package main import ( "fmt" "github.com/kch42/gomcmap/mcmap" "github.com/mattn/go-gtk/gdk" "github.com/mattn/go-gtk/glib" "github.com/mattn/go-gtk/gtk" "math" "unsafe" ) const ( zoom = 2 tileSize = zoom * mcmap.ChunkSizeXZ cacheSize = 4 ) type tileCmd int const ( cmdUpdateTiles tileCmd = iota cmdFlushTiles cmdSave ) func renderTile(chunk *mcmap.Chunk) (maptile, biotile *gdk.Pixmap, biocache []mcmap.Biome) { maptile = emptyPixmap(tileSize, tileSize, 24) mtDrawable := maptile.GetDrawable() mtGC := gdk.NewGC(mtDrawable) biotile = emptyPixmap(tileSize, tileSize, 24) btDrawable := biotile.GetDrawable() btGC := gdk.NewGC(btDrawable) biocache = make([]mcmap.Biome, mcmap.ChunkRectXZ) i := 0 for z := 0; z < mcmap.ChunkSizeXZ; z++ { scanX: for x := 0; x < mcmap.ChunkSizeXZ; x++ { bio := chunk.Biome(x, z) btGC.SetRgbFgColor(bioColors[bio]) btDrawable.DrawRectangle(btGC, true, x*zoom, z*zoom, zoom, zoom) biocache[i] = bio i++ for y := chunk.Height(x, z); y >= 0; y-- { if col, ok := blockColors[chunk.Block(x, y, z).ID]; ok { mtGC.SetRgbFgColor(col) mtDrawable.DrawRectangle(mtGC, true, x*zoom, z*zoom, zoom, zoom) continue scanX } } mtGC.SetRgbFgColor(gdk.NewColor("#ffffff")) mtDrawable.DrawRectangle(mtGC, true, x*zoom, z*zoom, zoom, zoom) } } return } type MapWidget struct { dArea *gtk.DrawingArea w, h int reportFail func(msg string) updateInfo func(x, z int, bio mcmap.Biome) isInit bool showBiomes bool offX, offZ int mx1, mx2, my1, my2 int primMButton, middleMButton bool pixmap *gdk.Pixmap pixmapGC *gdk.GC gdkwin *gdk.Window bg *gdk.Pixmap region *CachedRegion maptiles map[XZPos]*gdk.Pixmap biotiles map[XZPos]*gdk.Pixmap bioCache map[XZPos][]mcmap.Biome redraw chan bool tileCmds chan tileCmd tool Tool bio mcmap.Biome } var ( checker1 = gdk.NewColor("#222222") checker2 = gdk.NewColor("#444444") ) func emptyPixmap(w, h, depth int) *gdk.Pixmap { return gdk.NewPixmap(new(gdk.Drawable), w, h, depth) } func (mw *MapWidget) SetShowBiomes(b bool) { mw.showBiomes = b mw.redraw <- true } func (mw *MapWidget) SetTool(t Tool) { mw.tool = t } func (mw *MapWidget) SetBiome(bio mcmap.Biome) { mw.bio = bio } func (mw *MapWidget) DArea() *gtk.DrawingArea { return mw.dArea } func (mw *MapWidget) doTileCmds() { for cmd := range mw.tileCmds { switch cmd { case cmdSave: if err := mw.region.Flush(); err != nil { mw.reportFail(fmt.Sprintf("Error while flushing cache: %s", err)) return } if err := mw.region.Region.Save(); err != nil { mw.reportFail(fmt.Sprintf("Error while saving: %s", err)) return } case cmdFlushTiles: if err := mw.region.Flush(); err != nil { mw.reportFail(fmt.Sprintf("Error while flushing cache: %s", err)) return } gdk.ThreadsEnter() for _, mt := range mw.maptiles { mt.Unref() } for _, bt := range mw.biotiles { bt.Unref() } gdk.ThreadsLeave() mw.maptiles = make(map[XZPos]*gdk.Pixmap) mw.biotiles = make(map[XZPos]*gdk.Pixmap) mw.bioCache = make(map[XZPos][]mcmap.Biome) case cmdUpdateTiles: todelete := make(map[XZPos]bool) startX := int(math.Floor(float64(mw.offX) / tileSize)) startZ := int(math.Floor(float64(mw.offZ) / tileSize)) endX := int(math.Ceil(float64(mw.offX+mw.w) / tileSize)) endZ := int(math.Ceil(float64(mw.offZ+mw.h) / tileSize)) for pos := range mw.maptiles { if (pos.X < startX) || (pos.Z < startZ) || (pos.X >= endX) || (pos.Z >= endZ) { todelete[pos] = true } } gdk.ThreadsEnter() for pos := range todelete { if tile, ok := mw.maptiles[pos]; ok { tile.Unref() delete(mw.maptiles, pos) } if tile, ok := mw.biotiles[pos]; ok { tile.Unref() delete(mw.biotiles, pos) } if _, ok := mw.bioCache[pos]; ok { delete(mw.bioCache, pos) } } if mw.region != nil { for z := startZ; z < endZ; z++ { scanX: for x := startX; x < endX; x++ { pos := XZPos{x, z} if _, ok := mw.biotiles[pos]; ok { continue scanX } chunk, err := mw.region.Chunk(x, z) switch err { case nil: case mcmap.NotAvailable: continue scanX default: mw.reportFail(fmt.Sprintf("Could not get chunk %d, %d: %s", x, z, err)) return } mw.maptiles[pos], mw.biotiles[pos], mw.bioCache[pos] = renderTile(chunk) chunk.MarkUnused() gdk.ThreadsLeave() mw.redraw <- true gdk.ThreadsEnter() } } } gdk.ThreadsLeave() } } } func (mw *MapWidget) configure() { if mw.pixmap != nil { mw.pixmap.Unref() } alloc := mw.dArea.GetAllocation() mw.w = alloc.Width mw.h = alloc.Height if !mw.isInit { mw.offX = -(mw.w / 2) mw.offZ = -(mw.h / 2) mw.isInit = true } mw.pixmap = gdk.NewPixmap(mw.dArea.GetWindow().GetDrawable(), mw.w, mw.h, 24) mw.pixmapGC = gdk.NewGC(mw.pixmap.GetDrawable()) mw.drawBg() gdk.ThreadsLeave() mw.redraw <- true gdk.ThreadsEnter() } func (mw *MapWidget) drawBg() { if mw.bg != nil { mw.bg.Unref() } mw.bg = emptyPixmap(mw.w, mw.h, 24) drawable := mw.bg.GetDrawable() gc := gdk.NewGC(drawable) w := int(math.Ceil(float64(mw.w) / 32)) h := int(math.Ceil(float64(mw.h) / 32)) for y := 0; y < h; y++ { for x := 0; x < w; x++ { if (x % 2) == (y % 2) { gc.SetRgbFgColor(checker1) } else { gc.SetRgbFgColor(checker2) } drawable.DrawRectangle(gc, true, x*32, y*32, 32, 32) } } } func (mw *MapWidget) compose() { drawable := mw.pixmap.GetDrawable() gc := mw.pixmapGC drawable.DrawDrawable(gc, mw.bg.GetDrawable(), 0, 0, 0, 0, -1, -1) var tiles map[XZPos]*gdk.Pixmap if mw.showBiomes { tiles = mw.biotiles } else { tiles = mw.maptiles } for pos, tile := range tiles { x := (pos.X * tileSize) - mw.offX y := (pos.Z * tileSize) - mw.offZ drawable.DrawDrawable(gc, tile.GetDrawable(), 0, 0, x, y, tileSize, tileSize) } } func (mw *MapWidget) movement(ctx *glib.CallbackContext) { if mw.gdkwin == nil { mw.gdkwin = mw.dArea.GetWindow() } arg := ctx.Args(0) mev := *(**gdk.EventMotion)(unsafe.Pointer(&arg)) var mt gdk.ModifierType if mev.IsHint != 0 { mw.gdkwin.GetPointer(&(mw.mx2), &(mw.my2), &mt) } else { mw.mx2, mw.my2 = int(mev.X), int(mev.Y) } x := (mw.offX + mw.mx2) / zoom z := (mw.offZ + mw.my2) / zoom cx, cz, cbx, cbz := mcmap.BlockToChunk(x, z) bio := mcmap.Biome(mcmap.BioUncalculated) if bc, ok := mw.bioCache[XZPos{cx, cz}]; ok { bio = bc[cbz*mcmap.ChunkSizeXZ+cbx] } mw.updateInfo(x, z, bio) if mw.middleMButton { if (mw.mx1 != -1) && (mw.my1 != -1) { mw.offX += mw.mx1 - mw.mx2 mw.offZ += mw.my1 - mw.my2 gdk.ThreadsLeave() mw.tileCmds <- cmdUpdateTiles gdk.ThreadsEnter() } } if mw.primMButton { mw.tool.Do(mw.bio, mw, x, z) gdk.ThreadsLeave() mw.redraw <- true gdk.ThreadsEnter() } mw.mx1, mw.my1 = mw.mx2, mw.my2 } func (mw *MapWidget) buttonChanged(ctx *glib.CallbackContext) { arg := ctx.Args(0) bev := *(**gdk.EventButton)(unsafe.Pointer(&arg)) switch gdk.EventType(bev.Type) { case gdk.BUTTON_RELEASE: mw.primMButton, mw.middleMButton = false, false case gdk.BUTTON_PRESS: switch bev.Button { case 1: if mw.region == nil { return } x := (mw.offX + int(bev.X)) / zoom z := (mw.offZ + int(bev.Y)) / zoom mw.tool.Do(mw.bio, mw, x, z) gdk.ThreadsLeave() mw.redraw <- true gdk.ThreadsEnter() if !mw.tool.SingleClick() { mw.primMButton = true } case 2: mw.middleMButton = true } } } func (mw *MapWidget) expose() { mw.dArea.GetWindow().GetDrawable().DrawDrawable(mw.pixmapGC, mw.pixmap.GetDrawable(), 0, 0, 0, 0, -1, -1) } func (mw *MapWidget) guiUpdater() { for _ = range mw.redraw { gdk.ThreadsEnter() mw.compose() mw.expose() mw.dArea.GetWindow().Invalidate(nil, false) gdk.ThreadsLeave() } } func (mw *MapWidget) init() { mw.redraw = make(chan bool) mw.tileCmds = make(chan tileCmd) mw.maptiles = make(map[XZPos]*gdk.Pixmap) mw.biotiles = make(map[XZPos]*gdk.Pixmap) mw.bioCache = make(map[XZPos][]mcmap.Biome) mw.showBiomes = true mw.mx1, mw.my1 = -1, -1 go mw.doTileCmds() go mw.guiUpdater() mw.dArea = gtk.NewDrawingArea() mw.dArea.Connect("configure-event", mw.configure) mw.dArea.Connect("expose-event", mw.expose) mw.dArea.Connect("motion-notify-event", mw.movement) mw.dArea.Connect("button-press-event", mw.buttonChanged) mw.dArea.Connect("button-release-event", mw.buttonChanged) mw.dArea.SetEvents(int(gdk.POINTER_MOTION_MASK | gdk.POINTER_MOTION_HINT_MASK | gdk.BUTTON_PRESS_MASK | gdk.BUTTON_RELEASE_MASK)) } func (mw *MapWidget) setRegion(region *mcmap.Region) { mw.tileCmds <- cmdFlushTiles mw.region = NewCachedRegion(region, cacheSize) mw.tileCmds <- cmdUpdateTiles } func (mw *MapWidget) GetBiomeAt(x, z int) (mcmap.Biome, bool) { cx, cz, bx, bz := mcmap.BlockToChunk(x, z) pos := XZPos{cx, cz} if bc, ok := mw.bioCache[pos]; ok { return bc[bz*mcmap.ChunkSizeXZ+bx], true } chunk, err := mw.region.Chunk(cx, cz) switch err { case nil: case mcmap.NotAvailable: return mcmap.BioUncalculated, false default: mw.reportFail(fmt.Sprintf("Error while getting chunk %d, %d: %s", cx, cz, err)) return mcmap.BioUncalculated, false } bc := make([]mcmap.Biome, mcmap.ChunkRectXZ) i := 0 for z := 0; z < mcmap.ChunkSizeXZ; z++ { for x := 0; x < mcmap.ChunkSizeXZ; x++ { bc[i] = chunk.Biome(x, z) i++ } } mw.bioCache[pos] = bc return chunk.Biome(bx, bz), true } func (mw *MapWidget) SetBiomeAt(x, z int, bio mcmap.Biome) { cx, cz, bx, bz := mcmap.BlockToChunk(x, z) pos := XZPos{cx, cz} chunk, err := mw.region.Chunk(cx, cz) switch err { case nil: case mcmap.NotAvailable: return default: mw.reportFail(fmt.Sprintf("Error while getting chunk %d, %d: %s", cx, cz, err)) return } chunk.SetBiome(bx, bz, bio) chunk.MarkModified() // Update cache if bc, ok := mw.bioCache[pos]; ok { bc[bz*mcmap.ChunkSizeXZ+bx] = bio } // Update tile if tile, ok := mw.biotiles[pos]; ok { drawable := tile.GetDrawable() gc := gdk.NewGC(drawable) gc.SetRgbFgColor(bioColors[bio]) drawable.DrawRectangle(gc, true, bx*zoom, bz*zoom, zoom, zoom) } } func NewMapWidget(reportFail func(msg string), updateInfo func(x, z int, bio mcmap.Biome)) *MapWidget { mw := &MapWidget{reportFail: reportFail, updateInfo: updateInfo} mw.init() return mw }