我正在尝试在桌面上添加一些花哨的东西，现在要处理的事情是为所有窗口设置阴影。我正在使用康普顿复合管理器，一切都很好，但请看以下图片：
如果窗户有正常的角，一切都没问题，但是当我试图把它们弄圆时，就会出现奇怪的效果。
我正在使用 debian 测试 disto、独立 openbox 和 nvidia 图形 (7600GT) + 专有驱动器。我安装了以下软件包：
$ dpkg -l | grep -i mesa
ii glx-alternative-mesa 0.4.1 amd64 allows the selection of MESA as GLX provider
ii libegl1-mesa:amd64 9.2.2-1 amd64 free implementation of the EGL API -- runtime
ii libegl1-mesa-drivers:amd64 9.2.2-1 amd64 free implementation of the EGL API -- hardware drivers
ii libgl1-mesa-dri:amd64 9.2.2-1 amd64 free implementation of the OpenGL API -- DRI modules
ii libgl1-mesa-glx:amd64 9.2.2-1 amd64 free implementation of the OpenGL API -- GLX runtime
ii libglapi-mesa:amd64 9.2.2-1 amd64 free implementation of the GL API -- shared library
ii libglu1-mesa:amd64 9.0.0-2 amd64 Mesa OpenGL utility library (GLU)
ii libopenvg1-mesa:amd64 9.2.2-1 amd64 free implementation of the OpenVG API -- runtime
ii libtxc-dxtn-s2tc0:amd64 0~git20121227-2 amd64 Texture compression library for Mesa
ii mesa-utils 8.1.0-2 amd64 Miscellaneous Mesa GL utilities
$ dpkg -l | grep -i xorg
ii xorg 1:7.7+4 amd64 X.Org X Window System
ii xorg-docs-core 1:1.7-1 all Core documentation for the X.org X Window System
ii xserver-xorg 1:7.7+4 amd64 X.Org X server
ii xserver-xorg-core 2:1.14.3-5 amd64 Xorg X server - core server
ii xserver-xorg-input-all 1:7.7+4 amd64 X.Org X server -- input driver metapackage
ii xserver-xorg-input-evdev 1:2.8.2-1 amd64 X.Org X server -- evdev input driver
ii xserver-xorg-input-mouse 1:1.9.0-1+b1 amd64 X.Org X server -- mouse input driver
ii xserver-xorg-input-synaptics 1.7.1-2+b1 amd64 Synaptics TouchPad driver for X.Org server
ii xserver-xorg-input-vmmouse 1:13.0.0-1+b1 amd64 X.Org X server -- VMMouse input driver to use with VMWare
ii xserver-xorg-video-all 1:7.7+4 amd64 X.Org X server -- output driver metapackage
ii xserver-xorg-video-ati 1:7.2.0-1+b2 amd64 X.Org X server -- AMD/ATI display driver wrapper
ii xserver-xorg-video-cirrus 1:1.5.2-1+b1 amd64 X.Org X server -- Cirrus display driver
ii xserver-xorg-video-fbdev 1:0.4.4-1 amd64 X.Org X server -- fbdev display driver
ii xserver-xorg-video-intel 2:2.21.15-1+b2 amd64 X.Org X server -- Intel i8xx, i9xx display driver
ii xserver-xorg-video-mach64 6.9.4-1+b1 amd64 X.Org X server -- ATI Mach64 display driver
ii xserver-xorg-video-mga 1:1.6.2-1+b1 amd64 X.Org X server -- MGA display driver
ii xserver-xorg-video-modesetting 0.8.1-1 amd64 X.Org X server -- Generic modesetting driver
ii xserver-xorg-video-neomagic 1:1.2.8-1 amd64 X.Org X server -- Neomagic display driver
ii xserver-xorg-video-nouveau 1:1.0.10-1 amd64 X.Org X server -- Nouveau display driver
ii xserver-xorg-video-nvidia-legacy-304xx 304.116-2 amd64 NVIDIA binary Xorg driver (304xx legacy version)
ii xserver-xorg-video-openchrome 1:0.3.3-1 amd64 X.Org X server -- VIA display driver
ii xserver-xorg-video-qxl 0.1.0-2.1 amd64 X.Org X server -- QXL display driver
ii xserver-xorg-video-r128 6.9.1-1 amd64 X.Org X server -- ATI r128 display driver
ii xserver-xorg-video-radeon 1:7.2.0-1+b2 amd64 X.Org X server -- AMD/ATI Radeon display driver
ii xserver-xorg-video-savage 1:2.3.7-2 amd64 X.Org X server -- Savage display driver
ii xserver-xorg-video-siliconmotion 1:1.7.7-2 amd64 X.Org X server -- SiliconMotion display driver
ii xserver-xorg-video-sisusb 1:0.9.6-2 amd64 X.Org X server -- SiS USB display driver
ii xserver-xorg-video-tdfx 1:1.4.5-1 amd64 X.Org X server -- tdfx display driver
ii xserver-xorg-video-trident 1:1.3.6-2 amd64 X.Org X server -- Trident display driver
ii xserver-xorg-video-vesa 1:2.3.3-1+b1 amd64 X.Org X server -- VESA display driver
ii xserver-xorg-video-vmware 1:13.0.1-2 amd64 X.Org X server -- VMware display driver
$ dpkg -l | grep -i compton
ii compton 0.1~beta2-1 amd64 compositor for X11, based on xcompmgr
$ dpkg -l | grep -i nvidia
ii glx-alternative-nvidia 0.4.1 amd64 allows the selection of NVIDIA as GLX provider
ii libgl1-nvidia-legacy-304xx-glx:amd64 304.116-2 amd64 NVIDIA binary OpenGL libraries (304xx legacy version)
ii nvclock-gtk 0.8b4+cvs20100914-5 amd64 Overclock an NVIDIA card (GTK+ interface)
ii nvidia-detect 319.76-1 amd64 NVIDIA GPU detection utility
ii nvidia-installer-cleanup 20131102+1 amd64 cleanup after driver installation with the nvidia-installer
ii nvidia-kernel-common 20131102+1 amd64 NVIDIA binary kernel module support files
ii nvidia-legacy-304xx-alternative 304.116-2 amd64 allows the selection of NVIDIA as GLX provider
ii nvidia-legacy-304xx-driver 304.116-2 amd64 NVIDIA metapackage (304xx legacy version)
ii nvidia-legacy-304xx-kernel-dkms 304.116-2 amd64 NVIDIA binary kernel module DKMS source (304xx legacy version)
ii nvidia-settings-legacy-304xx 304.116-1 amd64 tool for configuring the NVIDIA graphics driver (304xx legacy version)
ii nvidia-support 20131102+1 amd64 NVIDIA binary graphics driver support files
ii xserver-xorg-video-nvidia-legacy-304xx 304.116-2 amd64 NVIDIA binary Xorg driver (304xx legacy version)
内核版本：
$ uname -a
Linux morfikownia 3.11-2-amd64 #1 SMP Debian 3.11.10-1 (2013-12-04) x86_64 GNU/Linu
有人知道为什么会发生这种情况以及如何解决它吗？
答案1
我查看了康普顿配置文件，其中有类似这样的内容：
clear-shadow = true; # Zero the part of the shadow's mask behind the window (experimental).
你说这是实验性的？所以，我将其设置为 false，现在我有了漂亮的带阴影的圆形窗户：
还有另一种方法可以解决这个问题。您可以在 compton 的配置中设置以下选项：
clear-shadow = true;
shadow-ignore-shaped = flase;