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3e42402e2b
...
cc08b5457c
12
README
12
README
@ -40,7 +40,6 @@ figured out it would make sense:
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- hsm - system monitor
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- hss - spreadsheets
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- htd - translation dictionary
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- ht - terminal emulator
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- htk - GUI toolkit library
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See Projects for more information about the individual projects.
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@ -51,7 +50,7 @@ Identity
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--------
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The name merely hints at motivations and otherwise isn't of any practical
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significance other than that we need an identifier. This time I resisted using
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something offensive for personal amusement.
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something offensive.
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A logo covering the entire project is not needed and it seems hard to figure out
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anything meaninful anyway, though we might pick a specific font to use for the
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@ -185,9 +184,6 @@ only the per-buffer input line is going to be desynchronized.
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https://godoc.org/github.com/gorilla/websocket
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The higher-level client-server API could be made rather generic to allow for
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smooth integration with non-IRC "backends" such as Slack or Mattermost.
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htd -- translation dictionary
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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This specific kind of application doesn't need a lot of user interface either,
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@ -225,8 +221,6 @@ In the second stage, support for the Language Server Protocol will be added so
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that the project can be edited using its own tools. Some scripting, perhaps
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a tiny subset of VimL, might be desirable. Or other means of configuration.
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Visual block mode or the color column may still be implemented.
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The real model for the editor is Qt Creator with FakeVIM, though this is not to
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be a clone of it, e.g. the various "Output" lists could be just special buffers,
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which may be have names starting on "// ".
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@ -255,10 +249,6 @@ Indexing and search may be based on a common database, no need to get all fancy:
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http://rachbelaid.com/postgres-full-text-search-is-good-enough/
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https://www.sqlite.org/fts3.html#full_text_index_queries (FTS4 seems better)
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ht -- terminal emulator
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~~~~~~~~~~~~~~~~~~~~~~~
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Similar scope to st(1). Clever display of internal padding for better looks.
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The rest
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~~~~~~~~
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Currently there are no significant, specific plans about the other applications.
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@ -129,7 +129,7 @@ func main() {
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}
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}
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if result.err != nil {
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log("stdin: %s", result.err)
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log("%s: %s", "stdin", result.err)
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fromUser = nil
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if err := conn.CloseWrite(); err != nil {
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log("remote: %s", err)
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@ -1,313 +0,0 @@
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package main
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import (
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"encoding/binary"
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"github.com/BurntSushi/xgb"
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"github.com/BurntSushi/xgb/render"
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"github.com/BurntSushi/xgb/shm"
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"github.com/BurntSushi/xgb/xproto"
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"log"
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"os"
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"reflect"
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"time"
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"unsafe"
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"image"
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_ "image/gif"
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_ "image/jpeg"
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_ "image/png"
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)
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// #include <sys/ipc.h>
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// #include <sys/shm.h>
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import "C"
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func F64ToFixed(f float64) render.Fixed { return render.Fixed(f * 65536) }
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func FixedToF64(f render.Fixed) float64 { return float64(f) / 65536 }
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func main() {
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/*
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pf, err := os.Create("pprof.out")
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if err != nil {
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log.Fatal(err)
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}
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pprof.StartCPUProfile(pf)
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defer pprof.StopCPUProfile()
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*/
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// Load a picture from the command line.
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f, err := os.Open(os.Args[1])
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if err != nil {
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log.Fatalln(err)
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}
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defer f.Close()
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img, name, err := image.Decode(f)
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if err != nil {
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log.Fatalln(err)
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}
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log.Println("image type is", name)
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// Miscellaneous X11 initialization.
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X, err := xgb.NewConn()
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if err != nil {
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log.Fatalln(err)
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}
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if err := render.Init(X); err != nil {
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log.Fatalln(err)
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}
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setup := xproto.Setup(X)
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screen := setup.DefaultScreen(X)
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visual, depth := screen.RootVisual, screen.RootDepth
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// TODO: We should check that we find it, though we don't /need/ alpha here,
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// it's just a minor improvement--affects the backpixel value.
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for _, i := range screen.AllowedDepths {
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for _, v := range i.Visuals {
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// TODO: Could/should check other parameters.
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if i.Depth == 32 && v.Class == xproto.VisualClassTrueColor {
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visual, depth = v.VisualId, i.Depth
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break
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}
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}
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}
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mid, err := xproto.NewColormapId(X)
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if err != nil {
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log.Fatalln(err)
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}
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_ = xproto.CreateColormap(
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X, xproto.ColormapAllocNone, mid, screen.Root, visual)
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wid, err := xproto.NewWindowId(X)
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if err != nil {
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log.Fatalln(err)
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}
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// Border pixel and colormap are required when depth differs from parent.
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_ = xproto.CreateWindow(X, depth, wid, screen.Root,
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0, 0, 500, 500, 0, xproto.WindowClassInputOutput,
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visual, xproto.CwBackPixel|xproto.CwBorderPixel|xproto.CwEventMask|
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xproto.CwColormap, []uint32{0x80808080, 0,
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xproto.EventMaskStructureNotify | xproto.EventMaskExposure,
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uint32(mid)})
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title := []byte("Image")
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_ = xproto.ChangeProperty(X, xproto.PropModeReplace, wid, xproto.AtomWmName,
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xproto.AtomString, 8, uint32(len(title)), title)
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_ = xproto.MapWindow(X, wid)
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pformats, err := render.QueryPictFormats(X).Reply()
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if err != nil {
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log.Fatalln(err)
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}
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// Similar to XRenderFindVisualFormat.
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// The DefaultScreen is almost certain to be zero.
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var pformat render.Pictformat
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for _, pd := range pformats.Screens[X.DefaultScreen].Depths {
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// This check seems to be slightly extraneous.
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if pd.Depth != depth {
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continue
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}
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for _, pv := range pd.Visuals {
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if pv.Visual == visual {
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pformat = pv.Format
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}
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}
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}
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// Wrap the window's surface in a picture.
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pid, err := render.NewPictureId(X)
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if err != nil {
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log.Fatalln(err)
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}
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render.CreatePicture(X, pid, xproto.Drawable(wid), pformat, 0, []uint32{})
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// setup.BitmapFormatScanline{Pad,Unit} and setup.BitmapFormatBitOrder
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// don't interest us here since we're only using Z format pixmaps.
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for _, pf := range setup.PixmapFormats {
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if pf.Depth == 32 {
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if pf.BitsPerPixel != 32 || pf.ScanlinePad != 32 {
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log.Fatalln("unsuported X server")
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}
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}
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}
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pixid, err := xproto.NewPixmapId(X)
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if err != nil {
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log.Fatalln(err)
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}
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_ = xproto.CreatePixmap(X, 32, pixid, xproto.Drawable(screen.Root),
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uint16(img.Bounds().Dx()), uint16(img.Bounds().Dy()))
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var bgraFormat render.Pictformat
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wanted := render.Directformat{
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RedShift: 16,
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RedMask: 0xff,
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GreenShift: 8,
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GreenMask: 0xff,
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BlueShift: 0,
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BlueMask: 0xff,
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AlphaShift: 24,
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AlphaMask: 0xff,
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}
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for _, pf := range pformats.Formats {
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if pf.Depth == 32 && pf.Direct == wanted {
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bgraFormat = pf.Id
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break
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}
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}
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if bgraFormat == 0 {
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log.Fatalln("ARGB format not found")
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}
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// We could also look for the inverse pictformat.
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var encoding binary.ByteOrder
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if setup.ImageByteOrder == xproto.ImageOrderMSBFirst {
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encoding = binary.BigEndian
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} else {
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encoding = binary.LittleEndian
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}
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pixpicid, err := render.NewPictureId(X)
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if err != nil {
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log.Fatalln(err)
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}
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render.CreatePicture(X, pixpicid, xproto.Drawable(pixid), bgraFormat,
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0, []uint32{})
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// Do we really need this? :/
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cid, err := xproto.NewGcontextId(X)
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if err != nil {
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log.Fatalln(err)
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}
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_ = xproto.CreateGC(X, cid, xproto.Drawable(pixid),
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xproto.GcGraphicsExposures, []uint32{0})
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bounds := img.Bounds()
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Lstart := time.Now()
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if err := shm.Init(X); err != nil {
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log.Println("MIT-SHM unavailable")
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// We're being lazy and resolve the 1<<16 limit of requests by sending
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// a row at a time. The encoding is also done inefficiently.
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// Also see xgbutil/xgraphics/xsurface.go.
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row := make([]byte, bounds.Dx()*4)
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for y := bounds.Min.Y; y < bounds.Max.Y; y++ {
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for x := bounds.Min.X; x < bounds.Max.X; x++ {
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r, g, b, a := img.At(x, y).RGBA()
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encoding.PutUint32(row[x*4:],
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(a>>8)<<24|(r>>8)<<16|(g>>8)<<8|(b>>8))
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}
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_ = xproto.PutImage(X, xproto.ImageFormatZPixmap,
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xproto.Drawable(pixid), cid, uint16(bounds.Dx()), 1,
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0, int16(y),
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0, 32, row)
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}
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} else {
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rep, err := shm.QueryVersion(X).Reply()
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if err != nil {
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log.Fatalln(err)
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}
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if rep.PixmapFormat != xproto.ImageFormatZPixmap ||
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!rep.SharedPixmaps {
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log.Fatalln("MIT-SHM configuration unfit")
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}
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shmSize := bounds.Dx() * bounds.Dy() * 4
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|
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// As a side note, to clean up unreferenced segments (orphans):
|
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// ipcs -m | awk '$6 == "0" { print $2 }' | xargs ipcrm shm
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shmID := int(C.shmget(C.IPC_PRIVATE,
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C.size_t(shmSize), C.IPC_CREAT|0777))
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if shmID == -1 {
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// TODO: We should handle this case by falling back to PutImage,
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// if only because the allocation may hit a system limit.
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log.Fatalln("memory allocation failed")
|
||||
}
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||||
|
||||
dataRaw := C.shmat(C.int(shmID), nil, 0)
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||||
defer C.shmdt(dataRaw)
|
||||
defer C.shmctl(C.int(shmID), C.IPC_RMID, nil)
|
||||
|
||||
data := *(*[]byte)(unsafe.Pointer(&reflect.SliceHeader{
|
||||
Data: uintptr(dataRaw), Len: shmSize, Cap: shmSize}))
|
||||
for y := bounds.Min.Y; y < bounds.Max.Y; y++ {
|
||||
row := data[y*bounds.Dx()*4:]
|
||||
for x := bounds.Min.X; x < bounds.Max.X; x++ {
|
||||
r, g, b, a := img.At(x, y).RGBA()
|
||||
encoding.PutUint32(row[x*4:],
|
||||
(a>>8)<<24|(r>>8)<<16|(g>>8)<<8|(b>>8))
|
||||
}
|
||||
}
|
||||
|
||||
segid, err := shm.NewSegId(X)
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
// Need to have it attached on the server before we unload the segment.
|
||||
c := shm.AttachChecked(X, segid, uint32(shmID), true /* RO */)
|
||||
if err := c.Check(); err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
_ = shm.PutImage(X, xproto.Drawable(pixid), cid,
|
||||
uint16(bounds.Dx()), uint16(bounds.Dy()), 0, 0,
|
||||
uint16(bounds.Dx()), uint16(bounds.Dy()), 0, 0,
|
||||
32, xproto.ImageFormatZPixmap,
|
||||
0 /* SendEvent */, segid, 0 /* Offset */)
|
||||
}
|
||||
|
||||
log.Println("uploading took", time.Now().Sub(Lstart))
|
||||
|
||||
var scale float64 = 1
|
||||
for {
|
||||
ev, xerr := X.WaitForEvent()
|
||||
if xerr != nil {
|
||||
log.Printf("Error: %s\n", xerr)
|
||||
return
|
||||
}
|
||||
if ev == nil {
|
||||
return
|
||||
}
|
||||
|
||||
log.Printf("Event: %s\n", ev)
|
||||
switch e := ev.(type) {
|
||||
case xproto.UnmapNotifyEvent:
|
||||
return
|
||||
|
||||
case xproto.ConfigureNotifyEvent:
|
||||
w, h := e.Width, e.Height
|
||||
|
||||
scaleX := float64(bounds.Dx()) / float64(w)
|
||||
scaleY := float64(bounds.Dy()) / float64(h)
|
||||
|
||||
if scaleX < scaleY {
|
||||
scale = scaleY
|
||||
} else {
|
||||
scale = scaleX
|
||||
}
|
||||
|
||||
_ = render.SetPictureTransform(X, pixpicid, render.Transform{
|
||||
F64ToFixed(scale), F64ToFixed(0), F64ToFixed(0),
|
||||
F64ToFixed(0), F64ToFixed(scale), F64ToFixed(0),
|
||||
F64ToFixed(0), F64ToFixed(0), F64ToFixed(1),
|
||||
})
|
||||
_ = render.SetPictureFilter(X, pixpicid, 8, "bilinear", nil)
|
||||
|
||||
case xproto.ExposeEvent:
|
||||
_ = render.Composite(X, render.PictOpSrc,
|
||||
pixpicid, render.PictureNone, pid,
|
||||
0, 0, 0, 0, 0 /* dst-x */, 0, /* dst-y */
|
||||
uint16(float64(img.Bounds().Dx())/scale),
|
||||
uint16(float64(img.Bounds().Dy())/scale))
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -1,213 +0,0 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"github.com/BurntSushi/xgb"
|
||||
//"github.com/BurntSushi/xgb/xkb"
|
||||
"github.com/BurntSushi/xgb/xproto"
|
||||
"log"
|
||||
)
|
||||
|
||||
func main() {
|
||||
X, err := xgb.NewConn()
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
/*
|
||||
// Use the extension if available, makes better use of state bits.
|
||||
if err := xkb.Init(X); err == nil {
|
||||
if _, err := xkb.UseExtension(X, 1, 0).Reply(); err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
}
|
||||
*/
|
||||
|
||||
setup := xproto.Setup(X)
|
||||
screen := setup.DefaultScreen(X)
|
||||
|
||||
visual, depth := screen.RootVisual, screen.RootDepth
|
||||
// TODO: We should check that we find it, though we don't /need/ alpha here,
|
||||
// it's just a minor improvement--affects the backpixel value.
|
||||
for _, i := range screen.AllowedDepths {
|
||||
for _, v := range i.Visuals {
|
||||
// TODO: Could/should check other parameters.
|
||||
if i.Depth == 32 && v.Class == xproto.VisualClassTrueColor {
|
||||
visual, depth = v.VisualId, i.Depth
|
||||
break
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
mid, err := xproto.NewColormapId(X)
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
_ = xproto.CreateColormap(
|
||||
X, xproto.ColormapAllocNone, mid, screen.Root, visual)
|
||||
|
||||
wid, err := xproto.NewWindowId(X)
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
// Border pixel and colormap are required when depth differs from parent.
|
||||
_ = xproto.CreateWindow(X, depth, wid, screen.Root,
|
||||
0, 0, 500, 500, 0, xproto.WindowClassInputOutput,
|
||||
visual, xproto.CwBackPixel|xproto.CwBorderPixel|xproto.CwEventMask|
|
||||
xproto.CwColormap, []uint32{0x80808080, 0,
|
||||
xproto.EventMaskStructureNotify | xproto.EventMaskKeyPress |
|
||||
/* KeymapNotify */ xproto.EventMaskKeymapState, uint32(mid)})
|
||||
|
||||
title := []byte("Keys")
|
||||
_ = xproto.ChangeProperty(X, xproto.PropModeReplace, wid, xproto.AtomWmName,
|
||||
xproto.AtomString, 8, uint32(len(title)), title)
|
||||
|
||||
_ = xproto.MapWindow(X, wid)
|
||||
|
||||
mapping, err := xproto.GetKeyboardMapping(X, setup.MinKeycode,
|
||||
byte(setup.MaxKeycode-setup.MinKeycode+1)).Reply()
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
// The order is "Shift, Lock, Control, Mod1, Mod2, Mod3, Mod4, and Mod5."
|
||||
mm, err := xproto.GetModifierMapping(X).Reply()
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
// XXX: This seems pointless, the key will just end up switching groups
|
||||
// instead of levels without full XKB handling. Though perhaps it might
|
||||
// at least work as intended when there's only one XKB group.
|
||||
const MODE_SWITCH = 0xff7e
|
||||
|
||||
var modeSwitchMask uint16
|
||||
for mod := 0; mod < 8; mod++ {
|
||||
perMod := int(mm.KeycodesPerModifier)
|
||||
for _, kc := range mm.Keycodes[mod*perMod : (mod+1)*perMod] {
|
||||
if kc == 0 {
|
||||
continue
|
||||
}
|
||||
|
||||
perKc := int(mapping.KeysymsPerKeycode)
|
||||
k := int(kc - setup.MinKeycode)
|
||||
for _, ks := range mapping.Keysyms[k*perKc : (k+1)*perKc] {
|
||||
if ks == MODE_SWITCH {
|
||||
modeSwitchMask |= 1 << uint(mod)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
for {
|
||||
ev, xerr := X.WaitForEvent()
|
||||
if xerr != nil {
|
||||
log.Printf("Error: %s\n", xerr)
|
||||
return
|
||||
}
|
||||
if ev == nil {
|
||||
return
|
||||
}
|
||||
|
||||
log.Printf("Event: %s\n", ev)
|
||||
switch e := ev.(type) {
|
||||
case xproto.UnmapNotifyEvent:
|
||||
return
|
||||
|
||||
case xproto.KeymapNotifyEvent:
|
||||
// e.Keys is a 32 * 8 large bitmap indicating which keys are
|
||||
// currently pressed down. This is sent "after every EnterNotify
|
||||
// and FocusIn" but it also seems to fire when the keyboard layout
|
||||
// changes. aixterm manual even speaks of that explicitly.
|
||||
//
|
||||
// But since changing the effective group involves no changes to
|
||||
// the compatibility mapping, there's nothing for us to do.
|
||||
|
||||
case xproto.MappingNotifyEvent:
|
||||
// e.FirstKeyCode .. e.Count changes have happened but rereading
|
||||
// everything is the simpler thing to do.
|
||||
mapping, err = xproto.GetKeyboardMapping(X, setup.MinKeycode,
|
||||
byte(setup.MaxKeycode-setup.MinKeycode+1)).Reply()
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
// TODO: We should also repeat the search for MODE SWITCH.
|
||||
|
||||
case xproto.KeyPressEvent:
|
||||
step := int(mapping.KeysymsPerKeycode)
|
||||
from := int(e.Detail-setup.MinKeycode) * step
|
||||
ks := mapping.Keysyms[from : from+step]
|
||||
|
||||
// Strip trailing NoSymbol entries.
|
||||
for len(ks) > 0 && ks[len(ks)-1] == 0 {
|
||||
ks = ks[:len(ks)-1]
|
||||
}
|
||||
|
||||
// Expand back to at least 4.
|
||||
switch {
|
||||
case len(ks) == 1:
|
||||
ks = append(ks, 0, ks[0], 0)
|
||||
case len(ks) == 2:
|
||||
ks = append(ks, ks[0], ks[1])
|
||||
case len(ks) == 3:
|
||||
ks = append(ks, 0)
|
||||
}
|
||||
|
||||
// Other silly expansion rules, only applied to basic ASCII.
|
||||
if ks[1] == 0 {
|
||||
ks[1] = ks[0]
|
||||
if ks[0] >= 'A' && ks[0] <= 'Z' ||
|
||||
ks[0] >= 'a' && ks[0] <= 'z' {
|
||||
ks[0] = ks[0] | 32
|
||||
ks[1] = ks[0] &^ 32
|
||||
}
|
||||
}
|
||||
|
||||
if ks[3] == 0 {
|
||||
ks[3] = ks[2]
|
||||
if ks[2] >= 'A' && ks[2] <= 'Z' ||
|
||||
ks[2] >= 'a' && ks[2] <= 'z' {
|
||||
ks[2] = ks[2] | 32
|
||||
ks[3] = ks[2] &^ 32
|
||||
}
|
||||
}
|
||||
|
||||
// We only have enough information to switch between two groups.
|
||||
offset := 0
|
||||
if e.State&modeSwitchMask != 0 {
|
||||
offset += 2
|
||||
}
|
||||
|
||||
var result xproto.Keysym
|
||||
|
||||
shift := e.State&xproto.ModMaskShift != 0
|
||||
lock := e.State&xproto.ModMaskLock != 0
|
||||
switch {
|
||||
case !shift && !lock:
|
||||
result = ks[offset+0]
|
||||
case !shift && lock:
|
||||
if ks[offset+0] >= 'a' && ks[offset+0] <= 'z' {
|
||||
result = ks[offset+1]
|
||||
} else {
|
||||
result = ks[offset+0]
|
||||
}
|
||||
case shift && lock:
|
||||
if ks[offset+1] >= 'a' && ks[offset+1] <= 'z' {
|
||||
result = ks[offset+1] &^ 32
|
||||
} else {
|
||||
result = ks[offset+1]
|
||||
}
|
||||
case shift:
|
||||
result = ks[offset+1]
|
||||
}
|
||||
|
||||
if result <= 0xff {
|
||||
log.Printf("%c (Latin-1)\n", rune(result))
|
||||
} else {
|
||||
log.Println(result)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -1,40 +0,0 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"github.com/BurntSushi/xgb"
|
||||
"github.com/BurntSushi/xgb/xproto"
|
||||
"log"
|
||||
|
||||
// Needs a patched local version with xcb-proto 1.12 and this fix:
|
||||
// -size := xgb.Pad((8 + (24 + xgb.Pad((int(NOutput) * 4)))))
|
||||
// +size := xgb.Pad((8 + (24 + xgb.Pad((int(Monitorinfo.NOutput) * 4)))))
|
||||
"github.com/BurntSushi/xgb/randr"
|
||||
)
|
||||
|
||||
func main() {
|
||||
X, err := xgb.NewConn()
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
if err := randr.Init(X); err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
setup := xproto.Setup(X)
|
||||
screen := setup.DefaultScreen(X)
|
||||
|
||||
ms, err := randr.GetMonitors(X, screen.Root, true /* GetActive */).Reply()
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
for _, m := range ms.Monitors {
|
||||
reply, err := xproto.GetAtomName(X, m.Name).Reply()
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
log.Printf("Monitor %s %+v\n", reply.Name, m)
|
||||
}
|
||||
}
|
||||
@ -1,538 +0,0 @@
|
||||
// This is an amalgamation of xgb-xrender.go and xgb-keys.go and more of a demo,
|
||||
// some comments have been stripped.
|
||||
package main
|
||||
|
||||
import (
|
||||
"github.com/BurntSushi/xgb"
|
||||
"github.com/BurntSushi/xgb/render"
|
||||
"github.com/BurntSushi/xgb/xproto"
|
||||
"github.com/golang/freetype"
|
||||
"github.com/golang/freetype/truetype"
|
||||
"golang.org/x/image/font"
|
||||
"golang.org/x/image/font/gofont/goregular"
|
||||
"golang.org/x/image/math/fixed"
|
||||
"image"
|
||||
"image/draw"
|
||||
"io/ioutil"
|
||||
"log"
|
||||
"os"
|
||||
"strings"
|
||||
)
|
||||
|
||||
func glyphListBytes(buf []byte, runes []rune, size int) int {
|
||||
b := 0
|
||||
for _, r := range runes {
|
||||
switch size {
|
||||
default:
|
||||
buf[b] = byte(r)
|
||||
b += 1
|
||||
case 2:
|
||||
xgb.Put16(buf[b:], uint16(r))
|
||||
b += 2
|
||||
case 4:
|
||||
xgb.Put32(buf[b:], uint32(r))
|
||||
b += 4
|
||||
}
|
||||
}
|
||||
return xgb.Pad(b)
|
||||
}
|
||||
|
||||
// When the len is 255, a GLYPHABLE follows, otherwise a list of CARD8/16/32.
|
||||
func glyphEltHeaderBytes(buf []byte, len byte, deltaX, deltaY int16) int {
|
||||
b := 0
|
||||
buf[b] = len
|
||||
b += 4
|
||||
xgb.Put16(buf[b:], uint16(deltaX))
|
||||
b += 2
|
||||
xgb.Put16(buf[b:], uint16(deltaY))
|
||||
b += 2
|
||||
return xgb.Pad(b)
|
||||
}
|
||||
|
||||
type xgbCookie interface{ Check() error }
|
||||
|
||||
// compositeString makes an appropriate render.CompositeGlyphs request,
|
||||
// assuming that glyphs equal Unicode codepoints.
|
||||
func compositeString(c *xgb.Conn, op byte, src, dst render.Picture,
|
||||
maskFormat render.Pictformat, glyphset render.Glyphset, srcX, srcY int16,
|
||||
destX, destY int16, text string) xgbCookie {
|
||||
runes := []rune(text)
|
||||
|
||||
var highest rune
|
||||
for _, r := range runes {
|
||||
if r > highest {
|
||||
highest = r
|
||||
}
|
||||
}
|
||||
|
||||
size := 1
|
||||
switch {
|
||||
case highest > 1<<16:
|
||||
size = 4
|
||||
case highest > 1<<8:
|
||||
size = 2
|
||||
}
|
||||
|
||||
// They gave up on the XCB protocol API and we need to serialize explicitly.
|
||||
|
||||
// To spare us from caring about the padding, use the largest number lesser
|
||||
// than 255 that is divisible by 4 (for size 2 and 4 the requirements are
|
||||
// less strict but this works in the general case).
|
||||
const maxPerChunk = 252
|
||||
|
||||
buf := make([]byte, (len(runes)+maxPerChunk-1)/maxPerChunk*8+len(runes)*size)
|
||||
b := 0
|
||||
|
||||
for len(runes) > maxPerChunk {
|
||||
b += glyphEltHeaderBytes(buf[b:], maxPerChunk, 0, 0)
|
||||
b += glyphListBytes(buf[b:], runes[:maxPerChunk], size)
|
||||
runes = runes[maxPerChunk:]
|
||||
}
|
||||
if len(runes) > 0 {
|
||||
b += glyphEltHeaderBytes(buf[b:], byte(len(runes)), destX, destY)
|
||||
b += glyphListBytes(buf[b:], runes, size)
|
||||
}
|
||||
|
||||
switch size {
|
||||
default:
|
||||
return render.CompositeGlyphs8(c, op, src, dst, maskFormat, glyphset,
|
||||
srcX, srcY, buf)
|
||||
case 2:
|
||||
return render.CompositeGlyphs16(c, op, src, dst, maskFormat, glyphset,
|
||||
srcX, srcY, buf)
|
||||
case 4:
|
||||
return render.CompositeGlyphs32(c, op, src, dst, maskFormat, glyphset,
|
||||
srcX, srcY, buf)
|
||||
}
|
||||
}
|
||||
|
||||
type textRenderer struct {
|
||||
f *truetype.Font
|
||||
opts *truetype.Options
|
||||
face font.Face
|
||||
|
||||
bounds fixed.Rectangle26_6 // outer bounds for all the font's glyph
|
||||
buf *image.RGBA // rendering buffer
|
||||
|
||||
X *xgb.Conn
|
||||
gsid render.Glyphset
|
||||
loaded map[rune]bool
|
||||
}
|
||||
|
||||
func newTextRenderer(X *xgb.Conn, ttf []byte, opts *truetype.Options) (
|
||||
*textRenderer, error) {
|
||||
pformats, err := render.QueryPictFormats(X).Reply()
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
// We use RGBA here just so that lines are padded to 32 bits.
|
||||
// Since there's no subpixel antialiasing and alpha is premultiplied,
|
||||
// it doesn't even mater that RGBA is interpreted as ARGB or BGRA.
|
||||
var rgbFormat render.Pictformat
|
||||
for _, pf := range pformats.Formats {
|
||||
if pf.Depth == 32 && pf.Direct.AlphaMask != 0 {
|
||||
rgbFormat = pf.Id
|
||||
break
|
||||
}
|
||||
}
|
||||
|
||||
tr := &textRenderer{opts: opts, X: X, loaded: make(map[rune]bool)}
|
||||
if tr.f, err = freetype.ParseFont(goregular.TTF); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
tr.face = truetype.NewFace(tr.f, opts)
|
||||
tr.bounds = tr.f.Bounds(fixed.Int26_6(opts.Size * float64(opts.DPI) *
|
||||
(64.0 / 72.0)))
|
||||
|
||||
if tr.gsid, err = render.NewGlyphsetId(X); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if err := render.CreateGlyphSetChecked(X, tr.gsid, rgbFormat).
|
||||
Check(); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
tr.buf = image.NewRGBA(image.Rect(
|
||||
+tr.bounds.Min.X.Floor(),
|
||||
-tr.bounds.Min.Y.Floor(),
|
||||
+tr.bounds.Max.X.Ceil(),
|
||||
-tr.bounds.Max.Y.Ceil(),
|
||||
))
|
||||
return tr, nil
|
||||
}
|
||||
|
||||
func (tr *textRenderer) addRune(r rune) bool {
|
||||
dr, mask, maskp, advance, ok := tr.face.Glyph(
|
||||
fixed.P(0, 0) /* subpixel destination location */, r)
|
||||
if !ok {
|
||||
return false
|
||||
}
|
||||
|
||||
for i := 0; i < len(tr.buf.Pix); i++ {
|
||||
tr.buf.Pix[i] = 0
|
||||
}
|
||||
|
||||
// Copying, since there are absolutely no guarantees.
|
||||
draw.Draw(tr.buf, dr, mask, maskp, draw.Src)
|
||||
|
||||
_ = render.AddGlyphs(tr.X, tr.gsid, 1, []uint32{uint32(r)},
|
||||
[]render.Glyphinfo{{
|
||||
Width: uint16(tr.buf.Rect.Size().X),
|
||||
Height: uint16(tr.buf.Rect.Size().Y),
|
||||
X: int16(-tr.bounds.Min.X.Floor()),
|
||||
Y: int16(+tr.bounds.Max.Y.Ceil()),
|
||||
XOff: int16(advance.Ceil()),
|
||||
YOff: int16(0),
|
||||
}}, []byte(tr.buf.Pix))
|
||||
return true
|
||||
}
|
||||
|
||||
func (tr *textRenderer) render(src, dst render.Picture,
|
||||
srcX, srcY, destX, destY int16, text string) xgbCookie {
|
||||
// XXX: You're really supposed to handle tabs differently from this.
|
||||
text = strings.Replace(text, "\t", " ", -1)
|
||||
|
||||
for _, r := range text {
|
||||
if !tr.loaded[r] {
|
||||
tr.addRune(r)
|
||||
tr.loaded[r] = true
|
||||
}
|
||||
}
|
||||
|
||||
return compositeString(tr.X, render.PictOpOver, src, dst,
|
||||
0 /* TODO: mask Pictureformat? */, tr.gsid,
|
||||
srcX, srcY, destX, destY, text)
|
||||
}
|
||||
|
||||
const (
|
||||
ksEscape = 0xff1b
|
||||
ksUp = 0xff52
|
||||
ksDown = 0xff54
|
||||
ksPageUp = 0xff55
|
||||
ksPageDown = 0xff56
|
||||
ksModeSwitch = 0xff7e
|
||||
)
|
||||
|
||||
type keyMapper struct {
|
||||
X *xgb.Conn
|
||||
setup *xproto.SetupInfo
|
||||
mapping *xproto.GetKeyboardMappingReply
|
||||
|
||||
modeSwitchMask uint16
|
||||
}
|
||||
|
||||
func newKeyMapper(X *xgb.Conn) (*keyMapper, error) {
|
||||
m := &keyMapper{X: X, setup: xproto.Setup(X)}
|
||||
if err := m.update(); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return m, nil
|
||||
}
|
||||
|
||||
func (km *keyMapper) update() error {
|
||||
var err error
|
||||
km.mapping, err = xproto.GetKeyboardMapping(km.X, km.setup.MinKeycode,
|
||||
byte(km.setup.MaxKeycode-km.setup.MinKeycode+1)).Reply()
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
km.modeSwitchMask = 0
|
||||
|
||||
// The order is "Shift, Lock, Control, Mod1, Mod2, Mod3, Mod4, and Mod5."
|
||||
mm, err := xproto.GetModifierMapping(km.X).Reply()
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
perMod := int(mm.KeycodesPerModifier)
|
||||
perKc := int(km.mapping.KeysymsPerKeycode)
|
||||
for mod := 0; mod < 8; mod++ {
|
||||
for _, kc := range mm.Keycodes[mod*perMod : (mod+1)*perMod] {
|
||||
if kc == 0 {
|
||||
continue
|
||||
}
|
||||
|
||||
k := int(kc - km.setup.MinKeycode)
|
||||
for _, ks := range km.mapping.Keysyms[k*perKc : (k+1)*perKc] {
|
||||
if ks == ksModeSwitch {
|
||||
km.modeSwitchMask |= 1 << uint(mod)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (km *keyMapper) decode(e xproto.KeyPressEvent) (result xproto.Keysym) {
|
||||
step := int(km.mapping.KeysymsPerKeycode)
|
||||
from := int(e.Detail-km.setup.MinKeycode) * step
|
||||
ks := km.mapping.Keysyms[from : from+step]
|
||||
|
||||
// Strip trailing NoSymbol entries.
|
||||
for len(ks) > 0 && ks[len(ks)-1] == 0 {
|
||||
ks = ks[:len(ks)-1]
|
||||
}
|
||||
|
||||
// Expand back to at least 4.
|
||||
switch {
|
||||
case len(ks) == 1:
|
||||
ks = append(ks, 0, ks[0], 0)
|
||||
case len(ks) == 2:
|
||||
ks = append(ks, ks[0], ks[1])
|
||||
case len(ks) == 3:
|
||||
ks = append(ks, 0)
|
||||
}
|
||||
|
||||
// Other silly expansion rules, only applied to basic ASCII since we
|
||||
// don't have translation tables to Unicode here for brevity.
|
||||
if ks[1] == 0 {
|
||||
ks[1] = ks[0]
|
||||
if ks[0] >= 'A' && ks[0] <= 'Z' ||
|
||||
ks[0] >= 'a' && ks[0] <= 'z' {
|
||||
ks[0] = ks[0] | 32
|
||||
ks[1] = ks[0] &^ 32
|
||||
}
|
||||
}
|
||||
|
||||
if ks[3] == 0 {
|
||||
ks[3] = ks[2]
|
||||
if ks[2] >= 'A' && ks[2] <= 'Z' ||
|
||||
ks[2] >= 'a' && ks[2] <= 'z' {
|
||||
ks[2] = ks[2] | 32
|
||||
ks[3] = ks[2] &^ 32
|
||||
}
|
||||
}
|
||||
|
||||
offset := 0
|
||||
if e.State&km.modeSwitchMask != 0 {
|
||||
offset += 2
|
||||
}
|
||||
|
||||
shift := e.State&xproto.ModMaskShift != 0
|
||||
lock := e.State&xproto.ModMaskLock != 0
|
||||
switch {
|
||||
case !shift && !lock:
|
||||
result = ks[offset+0]
|
||||
case !shift && lock:
|
||||
if ks[offset+0] >= 'a' && ks[offset+0] <= 'z' {
|
||||
result = ks[offset+1]
|
||||
} else {
|
||||
result = ks[offset+0]
|
||||
}
|
||||
case shift && lock:
|
||||
if ks[offset+1] >= 'a' && ks[offset+1] <= 'z' {
|
||||
result = ks[offset+1] &^ 32
|
||||
} else {
|
||||
result = ks[offset+1]
|
||||
}
|
||||
case shift:
|
||||
result = ks[offset+1]
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func main() {
|
||||
if len(os.Args) < 2 {
|
||||
log.Fatalln("no filename given")
|
||||
}
|
||||
|
||||
text, err := ioutil.ReadFile(os.Args[1])
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
lines := strings.Split(string(text), "\n")
|
||||
|
||||
X, err := xgb.NewConn()
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
if err := render.Init(X); err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
setup := xproto.Setup(X)
|
||||
screen := setup.DefaultScreen(X)
|
||||
|
||||
visual, depth := screen.RootVisual, screen.RootDepth
|
||||
// TODO: We should check that we find it, though we don't /need/ alpha here,
|
||||
// it's just a minor improvement--affects the backpixel value.
|
||||
for _, i := range screen.AllowedDepths {
|
||||
// TODO: Could/should check other parameters.
|
||||
for _, v := range i.Visuals {
|
||||
if i.Depth == 32 && v.Class == xproto.VisualClassTrueColor {
|
||||
visual, depth = v.VisualId, i.Depth
|
||||
break
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
mid, err := xproto.NewColormapId(X)
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
_ = xproto.CreateColormap(
|
||||
X, xproto.ColormapAllocNone, mid, screen.Root, visual)
|
||||
|
||||
wid, err := xproto.NewWindowId(X)
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
// Border pixel and colormap are required when depth differs from parent.
|
||||
_ = xproto.CreateWindow(X, depth, wid, screen.Root,
|
||||
0, 0, 500, 500, 0, xproto.WindowClassInputOutput,
|
||||
visual, xproto.CwBackPixel|xproto.CwBorderPixel|xproto.CwEventMask|
|
||||
xproto.CwColormap, []uint32{0xf0f0f0f0, 0,
|
||||
xproto.EventMaskStructureNotify | xproto.EventMaskKeyPress |
|
||||
/* KeymapNotify */ xproto.EventMaskKeymapState |
|
||||
xproto.EventMaskExposure | xproto.EventMaskButtonPress,
|
||||
uint32(mid)})
|
||||
|
||||
title := []byte("Viewer")
|
||||
_ = xproto.ChangeProperty(X, xproto.PropModeReplace, wid, xproto.AtomWmName,
|
||||
xproto.AtomString, 8, uint32(len(title)), title)
|
||||
|
||||
_ = xproto.MapWindow(X, wid)
|
||||
|
||||
pformats, err := render.QueryPictFormats(X).Reply()
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
// Similar to XRenderFindVisualFormat.
|
||||
// The DefaultScreen is almost certain to be zero.
|
||||
var pformat render.Pictformat
|
||||
for _, pd := range pformats.Screens[X.DefaultScreen].Depths {
|
||||
// This check seems to be slightly extraneous.
|
||||
if pd.Depth != depth {
|
||||
continue
|
||||
}
|
||||
for _, pv := range pd.Visuals {
|
||||
if pv.Visual == visual {
|
||||
pformat = pv.Format
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pid, err := render.NewPictureId(X)
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
render.CreatePicture(X, pid, xproto.Drawable(wid), pformat, 0, []uint32{})
|
||||
|
||||
blackid, err := render.NewPictureId(X)
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
_ = render.CreateSolidFill(X, blackid, render.Color{Alpha: 0xffff})
|
||||
|
||||
tr, err := newTextRenderer(X, goregular.TTF, &truetype.Options{
|
||||
Size: 10,
|
||||
DPI: float64(screen.WidthInPixels) /
|
||||
float64(screen.WidthInMillimeters) * 25.4,
|
||||
Hinting: font.HintingFull,
|
||||
})
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
scroll := 0 // index of the top line
|
||||
|
||||
var w, h uint16
|
||||
redraw := func() {
|
||||
y, ascent, step := 5, tr.bounds.Max.Y.Ceil(),
|
||||
tr.bounds.Max.Y.Ceil()-tr.bounds.Min.Y.Floor()
|
||||
for _, line := range lines[scroll:] {
|
||||
if uint16(y) >= h {
|
||||
break
|
||||
}
|
||||
_ = tr.render(blackid, pid, 0, 0, 5, int16(y+ascent), line)
|
||||
y += step
|
||||
}
|
||||
|
||||
vis := float64(h-10) / float64(step)
|
||||
if vis < float64(len(lines)) {
|
||||
length := float64(step) * (vis + 1) * vis / float64(len(lines))
|
||||
start := float64(step) * float64(scroll) * vis / float64(len(lines))
|
||||
|
||||
_ = render.FillRectangles(X, render.PictOpSrc, pid,
|
||||
render.Color{Alpha: 0xffff}, []xproto.Rectangle{{
|
||||
X: int16(w - 15), Y: int16(start),
|
||||
Width: 15, Height: uint16(length + 10)}})
|
||||
}
|
||||
}
|
||||
|
||||
km, err := newKeyMapper(X)
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
for {
|
||||
ev, xerr := X.WaitForEvent()
|
||||
if xerr != nil {
|
||||
log.Printf("Error: %s\n", xerr)
|
||||
return
|
||||
}
|
||||
if ev == nil {
|
||||
return
|
||||
}
|
||||
|
||||
switch e := ev.(type) {
|
||||
case xproto.UnmapNotifyEvent:
|
||||
return
|
||||
|
||||
case xproto.ConfigureNotifyEvent:
|
||||
w, h = e.Width, e.Height
|
||||
|
||||
case xproto.MappingNotifyEvent:
|
||||
_ = km.update()
|
||||
|
||||
case xproto.KeyPressEvent:
|
||||
_ = xproto.ClearArea(X, true /* ExposeEvent */, wid, 0, 0, w, h)
|
||||
|
||||
const pageJump = 40
|
||||
switch km.decode(e) {
|
||||
case ksEscape:
|
||||
return
|
||||
case ksUp:
|
||||
if scroll >= 1 {
|
||||
scroll--
|
||||
}
|
||||
case ksDown:
|
||||
if scroll+1 < len(lines) {
|
||||
scroll++
|
||||
}
|
||||
case ksPageUp:
|
||||
if scroll >= pageJump {
|
||||
scroll -= pageJump
|
||||
}
|
||||
case ksPageDown:
|
||||
if scroll+pageJump < len(lines) {
|
||||
scroll += pageJump
|
||||
}
|
||||
}
|
||||
|
||||
case xproto.ButtonPressEvent:
|
||||
_ = xproto.ClearArea(X, true /* ExposeEvent */, wid, 0, 0, w, h)
|
||||
|
||||
switch e.Detail {
|
||||
case xproto.ButtonIndex4:
|
||||
if scroll > 0 {
|
||||
scroll--
|
||||
}
|
||||
case xproto.ButtonIndex5:
|
||||
if scroll+1 < len(lines) {
|
||||
scroll++
|
||||
}
|
||||
}
|
||||
|
||||
case xproto.ExposeEvent:
|
||||
// FIXME: The window's context haven't necessarily been destroyed.
|
||||
if e.Count == 0 {
|
||||
redraw()
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -1,156 +0,0 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"github.com/BurntSushi/xgb"
|
||||
"github.com/BurntSushi/xgb/xproto"
|
||||
"log"
|
||||
"math"
|
||||
"math/rand"
|
||||
)
|
||||
|
||||
func main() {
|
||||
X, err := xgb.NewConn()
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
setup := xproto.Setup(X)
|
||||
screen := setup.DefaultScreen(X)
|
||||
|
||||
var visual xproto.Visualid
|
||||
var depth byte
|
||||
for _, i := range screen.AllowedDepths {
|
||||
if i.Depth == 32 {
|
||||
// TODO: Could/should check other parameters.
|
||||
for _, v := range i.Visuals {
|
||||
if v.Class == xproto.VisualClassTrueColor {
|
||||
visual = v.VisualId
|
||||
depth = i.Depth
|
||||
break
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
if visual == 0 {
|
||||
log.Fatalln("cannot find an RGBA TrueColor visual")
|
||||
}
|
||||
|
||||
mid, err := xproto.NewColormapId(X)
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
_ = xproto.CreateColormap(
|
||||
X, xproto.ColormapAllocNone, mid, screen.Root, visual)
|
||||
|
||||
wid, err := xproto.NewWindowId(X)
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
// Border pixel and colormap are required when depth differs from parent.
|
||||
_ = xproto.CreateWindow(X, depth, wid, screen.Root,
|
||||
0, 0, 500, 500, 0, xproto.WindowClassInputOutput,
|
||||
visual, xproto.CwBorderPixel|xproto.CwColormap,
|
||||
[]uint32{0, uint32(mid)})
|
||||
|
||||
// This could be included in CreateWindow parameters.
|
||||
_ = xproto.ChangeWindowAttributes(X, wid,
|
||||
xproto.CwBackPixel|xproto.CwEventMask, []uint32{0x80808080,
|
||||
xproto.EventMaskStructureNotify | xproto.EventMaskKeyPress |
|
||||
xproto.EventMaskExposure})
|
||||
|
||||
title := "Gradient"
|
||||
_ = xproto.ChangeProperty(X, xproto.PropModeReplace, wid, xproto.AtomWmName,
|
||||
xproto.AtomString, 8, uint32(len(title)), []byte(title))
|
||||
|
||||
_ = xproto.MapWindow(X, wid)
|
||||
|
||||
cid, err := xproto.NewGcontextId(X)
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
_ = xproto.CreateGC(X, cid, xproto.Drawable(wid),
|
||||
xproto.GcGraphicsExposures, []uint32{0})
|
||||
|
||||
blend := func(a, b uint32, ratio, gamma float64) uint32 {
|
||||
iratio := 1 - ratio
|
||||
|
||||
fa := math.Pow(float64(a)/255, gamma)
|
||||
fb := math.Pow(float64(b)/255, gamma)
|
||||
|
||||
return uint32(math.Pow(ratio*fa+iratio*fb, 1/gamma)*255) & 0xff
|
||||
}
|
||||
|
||||
// TODO: We could show some text just like we intend to with xgb-xrender.go.
|
||||
|
||||
var w, h uint16
|
||||
var start, end uint32 = 0xabcdef, 0x32ab54
|
||||
gradient := func() {
|
||||
ra, ga, ba := (start>>16)&0xff, (start>>8)&0xff, start&0xff
|
||||
rb, gb, bb := (end>>16)&0xff, (end>>8)&0xff, end&0xff
|
||||
|
||||
var low, high uint16 = 50, h - 50
|
||||
if high > h {
|
||||
return
|
||||
}
|
||||
|
||||
for y := low; y < high; y++ {
|
||||
ratio := float64(y-low) / (float64(high) - float64(low))
|
||||
|
||||
rR := blend(ra, rb, ratio, 2.2)
|
||||
gG := blend(ga, gb, ratio, 2.2)
|
||||
bB := blend(ba, bb, ratio, 2.2)
|
||||
|
||||
_ = xproto.ChangeGC(X, cid, xproto.GcForeground,
|
||||
[]uint32{0xff000000 | rR<<16 | gG<<8 | bB})
|
||||
_ = xproto.PolyLine(X, xproto.CoordModeOrigin, xproto.Drawable(wid),
|
||||
cid, []xproto.Point{
|
||||
{X: 50, Y: int16(y)},
|
||||
{X: int16(w / 2), Y: int16(y)},
|
||||
})
|
||||
|
||||
rR = blend(ra, rb, ratio, 1)
|
||||
gG = blend(ga, gb, ratio, 1)
|
||||
bB = blend(ba, bb, ratio, 1)
|
||||
|
||||
_ = xproto.ChangeGC(X, cid, xproto.GcForeground,
|
||||
[]uint32{0xff000000 | rR<<16 | gG<<8 | bB})
|
||||
_ = xproto.PolyLine(X, xproto.CoordModeOrigin, xproto.Drawable(wid),
|
||||
cid, []xproto.Point{
|
||||
{X: int16(w / 2), Y: int16(y)},
|
||||
{X: int16(w - 50), Y: int16(y)},
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
for {
|
||||
ev, xerr := X.WaitForEvent()
|
||||
if xerr != nil {
|
||||
log.Printf("Error: %s\n", xerr)
|
||||
return
|
||||
}
|
||||
if ev == nil {
|
||||
return
|
||||
}
|
||||
|
||||
log.Printf("Event: %s\n", ev)
|
||||
switch e := ev.(type) {
|
||||
case xproto.UnmapNotifyEvent:
|
||||
return
|
||||
|
||||
case xproto.ConfigureNotifyEvent:
|
||||
w, h = e.Width, e.Height
|
||||
|
||||
case xproto.KeyPressEvent:
|
||||
start = rand.Uint32() & 0xffffff
|
||||
end = rand.Uint32() & 0xffffff
|
||||
gradient()
|
||||
|
||||
case xproto.ExposeEvent:
|
||||
gradient()
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
@ -1,397 +0,0 @@
|
||||
package main
|
||||
|
||||
// We could also easily use x/image/font/basicfont to load some glyphs into X,
|
||||
// relying on the fact that it is a vertical array of A8 masks. Though it only
|
||||
// supports ASCII and has but one size. Best just make a custom BDF loader,
|
||||
// those fonts have larger coverages and we would be in control. Though again,
|
||||
// they don't seem to be capable of antialiasing.
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"github.com/BurntSushi/xgb"
|
||||
"github.com/BurntSushi/xgb/render"
|
||||
"github.com/BurntSushi/xgb/xproto"
|
||||
// golang.org/x/image/font/opentype cannot render yet but the API is
|
||||
// more or less the same.
|
||||
"github.com/golang/freetype"
|
||||
"github.com/golang/freetype/truetype"
|
||||
"golang.org/x/image/font"
|
||||
"golang.org/x/image/font/gofont/goregular"
|
||||
"golang.org/x/image/math/fixed"
|
||||
"image"
|
||||
"image/draw"
|
||||
"log"
|
||||
"math/rand"
|
||||
)
|
||||
|
||||
func F64ToFixed(f float64) render.Fixed { return render.Fixed(f * 65536) }
|
||||
func FixedToF64(f render.Fixed) float64 { return float64(f) / 65536 }
|
||||
|
||||
func glyphListBytes(buf []byte, runes []rune, size int) int {
|
||||
b := 0
|
||||
for _, r := range runes {
|
||||
switch size {
|
||||
default:
|
||||
buf[b] = byte(r)
|
||||
b += 1
|
||||
case 2:
|
||||
xgb.Put16(buf[b:], uint16(r))
|
||||
b += 2
|
||||
case 4:
|
||||
xgb.Put32(buf[b:], uint32(r))
|
||||
b += 4
|
||||
}
|
||||
}
|
||||
return xgb.Pad(b)
|
||||
}
|
||||
|
||||
// When the len is 255, a GLYPHABLE follows, otherwise a list of CARD8/16/32.
|
||||
func glyphEltHeaderBytes(buf []byte, len byte, deltaX, deltaY int16) int {
|
||||
b := 0
|
||||
buf[b] = len
|
||||
b += 4
|
||||
xgb.Put16(buf[b:], uint16(deltaX))
|
||||
b += 2
|
||||
xgb.Put16(buf[b:], uint16(deltaY))
|
||||
b += 2
|
||||
return xgb.Pad(b)
|
||||
}
|
||||
|
||||
type xgbCookie interface{ Check() error }
|
||||
|
||||
// TODO: We actually need a higher-level function that also keeps track of
|
||||
// and loads glyphs into the X server.
|
||||
// TODO: We also need a way to use kerning tables with this, inserting/removing
|
||||
// advance pixels between neighboring characters.
|
||||
|
||||
// compositeString makes an appropriate render.CompositeGlyphs request,
|
||||
// assuming that glyphs equal Unicode codepoints.
|
||||
func compositeString(c *xgb.Conn, op byte, src, dst render.Picture,
|
||||
maskFormat render.Pictformat, glyphset render.Glyphset, srcX, srcY int16,
|
||||
destX, destY int16, text string) xgbCookie {
|
||||
runes := []rune(text)
|
||||
|
||||
var highest rune
|
||||
for _, r := range runes {
|
||||
if r > highest {
|
||||
highest = r
|
||||
}
|
||||
}
|
||||
|
||||
size := 1
|
||||
switch {
|
||||
case highest > 1<<16:
|
||||
size = 4
|
||||
case highest > 1<<8:
|
||||
size = 2
|
||||
}
|
||||
|
||||
// They gave up on the XCB protocol API and we need to serialize explicitly.
|
||||
|
||||
// To spare us from caring about the padding, use the largest number lesser
|
||||
// than 255 that is divisible by 4 (for size 2 and 4 the requirements are
|
||||
// less strict but this works in the general case).
|
||||
const maxPerChunk = 252
|
||||
|
||||
buf := make([]byte, (len(runes)+maxPerChunk-1)/maxPerChunk*8+len(runes)*size)
|
||||
b := 0
|
||||
|
||||
for len(runes) > maxPerChunk {
|
||||
b += glyphEltHeaderBytes(buf[b:], maxPerChunk, 0, 0)
|
||||
b += glyphListBytes(buf[b:], runes[:maxPerChunk], size)
|
||||
runes = runes[maxPerChunk:]
|
||||
}
|
||||
if len(runes) > 0 {
|
||||
b += glyphEltHeaderBytes(buf[b:], byte(len(runes)), destX, destY)
|
||||
b += glyphListBytes(buf[b:], runes, size)
|
||||
}
|
||||
|
||||
switch size {
|
||||
default:
|
||||
return render.CompositeGlyphs8(c, op, src, dst, maskFormat, glyphset,
|
||||
srcX, srcY, buf)
|
||||
case 2:
|
||||
return render.CompositeGlyphs16(c, op, src, dst, maskFormat, glyphset,
|
||||
srcX, srcY, buf)
|
||||
case 4:
|
||||
return render.CompositeGlyphs32(c, op, src, dst, maskFormat, glyphset,
|
||||
srcX, srcY, buf)
|
||||
}
|
||||
}
|
||||
|
||||
func main() {
|
||||
X, err := xgb.NewConn()
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
if err := render.Init(X); err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
setup := xproto.Setup(X)
|
||||
screen := setup.DefaultScreen(X)
|
||||
|
||||
var visual xproto.Visualid
|
||||
var depth byte
|
||||
for _, i := range screen.AllowedDepths {
|
||||
if i.Depth == 32 {
|
||||
// TODO: Could/should check other parameters.
|
||||
for _, v := range i.Visuals {
|
||||
if v.Class == xproto.VisualClassTrueColor {
|
||||
visual = v.VisualId
|
||||
depth = i.Depth
|
||||
break
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
if visual == 0 {
|
||||
log.Fatalln("cannot find an RGBA TrueColor visual")
|
||||
}
|
||||
|
||||
mid, err := xproto.NewColormapId(X)
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
_ = xproto.CreateColormap(
|
||||
X, xproto.ColormapAllocNone, mid, screen.Root, visual)
|
||||
|
||||
wid, err := xproto.NewWindowId(X)
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
// Border pixel and colormap are required when depth differs from parent.
|
||||
_ = xproto.CreateWindow(X, depth, wid, screen.Root,
|
||||
0, 0, 500, 500, 0, xproto.WindowClassInputOutput,
|
||||
visual, xproto.CwBorderPixel|xproto.CwColormap,
|
||||
[]uint32{0, uint32(mid)})
|
||||
|
||||
// This could be included in CreateWindow parameters.
|
||||
_ = xproto.ChangeWindowAttributes(X, wid,
|
||||
xproto.CwBackPixel|xproto.CwEventMask, []uint32{0x80808080,
|
||||
xproto.EventMaskStructureNotify | xproto.EventMaskKeyPress |
|
||||
xproto.EventMaskExposure})
|
||||
|
||||
title := []byte("Gradient")
|
||||
_ = xproto.ChangeProperty(X, xproto.PropModeReplace, wid, xproto.AtomWmName,
|
||||
xproto.AtomString, 8, uint32(len(title)), title)
|
||||
|
||||
_ = xproto.MapWindow(X, wid)
|
||||
|
||||
/*
|
||||
rfilters, err := render.QueryFilters(X, xproto.Drawable(wid)).Reply()
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
filters := []string{}
|
||||
for _, f := range rfilters.Filters {
|
||||
filters = append(filters, f.Name)
|
||||
}
|
||||
|
||||
log.Printf("filters: %v\n", filters)
|
||||
*/
|
||||
|
||||
pformats, err := render.QueryPictFormats(X).Reply()
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
/*
|
||||
for _, pf := range pformats.Formats {
|
||||
log.Printf("format %2d: depth %2d, RGBA %3x %3x %3x %3x\n",
|
||||
pf.Id, pf.Depth,
|
||||
pf.Direct.RedMask, pf.Direct.GreenMask, pf.Direct.BlueMask,
|
||||
pf.Direct.AlphaMask)
|
||||
}
|
||||
*/
|
||||
|
||||
// Similar to XRenderFindVisualFormat.
|
||||
// The DefaultScreen is almost certain to be zero.
|
||||
var pformat render.Pictformat
|
||||
for _, pd := range pformats.Screens[X.DefaultScreen].Depths {
|
||||
// This check seems to be slightly extraneous.
|
||||
if pd.Depth != depth {
|
||||
continue
|
||||
}
|
||||
for _, pv := range pd.Visuals {
|
||||
if pv.Visual == visual {
|
||||
pformat = pv.Format
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// ...or just scan through pformats.Formats and look for matches, which is
|
||||
// what XRenderFindStandardFormat in Xlib does as well as exp/shiny.
|
||||
|
||||
f, err := freetype.ParseFont(goregular.TTF)
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
// LCD subpixel rendering isn't supported. :(
|
||||
opts := &truetype.Options{
|
||||
Size: 10,
|
||||
DPI: 96, // TODO: Take this from the screen or monitor.
|
||||
Hinting: font.HintingFull,
|
||||
}
|
||||
face := truetype.NewFace(f, opts)
|
||||
bounds := f.Bounds(fixed.Int26_6(opts.Size * float64(opts.DPI) *
|
||||
(64.0 / 72.0)))
|
||||
|
||||
var rgbFormat render.Pictformat
|
||||
for _, pf := range pformats.Formats {
|
||||
// Hopefully. Might want to check byte order.
|
||||
if pf.Depth == 32 && pf.Direct.AlphaMask != 0 {
|
||||
rgbFormat = pf.Id
|
||||
break
|
||||
}
|
||||
}
|
||||
|
||||
gsid, err := render.NewGlyphsetId(X)
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
// NOTE: A depth of 24 will not work, the server always rejects it.
|
||||
// Composite alpha doesn't make sense since golang/freetype can't use it.
|
||||
// We use RGBA here just so that lines are padded to 32 bits.
|
||||
_ = render.CreateGlyphSet(X, gsid, rgbFormat)
|
||||
|
||||
// NOTE: We could do gamma post-correction in higher precision if we
|
||||
// implemented our own clone of the image.Image implementation.
|
||||
nrgb := image.NewRGBA(image.Rect(
|
||||
+bounds.Min.X.Floor(),
|
||||
-bounds.Min.Y.Floor(),
|
||||
+bounds.Max.X.Ceil(),
|
||||
-bounds.Max.Y.Ceil(),
|
||||
))
|
||||
|
||||
for r := rune(32); r < 128; r++ {
|
||||
dr, mask, maskp, advance, ok := face.Glyph(
|
||||
fixed.P(0, 0) /* subpixel destination location */, r)
|
||||
if !ok {
|
||||
log.Println("skip")
|
||||
continue
|
||||
}
|
||||
|
||||
for i := 0; i < len(nrgb.Pix); i++ {
|
||||
nrgb.Pix[i] = 0
|
||||
}
|
||||
|
||||
draw.Draw(nrgb, dr, mask, maskp, draw.Src)
|
||||
|
||||
_ = render.AddGlyphs(X, gsid, 1, []uint32{uint32(r)},
|
||||
[]render.Glyphinfo{{
|
||||
Width: uint16(nrgb.Rect.Size().X),
|
||||
Height: uint16(nrgb.Rect.Size().Y),
|
||||
X: int16(-bounds.Min.X.Floor()),
|
||||
Y: int16(+bounds.Max.Y.Ceil()),
|
||||
XOff: int16(advance.Ceil()),
|
||||
YOff: int16(0),
|
||||
}}, []byte(nrgb.Pix))
|
||||
}
|
||||
|
||||
pid, err := render.NewPictureId(X)
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
// Dithering is not supported. :(
|
||||
render.CreatePicture(X, pid, xproto.Drawable(wid), pformat, 0, []uint32{})
|
||||
|
||||
// Reserve an ID for the gradient.
|
||||
gid, err := render.NewPictureId(X)
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
whiteid, err := render.NewPictureId(X)
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
_ = render.CreateSolidFill(X, whiteid, render.Color{
|
||||
Red: 0xffff,
|
||||
Green: 0xffff,
|
||||
Blue: 0xffff,
|
||||
Alpha: 0xffff,
|
||||
})
|
||||
|
||||
var from, to render.Color
|
||||
var start, end uint32
|
||||
recolor := func() {
|
||||
start = rand.Uint32() & 0xffffff
|
||||
from = render.Color{
|
||||
Red: 0x101 * uint16((start>>16)&0xff),
|
||||
Green: 0x101 * uint16((start>>8)&0xff),
|
||||
Blue: 0x101 * uint16(start&0xff),
|
||||
Alpha: 0xffff,
|
||||
}
|
||||
|
||||
end = rand.Uint32() & 0xffffff
|
||||
to = render.Color{
|
||||
Red: 0x101 * uint16((end>>16)&0xff),
|
||||
Green: 0x101 * uint16((end>>8)&0xff),
|
||||
Blue: 0x101 * uint16(end&0xff),
|
||||
Alpha: 0xffff,
|
||||
}
|
||||
}
|
||||
|
||||
var w, h uint16
|
||||
gradient := func() {
|
||||
if w < 100 || h < 100 {
|
||||
return
|
||||
}
|
||||
|
||||
// We could also use a transformation matrix for changes in size.
|
||||
_ = render.CreateLinearGradient(X, gid,
|
||||
render.Pointfix{F64ToFixed(0), F64ToFixed(0)},
|
||||
render.Pointfix{F64ToFixed(0), F64ToFixed(float64(h) - 100)},
|
||||
2, []render.Fixed{F64ToFixed(0), F64ToFixed(1)},
|
||||
[]render.Color{from, to})
|
||||
|
||||
_ = render.Composite(X, render.PictOpSrc, gid, render.PictureNone, pid,
|
||||
0, 0, 0, 0, 50, 50, w-100, h-100)
|
||||
|
||||
_ = render.FreePicture(X, gid)
|
||||
|
||||
_ = compositeString(X, render.PictOpOver, whiteid, pid,
|
||||
0 /* TODO: mask Pictureformat? */, gsid, 0, 0, 100, 100,
|
||||
fmt.Sprintf("%#06x - %#06x", start, end))
|
||||
_ = compositeString(X, render.PictOpOver, whiteid, pid,
|
||||
0 /* TODO: mask Pictureformat? */, gsid, 0, 0, 100, 150,
|
||||
"The quick brown fox jumps over the lazy dog.")
|
||||
}
|
||||
|
||||
for {
|
||||
ev, xerr := X.WaitForEvent()
|
||||
if xerr != nil {
|
||||
log.Printf("Error: %s\n", xerr)
|
||||
return
|
||||
}
|
||||
if ev == nil {
|
||||
return
|
||||
}
|
||||
|
||||
log.Printf("Event: %s\n", ev)
|
||||
switch e := ev.(type) {
|
||||
case xproto.UnmapNotifyEvent:
|
||||
return
|
||||
|
||||
case xproto.ConfigureNotifyEvent:
|
||||
w, h = e.Width, e.Height
|
||||
recolor()
|
||||
|
||||
case xproto.KeyPressEvent:
|
||||
recolor()
|
||||
gradient()
|
||||
|
||||
case xproto.ExposeEvent:
|
||||
gradient()
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
x
Reference in New Issue
Block a user