mirror of
https://github.com/lscharen/iigs-game-engine.git
synced 2024-06-12 13:29:30 +00:00
886 lines
30 KiB
ArmAsm
886 lines
30 KiB
ArmAsm
; Test driver to exercise graphics routines.
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;
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; The general organization of the code is
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;
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; 1. The blitter/ folder contains all of the low-level graphics primitives
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; 2. The blitter/DirectPage.s file defines all of the DP locations
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; 3. Subroutines are written to try and be stateless, but, if local
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; storage is needed, it is takes from the stack and uses stack-relative
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; addressing.
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; Allow dynamic resizing to benchmark against different games
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REL
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DSK MAINSEG
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use Util.Macs.s
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use Locator.Macs.s
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use Mem.Macs.s
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use Misc.Macs.s
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put ..\macros\App.Macs.s
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put ..\macros\EDS.GSOS.MACS.s
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put .\blitter\DirectPage.s
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mx %00
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SHADOW_REG equ $E0C035
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STATE_REG equ $E0C068
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NEW_VIDEO_REG equ $E0C029
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BORDER_REG equ $E0C034 ; 0-3 = border, 4-7 Text color
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VBL_VERT_REG equ $E0C02E
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VBL_HORZ_REG equ $E0C02F
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KBD_REG equ $E0C000
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KBD_STROBE_REG equ $E0C010
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VBL_STATE_REG equ $E0C019
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SHADOW_SCREEN equ $012000
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SHR_SCREEN equ $E12000
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SHR_SCB equ $E19D00
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SHR_PALETTES equ $E19E00
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; External references
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tiledata ext
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; Feature flags
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NO_INTERRUPTS equ 0 ; turn off for crossrunner debugging
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; Typical init
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phk
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plb
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; Tool startup
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_TLStartUp ; normal tool initialization
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pha
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_MMStartUp
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_Err ; should never happen
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pla
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sta MasterId ; our master handle references the memory allocated to us
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ora #$0100 ; set auxID = $01 (valid values $01-0f)
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sta UserId ; any memory we request must use our own id
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_MTStartUp
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; Install interrupt handlers. We use the VBL interrupt to keep animations
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; moving at a consistent rate, regarless of the rendered frame rate. The
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; one-second timer is generally just used for counters and as a handy
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; frames-per-second trigger.
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lda #NO_INTERRUPTS
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bne :no_interrupts
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PushLong #0
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pea $0015 ; Get the existing 1-second interrupt handler and save
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_GetVector
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PullLong OldOneSecVec
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pea $0015 ; Set the new handler and enable interrupts
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PushLong #OneSecHandler
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_SetVector
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pea $0006
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_IntSource
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PushLong #VBLTASK ; Also register a Heart Beat Task
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_SetHeartBeat
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:no_interrupts
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; Start up the graphics engine...
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jsr MemInit ; Allocate memory
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jsr BlitInit ; Initialize the memory
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jsr GrafInit ; Initialize the graphics screen
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ldx #6 ; Gameboy Advance size
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jsr SetScreenMode
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lda #0 ; Set the virtual Y-position
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jsr SetBG0YPos
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lda #0 ; Set the virtual X-position
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jsr SetBG0XPos
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jsr _InitBG1 ; Initialize the second background
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lda #0
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jsr _ClearBG1Buffer
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; Load a picture and copy it into Bank $E1. Then turn on the screen.
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jsr AllocOneBank ; Alloc 64KB for Load/Unpack
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sta BankLoad ; Store "Bank Pointer"
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EvtLoop
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jsr WaitForKey
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cmp #'q'
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bne :1
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brl Exit
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:1 cmp #'l'
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bne :1_1
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jsr DoLoadPic
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bra EvtLoop
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:1_1 cmp #'b'
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bne :2
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jsr DoLoadBG1
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bra EvtLoop
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:2 cmp #'m'
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bne :3
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jsr DumpBanks
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bra EvtLoop
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:3 cmp #'f' ; render a 'f'rame
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bne :4
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jsr DoFrame
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bra EvtLoop
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:4 cmp #'h' ; Show the 'h'eads up display
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bne :5
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jsr DoHUP
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bra EvtLoop
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:5 cmp #'1' ; User selects a new screen size
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bcc :6
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cmp #'9'+1
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bcs :6
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sec
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sbc #'1'
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tax
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jsr SetScreenMode
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brl EvtLoop
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:6 cmp #'t'
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bne :7
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jsr DoTiles
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brl EvtLoop
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:7 cmp #$15 ; left = $08, right = $15, up = $0B, down = $0A
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bne :8
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lda #1
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jsr MoveRight
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brl EvtLoop
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:8 cmp #$08
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bne :9
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lda #1
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jsr MoveLeft
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brl EvtLoop
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:9 cmp #$0B
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bne :10
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lda #1
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jsr MoveUp
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brl EvtLoop
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:10 cmp #$0A
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bne :11
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lda #1
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jsr MoveDown
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brl EvtLoop
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:11 cmp #'d'
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bne :12
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lda #1
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jsr Demo
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brl EvtLoop
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:12 cmp #'c'
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bne :13
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ldx #$00E1
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lda #$2000
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jsr CopyPicToField
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brl EvtLoop
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:13 brl EvtLoop
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; Exit code
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Exit
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lda #NO_INTERRUPTS
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bne :no_interrupts
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pea $0007 ; disable 1-second interrupts
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_IntSource
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PushLong #VBLTASK ; Remove our heartbeat task
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_DelHeartBeat
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pea $0015
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PushLong OldOneSecVec ; Reset the interrupt vector
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_SetVector
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:no_interrupts
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PushWord UserId ; Deallocate all of our memory
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_DisposeAll
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_QuitGS qtRec
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bcs Fatal
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Fatal brk $00
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; Allow the user to dynamically select one of the pre-configured screen sizes
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;
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; 1. Full Screen : 40 x 25 320 x 200 (32,000 bytes (100.0%))
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; 2. Sword of Sodan : 34 x 24 272 x 192 (26,112 bytes ( 81.6%))
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; 3. ~NES : 32 x 25 256 x 200 (25,600 bytes ( 80.0%))
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; 4. Task Force : 32 x 22 256 x 176 (22,528 bytes ( 70.4%))
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; 5. Defender of the World : 35 x 20 280 x 160 (22,400 bytes ( 70.0%))
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; 6. Rastan : 32 x 20 256 x 160 (20,480 bytes ( 64.0%))
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; 7. Game Boy Advanced : 30 x 20 240 x 160 (19,200 bytes ( 60.0%))
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; 8. Ancient Land of Y's : 36 x 16 288 x 128 (18,432 bytes ( 57.6%))
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; 9. Game Boy Color : 20 x 18 160 x 144 (11,520 bytes ( 36.0%))
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; 10. DEBUG : 40 x 1 320 x 1
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; X=mode number
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]ScreenModeWidth dw 320,272,256,256,280,256,240,288,160,320
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]ScreenModeHeight dw 200,192,200,176,160,160,160,128,144,1
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SetScreenMode cpx #9
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bcc :rangeOk
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ldx #9
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:rangeOk txa
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asl
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tax
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lda #320 ; Calculate the screen offset
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sec
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sbc: ]ScreenModeWidth,x
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lsr
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lsr
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xba
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pha
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lda #200
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sec
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sbc: ]ScreenModeHeight,x
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lsr
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ora 1,s
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sta 1,s
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ldy: ]ScreenModeHeight,x
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lda: ]ScreenModeWidth,x
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lsr
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tax
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pla
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jsr SetScreenRect
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jsr FillScreen
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rts
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SecondsStr str 'SECONDS'
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TicksStr str 'TICKS'
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; Print a bunch of messages on screen
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DoHUP
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lda #SecondsStr
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ldx #{160-12*4}
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ldy #$7777
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jsr DrawString
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lda OneSecondCounter ; Number of elapsed seconds
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ldx #{160-4*4} ; Render the word 4 charaters from right edge
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jsr DrawWord
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lda #TicksStr
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ldx #{8*160+160-12*4}
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ldy #$7777
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jsr DrawString
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PushLong #0
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_GetTick
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pla
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plx
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ldx #{8*160+160-4*4}
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jsr DrawWord
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rts
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; Fill up the virtual buffer with tile data
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DoTiles
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:row equ 1
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:column equ 3
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:tile equ 5
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pea $0000 ; Allocate local variable space
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pea $0000
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pea $0000
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:rowloop
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lda #0
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sta :column,s
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lda #$0010
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sta :tile,s
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:colloop
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lda :row,s
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tay
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lda :column,s
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tax
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lda :tile,s
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jsr CopyTile
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; lda :tile,s
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; eor #$0003
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; sta :tile,s
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lda :column,s
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inc
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sta :column,s
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cmp #40
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bcc :colloop
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lda :row,s
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inc
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sta :row,s
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cmp #25
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bcc :rowloop
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pla ; restore the stack
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pla
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pla
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rts
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; Set up the code field and render it
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DoFrame
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lda #$FFFF
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sta DirtyBits
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jsr Render ; Render the play field
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rts
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; Load a binary file in the BG1 buffer
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DoLoadBG1
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lda BankLoad
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ldx #BG1DataFile
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jsr LoadFile
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lda BankLoad
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xba
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pha
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and #$00FF
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tax
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pla
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and #$FF00
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ldy BG1DataBank
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jsr CopyBinToBG1
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lda BankLoad
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ldx #BG1AltDataFile
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jsr LoadFile
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lda BankLoad
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xba
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pha
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and #$00FF
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tax
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pla
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and #$FF00
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ldy BG1AltBank
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jsr CopyBinToBG1
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rts
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; Load a simple picture format onto the SHR screen
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DoLoadPic
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lda BankLoad
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ldx #ImageName ; Load+Unpack Boot Picture
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jsr LoadPicture ; X=Name, A=Bank to use for loading
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lda BankLoad ; Copy it into the code field
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clc
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adc #$0080
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xba
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pha
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and #$00FF
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tax
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pla
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and #$FF00
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jsr CopyPicToField
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rts
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; Copy a loaded SHR picture into the code field
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;
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; A=low word of picture address
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; X=high workd of pixture address
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;
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; Picture must be within one bank
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CopyPicToField
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:srcptr equ tmp0
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:line_cnt equ tmp2
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:dstptr equ tmp3
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:col_cnt equ tmp5
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sta :srcptr
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stx :srcptr+2
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stz :line_cnt
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:rloop
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lda :line_cnt ; get the pointer to the code field line
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asl
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tax
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lda BTableLow,x
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sta :dstptr
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lda BTableHigh,x
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sta :dstptr+2
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ldx #162 ; move backwards in the code field
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ldy #0 ; move forward in the image data
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lda #80 ; keep a running column count
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sta :col_cnt
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:cloop
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phy
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lda [:srcptr],y
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ldy Col2CodeOffset,x ; Get the offset to the code from the line start
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cmp #0 ; Empty values are transparent
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beq :transparent
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pha
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lda #$00F4 ; PEA instruction
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sta [:dstptr],y
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iny
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pla
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sta [:dstptr],y
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bra :next
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:transparent
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lda #$B1 ; LDA (dp),y
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sta [:dstptr],y
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iny
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lda 1,s ; load the saved Y-index
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ora #$4800 ; put a PHA after the offset
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sta [:dstptr],y
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:next
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ply
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dex
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dex
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iny
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iny
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dec :col_cnt
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bne :cloop
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lda :srcptr
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clc
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adc #160
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sta :srcptr
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inc :line_cnt
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lda :line_cnt
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cmp #200
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bcc :rloop
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rts
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; Copy a binary image data file into BG1. Assumes the file is the correct size.
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;
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; A=low word of picture address
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; X=high word of pixture address
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; Y=high word of BG1 bank
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CopyBinToBG1
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:srcptr equ tmp0
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:line_cnt equ tmp2
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:dstptr equ tmp3
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:col_cnt equ tmp5
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sta :srcptr
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stx :srcptr+2
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sty :dstptr+2 ; Everything goes into this bank
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stz :line_cnt
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:rloop
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lda :line_cnt ; get the pointer to the code field line
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asl
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tax
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lda BG1YTable,x
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sta :dstptr
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ldy #0 ; move forward in the image data and image data
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:cloop
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lda [:srcptr],y
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sta [:dstptr],y
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iny
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iny
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cpy #164
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bcc :cloop
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lda [:srcptr] ; Duplicate the last byte in the extra space at the end of the line
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sta [:dstptr],y
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lda :srcptr
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clc
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adc #164 ; Each line is 328 pixels
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sta :srcptr
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inc :line_cnt
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lda :line_cnt
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cmp #208 ; A total of 208 lines
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bcc :rloop
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rts
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****************************************
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* Fatal Error Handler *
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****************************************
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PgmDeath tax
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pla
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inc
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phx
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phk
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pha
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bra ContDeath
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PgmDeath0 pha
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pea $0000
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pea $0000
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ContDeath ldx #$1503
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jsl $E10000
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; Interrupt handlers. We install a heartbeat (1/60th second and a 1-second timer)
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OneSecHandler mx %11
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phb
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pha
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phk
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plb
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rep #$20
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inc OneSecondCounter
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sep #$20
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ldal $E0C032
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and #%10111111 ;clear IRQ source
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stal $E0C032
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pla
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plb
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clc
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rtl
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mx %00
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OneSecondCounter dw 0
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OldOneSecVec ds 4
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VBLTASK hex 00000000
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dw 0
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hex 5AA5
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; Blitter initialization
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BlitInit
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stz ScreenHeight
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stz ScreenWidth
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stz ScreenY0
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stz ScreenY1
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stz ScreenX0
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stz ScreenX1
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stz ScreenTileHeight
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stz ScreenTileWidth
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stz StartX
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stz StartY
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stz EngineMode
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stz DirtyBits
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stz LastPatchOffset
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]step equ 0
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lup 13
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ldx #BlitBuff
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lda #^BlitBuff
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ldy #]step
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jsr BuildBank
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]step equ ]step+4
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--^
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rts
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; Graphic screen initialization
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GrafInit
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jsr ShadowOn
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jsr GrafOn
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lda #$8888
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jsr ClearToColor
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lda #0000
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jsr SetSCBs
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ldx #DefaultPalette
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lda #0
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jsr SetPalette
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rts
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;DefaultPalette dw $0000,$007F,$0090,$0FF0
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; dw $000F,$0080,$0f70,$0FFF
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dw $0fa9,$0ff0,$00e0,$04DF
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dw $0d00,$078f,$0ccc,$0FFF
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DefaultPalette dw $09BE,$0AA6,$0DC9,$0DB7,$09AA
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dw $0080,$0f70,$0FFF
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dw $0fa9,$0ff0,$00e0,$04DF
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dw $0d00,$078f,$0ccc,$0FFF
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; Return the current border color ($0 - $F) in the accumulator
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GetBorderColor lda #0000
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sep #$20
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ldal BORDER_REG
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and #$0F
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rep #$20
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rts
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; Set the border color to the accumulator value.
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SetBorderColor sep #$20 ; ACC = $X_Y, REG = $W_Z
|
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eorl BORDER_REG ; ACC = $(X^Y)_(Y^Z)
|
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and #$0F ; ACC = $0_(Y^Z)
|
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eorl BORDER_REG ; ACC = $W_(Y^Z^Z) = $W_Y
|
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stal BORDER_REG
|
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rep #$20
|
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rts
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|
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; Clear to SHR screen to a specific color
|
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ClearToColor ldx #$7D00 ;start at top of pixel data! ($2000-9D00)
|
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:clearloop dex
|
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dex
|
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stal SHR_SCREEN,x ;screen location
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bne :clearloop ;loop until we've worked our way down to 0
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rts
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|
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; Set a palette values
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; A = palette number, X = palette address
|
|
SetPalette
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and #$000F ; palette values are 0 - 15 and each palette is 32 bytes
|
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asl
|
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asl
|
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asl
|
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asl
|
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asl
|
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txy
|
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tax
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|
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]idx equ 0
|
|
lup 16
|
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lda: $0000+]idx,y
|
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stal SHR_PALETTES+]idx,x
|
|
]idx equ ]idx+2
|
|
--^
|
|
rts
|
|
|
|
; Initialize the SCB
|
|
SetSCBs ldx #$0100 ;set all $100 scbs to A
|
|
:scbloop dex
|
|
dex
|
|
stal SHR_SCB,x
|
|
bne :scbloop
|
|
rts
|
|
|
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; Turn SHR screen On/Off
|
|
GrafOn sep #$20
|
|
lda #$81
|
|
stal NEW_VIDEO_REG
|
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rep #$20
|
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rts
|
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|
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GrafOff sep #$20
|
|
lda #$01
|
|
stal NEW_VIDEO_REG
|
|
rep #$20
|
|
rts
|
|
|
|
; Enable/Disable Shadowing.
|
|
ShadowOn sep #$20
|
|
ldal SHADOW_REG
|
|
and #$F7
|
|
stal SHADOW_REG
|
|
rep #$20
|
|
rts
|
|
|
|
ShadowOff sep #$20
|
|
ldal SHADOW_REG
|
|
ora #$08
|
|
stal SHADOW_REG
|
|
rep #$20
|
|
rts
|
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|
|
GetVBL sep #$20
|
|
ldal VBL_HORZ_REG
|
|
asl
|
|
ldal VBL_VERT_REG
|
|
rol ; put V5 into carry bit, if needed. See TN #39 for details.
|
|
rep #$20
|
|
and #$00FF
|
|
rts
|
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|
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WaitForVBL sep #$20
|
|
:wait1 ldal VBL_STATE_REG ; If we are already in VBL, then wait
|
|
bmi :wait1
|
|
:wait2 ldal VBL_STATE_REG
|
|
bpl :wait2 ; spin until transition into VBL
|
|
rep #$20
|
|
rts
|
|
|
|
WaitForKey sep #$20
|
|
stal KBD_STROBE_REG ; clear the strobe
|
|
:WFK ldal KBD_REG
|
|
bpl :WFK
|
|
rep #$20
|
|
and #$007F
|
|
rts
|
|
|
|
ClearKeyboardStrobe sep #$20
|
|
stal KBD_STROBE_REG
|
|
rep #$20
|
|
rts
|
|
|
|
; Graphics helpers
|
|
|
|
LoadPicture
|
|
jsr LoadFile ; X=Nom Image, A=Banc de chargement XX/00
|
|
bcc :loadOK
|
|
rts
|
|
:loadOK
|
|
jsr UnpackPicture ; A=Packed Size
|
|
rts
|
|
|
|
|
|
UnpackPicture sta UP_PackedSize ; Size of Packed Data
|
|
lda #$8000 ; Size of output Data Buffer
|
|
sta UP_UnPackedSize
|
|
lda BankLoad ; Banc de chargement / Decompression
|
|
sta UP_Packed+1 ; Packed Data
|
|
clc
|
|
adc #$0080
|
|
stz UP_UnPacked ; On remet a zero car modifie par l'appel
|
|
stz UP_UnPacked+2
|
|
sta UP_UnPacked+1 ; Unpacked Data buffer
|
|
|
|
PushWord #0 ; Space for Result : Number of bytes unpacked
|
|
PushLong UP_Packed ; Pointer to buffer containing the packed data
|
|
PushWord UP_PackedSize ; Size of the Packed Data
|
|
PushLong #UP_UnPacked ; Pointer to Pointer to unpacked buffer
|
|
PushLong #UP_UnPackedSize ; Pointer to a Word containing size of unpacked data
|
|
_UnPackBytes
|
|
pla ; Number of byte unpacked
|
|
rts
|
|
|
|
UP_Packed hex 00000000 ; Address of Packed Data
|
|
UP_PackedSize hex 0000 ; Size of Packed Data
|
|
UP_UnPacked hex 00000000 ; Address of Unpacked Data Buffer (modified)
|
|
UP_UnPackedSize hex 0000 ; Size of Unpacked Data Buffer (modified)
|
|
|
|
; Basic I/O function to load files
|
|
|
|
LoadFile stx openRec+4 ; X=File, A=Bank/Page XX/00
|
|
sta readRec+5
|
|
|
|
:openFile _OpenGS openRec
|
|
bcs :openReadErr
|
|
lda openRec+2
|
|
sta eofRec+2
|
|
sta readRec+2
|
|
|
|
_GetEOFGS eofRec
|
|
lda eofRec+4
|
|
sta readRec+8
|
|
lda eofRec+6
|
|
sta readRec+10
|
|
|
|
_ReadGS readRec
|
|
bcs :openReadErr
|
|
|
|
:closeFile _CloseGS closeRec
|
|
clc
|
|
lda eofRec+4 ; File Size
|
|
rts
|
|
|
|
:openReadErr jsr :closeFile
|
|
nop
|
|
nop
|
|
|
|
PushWord #0
|
|
PushLong #msgLine1
|
|
PushLong #msgLine2
|
|
PushLong #msgLine3
|
|
PushLong #msgLine4
|
|
_TLTextMountVolume
|
|
pla
|
|
cmp #1
|
|
bne :loadFileErr
|
|
brl :openFile
|
|
:loadFileErr sec
|
|
rts
|
|
|
|
msgLine1 str 'Unable to load File'
|
|
msgLine2 str 'Press a key :'
|
|
msgLine3 str ' -> Return to Try Again'
|
|
msgLine4 str ' -> Esc to Quit'
|
|
|
|
; Data storage
|
|
BG1DataFile strl '1/bg1a.bin'
|
|
BG1AltDataFile strl '1/bg1b.bin'
|
|
|
|
ImageName strl '1/test.pic'
|
|
MasterId ds 2
|
|
UserId ds 2
|
|
BankLoad hex 0000
|
|
|
|
openRec dw 2 ; pCount
|
|
ds 2 ; refNum
|
|
adrl ImageName ; pathname
|
|
|
|
eofRec dw 2 ; pCount
|
|
ds 2 ; refNum
|
|
ds 4 ; eof
|
|
|
|
readRec dw 4 ; pCount
|
|
ds 2 ; refNum
|
|
ds 4 ; dataBuffer
|
|
ds 4 ; requestCount
|
|
ds 4 ; transferCount
|
|
|
|
closeRec dw 1 ; pCount
|
|
ds 2 ; refNum
|
|
|
|
qtRec adrl $0000
|
|
da $00
|
|
|
|
put App.Init.s
|
|
put App.Msg.s
|
|
put Actions.s
|
|
put font.s
|
|
put Render.s
|
|
put blitter/Blitter.s
|
|
put blitter/Horz.s
|
|
put blitter/PEISlammer.s
|
|
put blitter/Tables.s
|
|
put blitter/Template.s
|
|
put blitter/Tiles.s
|
|
put blitter/Vert.s
|
|
put blitter/BG1.s
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|