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    • 6. 发明授权
    • Method and apparatus for managing changes in a virtual screen buffer
    • 用于管理虚拟屏幕缓冲器中的变化的方法和装置
    • US07403204B2
    • 2008-07-22
    • US11209897
    • 2005-08-23
    • Theodore F. EmersonRobert L. NoonanDavid F. HeinrichDon Dykes
    • Theodore F. EmersonRobert L. NoonanDavid F. HeinrichDon Dykes
    • G09G5/36
    • G06F3/1454G06F3/1462G06F11/2294G09G2340/02H04L1/0061H04L1/0072H04L2001/0094H04N19/132H04N19/137H04N19/164H04N19/174H04N19/176H04N19/42H04N19/436H04N19/507H04N21/4334H04N21/6332
    • A remote management controller may include a capture engine and a processor. The capture engine may be configured to: obtain a slice of video data output from a video graphics controller; calculate at least one value correlative to the slice of video data; determine whether any portion of the slice has been locked; and if any portion has not been locked and if the calculated value for such portion of the slice differs from a value for a previously obtained corresponding portion, move the portion to a virtual screen buffer, update a table associated with the virtual screen buffer with the calculated value, and modify a change table to indicate that the portion has changed. The processor may be configured to: read the change table to determine whether any portion of video data in the virtual screen buffer has changed; and if any portion has changed, lock any changed portion from being accessed by the capture engine, access the changed portion from the virtual screen buffer, and process the changed portion in the virtual screen buffer for transmission to a remote system.
    • 远程管理控制器可以包括捕获引擎和处理器。 捕获引擎可以被配置为:获得从视频图形控制器输出的视频数据片; 计算与视频数据片段相关的至少一个值; 确定切片的任何部分是否已被锁定; 并且如果任何部分没有被锁定,并且如果切片的这个部分的计算值与先前获得的对应部分的值不同,则将部分移动到虚拟屏幕缓冲器,用与虚拟屏幕缓冲器相关联的表更新 计算值,并修改更改表以指示该部分已更改。 处理器可以被配置为:读取更改表以确定虚拟屏幕缓冲器中的视频数据的任何部分是否已经改变; 并且如果任何部分已经改变,则锁定任何改变的部分不被捕获引擎访问,从虚拟屏幕缓冲器访问改变的部分,并处理虚拟屏幕缓冲器中的改变的部分以传输到远程系统。