;*************************************************************** ; The Rectangle struct (same as Commodore's Rectangle struct) ;*************************************************************** rsreset GSRECT_MINX rs.w 1 ;left edge of rectangle GSRECT_MINY rs.w 1 ;top edge of rectangle GSRECT_MAXX rs.w 1 ;right edge of rectangle GSRECT_MAXY rs.w 1 ;bottom edge of rectangle GSRECT_SIZEOF rs.b 0 ;*************************************************************** ; The gs_viewport struct ;*************************************************************** rsreset GSVP_NEXT rs.l 1 ;ptr to next viewport in display GSVP_COLORTBL rs.l 1 ;ptr to color talbe for viewport GSVP_COLORS rs.l 1 ;number of color table entries GSVP_UCOP rs.l 1 ;ptr to user copper list struct (or NULL if none) GSVP_HEIGHT rs.l 1 ;height of viewport in scan lines GSVP_WIDTH rs.l 1 ;width of viewport in pixels GSVP_DEPTH rs.l 1 ;number of bitplanes to use for viewport GSVP_BMHEIGHT rs.l 1 ;bitmap height (in rows) (used only if allocating bitmap) GSVP_BMWIDTH rs.l 1 ;bitmap width (in pixels) (used only if allocating bitmap) GSVP_TOP rs.l 1 ;viewport Y offset (in rows) from display start GSVP_LEFT rs.l 1 ;viewport X offset (in pixels) from display start GSVP_XOFF rs.l 1 ;X offset within bitmap (in pixels) GSVP_YOFF rs.l 1 ;Y offset within bitmap (in pixels) GSVP_FLAGS rs.l 1 ;flags for display routines GSVP_VPE1 rs.l 1 ;ptr to 2.xx & up ViewPortExtra struct (SYSTEM USE) GSVP_VPE2 rs.l 1 ;ptr to 2.xx & up ViewPortExtra struct (SYSTEM USE) GSVP_BITMAP1 rs.l 1 ;ptr to 1st bitmap struct GSVP_BITMAP2 rs.l 1 ;ptr to 2nd bitmap struct GSVP_EXTEND rs.l 1 ;reserved for future expansion GSVP_DCLIP rs.b GSRECT_SIZEOF ;display clip for 2.xx & up displays ; remainder is for GDS system use ONLY!! GSVP_VIEWPORT1 rs.l 1 ;ptr to system ViewPort struct for 1st display page GSVP_VIEWPORT2 rs.l 1 ;ptr to system ViewPort struct for 2nd display page GSVP_RASINFO1 rs.l 1 ;ptr to system RasInfo struct for 1st display page GSVP_RASINFO2 rs.l 1 ;ptr to system RasInfo struct for 2nd display page GSVP_LOF_BPLCON1 rs.l 1 ;offset to horizontal shift register copper instruction GSVP_LOF_BPLPTR1 rs.l 1 ;offset to 1st bitplane pointer copper instruction GSVP_SHF_BPLCON1 rs.l 1 ;offset to horizontal shift register copper instruction GSVP_SHF_BPLPTR1 rs.l 1 ;offset to 1st bitplane pointer copper instruction GSVP_LOF_BPLCON2 rs.l 1 ;offset to horizontal shift register copper instruction GSVP_LOF_BPLPTR2 rs.l 1 ;offset to 1st bitplane pointer copper instruction GSVP_SHF_BPLCON2 rs.l 1 ;offset to horizontal shift register copper instruction GSVP_SHF_BPLPTR2 rs.l 1 ;offset to 1st bitplane pointer copper instruction GSVP_pf1scroll rs.w 1 ;horizontal scroll value, playfield 1 GSVP_pf2scroll rs.w 1 ;horizontal scroll value, playfield 2 GSVP_XOFF2 rs.l 1 ;playfield 2 X offset within bitmap GSVP_YOFF2 rs.l 1 ;playfield 2 Y offset within bitmap GSVP_LOF_COP1 rs.w 1 ;offset to viewport copper list within display list GSVP_SHF_COP1 rs.w 1 GSVP_LOF_COP2 rs.w 1 GSVP_SHF_COP2 rs.w 1 GSVP_LOF_PLANES1 rs.l 8 ;bitplane pointers GSVP_SHF_PLANES1 rs.l 8 GSVP_LOF_PLANES2 rs.l 8 GSVP_SHF_PLANES2 rs.l 8 GSVP_SIZEOF rs.l 0 ; gs_viewport flags: GSVPF_ALLOCBM EQU $01 ;let the display setup routine allocate bitmap(s) GSVPF_DCLIP EQU $02 ;user specified display clip GSVPF_DPF EQU $04 ;set viewport to operate in dual playfield mode ;*************************************************************** ; The display struct ;*************************************************************** rsreset GSV_OLDVIEW rs.l 1 ;ptr to previous display view GSV_VE1 rs.l 1 ;2.xx & up ViewExtra struct (ptr to) GSV_VE2 rs.l 1 ;2.xx & up ViewExtra struct (ptr to) GSV_DXOFFSET rs.l 1 ;display X offset (in pixels) for 1.3 OS GSV_DYOFFSET rs.l 1 ;display Y offset (in rows) for 1.3 OS GSV_MODES rs.l 1 ;display mode ID GSV_FLAGS rs.l 1 ;flags for display routines GSV_VIEWPORT rs.l 1 ;ptr to 1st gs_viewport in display GSV_EXTEND rs.l 1 ;reserved for future expansion ; remainder is for GDS system use ONLY GSV_VIEW1 rs.l 1 ;ptr to system View struct for 1st display page GSV_VIEW2 rs.l 1 ;ptr to system View struct for 2nd display page GSV_LOF_COP1 rs.l 1 ;ptr to long frame hardware copper list for view 1 GSV_SHF_COP1 rs.l 1 ;ptr to short frame hardware copper list for view 1 GSV_LOF_COP2 rs.l 1 ;ptr to long frame hardware copper list for view 2 GSV_SHF_COP2 rs.l 1 ;ptr to short frame hardware copper list for view 2 GSV_SIZEOF rs.b 0 ;size of display struct ; display flags: GSVF_DOUBLE EQU $0001 ;double buffered display GSVF_PAGE1 EQU $0002 ;SYSTEM FLAG: page 1 currently display GSVF_EASY EQU $0004 ;SYSTEM FLAG: display set up through easy call GSVF_DISPLAYED EQU $0008 ;SYSTEM FLAG: custom display has been shown on screen GSVF_FLIP EQU $0010 ;set by gs_flip_display & cleared when new page shown GSVF_SCROLL1 EQU $0020 ;SYSTEM FLAG: reload copper list with new scroll values GSVF_SCROLL2 EQU $0040 ;SYSTEM FLAG: reload copper list with new scroll values GSVF_ECSENA EQU $0080 ;SYSTEM FLAG: used by AGA chipset scroll handling GSVF_BPAGEM EQU $0100 ;SYSTEM FLAG: (ditto) GSVF_AGA_SCROLL EQU $0200 ;SYSTEM FLAG: use enhanced GA scrolling methods GSVF_SUPER EQU $0400 ;SYSTEM FLAG: used by AGA chipset scroll handling GSVF_SCROLLABLE EQU $0800 ;allow view to be scrolled GSVF_DDFADJUST EQU $1000 ;display system adjusted data fetch for smooth scrolling ; return values for gs_scroll_vp: GSVP_PF1_LEFT EQU $01 ;display at leftmost edge GSVP_PF1_RIGHT EQU $02 ;display at rightmost edge GSVP_PF1_TOP EQU $04 ;display at topmost edge GSVP_PF1_BOTTOM EQU $08 ;display at bottom most edge GSVP_PF2_LEFT EQU $10 ;display at leftmost edge GSVP_PF2_RIGHT EQU $20 ;display at rightmost edge GSVP_PF2_TOP EQU $40 ;display at topmost edge GSVP_PF2_BOTTOM EQU $80 ;display at bottom most edge GSVP_NOVP EQU -1 ;invalid viewport specified