rlm@60: (ns com.aurellem.gb-driver
rlm@60:   (:import com.aurellem.gb.Gb)
rlm@65:   (:import java.io.File)
rlm@60:   (:import (java.nio IntBuffer ByteOrder)))
rlm@48: 
rlm@66: (Gb/loadVBA)
rlm@65: 
rlm@65: (def yellow-rom-image
rlm@65:   (File. "/home/r/proj/pokemon-escape/roms/yellow.gbc"))
rlm@65: 
rlm@67: (def yellow-save-file
rlm@67:   (File. "/home/r/proj/pokemon-escape/roms/yellow.sav"))
rlm@67: 
rlm@73: (def current-frame (atom 0))
rlm@73: 
rlm@62: (defn vba-init []
rlm@73:   (reset! current-frame 0)
rlm@67:   (.delete yellow-save-file)
rlm@70:   (Gb/startEmulator (.getCanonicalPath yellow-rom-image)))
rlm@60: 
rlm@71: (defn shutdown [] (Gb/shutdown))
rlm@71: 
rlm@71: (defn reset [] (shutdown) (vba-init))
rlm@71: 
rlm@64: (defn cpu-data [size arr-fn]
rlm@64:   (let [store (int-array size)]
rlm@64:     (fn [] 
rlm@64:       (arr-fn store)
rlm@64:       store)))
rlm@60: 
rlm@64: (def ram
rlm@64:   (cpu-data (Gb/getRAMSize) #(Gb/getRAM %)))
rlm@61: 
rlm@64: (def rom 
rlm@64:   (cpu-data (Gb/getROMSize) #(Gb/getROM %)))
rlm@61: 
rlm@64: (def working-ram 
rlm@64:   (cpu-data Gb/WRAM_SIZE #(Gb/getWRAM %)))
rlm@62: 
rlm@64: (def video-ram 
rlm@64:   (cpu-data Gb/VRAM_SIZE #(Gb/getVRAM %)))
rlm@64: 
rlm@64: (def registers
rlm@64:   (cpu-data Gb/NUM_REGISTERS #(Gb/getRegisters %)))
rlm@64: 
rlm@71: (def button-code
rlm@71:   {;; main buttons
rlm@71:    :a         0x0001
rlm@71:    :b         0x0002
rlm@71: 
rlm@71:    ;; directional pad
rlm@71:    :r         0x0010
rlm@71:    :l         0x0020
rlm@71:    :u         0x0040
rlm@71:    :d         0x0080
rlm@71: 
rlm@71:    ;; meta buttons
rlm@71:    :select    0x0004
rlm@71:    :start     0x0008
rlm@71: 
rlm@71:    ;; hard reset -- not really a button
rlm@71:    :reset   0x0800})
rlm@71: 
rlm@71: (defn button-mask [buttons]
rlm@71:   (reduce bit-or 0x0000 (map button-code buttons)))
rlm@71: 
rlm@71: (defn buttons [mask]
rlm@71:   (loop [buttons []
rlm@71:          masks (seq button-code)]
rlm@71:     (if (empty? masks) buttons
rlm@71:         (let [[button value] (first masks)]
rlm@71:           (if (not= 0x0000 (bit-and value mask))
rlm@71:             (recur (conj buttons button) (rest masks))
rlm@71:             (recur buttons (rest masks)))))))
rlm@71: 
rlm@73: 
rlm@73: (defn save-state [] (Gb/saveState))
rlm@73: 
rlm@73: (def history (atom {}))
rlm@73: 
rlm@73: (defn goto [frame]
rlm@73:   (let [save (@history frame)]
rlm@73:     (if (not (nil? save))
rlm@73:       (do
rlm@73:         (reset! current-frame frame)
rlm@73:         (Gb/loadState save))
rlm@73:       (println "no backup state"))))
rlm@73: 
rlm@73: (defn clear-history [] (reset! history {}))
rlm@73: 
rlm@74: (defn rewind
rlm@74:   ([n] (goto (- @current-frame n)))
rlm@74:   ([] (rewind 1)))
rlm@73:   
rlm@73: (defn backup-state [frame]
rlm@73:   (swap! history #(assoc % frame (save-state))))
rlm@73: 
rlm@73: (def ^:dynamic *save-history* true)
rlm@73: 
rlm@73: (defn advance []
rlm@75:   (swap! current-frame inc)
rlm@75:   (if *save-history*
rlm@75:     (let [save (save-state)]
rlm@75:       (backup-state @current-frame))))
rlm@73: 
rlm@65: (defn step
rlm@73:   ([] (advance) (Gb/step))
rlm@71:   ([mask-or-buttons]
rlm@73:      (advance)
rlm@71:      (if (number? mask-or-buttons)
rlm@71:        (Gb/step mask-or-buttons)
rlm@71:        (Gb/step (button-mask mask-or-buttons)))))
rlm@73: 
rlm@75: (defn step! [& args]
rlm@75:   (binding [*save-history* false]
rlm@75:     (apply step args)))
rlm@75: 
rlm@73: (defn frame [] @current-frame)
rlm@73:   
rlm@73: