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- ;Alteration of screen dimensions
- ;-------------------------------
- ;Just a test routine for height and width alteration. Move the joystick
- ;around to move the entire screen, while moving the mouse to alter the
- ;height and width.
- ;
- ;Press LMB to exit.
-
- opt o+
-
- INCLUDE "exec/exec_lib.i"
- INCLUDE "games/games_lib.i"
- INCLUDE "games/games.i
-
- CALL MACRO
- jsr _LVO\1(a6)
- ENDM
-
- SECTION "Redimension",CODE
-
- ;===========================================================================;
- ; INITIALISE DEMO
- ;===========================================================================;
-
- Start: MOVEM.L A0-A6/D1-D7,-(SP)
- move.l ($4).w,a6
- lea GMS_Name(pc),a1
- moveq #$00,d0
- CALL OpenLibrary
- move.l d0,GMS_Base
- beq Quit
-
- move.l GMS_Base(pc),a6
- CALL SetUserPri
-
- lea ScreenStruct(pc),a0
- CALL Add_Screen
- tst.l d0
- bne Error
-
- lea Picture(pc),a1 ;a1 = Picture struct.
- move.l SS_MemPtr1(a0),PIC_Data(a1)
- lea PicFile(pc),a0 ;a0 = Picture file.
- CALL LoadPic ;>> = Load the picture.
- tst.w d0
- bne ReturnToDOS
-
- lea ScreenStruct(pc),a0 ;Now show the screen/pic.
- CALL Show_Screen
-
- ;===========================================================================;
- ; MAIN LOOP
- ;===========================================================================;
-
- Loop: moveq #JPORT1,d0 ;Read from port 1
- moveq #JT_ZBXY,d1
- CALL Read_JoyPort ;Go get port status.
- btst #MB_LMB,d0
- bne Fade_Here
- move.w d0,d1
- ext.w d0
- asr.w #8,d1
- add.w d1,SS_ScrWidth(a0)
- add.w d0,SS_ScrHeight(a0)
-
- moveq #JPORT2,d0 ;Read from port 2
- moveq #JT_ZBXY,d1
- CALL Read_JoyPort ;Go get port status.
- btst #JB_FIRE1,d0
- bne.s Fade_Here
- move.w d0,d1
- ext.w d0
- asr.w #8,d1
- add.w d1,SS_ScrXOffset(a0)
- add.w d0,SS_ScrYOffset(a0)
-
- .chksrx cmp.w #35,SS_ScrXOffset(a0)
- ble.s .chkslx
- move.w #35,SS_ScrXOffset(a0)
-
- .chkslx cmp.w #-40,SS_ScrXOffset(a0)
- bge.s .chksty
- move.w #-40,SS_ScrXOffset(a0)
-
- .chksty cmp.w #-20,SS_ScrYOffset(a0)
- bge.s .chkty
- move.w #-20,SS_ScrYOffset(a0)
-
- .chkty tst.w SS_ScrHeight(a0)
- bge.s .chkby
- clr.w SS_ScrHeight(a0)
-
- .chkby cmp.w #256,SS_ScrHeight(a0)
- ble.s .chklx
- move.w #256,SS_ScrHeight(a0)
-
- .chklx cmp.w #1,SS_ScrWidth(a0)
- bge.s .chkrx
- move.w #1,SS_ScrWidth(a0)
-
- .chkrx cmp.w #320,SS_ScrWidth(a0)
- ble.s .done
- move.w #320,SS_ScrWidth(a0)
-
- .done CALL Wait_OSVBL ;Always wait for a VBL first.
- CALL Remake_Screen ;Reposition the screen now.
- bra Loop
-
- Fade_Here:
- moveq #$00,d0
- .Fade CALL Wait_OSVBL ;Keep looping until the fade is
- CALL B12_FadeToBlack ;completely finished (ie all
- tst.w d0 ;colours are black).
- bne.s .Fade
-
- ;===========================================================================;
- ; RETURN TO DOS
- ;===========================================================================;
-
- ReturnToDOS:
- move.l GMS_Base(pc),a6
- lea ScreenStruct(pc),a0
- CALL Delete_Screen ;Give back screen memory etc.
- Error: move.l GMS_Base(pc),a1
- move.l ($4).w,a6
- CALL CloseLibrary
- Quit: MOVEM.L (SP)+,A0-A6/D1-D7
- moveq #$00,d0
- rts
-
- ;===========================================================================;
- ; CODE-RELATIVE DATA
- ;===========================================================================;
-
- GMS_Name:
- dc.b "games.library",0
- even
- GMS_Base:
- dc.l 0
-
- AMT_PLANES = 5
-
- ScreenStruct:
- dc.l "GSV1",0
- dc.l 0,0,0 ;Screen_Mem1/2/3
- dc.l 0 ;Screen link.
- dc.l Palette ;Address of screen palette
- dc.l 0 ;Address of rasterlist.
- dc.l 0 ;Amt of colours in palette.
- dc.w 320,256,320,256 ;Screen & Pic Height/Width
- dc.w AMT_PLANES ;Amt_Planes
- dc.w 0,0 ;X/Y screen offset
- dc.w 0,0 ;X/Y picture offset
- dc.l 0 ;Special attributes
- dc.w LORES ;Screen mode
- dc.b INTERLEAVED ;Screen type
- dc.b 0 ;Reserved
- even
-
- Palette dc.w $0000,$0130,$0FCB,$0FA9,$0D88,$0965,$0644,$0211
- dc.w $0400,$0444,$0FF0,$0432,$0CC0,$0150,$0501,$0880
- dc.w $0261,$0271,$0382,$0492,$05A3,$05B4,$0677,$06C4
- dc.w $0788,$09AA,$0BCC,$0801,$0901,$0A02,$0701,$0601
-
- Picture dc.l "PCV1",0 ;Version header.
- dc.l 0 ;Source data.
- dc.w 320,256 ;Width, Height.
- dc.w AMT_PLANES ;Amount of Planes.
- dc.l 32 ;Amount of colours.
- dc.l Palette ;Source palette (remap).
- dc.w LORES ;Screen mode.
- dc.w INTERLEAVED ;Destination
- dc.l 0 ;Parameters.
-
- PicFile dc.b "GAMESLIB:data/IFF.Pic320",0
- even
-
-