gop | 游戏运营平台 Game Operating Platform | Game Engine library

Well, here a code solution ( working on virtualbox ) to locate the graphical output protocol with the r_efi crate :

The problem is in this line in your update_figure4 callback (inside the else statement):

How can I Implement It in My OS?

The first step is to determine the pixel geometry (see https://en.wikipedia.org/wiki/Pixel_geometry ); because if you don't know that any attempt at sub-pixel rendering is likely to just make the image worse than not doing sub-pixel rendering at all. I've never been able to find a sane way to obtain this information. A "least insane" way is to get the monitor's EDID/E-EDID (Extended Display Identification Data - see https://en.wikipedia.org/wiki/Extended_Display_Identification_Data ), extract the manufacturer and product code, and then use manufacturer and product code to find the information somewhere elsewhere (from a file, from a database, ..). Sadly this means that you'll have to create all the information needed for all monitors you support (and fall back to "sub-pixel rendering disabled" for unknown monitors).

Note: As an alternative; you can let the user set the pixel geometry; but most users won't know and won't want the hassle, and the rest of users will set it wrong, so...

The second step is the make sure you're using the monitor's preferred resolution; because if you're not then the monitor will probably be scaling your image to make it fit and that will destroy any benefit of sub-pixel rendering. To do this you want to obtain and parse the monitors EDID or E-EDID data and try to determine the preferred resolution; then use the preferred resolution when setting the video mode. Unfortunately some monitors (mostly old stuff) either won't tell you the preferred resolution or won't have a preferred resolution; and if you can determine the preferred resolution you might not be able to set that video mode with VBE (on BIOS) or GOP or UGA (on UEFI), and writing native video drivers is "not without further problems".

The third step is the actual rendering; but that depends on how you're rendering what.

For advanced rendering (capable of 3D - textured polygons, etc) it's easiest to think of it as rendering separate monochrome images (e.g. one for red, one for green, one for blue) with a slight shift in the camera's position to reflect the pixel geometry. For example, if the pixel geometry is "3 vertical bars, with red on the left of the pixel, green in the middle and blue on the right" then when rendering the red monochrome image you'd shift the camera slightly to the left (by about a third of a pixel). However, this almost triples the cost of rendering.

If you're only doing sub-pixel rendering for fonts then it's the same basic principle in a much more limited setting (when rendering fonts to a texture/bitmap and not when rendering anything to the screen). In this case, if you cache the resulting pixel data and recycle it (which you'll want to do anyway) it can have minimal overhead. This requires that the text being rendered is aligned to a pixel grid (and not scaled in any way, or at abitrary angles, or stuck onto the side of a spinning 3D teapot, or anything like that).

I finally got it working by inverting the MSI-X table structure found on osdev.org. I decided to completely reinitialize the xHC after leaving the UEFI environment as it could leave it in an unknown state. Here's the xHCI code for anyone wondering the same thing as me:

You won't be able to do this with appsink and appsrc, as these are explicitly meant to be used by an application to handle the input/output buffers.

That being said, if what you really want is to test the caps on both sides, just connect them together. They both advertise "ANY" caps, which means they won't really influence the caps negotiation.

RTCIceCandidatePairStats.currentRoundTripTime is computed by how long it takes for the remote peer to respond to STUN Binding Request. The WebRTC ICE Agent sends these on an interval, and each messages has a TransactionID.

RTCRemoteInboundRtpStreamStats.currentRoundTripTime is computed by how long since the last SenderReport has been received. The sender knows when it sent, so it is able to compute how long it took to arrive.

They are both accurate. Personally I use the ICE stats since there is less overhead. The packet doesn't have to be decrypted and routed through the RTCP subsystem. IMO ICE is also easier to deal with then RTCP.

What is the size of the length of GOP in the Webrtc VP8 codec?. It depends on what is being encoded and the settings. Do you have a low keyframe interval? Are you encoding something with lots of changes? What are you trying to determine with this question?

Took me a little while but... I've got two different versions for you: one with VBA and one with just formulas.

With VBA

The issue you had was that VLOOKUP returns the first match but you needed to satisfy two criteria (that is: (i) match on entity id and (ii) match on source id begins with "WS").

This meant that you either had to:

1. use a formula that could match both criteria at the same time, OR
2. find all matches with the first criteria (e.g. with FIND) and then loop through the results to match the second criteria -- probably something like this: https://www.thespreadsheetguru.com/the-code-vault/2014/4/21/find-all-instances-with-vba

I selected option #1 as I expected it would make the code shorter.

To do this, I took advantage of a trick I've used in formulas before where I can use "&" between two ranges to match on two criteria at the same time. So, instead of matching "HR0012" first and then "WS-something" second, I match "HR0012WS-something" at once. (You can view this concept by pasting =A2:A20&B2:B20 in an empty column somewhere in your entity sheet.)

The following code assumes that your active worksheet is your working sheet. Paste this code behind your working sheet, then run it when you have that sheet open.

When you aggregate the nodes, it will not remove duplicates so adding the keyword "distinct" will fix it. Instead of COLLECT(o), use COLLECT(DISTINCT o) as opponents and COLLECT(DISTINCT ops).