Mercurial > vba-clojure

     1 (ns com.aurellem.gb-funs

     2     (:import com.aurellem.gb.Gb)

     3     (:import java.io.File)

     4     (:import org.apache.commons.io.FileUtils)

     5     (:import (java.nio IntBuffer ByteOrder)))

     6 

     7 ;; Savestates

     8 (defrecord SaveState [frame data])

     9 

    10 (def ^:dynamic *save-state-cache*

    11   (File. "/home/r/proj/pokemon-escape/save-states/"))

    12 

    13 (defn frame->filename [frame]

    14   (File. *save-state-cache* (format "%07d.sav" frame)))

    15   

    16 (defn write-save! [^SaveState save]

    17   (let [buf (:data save)

    18         bytes (byte-array (.limit buf))

    19         dest (frame->filename (:frame save))]

    20     (.get buf bytes)

    21     (FileUtils/writeByteArrayToFile dest bytes)

    22     (.rewind buf)

    23     save))

    24 

    25 (defn read-save [frame]

    26   (let [save (frame->filename frame)]

    27     (if (.exists save)

    28       (let [buf (Gb/saveBuffer)

    29             bytes (FileUtils/readFileToByteArray save)]

    30         (.put buf bytes)

    31         (.flip buf)

    32         (SaveState. frame buf)))))

    33 ;;;;;;;;;;;;;;;;

    34 

    35 ;; Gameboy management

    36 (Gb/loadVBA)

    37 

    38 (def yellow-rom-image

    39   (File. "/home/r/proj/pokemon-escape/roms/yellow.gbc"))

    40 

    41 (def yellow-save-file

    42   (File. "/home/r/proj/pokemon-escape/roms/yellow.sav"))

    43 

    44 (def on? (atom nil))

    45 

    46 (defn shutdown! [] (Gb/shutdown) (reset! on? false))

    47 

    48 (defn restart! []

    49   (shutdown!)

    50   (.delete yellow-save-file)

    51   (Gb/startEmulator (.getCanonicalPath yellow-rom-image))

    52   (reset! on? true))

    53 

    54 ;;; The first state!

    55 (defn gen-root! []

    56   (restart!)

    57   (write-save! (SaveState. 0  (Gb/saveState))))

    58 

    59 (defn root []

    60   (if (.exists (frame->filename 0))

    61     (read-save 0)

    62     (gen-root!)))

    63 

    64 ;;;; Press Buttons

    65 

    66 (def button-code

    67   {;; main buttons

    68    :a         0x0001

    69    :b         0x0002

    70 

    71    ;; directional pad

    72    :r         0x0010

    73    :l         0x0020

    74    :u         0x0040

    75    :d         0x0080

    76 

    77    ;; meta buttons

    78    :select    0x0004

    79    :start     0x0008

    80 

    81    ;; pseudo-buttons

    82    :restart   0x0800 ; hard reset -- not really a button

    83    :listen -1        ; listen for user input

    84    })

    85 

    86 (defn button-mask [buttons]

    87   (reduce bit-or 0x0000 (map button-code buttons)))

    88 

    89 (def current-state (atom nil))

    90 

    91 (defn step

    92   ([^SaveState state buttons]

    93      (if (not @on?) (restart!))

    94      (if (not= @current-state state)

    95        (Gb/loadState (:data state)))

    96      (Gb/step (button-mask buttons))

    97      (reset! current-state 

    98              (SaveState. (inc (:frame state))(Gb/saveState)))))

    99 

   100 (defn play

   101   ([^SaveState state]

   102      (step state [:listen]))

   103   ([] (step (if @current-state @current-state (root)))))

   104
author	Robert McIntyre <rlm@mit.edu>
date	Fri, 09 Mar 2012 19:18:00 -0600
parents
children	26f002f2868c