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c++ Programming Glossary: glreadpixelsHow to render offscreen on OpenGL? [duplicate] http://stackoverflow.com/questions/12157646/how-to-render-offscreen-on-opengl screen share improve this question It all starts with glReadPixels which you will use to transfer the pixels stored in a specific.. std uint8_t data width height 4 glReadBuffer GL_BACK glReadPixels 0 0 width height GL_BGRA GL_UNSIGNED_BYTE data 0 This will read.. data width height 4 glReadBuffer GL_COLOR_ATTACHMENT0 glReadPixels 0 0 width height GL_BGRA GL_UNSIGNED_BYTE data 0 Return to onscreen..
Reading from framebuffer GLSL to OpenCV http://stackoverflow.com/questions/14981881/reading-from-framebuffer-glsl-to-opencv pixels glPixelStorei GL_PACK_ALIGNMENT pixels.step 3 1 4 glReadPixels 0 0 1024 1024 GL_RGB GL_UNSIGNED_BYTE pixels.data glEnable GL_TEXTURE_2D..
Capturing video out of an OpenGL window in Windows http://stackoverflow.com/questions/154730/capturing-video-out-of-an-opengl-window-in-windows question is easy enough you just grab each frame with glReadPixels via a PBO if you need the performance . The second question..
How to take screenshot in opengl http://stackoverflow.com/questions/5844858/how-to-take-screenshot-in-opengl of opengl window in c and save it to file. I find a glReadPixels but dont know what to do next. Where i can set path to a file.. of 3 because it's RBG. BYTE pixels new BYTE 3 width height glReadPixels 0 0 width height GL_RGB GL_UNSIGNED_BYTE pixels Convert to FreeImage..
Converting data from glReadPixels() to OpenCV::Mat http://stackoverflow.com/questions/9097756/converting-data-from-glreadpixels-to-opencvmat data from glReadPixels to OpenCV Mat I want to get every OpenGL frame from an animation.. I want to get every OpenGL frame from an animation with glReadPixels and convert the data to OpenCV Mat . I know that glReadPixels.. and convert the data to OpenCV Mat . I know that glReadPixels gets the data by rows from the lower one to upper one from left..
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