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[16.git] / 16 / x_ / mxhl.asm

diff --git a/16/x_/mxhl.asm b/16/x_/mxhl.asm
deleted file mode 100755 (executable)
index 049a056..0000000
--- a/16/x_/mxhl.asm
+++ /dev/null
@@ -1,76 +0,0 @@
-;-----------------------------------------------------------\r
-;\r
-; MXHL.ASM - Horizontal line mask utility\r
-; Copyright (c) 1993,1994 by Alessandro Scotti\r
-;\r
-;-----------------------------------------------------------\r
-WARN    PRO\r
-INCLUDE MODEX.DEF\r
-\r
-PUBLIC  subHorizontalLineInfo\r
-\r
-MX_TEXT         SEGMENT USE16 PARA PUBLIC 'CODE'\r
-                ASSUME cs:MX_TEXT, ds:NOTHING, es:NOTHING\r
-\r
-EXTRN   mx_BytesPerLine : WORD\r
-\r
-tblLeftSize     DW      00h, 03h, 02h, 01h\r
-tblLeftMask     DB      00h, 0Eh, 0Ch, 08h\r
-tblRightMask    DB      00h, 01h, 03h, 07h\r
-tblPatchMask    DB      02h, 06h\r
-\r
-;-----------------------------------------------------------\r
-;\r
-; Prepares register for fast horizontal line drawing.\r
-;\r
-; Input:\r
-;       BX, AX  = X, Y address of left pixel\r
-;       CX      = line width\r
-; Output:\r
-;       DI      = left pixel offset in video memory\r
-;       AL      = left block write plane mask (0 = none)\r
-;       AH      = right block write plane mask (0 = none)\r
-;       CX      = center block width in 4-pixel blocks\r
-;\r
-subHorizontalLineInfo   PROC NEAR\r
-        ASSUME  ds:NOTHING\r
-\r
-        mul     [mx_BytesPerLine]\r
-        mov     di, bx\r
-        shr     di, 1\r
-        shr     di, 1\r
-        add     di, ax                  ; Offset of left pixel\r
-\r
-        and     bx, 03h\r
-        mov     al, tblLeftMask[bx]\r
-        shl     bx, 1\r
-        sub     cx, tblLeftSize[bx]\r
-        jge     @@1                     ; Ok to continue\r
-\r
-; Special case: start and end in the middle of a 4-pixel block.\r
-; There are only three cases:\r
-;    Pixels     Left mask       CX      CX+2    Patch mask      Result\r
-; 1)  ..o.        ..xx          -1      1       .xx.            ..x.\r
-; 2)  .oo.        .xxx          -1      1       .xx.            .xx.\r
-; 3)  .o..        .xxx          -2      0       .x..            .x..\r
-; All other cases are automatically handled with the standard masks.\r
-        mov     bx, cx\r
-        inc     bx\r
-        inc     bx\r
-        and     al, tblPatchMask[bx]    ; Combine masks\r
-        xor     ah, ah                  ; No right block\r
-        xor     cx, cx                  ; No center block\r
-        jmp     @@Exit\r
-\r
-@@1:\r
-        mov     bx, cx\r
-        and     bx, 03h\r
-        mov     ah, tblRightMask[bx]\r
-        shr     cx, 2\r
-\r
-@@Exit:\r
-        ret\r
-subHorizontalLineInfo   ENDP\r
-\r
-MX_TEXT         ENDS\r
-END\r