rlm@83: (ns com.aurellem.gb-funs
rlm@83:     (:import com.aurellem.gb.Gb)
rlm@83:     (:import java.io.File)
rlm@83:     (:import org.apache.commons.io.FileUtils)
rlm@83:     (:import (java.nio IntBuffer ByteOrder)))
rlm@83: 
rlm@83: ;; Savestates
rlm@83: (defrecord SaveState [frame data])
rlm@83: 
rlm@83: (def ^:dynamic *save-state-cache*
rlm@83:   (File. "/home/r/proj/pokemon-escape/save-states/"))
rlm@83: 
rlm@83: (defn frame->filename [frame]
rlm@83:   (File. *save-state-cache* (format "%07d.sav" frame)))
rlm@83:   
rlm@83: (defn write-save! [^SaveState save]
rlm@83:   (let [buf (:data save)
rlm@83:         bytes (byte-array (.limit buf))
rlm@83:         dest (frame->filename (:frame save))]
rlm@83:     (.get buf bytes)
rlm@83:     (FileUtils/writeByteArrayToFile dest bytes)
rlm@83:     (.rewind buf)
rlm@83:     save))
rlm@83: 
rlm@83: (defn read-save [frame]
rlm@83:   (let [save (frame->filename frame)]
rlm@83:     (if (.exists save)
rlm@83:       (let [buf (Gb/saveBuffer)
rlm@83:             bytes (FileUtils/readFileToByteArray save)]
rlm@83:         (.put buf bytes)
rlm@83:         (.flip buf)
rlm@83:         (SaveState. frame buf)))))
rlm@83: ;;;;;;;;;;;;;;;;
rlm@83: 
rlm@83: ;; Gameboy management
rlm@83: (Gb/loadVBA)
rlm@83: 
rlm@83: (def yellow-rom-image
rlm@83:   (File. "/home/r/proj/pokemon-escape/roms/yellow.gbc"))
rlm@83: 
rlm@83: (def yellow-save-file
rlm@83:   (File. "/home/r/proj/pokemon-escape/roms/yellow.sav"))
rlm@83: 
rlm@83: (def on? (atom nil))
rlm@83: 
rlm@83: (defn shutdown! [] (Gb/shutdown) (reset! on? false))
rlm@83: 
rlm@83: (defn restart! []
rlm@83:   (shutdown!)
rlm@83:   (.delete yellow-save-file)
rlm@83:   (Gb/startEmulator (.getCanonicalPath yellow-rom-image))
rlm@83:   (reset! on? true))
rlm@83: 
rlm@83: ;;; The first state!
rlm@83: (defn gen-root! []
rlm@83:   (restart!)
rlm@83:   (write-save! (SaveState. 0  (Gb/saveState))))
rlm@83: 
rlm@83: (defn root []
rlm@83:   (if (.exists (frame->filename 0))
rlm@83:     (read-save 0)
rlm@83:     (gen-root!)))
rlm@83: 
rlm@83: ;;;; Press Buttons
rlm@83: 
rlm@83: (def button-code
rlm@83:   {;; main buttons
rlm@83:    :a         0x0001
rlm@83:    :b         0x0002
rlm@83: 
rlm@83:    ;; directional pad
rlm@83:    :r         0x0010
rlm@83:    :l         0x0020
rlm@83:    :u         0x0040
rlm@83:    :d         0x0080
rlm@83: 
rlm@83:    ;; meta buttons
rlm@83:    :select    0x0004
rlm@83:    :start     0x0008
rlm@83: 
rlm@83:    ;; pseudo-buttons
rlm@83:    :restart   0x0800 ; hard reset -- not really a button
rlm@83:    :listen -1        ; listen for user input
rlm@83:    })
rlm@83: 
rlm@83: (defn button-mask [buttons]
rlm@83:   (reduce bit-or 0x0000 (map button-code buttons)))
rlm@83: 
rlm@83: (def current-state (atom nil))
rlm@83: 
rlm@83: (defn step
rlm@83:   ([^SaveState state buttons]
rlm@83:      (if (not @on?) (restart!))
rlm@83:      (if (not= @current-state state)
rlm@83:        (Gb/loadState (:data state)))
rlm@83:      (Gb/step (button-mask buttons))
rlm@83:      (reset! current-state 
rlm@83:              (SaveState. (inc (:frame state))(Gb/saveState)))))
rlm@83: 
rlm@83: (defn play
rlm@83:   ([^SaveState state]
rlm@83:      (step state [:listen]))
rlm@83:   ([] (step (if @current-state @current-state (root)))))
rlm@83: