gfx/thebes/gfxDWriteCommon.h@97036ab72558
gfx/thebes/gfxDWriteCommon.h
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
2 * This Source Code Form is subject to the terms of the Mozilla Public
3 * License, v. 2.0. If a copy of the MPL was not distributed with this
4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6 #ifndef GFX_DWRITECOMMON_H
7 #define GFX_DWRITECOMMON_H
9 // Mozilla includes
10 #include "nscore.h"
11 #include "nsIServiceManager.h"
12 #include "nsCOMPtr.h"
13 #include "nsAutoPtr.h"
14 #include "cairo-features.h"
15 #include "gfxFontConstants.h"
16 #include "nsTArray.h"
17 #include "gfxWindowsPlatform.h"
18 #include "nsIUUIDGenerator.h"
20 #include <windows.h>
21 #include <dwrite.h>
23 static DWRITE_FONT_STRETCH
24 DWriteFontStretchFromStretch(int16_t aStretch)
25 {
26 switch (aStretch) {
27 case NS_FONT_STRETCH_ULTRA_CONDENSED:
28 return DWRITE_FONT_STRETCH_ULTRA_CONDENSED;
29 case NS_FONT_STRETCH_EXTRA_CONDENSED:
30 return DWRITE_FONT_STRETCH_EXTRA_CONDENSED;
31 case NS_FONT_STRETCH_CONDENSED:
32 return DWRITE_FONT_STRETCH_CONDENSED;
33 case NS_FONT_STRETCH_SEMI_CONDENSED:
34 return DWRITE_FONT_STRETCH_SEMI_CONDENSED;
35 case NS_FONT_STRETCH_NORMAL:
36 return DWRITE_FONT_STRETCH_NORMAL;
37 case NS_FONT_STRETCH_SEMI_EXPANDED:
38 return DWRITE_FONT_STRETCH_SEMI_EXPANDED;
39 case NS_FONT_STRETCH_EXPANDED:
40 return DWRITE_FONT_STRETCH_EXPANDED;
41 case NS_FONT_STRETCH_EXTRA_EXPANDED:
42 return DWRITE_FONT_STRETCH_EXTRA_EXPANDED;
43 case NS_FONT_STRETCH_ULTRA_EXPANDED:
44 return DWRITE_FONT_STRETCH_ULTRA_EXPANDED;
45 default:
46 return DWRITE_FONT_STRETCH_UNDEFINED;
47 }
48 }
50 static int16_t
51 FontStretchFromDWriteStretch(DWRITE_FONT_STRETCH aStretch)
52 {
53 switch (aStretch) {
54 case DWRITE_FONT_STRETCH_ULTRA_CONDENSED:
55 return NS_FONT_STRETCH_ULTRA_CONDENSED;
56 case DWRITE_FONT_STRETCH_EXTRA_CONDENSED:
57 return NS_FONT_STRETCH_EXTRA_CONDENSED;
58 case DWRITE_FONT_STRETCH_CONDENSED:
59 return NS_FONT_STRETCH_CONDENSED;
60 case DWRITE_FONT_STRETCH_SEMI_CONDENSED:
61 return NS_FONT_STRETCH_SEMI_CONDENSED;
62 case DWRITE_FONT_STRETCH_NORMAL:
63 return NS_FONT_STRETCH_NORMAL;
64 case DWRITE_FONT_STRETCH_SEMI_EXPANDED:
65 return NS_FONT_STRETCH_SEMI_EXPANDED;
66 case DWRITE_FONT_STRETCH_EXPANDED:
67 return NS_FONT_STRETCH_EXPANDED;
68 case DWRITE_FONT_STRETCH_EXTRA_EXPANDED:
69 return NS_FONT_STRETCH_EXTRA_EXPANDED;
70 case DWRITE_FONT_STRETCH_ULTRA_EXPANDED:
71 return NS_FONT_STRETCH_ULTRA_EXPANDED;
72 default:
73 return NS_FONT_STRETCH_NORMAL;
74 }
75 }
77 struct ffReferenceKey
78 {
79 FallibleTArray<uint8_t> *mArray;
80 nsID mGUID;
81 };
83 class gfxDWriteFontFileLoader : public IDWriteFontFileLoader
84 {
85 public:
86 gfxDWriteFontFileLoader()
87 {
88 }
90 // IUnknown interface
91 IFACEMETHOD(QueryInterface)(IID const& iid, OUT void** ppObject)
92 {
93 if (iid == __uuidof(IDWriteFontFileLoader)) {
94 *ppObject = static_cast<IDWriteFontFileLoader*>(this);
95 return S_OK;
96 } else if (iid == __uuidof(IUnknown)) {
97 *ppObject = static_cast<IUnknown*>(this);
98 return S_OK;
99 } else {
100 return E_NOINTERFACE;
101 }
102 }
104 IFACEMETHOD_(ULONG, AddRef)()
105 {
106 return 1;
107 }
109 IFACEMETHOD_(ULONG, Release)()
110 {
111 return 1;
112 }
114 // IDWriteFontFileLoader methods
115 /**
116 * Important! Note the key here -has- to be a pointer to an
117 * FallibleTArray<uint8_t>.
118 */
119 virtual HRESULT STDMETHODCALLTYPE
120 CreateStreamFromKey(void const* fontFileReferenceKey,
121 UINT32 fontFileReferenceKeySize,
122 OUT IDWriteFontFileStream** fontFileStream);
124 /**
125 * Gets the singleton loader instance. Note that when using this font
126 * loader, the key must be a pointer to an FallibleTArray<uint8_t>. This
127 * array will be empty when the function returns.
128 */
129 static IDWriteFontFileLoader* Instance()
130 {
131 if (!mInstance) {
132 mInstance = new gfxDWriteFontFileLoader();
133 gfxWindowsPlatform::GetPlatform()->GetDWriteFactory()->
134 RegisterFontFileLoader(mInstance);
135 }
136 return mInstance;
137 }
139 private:
140 static IDWriteFontFileLoader* mInstance;
141 };
143 class gfxDWriteFontFileStream MOZ_FINAL : public IDWriteFontFileStream
144 {
145 public:
146 /**
147 * Used by the FontFileLoader to create a new font stream,
148 * this font stream is created from data in memory. The memory
149 * passed may be released after object creation, it will be
150 * copied internally.
151 *
152 * @param aData Font data
153 */
154 gfxDWriteFontFileStream(FallibleTArray<uint8_t> *aData);
155 ~gfxDWriteFontFileStream();
157 // IUnknown interface
158 IFACEMETHOD(QueryInterface)(IID const& iid, OUT void** ppObject)
159 {
160 if (iid == __uuidof(IDWriteFontFileStream)) {
161 *ppObject = static_cast<IDWriteFontFileStream*>(this);
162 return S_OK;
163 } else if (iid == __uuidof(IUnknown)) {
164 *ppObject = static_cast<IUnknown*>(this);
165 return S_OK;
166 } else {
167 return E_NOINTERFACE;
168 }
169 }
171 IFACEMETHOD_(ULONG, AddRef)()
172 {
173 NS_PRECONDITION(int32_t(mRefCnt) >= 0, "illegal refcnt");
174 ++mRefCnt;
175 return mRefCnt;
176 }
178 IFACEMETHOD_(ULONG, Release)()
179 {
180 NS_PRECONDITION(0 != mRefCnt, "dup release");
181 --mRefCnt;
182 if (mRefCnt == 0) {
183 delete this;
184 return 0;
185 }
186 return mRefCnt;
187 }
189 // IDWriteFontFileStream methods
190 virtual HRESULT STDMETHODCALLTYPE ReadFileFragment(void const** fragmentStart,
191 UINT64 fileOffset,
192 UINT64 fragmentSize,
193 OUT void** fragmentContext);
195 virtual void STDMETHODCALLTYPE ReleaseFileFragment(void* fragmentContext);
197 virtual HRESULT STDMETHODCALLTYPE GetFileSize(OUT UINT64* fileSize);
199 virtual HRESULT STDMETHODCALLTYPE GetLastWriteTime(OUT UINT64* lastWriteTime);
201 private:
202 FallibleTArray<uint8_t> mData;
203 nsAutoRefCnt mRefCnt;
204 };
206 #endif /* GFX_DWRITECOMMON_H */
