Organize the engine/ directory

This is an informed attempt at reorganizing the engine/ directory by
creating categorized subdirectories, in order to make it easier to
navigate and find things.

The directories created are as follows:
* engine/game: Contains all "minigames", things like the unown puzzle
and slot machine.
* engine/gfx: Contains all handling of graphics. From loading palettes
to playing animations.
* engine/link: Contains all multiplayer functionality.
* engine/menu: Contains all generic/misc. menus and menu code.
Other, more specialized menus are in their own subdirectories (pokedex,
pokegear, party menu, etc).
* engine/overworld: Contains all handling of the overworld. From loading
and connecting maps to wild encounters and the scripting engine.
* engine/pokegear: In the same vein as engine/pokedex, except it could
use some more splitting up.
* engine/pokemon: Contains everything related to manipulating pokemon
data. From the pokemon storage system to evolution and mail.
* engine/printer: Contains everything related to printing things as well
as the printer communication.
* engine/title: Contains intro sequences, title screens and credits.

engine/gfx/player_gfx.asm

@@ -0,0 +1,224 @@
+Unreferenced_Function88248: ; 88248
+	ld c, CAL
+	ld a, [wPlayerGender]
+	bit PLAYERGENDER_FEMALE_F, a
+	jr z, .okay
+	ld c, KAREN
+
+.okay
+	ld a, c
+	ld [wTrainerClass], a
+	ret
+
+MovePlayerPicRight: ; 88258
+	hlcoord 6, 4
+	ld de, 1
+	jr MovePlayerPic
+
+MovePlayerPicLeft: ; 88260
+	hlcoord 13, 4
+	ld de, -1
+	; fallthrough
+
+MovePlayerPic: ; 88266
+; Move player pic at hl by de * 7 tiles.
+	ld c, $8
+.loop
+	push bc
+	push hl
+	push de
+	xor a
+	ld [hBGMapMode], a
+	lb bc, 7, 7
+	predef PlaceGraphic
+	xor a
+	ld [hBGMapThird], a
+	call WaitBGMap
+	call DelayFrame
+	pop de
+	pop hl
+	add hl, de
+	pop bc
+	dec c
+	ret z
+	push hl
+	push bc
+	ld a, l
+	sub e
+	ld l, a
+	ld a, h
+	sbc d
+	ld h, a
+	lb bc, 7, 7
+	call ClearBox
+	pop bc
+	pop hl
+	jr .loop
+
+ShowPlayerNamingChoices: ; 88297
+	ld hl, ChrisNameMenuHeader
+	ld a, [wPlayerGender]
+	bit PLAYERGENDER_FEMALE_F, a
+	jr z, .GotGender
+	ld hl, KrisNameMenuHeader
+.GotGender:
+	call LoadMenuHeader
+	call VerticalMenu
+	ld a, [wMenuCursorY]
+	dec a
+	call CopyNameFromMenu
+	call CloseWindow
+	ret
+
+INCLUDE "data/player_names.asm"
+
+GetPlayerNameArray: ; 88318 This Function is never called
+	ld hl, wPlayerName
+	ld de, MalePlayerNameArray
+	ld a, [wPlayerGender]
+	bit PLAYERGENDER_FEMALE_F, a
+	jr z, .done
+	ld de, FemalePlayerNameArray
+
+.done
+	call InitName
+	ret
+
+GetPlayerIcon: ; 8832c
+; Get the player icon corresponding to gender
+
+; Male
+	ld de, ChrisSpriteGFX
+	ld b, BANK(ChrisSpriteGFX)
+
+	ld a, [wPlayerGender]
+	bit PLAYERGENDER_FEMALE_F, a
+	jr z, .done
+
+; Female
+	ld de, KrisSpriteGFX
+	ld b, BANK(KrisSpriteGFX)
+
+.done
+	ret
+
+GetCardPic: ; 8833e
+	ld hl, ChrisCardPic
+	ld a, [wPlayerGender]
+	bit PLAYERGENDER_FEMALE_F, a
+	jr z, .GotClass
+	ld hl, KrisCardPic
+.GotClass:
+	ld de, vTiles2 tile $00
+	ld bc, $23 tiles
+	ld a, BANK(ChrisCardPic) ; BANK(KrisCardPic)
+	call FarCopyBytes
+	ld hl, CardGFX
+	ld de, vTiles2 tile $23
+	ld bc, 6 tiles
+	ld a, BANK(CardGFX)
+	call FarCopyBytes
+	ret
+
+ChrisCardPic: ; 88365
+INCBIN "gfx/trainer_card/chris_card.2bpp"
+
+KrisCardPic: ; 88595
+INCBIN "gfx/trainer_card/kris_card.2bpp"
+
+CardGFX: ; 887c5
+INCBIN "gfx/trainer_card/trainer_card.2bpp"
+
+GetPlayerBackpic: ; 88825
+	ld a, [wPlayerGender]
+	bit PLAYERGENDER_FEMALE_F, a
+	jr z, GetChrisBackpic
+	call GetKrisBackpic
+	ret
+
+GetChrisBackpic: ; 88830
+	ld hl, ChrisBackpic
+	ld b, BANK(ChrisBackpic)
+	ld de, vTiles2 tile $31
+	ld c, 7 * 7
+	predef DecompressGet2bpp
+	ret
+
+HOF_LoadTrainerFrontpic: ; 88840
+	call WaitBGMap
+	xor a
+	ld [hBGMapMode], a
+	ld e, 0
+	ld a, [wPlayerGender]
+	bit PLAYERGENDER_FEMALE_F, a
+	jr z, .GotClass
+	ld e, 1
+
+.GotClass:
+	ld a, e
+	ld [wTrainerClass], a
+	ld de, ChrisPic
+	ld a, [wPlayerGender]
+	bit PLAYERGENDER_FEMALE_F, a
+	jr z, .GotPic
+	ld de, KrisPic
+
+.GotPic:
+	ld hl, vTiles2
+	ld b, BANK(ChrisPic) ; BANK(KrisPic)
+	ld c, 7 * 7
+	call Get2bpp
+	call WaitBGMap
+	ld a, $1
+	ld [hBGMapMode], a
+	ret
+
+DrawIntroPlayerPic: ; 88874
+; Draw the player pic at (6,4).
+
+; Get class
+	ld e, CHRIS
+	ld a, [wPlayerGender]
+	bit PLAYERGENDER_FEMALE_F, a
+	jr z, .GotClass
+	ld e, KRIS
+.GotClass:
+	ld a, e
+	ld [wTrainerClass], a
+
+; Load pic
+	ld de, ChrisPic
+	ld a, [wPlayerGender]
+	bit PLAYERGENDER_FEMALE_F, a
+	jr z, .GotPic
+	ld de, KrisPic
+.GotPic:
+	ld hl, vTiles2
+	ld b, BANK(ChrisPic) ; BANK(KrisPic)
+	ld c, 7 * 7 ; dimensions
+	call Get2bpp
+
+; Draw
+	xor a
+	ld [hGraphicStartTile], a
+	hlcoord 6, 4
+	lb bc, 7, 7
+	predef PlaceGraphic
+	ret
+
+ChrisPic: ; 888a9
+INCBIN "gfx/player/chris.2bpp"
+
+KrisPic: ; 88bb9
+INCBIN "gfx/player/kris.2bpp"
+
+GetKrisBackpic: ; 88ec9
+; Kris's backpic is uncompressed.
+	ld de, KrisBackpic
+	ld hl, vTiles2 tile $31
+	lb bc, BANK(KrisBackpic), 7 * 7 ; dimensions
+	call Get2bpp
+	ret
+
+KrisBackpic: ; 88ed6
+INCBIN "gfx/player/kris_back.2bpp"