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annotate clojure/com/aurellem/gb/gb_driver.clj @ 498:554883a95de0

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discovered gameboy->vga color map.
author Robert McIntyre <rlm@mit.edu>
date Mon, 11 Jun 2012 10:07:01 -0500
parents a6d060a64246
children 5596cd4a3fc6
rev   line source
rlm@145 1 (ns com.aurellem.gb.gb-driver
rlm@145 2 (:import com.aurellem.gb.Gb)
rlm@145 3 (:import java.io.File)
rlm@145 4 (:import org.apache.commons.io.FileUtils)
rlm@145 5 (:import (java.nio IntBuffer ByteOrder)))
rlm@145 6
rlm@145 7 ;; Savestates
ocsenave@227 8
rlm@145 9 (defrecord SaveState [data])
rlm@145 10
rlm@145 11 (def user-home (File. (System/getProperty "user.home")))
rlm@145 12
rlm@145 13 (def ^:dynamic *save-state-cache*
rlm@145 14 (File. user-home "proj/vba-clojure/save-states/"))
rlm@145 15
rlm@145 16 (def current-state (atom nil))
rlm@145 17
rlm@145 18 (defn state-cache-file [name]
rlm@145 19 (File. *save-state-cache* (str name ".sav")))
rlm@145 20
rlm@145 21 (defn write-state!
rlm@145 22 ([^SaveState name]
rlm@145 23 (write-state! @current-state name))
rlm@145 24 ([^SaveState save ^String name]
rlm@145 25 (let [buffer (:data save)
rlm@145 26 bytes (byte-array (.limit buffer))
rlm@145 27 dest (state-cache-file name)]
rlm@145 28 (.get buffer bytes)
rlm@145 29 (FileUtils/writeByteArrayToFile dest bytes)
rlm@145 30 (.rewind buffer)
rlm@145 31 dest)))
rlm@145 32
rlm@145 33 (defn read-state [name]
rlm@145 34 (let [save (state-cache-file name)]
rlm@154 35 (assert (.exists save))
rlm@154 36 (let [buffer (Gb/saveBuffer)
rlm@154 37 bytes (FileUtils/readFileToByteArray save)]
rlm@154 38 (.put buffer bytes)
rlm@154 39 (.flip buffer)
rlm@154 40 (SaveState. buffer))))
rlm@145 41 ;;;;;;;;;;;;;;;;
rlm@145 42
rlm@496 43
rlm@145 44 ;; Gameboy management
rlm@145 45 (Gb/loadVBA)
rlm@145 46
rlm@145 47 (def yellow-rom-image
rlm@145 48 (File. user-home "proj/pokemon-escape/roms/yellow.gbc"))
rlm@145 49
rlm@145 50 (def yellow-save-file
rlm@145 51 (File. user-home "proj/pokemon-escape/roms/yellow.sav"))
rlm@145 52
rlm@145 53 (def on? (atom nil))
rlm@145 54
rlm@145 55 (defn shutdown! [] (Gb/shutdown) (reset! on? false))
rlm@145 56
rlm@145 57 (defn restart! []
rlm@145 58 (shutdown!)
rlm@145 59 (.delete yellow-save-file)
rlm@145 60 (Gb/startEmulator (.getCanonicalPath yellow-rom-image))
rlm@145 61 (reset! on? true))
rlm@145 62
rlm@145 63 ;;; The first state!
rlm@145 64 (defn gen-root! []
rlm@145 65 (restart!)
rlm@145 66 (let [state (SaveState. (Gb/saveState))]
rlm@145 67 (write-state! state "root" ) state))
rlm@145 68
rlm@145 69 (defn root []
rlm@145 70 (if (.exists (state-cache-file "root"))
rlm@145 71 (read-state "root")
rlm@145 72 (gen-root!)))
rlm@145 73
rlm@145 74 ;;;; Press Buttons
rlm@145 75
rlm@145 76 (def button-code
rlm@145 77 {;; main buttons
rlm@145 78 :a 0x0001
rlm@145 79 :b 0x0002
rlm@145 80
rlm@145 81 ;; directional pad
rlm@145 82 :r 0x0010
rlm@145 83 :l 0x0020
rlm@145 84 :u 0x0040
rlm@145 85 :d 0x0080
rlm@145 86
rlm@145 87 ;; meta buttons
rlm@145 88 :select 0x0004
rlm@145 89 :start 0x0008
rlm@145 90
rlm@145 91 ;; pseudo-buttons
rlm@145 92 :restart 0x0800 ; hard reset
rlm@145 93 :listen -1 ; listen for user input
rlm@145 94 })
rlm@145 95
rlm@145 96 (defn button-mask [buttons]
rlm@145 97 (reduce bit-or 0x0000 (map button-code buttons)))
rlm@145 98
rlm@145 99 (defn set-state! [^SaveState state]
rlm@145 100 (assert (:data state) "Not a valid state!")
rlm@145 101 (if (not @on?) (restart!))
rlm@145 102 (if (not= state @current-state)
rlm@145 103 (do
rlm@145 104 (Gb/loadState (:data state))
rlm@145 105 (reset! current-state state))))
rlm@145 106
rlm@145 107 (defn update-state []
rlm@145 108 (reset! current-state
rlm@145 109 (SaveState. (Gb/saveState))))
rlm@145 110
rlm@145 111 (defn step
rlm@145 112 ([^SaveState state buttons]
rlm@145 113 (set-state! state)
rlm@145 114 (Gb/step (button-mask buttons))
rlm@145 115 (reset! current-state
rlm@145 116 (SaveState. (Gb/saveState))))
rlm@145 117 ([^SaveState state]
rlm@145 118 (step state [:listen]))
rlm@145 119 ([] (step (if @current-state @current-state (root)))))
rlm@145 120
rlm@145 121 (defn tick
rlm@145 122 ([] (tick @current-state))
rlm@145 123 ([^SaveState state]
rlm@145 124 (set-state! state)
rlm@145 125 (Gb/tick)
rlm@145 126 (update-state)))
rlm@145 127
rlm@145 128 (defn play
rlm@145 129 ([^SaveState state n]
rlm@145 130 (try
rlm@145 131 (set-state! state)
rlm@145 132 (dorun (dotimes [_ n]
rlm@145 133 (Thread/sleep 1)
rlm@145 134 (Gb/step)))
rlm@145 135 (finally
rlm@145 136 (update-state))))
rlm@145 137 ([n]
rlm@145 138 (play @current-state n)))
rlm@145 139
rlm@145 140 (defn continue!
rlm@145 141 ([state]
rlm@145 142 (play state Integer/MAX_VALUE))
rlm@145 143 ([]
rlm@145 144 (continue! @current-state)))
rlm@145 145
rlm@326 146 (defn run-moves [state moves]
rlm@154 147 (set-state! state)
rlm@154 148 (dorun (map #(Gb/step (button-mask %))
rlm@154 149 moves))
rlm@154 150 (update-state))
rlm@154 151
rlm@145 152 (defn play-moves
rlm@145 153 ([moves [prev state]]
rlm@145 154 (set-state! state)
rlm@145 155 (dorun (map (fn [move] (step @current-state move)) moves))
rlm@145 156 [(concat prev moves) @current-state]))
rlm@145 157
rlm@145 158 ;;;;;;;;;;;
rlm@145 159
rlm@496 160 ;; Get Screen Pixels, Save Screenshot
rlm@496 161
rlm@496 162 (defn write-png!
rlm@496 163 ([^SaveState state ^File target]
rlm@496 164 (set-state! state)
rlm@496 165 (Gb/nwritePNG (.getCanonicalPath target)))
rlm@496 166 ([^File target]
rlm@496 167 (write-png! @current-state target)))
rlm@496 168
rlm@496 169
rlm@496 170
rlm@145 171
rlm@145 172 ;;;;;;;;;;;;;;; CPU data
rlm@145 173
rlm@145 174 (defn cpu-data [size arr-fn]
rlm@145 175 (let [store (int-array size)]
rlm@145 176 (fn get-data
rlm@145 177 ([] (get-data @current-state))
rlm@145 178 ([state]
rlm@145 179 (set-state! state) (arr-fn store) store))))
rlm@145 180
rlm@145 181 (defn write-cpu-data [size store-fn]
rlm@145 182 (fn store-data
rlm@145 183 ([state new-data]
rlm@145 184 (set-state! state)
rlm@145 185 (let [store (int-array new-data)]
rlm@145 186 (assert (= size (count new-data)))
rlm@145 187 (store-fn store)
rlm@145 188 (update-state)))
rlm@145 189 ([new-data]
rlm@145 190 (store-data @current-state new-data))))
rlm@145 191
rlm@145 192 (def memory
rlm@145 193 (cpu-data Gb/GB_MEMORY #(Gb/getMemory %)))
rlm@145 194
rlm@145 195 (def ram
rlm@145 196 (cpu-data Gb/RAM_SIZE #(Gb/getRAM %)))
rlm@145 197
rlm@145 198 (def rom
rlm@145 199 (cpu-data Gb/ROM_SIZE #(Gb/getROM %)))
rlm@145 200
rlm@145 201 (def working-ram
rlm@145 202 (cpu-data Gb/WRAM_SIZE #(Gb/getWRAM %)))
rlm@145 203
rlm@145 204 (def video-ram
rlm@145 205 (cpu-data Gb/VRAM_SIZE #(Gb/getVRAM %)))
rlm@145 206
rlm@145 207 (def registers
rlm@145 208 (cpu-data Gb/NUM_REGISTERS #(Gb/getRegisters %)))
rlm@145 209
rlm@496 210 (def pixels
rlm@496 211 (cpu-data (* Gb/DISPLAY_WIDTH Gb/DISPLAY_HEIGHT)
rlm@496 212 #(Gb/getPixels %)))
rlm@496 213
rlm@145 214 (def write-memory!
rlm@145 215 (write-cpu-data Gb/GB_MEMORY #(Gb/writeMemory %)))
rlm@145 216
rlm@145 217 (def write-registers!
rlm@145 218 (write-cpu-data Gb/NUM_REGISTERS #(Gb/writeRegisters %)))
rlm@145 219
rlm@191 220 (def write-rom!
rlm@191 221 (write-cpu-data Gb/ROM_SIZE #(Gb/writeROM %)))
rlm@191 222
rlm@145 223 ;;;;; Registers ;;;;;;;;;;;;;;;;;;;;;;;;;;;
rlm@145 224
rlm@145 225 (defmacro gen-get-set-register [name index]
rlm@145 226 (let [name-bang (symbol (str name "!"))]
rlm@145 227 `(do
rlm@145 228 (defn ~name
rlm@145 229 ~(str "Retrieve the " name " register from state, or "
rlm@145 230 "from @current-state if state is absent.")
rlm@145 231 ([state#]
rlm@145 232 (nth (registers state#) ~index))
rlm@145 233 ([]
rlm@145 234 (~name @current-state)))
rlm@145 235 (defn ~name-bang
rlm@145 236 ~(str "Set the " name " register for state, or "
rlm@145 237 "for @current-state if state is absent.")
rlm@145 238 ([state# new-register#]
rlm@145 239 (set-state! state#)
rlm@145 240 (let [registers# (registers state#)]
rlm@145 241 (aset registers# ~index new-register#)
rlm@145 242 (Gb/writeRegisters registers#)
rlm@145 243 (update-state)))
rlm@145 244 ([new-register#]
rlm@145 245 (~name-bang @current-state new-register#))))))
rlm@145 246
rlm@145 247 ;; 16 bit registers
rlm@145 248 (gen-get-set-register PC 0)
rlm@145 249 (gen-get-set-register SP 1)
rlm@145 250 (gen-get-set-register AF 2)
rlm@145 251 (gen-get-set-register BC 3)
rlm@145 252 (gen-get-set-register DE 4)
rlm@145 253 (gen-get-set-register HL 5)
rlm@145 254 (gen-get-set-register IFF 6)
rlm@145 255
rlm@145 256 ;; 8 bit registers
rlm@145 257 (gen-get-set-register DIV 7)
rlm@145 258 (gen-get-set-register TIMA 8)
rlm@145 259 (gen-get-set-register TMA 9)
rlm@145 260 (gen-get-set-register IF 11)
rlm@145 261 (gen-get-set-register LCDC 12)
rlm@145 262 (gen-get-set-register STAT 13)
rlm@145 263 (gen-get-set-register SCY 14)
rlm@145 264 (gen-get-set-register SCX 15)
rlm@145 265 (gen-get-set-register LY 16)
rlm@145 266 (gen-get-set-register DMA 18)
rlm@145 267 (gen-get-set-register WY 19)
rlm@145 268 (gen-get-set-register WX 20)
rlm@145 269 (gen-get-set-register VBK 21)
rlm@145 270 (gen-get-set-register HDMA1 22)
rlm@145 271 (gen-get-set-register HDMA2 23)
rlm@145 272 (gen-get-set-register HDMA3 24)
rlm@145 273 (gen-get-set-register HDMA4 25)
rlm@145 274 (gen-get-set-register HDMA5 26)
rlm@145 275 (gen-get-set-register SVBK 27)
rlm@145 276 (gen-get-set-register IE 28)
rlm@145 277
rlm@145 278 ;;;;;;;;;;;;;;;
rlm@145 279
rlm@145 280 (defmacro defn-memo
rlm@145 281 [& forms]
rlm@145 282 (let [fun-name (first forms)]
rlm@145 283 `(do
rlm@145 284 (defn ~@forms)
rlm@145 285 (alter-var-root (var ~fun-name) memoize))))
rlm@145 286
rlm@488 287 (def original-rom (rom (root)))
ocsenave@227 288
rlm@489 289
rlm@489 290 ;; RGB colors in an image are not the same as those in a GameBoy, so I
rlm@489 291 ;; need to convert them. Fortunately, this code is already written
rlm@489 292 ;; for me in this C-code from the public domain hi-color converter by
rlm@489 293 ;; Glen Cook, Jeff Frohwein, and Rob Jones.
rlm@488 294 (defn rgb->gb-rb [[r g b :as color]]
rlm@488 295 (let [store (int-array 3)]
rlm@488 296 (Gb/translateRGB (int-array color) store)
rlm@496 297 (vec store)))
rlm@496 298
rlm@496 299