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1 /* | 1 /* |
2 * Copyright 2012 Google Inc. | 2 * Copyright 2012 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #include "SkTypes.h" | 8 #include "SkTypes.h" |
9 #include "SkDWriteFontFileStream.h" | 9 #include "SkDWriteFontFileStream.h" |
10 #include "SkHRESULT.h" | 10 #include "SkHRESULT.h" |
11 #include "SkTemplates.h" | 11 #include "SkTemplates.h" |
12 #include "SkTFitsIn.h" | 12 #include "SkTFitsIn.h" |
13 #include "SkTScopedComPtr.h" | 13 #include "SkTScopedComPtr.h" |
14 | 14 |
15 #include <dwrite.h> | 15 #include <dwrite.h> |
16 | 16 |
17 /////////////////////////////////////////////////////////////////////////////// | 17 /////////////////////////////////////////////////////////////////////////////// |
18 // SkIDWriteFontFileStream | 18 // SkIDWriteFontFileStream |
19 | 19 |
20 SkDWriteFontFileStream::SkDWriteFontFileStream(IDWriteFontFileStream* fontFileSt
ream) | 20 SkDWriteFontFileStream::SkDWriteFontFileStream(IDWriteFontFileStream* fontFileSt
ream) |
21 : fFontFileStream(SkRefComPtr(fontFileStream)) | 21 : fFontFileStream(SkRefComPtr(fontFileStream)) |
22 , fPos(0) | 22 , fPos(0) |
23 , fLockedMemory(NULL) | 23 , fLockedMemory(nullptr) |
24 , fFragmentLock(NULL) { | 24 , fFragmentLock(nullptr) { |
25 } | 25 } |
26 | 26 |
27 SkDWriteFontFileStream::~SkDWriteFontFileStream() { | 27 SkDWriteFontFileStream::~SkDWriteFontFileStream() { |
28 if (fFragmentLock) { | 28 if (fFragmentLock) { |
29 fFontFileStream->ReleaseFileFragment(fFragmentLock); | 29 fFontFileStream->ReleaseFileFragment(fFragmentLock); |
30 } | 30 } |
31 } | 31 } |
32 | 32 |
33 size_t SkDWriteFontFileStream::read(void* buffer, size_t size) { | 33 size_t SkDWriteFontFileStream::read(void* buffer, size_t size) { |
34 HRESULT hr = S_OK; | 34 HRESULT hr = S_OK; |
35 | 35 |
36 if (NULL == buffer) { | 36 if (nullptr == buffer) { |
37 size_t fileSize = this->getLength(); | 37 size_t fileSize = this->getLength(); |
38 | 38 |
39 if (fPos + size > fileSize) { | 39 if (fPos + size > fileSize) { |
40 size_t skipped = fileSize - fPos; | 40 size_t skipped = fileSize - fPos; |
41 fPos = fileSize; | 41 fPos = fileSize; |
42 return skipped; | 42 return skipped; |
43 } else { | 43 } else { |
44 fPos += size; | 44 fPos += size; |
45 return size; | 45 return size; |
46 } | 46 } |
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130 return fLockedMemory; | 130 return fLockedMemory; |
131 } | 131 } |
132 | 132 |
133 /////////////////////////////////////////////////////////////////////////////// | 133 /////////////////////////////////////////////////////////////////////////////// |
134 // SkIDWriteFontFileStreamWrapper | 134 // SkIDWriteFontFileStreamWrapper |
135 | 135 |
136 HRESULT SkDWriteFontFileStreamWrapper::Create(SkStreamAsset* stream, | 136 HRESULT SkDWriteFontFileStreamWrapper::Create(SkStreamAsset* stream, |
137 SkDWriteFontFileStreamWrapper** st
reamFontFileStream) | 137 SkDWriteFontFileStreamWrapper** st
reamFontFileStream) |
138 { | 138 { |
139 *streamFontFileStream = new SkDWriteFontFileStreamWrapper(stream); | 139 *streamFontFileStream = new SkDWriteFontFileStreamWrapper(stream); |
140 if (NULL == streamFontFileStream) { | 140 if (nullptr == streamFontFileStream) { |
141 return E_OUTOFMEMORY; | 141 return E_OUTOFMEMORY; |
142 } | 142 } |
143 return S_OK; | 143 return S_OK; |
144 } | 144 } |
145 | 145 |
146 SkDWriteFontFileStreamWrapper::SkDWriteFontFileStreamWrapper(SkStreamAsset* stre
am) | 146 SkDWriteFontFileStreamWrapper::SkDWriteFontFileStreamWrapper(SkStreamAsset* stre
am) |
147 : fRefCount(1), fStream(stream) { | 147 : fRefCount(1), fStream(stream) { |
148 } | 148 } |
149 | 149 |
150 HRESULT STDMETHODCALLTYPE SkDWriteFontFileStreamWrapper::QueryInterface(REFIID i
id, void** ppvObject) { | 150 HRESULT STDMETHODCALLTYPE SkDWriteFontFileStreamWrapper::QueryInterface(REFIID i
id, void** ppvObject) { |
151 if (iid == IID_IUnknown || iid == __uuidof(IDWriteFontFileStream)) { | 151 if (iid == IID_IUnknown || iid == __uuidof(IDWriteFontFileStream)) { |
152 *ppvObject = this; | 152 *ppvObject = this; |
153 AddRef(); | 153 AddRef(); |
154 return S_OK; | 154 return S_OK; |
155 } else { | 155 } else { |
156 *ppvObject = NULL; | 156 *ppvObject = nullptr; |
157 return E_NOINTERFACE; | 157 return E_NOINTERFACE; |
158 } | 158 } |
159 } | 159 } |
160 | 160 |
161 ULONG STDMETHODCALLTYPE SkDWriteFontFileStreamWrapper::AddRef() { | 161 ULONG STDMETHODCALLTYPE SkDWriteFontFileStreamWrapper::AddRef() { |
162 return InterlockedIncrement(&fRefCount); | 162 return InterlockedIncrement(&fRefCount); |
163 } | 163 } |
164 | 164 |
165 ULONG STDMETHODCALLTYPE SkDWriteFontFileStreamWrapper::Release() { | 165 ULONG STDMETHODCALLTYPE SkDWriteFontFileStreamWrapper::Release() { |
166 ULONG newCount = InterlockedDecrement(&fRefCount); | 166 ULONG newCount = InterlockedDecrement(&fRefCount); |
167 if (0 == newCount) { | 167 if (0 == newCount) { |
168 delete this; | 168 delete this; |
169 } | 169 } |
170 return newCount; | 170 return newCount; |
171 } | 171 } |
172 | 172 |
173 HRESULT STDMETHODCALLTYPE SkDWriteFontFileStreamWrapper::ReadFileFragment( | 173 HRESULT STDMETHODCALLTYPE SkDWriteFontFileStreamWrapper::ReadFileFragment( |
174 void const** fragmentStart, | 174 void const** fragmentStart, |
175 UINT64 fileOffset, | 175 UINT64 fileOffset, |
176 UINT64 fragmentSize, | 176 UINT64 fragmentSize, |
177 void** fragmentContext) | 177 void** fragmentContext) |
178 { | 178 { |
179 // The loader is responsible for doing a bounds check. | 179 // The loader is responsible for doing a bounds check. |
180 UINT64 fileSize; | 180 UINT64 fileSize; |
181 this->GetFileSize(&fileSize); | 181 this->GetFileSize(&fileSize); |
182 if (fileOffset > fileSize || fragmentSize > fileSize - fileOffset) { | 182 if (fileOffset > fileSize || fragmentSize > fileSize - fileOffset) { |
183 *fragmentStart = NULL; | 183 *fragmentStart = nullptr; |
184 *fragmentContext = NULL; | 184 *fragmentContext = nullptr; |
185 return E_FAIL; | 185 return E_FAIL; |
186 } | 186 } |
187 | 187 |
188 if (!SkTFitsIn<size_t>(fileOffset + fragmentSize)) { | 188 if (!SkTFitsIn<size_t>(fileOffset + fragmentSize)) { |
189 return E_FAIL; | 189 return E_FAIL; |
190 } | 190 } |
191 | 191 |
192 const void* data = fStream->getMemoryBase(); | 192 const void* data = fStream->getMemoryBase(); |
193 if (data) { | 193 if (data) { |
194 *fragmentStart = static_cast<BYTE const*>(data) + static_cast<size_t>(fi
leOffset); | 194 *fragmentStart = static_cast<BYTE const*>(data) + static_cast<size_t>(fi
leOffset); |
195 *fragmentContext = NULL; | 195 *fragmentContext = nullptr; |
196 | 196 |
197 } else { | 197 } else { |
198 // May be called from multiple threads. | 198 // May be called from multiple threads. |
199 SkAutoMutexAcquire ama(fStreamMutex); | 199 SkAutoMutexAcquire ama(fStreamMutex); |
200 | 200 |
201 *fragmentStart = NULL; | 201 *fragmentStart = nullptr; |
202 *fragmentContext = NULL; | 202 *fragmentContext = nullptr; |
203 | 203 |
204 if (!fStream->seek(static_cast<size_t>(fileOffset))) { | 204 if (!fStream->seek(static_cast<size_t>(fileOffset))) { |
205 return E_FAIL; | 205 return E_FAIL; |
206 } | 206 } |
207 SkAutoTMalloc<uint8_t> streamData(static_cast<size_t>(fragmentSize)); | 207 SkAutoTMalloc<uint8_t> streamData(static_cast<size_t>(fragmentSize)); |
208 if (fStream->read(streamData.get(), static_cast<size_t>(fragmentSize)) !
= fragmentSize) { | 208 if (fStream->read(streamData.get(), static_cast<size_t>(fragmentSize)) !
= fragmentSize) { |
209 return E_FAIL; | 209 return E_FAIL; |
210 } | 210 } |
211 | 211 |
212 *fragmentStart = streamData.get(); | 212 *fragmentStart = streamData.get(); |
213 *fragmentContext = streamData.detach(); | 213 *fragmentContext = streamData.detach(); |
214 } | 214 } |
215 return S_OK; | 215 return S_OK; |
216 } | 216 } |
217 | 217 |
218 void STDMETHODCALLTYPE SkDWriteFontFileStreamWrapper::ReleaseFileFragment(void*
fragmentContext) { | 218 void STDMETHODCALLTYPE SkDWriteFontFileStreamWrapper::ReleaseFileFragment(void*
fragmentContext) { |
219 sk_free(fragmentContext); | 219 sk_free(fragmentContext); |
220 } | 220 } |
221 | 221 |
222 HRESULT STDMETHODCALLTYPE SkDWriteFontFileStreamWrapper::GetFileSize(UINT64* fil
eSize) { | 222 HRESULT STDMETHODCALLTYPE SkDWriteFontFileStreamWrapper::GetFileSize(UINT64* fil
eSize) { |
223 *fileSize = fStream->getLength(); | 223 *fileSize = fStream->getLength(); |
224 return S_OK; | 224 return S_OK; |
225 } | 225 } |
226 | 226 |
227 HRESULT STDMETHODCALLTYPE SkDWriteFontFileStreamWrapper::GetLastWriteTime(UINT64
* lastWriteTime) { | 227 HRESULT STDMETHODCALLTYPE SkDWriteFontFileStreamWrapper::GetLastWriteTime(UINT64
* lastWriteTime) { |
228 // The concept of last write time does not apply to this loader. | 228 // The concept of last write time does not apply to this loader. |
229 *lastWriteTime = 0; | 229 *lastWriteTime = 0; |
230 return E_NOTIMPL; | 230 return E_NOTIMPL; |
231 } | 231 } |
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