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1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef APP_SURFACE_TRANSPORT_DIB_H_ | 5 #ifndef APP_SURFACE_TRANSPORT_DIB_H_ |
6 #define APP_SURFACE_TRANSPORT_DIB_H_ | 6 #define APP_SURFACE_TRANSPORT_DIB_H_ |
7 #pragma once | 7 #pragma once |
8 | 8 |
9 #include "base/basictypes.h" | 9 #include "base/basictypes.h" |
10 | 10 |
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88 static Handle DefaultHandleValue() { return Handle(); } | 88 static Handle DefaultHandleValue() { return Handle(); } |
89 | 89 |
90 // Returns a value that is ONLY USEFUL FOR TESTS WHERE IT WON'T BE | 90 // Returns a value that is ONLY USEFUL FOR TESTS WHERE IT WON'T BE |
91 // ACTUALLY USED AS A REAL HANDLE. | 91 // ACTUALLY USED AS A REAL HANDLE. |
92 static Handle GetFakeHandleForTest() { | 92 static Handle GetFakeHandleForTest() { |
93 static int fake_handle = 10; | 93 static int fake_handle = 10; |
94 return Handle(fake_handle++, false); | 94 return Handle(fake_handle++, false); |
95 } | 95 } |
96 #elif defined(USE_X11) | 96 #elif defined(USE_X11) |
97 typedef int Handle; // These two ints are SysV IPC shared memory keys | 97 typedef int Handle; // These two ints are SysV IPC shared memory keys |
98 typedef int Id; | 98 struct Id { |
99 // Ensure that default initialized Ids are invalid. | |
100 Id() : shmkey(-1) { | |
101 } | |
102 | |
103 bool operator< (const Id& other) const { | |
brettw
2011/03/24 23:54:34
I think normal style would be no space afer the <
| |
104 return shmkey < other.shmkey; | |
105 } | |
106 | |
107 int shmkey; | |
108 }; | |
99 | 109 |
100 // Returns a default, invalid handle, that is meant to indicate a missing | 110 // Returns a default, invalid handle, that is meant to indicate a missing |
101 // Transport DIB. | 111 // Transport DIB. |
102 static Handle DefaultHandleValue() { return -1; } | 112 static Handle DefaultHandleValue() { return -1; } |
103 | 113 |
104 // Returns a value that is ONLY USEFUL FOR TESTS WHERE IT WON'T BE | 114 // Returns a value that is ONLY USEFUL FOR TESTS WHERE IT WON'T BE |
105 // ACTUALLY USED AS A REAL HANDLE. | 115 // ACTUALLY USED AS A REAL HANDLE. |
106 static Handle GetFakeHandleForTest() { | 116 static Handle GetFakeHandleForTest() { |
107 static int fake_handle = 10; | 117 static int fake_handle = 10; |
108 return fake_handle++; | 118 return fake_handle++; |
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122 | 132 |
123 // Map the referenced transport DIB. The caller owns the returned object. | 133 // Map the referenced transport DIB. The caller owns the returned object. |
124 // Returns NULL on failure. | 134 // Returns NULL on failure. |
125 static TransportDIB* Map(Handle transport_dib); | 135 static TransportDIB* Map(Handle transport_dib); |
126 | 136 |
127 // Create a new |TransportDIB| with a handle to the shared memory. This | 137 // Create a new |TransportDIB| with a handle to the shared memory. This |
128 // always returns a valid pointer. The DIB is not mapped. | 138 // always returns a valid pointer. The DIB is not mapped. |
129 static TransportDIB* CreateWithHandle(Handle handle); | 139 static TransportDIB* CreateWithHandle(Handle handle); |
130 | 140 |
131 // Returns true if the handle is valid. | 141 // Returns true if the handle is valid. |
132 static bool is_valid(Handle dib); | 142 static bool is_valid_handle(Handle dib); |
143 | |
144 // Returns true if the ID refers to a valid dib. | |
145 static bool is_valid_id(Id id); | |
133 | 146 |
134 // Returns a canvas using the memory of this TransportDIB. The returned | 147 // Returns a canvas using the memory of this TransportDIB. The returned |
135 // pointer will be owned by the caller. The bitmap will be of the given size, | 148 // pointer will be owned by the caller. The bitmap will be of the given size, |
136 // which should fit inside this memory. | 149 // which should fit inside this memory. |
137 // | 150 // |
138 // On POSIX, this |TransportDIB| will be mapped if not already. On Windows, | 151 // On POSIX, this |TransportDIB| will be mapped if not already. On Windows, |
139 // this |TransportDIB| will NOT be mapped and should not be mapped prior, | 152 // this |TransportDIB| will NOT be mapped and should not be mapped prior, |
140 // because PlatformCanvas will map the file internally. | 153 // because PlatformCanvas will map the file internally. |
141 // | 154 // |
142 // Will return NULL on allocation failure. This could be because the image | 155 // Will return NULL on allocation failure. This could be because the image |
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169 XID MapToX(Display* connection); | 182 XID MapToX(Display* connection); |
170 #endif | 183 #endif |
171 | 184 |
172 private: | 185 private: |
173 TransportDIB(); | 186 TransportDIB(); |
174 #if defined(OS_WIN) || defined(OS_MACOSX) | 187 #if defined(OS_WIN) || defined(OS_MACOSX) |
175 explicit TransportDIB(base::SharedMemoryHandle dib); | 188 explicit TransportDIB(base::SharedMemoryHandle dib); |
176 base::SharedMemory shared_memory_; | 189 base::SharedMemory shared_memory_; |
177 uint32 sequence_num_; | 190 uint32 sequence_num_; |
178 #elif defined(USE_X11) | 191 #elif defined(USE_X11) |
179 int key_; // SysV shared memory id | 192 Id key_; // SysV shared memory id |
180 void* address_; // mapped address | 193 void* address_; // mapped address |
181 XSharedMemoryId x_shm_; // X id for the shared segment | 194 XSharedMemoryId x_shm_; // X id for the shared segment |
182 Display* display_; // connection to the X server | 195 Display* display_; // connection to the X server |
183 #endif | 196 #endif |
184 size_t size_; // length, in bytes | 197 size_t size_; // length, in bytes |
185 | 198 |
186 DISALLOW_COPY_AND_ASSIGN(TransportDIB); | 199 DISALLOW_COPY_AND_ASSIGN(TransportDIB); |
187 }; | 200 }; |
188 | 201 |
189 #endif // APP_SURFACE_TRANSPORT_DIB_H_ | 202 #endif // APP_SURFACE_TRANSPORT_DIB_H_ |
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