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;/*; * Microsoft Confidential; * Copyright (C) Microsoft Corporation 1988 - 1991; * All Rights Reserved.; */;************************************************************;** ;** NAME: Support for HP PCL printers added to GRAPHICS.;** ;** DESCRIPTION: I modified the procedures STORE_BOX, PRINT_BUFFER,;** GET_SCREEN_INFO, DET_CUR_SCAN_LNE_LENGTH, and NEW_PRT_LINE;** as follows.;** ;** For STORE_BOX:;** if data_type = data_row, then store printbox in print buffer;** in row format - not column format.;** ;** For PRINT_BUFFER:;** if data_type = data_row, then print one byte at a time.;** ;** For GET_SCREEN_INFO:;** if data_type = data_row;** nb_boxes_per_prt_buf = 8/box_height;** if print_options = rotate;** nb_scan_lines = screen_width;** else;** nb_scan_lines = screen_height;** endif;** endif;** ;** For DET_CUR_SCAN_LNE_LENGTH:;** if data_type = data_row;** don't go down the columns to determine the scan_line_length;** endif;** ;** For NEW_PRT_LINE:;** Altered it so send escape number sequence, COUNT or LOWCOUNT and;** HIGHCOUNT, if they are specified before the new keyword DATA.;** ;** ;** I added the the procedures END_PRT_LINE and GET_COUNT, which;** are described below.;** ;** END_PRT_LINE sends escape number sequence, COUNT or LOWCOUNT and;** HIGHCOUNT, if they are specified after the new keyword DATA;** in the GRAPHICS statement of the profile. It also sends a;** CR & LF for IBM type printers if needed.;** ;** GET_COUNT gets the number of bytes that are going to be sent to the;** printer and converts the number to ASCII if DATA_TYPE = DATA_ROW.;** ;** BUG NOTES: The following bug was fixed for the pre-release ;** version Q.01.02.;** ;** BUG (mda003);** ------------;** ;** NAME: GRAPHICS prints a CR & LF after each scan line unless it is ;** loaded twice. ;** ;** FILES & PROCEDURES AFFECTED: GRLOAD3.ASM - PARSE_GRAPHICS;** GRCOMMON.ASM - END_PRT_LINE;** GRSHAR.STR - N/A;** ;** CAUSES: The local variables LOWCOUNT_FOUND, HIGHCOUNT_FOUND CR_FOUND and ;** LF_FOUND used for loading, were incorrectly being used as global ;** variables during printing.;** ;** FIX: Created a new variable Printer_Needs_CR_LF in GRSHAR.STR, which ;** is used to determine in GRCOMMON.ASM if it's necessary to ;** manually send a CR & LF to the printer at print time. The ;** variable is set at load time in GRLOAD3.ASM, if the variables ;** Data_Found and Build_State are set. ;** ;** DOCUMENTATION NOTES: This version of GRCOMMON.ASM differs from the previous;** version only in terms of documentation. ;** ;************************************************************ PAGE ,132 ;AN000;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;AN000;;; DOS - GRAPHICS Command;; ;; ;AN000;;; File Name: GRCOMMON.ASM ;AN000;;; ---------- ;AN000;;; ;AN000;;; Description: ;AN000;;; ------------ ;AN000;;; ;AN000;;; This file contains the modules common to the Print Screen ;AN000;;; process of GRAPHICS.COM. ;AN000;;; This file is included by both set of Print modules. ;AN000;;; ;AN000;;; This file MUST BE COMPILED WITH EACH SET OF MODULES since, ;AN000;;; one set is relocated in memory at installation time; all ;AN000;;; references to the common procedures must be resolved from ;AN000;;; within each set of print modules. ;AN000;;; ;AN000;;; The set of common modules is relocated in memory along with ;AN000;;; the selected set of print modules. ;AN000;;; ;AN000;;; Documentation Reference: ;AN000;;; ------------------------ ;AN000;;; OASIS High Level Design ;AN000;;; OASIS GRAPHICS I1 Overview ;AN000;;; ;AN000;;; Procedures Contained in This File: ;AN000;;; ---------------------------------- ;AN000;;; READ_DOT ;AN000;;; LOC_MODE_PRT_INFO ;AN000;;; STORE_BOX ;AN000;;; PRINT_BUFFER ;AN000;;; GET_SCREEN_INFO ;AN000;;; SETUP_PRT ;AN000;;; RESTORE_PRT ;AN000;;; NEW_PRT_LINE ;AN000;;; PRINT_BYTE ;AN000;;; DET_CUR_SCAN_LNE_LENGTH ;AN000;; \/ ~~mda(001) -----------------------------------------------------------------------;; Added the following procedures to support printers with horizontal;; printer heads, such as an HP PCL printers.;; GET_COUNT;; END_PRT_LINE; /\ ~~mda(001) -----------------------------------------------------------------------;; ;AN000;;; Include Files Required: ;AN000;;; ----------------------- ;AN000;;; ;AN000;;; External Procedure References: ;AN000;;; ------------------------------ ;AN000;;; FROM FILE GRCTRL.ASM: ;AN000;;; PRT_SCR - Main module for printing the screen. ;AN000;;; FROM FILE GRBWPRT.ASM: ;AN000;;; PRT_BW_APA - Main module for printing on BW printer. ;AN000;;; FROM FILE GRCOLPRT.ASM: ;AN000;;; PRINT_COLOR - Main module for printing on COLOR printer. ;AN000;;; ;AN000;;; Linkage Instructions: ;AN000;;; -------------------- ;AN000;;; ;AN000;;; This file is included by both GRBWPRT.ASM and GRCOLPRT.ASM and is ;AN000;;; compiled with each of them. However, only one copy is made resident. ;AN000;;; ;AN000;;; Change History: ;AN000;;; --------------- ;AN000;;; ;AN000;;; ;AN000;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;AN000; ;AN000;PAGE ;AN000;;===============================================================================;AN000;; ;AN000;; LOC_MODE_PRT_INFO: LOCATE DISPLAYMODE PRINTER INFO. FOR THE CURRENT ;AN000;; MODE ;AN000;; ;AN000;;-------------------------------------------------------------------------------;AN000;; ;AN000;; INPUT: BP = Offset of the shared data area ;AN000;; CUR_MODE = Current video mode ;AN000;; ;AN000;; OUTPUT: CUR_MODE_PTR = Absolute Offset of the ;AN000;; current DISPLAYMODE INFO record. ;AN000;; ;AN000;; ERROR_CODE = DISPLAYMODE_INFO_NOT_FOUND if not found. ;AN000;; ;AN000;; CALLED BY: PRINT_COLOR ;AN000;; PRINT_BW_APA ;AN000;; ;AN000;; ;AN000;;-------------------------------------------------------------------------------;AN000;; ;AN000;; DESCRIPTION: DISPLAYMODE_PTR is pointing to the first DISPLAYMODE ;AN000;; INFO record within the Shared Data Area. ;AN000;; ;AN000;; This (chained) list of DISPLAYMODE records is scanned until the record ;AN000;; for the current mode is found. ;AN000;; ;AN000;; Note: All pointers in the DISPLAYMODE records are relative to the beginning ;AN000;; of the shared data area. Therefore, we must add the offset of the ;AN000;; shared data area (in BP) in order to access the data these pointers ;AN000;; are referencing. ;AN000;; ;AN000;; The CUR_MODE_PTR is relative to the segment and references the ;AN000;; DISPLAYMODE record for the video mode currently set at print screen ;AN000;; time. ;AN000;; ;AN000;; LOGIC: ;AN000;; ;AN000;; FOUND := FALSE ;AN000;; DO UNTIL FOUND OR END_OF_LIST ;AN000;; Get a display mode information record ;AN000;; IF record.DISP_MODE = CUR_MODE ;AN000;; THEN FOUND := TRUE ;AN000;; ELSE ;AN000;; CUR_MODE_PTR := record.NEXT_DISP_MODE ;AN000;; ;AN000;; ;AN000; ;AN000;LOC_MODE_PRT_INFO PROC NEAR ;AN000; PUSH BX ;AN000; PUSH CX ;AN000; PUSH DX ;AN000; PUSH SI ;AN000; ;AN000; MOV BX,DS:[BP].DISPLAYMODE_PTR ; [BX] := Current DISPLAYMODE ;AN000; ADD BX,BP ; record ;AN000; MOV DL,CUR_MODE ; DL := Current mode ;AN000; ;AN000;SCAN_1_DISPLAYMODE_RECORD: ;AN000; MOV SI,[BX].DISP_MODE_LIST_PTR ; [SI] : First mode covered ;AN000; ADD SI,BP ; by this DISPLAYMODE record ;AN000; MOV CL,[BX].NUM_DISP_MODE ; Scan each mode in the list ;AN000; XOR CH,CH ;AN000;SCAN_LIST_OF_MODES: ;AN000; CMP CS:[SI],DL ; FOUND ? ;AN000; JE FOUND ;AN000; INC SI ; NO, get next mode in ;AN000; LOOP SCAN_LIST_OF_MODES ; DISPLAYMODE record ;AN000; ;AN000; CMP [BX].NEXT_DISP_MODE,-1 ; END OF DISPLAYMODE LIST ? ;AN000; JE NOT_FOUND ; Yes, this mode not supported ;AN000;NEXT_RECORD: ; No, ;AN000; MOV BX,[BX].NEXT_DISP_MODE ; [BX] := Next record ;AN000; ADD BX,BP ; ;AN000; JMP SHORT SCAN_1_DISPLAYMODE_RECORD ;AN000; ;AN000;FOUND: ; Found: ;AN000; MOV CUR_MODE_PTR,BX ; Update pointer to current ;AN000; JMP SHORT LOC_MODE_PRT_INFO_END ; DISPLAYMODE record. ;AN000; ;AN000;NOT_FOUND: ; Not found: ;AN000; MOV ERROR_CODE,DISPLAYMODE_INFO_NOT_FOUND ; Return error condition ;AN000; ;AN000;LOC_MODE_PRT_INFO_END: ;AN000; POP SI ;AN000; POP DX ;AN000; POP CX ;AN000; POP BX ;AN000; RET ;AN000;LOC_MODE_PRT_INFO ENDP ;AN000;PAGE ;AN000;;===============================================================================;AN000;; ;AN000;; STORE_BOX : STORE ONE BOX IN THE PRINT BUFFER. ;AN000;; ;AN000;;-------------------------------------------------------------------------------;AN000;; ;AN000;; INPUT: SI = OFFSET OF THE BOX TO BE PRINTED ;AN000;; BOX_W = BOX WIDTH IN BITS ;AN000;; BOX_H = BOX HEIGHT IN BITS ;AN000;; ;AN000;; OUTPUT: PRT_BUF = THE PRINT BUFFER ;AN000;; ;AN000;;-------------------------------------------------------------------------------;AN000;; ;AN000;; DESCRIPTION: The print buffer is first shifted left in order to make ;AN000;; room for the new box (Note: the MSB's are lost; they are assumed to ;AN000;; have been printed), then the box is inserted in the low-order bits of ;AN000;; the printer buffer. ;AN000;; ;AN000;PAGE ;AN000;; EXAMPLE ;AN000;; ------- ;AN000;; BEFORE: AFTER: ;AN000;; ;AN000;; BOX: 0 0 0 ;AN000;; 0 0 0 ;AN000;; 0 0 0 ;AN000;; 0 0 0 ;AN000;; 0 0 0 ;AN000;; 0 0 0 ;AN000;; b1 b2 b3 ;AN000;; b4 b5 b6 ;AN000;; ;AN000;; PRT_BUF: byte1 byte2 byte3 PRT_BUF: byte1 byte2 byte3 ;AN000;; 0 1 0 1 1 1 ;AN000;; 1 0 1 1 1 1 ;AN000;; 1 1 1 1 1 1 ;AN000;; 1 1 1 1 1 1 ;AN000;; 1 1 1 1 1 1 ;AN000;; 1 1 1 1 1 1 ;AN000;; 1 1 1 b1 b2 b3 ;AN000;; LSB --> 1 1 1 b4 b5 b6 ;AN000;; ;AN000;; ;AN000;; LOGIC: ;AN000;; ;AN000;; FOR each byte of the buffer (BOX_W) ;AN000;; BEGIN ;AN000;; Make room for the box to be inserted ;AN000;; Insert the box ;AN000;; END ;AN000;; ;AN000;STORE_BOX PROC NEAR ;AN000; PUSH BX ;AN000; PUSH CX ;AN000; PUSH DI ;AN000; ;AN000; MOV DI,OFFSET PRT_BUF ; DI := Offset of the Print buffer ;AN000; XOR BX,BX ; BX := Byte index number ;AN000;
; \/ ~~mda(001) -----------------------------------------------------------------------; Added the following modification to support printers with; vertical print heads, such as HP PCL printers. The code; as is does not work for these printers because the data; is being stored in the print buffer with the assumption; that the print head is vertical.; .IF <DS:[BP].DATA_TYPE EQ DATA_ROW> PUSH AX ; PUSH DX ; PUSH BP ; MOV CL,BOX_W ; Make room for the bits to be inserted. SHL BYTE PTR [BX][DI],CL ; MOV CL,DS:[BP].ROW_TO_EXTRACT ; CL determines which row we're extracting XOR BP,BP ; Point to first column. XOR DX,DX ; Clear counter XOR AX,AX ; Clear register ;EXTRACT_NEXT_BIT: ; ; SHL AH,1 ; Make room for next bit MOV AL,DS:[SI][BP] ; Read column SHR AL,CL ; Get bit from row we're extracting AND AL,1 ; Isolate bit we got from row we're extracting OR AH,AL ; Place it in AH INC BP ; Advance to next column INC DL ; Inc. counter CMP DL,BOX_W ; Check if have more bits to extract from the row JL EXTRACT_NEXT_BIT; We do OR DS:[DI][BX],AH ; We don't so place the row we extracted in the ; print buffer. POP BP ; POP DX ; POP AX ; .ELSE ;; /\ ~~mda(001) ----------------------------------------------------------------------- ;AN000; MOV CL,BOX_H ; CL := Number of BITS to be shifted ;AN000;; FOR each column (byte) of the box to be stored in the buffer: ;AN000;STORE_1_BYTE: ;AN000; SHL BYTE PTR [BX][DI],CL ; Make room for the bits to be inserted ;AN000; MOV CH,[BX][SI] ; CH := column of the box to be inserted;AN000; OR [BX][DI],CH ; Insert the box column in the buffer ;AN000; INC BL ; Get next column (byte) of the box ;AN000; CMP BL,BOX_W ; All columns (bytes) of box stored ? ;AN000; JL STORE_1_BYTE ; No, store next one. ;AN000; .ENDIF ; ~~mda(001) Close the IF stmt ;AN000;STORE_BOX_END: ;AN000; POP DI ;AN000; POP CX ;AN000; POP BX ;AN000; RET ;AN000;STORE_BOX ENDP ;AN000;PAGE ;AN000;;===============================================================================;AN000;; ;AN000;; PRINT_BUFFER : PRINT THE BUFFER ;AN000;; ;AN000;;-------------------------------------------------------------------------------;AN000;; ;AN000;; INPUT: PRT_BUF = BYTES TO BE PRINTED ;AN000;; BOW_W = BOX WIDTH ;AN000;; ;AN000;; OUTPUT: PRINTER ;AN000;; ;AN000;;-------------------------------------------------------------------------------;AN000;; ;AN000;; DESCRIPTION: Prints BOX_W bytes. ;AN000;; ;AN000;; LOGIC: ;AN000;; ;AN000;; DO for each column in one pattern ;AN000;; BEGIN ;AN000;; Print one byte from the buffer ;AN000;; END ;AN000;; ;AN000;PRINT_BUFFER PROC NEAR ;AN000; PUSH AX ;AN000; PUSH BX ;AN000; PUSH CX ;AN000; ;AN000; MOV BX,OFFSET PRT_BUF ;AN000;; \/ ~~mda(001) -----------------------------------------------------------------------; If DATA_TYPE = DATA_ROW then the most we store in the print; buffer at one time is one byte..IF <DS:[BP].DATA_TYPE EQ DATA_ROW> ; MOV AL,[BX] ; Print one byte CALL PRINT_BYTE ; JC PRINT_BUFFER_END ; If printer error, quit the loop .ELSE; /\ ~~mda(001) ----------------------------------------------------------------------- XOR CX,CX ;AN000; MOV CL,BOX_W ;AN000;PRINT_1_BUF_COLUMN: ;AN000; MOV AL,[BX] ; Print one byte ;AN000; CALL PRINT_BYTE ;AN000; JC PRINT_BUFFER_END; If printer error, quit the loop ;AN000; INC BX ; Get next byte ;AN000; LOOP PRINT_1_BUF_COLUMN ;AN000;.ENDIF ;~~mda(001) close IF stmtPRINT_BUFFER_END: ;AN000; POP CX ;AN000; POP BX ;AN000; POP AX ;AN000; RET ;AN000;PRINT_BUFFER ENDP ;AN000;PAGE ;AN000;;===============================================================================;AN000;; ;AN000;; GET_SCREEN_INFO : GET INFORMATION ABOUT HOW TO READ THE SCREEN. ;AN000;; ;AN000;;-------------------------------------------------------------------------------;AN000;; ;AN000;; INPUT: SCREEN_HEIGHT = Number of pixel rows on the screen ;AN000;; SCREEN_WIDTH = Number of pixel columns on screen ;AN000;; CUR_MODE_PTR = Offset of the current DISPLAYMODE info rec. ;AN000;; ;AN000;; OUTPUT: PRINTER ;AN000;; SCAN_LINE_MAX_LENGTH = Maximum length of Screen scan line. ;AN000;; NB_SCAN_LINES = Number of SCAN LINES on the screen ;AN000;; CUR_ROW,CUR_COLUMN = Coordinates of the first pixel to be ;AN000;; read on the screen ;AN000;; NB_BOXES_PER_PRT_BUF = Number of boxes fitting in the Print ;AN000;; buffer ;AN000;; ;AN000;; CALLED BY: PRINT_COLOR ;AN000;; PRT_BW_APA ;AN000;; ;AN000;;-------------------------------------------------------------------------------;AN000;; ;AN000;; DESCRIPTION: ;AN000;; ;AN000;; 1) Determine where to start reading the screen. ;AN000;; For non-rotated printing, it should start with the top-left ;AN000;; corner pixel. ;AN000;; For rotated printing, it should start with the low-left corner ;AN000;; pixel. ;AN000;; ;AN000;; 2) Determine the length of a scan line. ;AN000;; For non-rotated printing, it is the WIDTH of the screen. ;AN000;; For rotated printing, it is the HEIGHT of the screen. ;AN000;; ;AN000;; 3) Determine the number of scan lines on the screen. ;AN000;; For non-rotated printing, it is the HEIGHT of the screen divided ;AN000;; by the number of boxes fitting in the print buffer. ;AN000;; For rotated printing, it is the WIDTH of the screen divided by ;AN000;; the number of boxes fitting in the print buffer. ;AN000;; ;AN000;; LOGIC: ;AN000;; ;AN000;; CUR_COLUMN := 0 ;AN000;; IF printing is sideways ;AN000;; THEN ;AN000;; CUR_ROW := SCREEN_HEIGHT - 1 ; Low-left pixel ;AN000;; SCAN_LINE_MAX_LENGTH := SCREEN_HEIGHT ;AN000;; NB_SCAN_LINES := SCREEN_WIDTH / NB_BOXES_PER_PRT_BUF ;AN000;; ELSE ;AN000;; CUR_ROW := 0 ; Top-left pixel ;AN000;; SCAN_LINE_MAX_LENGTH := SCREEN_WIDTH ;AN000;; NB_SCAN_LINES := SCREEN_HEIGHT / NB_BOXES_PER_PRT_BUF ;AN000;; ;AN000;; ;AN000;GET_SCREEN_INFO PROC NEAR ;AN000; PUSH AX ;AN000; PUSH BX ; Used for DIV ;AN000; PUSH DX ; Used for DIV ;AN000; ;AN000; MOV BX,CUR_MODE_PTR ; BX := Offset DISPLAYMODE info record ;AN000;;-------------------------------------------------------------------------------;AN000;; ;AN000;; Calculate how many printer boxes fit in the print buffer: ;AN000;; ;AN000;;-------------------------------------------------------------------------------;AN000;; \/ ~~mda(001) -----------------------------------------------------------------------; The NB_BOXES_PER_PRT_BUF depends on if the printer head is; vertical, as in IBM's case, or if it's horizontal, as in; HP's case. If DATA_TYPE is DATA_COL, then we have a vertical; print head. If DATA_TYPE is DATA_ROW, then we have a ; horizontal print head. .IF <DS:[BP].DATA_TYPE EQ DATA_ROW> ; Print head is horizontal MOV AX,8 ; Num := 8 bits / Box width MOV DL,[BX].BOX_WIDTH ; DIV DL ; MOV NB_BOXES_PER_PRT_BUF,AL ; .ELSE ;; /\ ~~mda(001) ----------------------------------------------------------------------- MOV AX,8 ; Num := 8 bits / Box heigth ;AN000; MOV DL,[BX].BOX_HEIGHT ;AN000; DIV DL ;AN000; MOV NB_BOXES_PER_PRT_BUF,AL ;AN000; .ENDIF ; ~~mda(001) Close IF stmt.;-------------------------------------------------------------------------------;AN000;; ;AN000;; Determine where to start reading the screen: ;AN000;; ;AN000;;-------------------------------------------------------------------------------;AN000; MOV CUR_COLUMN,0 ; Reading always start from left of scr ;AN000;.IF <[BX].PRINT_OPTIONS EQ ROTATE> ;AN000;.THEN ;AN000;;-------------------------------------------------------------------------------;AN000;; ;AN000;; Printing is sideways; screen must be read starting in low-left corner. ;AN000;; ;AN000;;-------------------------------------------------------------------------------;AN000; MOV AX,SCREEN_HEIGHT ;AN000; MOV SCAN_LINE_MAX_LENGTH,AX ; Scan line length := screen height ;AN000; DEC AX ;AN000; MOV CUR_ROW,AX ; First row := screen height - 1 ;AN000; ;AN000;;-------Calculate the number of scan lines: ;AN000;; \/ ~~mda(001) -----------------------------------------------------------------------; The NB_SCAN_LINES depends on if the printer head is; vertical, as in IBM's case, or if it's horizontal, as in; HP's case. If the printer head is horizontal, then we can't; make use of the concept of scan lines. However, we can still; use the symbol NB_SCAN_LINES by just stuffing into it the; screen width.; .IF <DS:[BP].DATA_TYPE EQ DATA_ROW> ; Print head is horizontal MOV AX,SCREEN_WIDTH ; DX AX = Screen width CWD ; MOV NB_SCAN_LINES,AX; .ELSE; /\ ~~mda(001) ----------------------------------------------------------------------- MOV AX,SCREEN_WIDTH ; DX AX = Screen width ;AN000; CWD ; ;AN000; XOR BX,BX ; BX = Number of boxes per print buf ;AN000; MOV BL,NB_BOXES_PER_PRT_BUF ; ;AN000; DIV BX ; Screen width / number boxes per buff ;AN000; MOV NB_SCAN_LINES,AX ; Number of scan lines := result ;AN000; .ENDIF ; ~~mda(001) Close IF stmt.
.ELSE ;AN000;;-------------------------------------------------------------------------------;AN000;; ;AN000;; Printing is not sideways; screen must be read starting in top-left corner ;AN000;; ;AN000;;-------------------------------------------------------------------------------;AN000; MOV AX,SCREEN_WIDTH ;AN000; MOV SCAN_LINE_MAX_LENGTH,AX ; Scan line length := screen width ;AN000; MOV CUR_ROW,0 ; First row := 0 ;AN000; ;AN000;;-------Calculate the number of scan lines: ;AN000;; \/ ~~mda(001) -----------------------------------------------------------------------; The NB_SCAN_LINES depends on if the printer head is; vertical, as in IBM's case, or if it's horizontal, as in; HP's case. If the printer head is horizontal, then we can't; make use of the concept of scan lines. However, we can still; use the symbol NB_SCAN_LINES by just stuffing into it the; screen height.; .IF <DS:[BP].DATA_TYPE EQ DATA_ROW> ; Print head is vertical MOV AX,SCREEN_HEIGHT; DX AX = Screen height CWD ; MOV NB_SCAN_LINES,AX; .ELSE; /\ ~~mda(001) ----------------------------------------------------------------------- MOV AX,SCREEN_HEIGHT ; DX AX = Screen height ;AN000; CWD ; ;AN000; XOR BX,BX ; BX = Number of boxes per print buff ;AN000; MOV BL,NB_BOXES_PER_PRT_BUF ; ;AN000; DIV BX ; Screen height/number boxes per buff. ;AN000; MOV NB_SCAN_LINES,AX ; Number of scan lines := result ;AN000; .ENDIF ; ~~mda(001) Close IF stmt.
.ENDIF ;AN000; POP DX ;AN000; POP BX ;AN000; POP AX ;AN000; RET ;AN000;GET_SCREEN_INFO ENDP ;AN000;PAGE ;AN000;;===============================================================================;AN000;; ;AN000;; DET_CUR_SCAN_LNE_LENGTH : Determine where is the last non-blank "scan line ;AN000;; column" on the current scan line. ;AN000;; ;AN000;;-------------------------------------------------------------------------------;AN000;; ;AN000;; INPUT: CUR_ROW, ;AN000;; CUR_COLUMN = Coordinates of the top pixel of the current ;AN000;; scan line. ;AN000;; XLT_TAB = Color translation table ;AN000;; ;AN000;; OUTPUT: CUR_SCAN_LNE_LENGTH = Number of "columns" of pixels from the ;AN000;; beginning of the scan line up to ;AN000;; the last non-blank pixel. ;AN000;; ;AN000;; DATA SCREEN_WIDTH, ;AN000;; REFERENCED: SCREEN_HEIGHT = Dimensions of the screen in pels ;AN000;; SCAN_LINE_MAX_LENGTH= Maximum length of the scan line ;AN000;; ROTATE_SW = ON if printing is sideways ;AN000;; ;AN000;;-------------------------------------------------------------------------------;AN000;; ;AN000;; DESCRIPTION: Determine where is the last non-blank "column" by reading ;AN000;; the scan line backwards, one column at a time. ;AN000;; ;AN000;; ;AN000;; LOGIC: ;AN000;; ;AN000;; ; Obtain coordinates for the top pixel of the last column on the current ;AN000;; ; scan line: ;AN000;; IF printing is sideways ;AN000;; THEN ;AN000;; CUR_ROW := 0 ;AN000;; ELSE ;AN000;; CUR_COLUMN := SCREEN_WIDTH - 1 ;AN000;; ;AN000;; CUR_SCAN_LNE_LENGTH := SCAN_LINE_MAX_LENGTH ;AN000;; ; Read a column of pixels on the scan line until a non-blank is found: ;AN000;; For each column on the screen ;AN000;; CALL FILL_BUFF ;AN000;; ; Check if PRT_BUF is empty ;AN000;; IF buffer is empty ;AN000;; THEN DEC CUR_SCAN_LNE_LENGTH ;AN000;; ; Get next column ;AN000;; IF printing sideways THEN DEC CUR_ROW ;AN000;; ELSE DEC CUR_COLUMN ;AN000;; ELSE quit the loop ;AN000;; ;AN000;DET_CUR_SCAN_LNE_LENGTH PROC NEAR ;AN000; PUSH AX ;AN000; PUSH BX ;AN000; PUSH CX ;AN000; PUSH DX ;AN000; PUSH SI ;AN000; PUSH DI ;AN000; PUSH CUR_COLUMN ;AN000; PUSH CUR_ROW ;AN000; ;AN000; MOV BX,OFFSET XLT_TAB ; BX := Offset of XLT_TAB ;AN000;;-------------------------------------------------------------------------------;AN000;; ;AN000;; Obtain coordinates of the top pixel for the last column of the current ;AN000;; scan line: ;AN000;; ;AN000;;-------------------------------------------------------------------------------;AN000; .IF <ROTATE_SW EQ ON> ; If printing sideways ;AN000; .THEN ; then, ;AN000; MOV CUR_ROW,0 ; CUR_ROW := 0 ;AN000; .ELSE ; else, ;AN000; MOV CX,SCREEN_WIDTH ; CUR_COLUMN := SCREEN_WIDTH - 1 ;AN000; DEC CX ; ;AN000; MOV CUR_COLUMN,CX ; ;AN000; .ENDIF ;AN000;;-------------------------------------------------------------------------------;AN000;; ;AN000;; Read the scan line backwards "column" by "column" until a non-blank is found: ;AN000;; ;AN000;;-------------------------------------------------------------------------------;AN000; MOV CX,SCAN_LINE_MAX_LENGTH ; CX := current length ;AN000;; ;AN000;;-------For each "column" ;AN000;CHECK_1_COLUMN: ;AN000; MOV SI,CUR_ROW ; Save coordinates of the column ;AN000; MOV DI,CUR_COLUMN ; in SI, DI ;AN000; XOR DL,DL ; DL := Number of pixels verified in ;AN000; ; one "column" ;AN000;; ;AN000;;-------For each pixel within that "column" ;AN000;CHECK_1_PIXEL: ;AN000; CALL READ_DOT ; AL := Index into translation table ;AN000; XLAT XLT_TAB ; AL := Band mask or Intensity ;AN000; ;AN000;;-------Check if pixel will map to an empty box: ;AN000; .IF <DS:[BP].PRINTER_TYPE EQ BLACK_WHITE> ; If BLACK AND WHITE printer ;AN000; .THEN ; then, check for intensity of white ;AN000; CMP AL,WHITE_INT ; If curent pixel not blank ;AN000; JNE DET_LENGTH_END ; THEN, LEAVE THE LOOP ;AN000; .ELSE ; else, COLOR printer ;AN000; OR AL,AL ; IF Band mask not blank ;AN000; JNZ DET_LENGTH_END ; THEN, LEAVE THE LOOP ;AN000; .ENDIF ;AN000; ;AN000;; \/ ~~mda(001) -----------------------------------------------------------------------; Only if DATA_TYPE is DATA_COL do we have "columns",; so skip this section otherwise. .IF <DS:[BP].DATA_TYPE EQ DATA_COL> ; Print head is vertical; /\ ~~mda(001) ----------------------------------------------------------------------- ;-------All pixels so far on this "column" are blank, get next pixel: ;AN000; .IF <ROTATE_SW EQ ON> ; If printing sideways ;AN000; .THEN ; ;AN000; INC CUR_COLUMN ; then, increment column number ;AN000; .ELSE ; ;AN000; INC CUR_ROW ; else, increment row number ;AN000; .ENDIF ; ;AN000; INC DL ; One more pixel checked ;AN000; CMP DL,NB_BOXES_PER_PRT_BUF ; All pixels for that column done ? ;AN000; JL CHECK_1_PIXEL ; No, check next one. ;AN000; .ENDIF ;~~mda(001) Close IF stmt. ;AN000;;-------Nothing to print for this column, get next column ;AN000; .IF <ROTATE_SW EQ ON> ; If printing sideways ;AN000; .THEN ; then, ;AN000; MOV CUR_COLUMN,DI ; Restore column number ;AN000; INC CUR_ROW ; Get next row ;AN000; .ELSE ; else, ;AN000; MOV CUR_ROW,SI ; Restore row number ;AN000; DEC CUR_COLUMN ; Get next column ;AN000; .ENDIF ; ;AN000; LOOP CHECK_1_COLUMN ; CX (length) := CX - 1 ;AN000; ;AN000;DET_LENGTH_END: ;AN000; MOV CUR_SCAN_LNE_LENGTH,CX ; Get current length ;AN000; ;AN000; POP CUR_ROW ;AN000; POP CUR_COLUMN ;AN000; POP DI ;AN000; POP SI ;AN000; POP DX ;AN000; POP CX ;AN000; POP BX ;AN000; POP AX ;AN000; RET ;AN000;DET_CUR_SCAN_LNE_LENGTH ENDP ;AN000;PAGE ;AN000;;===============================================================================;AN000;; ;AN000;; SETUP_PRT : SET UP THE PRINTER FOR PRINTING IN GRAPHIC MODE ;AN000;; ;AN000;;-------------------------------------------------------------------------------;AN000;; ;AN000;; INPUT: CUR_MODE_PTR = Offset of the DISPLAYMODE information ;AN000;; record for the current mode ;AN000;; ;AN000;; OUTPUT: PRINTER ;AN000;; ;AN000;; CALLED BY: PRINT_COLOR ;AN000;; PRT_BW_APA ;AN000;; ;AN000;;-------------------------------------------------------------------------------;AN000;; ;AN000;; DESCRIPTION: Extract the SETUP escape sequence from the DISPLAYMODE ;AN000;; information record; Send this escape sequence to the printer. ;AN000;; ;AN000;; LOGIC: ;AN000;; ;AN000;; Number of bytes to print := CUR_MODE_PTR.NUM_SETUP_ESC ;AN000;; ;AN000;; Get the escape sequence: ;AN000;; SI := CUR_MODE_PTR.SETUP_ESC_PTR ;AN000;; ;AN000;; FOR each byte to be printed ;AN000;; PRINT_BYTE [SI] ; Send the byte to the printer ;AN000;; INC SI ; Get the next byte ;AN000;; ;AN000;SETUP_PRT PROC NEAR ;AN000; PUSH AX ;AN000; PUSH BX ;AN000; PUSH CX ;AN000; ;AN000; MOV BX,CUR_MODE_PTR ; BX := Displaymode info record. ;AN000; ;AN000; XOR CX,CX ; CX := Number of bytes to print ;AN000; MOV CL,[BX].NUM_SETUP_ESC ; ;AN000;.IF <CL G 0> ; If there is at least one ;AN000;.THEN ; byte to be printed: ;AN000; MOV BX,[BX].SETUP_ESC_PTR ; BX := Offset sequence to send ;AN000; ADD BX,BP ;AN000; ;AN000;SEND_1_SETUP_BYTE: ;AN000; MOV AL,[BX] ; AL := byte to print ;AN000; CALL PRINT_BYTE ; Send it to the printer ;AN000; JC SETUP_PRT_END ; If printer error, quit the loop ;AN000; INC BX ; Get next byte ;AN000; LOOP SEND_1_SETUP_BYTE ;AN000;.ENDIF ;AN000;SETUP_PRT_END: ;AN000; POP CX ;AN000; POP BX ;AN000; POP AX ;AN000; RET ;AN000;SETUP_PRT ENDP ;AN000;PAGE ;AN000;;===============================================================================;AN000;; ;AN000;; RESTORE_PRT : RESTORE THE PRINTER TO ITS INITIAL STATUS ;AN000;; ;AN000;;-------------------------------------------------------------------------------;AN000;; ;AN000;; INPUT: CUR_MODE_PTR = Offset of the DISPLAYMODE information ;AN000;; record for the current mode ;AN000;; ;AN000;; OUTPUT: PRINTER ;AN000;; ;AN000;; CALLED BY: PRINT_COLOR ;AN000;; PRT_BW_APA ;AN000;;-------------------------------------------------------------------------------;AN000;; ;AN000;; DESCRIPTION: Extract the RESTORE escape sequence from the DISPLAYMODE ;AN000;; information record; Send this escape sequence to the printer. ;AN000;; ;AN000;; LOGIC: ;AN000;; ;AN000;; Number of bytes to print := CUR_MODE_PTR.NUM_RESTORE_ESC ;AN000;; ;AN000;; Get the escape sequence: ;AN000;; SI := CUR_MODE_PTR.RESTORE_ESC_PTR ;AN000;; FOR each byte to be printed ;AN000;; PRINT_BYTE [SI] ; Send the byte to the printer ;AN000;; INC SI ; Get the next byte ;AN000;; ;AN000;RESTORE_PRT PROC NEAR ;AN000; PUSH AX ;AN000; PUSH BX ;AN000; PUSH CX ;AN000; ;AN000; MOV BX,CUR_MODE_PTR ; BX := Displaymode info record. ;AN000; ;AN000; XOR CX,CX ; CX := Number of bytes to print ;AN000; MOV CL,[BX].NUM_RESTORE_ESC ;AN000;.IF <CL G 0> ; If there is at least one ;AN000;.THEN ; byte to be printed: ;AN000; MOV BX,[BX].RESTORE_ESC_PTR ; BX := Offset sequence to send ;AN000; ADD BX,BP ;AN000; ;AN000;SEND_1_RESTORE_BYTE: ;AN000; MOV AL,[BX] ; AL := byte to print ;AN000; CALL PRINT_BYTE ; Send it to the printer ;AN000; JC RESTORE_PRT_END ; If printer error, quit the loop ;AN000; INC BX ; Get next byte ;AN000; LOOP SEND_1_RESTORE_BYTE ;AN000;.ENDIF ;AN000;RESTORE_PRT_END: ;AN000; POP CX ;AN000; POP BX ;AN000; POP AX ;AN000; RET ;AN000;RESTORE_PRT ENDP ;AN000;PAGE ;AN000;;===============================================================================;AN000;; ;AN000;; NEW_PRT_LINE : INITIALIZE THE PRINTER FOR A GRAPHIC LINE ;AN000;; ;AN000;;-------------------------------------------------------------------------------;AN000;; ;AN000;; INPUT: CUR_MODE_PTR = Offset of the DISPLAYMODE information ;AN000;; record for the current mode ;AN000;; CUR_SCAN_LNE_LENGTH = Number of bytes to send to the printer. ;AN000;; ;AN000;; OUTPUT: PRINTER ;AN000;; ;AN000;; CALLED BY: PRINT_BAND ;AN000;; PRT_BW_APA ;AN000;; ;AN000;;-------------------------------------------------------------------------------;AN000;; ;AN000;; DESCRIPTION: Extract the GRAPHICS escape sequence from the DISPLAYMODE ;AN000;; information record; Send this escape sequence to the printer. ;AN000;; Then, send the number of bytes that will follow. ;AN000;; ;AN000;; LOGIC: ;AN000;; ;AN000;; Number of bytes to print := CUR_MODE_PTR.NUM_GRAPHICS_ESC ;AN000;; ;AN000;; Get the escape sequence: ;AN000;; Set up the 2 bytes containing the number of bytes to send in this sequence. ;AN000;; SI := CUR_MODE_PTR.GRAPHICS_ESC_PTR ;AN000;; ;AN000;; FOR each byte to be printed ;AN000;; PRINT_BYTE [SI] ; Send the byte to the printer ;AN000;; INC SI ; Get the next byte ;AN000;; ;AN000;; Send the byte count ;AN000;; ;AN000; ;AN000;NEW_PRT_LINE PROC NEAR ;AN000; PUSH AX ;AN000; PUSH BX ;AN000; PUSH CX ;AN000; PUSH DX ;AN000; PUSH DI ;AN000; ;AN000; MOV BX,CUR_MODE_PTR ; BX := Displaymode info record. ;AN000; ;AN000;;-------------------------------------------------------------------------------;AN000;; Set up the 2 bytes containing the number of bytes to send in the GRAPHICS seq.;AN000;; NOTE: number of bytes to send is "CUR_SCAN_LNE_LENGTH * BOX_W" ;AN000;;-------------------------------------------------------------------------------;AN000; MOV AL,BOX_W ; cur_scan_lne_length * ;AN000; CBW ; printer box width = nb bytes to send;AN000; MUL CUR_SCAN_LNE_LENGTH ; (result in DX AX) ;AN000;;-------AX := Number of bytes to print ;AN000;
; \/ ~~mda(001) -----------------------------------------------------------------------; Since we have added the key words DATA and COUNT to the ; list of allowable words for the GRAPHICS statement; we have to take into consideration if the esc. sequence; numbers come before of after the word DATA. Also we have; to take into consideration if the printer is expecting; to receive the COUNT in binary form or in ASCII form.; Note this section of code replaces the section of code; which follows it. MOV DI,[BX].GRAPHICS_ESC_PTR ; DI := offset seq. to send XOR CX,CX ; CX := Length of the escape seq MOV CL,[BX].NUM_GRAPHICS_ESC ; before the word DATA .WHILE <CX NE 0> ; Doing while loop just in case DATA is the ; first word after GRAPHICS. In that case ; skip this and send the actual data. MOV BL,BYTE PTR DS:[BP+DI] ; Get code. ; .SELECT ; Case statement .WHEN <BL EQ ESC_NUM_CODE> ; We have an esc. number PUSH AX ; Save count INC DI ; Point to esc. number MOV AL,DS:[BP+DI] ; CALL PRINT_BYTE ; Send esc. number JC NEW_PRT_LINE_ENDP_1 ; If printer error then quit ; the loop and restore registers INC DI ; Point to next tag POP AX ; Restore the count DEC CX ; .WHEN <BL EQ COUNT_CODE> ; Need to send count in ascii form PUSH AX ; Save count PUSH SI ; CALL GET_COUNT ; Get # bytes to send to printer PUSH CX ; Save counter for outside loop XOR CH,CH ; MOV CL,DS:[BP].NUM_BYTES_FOR_COUNT ; LEA SI,DS:[BP].COUNT ; Get ptr. to count SUB SI,CX ; Need to send MSB first INC SI ; CLD ;SEND_ASCII_COUNT: ; LODSB ; CALL PRINT_BYTE ; Print it JC NEW_PRT_LINE_ENDP_2 ; If printer error then quit ; the loop and restore registers LOOP SEND_ASCII_COUNT ; POP CX ; Restore outside loop counter ADD DI,2 ; Point to next tag POP SI ; POP AX ; Restore COUNT DEC CX ; .WHEN <BL EQ LOWCOUNT_CODE> ; Sending lowbyte of COUNT CALL PRINT_BYTE ; Print it JC NEW_PRT_LINE_ENDP ; If printer error then quit ADD DI,2 ; Point to next tag DEC CX ; .WHEN <BL EQ HIGHCOUNT_CODE> ; Sending highbyte of COUNT PUSH AX ; Save count CWD ; MOV BX,100h ; DIV BX ; Put highbyte in AL CALL PRINT_BYTE ; Print it JC NEW_PRT_LINE_ENDP_1 ; If printer error then quit ; the loop and restore registers ADD DI,2 ; Point to next tag ; the loop. POP AX ; Restore count DEC CX ; .ENDSELECT ; .ENDWHILE ; ADD DI,2 ; Skip over DATA tag and byte ; so pointing to correct place when ; get to END_PRT_LINE proc.; /\ ~~mda(001) -----------------------------------------------------------------------
; \/ ~~mda(001) -----------------------------------------------------------------------; The following piece of code is replaced by the above piece; of code.;;;;; MOV DI,[BX].LOW_BYT_COUNT_PTR; DI := Offset of LOW byte of ;AN000;;;;; ADD DI,BP ; byte count ;AN000;;;;; MOV [DI],AL ; Store low byte ;AN000;;;;; MOV DI,[BX].HGH_BYT_COUNT_PTR; DI := Offset of HIGH byte of ;AN000;;;;; ADD DI,BP ; byte count ;AN000;;;;; MOV [DI],AH ; Store high byte ;AN000;;;;; ;AN000;;;;;;-------------------------------------------------------------------------------;AN000;;;;;; Send the GRAPHICS escape sequence to the printer: ;AN000;;;;;;-------------------------------------------------------------------------------;AN000;;;;; XOR CX,CX ; CX := Length of the escape seq;AN000;;;;; MOV CL,[BX].NUM_GRAPHICS_ESC ;AN000;;;;; MOV BX,[BX].GRAPHICS_ESC_PTR ; BX := Offset sequence to send ;AN000;;;;; ADD BX,BP ;AN000;;;;; ;AN000;;;;;SEND_1_GRAPHICS_BYTE: ;AN000;;;;; MOV AL,[BX] ; AL := byte to print ;AN000;;;;; CALL PRINT_BYTE ; Send it to the printer ;AN000;;;;; JC NEW_PRT_LINE_ENDP ; If printer error, quit the loop ;AN000;;;;; INC BX ; Get next byte ;AN000;;;;; LOOP SEND_1_GRAPHICS_BYTE ;AN000;; /\ ~~mda(001) -----------------------------------------------------------------------JMP SHORT NEW_PRT_LINE_ENDP ; ~~mda(001) Restore registers JMP SHORT NEW_PRT_LINE_ENDP ;NEW_PRT_LINE_ENDP_2: ; ~~mda(001) POP SINEW_PRT_LINE_ENDP_1: ; ~~mda(001) POP AXNEW_PRT_LINE_ENDP: ;AN000; POP DI ;AN000; POP DX ;AN000; POP CX ;AN000; POP BX ;AN000; POP AX ;AN000; RET ;AN000;NEW_PRT_LINE ENDP ;AN000;PAGE ;AN000;; \/ ~~mda(001) -----------------------------------------------------------------------; Since we have the keyword DATA, and we allow it to be anywhere; on the GRAPHICS line, then it is possible to have an; esc. sequence to send to the printer after the data has been; sent. Therefore we need this new procedure.;===============================================================================; ; END_PRT_LINE : SEND THE REST OF THE GRAPHICS LINE ; ;-------------------------------------------------------------------------------; ; INPUT: CUR_MODE_PTR = Offset of the DISPLAYMODE information ; record for the current mode ; DI = Points to the section of the esc. seq that; comes after the keyword DATA.; ; OUTPUT: PRINTER ; ; CALLED BY: PRT_BW_APA ; ;-------------------------------------------------------------------------------; ; DESCRIPTION: Extract the GRAPHICS escape sequence that comes after the keyword; DATA from the DISPLAYMODE information record; Send this escape sequence to the; printer. ; ;
CR_FOUND DB ? ; So we know if a carriage return has been sentLF_FOUND DB ? ; So we know if a line feed has been sent
END_PRT_LINE PROC NEAR PUSH AX PUSH BX PUSH CX PUSH DX PUSH DI MOV CR_FOUND,NO ; Initialize MOV LF_FOUND,NO ; MOV BX,CUR_MODE_PTR ; BX := Displaymode info record. ;-------------------------------------------------------------------------------; Set up the 2 bytes containing the number of bytes to send in the GRAPHICS seq.; NOTE: number of bytes to send is "CUR_SCAN_LNE_LENGTH * BOX_W" ;------------------------------------------------------------------------------- MOV AL,BOX_W ; cur_scan_lne_length * CBW ; printer box width = nb bytes to send MUL CUR_SCAN_LNE_LENGTH ; (result in DX AX) ;-------AX := Number of bytes to print
XOR CX,CX ; CX := Length of the escape seq MOV CL,[BX].NUM_GRAPHICS_ESC_AFTER_DATA ;after the word DATA
.WHILE <CX NE 0> ; Doing a while loop just in case DATA is the ; last word on the GRAPHICS line. In that case ; skip this and send a CR or LF if needed. MOV BL,BYTE PTR DS:[BP+DI] ; Get code.
.SELECT ; Case statement .WHEN <BL EQ ESC_NUM_CODE> ; We have an esc. number PUSH AX ; Save count INC DI ; Point to esc. number MOV AL,DS:[BP+DI] ; .IF <AL EQ CR> ; Check if a CR is MOV CR_FOUND,YES ; explicitly stated .ENDIF .IF <AL EQ LF> ; Check if a LF is MOV LF_FOUND,YES ; explicitly stated .ENDIF CALL PRINT_BYTE ; Send esc. number JC GOTO_END_PRT_LINE_ENDP_1; If printer error then quit ; the loop and restore registers INC DI ; Point to next tag POP AX ; Restore the count DEC CX ; .WHEN <BL EQ COUNT_CODE> ; Need to send count in ascii form PUSH AX ; Save count PUSH SI ; CALL GET_COUNT ; Get # of bytes to send to printer PUSH CX ; Save counter for outside loop XOR CH,CH ; MOV CL,DS:[BP].NUM_BYTES_FOR_COUNT ; LEA SI,DS:[BP].COUNT ; Get ptr. to count SUB SI,CX ; Need to send MSB first INC SI ; CLD ;SEND_THE_ASCII_COUNT: ; LODSB ; CALL PRINT_BYTE ; Print it JC GOTO_END_PRT_LINE_ENDP_2 ; If printer error then quit ; the loop and restore registers. LOOP SEND_THE_ASCII_COUNT ; POP CX ; Restore outside loop counter ADD DI,2 ; Point to next tag POP SI ; POP AX ; Restore COUNT DEC CX ; .WHEN <BL EQ LOWCOUNT_CODE> ; Sending lowbyte of COUNT CALL PRINT_BYTE ; Print it JC END_PRT_LINE_ENDP ; If printer error then quit ADD DI,2 ; Point to next tag DEC CX ; .WHEN <BL EQ HIGHCOUNT_CODE> ; Sending highbyte of COUNT PUSH AX ; Save count CWD ; MOV BX,100h ; DIV BX ; Put highbyte in AL CALL PRINT_BYTE ; Print it JC END_PRT_LINE_ENDP_1 ; If printer error then quit ; the loop and restore registers ADD DI,2 ; Point to next tag ; the loop. POP AX ; Restore count DEC CX ; .ENDSELECT ; .ENDWHILE ; JMP SHORT CR_LF ;GOTO_END_PRT_LINE_ENDP_2: ; Conditional jump was out of range JMP SHORT END_PRT_LINE_ENDP_2 ;GOTO_END_PRT_LINE_ENDP_1: ; Conditional jump was out of range JMP SHORT END_PRT_LINE_ENDP_1 ;CR_LF: ; .IF <DS:[BP].PRINTER_NEEDS_CR_LF EQ YES> ; ~~mda(003) We have an IBM type printer ; so we need to do a CR and LF if it ; already hasn't been done. .IF <CR_FOUND EQ NO> ; It hasn't been done. MOV AL,CR ; CALL PRINT_BYTE ; JC END_PRT_LINE_ENDP ; If printer error then quit .ENDIF ; .IF <LF_FOUND EQ NO> ; It hasn't been done. MOV AL,LF ; CALL PRINT_BYTE ; JC END_PRT_LINE_ENDP ; If printer error then quit .ENDIF ; ; .ENDIF ;JMP NEW_PRT_LINE_ENDP ; Restore registers JMP SHORT END_PRT_LINE_ENDP ;END_PRT_LINE_ENDP_2: ; Restore registers POP SI ;END_PRT_LINE_ENDP_1: ; Restore registers POP AX ;END_PRT_LINE_ENDP: ; POP DI ; POP DX ; POP CX ; POP BX ; POP AX ; RET ; END_PRT_LINE ENDP ; ; /\ ~~mda(001) -----------------------------------------------------------------------PAGE ;AN000;; \/ ~~mda(001) -----------------------------------------------------------------------; Since we now can do HP PCL, we have to get the number of; bytes that are going to be sent to the printer and convert ; the number to ASCII if DATA_TYPE = DATA_ROW.;===============================================================================;AN000;; ;AN000;; GET_COUNT : GET THE NUMBER OF BYTES TO SEND TO THE PRINTER ; ;AN000;;-------------------------------------------------------------------------------;AN000;; ;AN000;; INPUT: CUR_SCAN_LNE_LENGTH; NB_BOXES_PER_PRT_BUF ;AN000;; ;AN000;; output : si pointer to ascii string;; si --> len=4 (hex = 4d2h); 1; 2; 3; 4;; count (from shared_data_area);; ;AN000;; CALLED BY: NEW_PRT_LINE; END_PRT_LINE; ;AN000;;-------------------------------------------------------------------------------;AN000;GET_COUNT proc near push ax ; push bx ; push cx ; push dx ; push si ;
mov ax,cur_scan_lne_length ; Get # bytes to send to cwd ; the printer xor bh,bh ; mov bl,nb_boxes_per_prt_buf ; div bx ; .IF <DX NE 0> ; So don't lose data when INC AX ; have a remainder. .ENDIF ;
;;--------- AX is the # bytes to send to the printer. Now convert it to ascii. ; xor dx,dx ;clear upper 16 bits lea si,ds:[bp].count ;get pointer PUSH SI ; Save ptr. MOV CX,5 ; Init. COUNTINIT_COUNT: ; MOV BYTE PTR [SI],0 ; DEC SI ; LOOP INIT_COUNT ; POP SI ; ; mov bx,10 ; mod 10, div 10 xor cx,cx ;length counter = 0hx_asc: ; div bx ;div, mod add dl,'0' ;add 48 for ASCII mov [si],dl ;store it dec si ;point to next string element inc cx ;inc length counter xor dx,dx ;consider only div part for next loop cmp ax,0 ;end of loops ? (div=0) jnz hx_asc ;no mov ds:[bp].num_bytes_for_count,cl ;save the length ; pop si ; pop dx ; pop cx ; pop bx ; pop ax ; ret ;GET_COUNT endp ;; /\ ~~mda(001) -----------------------------------------------------------------------PAGE ;;===============================================================================;AN000;; ;AN000;; PRINT_BYTE : SEND A BYTE TO THE PRINTER AT LPT1 ;AN000;; ;AN000;;-------------------------------------------------------------------------------;AN000;; ;AN000;; INPUT: AL = Byte to be printed ;AN000;; ;AN000;; OUTPUT: PRINTER ;AN000;; ERROR_CODE = PRINTER_ERROR if an error is detected. ;AN000;; Carry flag is set in case of error. ;AN000;; ;AN000;;-------------------------------------------------------------------------------;AN000;PRINT_BYTE PROC NEAR ;AN000; PUSH AX ;AN000; PUSH DX ;AN000; ;AN000; MOV DX,0000 ; PRINTER NUMBER ;AN000; MOV AH,00 ; REQUEST PRINT ;AN000; INT 17H ; CALL BIOS : SEND THE CHARACTER ;AN000; ;AN000; AND AH,00101001B ; Test error code returned in AH for ;AN000; ; "Out of paper", "I/O error" and "Time-out". ;AN000; JNZ PRINT_BYTE_ERROR; Set the error code if error ;AN000; JMP SHORT PRINT_BYTE_END ; else, return normally ;AN000;PRINT_BYTE_ERROR: ;AN000; MOV ERROR_CODE,PRINTER_ERROR ;AN000; STC ; Set the carry flag to indicate ERROR ;AN000;PRINT_BYTE_END: ;AN000; POP DX ;AN000; POP AX ;AN000; RET ;AN000;PRINT_BYTE ENDP ;AN000;PAGE ;AN000;;===============================================================================;AN000;; ;AN000;; READ_DOT: READ A PIXEL - RETURN A COLOR TRANSLATION TABLE INDEX ;AN000;; ;AN000;;-------------------------------------------------------------------------------;AN000;; ;AN000;; INPUT: CUR_MODE = Current video mode. ;AN000;; CUR_ROW, ;AN000;; CUR_COLUMN = Coordinates of the pixel to be read. ;AN000;; CUR_PAGE = Active page number ;AN000;; ;AN000;; OUTPUT: AL = Index into COLOR TRANSLATION TABLE. ;AN000;; ;AN000;; DEPENDENCIES : COLOR TRANSLATION TABLE entries must be bytes ;AN000;; ;AN000;; ;AN000;;-------------------------------------------------------------------------------;AN000;; ;AN000;; DESCRIPTION: Use VIDEO BIOS INTERRUPT 10H "READ DOT CALL". ;AN000;; ;AN000;; Depending on the video hardware, the dot returned by BIOS has ;AN000;; different meanings. ;AN000;; With an EGA it is an index into the Palette registers, ;AN000;; With a CGA it is a number from 0 to 3, mapping to a specific color ;AN000;; depending on the background color and the color palette currently ;AN000;; selected. ;AN000;; ;AN000;; The Color Translation table has been set up to hold the correct color ;AN000;; mapping for any "dot" in any mode. Therefore, the dot number returned ;AN000;; by INT 10H can be used with any mode as a direct index within that ;AN000;; table. ;AN000;; ;AN000;; With APA Monochrome mode 0FH there are 4 different dots: white, ;AN000;; blinking white, high-intensity white, and black. ;AN000;; ;AN000;; For mode 0FH, the dot returned by interrupt 10 "read dot" call is a byte ;AN000;; where only bits 0 and 2 are significant. These 2 bits must be appended ;AN000;; together in order to obtain a binary number (from 0 to 3) that will be used ;AN000;; as an index in the Color Translation table. ;AN000;; ;AN000;; For mode 11H, the dot is either 0 (for background color) or 7 (for the ;AN000;; foreground color) only the LSB is returned. That is, we return either ;AN000;; 0 or 1. ;AN000;; ;AN000;; LOGIC: ;AN000;; ;AN000;; Call VIDEO BIOS "READ DOT" ;AN000;; IF CUR_MODE = 0FH ;AN000;; THEN ;AN000;; Append bits 1 and 3. ;AN000;; IF CUR_MODE = 11H ;AN000;; THEN ;AN000;; Wipe out bits 1 and 2. ;AN000;; ;AN000;READ_DOT PROC NEAR ;AN000; PUSH BX ; Save registers ;AN000; PUSH CX ;AN000; PUSH DX ;AN000; ;AN000; MOV BH,CUR_PAGE ;AN000; MOV DX,CUR_ROW ;AN000; MOV CX,CUR_COLUMN ;AN000; MOV AH,READ_DOT_CALL ;AN000; INT 10H ; Call BIOS: AL <-- Dot read ;AN000; ;AN000; CMP CUR_MODE,0FH ; Is it Mode 0fH ? ;AN000; JNE MODE_11H? ; No, look for mode 11h. ;AN000;;-------Mode 0Fh is the current mode: ;AN000;;-------Convert bits 2 and 0 into a 2 bit number: ;AN000; MOV BL,AL ; BL := AL = "Pixel read" ;AN000; AND BL,00000100B ; Wipe off all bits but bit 2 in BL ;AN000; AND AL,00000001B ; Wipe off all bits but bit 0 in AL ;AN000; SHR BL,1 ; Move bit 2 to bit 1 in BL ;AN000; OR AL,BL ; Append bit 1 and bit 0 ;AN000; JMP SHORT READ_DOT_END ; Quit. ;AN000; ;AN000;MODE_11H?: ;AN000; CMP CUR_MODE,11H ; Is it Mode 0fH ? ;AN000; JNE READ_DOT_END ; No, quit ;AN000; ;AN000;;-------Mode 11H is the current mode: ;AN000; AND AL,00000001B ; Keep only the Least significant bit ;AN000; ;AN000;READ_DOT_END: ;AN000; POP DX ; Restore registers ;AN000; POP CX ;AN000; POP BX ;AN000; RET ;AN000;READ_DOT ENDP ;AN000;
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