85 lines
2.8 KiB
Go
85 lines
2.8 KiB
Go
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package main
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import (
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"log"
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"github.com/jezek/xgb/xproto"
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"github.com/jezek/xgbutil"
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"github.com/jezek/xgbutil/xgraphics"
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)
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func main() {
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log.SetFlags(0)
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X, err := xgbutil.NewConn()
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if err != nil {
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log.Fatalln(err)
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}
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checkCompatibility(X)
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}
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// checkCompatibility reads info in the X setup info struct and emits
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// messages to stderr if they don't correspond to values that xgraphics
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// supports.
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// The idea is that in the future, we'll support more values.
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// The real reason for checkCompatibility is to make debugging easier. Without
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// it, if the values weren't what we'd expect, we'd see garbled images in the
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// best case, and probably BadLength errors in the worst case.
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func checkCompatibility(X *xgbutil.XUtil) {
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s := X.Setup()
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scrn := X.Screen()
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failed := false
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if s.ImageByteOrder != xproto.ImageOrderLSBFirst {
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log.Printf("Your X server uses MSB image byte order. Unfortunately, " +
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"xgraphics currently requires LSB image byte order. You may see " +
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"weird things. Please report this.")
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failed = true
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}
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if s.BitmapFormatBitOrder != xproto.ImageOrderLSBFirst {
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log.Printf("Your X server uses MSB bitmap bit order. Unfortunately, " +
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"xgraphics currently requires LSB bitmap bit order. If you " +
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"aren't using X bitmaps, you should be able to proceed normally. " +
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"Please report this.")
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failed = true
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}
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if s.BitmapFormatScanlineUnit != 32 {
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log.Printf("xgraphics expects that the scanline unit is set to 32, "+
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"but your X server has it set to '%d'. "+
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"Namely, xgraphics hasn't been tested on other values. Things "+
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"may still work. Particularly, if you aren't using X bitmaps, "+
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"you should be completely unaffected. Please report this.",
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s.BitmapFormatScanlineUnit)
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failed = true
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}
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if scrn.RootDepth != 24 {
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log.Printf("xgraphics expects that the root window has a depth of 24, "+
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"but yours has depth '%d'. Its possible things will still work "+
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"if your value is 32, but will be unlikely to work with values "+
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"less than 24. Please report this.", scrn.RootDepth)
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failed = true
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}
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// Look for the default format for pixmaps and make sure bits per pixel
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// is 32.
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format := xgraphics.GetFormat(X, scrn.RootDepth)
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if format.BitsPerPixel != 32 {
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log.Printf("xgraphics expects that the bits per pixel for the root "+
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"window depth is 32. On your system, the root depth is %d and "+
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"the bits per pixel is %d. Things will most certainly not work. "+
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"Please report this.",
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scrn.RootDepth, format.BitsPerPixel)
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failed = true
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}
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// Give instructions on reporting the issue.
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if failed {
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log.Printf("Please report the aforementioned error message(s) at " +
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"https://github.com/jezek/xgbutil. Please also include the " +
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"entire output of the `xdpyinfo` command in your report. Thanks!")
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} else {
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log.Printf("No compatibility issues detected.")
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}
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}
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