Gtk-minimo中的几个BUG
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作者联系方式:李先静 <xianjimli at hotmail dot com>
颜色不正常:背景颜色和字体颜色随机变化,一会儿蓝一会白,甚至有时全变白色了,什么都看不见。我怀疑是内存越界或者使用了没有初始化的变量。但是用valgrind运行时没有任何发现迹象。只好手工去调试了,先在draw_glyph中设置断点,发现gc的颜色值不正常,进行一步跟踪发现UpdateGC后颜色没有生效,最后发现是nsGCCache::ReuseGC出了问题。原来在ReuseGC里面对于GTK+/DirectFB的处理有误,导致entry->gc的内容没有正常更新。我看了一下,那些判断并不会提高性能,就直接调用了gdk_gc_set_values强制更新。之后颜色恢复正常。
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状态栏隐藏之后不消失。我们发现在gtk_moz_embed_size_allocate函数中的参数完全正常,gtk_moz_embed的大小已经调整过了,但它就是没有重绘界面。mozilla的排版有点复杂,决定先花了两天时间看view/layout/dom目录中的代码再说。在有了大致的了解之后,我断定是viewmanager处理paint事件有问题,后来证实是判断view可见性有误。根据注释的提示,去掉对ViewObserver可见性的判断,gtk_moz_embed就刷新正常了。
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