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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 #include "ui/surface/transport_dib.h" | 5 #include "ui/surface/transport_dib.h" |
6 | 6 |
7 #include <windows.h> | 7 #include <windows.h> |
8 | 8 |
9 #include <limits> | 9 #include <limits> |
10 | 10 |
11 #include "base/logging.h" | 11 #include "base/logging.h" |
12 #include "base/memory/scoped_ptr.h" | 12 #include "base/memory/scoped_ptr.h" |
13 #include "base/sys_info.h" | 13 #include "base/sys_info.h" |
14 #include "skia/ext/platform_canvas.h" | 14 #include "skia/ext/platform_canvas.h" |
15 | 15 |
16 TransportDIB::TransportDIB() | 16 TransportDIB::TransportDIB() |
17 : size_(0) { | 17 : size_(0) { |
18 } | 18 } |
19 | 19 |
20 TransportDIB::~TransportDIB() { | 20 TransportDIB::~TransportDIB() { |
21 } | 21 } |
22 | 22 |
23 TransportDIB::TransportDIB(HANDLE handle) | 23 TransportDIB::TransportDIB(base::SharedMemoryHandle handle) |
24 : shared_memory_(handle, false /* read write */), | 24 : shared_memory_(handle, false /* read write */), size_(0) {} |
25 size_(0) { | |
26 } | |
27 | 25 |
28 // static | 26 // static |
29 TransportDIB* TransportDIB::Create(size_t size, uint32 sequence_num) { | 27 TransportDIB* TransportDIB::Create(size_t size, uint32 sequence_num) { |
30 TransportDIB* dib = new TransportDIB; | 28 TransportDIB* dib = new TransportDIB; |
31 | 29 |
32 if (!dib->shared_memory_.CreateAnonymous(size)) { | 30 if (!dib->shared_memory_.CreateAnonymous(size)) { |
33 delete dib; | 31 delete dib; |
34 return NULL; | 32 return NULL; |
35 } | 33 } |
36 | 34 |
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48 return dib.release(); | 46 return dib.release(); |
49 } | 47 } |
50 | 48 |
51 // static | 49 // static |
52 TransportDIB* TransportDIB::CreateWithHandle(Handle handle) { | 50 TransportDIB* TransportDIB::CreateWithHandle(Handle handle) { |
53 return new TransportDIB(handle); | 51 return new TransportDIB(handle); |
54 } | 52 } |
55 | 53 |
56 // static | 54 // static |
57 bool TransportDIB::is_valid_handle(Handle dib) { | 55 bool TransportDIB::is_valid_handle(Handle dib) { |
58 return dib != NULL; | 56 return dib.IsValid(); |
59 } | 57 } |
60 | 58 |
61 skia::PlatformCanvas* TransportDIB::GetPlatformCanvas(int w, int h) { | 59 skia::PlatformCanvas* TransportDIB::GetPlatformCanvas(int w, int h) { |
62 // This DIB already mapped the file into this process, but PlatformCanvas | 60 // This DIB already mapped the file into this process, but PlatformCanvas |
63 // will map it again. | 61 // will map it again. |
64 DCHECK(!memory()) << "Mapped file twice in the same process."; | 62 DCHECK(!memory()) << "Mapped file twice in the same process."; |
65 | 63 |
66 // We can't check the canvas size before mapping, but it's safe because | 64 // We can't check the canvas size before mapping, but it's safe because |
67 // Windows will fail to map the section if the dimensions of the canvas | 65 // Windows will fail to map the section if the dimensions of the canvas |
68 // are too large. | 66 // are too large. |
69 skia::PlatformCanvas* canvas = | 67 skia::PlatformCanvas* canvas = skia::CreatePlatformCanvas( |
70 skia::CreatePlatformCanvas(w, h, true, shared_memory_.handle(), | 68 w, h, true, shared_memory_.handle().GetHandle(), |
71 skia::RETURN_NULL_ON_FAILURE); | 69 skia::RETURN_NULL_ON_FAILURE); |
72 | 70 |
73 // Calculate the size for the memory region backing the canvas. | 71 // Calculate the size for the memory region backing the canvas. |
74 if (canvas) | 72 if (canvas) |
75 size_ = skia::PlatformCanvasStrideForWidth(w) * h; | 73 size_ = skia::PlatformCanvasStrideForWidth(w) * h; |
76 | 74 |
77 return canvas; | 75 return canvas; |
78 } | 76 } |
79 | 77 |
80 bool TransportDIB::Map() { | 78 bool TransportDIB::Map() { |
81 if (!is_valid_handle(shared_memory_.handle())) | 79 if (!is_valid_handle(shared_memory_.handle())) |
82 return false; | 80 return false; |
83 if (memory()) | 81 if (memory()) |
84 return true; | 82 return true; |
85 | 83 |
86 if (!shared_memory_.Map(0 /* map whole shared memory segment */)) { | 84 if (!shared_memory_.Map(0 /* map whole shared memory segment */)) { |
87 LOG(ERROR) << "Failed to map transport DIB" | 85 LOG(ERROR) << "Failed to map transport DIB" |
88 << " handle:" << shared_memory_.handle() | 86 << " handle:" << shared_memory_.handle().GetHandle() |
89 << " error:" << ::GetLastError(); | 87 << " error:" << ::GetLastError(); |
90 return false; | 88 return false; |
91 } | 89 } |
92 | 90 |
93 size_ = shared_memory_.mapped_size(); | 91 size_ = shared_memory_.mapped_size(); |
94 return true; | 92 return true; |
95 } | 93 } |
96 | 94 |
97 void* TransportDIB::memory() const { | 95 void* TransportDIB::memory() const { |
98 return shared_memory_.memory(); | 96 return shared_memory_.memory(); |
99 } | 97 } |
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