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source: xtideuniversalbios/trunk/Assembly_Library/Src/Display/DisplayPrint.asm@ 350

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Last change on this file since 350 was 341, checked in by krille_n_@…, 12 years ago

Changes:

Fixed a bug from r323 in DisplayPrint.asm.
Removed some unused code from XTIDECFG (undoing the change to Math.asm in r336 as part of it).

File size: 11.5 KB

Rev	Line
[41]	1	; Project name : Assembly Library
	2	; Description : Functions for display output.
	3
	4	; Section containing code
	5	SECTION .text
	6
[223]	7
[41]	8	;--------------------------------------------------------------------
	9	; Supports following formatting types:
	10	; %a Specifies attribute for next character
	11	; %A Specifies attribute for remaining string (or until next %A)
	12	; %d Prints signed 16-bit decimal integer
	13	; %u Prints unsigned 16-bit decimal integer
	14	; %x Prints 16-bit hexadecimal integer
	15	; %s Prints string (from CS segment)
	16	; %S Prints string (far pointer)
	17	; %c Prints character
	18	; %t Prints character number of times (character needs to be pushed first, then repeat times)
	19	; %% Prints '%' character (no parameter pushed)
	20	;
	21	; Any placeholder can be set to minimum length by specifying
	22	; minimum number of characters. For example %8d would append spaces
	23	; after integer so that at least 8 characters would be printed.
[48]	24	;
	25	; When placing '-' after number, then spaces will be used for prepending.
	26	; For example %8-d would prepend integer with spaces so that at least
	27	; 8 characters would be printed.
[162]	28	;
[41]	29	; DisplayPrint_FormattedNullTerminatedStringFromCSSI
	30	; Parameters:
	31	; BP: SP before pushing parameters
	32	; DS: BDA segment (zero)
	33	; CS:SI: Pointer to string to format
	34	; ES:DI: Ptr to cursor location in video RAM
	35	; Stack: Parameters for formatting placeholders.
	36	; Parameter for first placeholder must be pushed first.
	37	; Low word must pushed first for placeholders requiring
	38	; 32-bit parameters (two words).
	39	; Returns:
	40	; DI: Updated offset to video RAM
	41	; Corrupts registers:
	42	; AX, DX
	43	;--------------------------------------------------------------------
	44	ALIGN JUMP_ALIGN
	45	DisplayPrint_FormattedNullTerminatedStringFromCSSI:
	46	push bp
	47	push si
	48	push cx
	49	push bx
	50	push WORD [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.bAttribute]
	51
	52	dec bp ; Point BP to...
	53	dec bp ; ...first stack parameter
	54	call DisplayFormat_ParseCharacters
	55
	56	; Pop original character attribute
	57	pop ax
	58	mov [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.bAttribute], al
	59
	60	pop bx
	61	pop cx
	62	pop si
	63	pop bp
[186]	64
[41]	65	ret
	66
	67
	68	;--------------------------------------------------------------------
[44]	69	; DisplayPrint_SignedWordFromAXWithBaseInBX
[41]	70	; Parameters:
	71	; AX: Word to display
[44]	72	; BX: Integer base (binary=2, octal=8, decimal=10, hexadecimal=16)
[41]	73	; DS: BDA segment (zero)
	74	; ES:DI: Ptr to cursor location in video RAM
	75	; Returns:
	76	; DI: Updated offset to video RAM
	77	; Corrupts registers:
	78	; AX, DX
	79	;--------------------------------------------------------------------
[134]	80	%ifndef EXCLUDE_FROM_XTIDE_UNIVERSAL_BIOS
[41]	81	ALIGN JUMP_ALIGN
[44]	82	DisplayPrint_SignedWordFromAXWithBaseInBX:
	83	test ax, ax
	84	jns SHORT DisplayPrint_WordFromAXWithBaseInBX
[41]	85
	86	push ax
	87	mov al, '-'
	88	call DisplayPrint_CharacterFromAL
	89	pop ax
	90	neg ax
[44]	91	; Fall to DisplayPrint_WordFromAXWithBaseInBX
[134]	92	%endif
[41]	93
[323]	94
	95	%ifndef MODULE_STRINGS_COMPRESSED
[41]	96	;--------------------------------------------------------------------
	97	; DisplayPrint_WordFromAXWithBaseInBX
	98	; Parameters:
	99	; AX: Word to display
	100	; BX: Integer base (binary=2, octal=8, decimal=10, hexadecimal=16)
	101	; DS: BDA segment (zero)
	102	; ES:DI: Ptr to cursor location in video RAM
	103	; Returns:
	104	; DI: Updated offset to video RAM
	105	; Corrupts registers:
	106	; AX, DX
[323]	107	;--------------------------------------------------------------------
[41]	108	ALIGN JUMP_ALIGN
	109	DisplayPrint_WordFromAXWithBaseInBX:
	110	push cx
[44]	111	push bx
[41]	112
	113	xor cx, cx
	114	ALIGN JUMP_ALIGN
	115	.DivideLoop:
	116	xor dx, dx ; DX:AX now holds the integer
	117	div bx ; Divide DX:AX by base
	118	push dx ; Push remainder
	119	inc cx ; Increment character count
	120	test ax, ax ; All divided?
	121	jnz SHORT .DivideLoop ; If not, loop
[44]	122
[323]	123	PrintAllPushedDigits:
	124	mov bx, g_rgcDigitToCharacter
[41]	125	ALIGN JUMP_ALIGN
[44]	126	.PrintNextDigit:
	127	pop ax ; Pop digit
[223]	128	cs xlatb
[41]	129	call DisplayPrint_CharacterFromAL
[44]	130	loop .PrintNextDigit
[41]	131
[44]	132	pop bx
[41]	133	pop cx
	134	ret
[341]	135
[323]	136	g_rgcDigitToCharacter: db "0123456789ABCDEF"
[341]	137
	138	;--------------------------------------------------------------------
	139	; DisplayPrint_QWordFromSSBPwithBaseInBX
	140	; Parameters:
	141	; SS:BP: QWord to display
	142	; BX: Integer base (binary=2, octal=8, decimal=10, hexadecimal=16)
	143	; DS: BDA segment (zero)
	144	; ES:DI: Ptr to cursor location in video RAM
	145	; Returns:
	146	; DI: Updated offset to video RAM
	147	; Corrupts registers:
	148	; AX, DX, [SS:BP]
	149	;--------------------------------------------------------------------
	150	%ifndef EXCLUDE_FROM_XTIDECFG ; Not used in XTIDECFG
	151	ALIGN JUMP_ALIGN
	152	DisplayPrint_QWordFromSSBPwithBaseInBX:
	153	push cx
	154	push bx
	155
	156	mov cx, bx ; CX = Integer base
	157	xor bx, bx ; BX = Character count
	158	ALIGN JUMP_ALIGN
	159	.DivideLoop:
	160	call Math_DivQWatSSBPbyCX; Divide by base
	161	push dx ; Push remainder
	162	inc bx ; Increment character count
	163	cmp WORD [bp], BYTE 0 ; All divided?
	164	jne SHORT .DivideLoop ; If not, loop
	165	mov cx, bx ; Character count to CX
	166	jmp SHORT PrintAllPushedDigits
	167	%endif ; EXCLUDE_FROM_XTIDECFG
[186]	168
	169	%endif ; MODULE_STRINGS_COMPRESSED
[41]	170
	171
	172	;--------------------------------------------------------------------
	173	; DisplayPrint_CharacterBufferFromBXSIwithLengthInCX
	174	; Parameters:
	175	; CX: Buffer length (characters)
	176	; BX:SI: Ptr to NULL terminated string
	177	; DS: BDA segment (zero)
	178	; ES:DI: Ptr to cursor location in video RAM
	179	; Returns:
	180	; DI: Updated offset to video RAM
	181	; Corrupts registers:
	182	; AX, DX
	183	;--------------------------------------------------------------------
[223]	184	%ifndef EXCLUDE_FROM_XTIDE_UNIVERSAL_BIOS
[41]	185	ALIGN JUMP_ALIGN
	186	DisplayPrint_CharacterBufferFromBXSIwithLengthInCX:
[44]	187	jcxz .NothingToPrintSinceZeroLength
	188	push si
[41]	189	push cx
	190
	191	ALIGN JUMP_ALIGN
[44]	192	.PrintNextCharacter:
	193	mov ds, bx
	194	lodsb
	195	LOAD_BDA_SEGMENT_TO ds, dx
	196	call DisplayPrint_CharacterFromAL
	197	loop .PrintNextCharacter
	198
[41]	199	pop cx
[44]	200	pop si
	201	.NothingToPrintSinceZeroLength:
[41]	202	ret
[194]	203	%endif
[41]	204
[186]	205
[41]	206	;--------------------------------------------------------------------
[67]	207	; DisplayPrint_ClearScreenWithCharInALandAttributeInAH
[41]	208	; Parameters:
[67]	209	; AL: Character to clear with
	210	; AH: Attribute to clear with
[41]	211	; DS: BDA segment (zero)
	212	; ES:DI: Ptr to cursor location in video RAM
	213	; Returns:
	214	; Nothing
	215	; Corrupts registers:
	216	; AX, DX
	217	;--------------------------------------------------------------------
	218	ALIGN JUMP_ALIGN
[67]	219	DisplayPrint_ClearScreenWithCharInALandAttributeInAH:
[41]	220	push di
[67]	221	push cx
	222
	223	xchg cx, ax
[41]	224	xor ax, ax
[67]	225	call DisplayCursor_SetCoordinatesFromAX ; Updates DI
[41]	226	call DisplayPage_GetColumnsToALandRowsToAH
[67]	227	mul ah ; AX = AL*AH = Characters on screen
	228	xchg cx, ax ; AX = Char+Attr, CX = WORDs to store
	229	rep stosw
	230
	231	pop cx
[41]	232	pop di
	233	mov [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.fpCursorPosition], di
	234	ret
	235
	236
	237	;--------------------------------------------------------------------
	238	; DisplayPrint_ClearAreaWithHeightInAHandWidthInAL
	239	; Parameters:
	240	; AH: Area height
	241	; AL: Area width
	242	; DS: BDA segment (zero)
	243	; ES:DI: Ptr to cursor location in video RAM
	244	; Returns:
[42]	245	; DI: Updated offset to video RAM
[41]	246	; Corrupts registers:
	247	; AX, DX
	248	;--------------------------------------------------------------------
[134]	249	%ifndef EXCLUDE_FROM_XTIDE_UNIVERSAL_BIOS
[41]	250	ALIGN JUMP_ALIGN
	251	DisplayPrint_ClearAreaWithHeightInAHandWidthInAL:
[42]	252	push si
[41]	253	push cx
	254	push bx
	255
[42]	256	xchg bx, ax ; Area size to BX
[41]	257	call DisplayCursor_GetSoftwareCoordinatesToAX
[42]	258	xchg si, ax ; Software (Y,X) coordinates now in SI
	259	xor cx, cx
[41]	260
	261	ALIGN JUMP_ALIGN
[42]	262	.ClearRowLoop:
	263	mov cl, bl ; Area width now in CX
[44]	264	mov al, SCREEN_BACKGROUND_CHARACTER
[42]	265	call DisplayPrint_RepeatCharacterFromALwithCountInCX
[41]	266
[42]	267	xchg ax, si ; Coordinates to AX
	268	inc ah ; Increment row
	269	mov si, ax
[41]	270	call DisplayCursor_SetCoordinatesFromAX
[42]	271	dec bh ; Decrement rows left
	272	jnz SHORT .ClearRowLoop
[41]	273
	274	pop bx
	275	pop cx
[42]	276	pop si
[41]	277	ret
[134]	278	%endif
[42]	279
	280
	281	;--------------------------------------------------------------------
	282	; DisplayPrint_RepeatCharacterFromALwithCountInCX
	283	; Parameters:
	284	; AL: Character to display
	285	; CX: Repeat count
	286	; DS: BDA segment (zero)
	287	; ES:DI: Ptr to cursor location in video RAM
	288	; Returns:
	289	; DI: Updated offset to video RAM
	290	; Corrupts registers:
[181]	291	; DX
[42]	292	;--------------------------------------------------------------------
	293	ALIGN JUMP_ALIGN
	294	DisplayPrint_RepeatCharacterFromALwithCountInCX:
[44]	295	jcxz .NothingToRepeat
	296	push cx
	297
	298	ALIGN JUMP_ALIGN
	299	.RepeatCharacter:
[42]	300	push ax
	301	call DisplayPrint_CharacterFromAL
	302	pop ax
[44]	303	loop .RepeatCharacter
	304
	305	pop cx
	306	.NothingToRepeat:
[42]	307	ret
[223]	308
[186]	309
	310	;--------------------------------------------------------------------
	311	; DisplayPrint_NullTerminatedStringFromCSSI
	312	; Parameters:
	313	; CS:SI: Ptr to NULL terminated string
	314	; DS: BDA segment (zero)
	315	; ES:DI: Ptr to cursor location in video RAM
	316	; Returns:
	317	; DI: Updated offset to video RAM
	318	; Corrupts registers:
	319	; AX, DX
	320	;--------------------------------------------------------------------
	321	%ifndef MODULE_STRINGS_COMPRESSED
	322	;;;
	323	;;; Take care when using this routine with compressed strings (which is why it is disabled).
	324	;;; All strings in CSSI should go through the DisplayFormatCompressed code to be decoded.
[223]	325	;;;
[186]	326	ALIGN JUMP_ALIGN
	327	DisplayPrint_NullTerminatedStringFromCSSI:
	328	push bx
	329	mov bx, cs
	330	call DisplayPrint_NullTerminatedStringFromBXSI
	331	pop bx
	332	ret
	333	%endif
[42]	334
	335
[186]	336	;;;
	337	;;; Note that the following routines need to be at the bottom of this file
	338	;;; to accomodate short jumps from the next file (DisplayFormat/DisplayFormatCompressed)
[223]	339	;;;
[186]	340
[42]	341	;--------------------------------------------------------------------
[44]	342	; DisplayPrint_Newline
	343	; Parameters:
	344	; DS: BDA segment (zero)
	345	; ES:DI: Ptr to cursor location in video RAM
	346	; Returns:
	347	; DI: Updated offset to video RAM
	348	; Corrupts registers:
	349	; AX, DX
	350	;--------------------------------------------------------------------
[186]	351	%ifdef MODULE_STRINGS_COMPRESSED
[44]	352	ALIGN JUMP_ALIGN
[186]	353	DisplayPrint_Newline_FormatAdjustBP:
[223]	354	inc bp ; we didn't need a parameter after all, readjust BP
[186]	355	inc bp
[194]	356	; fall through to DisplayPrint_Newline
[186]	357	%endif
	358
[223]	359	ALIGN JUMP_ALIGN
[44]	360	DisplayPrint_Newline:
[52]	361	mov al, LF
	362	call DisplayPrint_CharacterFromAL
[44]	363	mov al, CR
	364	; Fall to DisplayPrint_CharacterFromAL
	365
	366	;--------------------------------------------------------------------
[42]	367	; DisplayPrint_CharacterFromAL
	368	; Parameters:
	369	; AL: Character to display
[186]	370	; Zero value is ignored (no characer is printed)
[42]	371	; DS: BDA segment (zero)
	372	; ES:DI: Ptr to cursor location in video RAM
	373	; Returns:
	374	; DI: Updated offset to video RAM
	375	; Corrupts registers:
	376	; AX, DX
	377	;--------------------------------------------------------------------
	378	ALIGN JUMP_ALIGN
	379	DisplayPrint_CharacterFromAL:
[186]	380	test al,al
	381	jz DisplayPrint_Ret
[241]	382
[42]	383	mov ah, [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.bAttribute]
	384	jmp [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.fnCharOut]
[186]	385
[223]	386
[186]	387	;--------------------------------------------------------------------
	388	; DisplayPrint_NullTerminatedStringFromBXSI
	389	; Parameters:
	390	; DS: BDA segment (zero)
	391	; BX:SI: Ptr to NULL terminated string
	392	; ES:DI: Ptr to cursor location in video RAM
	393	; Returns:
	394	; DI: Updated offset to video RAM
	395	; Corrupts registers:
	396	; AX, DX
	397	;--------------------------------------------------------------------
	398	ALIGN JUMP_ALIGN
	399	DisplayPrint_NullTerminatedStringFromBXSI:
	400	push si
	401	push cx
	402
	403	xor cx, cx
	404	ALIGN JUMP_ALIGN
	405	.PrintNextCharacter:
	406	mov ds, bx ; String segment to DS
	407	lodsb
	408	mov ds, cx ; BDA segment to DS
	409	test al, al ; NULL?
	410	jz SHORT .EndOfString
	411	call DisplayPrint_CharacterFromAL
	412	jmp SHORT .PrintNextCharacter
	413
	414	ALIGN JUMP_ALIGN
	415	.EndOfString:
	416	pop cx
	417	pop si
[223]	418
	419	DisplayPrint_Ret: ; random ret to jump to
[186]	420	ret
	421

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