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
|
/* -*- 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 "ImageOps.h"
#include "ClippedImage.h"
#include "Decoder.h"
#include "DecoderFactory.h"
#include "DynamicImage.h"
#include "FrozenImage.h"
#include "IDecodingTask.h"
#include "Image.h"
#include "ImageMetadata.h"
#include "imgIContainer.h"
#include "mozilla/gfx/2D.h"
#include "nsNetUtil.h" // for NS_NewBufferedInputStream
#include "nsStreamUtils.h"
#include "OrientedImage.h"
#include "SourceBuffer.h"
using namespace mozilla::gfx;
namespace mozilla::image {
/* static */
already_AddRefed<Image> ImageOps::Freeze(Image* aImage) {
RefPtr<Image> frozenImage = new FrozenImage(aImage);
return frozenImage.forget();
}
/* static */
already_AddRefed<imgIContainer> ImageOps::Freeze(imgIContainer* aImage) {
nsCOMPtr<imgIContainer> frozenImage =
new FrozenImage(static_cast<Image*>(aImage));
return frozenImage.forget();
}
/* static */
already_AddRefed<Image> ImageOps::Clip(Image* aImage, nsIntRect aClip,
const Maybe<nsSize>& aSVGViewportSize) {
RefPtr<Image> clippedImage =
new ClippedImage(aImage, aClip, aSVGViewportSize);
return clippedImage.forget();
}
/* static */
already_AddRefed<imgIContainer> ImageOps::Clip(
imgIContainer* aImage, nsIntRect aClip,
const Maybe<nsSize>& aSVGViewportSize) {
nsCOMPtr<imgIContainer> clippedImage =
new ClippedImage(static_cast<Image*>(aImage), aClip, aSVGViewportSize);
return clippedImage.forget();
}
/* static */
already_AddRefed<Image> ImageOps::Orient(Image* aImage,
Orientation aOrientation) {
if (aOrientation.IsIdentity()) {
return do_AddRef(aImage);
}
RefPtr<Image> image = new OrientedImage(aImage, aOrientation);
return image.forget();
}
/* static */
already_AddRefed<imgIContainer> ImageOps::Orient(imgIContainer* aImage,
Orientation aOrientation) {
return Orient(static_cast<Image*>(aImage), aOrientation);
}
/* static */
already_AddRefed<imgIContainer> ImageOps::Unorient(imgIContainer* aImage) {
return Orient(aImage, aImage->GetOrientation().Reversed());
}
/* static */
already_AddRefed<imgIContainer> ImageOps::CreateFromDrawable(
gfxDrawable* aDrawable) {
nsCOMPtr<imgIContainer> drawableImage = new DynamicImage(aDrawable);
return drawableImage.forget();
}
class ImageOps::ImageBufferImpl final : public ImageOps::ImageBuffer {
public:
explicit ImageBufferImpl(already_AddRefed<SourceBuffer> aSourceBuffer)
: mSourceBuffer(aSourceBuffer) {}
protected:
~ImageBufferImpl() override {}
already_AddRefed<SourceBuffer> GetSourceBuffer() const override {
RefPtr<SourceBuffer> sourceBuffer = mSourceBuffer;
return sourceBuffer.forget();
}
private:
RefPtr<SourceBuffer> mSourceBuffer;
};
/* static */ already_AddRefed<ImageOps::ImageBuffer>
ImageOps::CreateImageBuffer(already_AddRefed<nsIInputStream> aInputStream) {
nsCOMPtr<nsIInputStream> inputStream = std::move(aInputStream);
MOZ_ASSERT(inputStream);
nsresult rv;
// Prepare the input stream.
if (!NS_InputStreamIsBuffered(inputStream)) {
nsCOMPtr<nsIInputStream> bufStream;
rv = NS_NewBufferedInputStream(getter_AddRefs(bufStream),
inputStream.forget(), 1024);
if (NS_WARN_IF(NS_FAILED(rv))) {
return nullptr;
}
inputStream = std::move(bufStream);
}
// Figure out how much data we've been passed.
uint64_t length;
rv = inputStream->Available(&length);
if (NS_FAILED(rv) || length > UINT32_MAX) {
return nullptr;
}
// Write the data into a SourceBuffer.
RefPtr<SourceBuffer> sourceBuffer = new SourceBuffer();
sourceBuffer->ExpectLength(length);
rv = sourceBuffer->AppendFromInputStream(inputStream, length);
if (NS_FAILED(rv)) {
return nullptr;
}
// Make sure our sourceBuffer is marked as complete.
if (sourceBuffer->IsComplete()) {
NS_WARNING(
"The SourceBuffer was unexpectedly marked as complete. This may "
"indicate either an OOM condition, or that imagelib was not "
"initialized properly.");
return nullptr;
}
sourceBuffer->Complete(NS_OK);
RefPtr<ImageBuffer> imageBuffer = new ImageBufferImpl(sourceBuffer.forget());
return imageBuffer.forget();
}
/* static */
nsresult ImageOps::DecodeMetadata(already_AddRefed<nsIInputStream> aInputStream,
const nsACString& aMimeType,
ImageMetadata& aMetadata) {
nsCOMPtr<nsIInputStream> inputStream = std::move(aInputStream);
RefPtr<ImageBuffer> buffer = CreateImageBuffer(inputStream.forget());
return DecodeMetadata(buffer, aMimeType, aMetadata);
}
/* static */
nsresult ImageOps::DecodeMetadata(ImageBuffer* aBuffer,
const nsACString& aMimeType,
ImageMetadata& aMetadata) {
if (!aBuffer) {
return NS_ERROR_FAILURE;
}
RefPtr<SourceBuffer> sourceBuffer = aBuffer->GetSourceBuffer();
if (NS_WARN_IF(!sourceBuffer)) {
return NS_ERROR_FAILURE;
}
// Create a decoder.
DecoderType decoderType =
DecoderFactory::GetDecoderType(PromiseFlatCString(aMimeType).get());
RefPtr<Decoder> decoder = DecoderFactory::CreateAnonymousMetadataDecoder(
decoderType, WrapNotNull(sourceBuffer));
if (!decoder) {
return NS_ERROR_FAILURE;
}
// Run the decoder synchronously.
RefPtr<IDecodingTask> task =
new AnonymousDecodingTask(WrapNotNull(decoder), /* aResumable */ false);
task->Run();
if (!decoder->GetDecodeDone() || decoder->HasError()) {
return NS_ERROR_FAILURE;
}
aMetadata = decoder->GetImageMetadata();
if (aMetadata.GetNativeSizes().IsEmpty() && aMetadata.HasSize()) {
aMetadata.AddNativeSize(aMetadata.GetSize());
}
return NS_OK;
}
/* static */ already_AddRefed<gfx::SourceSurface> ImageOps::DecodeToSurface(
already_AddRefed<nsIInputStream> aInputStream, const nsACString& aMimeType,
uint32_t aFlags, const Maybe<IntSize>& aSize /* = Nothing() */) {
nsCOMPtr<nsIInputStream> inputStream = std::move(aInputStream);
RefPtr<ImageBuffer> buffer = CreateImageBuffer(inputStream.forget());
return DecodeToSurface(buffer, aMimeType, aFlags, aSize);
}
/* static */ already_AddRefed<gfx::SourceSurface> ImageOps::DecodeToSurface(
ImageBuffer* aBuffer, const nsACString& aMimeType, uint32_t aFlags,
const Maybe<IntSize>& aSize /* = Nothing() */) {
if (!aBuffer) {
return nullptr;
}
RefPtr<SourceBuffer> sourceBuffer = aBuffer->GetSourceBuffer();
if (NS_WARN_IF(!sourceBuffer)) {
return nullptr;
}
// Create a decoder.
DecoderType decoderType =
DecoderFactory::GetDecoderType(PromiseFlatCString(aMimeType).get());
RefPtr<Decoder> decoder = DecoderFactory::CreateAnonymousDecoder(
decoderType, WrapNotNull(sourceBuffer), aSize,
DecoderFlags::FIRST_FRAME_ONLY, ToSurfaceFlags(aFlags));
if (!decoder) {
return nullptr;
}
// Run the decoder synchronously.
RefPtr<IDecodingTask> task =
new AnonymousDecodingTask(WrapNotNull(decoder), /* aResumable */ false);
task->Run();
if (!decoder->GetDecodeDone() || decoder->HasError()) {
return nullptr;
}
// Pull out the surface.
RawAccessFrameRef frame = decoder->GetCurrentFrameRef();
if (!frame) {
return nullptr;
}
RefPtr<SourceSurface> surface = frame->GetSourceSurface();
if (!surface) {
return nullptr;
}
return surface.forget();
}
} // namespace mozilla::image
|
