glReadPixels and glReadnPixels return pixel data from the frame buffer, starting with the pixel whose lower left corner is at location (x, y), into client memory starting at location data. Several …

2017年3月21日 · First of all you call glReadPixels() with GL_FLOAT however pixel is an int[]. Additionally you call it with GL_RGB and since you want the alpha you need to pass …

2020年12月11日 · The glReadPixels function returns pixel data from the framebuffer, starting with the pixel whose lower-left corner is at location (x, y), into client memory starting at location …

2021年2月5日 · glReadPixels returns values from each pixel with lower left corner at (x + i, y + j) for 0 ≤ i < width and 0 ≤ j < height. This pixel is said to be the i th pixel in the j th row. Pixels …

glReadPixels returns pixel data from the frame buffer, starting with the pixel whose lower left corner is at location (x, y), into client memory starting at location data. Several parameters …

glReadPixels returns pixel data from the frame buffer, starting with the pixel whose lower left corner is at location (x, y), into client memory starting at location data. Several parameters …

2016年10月3日 · When you call glReadPixels; graphics card wait for the current frame to be done, reads the pixels and then starts computing the next frame. Therefore pipeline becomes stalled …

glReadPixels definitely works as advertised in this kind of setup - I just copied and pasted your code into a program and got expected results. That indicates to me that your problem is most …

glReadPixels returns values from each pixel with lower left corner at x + i y + j for 0 = i width and 0 = j height. This pixel is said to be the i th pixel in the j th row. Pixels are returned in row order …

glReadPixels returns pixel data from the frame buffer, starting with the pixel whose lower left corner is at location (x, y), into client memory starting at location data. Several parameters …