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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 // This file contains the command buffer helper class. | 5 // This file contains the command buffer helper class. |
6 | 6 |
7 #ifndef GPU_COMMAND_BUFFER_CLIENT_CMD_BUFFER_HELPER_H_ | 7 #ifndef GPU_COMMAND_BUFFER_CLIENT_CMD_BUFFER_HELPER_H_ |
8 #define GPU_COMMAND_BUFFER_CLIENT_CMD_BUFFER_HELPER_H_ | 8 #define GPU_COMMAND_BUFFER_CLIENT_CMD_BUFFER_HELPER_H_ |
9 | 9 |
10 #include <string.h> | 10 #include <string.h> |
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25 // | 25 // |
26 // helper.AddCommand(...); | 26 // helper.AddCommand(...); |
27 // helper.AddCommand(...); | 27 // helper.AddCommand(...); |
28 // int32 token = helper.InsertToken(); | 28 // int32 token = helper.InsertToken(); |
29 // helper.AddCommand(...); | 29 // helper.AddCommand(...); |
30 // helper.AddCommand(...); | 30 // helper.AddCommand(...); |
31 // [...] | 31 // [...] |
32 // | 32 // |
33 // helper.WaitForToken(token); // this doesn't return until the first two | 33 // helper.WaitForToken(token); // this doesn't return until the first two |
34 // // commands have been executed. | 34 // // commands have been executed. |
35 class GPU_EXPORT CommandBufferHelper { | 35 class GPU_EXPORT CommandBufferHelper { |
reveman
2014/01/02 01:31:29
What if we enumerate all internal queries and add
jadahl
2014/01/02 10:59:54
When would we WaitForQuery? In the current impleme
reveman
2014/01/02 11:56:44
Maybe we wouldn't block on queries when trying to
jadahl
2014/01/03 14:13:28
Thinking about tear down, is it really needed to w
piman
2014/01/08 05:08:04
I would prefer if GL concepts didn't leak into Com
reveman
2014/01/08 05:56:21
Makes sense. What if we just call this sequence nu
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36 public: | 36 public: |
37 explicit CommandBufferHelper(CommandBuffer* command_buffer); | 37 explicit CommandBufferHelper(CommandBuffer* command_buffer); |
38 virtual ~CommandBufferHelper(); | 38 virtual ~CommandBufferHelper(); |
39 | 39 |
40 // Initializes the CommandBufferHelper. | 40 // Initializes the CommandBufferHelper. |
41 // Parameters: | 41 // Parameters: |
42 // ring_buffer_size: The size of the ring buffer portion of the command | 42 // ring_buffer_size: The size of the ring buffer portion of the command |
43 // buffer. | 43 // buffer. |
44 bool Initialize(int32 ring_buffer_size); | 44 bool Initialize(int32 ring_buffer_size); |
45 | 45 |
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76 | 76 |
77 // Inserts a new token into the command buffer. This token either has a value | 77 // Inserts a new token into the command buffer. This token either has a value |
78 // different from previously inserted tokens, or ensures that previously | 78 // different from previously inserted tokens, or ensures that previously |
79 // inserted tokens with that value have already passed through the command | 79 // inserted tokens with that value have already passed through the command |
80 // stream. | 80 // stream. |
81 // Returns: | 81 // Returns: |
82 // the value of the new token or -1 if the command buffer reader has | 82 // the value of the new token or -1 if the command buffer reader has |
83 // shutdown. | 83 // shutdown. |
84 int32 InsertToken(); | 84 int32 InsertToken(); |
85 | 85 |
86 // Returns true if the token has already passed. | |
87 // Parameters: | |
88 // the value of the token to check whether it has passed | |
89 bool HasTokenPassed(int32 token); | |
reveman
2014/01/02 01:31:29
why is this needed in addition to last_token_read(
jadahl
2014/01/02 10:59:54
No need. Will remove. No idea why I added it herei
epennerAtGoogle
2014/01/07 00:47:59
Just FYI, I actually like this (as an inline funct
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90 | |
86 // Waits until the token of a particular value has passed through the command | 91 // Waits until the token of a particular value has passed through the command |
87 // stream (i.e. commands inserted before that token have been executed). | 92 // stream (i.e. commands inserted before that token have been executed). |
88 // NOTE: This will call Flush if it needs to block. | 93 // NOTE: This will call Flush if it needs to block. |
89 // Parameters: | 94 // Parameters: |
90 // the value of the token to wait for. | 95 // the value of the token to wait for. |
91 void WaitForToken(int32 token); | 96 void WaitForToken(int32 token); |
92 | 97 |
93 // Called prior to each command being issued. Waits for a certain amount of | 98 // Called prior to each command being issued. Waits for a certain amount of |
94 // space to be available. Returns address of space. | 99 // space to be available. Returns address of space. |
95 CommandBufferEntry* GetSpace(uint32 entries); | 100 CommandBufferEntry* GetSpace(uint32 entries); |
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261 // Using C runtime instead of base because this file cannot depend on base. | 266 // Using C runtime instead of base because this file cannot depend on base. |
262 clock_t last_flush_time_; | 267 clock_t last_flush_time_; |
263 | 268 |
264 friend class CommandBufferHelperTest; | 269 friend class CommandBufferHelperTest; |
265 DISALLOW_COPY_AND_ASSIGN(CommandBufferHelper); | 270 DISALLOW_COPY_AND_ASSIGN(CommandBufferHelper); |
266 }; | 271 }; |
267 | 272 |
268 } // namespace gpu | 273 } // namespace gpu |
269 | 274 |
270 #endif // GPU_COMMAND_BUFFER_CLIENT_CMD_BUFFER_HELPER_H_ | 275 #endif // GPU_COMMAND_BUFFER_CLIENT_CMD_BUFFER_HELPER_H_ |
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