You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
132 lines
4.0 KiB
132 lines
4.0 KiB
;---------------------------- Include File Header ---------------------------;
|
|
; lines.inc
|
|
;
|
|
; Line drawing constants and structures.
|
|
;
|
|
; NOTE: This file mirrors LINES.H. Changes here must be reflected in
|
|
; the .h file!
|
|
;
|
|
; See lines.h for a description of most defines.
|
|
;
|
|
;----------------------------------------------------------------------------;
|
|
|
|
STYLE_MAX_COUNT equ 16
|
|
STYLE_MAX_VALUE equ 3fffh
|
|
RUN_MAX equ 20
|
|
STRIP_MAX equ 100
|
|
STYLE_DENSITY equ 3
|
|
|
|
; For the ROP table:
|
|
|
|
MIX_XOR_OFFSET equ 8
|
|
|
|
AND_ZERO equ 0
|
|
AND_PEN equ 1
|
|
AND_NOTPEN equ 2
|
|
AND_ONE equ 3
|
|
|
|
XOR_ZERO equ (AND_ZERO shl MIX_XOR_OFFSET)
|
|
XOR_PEN equ (AND_PEN shl MIX_XOR_OFFSET)
|
|
XOR_NOTPEN equ (AND_NOTPEN shl MIX_XOR_OFFSET)
|
|
XOR_ONE equ (AND_ONE shl MIX_XOR_OFFSET)
|
|
|
|
;
|
|
; Flip and round flags:
|
|
;
|
|
|
|
FL_H_ROUND_DOWN equ 00000080h ; Set if x = 1/2 rounds to x = 1
|
|
FL_V_ROUND_DOWN equ 00008000h ; Set if y = 1/2 rounds to y = 1
|
|
|
|
FL_FLIP_D equ 00000005h ; Diagonal flip
|
|
FL_FLIP_V equ 00000008h ; Vertical flip
|
|
FL_FLIP_SLOPE_ONE equ 00000010h ; If slope is exactly one
|
|
FL_FLIP_HALF equ 00000002h ; Half flip
|
|
FL_FLIP_H equ 00000200h ; Horizontal (right-to-left) exchange
|
|
|
|
FL_ROUND_MASK equ 0000001ch ; Rounding is dependent on diagonal,
|
|
FL_ROUND_SHIFT equ 2 ; vertical flips and if slope is one
|
|
|
|
FL_RECTLCLIP_MASK equ 0000000ch ; When we unflip to do clipping, we
|
|
FL_RECTLCLIP_SHIFT equ 2 ; only have to look at diagonal and
|
|
; vertical flips
|
|
|
|
FL_STRIP_MASK equ 00000003h ; Which strip drawer we call is based
|
|
FL_STRIP_SHIFT equ 0 ; on if we did diagonal and/or half
|
|
; flips
|
|
|
|
FL_SIMPLE_CLIP equ 00000020h ; Denotes our clipping complexity
|
|
FL_COMPLEX_CLIP equ 00000040h
|
|
FL_CLIP equ (FL_SIMPLE_CLIP + FL_COMPLEX_CLIP)
|
|
|
|
FL_SET equ 00000800h ; If ROP is such that we don't have to
|
|
; read video memory
|
|
FL_ARBITRARYSTYLED equ 00000400h ; If the line is styled
|
|
FL_STYLED equ (FL_ARBITRARYSTYLED)
|
|
|
|
FL_STRIP_ARRAY_MASK equ 00000C00h ; Which strip arrays we look up depends
|
|
FL_STRIP_ARRAY_SHIFT equ 10 ; on if we're doing style and/or have
|
|
; a 'set' style ROP
|
|
|
|
; Simple flag bits in high byte:
|
|
|
|
FL_DONT_DO_HALF_FLIP equ 00002000h
|
|
|
|
; Miscellaneous DDA defines:
|
|
|
|
F equ 16
|
|
FLOG2 equ 4
|
|
|
|
STRIPS struc
|
|
|
|
; Updated by strip drawers:
|
|
|
|
ST_pjScreen dd ?
|
|
ST_bIsGap dd ?
|
|
|
|
ST_psp dd ?
|
|
ST_spRemaining dd ?
|
|
|
|
; Not modified by strip drawers:
|
|
|
|
ST_lNextScan dd ?
|
|
ST_plStripEnd dd ? ; usually won't be valid
|
|
ST_flFlips dd ?
|
|
ST_pspStart dd ?
|
|
ST_pspEnd dd ?
|
|
ST_xyDensity dd ?
|
|
ST_chAndXor dd ?
|
|
|
|
; We leave room for a couple of extra dwords at the end of the strips
|
|
; array that can be used by the strip drawers:
|
|
|
|
ST_alStrips dd (STRIP_MAX + 2) dup (?)
|
|
STRIPS ends
|
|
|
|
LINESTATE struc
|
|
LS_chAndXor dd ?
|
|
LS_spTotal dd ?
|
|
LS_spTotal2 dd ?
|
|
LS_spNext dd ?
|
|
LS_spComplex dd ?
|
|
|
|
LS_aspRtoL dd ?
|
|
LS_aspLtoR dd ?
|
|
|
|
LS_xyDensity dd ?
|
|
LS_cStyle dd ?
|
|
|
|
LS_ulStyleMaskLtoR dd ?
|
|
LS_ulStyleMaskRtoL dd ?
|
|
|
|
LS_bStartIsGap db ?
|
|
LS_filler3 db 3 dup (?)
|
|
LINESTATE ends
|
|
|
|
;
|
|
; This RUN structure must match that in winddi.h!
|
|
;
|
|
|
|
RUN struc
|
|
RUN_iStart dd ?
|
|
RUN_iStop dd ?
|
|
RUN ends
|