1# Copyright (c) 2013-2016 Jeffrey Pfau
  2#
  3# This Source Code Form is subject to the terms of the Mozilla Public
  4# License, v. 2.0. If a copy of the MPL was not distributed with this
  5# file, You can obtain one at http://mozilla.org/MPL/2.0/.
  6from ._pylib import ffi, lib
  7from .arm import ARMCore
  8from .core import Core, needsReset
  9from .tile import Sprite
 10from .memory import Memory
 11from . import createCallback
 12
 13class GBA(Core):
 14    KEY_A = lib.GBA_KEY_A
 15    KEY_B = lib.GBA_KEY_B
 16    KEY_SELECT = lib.GBA_KEY_SELECT
 17    KEY_START = lib.GBA_KEY_START
 18    KEY_DOWN = lib.GBA_KEY_DOWN
 19    KEY_UP = lib.GBA_KEY_UP
 20    KEY_LEFT = lib.GBA_KEY_LEFT
 21    KEY_RIGHT = lib.GBA_KEY_RIGHT
 22    KEY_L = lib.GBA_KEY_L
 23    KEY_R = lib.GBA_KEY_R
 24
 25    SIO_NORMAL_8 = lib.SIO_NORMAL_8
 26    SIO_NORMAL_32 = lib.SIO_NORMAL_32
 27    SIO_MULTI = lib.SIO_MULTI
 28    SIO_UART = lib.SIO_UART
 29    SIO_GPIO = lib.SIO_GPIO
 30
 31    def __init__(self, native):
 32        super(GBA, self).__init__(native)
 33        self._native = ffi.cast("struct GBA*", native.board)
 34        self.sprites = GBAObjs(self)
 35        self.cpu = ARMCore(self._core.cpu)
 36
 37    @needsReset
 38    def _initCache(self, cache):
 39        lib.GBAVideoCacheInit(cache)
 40        lib.GBAVideoCacheAssociate(cache, ffi.addressof(self._native.video))
 41
 42    def _deinitCache(self, cache):
 43        self._native.video.renderer.cache = ffi.NULL
 44        lib.mCacheSetDeinit(cache)
 45
 46    def reset(self):
 47        super(GBA, self).reset()
 48        self.memory = GBAMemory(self._core, self._native.memory.romSize)
 49
 50    def attachSIO(self, link, mode=lib.SIO_MULTI):
 51        lib.GBASIOSetDriver(ffi.addressof(self._native.sio), link._native, mode)
 52
 53createCallback("GBASIOPythonDriver", "init")
 54createCallback("GBASIOPythonDriver", "deinit")
 55createCallback("GBASIOPythonDriver", "load")
 56createCallback("GBASIOPythonDriver", "unload")
 57createCallback("GBASIOPythonDriver", "writeRegister")
 58
 59class GBASIODriver(object):
 60    def __init__(self):
 61        self._handle = ffi.new_handle(self)
 62        self._native = ffi.gc(lib.GBASIOPythonDriverCreate(self._handle), lib.free)
 63
 64    def init(self):
 65        return True
 66
 67    def deinit(self):
 68        pass
 69
 70    def load(self):
 71        return True
 72
 73    def unload(self):
 74        return True
 75
 76    def writeRegister(self, address, value):
 77        return value
 78
 79class GBAMemory(Memory):
 80    def __init__(self, core, romSize=lib.SIZE_CART0):
 81        super(GBAMemory, self).__init__(core, 0x100000000)
 82
 83        self.bios = Memory(core, lib.SIZE_BIOS, lib.BASE_BIOS)
 84        self.wram = Memory(core, lib.SIZE_WORKING_RAM, lib.BASE_WORKING_RAM)
 85        self.iwram = Memory(core, lib.SIZE_WORKING_IRAM, lib.BASE_WORKING_IRAM)
 86        self.io = Memory(core, lib.SIZE_IO, lib.BASE_IO)
 87        self.palette = Memory(core, lib.SIZE_PALETTE_RAM, lib.BASE_PALETTE_RAM)
 88        self.vram = Memory(core, lib.SIZE_VRAM, lib.BASE_VRAM)
 89        self.oam = Memory(core, lib.SIZE_OAM, lib.BASE_OAM)
 90        self.cart0 = Memory(core, romSize, lib.BASE_CART0)
 91        self.cart1 = Memory(core, romSize, lib.BASE_CART1)
 92        self.cart2 = Memory(core, romSize, lib.BASE_CART2)
 93        self.cart = self.cart0
 94        self.rom = self.cart0
 95        self.sram = Memory(core, lib.SIZE_CART_SRAM, lib.BASE_CART_SRAM)
 96
 97class GBASprite(Sprite):
 98    TILE_BASE = 0x800, 0x400
 99    PALETTE_BASE = 0x10, 1
100
101    def __init__(self, obj):
102        self._a = obj.a
103        self._b = obj.b
104        self._c = obj.c
105        self.x = self._b & 0x1FF
106        self.y = self._a & 0xFF
107        self._shape = self._a >> 14
108        self._size = self._b >> 14
109        self._256Color = bool(self._a & 0x2000)
110        self.width, self.height = lib.GBAVideoObjSizes[self._shape * 4 + self._size]
111        self.tile = self._c & 0x3FF
112        if self._256Color:
113            self.paletteId = 0
114            self.tile >>= 1
115        else:
116            self.paletteId = self._c >> 12
117
118class GBAObjs:
119    def __init__(self, core):
120        self._core = core
121        self._obj = core._native.video.oam.obj
122
123    def __len__(self):
124        return 128
125
126    def __getitem__(self, index):
127        if index >= len(self):
128            raise IndexError()
129        sprite = GBASprite(self._obj[index])
130        tiles = self._core.tiles[3 if sprite._256Color else 2]
131        map1D = bool(self._core._native.memory.io[0] & 0x40)
132        sprite.constitute(tiles, 0 if map1D else 0x20)
133        return sprite