此外,Linux中的Framebuffer模型中,提供了一些ioctl功能,给定一些参数,然后系统可以实现对应的功能,其中有个参数就是FBIOPAN_DISPLAY。具体也就是类似如下调用: ioctl (framebuffer_handler, FBIOPAN_DISPLAY, &variable_info); 而这个调用,如果显示不支持framebuffer的双缓冲的话,那么其framebuffer的缓冲大小,就是和物理...
800线的数据存储于Framebuffer,而实际的显示内容,只是400线,Linux内核中的Framebuffer模型中,对应有个变量yoffset,就是表示的这个具体的纵坐标,默认是0,所以显示的内容就是,0-399线,由于和实际显示页面大小等同,所以此处可以简称为第一帧。如果yoffset改变了,比如此例中变为400,那就是显示剩余的部分,400-799线。...
这样以来,观众就不会看到残缺的画了。这一技术被应用到计算机图形中,称为双缓冲技术。即:在存储器(很有可能是显存)中开辟两块区域,一块作为发送到显示器的数据,一块作为绘画的区域,在适当的时候交换它们。由于交换两块内存区域实际上只需要交换两个指针,这一方法效率非常高,所以被广泛的采用。
awtk-linux-fb 使用 double framebuffer 闪烁的问题 有朋友说 awtk-linux-fb 在某某平台闪烁很厉害,log 显示该平台使用的双帧缓冲。从代码和网上查的资料来看,目前的处理方法没有问题:无非就是通过 FBIOPUT_VSCREENINFO 或 FBIOPAN_DISPLAY 去修改 fb_var_screeninfo 的 yoffset。如: vi.yoffset = i * fb_he...
TouchGFX 4.25 introduces emulated framebuffer (patent pending), which takes significantly less space in memory by breaking the image to be displayed into chunks and using a memory mapping technique that does away with the graphical RAM on the display itself. Consequently, systems that previously ...
doi:US5008838 AKelleher, Brian MHussain, ZahidUSUS5008838 * 1989年11月17日 1991年4月16日 Digital Corporation Method for simultaneous initialization of a double buffer and a frame buffer
In a real-world situation, the framebuffer would likely be larger relative to the cached tiles. One problem with the technique we've shown so far is that a large triangle might thrash the cache if drawn in simple top-to-bottom order, since each horizontal line on the screen might cover ...
This is because the frame buffer is created here, with a need for a substantial block of contiguous RAM. import hardware_setup # Instantiate display, setup color LUT (if present) from gui.core.ugui import Screen, ssd from gui.widgets import Label, Button, CloseButton # from gui.core....
The FRUC library then makes use of NVOFA APIs, advanced CUDA algorithms to produce an interpolated frame and copies it to the output buffer shared by the client application. The client application can create input and output resources using either DirectX APIs or CUDA driver APIs. ‣ Resource...
frame buffer, the message including the graphical image data for two or more pixels on the display device, the graphical image data in the message including intensity data and other data, the processor storing the intensity data for the two or more pixels in the frame buffer in a first set...