Mercurial > vba-clojure

     1 (ns com.aurellem.gb-driver

     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-state! [^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     dest))

    24 

    25 (defn read-state [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   (let [state (SaveState. 0  (Gb/saveState))]

    58     (write-state! state)

    59     state))

    60 

    61 (defn root []

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

    63     (read-state 0)

    64     (gen-root!)))

    65 

    66 ;;;; Press Buttons

    67 

    68 (def button-code

    69   {;; main buttons

    70    :a         0x0001

    71    :b         0x0002

    72 

    73    ;; directional pad

    74    :r         0x0010

    75    :l         0x0020

    76    :u         0x0040

    77    :d         0x0080

    78 

    79    ;; meta buttons

    80    :select    0x0004

    81    :start     0x0008

    82 

    83    ;; pseudo-buttons

    84    :restart   0x0800 ; hard reset 

    85    :listen -1        ; listen for user input

    86    })

    87 

    88 (defn button-mask [buttons]

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

    90 

    91 (def current-state (atom nil))

    92 

    93 (defn set-state! [^SaveState state]

    94   (assert (:data state) "Not a valid state!")

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

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

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

    98   (reset! current-state state))

    99 

   100 (defrecord Move [keys state])

   101 

   102 (defn update-state []

   103   (reset! current-state

   104           (SaveState. (:frame @current-state)

   105                       (Gb/saveState))))

   106 

   107 (defn step

   108   ([^SaveState state buttons]

   109      (set-state! state)

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

   111      (reset! current-state 

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

   113   ([^SaveState state]

   114      (step state [:listen]))

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

   116 

   117 (defn tick

   118   ([] (tick @current-state))

   119   ([state]

   120      (set-state! state)

   121      (Gb/tick)

   122      (update-state)))

   123 

   124 (defn move

   125   [^Move move buttons]

   126   (Move. (step (:state move) buttons) buttons))

   127 

   128 (defn play

   129   ([^SaveState state n]

   130      (reduce (fn [s _] (step s)) state (range n)))

   131   ([n]

   132      (play @current-state n)))

   133 

   134 (defn play-moves

   135   ([moves [prev state]]

   136      (set-state! state)

   137      (dorun (map (fn [move] (step @current-state move)) moves))

   138      [(concat prev moves) @current-state]))

   139   

   140 ;;;;;;;;;;;

   141 

   142 

   143 ;;;;;;;;;;;;;;; CPU data

   144 

   145 (defn cpu-data [size arr-fn]

   146   (let [store (int-array size)]

   147     (fn get-data

   148       ([] (get-data @current-state))

   149       ([state]

   150          (set-state! state) (arr-fn store) store))))

   151 

   152 (defn write-cpu-data [size store-fn]

   153   (fn [new-data]

   154     (let [store (int-array new-data)]

   155       (assert (= size (count new-data)))

   156       (store-fn store))))

   157 

   158 (def memory

   159   (cpu-data Gb/GB_MEMORY #(Gb/getMemory %)))

   160 

   161 (def ram

   162   (cpu-data Gb/RAM_SIZE #(Gb/getRAM %)))

   163 

   164 (def rom 

   165   (cpu-data Gb/ROM_SIZE #(Gb/getROM %)))

   166 

   167 (def working-ram 

   168   (cpu-data Gb/WRAM_SIZE #(Gb/getWRAM %)))

   169 

   170 (def video-ram 

   171   (cpu-data Gb/VRAM_SIZE #(Gb/getVRAM %)))

   172 

   173 (def registers

   174   (cpu-data Gb/NUM_REGISTERS #(Gb/getRegisters %)))

   175 

   176 (def write-memory!

   177   (write-cpu-data Gb/GB_MEMORY #(Gb/writeMemory %)))

   178 

   179 (def write-registers!

   180   (write-cpu-data Gb/NUM_REGISTERS #(Gb/writeRegisters %)))

   181 

   182 ;;;;;  Registers  ;;;;;;;;;;;;;;;;;;;;;;;;;;;

   183 

   184 (defmacro gen-get-set-register [name index]

   185   (let [name-bang (symbol (str name "!"))]

   186     `(do

   187        (defn ~name

   188          ~(str "Retrieve the " name " register from state, or "

   189                "from @current-state if state is absent.")

   190          ([state#]

   191             (nth (registers state#) ~index))

   192          ([]

   193             (~name @current-state)))

   194        (defn ~name-bang

   195          ~(str "Set the " name " register for state, or "

   196                "for @current-state if state is absent.")

   197          ([state# new-register#]

   198             (set-state! state#)

   199             (let [registers# (registers state#)]

   200               (aset registers# ~index new-register#)

   201               (Gb/writeRegisters registers#)

   202               (update-state)))

   203          ([new-register#]

   204             (~name-bang @current-state new-register#))))))

   205 

   206 ;; 16 bit registers

   207 (gen-get-set-register PC 0)

   208 (gen-get-set-register SP 1)

   209 (gen-get-set-register AF 2)

   210 (gen-get-set-register BC 3)

   211 (gen-get-set-register DE 4)

   212 (gen-get-set-register HL 5)

   213 (gen-get-set-register IFF 6)

   214 

   215 ;; 8 bit registers

   216 (gen-get-set-register DIV 7)

   217 (gen-get-set-register TIMA 8)

   218 (gen-get-set-register TMA 9)

   219 (gen-get-set-register IF 11)

   220 (gen-get-set-register LCDC 12)

   221 (gen-get-set-register STAT 13)

   222 (gen-get-set-register SCY 14)

   223 (gen-get-set-register SCX 15)

   224 (gen-get-set-register LY 16)

   225 (gen-get-set-register DMA 18)

   226 (gen-get-set-register WY 19)

   227 (gen-get-set-register WX 20)

   228 (gen-get-set-register VBK 21)

   229 (gen-get-set-register HDMA1 22)

   230 (gen-get-set-register HDMA2 23)

   231 (gen-get-set-register HDMA3 24)

   232 (gen-get-set-register HDMA4 25)

   233 (gen-get-set-register HDMA5 26)

   234 (gen-get-set-register SVBK 27)

   235 (gen-get-set-register IE 28)

   236                             

   237 ;;;;;;;;;;;;;;;

   238 

   239 (defmacro defn-memo

   240   [& forms]

   241   (let [fun-name (first forms)]

   242     `(do

   243        (defn ~@forms)

   244        (alter-var-root (var ~fun-name) memoize))))

   245
author	Robert McIntyre <rlm@mit.edu>
date	Mon, 12 Mar 2012 12:41:55 -0500
parents	2090bcb78f44
children	d2e00ea31508