source: xtideuniversalbios/trunk/Assembly_Library/Src/Menu/MenuLocation.asm@ 181

Last change on this file since 181 was 181, checked in by krille_n_@…, 13 years ago

Changes to all parts of the project:

  • Size optimizations.
  • Added a define (EXCLUDE_FROM_XTIDECFG) to exclude unused library code from XTIDECFG.
  • Tried to minimize time spent with interrupts disabled.
  • Some minor attempts to improve speed (reordering instructions etc).
  • Tried to improve readability, did some cleanup and fixed some errors in comments.
File size: 3.8 KB
Line 
1; Project name : Assembly Library
2; Description : Functions for calculation menu window dimensions.
3
4; Section containing code
5SECTION .text
6
7;--------------------------------------------------------------------
8; MenuLocation_GetTextCoordinatesToAXforItemInAX
9; Parameters
10; AX: Item index
11; SS:BP: Ptr to MENU
12; Returns:
13; AL: Column (X)
14; AH: Row (Y)
15; Corrupts registers:
16; Nothing
17;--------------------------------------------------------------------
18ALIGN JUMP_ALIGN
19MenuLocation_GetTextCoordinatesToAXforItemInAX:
20 sub ax, [bp+MENU.wFirstVisibleItem] ; Item to line
21 xchg al, ah ; Line to AH, clear AL
22 add ax, (MENU_TEXT_ROW_OFFSET<<8) | MENU_TEXT_COLUMN_OFFSET
23 SKIP2B f ; cmp ax, <next instruction>
24 ; Fall to MenuLocation_GetItemBordersTopLeftCoordinatesToAX
25
26;--------------------------------------------------------------------
27; MenuLocation_GetItemBordersTopLeftCoordinatesToAX
28; MenuLocation_GetTitleTextTopLeftCoordinatesToAX
29; MenuLocation_GetTitleBordersTopLeftCoordinatesToAX
30; MenuLocation_GetInformationTextTopLeftCoordinatesToAX
31; MenuLocation_GetBottomBordersTopLeftCoordinatesToAX
32; Parameters
33; SS:BP: Ptr to MENU
34; Returns:
35; AL: Column (X)
36; AH: Row (Y)
37; Corrupts registers:
38; Nothing
39;--------------------------------------------------------------------
40MenuLocation_GetItemBordersTopLeftCoordinatesToAX:
41 xor ax, ax
42 jmp SHORT AddItemBordersTopLeftCoordinatesToAX
43
44ALIGN JUMP_ALIGN
45MenuLocation_GetTitleTextTopLeftCoordinatesToAX:
46 mov ax, (MENU_TEXT_ROW_OFFSET<<8) | MENU_TEXT_COLUMN_OFFSET
47 SKIP2B f ; cmp ax, <next instruction>
48MenuLocation_GetTitleBordersTopLeftCoordinatesToAX:
49 xor ax, ax
50 jmp SHORT MenuLocation_AddTitleBordersTopLeftCoordinatesToAX
51
52ALIGN JUMP_ALIGN
53MenuLocation_GetInformationTextTopLeftCoordinatesToAX:
54 mov ax, (MENU_TEXT_ROW_OFFSET<<8) | MENU_TEXT_COLUMN_OFFSET
55 jmp SHORT AddInformationBordersTopLeftCoordinatesToAX
56
57ALIGN JUMP_ALIGN
58MenuLocation_GetBottomBordersTopLeftCoordinatesToAX:
59 xor ax, ax
60 ; Fall to .AddBottomBordersTopLeftCoordinatesToAX
61
62;--------------------------------------------------------------------
63; .AddBottomBordersTopLeftCoordinatesToAX
64; AddInformationBordersTopLeftCoordinatesToAX
65; AddItemBordersTopLeftCoordinatesToAX
66; MenuLocation_AddTitleBordersTopLeftCoordinatesToAX
67; Parameters
68; AX: Zero of offset
69; SS:BP: Ptr to MENU
70; Returns:
71; AL: Column (X)
72; AH: Row (Y)
73; Corrupts registers:
74; Nothing
75;--------------------------------------------------------------------
76.AddBottomBordersTopLeftCoordinatesToAX:
77 stc ; Compensate for Information top border
78 adc ah, [bp+MENUINIT.bInfoLines]
79ALIGN JUMP_ALIGN
80AddInformationBordersTopLeftCoordinatesToAX:
81 push cx
82 call MenuScrollbars_GetMaxVisibleItemsOnPageToCX
83 inc cx ; Compensate for Items top border
84 add ah, cl
85 pop cx
86ALIGN JUMP_ALIGN
87AddItemBordersTopLeftCoordinatesToAX:
88 stc ; Compensate for Title top border
89 adc ah, [bp+MENUINIT.bTitleLines]
90ALIGN JUMP_ALIGN
91MenuLocation_AddTitleBordersTopLeftCoordinatesToAX:
92 push di
93 push ax
94 CALL_DISPLAY_LIBRARY GetColumnsToALandRowsToAH
95 sub al, [bp+MENUINIT.bWidth]
96 sub ah, [bp+MENUINIT.bHeight]
97 shr al, 1
98 shr ah, 1
99 pop di ; Old AX to DI
100 add ax, di ; Add old AX to menu top left coordinates
101 pop di
102 ret
103
104
105;--------------------------------------------------------------------
106; MenuLocation_GetMaxTextLineLengthToAX
107; Parameters
108; SS:BP: Ptr to MENU
109; Returns:
110; AX: Maximum text line length in characters
111; Corrupts registers:
112; Nothing
113;--------------------------------------------------------------------
114ALIGN JUMP_ALIGN
115MenuLocation_GetMaxTextLineLengthToAX:
116 eMOVZX ax, BYTE [bp+MENUINIT.bWidth]
117 sub ax, BYTE MENU_HORIZONTAL_BORDER_LINES + MENU_TEXT_COLUMN_OFFSET
118 ret
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