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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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 UI_SURFACE_TRANSPORT_DIB_H_ | 5 #ifndef UI_SURFACE_TRANSPORT_DIB_H_ |
6 #define UI_SURFACE_TRANSPORT_DIB_H_ | 6 #define UI_SURFACE_TRANSPORT_DIB_H_ |
7 | 7 |
8 #include "base/basictypes.h" | 8 #include <stddef.h> |
| 9 #include <stdint.h> |
| 10 |
| 11 #include "base/macros.h" |
9 #include "base/memory/shared_memory.h" | 12 #include "base/memory/shared_memory.h" |
| 13 #include "build/build_config.h" |
10 #include "ui/surface/surface_export.h" | 14 #include "ui/surface/surface_export.h" |
11 | 15 |
12 #if defined(OS_WIN) | 16 #if defined(OS_WIN) |
13 #include <windows.h> | 17 #include <windows.h> |
14 #endif | 18 #endif |
15 | 19 |
16 class SkCanvas; | 20 class SkCanvas; |
17 | 21 |
18 // ----------------------------------------------------------------------------- | 22 // ----------------------------------------------------------------------------- |
19 // A TransportDIB is a block of memory that is used to transport pixels | 23 // A TransportDIB is a block of memory that is used to transport pixels |
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36 | 40 |
37 // Create a new TransportDIB, returning NULL on failure. | 41 // Create a new TransportDIB, returning NULL on failure. |
38 // | 42 // |
39 // The size is the minimum size in bytes of the memory backing the transport | 43 // The size is the minimum size in bytes of the memory backing the transport |
40 // DIB (we may actually allocate more than that to give us better reuse when | 44 // DIB (we may actually allocate more than that to give us better reuse when |
41 // cached). | 45 // cached). |
42 // | 46 // |
43 // The sequence number is used to uniquely identify the transport DIB. It | 47 // The sequence number is used to uniquely identify the transport DIB. It |
44 // should be unique for all transport DIBs ever created in the same | 48 // should be unique for all transport DIBs ever created in the same |
45 // renderer. | 49 // renderer. |
46 static TransportDIB* Create(size_t size, uint32 sequence_num); | 50 static TransportDIB* Create(size_t size, uint32_t sequence_num); |
47 | 51 |
48 // Map the referenced transport DIB. The caller owns the returned object. | 52 // Map the referenced transport DIB. The caller owns the returned object. |
49 // Returns NULL on failure. | 53 // Returns NULL on failure. |
50 static TransportDIB* Map(Handle transport_dib); | 54 static TransportDIB* Map(Handle transport_dib); |
51 | 55 |
52 // Create a new |TransportDIB| with a handle to the shared memory. This | 56 // Create a new |TransportDIB| with a handle to the shared memory. This |
53 // always returns a valid pointer. The DIB is not mapped. | 57 // always returns a valid pointer. The DIB is not mapped. |
54 static TransportDIB* CreateWithHandle(Handle handle); | 58 static TransportDIB* CreateWithHandle(Handle handle); |
55 | 59 |
56 // Returns true if the handle is valid. | 60 // Returns true if the handle is valid. |
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85 base::SharedMemory* shared_memory(); | 89 base::SharedMemory* shared_memory(); |
86 | 90 |
87 private: | 91 private: |
88 TransportDIB(); | 92 TransportDIB(); |
89 | 93 |
90 // Verifies that the dib can hold a canvas of the requested dimensions. | 94 // Verifies that the dib can hold a canvas of the requested dimensions. |
91 bool VerifyCanvasSize(int w, int h); | 95 bool VerifyCanvasSize(int w, int h); |
92 | 96 |
93 explicit TransportDIB(base::SharedMemoryHandle dib); | 97 explicit TransportDIB(base::SharedMemoryHandle dib); |
94 base::SharedMemory shared_memory_; | 98 base::SharedMemory shared_memory_; |
95 uint32 sequence_num_; | 99 uint32_t sequence_num_; |
96 size_t size_; // length, in bytes | 100 size_t size_; // length, in bytes |
97 | 101 |
98 DISALLOW_COPY_AND_ASSIGN(TransportDIB); | 102 DISALLOW_COPY_AND_ASSIGN(TransportDIB); |
99 }; | 103 }; |
100 | 104 |
101 #endif // UI_SURFACE_TRANSPORT_DIB_H_ | 105 #endif // UI_SURFACE_TRANSPORT_DIB_H_ |
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