+++ /dev/null
-;-----------------------------------------------------------\r
-;\r
-; MXPI.ASM - Put image\r
-; Copyright (c) 1993,1994 by Alessandro Scotti\r
-;\r
-;-----------------------------------------------------------\r
-WARN PRO\r
-NOWARN RES\r
-INCLUDE MODEX.DEF\r
-\r
-PUBLIC mxPutImage\r
-\r
-EXTRN subClipImage : NEAR\r
-\r
-MX_TEXT SEGMENT USE16 PARA PUBLIC 'CODE'\r
- ASSUME cs:MX_TEXT, ds:NOTHING, es:NOTHING\r
-\r
-EXTRN mx_VideoSegment : WORD\r
-EXTRN mx_BytesPerLine : WORD\r
-\r
-mxTable LABEL WORD ; Raster ops\r
- DW subMove\r
- DW subAnd\r
- DW subOr\r
- DW subXor\r
- DW subTrans\r
- DW subAdd\r
-\r
-;-----------------------------------------------------------\r
-;\r
-; Move functions.\r
-; Note: loops unrolled and optimized for CX even, no check for CX = 0.\r
-;\r
-subMove PROC NEAR\r
- shr cx, 1 ; Make CX even\r
- jc @@Odd ; Special case if odd byte\r
-@@Loop: movsb\r
- add si, 3\r
- movsb\r
- add si, 3\r
- dec cx\r
- jnz @@Loop\r
-@@Exit: ret\r
-@@Odd: movsb\r
- add si, 3\r
- jcxz @@Exit\r
- jmp @@Loop\r
-subMove ENDP\r
-;\r
-subAnd PROC NEAR\r
- shr cx, 1\r
- jc @@Odd\r
-@@Loop: mov al, ds:[si]\r
- mov ah, ds:[si+4]\r
- and es:[di], ax\r
- inc di\r
- inc di\r
- add si, 8\r
- dec cx\r
- jnz @@Loop\r
-@@Exit: ret\r
-@@Odd: lodsb\r
- and es:[di], al\r
- inc di\r
- add si, 3\r
- jcxz @@Exit\r
- jmp @@Loop\r
-subAnd ENDP\r
-;\r
-subOr PROC NEAR\r
- shr cx, 1\r
- jc @@Odd\r
-@@Loop: mov al, ds:[si]\r
- mov ah, ds:[si+4]\r
- or es:[di], ax\r
- inc di\r
- inc di\r
- add si, 8\r
- dec cx\r
- jnz @@Loop\r
-@@Exit: ret\r
-@@Odd: lodsb\r
- or es:[di], al\r
- inc di\r
- add si, 3\r
- jcxz @@Exit\r
- jmp @@Loop\r
-subOr ENDP\r
-;\r
-subXor PROC NEAR\r
- shr cx, 1\r
- jc @@Odd\r
-@@Loop: mov al, ds:[si]\r
- mov ah, ds:[si+4]\r
- xor es:[di], ax\r
- inc di\r
- inc di\r
- add si, 8\r
- dec cx\r
- jnz @@Loop\r
-@@Exit: ret\r
-@@Odd: lodsb\r
- xor es:[di], al\r
- inc di\r
- add si, 3\r
- jcxz @@Exit\r
- jmp @@Loop\r
-subXor ENDP\r
-;\r
-subTrans PROC NEAR\r
-@@Loop: mov al, ds:[si]\r
- cmp al, ah\r
- je @@Skip\r
- mov es:[di], al\r
-@@Skip: inc di\r
- add si, 4\r
- dec cx\r
- jnz @@Loop\r
-@@Exit: ret\r
-subTrans ENDP\r
-;\r
-subAdd PROC NEAR\r
-@@Loop: mov al, ds:[si]\r
- add es:[di], al\r
- inc di\r
- add si, 4\r
- dec cx\r
- jnz @@Loop\r
- ret\r
-subAdd ENDP\r
-\r
-;-----------------------------------------------------------\r
-;\r
-; Copies a "raw" image from memory to screen.\r
-;\r
-; Input:\r
-; Image = pointer to image\r
-; X, Y = coordinates of destination\r
-; Width = width of image in pixels\r
-; Height = height of image in pixels\r
-; Op = raster op (OP_xxx)\r
-; Output:\r
-; none\r
-;\r
-mxPutImage PROC FAR\r
- ARG Op:WORD, \\r
- Height:WORD, \\r
- Width:WORD, \\r
- Y:WORD, \\r
- X:WORD, \\r
- Image:DWORD = ARG_SIZE\r
- LOCAL PlaneWidth:WORD:4, \\r
- PixelOffset:WORD, \\r
- MoveFunction:WORD, \\r
- Count:BYTE, \\r
- ReadPlane:BYTE, \\r
- OpInfo:BYTE, \\r
- WritePlane:BYTE = AUTO_SIZE\r
- ASSUME ds:NOTHING\r
- .enter AUTO_SIZE\r
- .push ds, si, es, di\r
-\r
-; Clip image\r
- mov bx, [X]\r
- mov ax, [Y]\r
- mov cx, [Width]\r
- mov dx, [Height]\r
- call subClipImage\r
- jc @@Exit ; Full clipped\r
- mov [Height], dx\r
- add WORD PTR Image[0], si ; Skip clipped pixels\r
-\r
-; Get pixel address\r
- mul [mx_BytesPerLine]\r
- mov di, bx\r
- shr di, 1\r
- shr di, 1\r
- add di, ax\r
- mov [PixelOffset], di\r
- mov es, [mx_VideoSegment] ; ES:DI points to pixel\r
- and bl, 03h\r
- mov [ReadPlane], bl\r
-\r
-; Compute extra bytes and width count for each plane\r
- mov bx, cx\r
- shr bx, 1\r
- shr bx, 1 ; Width for each plane\r
- and cl, 03h\r
- mov al, 00001000b\r
- shr al, cl\r
- mov si, 3 SHL 1\r
-@@PatchLoop:\r
- mov PlaneWidth[si], bx\r
- shr al, 1\r
- adc bx, 0\r
- dec si\r
- dec si\r
- jge @@PatchLoop\r
-\r
-; Setup planes for output to VGA registers\r
- mov cl, [ReadPlane]\r
- mov al, 00010001b\r
- shl al, cl\r
- mov [WritePlane], al\r
-\r
-; Install move function\r
- mov bx, [Op]\r
- mov [OpInfo], bh ; Remember additional info if needed\r
- xor bh, bh\r
- cmp bl, OP_ADD\r
- jbe @@SetMoveFunction\r
- xor bl, bl\r
-@@SetMoveFunction:\r
- shl bx, 1\r
- mov ax, mxTable[bx]\r
- mov [MoveFunction], ax\r
-\r
-; Put image\r
- cld\r
- mov [Count], 4 ; Four planes\r
- lea bx, PlaneWidth ; SS:[BX] = width in bytes for plane\r
- mov ds, WORD PTR Image[2]\r
-@@PlaneLoop:\r
- cmp WORD PTR ss:[bx], 0 ; Exit if nothing more to do\r
- je @@Exit ; (also, never try to move zero bytes!)\r
- mov si, WORD PTR Image[0]\r
- mov ah, [WritePlane]\r
- and ah, 0Fh\r
- mov al, 02h\r
- mov dx, TS\r
- out dx, ax ; Select write plane\r
- mov ah, [ReadPlane]\r
- and ah, 03h\r
- mov al, 04h\r
- mov dx, GDC\r
- out dx, ax ; Select read plane\r
- mov dx, [Height]\r
- mov di, [PixelOffset]\r
-@@Loop:\r
- push si\r
- push di\r
- mov cx, WORD PTR ss:[bx] ; Number of bytes to move\r
- mov ah, [OpInfo] ; Transparent color for subTrans\r
- call [MoveFunction]\r
- pop di\r
- pop si\r
- add si, [Width] ; Go to next image line\r
- add di, [mx_BytesPerLine] ; Go to next screen row\r
- dec dx\r
- jnz @@Loop ; Repeat for all lines\r
- inc bx\r
- inc bx ; Select width for next plane\r
- inc [ReadPlane]\r
- rol [WritePlane], 1\r
- adc [PixelOffset], 0\r
- inc WORD PTR Image[0]\r
- dec [Count]\r
- jnz @@PlaneLoop ; Repeat for all planes\r
-\r
-@@Exit:\r
- xor ax, ax\r
- .pop ds, si, es, di\r
- .leave ARG_SIZE\r
-mxPutImage ENDP\r
-\r
-MX_TEXT ENDS\r
-END\r
projects / 16.git / blobdiff