// generate a PDO to hold the data we read back with glReadPixels()
// (Intel/DRI goes into a slow path if we don't read to PDO)
glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, 1);
// generate a PDO to hold the data we read back with glReadPixels()
// (Intel/DRI goes into a slow path if we don't read to PDO)
glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, 1);