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disasm: clipping comments

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This commit is contained in:
Joshua Bell 2019-01-26 10:34:13 -08:00
parent c2f58620e5
commit 79a3aaf27e
1 changed files with 47 additions and 21 deletions
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68
desktop/desktop_aux.s
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@ -2426,8 +2426,8 @@ start: lda more_drawing_needed_flag
;; --------------------------------------------------
;; Re-entry - pick up where we left off
;; cr_l = cr_r
;; vx = cr_r
;; cr_l = cr_r + 1
;; vx = cr_r + 1
lda cr_r
clc
adc #1
@ -2492,7 +2492,7 @@ next_pt:
set_bits:
MGTK_CALL MGTK::SetPortBits, portbits
;; if (cliprect::x2 < LA62B) more drawing is needed
;; if (cr_r < LA62B) more drawing is needed
lda cr_r+1
cmp LA62B+1
bne :+
@ -2570,9 +2570,9 @@ do_pt: lda pt_num
sub16 win_l, #2, win_l
sub16 icon_grafport::cliprect::x1, #2, icon_grafport::cliprect::x1
kTitleBarHeight = 14
kTitleBarHeight = 14 ; Should be 12? (But no visual bugs)
kScrollBarWidth = 20
kScrollBarHeight = 12
kScrollBarHeight = 12 ; BUG: Should be 10? (See #117)
;; --------------------------------------------------
;; Adjust window rect to account for title bar
@ -2580,19 +2580,19 @@ do_pt: lda pt_num
bit dialogbox_flag
bmi check_scrollbars
;; viewloc::ycoord -= 14
;; viewloc::ycoord -= kTitleBarHeight
lda win_t
sec
sbc #14
sbc #kTitleBarHeight
sta win_t
bcs :+
dec win_t+1
:
;; cliprect::y1 -= 14
;; cliprect::y1 -= kTitleBarHeight
lda icon_grafport::cliprect::y1
sec
sbc #14
sbc #kTitleBarHeight
sta icon_grafport::cliprect::y1
bcs :+
dec icon_grafport::cliprect::y1+1
@ -2648,38 +2648,62 @@ check_scrollbars:
;; win_b += viewloc::ycoord
add16 win_b, icon_grafport::viewloc::ycoord, win_b
;; ==================================================
;; At this point, win_r/t/l/b are the window edges
;; At this point, win_r/t/l/b are the window edges,
;; cr_r/t/l/b are the rect we know has at least one
;; corner overlapping the window.
;;
;; Cases (#=icon, %=result, :=window)
;;
;; . 1 :::: 4 :::: 7 ::::
;; . :::: :::: ::::
;; . :::## :##: %#:::
;; . %# %% %#
;; .
;; . 2 :::: 5 :::: 8 ::::
;; . :::#% :##: %#:::
;; . :::#% :##: %#:::
;; . :::: :::: ::::
;; .
;; . %# %% %#
;; . 3 :::## 6 :##: 9 %#:::
;; . :::: :::: ::::
;; . :::: :::: ::::
;; Cases 1/2/3 (and continue below)
;; if (cr_r > win_r)
;; cr_r = win_r + 1
;; . cr_r = win_r + 1
cmp16 cr_r, win_r
bmi :+
add16 win_r, #1, cr_r
jmp LA8D4
jmp vert
;; Cases 7/8/9 (and done)
;; if (win_l > cr_l)
;; cr_r = win_l
;; . cr_r = win_l
: cmp16 win_l, cr_l
bmi LA8D4
bmi vert
copy16 win_l, cr_r
jmp reclip
;; Cases 3/6 (and done)
;; icon visible above window?
;; if (win_t > cr_t)
;; cr_b = win_t
LA8D4: cmp16 win_t, cr_t
;; . cr_b = win_t
vert: cmp16 win_t, cr_t
bmi :+
copy16 win_t, cr_b
copy #1, more_drawing_needed_flag
jmp reclip
;; Cases 1/4 (and done)
;; icon visible below window?
;; if (win_b < cr_b)
;; cr_t = win_b + 2
;; vy = win_b + 2
;; . cr_t = win_b + 2
;; . vy = win_b + 2
: cmp16 win_b, cr_b
bpl LA923
bpl :+
lda win_b
clc
adc #2
@ -2692,9 +2716,11 @@ LA8D4: cmp16 win_t, cr_t
copy #1, more_drawing_needed_flag
jmp reclip
;; Case 2
;; obscured by window; just advance
;; cr_l = cr_r
;; vx = cr_r
LA923: lda cr_r
: lda cr_r
sta cr_l
sta vx
lda cr_r+1