vsync

I'm struggling desperately to get Vsync to work in my OpenGL application. Here's the vital stats: I'm using Windows, coding in C++ OpenGL and I'm using FreeGLUT for my OpenGL context (double buffering). I'm aware that for the swap buffer to wait for vertical sync in Windows you are required to call wglSwapIntervalEXT(). My code does call this (as you'll see below), yet I am still getting vertical tearing. The only way I've managed to stop it is by calling glFinish() which of course has a significant performance penalty associated with it. The relevant parts of my main() function look like this

So, Im using D3D in a windowed application. I inited D3D with the following parameters: windowed: true; backbufferformat: D3DFMT_X8R8G8B8; presentinterval: D3DPRESENT_INTERVAL_ONE; swapeffect: DISCARD Each time OnPaint is called, I render the image to the backbuffer and present it to front. As far as I know (and so does MSDN say), once I set D3DPRESENT_INTERVAL_ONE , vsync will work. But in this case, the image is teared when dragging horizontally. (It seems there's a line across the image, image below the line shows on the monitor and the above part follows.) Some sites say D3DPRESENT

I've been playing with pygame (on Debian/Lenny). It seems to work nicely, except for annoying tearing of blits (fullscreen or windowed mode). I'm using the default SDL X11 driver. Googling suggests that it's a known issue with SDL that X11 provides no vsync facility (even with a display created with FULLSCREEN|DOUBLEBUF|HWSURFACE flags), and I should use the "dga" driver instead. However, running SDL_VIDEODRIVER=dga ./mygame.py throws in pygame initialisation with pygame.error: No available video device (despite xdpyinfo showing an XFree86-DGA extension present). So: what's the trick to

With all my SDL/OpenGL programs, the framerate is stuck at 60fps, so looks like the vsync is enable, but not by me, nor in my code or my settings. so i would like to now if there is a way to disable it, maybe in some deep macOS settings? This enabled me to get around ~700 frames per second on my MacBook Pro. Download Graphics Tools for Xcode - Late August 2014 Install or just mount Graphic Tools Open Quartz Debug Go to Tools -> Show Beam Sync Tools Select Disable Beam Synchronization It is not permanent either, perfect for testing/benchmarking. Source Brett Hale Welcome to SO. I outlined an

//ViewRootImpl @Override public void requestLayout() { if (!mHandlingLayoutInLayoutRequest) { checkThread(); //检查是否在主线程 mLayoutRequested = true ; //mLayoutRequested 是否measure和layout布局。 scheduleTraversals(); } } void scheduleTraversals() { if (!mTraversalScheduled) { //同一帧内不会多次调用遍历 mTraversalScheduled = true ; mTraversalBarrier = mHandler.getLooper().getQueue().postSyncBarrier(); //拦截同步Message //探索的入口 mChoreographer.postCallback( Choreographer.CALLBACK_TRAVERSAL, mTraversalRunnable, null ); } } final class TraversalRunnable implements Runnable { @Override public void run() { doTraversal(); } }

I work on a 2D shooter game with lots of moving objects on the screen (bullets etc). I use BitmapData.copyPixels(...) to render entire screen to a buffer:BitmapData. Then I "copyPixels" from "buffer" to screen:BitmapData. The framerate is 60. private var bitmap:Bitmap = new Bitmap(); private var buffer:Bitmap = new Bitmap(); private function start():void { addChild(bitmap); } private function onEnterFrame():void { // render into "buffer" // copy "buffer" -> "bitmap" } The problem is that the sprites are tearing apart: some part of a sprite got shifted horizontally. It looks like a PC game with

来源： https://blog.csdn.net/cbwang512/article/details/100015954