WebC++ 在OpenGL中从默认帧缓冲区读取像素数据：FBO与PBO的性能,c++,opengl,C++,Opengl,我的目标是读取默认OpenGL帧缓冲区的内容，并将像素数据存储在cv:：Mat中。 显然，实现这一目标有两种不同的方法： 1） 同步：使用FBO和glRealPixels cv::Mat a = cv::Mat::zeros (cv::Size (1920, 1080), CV_8UC3); glReadPixels (0, 0, 1920, … Web我正在開發一個需要訪問OpenGL ES 2.0紋理像素的Android NDK應用程序。 OpenGL擴展允許執行此操作，如此處 ， 此處和此處所述 。 所有這些方法都需要使用不是 NDK一部分的GraphicBuffer類（參見例如此處 ）。 顯然，這需要訪問私有C ++ Android API（來自AOSP-Android開源項目）。
opengl - CUDA GL互操作-從另一個進程讀取映射的緩沖區紋理
WebApr 28, 2015 · The idea behind PBOs is, that you can do data transfers and texture image specification "in the background", while the GPU is busy drawing stuff. So to actually benefit from PBO-ed uploads you must make your program to operate asynchronously. Share Improve this answer Follow answered Apr 28, 2015 at 22:41 datenwolf 158k 12 184 294 Web我想调用它的函数来渲染到Opengl PBO内存中（或者更简单） 现在，我首先使用（分配自己的内存）创建一个HBITMAP，然后将其复制到我的PBO内存中。然而，我想避免这额 … covered all
c++ - Error mapping PBO cudaGraphicsResource - Stack Overflow
WebMay 26, 2011 · I think after calling glTexImage you are safe in deleting or reusing the buffer without errors, as the driver handles everything for you, including deferred destruction (that's the advantage of buffer objects). But this means, that calls to glMapBuffer may block until the preceding glTexImage copy has completed. If you want to reuse the buffer and just … WebApr 18, 2014 · Code of interest: // bind PBO to update pixel values glBindBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB, pboIds [nextIndex]); // map the buffer object into client's memory // Note that glMapBufferARB () causes sync issue. // If GPU is working with this buffer, glMapBufferARB () will wait (stall) // for GPU to finish its job. WebThe OpenGL extension, GL_ARB_framebuffer_objectprovides an interface to create additional non-displayable framebuffer objects (FBO). This framebuffer is called application-createdframebuffer in order to … covered alabama