLayer);
  } else {
    imageLayer = aManager->CreateImageLayer();
  }

  RefPtr<ImageContainer> imageContainer = imageLayer->GetContainer();
  if (!imageContainer) {
    imageContainer = aManager->CreateImageContainer();
    imageLayer->SetContainer(imageContainer);
  }

  AutoTArray<ImageContainer::NonOwningImage, 1> imageList;
  RefPtr<layers::Image> image = ClipToIntrinsicSize();
  if (!image) {
    return nullptr;
  }
  imageList.AppendElement(ImageContainer::NonOwningImage(image));
  imageContainer->SetCurrentImages(imageList);

  return imageLayer.forget();
}

void ImageBitmapRenderingContext::MarkContextClean() {}

NS_IMETHODIMP
ImageBitmapRenderingContext::Redraw(const gfxRect& aDirty) {
  if (!mCanvasElement) {
    return NS_OK;
  }

  mozilla::gfx::Rect rect = ToRect(aDirty);
  mCanvasElement->InvalidateCanvasContent(&rect);
  return NS_OK;
}

NS_IMETHODIMP
ImageBitmapRenderingContext::SetIsIPC(bool aIsIPC) { return NS_OK; }

void ImageBitmapRenderingContext::DidRefresh() {}

void ImageBitmapRenderingContext::MarkContextCleanForFrameCapture() {}

bool ImageBitmapRenderingContext::IsContextCleanForFrameCapture() {
  return true;
}

NS_IMPL_CYCLE_COLLECTING_ADDREF(ImageBitmapRenderingContext)
NS_IMPL_CYCLE_COLLECTING_RELEASE(ImageBitmapRenderingContext)

NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(ImageBitmapRenderingContext,
                                      mCanvasElement, mOffscreenCanvas)

NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(ImageBitmapRenderingContext)
  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
  NS_INTERFACE_MAP_ENTRY(nsICanvasRenderingContextInternal)
  NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END

}  // namespace dom
}  // namespace mozilla