Mercurial > vba-clojure

     1 (ns com.aurellem.gb.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 

     9 (defrecord SaveState [data])

    10 

    11 (def user-home (File. (System/getProperty "user.home")))

    12 

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

    14   (File. user-home "proj/vba-clojure/save-states/"))

    15 

    16 (def current-state (atom nil))

    17 

    18 (defn state-cache-file [name]

    19   (File. *save-state-cache* (str name ".sav")))

    20 

    21 (defn write-state!

    22   ([^SaveState name]

    23      (write-state! @current-state name))

    24   ([^SaveState save ^String name]

    25      (let [buffer (:data save)

    26            bytes (byte-array (.limit buffer))

    27            dest (state-cache-file name)]

    28        (.get buffer bytes)

    29        (FileUtils/writeByteArrayToFile dest bytes)

    30        (.rewind buffer)

    31        dest)))

    32 

    33 (defn read-state [name]

    34   (let [save (state-cache-file name)]

    35     (assert (.exists save))

    36     (let [buffer (Gb/saveBuffer)

    37           bytes (FileUtils/readFileToByteArray save)]

    38       (.put buffer bytes)

    39       (.flip buffer)

    40       (SaveState. buffer))))

    41 ;;;;;;;;;;;;;;;;

    42 

    43 

    44 ;; Gameboy management

    45 (Gb/loadVBA)

    46 

    47 (def yellow-rom-image

    48   (File. user-home "proj/pokemon-escape/roms/yellow.gbc"))

    49 

    50 (def yellow-save-file

    51   (File. user-home "proj/pokemon-escape/roms/yellow.sav"))

    52 

    53 (def on? (atom nil))

    54 

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

    56 

    57 (defn restart! []

    58   (shutdown!)

    59   (.delete yellow-save-file)

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

    61   (reset! on? true))

    62 

    63 ;;; The first state!

    64 (defn gen-root! []

    65   (restart!)

    66   (let [state (SaveState. (Gb/saveState))]

    67     (write-state! state "root" ) state))

    68 

    69 (defn root []

    70   (if (.exists (state-cache-file "root"))

    71     (read-state "root")

    72     (gen-root!)))

    73 

    74 ;;;; Press Buttons

    75 

    76 (def button-code

    77   {;; main buttons

    78    :a         0x0001

    79    :b         0x0002

    80 

    81    ;; directional pad

    82    :r         0x0010

    83    :l         0x0020

    84    :u         0x0040

    85    :d         0x0080

    86 

    87    ;; meta buttons

    88    :select    0x0004

    89    :start     0x0008

    90 

    91    ;; pseudo-buttons

    92    :restart   0x0800 ; hard reset 

    93    :listen -1        ; listen for user input

    94    })

    95 

    96 (defn button-mask [buttons]

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

    98 

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

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

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

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

   103     (do 

   104       (Gb/loadState (:data state))

   105       (reset! current-state state))))

   106 

   107 (defn update-state []

   108   (reset! current-state

   109           (SaveState. (Gb/saveState))))

   110 

   111 (defn step

   112   ([^SaveState state buttons]

   113      (set-state! state)

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

   115      (reset! current-state 

   116              (SaveState. (Gb/saveState))))

   117   ([^SaveState state]

   118      (step state [:listen]))

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

   120 

   121 (defn tick

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

   123   ([^SaveState state]

   124      (set-state! state)

   125      (Gb/tick)

   126      (update-state)))

   127 

   128 (defn play

   129   ([^SaveState state n]

   130      (try

   131        (set-state! state)

   132        (dorun (dotimes [_ n]

   133                 (Thread/sleep 1)

   134                 (Gb/step)))

   135        (finally

   136              (update-state))))

   137   ([n]

   138      (play @current-state n)))

   139 

   140 (defn continue!

   141   ([state]

   142      (play state Integer/MAX_VALUE))

   143   ([]

   144     (continue! @current-state)))

   145 

   146 (defn run-moves [state moves]

   147   (set-state! state)

   148   (dorun (map #(Gb/step (button-mask %))

   149               moves))

   150   (update-state))

   151 

   152 (defn play-moves

   153   ([moves [prev state]]

   154      (set-state! state)

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

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

   157   

   158 ;;;;;;;;;;;

   159 

   160 ;; Get Screen Pixels, Save Screenshot

   161 

   162 (defn write-png!

   163   ([^SaveState state ^File target]

   164      (set-state! state)

   165      (Gb/nwritePNG (.getCanonicalPath target)))

   166   ([^File target]

   167      (write-png! @current-state target)))

   168 

   169 

   170 

   171 

   172 ;;;;;;;;;;;;;;; CPU data

   173 

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

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

   176     (fn get-data

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

   178       ([state]

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

   180 

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

   182   (fn store-data

   183     ([state new-data]

   184        (set-state! state)

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

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

   187          (store-fn store)

   188          (update-state)))

   189     ([new-data]

   190        (store-data @current-state new-data))))

   191 

   192 (def memory

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

   194 

   195 (def ram

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

   197 

   198 (def rom 

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

   200 

   201 (def working-ram 

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

   203 

   204 (def video-ram 

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

   206 

   207 (def registers

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

   209 

   210 (def pixels

   211   (cpu-data (* Gb/DISPLAY_WIDTH Gb/DISPLAY_HEIGHT)

   212             #(Gb/getPixels %)))

   213 

   214 (def write-memory!

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

   216 

   217 (def write-registers!

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

   219 

   220 (def write-rom!

   221   (write-cpu-data Gb/ROM_SIZE #(Gb/writeROM %)))

   222 

   223 ;;;;;  Registers  ;;;;;;;;;;;;;;;;;;;;;;;;;;;

   224 

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

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

   227     `(do

   228        (defn ~name

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

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

   231          ([state#]

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

   233          ([]

   234             (~name @current-state)))

   235        (defn ~name-bang

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

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

   238          ([state# new-register#]

   239             (set-state! state#)

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

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

   242               (Gb/writeRegisters registers#)

   243               (update-state)))

   244          ([new-register#]

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

   246 

   247 ;; 16 bit registers

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

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

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

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

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

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

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

   255 

   256 ;; 8 bit registers

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

   277 

   278 ;;;;;;;;;;;;;;;

   279 

   280 (defmacro defn-memo

   281   [& forms]

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

   283     `(do

   284        (defn ~@forms)

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

   286 

   287 (def original-rom (rom (root)))

   288 

   289 

   290 ;; RGB colors in an image are not the same as those in a GameBoy, so I

   291 ;; need to convert them.  Fortunately, this code is already written

   292 ;; for me in this C-code from the public domain hi-color converter by

   293 ;; Glen Cook, Jeff Frohwein, and Rob Jones.

   294 (defn rgb->gb-rb [[r g b :as color]]

   295   (let [store (int-array 3)]

   296     (Gb/translateRGB (int-array color) store)

   297     (vec store)))

   298 

   299
author	Robert McIntyre <rlm@mit.edu>
date	Wed, 20 Jun 2012 19:51:50 -0500
parents	a6d060a64246
children	5596cd4a3fc6