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- ;-------T-------T------------------------T----------------------------------;
- ;Name: Scroll Memory
- ;Author: Paul Manias
- ;Copyright: DreamWorld Productions (c) 1996-1997. Freely distributable.
- ;
- ;This demo shows you the power of the scrolling features by allowing you
- ;to scroll all over your chip ram :-). Usually you would set limits to stop
- ;you from going over the boundaries, but that's up to you.
- ;
- ;Use mouse to move around, LMB exits.
-
- INCDIR "GMSDev:Includes/"
- INCLUDE "dpkernel/dpkernel.i"
-
- SECTION "Demo",CODE
-
- ;===========================================================================;
- ; INITIALISE DEMO
- ;===========================================================================;
-
- STARTDPK
-
- Start: MOVEM.L A0-A6/D1-D7,-(SP)
- move.l DPKBase(pc),a6
- lea ScreenTags(pc),a0
- sub.l a1,a1
- CALL Init
- tst.l d0
- beq.s .Exit
-
- lea PictureTags(pc),a0
- move.l Screen(pc),a1
- move.l GS_MemPtr1(a1),PicData
- sub.l a1,a1
- CALL Init
- tst.l d0
- beq.s .Exit
-
- moveq #ID_JOYDATA,d0 ;Get joydata structure.
- CALL Get
- move.l d0,JoyData
- beq.s .Exit
- move.l d0,a0 ;Initialise the joydata structure.
- sub.l a1,a1
- CALL Init
- tst.l d0
- beq.s .Exit
-
- move.l Screen(pc),a0
- CALL Display
-
- bsr.s Main
-
- .Exit move.l DPKBase(pc),a6
- move.l JoyData(pc),a0
- CALL Free
- move.l Picture(pc),a0
- CALL Free
- move.l Screen(pc),a0
- CALL Free
- MOVEM.L (SP)+,A0-A6/D1-D7
- moveq #ERR_OK,d0
- rts
-
- ;===========================================================================;
- ; MAIN LOOP
- ;===========================================================================;
-
- Main:
- .loop move.l DPKBase(pc),a6
- move.l JoyData(pc),a0
- CALL Query
-
- move.l JoyData(pc),a0
- move.w JD_XChange(a0),d0
- move.w JD_YChange(a0),d1
- move.l JD_Buttons(a0),d2
- btst #JB_RMB,d2
- bne.s .done
- ;btst #JB_LMB,d2
- ;bne.s .MoveScreen
- .MovePicture
- move.l SCRBase(pc),a6
- move.l Screen(pc),a0
- add.w d0,GS_BmpXOffset(a0)
- add.w d1,GS_BmpYOffset(a0)
- CALL scrRemakeScreen
- move.l Screen(pc),a0
- CALL scrMoveBitmap
- CALL scrWaitAVBL
- bra.s .loop
-
- .MoveScreen
- move.l SCRBase(pc),a6
- move.l Screen(pc),a0
- add.w d0,GS_XOffset(a0)
- add.w d1,GS_YOffset(a0)
- move.l Screen(pc),a0
- CALL scrRemakeScreen
- move.l Screen(pc),a0
- CALL scrMoveBitmap
- CALL scrWaitAVBL
- bra.s .loop
- .done rts
-
- ;===========================================================================;
- ; DATA
- ;===========================================================================;
-
- JoyData: dc.l 0
-
- ScreenTags: dc.l TAGS_SCREEN
- Screen: dc.l 0
- dc.l GSA_Palette,SPalette
- dc.l GSA_Width,320
- dc.l GSA_Height,256
- dc.l GSA_BitmapTags,0
- dc.l BMA_AmtColours,32
- dc.l TAGEND,0
- dc.l GSA_Attrib,HSCROLL|VSCROLL|SBUFFER|CENTRE
- dc.l TAGEND
-
- PictureTags: dc.l TAGS_PICTURE
- Picture: dc.l 0
- dc.l PCA_BitmapTags,0
- dc.l BMA_Data
- PicData: dc.l 0
- dc.l BMA_Width,320
- dc.l BMA_Height,256
- dc.l BMA_AmtColours,32
- dc.l TAGEND,0
- dc.l PCA_Palette,SPalette
- dc.l PCA_Source,.file
- dc.l TAGEND
-
- .file FILENAME "GMS:demos/data/PIC.Green"
-
- SPalette: dc.l PALETTE,32
- dc.l $000000,$103000,$F0C0B0,$F0A090,$D08080,$906050
- dc.l $604040,$201010,$400000,$404040,$F0F000,$403020
- dc.l $C0C000,$105000,$500010,$808000,$206010,$207010
- dc.l $308020,$409020,$50A030,$50B040,$607070,$60C040
- dc.l $708080,$90A0A0,$B0C0C0,$800010,$900010,$A00020
- dc.l $700010,$600010
-
- ;===========================================================================;
-
- ProgName: dc.b "Scroll Memory",0
- ProgAuthor: dc.b "Paul Manias",0
- ProgDate: dc.b "10 December 1997",0
- ProgCopyright: dc.b "DreamWorld Productions (c) 1996-1997. Freely distributable.",0
- ProgShort: dc.b "Allows you to scroll over your video memory.",0
- even
-