backend: xrender: fix array size off-by-one
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
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@ -37,11 +37,11 @@ typedef struct _xrender_data {
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xcb_render_picture_t back[3];
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/// The back buffer that is for temporary use
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/// Age of each back buffer.
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int buffer_age[2];
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int buffer_age[3];
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/// The back buffer we should be painting into
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int curr_back;
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/// The corresponding pixmap to the back buffer
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xcb_pixmap_t back_pixmap[2];
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xcb_pixmap_t back_pixmap[3];
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/// The original root window content, usually the wallpaper.
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/// We save it so we don't loss the wallpaper when we paint over
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/// it.
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