+++ /dev/null
-;-----------------------------------------------------------\r
-;\r
-; MXTL.ASM - Put tile\r
-; Copyright (c) 1994 by Alessandro Scotti\r
-;\r
-;-----------------------------------------------------------\r
-WARN PRO\r
-NOWARN RES\r
-INCLUDE MODEX.DEF\r
-\r
-PUBLIC mxPutTile\r
-PUBLIC mxTransPutTile\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
-;-----------------------------------------------------------\r
-;\r
-; Copies a "mode-x" tile from memory to screen.\r
-;\r
-; Input:\r
-; Image = pointer to tile\r
-; X, Y = coordinates of destination\r
-; Width = width of image in pixels (Width and 3 = 0)\r
-; Height = height of image in pixels\r
-; Output:\r
-; none\r
-; Note:\r
-; no clipping is performed on tiles!\r
-;\r
-mxPutTile PROC FAR\r
- ARG Height:WORD, \\r
- Width:WORD, \\r
- Y:WORD, \\r
- X:WORD, \\r
- Image:DWORD = ARG_SIZE\r
- ASSUME ds:NOTHING\r
- .enter 0\r
- .push ds, si, es, di\r
-\r
- mov ax, [Y] ; Get pixel address\r
- mul [mx_BytesPerLine]\r
- mov di, [X]\r
- .shr di, 2\r
- add di, ax\r
- mov es, [mx_VideoSegment]\r
-\r
- lds si, [Image] ; Get tile address\r
- .shr [Width], 2 ; Number of bytes per plane\r
- mov cl, BYTE PTR [X]\r
- and cl, 3\r
- mov ah, 11h ; AH = plane mask\r
- shl ah, cl ; Align mask to first plane\r
-\r
- mov [Y], 4 ; Number of planes\r
- mov bx, [mx_BytesPerLine]\r
- sub bx, [Width] ; Extra bytes per line\r
-@@Loop:\r
- mov al, 02h\r
- mov dx, TS\r
- out dx, ax ; Set write plane\r
- mov [X], di ; Save video offset\r
- mov dx, [Height]\r
-@@Loop2:\r
- mov cx, [Width] ; Number of bytes to move\r
-\r
- shr cx, 1 ; Move line\r
- rep movsw\r
- rcl cx, 1\r
- rep movsb\r
-\r
- add di, bx ; Move video offset to next line\r
- dec dx ; Done all lines?\r
- jnz @@Loop2 ; No, continue\r
- mov di, [X] ; Restore video offset\r
- rol ah, 1 ; Next plane\r
- adc di, 0 ; Bump video offset if needed\r
- dec [Y] ; Any plane left?\r
- jnz @@Loop ; Yes, keep looping\r
-\r
- xor ax, ax\r
- .pop ds, si, es, di\r
- .leave ARG_SIZE\r
-mxPutTile ENDP\r
-\r
-;-----------------------------------------------------------\r
-;\r
-; Copies a "mode-x" tile from memory to screen.\r
-; Skips over color 0.\r
-;\r
-; Input:\r
-; Image = pointer to tile\r
-; X, Y = coordinates of destination\r
-; Width = width of image in pixels (Width and 3 = 0)\r
-; Height = height of image in pixels\r
-; Output:\r
-; none\r
-; Note:\r
-; no clipping is performed on tiles!\r
-;\r
-mxTransPutTile PROC FAR\r
- ARG Height:WORD, \\r
- Width:WORD, \\r
- Y:WORD, \\r
- X:WORD, \\r
- Image:DWORD = ARG_SIZE\r
- ASSUME ds:NOTHING\r
- .enter 0\r
- .push ds, si, es, di\r
-\r
- mov ax, [Y] ; Get pixel address\r
- mul [mx_BytesPerLine]\r
- mov di, [X]\r
- .shr di, 2\r
- add di, ax\r
- mov es, [mx_VideoSegment]\r
-\r
- lds si, [Image] ; Get tile address\r
- .shr [Width], 2 ; Number of bytes per plane\r
- mov cl, BYTE PTR [X]\r
- and cl, 3\r
- mov ah, 11h ; AH = plane mask\r
- shl ah, cl ; Align mask to first plane\r
-\r
- mov [Y], 4 ; Number of planes\r
- mov bx, [mx_BytesPerLine]\r
- sub bx, [Width] ; Extra bytes per line\r
-@@Loop:\r
- mov al, 02h\r
- mov dx, TS\r
- out dx, ax ; Set write plane\r
- mov [X], di ; Save video offset\r
- mov dx, [Height]\r
-@@Loop2:\r
- mov cx, [Width] ; Number of bytes to move\r
-\r
-; Move one line\r
- jcxz @@MoveLineDone\r
-@@MoveLineLoop:\r
- mov al, ds:[si]\r
- test al, al\r
- jz @@MoveLineNext\r
- mov es:[di], al\r
-@@MoveLineNext:\r
- inc si\r
- inc di\r
- dec cx\r
- jnz @@MoveLineLoop\r
-@@MoveLineDone:\r
-\r
- add di, bx ; Move video offset to next line\r
- dec dx ; Done all lines?\r
- jnz @@Loop2 ; No, continue\r
- mov di, [X] ; Restore video offset\r
- rol ah, 1 ; Next plane\r
- adc di, 0 ; Bump video offset if needed\r
- dec [Y] ; Any plane left?\r
- jnz @@Loop ; Yes, keep looping\r
-\r
- xor ax, ax\r
- .pop ds, si, es, di\r
- .leave ARG_SIZE\r
-mxTransPutTile ENDP\r
-\r
-MX_TEXT ENDS\r
-END\r
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