pandora buffering

The so-called double buffering is a task of two threads simultaneously. The game uses double buffering mainly to solve the problem of drawing flickering and improve the drawing efficiency. When surfaceview is used for drawing, the area of the drawing will be locked. That is to say, this area can be used for drawing next time only after the drawing is completed, however, when drawing a picture, we often need

Simple page buffering technology (1 ). The preface is actually a technology, maybe not a real technology. This is just a page processing method I have come up with. of course, it may be consistent with others' ideas. However, I would also like to explain It is actually a technology, maybe not a real technology. This is just a page processing method I have come up with. of course, it may be consistent with others' ideas. But I still want to give it a n

I haven't written a double cache for a long time, so I'll review it when I'm free.We often hear about double caches, but we seldom use multiple caches, at least in most cases. Why not need multi-buffering, today under analysis. Not as many buffers as possible, this needs to be considered for specific application scenarios. We assume that the application scenario, in order to simplify the scenario, assume that there is only one read thread and a write

First, the template bufferThere are two types of actions associated with template buffering-comparison and update operations.1. Compare operationsStencil Test compares the values in reference and stencil buffer with the following formula:(stencil Ref \ mask) OP (stencil Buffer \ mask)//left and right order not reversedThe corresponding commands in DX and OpenGL are:Glstencil (Cmp_fun, ref, Mask) and Device->setrenderstate (D3drs_stencilfunc, Cmp_fun)O

Many comrades in the QT program will meet the splash screen problem, sometimes very fast, but after all, the impact of the display effect, how to reduce the screen jitter or splash screen it?I have tried the following ways:1. Use double buffering. For example, if we draw multiple graphs in a widget, we first create a Qpixmap object and then use Qpainter to draw on the Qpixmap object, and then copy the data to the active Painterdev using the BitBlt.2.Q

Simple page buffering technology (1) (reposted to Chinese users ). The preface is actually a technology, maybe not a real technology. This is just a page processing method I have come up with. of course, it may be consistent with others' ideas. However, I would also like to explain It is actually a technology, maybe not a real technology. This is just a page processing method I have come up with. of course, it may be consistent with others' ideas. But

, adjust the buffer size The PHP Accelerator provides buffer management commands: PHPA_CACHE_ADMIN-MV observe the buffer of memory PHPA_CACHE_ADMIN-FV observing the buffering of files Phpa_cache_admin-k Setting the buffer size V. Summary The INSTALL file provided by the software describes some of the performance statements, the author does not repeat here. It should be explained that freelamp.com's article is not currently PHP architecture, but the fo

This article mainly introduces, the interested friend's reference, hoped to be helpful to everybody. When it comes to buffering, which is buffer, it has to be compared with the cache, and simply comparing the definitions is meaningless, as if to see what they do. The cache solves the problem of how to quickly find the exploit data and save CPU consumption, while the buffer solves the issue that the high-speed CPU does not match the low-speed I/O devi

Original link: http://blog.csdn.net/clodfront/article/details/5488648Why use double buffering to drawWhen you are plotting multiple primitives:Because it is to be a picture, so each drawing an entity, the system will do a graphical drawing operation, the graphic redraw is very resource-intensive, especially when the number of graphics need to redraw a lot of time, the resulting consumption is particularly large, resulting in flashing, not smooth and s

1. What is double buffering technology? The dual-buffer technology means that after the user operation interface is complete, a buffer zone will be provided to save the user operation results. Why is dual-buffer technology used? For Android game development, the UI is all re-painted every time, so it is said that there is a new image, and the old one is gone, so we need to use the dual-buffer technology to save the previous content. How to implement d

The following is a description of the OB function buffer mechanism in PHP in the form of text and code analysis to show you the following: For a newly-started PHP programmer, the PHP buffer is almost transparent. In their mind, an echo print_r function , the data will be ' swish ' a sound to fly to the browser, displayed. I have always been so simple to think. In fact, in the world of technology, has always been from simple to complex, perhaps those technical developers began to be just like yo

Flickering occurs when you use the canvas component to refresh the display of pictures or drawings. This is because the mechanism is to first use the background color to overwrite the original content, and then draw new content to the above caused by. The flicker we see is the alternating display between the background color and the new content.The following is the code for the update () method in the canvaspublic void Update (Graphics g) {g.clearrect (0, 0, width, height);Paint (g); }As can be

Using WTL's Cdoublebufferimpl class makes it easy to implement double buffering without having to implement cumbersome code yourself, not only to draw a general window, but also to draw the background of a dialog box. First #include Secondly, the class needing double buffering drawing should derive from CdoublebufferimplClass Cmaindlg:public CdialogimplThen the message chain joins BEGIN_MSG_MAP_EX (CMAIND

first code, the reason we don't output as expected is because the output_buffering buffers the output. The output will not be sent out until the 4096bytes is reached or the script is finished. and the role of Ob_end_clean () and Ob_end_flush () in the second paragraph of the code is to terminate the buffer. This doesn't have to wait until a 4096bytes buffer is sent out. in the third code, a Ob_flush () is used to send the buffered data, but it does not terminate the buffer, so it must be used

buffer size of 4096bytes. In our first code, the output is not as expected because the output_buffering buffers the output. The output will not be sent out until the 4096bytes is reached or the script is finished. The function of Ob_end_clean () and Ob_end_flush () in the second code is to terminate the buffer. This doesn't have to wait until a 4096bytes buffer is sent out. In the third code, a Ob_flush () is used to send the buffered data, but it does not terminate the buffer, so it must be

necessary and impossible. Buffering is because the next access may be exactly the same as the previous access. So it's not appropriate for pages that are constantly changing. For example, the page to display the count information is not appropriate. Also is if your dynamic page output, not first output to the variable, but directly back to the user, such as the use of Echo,print, ReadFile and so on output, I personally think that is still not done. B

Button | control | Filter a buffer image with the effect of switching, button control, add a blur filter, improve the sense of speed. The source file is attached. Here is the code: Stop (); Also name-_-,///////time of day November 18, 2006 var sz = 127; var sd = 3; var temp = 1; tempt = temp; T1 = "Button control buffering: Picture switching with buffering effect. "; McX = mc._x; Xfmc._visible = false; if

. than the excessive distortion level Again, double buffering technology: When the form is refreshed, there is always a process to erase the original image OnEraseBkgnd, which fills the form plot area with the background color and then redraws it by invoking a new drawing code so that the color of the image is contrasted by a wipe. When WM_PAINT's response is frequent, the contrast is becoming more pronounced. So we saw a flicker. Avoiding background

SQL Server ring buffers (ring buffer)--loop buffering in AlwaysOn applicationsYou can get some diagnostic AlwaysOn information from the SQL Server ring buffer, or dynamically manage views from sys.dm_os_ring_buffers. The ring buffer is created when SQL Server starts and records alarms within the SQL Server System for internal diagnostics. They are not supported, but you can still get useful information from them. The following query can get all the ev

the content displayed by the view component can be saved as bitmap through the cache mechanism, mainly in the following ways:void setdrawingcacheenabled (Boolean flag), Bitmap getdrawingcache (boolean Autoscale), void Builddrawingcache (boolean Autoscale), void destroydrawingcache ()we need to get the cache first by using the Setdrawingcacheenable method to open the cache and then call the Getdrawingcache method to get the cache image of the view. the Builddrawingcache method can not be c