gpu/GLES2/extensions/CHROMIUM/CHROMIUM_sync_point.txt - Issue 362863002: Add future sync point methods to ContextSupport.

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Issue 362863002: Add future sync point methods to ContextSupport. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src

Patch Set: Created 6 years, 5 months ago

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1 Name	1 Name

2	2

3 CHROMIUM_sync_point	3 CHROMIUM_sync_point

4	4

5 Name Strings	5 Name Strings

6	6

7 GL_CHROMIUM_sync_point	7 GL_CHROMIUM_sync_point

8	8

9 Version	9 Version

10	10

11 Last Modifed Date: February 25, 2013	11 Last Modifed Date: July 1, 2014

12	12

13 Dependencies	13 Dependencies

14	14

15 OpenGL ES 2.0 is required.	15 OpenGL ES 2.0 is required.

16	16

17 Overview	17 Overview

18	18

19 This extension allows a client to order operations between contexts.	19 This extension allows a client to order operations between contexts.

20	20

21 This extension implements a small subset of ARB_sync, with weaker	21 This extension implements a small subset of ARB_sync, with weaker

(...skipping 19 matching lines...) Expand all Loading...
41 uint InsertSyncPointCHROMIUM()	41 uint InsertSyncPointCHROMIUM()

42	42

43 creates a sync point and inserts it into the stream of commands for the	43 creates a sync point and inserts it into the stream of commands for the

44 current context. The sync point acts as a fence, which is signaled when	44 current context. The sync point acts as a fence, which is signaled when

45 previous commands have been submitted to the server, or when the context is	45 previous commands have been submitted to the server, or when the context is

46 destroyed, whichever happens first. The sync point name is returned. The	46 destroyed, whichever happens first. The sync point name is returned. The

47 sync point is implicitly deleted when it becomes signaled. The sync point	47 sync point is implicitly deleted when it becomes signaled. The sync point

48 namespace is shared between all contexts on the same server, including other	48 namespace is shared between all contexts on the same server, including other

49 context groups.	49 context groups.

50	50

	51 The command

	52

	53 uint InsertFutureSyncPointCHROMIUM()

	54

	55 creates a sync point, but does not insert it into the stream of commands.

	56 The returned sync point name can be waited on immediately, but will not be

	57 signalled until a retire command is sent, or until the context is

	58 destroyed, whichever happens first. This command may only be permitted if

	59 a context is "trusted", which is defined by the implementation.
	piman 2014/07/11 22:24:32 nit: could we add a static query, or an extension nit: could we add a static query, or an extension string (e.g. CHROMIUM_sync_point_trusted) so that the client can test it?
51	60

52 The command	61 The command

53	62

	63 void RetireSyncPointCHROMIUM(uint sync_point)

	64

	65 causes a sync point to be signaled as soon as the previous commands have

	66 been submitted to the server. The sync point named <sync_point> must have

	67 been returned by InsertFutureSyncPointCHROMIUM. The sync point name will

	68 be implicitly deleted when it becomes signaled. This command may only be

	69 permitted if a context is "trusted", which is defined by the

	70 implementation.

	71

	72 The command

	73

54 void WaitSyncPointCHROMIUM(uint sync_point)	74 void WaitSyncPointCHROMIUM(uint sync_point)

55	75

56 causes the current context to stop submitting commands until the specified	76 causes the current context to stop submitting commands until the specified

57 sync point becomes signaled. This is implemented as a server-side wait.	77 sync point becomes signaled. This is implemented as a server-side wait.

58 <sync_point> is the name of the sync point to wait for. If <sync_point>	78 <sync_point> is the name of the sync point to wait for. If <sync_point>

59 isn't a valid sync point returned by InsertSyncPointCHROMIUM, or if the sync	79 isn't a valid sync point returned by InsertSyncPointCHROMIUM, or if the sync

60 point has already been deleted, the command is equivalent to a no-op and no	80 point has already been deleted, the command is equivalent to a no-op and no

61 error is generated.	81 error is generated.

62	82

63 Errors	83 Errors

64	84

65 None.	85 None.

66	86

67 New State	87 New State

68	88

69 None.	89 None.

70	90

71 Revision History	91 Revision History

72	92

	93 7/1/2014 Added future sync points.

73 2/25/2013 Documented the extension	94 2/25/2013 Documented the extension

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