source: xtideuniversalbios/trunk/Assembly_Library/Src/Display/Display.asm

; Project name  :   Assembly Library
; Description   :   Display Library functions for CALL_DISPLAY_LIBRARY macro
;                   that users should use to make library call.

;
; XTIDE Universal BIOS and Associated Tools
; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team.
;
; This program is free software; you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation; either version 2 of the License, or
; (at your option) any later version.
;
; This program is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
; GNU General Public License for more details.
; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
;

; Section containing code
SECTION .text

;--------------------------------------------------------------------
; DisplayFunctionFromDI
;   Parameters:
;       DI:     Function to call (DISPLAY_LIB.functionName)
;       Others: Depends on function to call (DX cannot be parameter)
;   Returns:
;       Depends on function to call
;   Corrupts registers:
;       AX (unless used as a return register), DI
;--------------------------------------------------------------------
ALIGN DISPLAY_JUMP_ALIGN
Display_FunctionFromDI:
    push    es
    push    ds
    push    dx

%ifdef CLD_NEEDED
    cld
%endif
    LOAD_BDA_SEGMENT_TO ds, dx
    mov     dx, di
    les     di, [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.fpCursorPosition]
    call    dx
    mov     [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.fpCursorPosition], di

    pop     dx
    pop     ds
    pop     es
    ret

;--------------------------------------------------------------------
; Display_FormatNullTerminatedStringFromCSSI
;   Parameters:
;       Same as DisplayPrint_FormattedNullTerminatedStringFromCSSI
;   Returns:
;       Stack variables will be cleaned
;   Corrupts registers:
;       AX
;--------------------------------------------------------------------
ALIGN DISPLAY_JUMP_ALIGN
Display_FormatNullTerminatedStringFromCSSI:
    pop     ax                  ; Discard return address to inside Display_FunctionFromDI
    call    DisplayPrint_FormattedNullTerminatedStringFromCSSI
    mov     [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.fpCursorPosition], di

    pop     dx
    pop     ds
    pop     es

    pop     ax                  ; Pop return address
    mov     sp, bp              ; Clean stack variables
    jmp     ax


    %define InitializeDisplayContext                        DisplayContext_Initialize

%ifndef EXCLUDE_FROM_XUB
    %define SetCharacterPointerFromBXAX                     DisplayContext_SetCharacterPointerFromBXAX
%endif
    %define SetCharOutputFunctionFromAXwithAttribFlagInBL   DisplayContext_SetCharOutputFunctionFromAXwithAttribFlagInBL
    %define SetCharacterOutputParameterFromAX               DisplayContext_SetCharacterOutputParameterFromAX
    %define SetCharacterAttributeFromAL                     DisplayContext_SetCharacterAttributeFromAL
    %define SetCursorShapeFromAX                            DisplayCursor_SetShapeFromAX
    %define SetCursorCoordinatesFromAX                      DisplayCursor_SetCoordinatesFromAX
%ifndef EXCLUDE_FROM_XTIDECFG
    %define SetNewPageFromAL                                DisplayPage_SetFromAL
%endif
    %define SynchronizeDisplayContextToHardware             DisplayContext_SynchronizeToHardware

%ifndef EXCLUDE_FROM_XUB
    %define GetCharacterPointerToBXAX                       DisplayContext_GetCharacterPointerToBXAX
%endif
    %define GetSoftwareCoordinatesToAX                      DisplayCursor_GetSoftwareCoordinatesToAX
    %define GetColumnsToALandRowsToAH                       DisplayPage_GetColumnsToALandRowsToAH

    %define FormatNullTerminatedStringFromCSSI              Display_FormatNullTerminatedStringFromCSSI
%ifndef EXCLUDE_FROM_XUB
    %define PrintSignedWordFromAXWithBaseInBL               DisplayPrint_SignedWordFromAXWithBaseInBL
%endif
    %define PrintWordFromAXWithBaseInBL                     DisplayPrint_WordFromAXWithBaseInBL
%ifndef EXCLUDE_FROM_XUB OR EXCLUDE_FROM_XTIDECFG
    %define PrintQWordFromSSBPwithBaseInBX                  DisplayPrint_QWordFromSSBPwithBaseInBX
%endif
    %define PrintCharBufferFromBXSIwithLengthInCX           DisplayPrint_CharacterBufferFromBXSIwithLengthInCX
    %define PrintNullTerminatedStringFromBXSI               DisplayPrint_NullTerminatedStringFromBXSI
    %define PrintNullTerminatedStringFromCSSI               DisplayPrint_NullTerminatedStringFromCSSI
    %define PrintRepeatedCharacterFromALwithCountInCX       DisplayPrint_RepeatCharacterFromALwithCountInCX
    %define PrintCharacterFromAL                            DisplayPrint_CharacterFromAL
    %define PrintNewlineCharacters                          DisplayPrint_Newline
%ifndef EXCLUDE_FROM_XUB
    %define ClearAreaWithHeightInAHandWidthInAL             DisplayPrint_ClearAreaWithHeightInAHandWidthInAL
%endif
    %define ClearScreenWithCharInALandAttrInAH              DisplayPrint_ClearScreenWithCharInALandAttributeInAH