+++ /dev/null
-;-----------------------------------------------------------\r
-;\r
-; MXOT.ASM - Text functions\r
-; Copyright (c) 1994 by Alessandro Scotti\r
-;\r
-;-----------------------------------------------------------\r
-WARN PRO\r
-NOWARN RES ; We use the reserved name 'WIDTH'\r
-INCLUDE MODEX.DEF\r
-\r
-PUBLIC mxOutChar\r
-PUBLIC mxOutText\r
-PUBLIC mxSetFont\r
-PUBLIC mxSetTextColor\r
-PUBLIC mxGetTextStep\r
-PUBLIC mxSetTextStep\r
-\r
-MAX_WIDTH EQU 16 ; Must be <= 16\r
-MAX_HEIGHT EQU 32\r
-\r
-MX_TEXT SEGMENT USE16 PARA PUBLIC 'CODE'\r
- ASSUME cs:MX_TEXT, ds:NOTHING, es:NOTHING\r
-\r
-EXTRN mx_CodeSegment : WORD\r
-EXTRN mxPutImage : FAR\r
-\r
-; Default 8x8 font\r
-fnt_Default LABEL\r
- INCLUDE DEFAULT.FNT\r
-\r
-; Table of system fonts\r
-tbl_SystemFont LABEL WORD\r
- DW fnt_Default, 8, 8\r
-\r
-MX_MAXSYSFONT EQU ($-OFFSET tbl_SystemFont) SHR 2\r
-\r
-mx_FontPtr DW OFFSET fnt_Default, SEG MX_TEXT\r
-mx_FontWidth DW 8 ; Font width in pixels\r
-mx_FontHeight DW 8 ; Font height in pixels\r
-mx_FontCharSize DW 8 ; Size in bytes of a font character\r
-mx_FontColor DW 00FFh ; Color: foreground + background*256\r
-mx_FontOp DW OP_MOVE ; Raster op\r
-mx_DeltaX DW 8 ; Horizontal step\r
-mx_DeltaY DW 0 ; Vertical step\r
-\r
-;-----------------------------------------------------------\r
-;\r
-; Sets the current font.\r
-;\r
-; Input:\r
-; Font = pointer to font data\r
-; Width = width of font character in pixels\r
-; Height = height of font character in pixels\r
-; Output:\r
-; AX = 0 on success, else invalid parameters\r
-;\r
-; Note: when the high word of Font (i.e. the segment) is zero, the low\r
-; word is used to select one of the system fonts.\r
-;\r
-mxSetFont PROC FAR\r
- ARG Height:WORD, \\r
- Width:WORD, \\r
- Font:DWORD = ARG_SIZE\r
- .enter 0\r
- .push ds\r
-\r
- mov ds, [mx_CodeSegment]\r
- ASSUME ds:MX_TEXT\r
-\r
- mov ax, WORD PTR Font[2] ; Get font segment\r
- test ax, ax ; Null segment?\r
- jnz @@UserFont ; No, install user font\r
-\r
-; Install system font\r
- mov ax, WORD PTR Font[0] ; Get font number\r
- cmp ax, MX_MAXSYSFONT ; Check range\r
- jb @@SystemFont\r
- xor ax, ax ; Out of range, use default font\r
-@@SystemFont:\r
- shl ax, 1\r
- shl ax, 1\r
- mov bx, ax\r
- mov ax, tbl_SystemFont[bx] ; Get font offset\r
- mov WORD PTR mx_FontPtr[0], ax\r
- mov WORD PTR mx_FontPtr[2], cs\r
- mov al, BYTE PTR tbl_SystemFont[bx+2]\r
- xor ah, ah\r
- mov [mx_FontWidth], ax\r
- mov [mx_DeltaX], ax\r
- mov dl, BYTE PTR tbl_SystemFont[bx+3]\r
- xor dh, dh\r
- mov [mx_FontHeight], dx\r
- mul dx\r
- mov [mx_FontCharSize], ax\r
- mov [mx_DeltaX], ax\r
- xor ax, ax\r
- mov [mx_DeltaY], ax\r
- jmp @@Exit\r
-\r
-; Install user font\r
-@@UserFont:\r
- mov ax, -1 ; Assume an error\r
- mov bx, [Width]\r
- cmp bx, MAX_WIDTH\r
- ja @@Exit ; Invalid character width\r
- mov dx, [Height]\r
- cmp dx, MAX_HEIGHT\r
- ja @@Exit ; Invalid character height\r
- mov [mx_FontWidth], bx\r
- mov [mx_FontHeight], dx\r
- mov ax, bx\r
- add ax, 7\r
- .shr ax, 3\r
- mul dx\r
- mov [mx_FontCharSize], ax\r
- mov ax, WORD PTR Font[0]\r
- mov WORD PTR mx_FontPtr[0], ax\r
- mov ax, WORD PTR Font[2]\r
- mov WORD PTR mx_FontPtr[2], ax\r
- xor ax, ax\r
-\r
-@@Exit:\r
- .pop ds\r
- ASSUME ds:NOTHING\r
- .leave ARG_SIZE\r
-mxSetFont ENDP\r
-\r
-;-----------------------------------------------------------\r
-;\r
-; Sets the text color and raster op.\r
-;\r
-; Input:\r
-; Color = text color (foreground + background*256)\r
-; Op = raster op\r
-; Output:\r
-; none\r
-;\r
-mxSetTextColor PROC FAR\r
- ARG Op:WORD, \\r
- Color:WORD = ARG_SIZE\r
- .enter 0\r
- .push ds\r
-\r
- mov ds, [mx_CodeSegment]\r
- ASSUME ds:MX_TEXT\r
-\r
- mov ax, [Color]\r
- mov [mx_FontColor], ax\r
- mov ax, [Op]\r
- mov [mx_FontOp], ax\r
-\r
- xor ax, ax\r
- .pop ds\r
- ASSUME ds:NOTHING\r
- .leave ARG_SIZE\r
-mxSetTextColor ENDP\r
-\r
-;-----------------------------------------------------------\r
-;\r
-; Writes a character using the current font and attributes.\r
-;\r
-; Input:\r
-; X, Y = video coordinates\r
-; C = character to print\r
-; Output:\r
-; none\r
-;\r
-mxOutChar PROC FAR\r
- ARG C:BYTE:2, \\r
- Y:WORD, \\r
- X:WORD = ARG_SIZE\r
- LOCAL Image:BYTE:MAX_WIDTH*MAX_HEIGHT, \\r
- Count:WORD = AUTO_SIZE\r
- .enter AUTO_SIZE\r
- .push ds, si, es, di\r
- ASSUME ds:NOTHING\r
-\r
-; Gets the pointer to font data for the selected character\r
- lds si, DWORD PTR [mx_FontPtr]\r
- mov al, [C]\r
- xor ah, ah\r
- mul [mx_FontCharSize] ; Offset into font\r
- add si, ax ; DS:SI -> font data for character\r
-\r
-; Converts font data into a 256-color linear image\r
- mov ax, ss\r
- mov es, ax\r
- lea di, [Image]\r
- mov dx, [mx_FontColor]\r
- mov ax, [mx_FontHeight]\r
- mov [Count], ax\r
-@@HeightLoop:\r
- mov cx, [mx_FontWidth]\r
- mov bh, ds:[si]\r
- inc si ; Get a byte from font data\r
- cmp cx, 8\r
- jbe @@WidthLoop ; Ok for width <= 8\r
- mov bl, ds:[si] ; Get another byte\r
- inc si\r
-@@WidthLoop:\r
- mov al, dl ; Assume foreground color\r
- shl bx, 1 ; Is font bit set?\r
- jc @@1 ; Yes, foreground is just great\r
- mov al, dh ; Get background color\r
-@@1:\r
- mov es:[di], al ; Put pixel into image\r
- inc di\r
- dec cx\r
- jnz @@WidthLoop\r
- dec [Count]\r
- jnz @@HeightLoop\r
-\r
-; Now pass image to mx_PutImage\r
- lea ax, [Image]\r
- push es\r
- push ax ; Pointer to image\r
- push [X]\r
- push [Y] ; Image coordinates\r
- push [mx_FontWidth]\r
- push [mx_FontHeight] ; Image size\r
- push [mx_FontOp] ; Raster op\r
- call mxPutImage ; Write character\r
-\r
- xor ax, ax\r
- .pop ds, si, es, di\r
- .leave ARG_SIZE\r
-mxOutChar ENDP\r
-\r
-;-----------------------------------------------------------\r
-;\r
-; Writes a string at the coordinates specified.\r
-;\r
-; Input:\r
-; X, Y = text coordinates\r
-; S = pointer to ASCIIZ string\r
-; Output:\r
-; none\r
-;\r
-mxOutText PROC FAR\r
- ARG S:DWORD, \\r
- Y:WORD, \\r
- X:WORD = ARG_SIZE\r
- .enter 0\r
- .push ds, si\r
- ASSUME ds:NOTHING\r
-\r
- lds si, [S]\r
-@@Loop:\r
- mov al, ds:[si]\r
- test al, al ; End of string?\r
- jz @@Exit ; Yes, exit\r
- inc si\r
- push [X] ; Display character\r
- push [Y]\r
- push ax\r
- call mxOutChar\r
- mov ax, [mx_DeltaX]\r
- add [X], ax ; Bump X coordinate\r
- mov ax, [mx_DeltaY]\r
- add [Y], ax ; Bump Y coordinate\r
- dec [Count]\r
- jnz @@Loop\r
-\r
-@@Exit:\r
- xor ax, ax\r
- .pop ds, si\r
- .leave ARG_SIZE\r
- ret\r
-mxOutText ENDP\r
-\r
-;-----------------------------------------------------------\r
-;\r
-; Sets the distance between characters.\r
-;\r
-; Input:\r
-; DeltaX = horizontal distance in pixels\r
-; DeltaY = vertical distance in pixels\r
-; Output:\r
-; none\r
-;\r
-; Note: this function may be used to set the text direction.\r
-;\r
-mxSetTextStep PROC FAR\r
- ARG DeltaY:WORD, \\r
- DeltaX:WORD = ARG_SIZE\r
- .enter 0\r
- .push ds\r
-\r
- mov ds, [mx_CodeSegment]\r
- ASSUME ds:MX_TEXT\r
-\r
- mov ax, [DeltaX]\r
- mov [mx_DeltaX], ax\r
- mov ax, [DeltaY]\r
- mov [mx_DeltaY], ax\r
-\r
- .pop ds\r
- .leave ARG_SIZE\r
-mxSetTextStep ENDP\r
-\r
-;-----------------------------------------------------------\r
-;\r
-; Gets the current distance between characters.\r
-;\r
-; Input:\r
-; DeltaX = pointer to horizontal distance in pixels (integer)\r
-; DeltaY = pointer to vertical distance in pixels (integer)\r
-; Output:\r
-; none\r
-;\r
-mxGetTextStep PROC FAR\r
- ARG DeltaY:DWORD, \\r
- DeltaX:DWORD = ARG_SIZE\r
- .enter 0\r
- .push ds, si\r
- ASSUME ds:NOTHING\r
-\r
- mov ax, [mx_DeltaX]\r
- lds si, [DeltaX]\r
- mov ds:[si], ax\r
- mov ax, [mx_DeltaY]\r
- lds si, [DeltaY]\r
- mov ds:[si], ax\r
-\r
- .pop ds, si\r
- .leave ARG_SIZE\r
-mxGetTextStep ENDP\r
-\r
-MX_TEXT ENDS\r
-END\r
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