539 lines
14 KiB
NASM
539 lines
14 KiB
NASM
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title mapa.asm
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page ,132
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?PLM=1 ; PASCAL Calling convention is DEFAULT
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?WIN=0 ; Windows calling convention
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.xlist
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include cmacro32.inc
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include windows.inc
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.list
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; -------------------------------------------------------
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; DATA SEGMENT DECLARATIONS
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; -------------------------------------------------------
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ifndef SEGNAME
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SEGNAME equ <_TEXT>
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endif
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createSeg %SEGNAME, CodeSeg, word, public, CODE
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sBegin CodeSeg
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.386
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assumes cs,CodeSeg
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assumes ds,nothing
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assumes es,nothing
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;--------------------------------------------------------------------------;
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;
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; STOSB32 - store a byte, every four times doing a STOSD
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;
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;--------------------------------------------------------------------------;
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STOSB32_N = 0
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STOSB32 macro
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ror eax,8 ; rotate pixel (al) into eax
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STOSB32_N = STOSB32_N + 1
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if (STOSB32_N mod 4) eq 0
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;; stos dword ptr es:[edi]
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mov dword ptr es:[edi], eax
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add edi,4
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endif
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endm
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;--------------------------------------------------------------------------;
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;
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; LODSB32 - get a byte, every four times doing a LODSD
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;
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;--------------------------------------------------------------------------;
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LODSB32_N = 0
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LODSB32 macro
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if (LODSB32_N mod 4) eq 0
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;; lods dword ptr ds:[esi]
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mov eax,dword ptr ds:[esi]
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add esi,4
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else
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ror eax,8
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endif
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LODSB32_N = LODSB32_N + 1
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endm
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;--------------------------------------------------------------------------;
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;
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; MAP16
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;
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;--------------------------------------------------------------------------;
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MAP16 macro n
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if n and 1
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shr ebx,16 ; get pel from last time
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else
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mov ebx, dword ptr ds:[esi] ; grab two pels
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add esi,4
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endif
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;
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; BX contains 5:5:5 RGB convert it to a 8:8:8 RGB
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;
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mov al,bl
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shl al,3
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STOSB32
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shr bx,2
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mov al,bl
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and al,0F8h
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STOSB32
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mov al,bh
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shl al,3
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STOSB32
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endm
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;--------------------------------------------------------------------------;
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;
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; Map16to24()
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;
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; Entry:
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; Stack based parameters as described below.
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;
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; Returns:
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; none
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;
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; Registers Preserved:
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; DS,ES,ESI,EDI,EBP
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;
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;--------------------------------------------------------------------------;
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assumes ds,Data
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assumes es,nothing
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cProc Map16to24,<FAR,PUBLIC,PASCAL>,<>
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parmD biDst ;--> BITMAPINFO of dest
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parmD lpDst ;--> to destination bits
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parmW DstX ;Destination origin - x coordinate
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parmW DstY ;Destination origin - y coordinate
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parmW DstXE ;x extent of the BLT
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parmW DstYE ;y extent of the BLT
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parmD biSrc ;--> BITMAPINFO of source
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parmD lpSrc ;--> to source bits
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parmW SrcX ;Source origin - x coordinate
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parmW SrcY ;Source origin - y coordinate
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parmD lpDitherTable ;not used
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localD SrcWidth ;width of source in bytes
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localD DstWidth ;width of dest in bytes
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localD SrcInc
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localD DstInc
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cBegin
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push esi
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push edi
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push ds
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; - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ;
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; align everything on four pixel boundries, we realy should
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; not do this but should handle the general case instead,
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; but hey we are hackers.
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; - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ;
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and DstXE, not 011b
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; - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ;
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mov eax,16 ; source 16
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mov ebx,24 ; dest 24
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call map_init ; init all the frame variables
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jc Map16to24Exit
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movzx eax, DstXE ; inner loop expanded by 4
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shr eax, 2
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jz Map16to24Exit
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mov DstXE,ax
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; - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ;
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; - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ;
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align 4
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Outer16to24Loop:
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movzx ecx,DstXE
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align 4
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Inner16to24Loop:
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MAP16 0
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MAP16 1
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MAP16 2
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MAP16 3
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dec ecx
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jnz Inner16to24Loop
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add edi, DstInc
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add esi, SrcInc
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dec DstYE
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jnz Outer16to24Loop
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; - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ;
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; - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ;
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Map16to24Exit:
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pop ds
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pop edi
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pop esi
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cEnd
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;--------------------------------------------------------------------------;
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;
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; Map32to24()
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;
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; Entry:
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; Stack based parameters as described below.
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;
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; Returns:
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; none
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;
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; Registers Preserved:
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; DS,ES,ESI,EDI,EBP
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;
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;--------------------------------------------------------------------------;
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assumes ds,Data
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assumes es,nothing
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cProc Map32to24,<FAR,PUBLIC,PASCAL>,<>
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parmD biDst ;--> BITMAPINFO of dest
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parmD lpDst ;--> to destination bits
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parmW DstX ;Destination origin - x coordinate
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parmW DstY ;Destination origin - y coordinate
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parmW DstXE ;x extent of the BLT
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parmW DstYE ;y extent of the BLT
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parmD biSrc ;--> BITMAPINFO of source
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parmD lpSrc ;--> to source bits
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parmW SrcX ;Source origin - x coordinate
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parmW SrcY ;Source origin - y coordinate
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parmD lpDitherTable ;not used
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localD SrcWidth ;width of source in bytes
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localD DstWidth ;width of dest in bytes
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localD SrcInc
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localD DstInc
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localW OriginalDstXE
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cBegin
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push esi
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push edi
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push ds
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; - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ;
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; align everything on four pixel boundries, we realy should
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; not do this but should handle the general case instead,
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; but hey we are hackers.
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; - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ;
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mov ax, DstXE
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mov OriginalDstXE, ax
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mov bx, ax
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add ax, 011b
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and ax, not 011b
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mov DstXE, ax
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and bx, 011b
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jz short @f
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dec DstYE ; if the width isn't a multiple of 4, special-
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; case the last line.
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@@:
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; - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ;
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mov eax,32 ; source 32
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mov ebx,24 ; dest 24
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call map_init ; init all the frame variables
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jc Map32to24Exit
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movzx eax, DstXE ; inner loop expanded by 4
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shr eax, 2
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jz short Map32to24Exit
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mov DstXE,ax
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; - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ;
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; - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ;
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align 4
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Outer32to24Loop:
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movzx ecx,DstXE
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align 4
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Inner32to24Loop:
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mov eax,[esi] ; eax = XRGB
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mov ebx,[esi+4] ; ebx = xrgb
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shl eax,8 ; eax = RGB0
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shrd eax,ebx,8 ; eax = bRGB
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mov es:[edi],eax ; store pels
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shl ebx,8 ; ebx = rgb0
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mov eax,[esi+8] ; eax = XRGB
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shrd ebx,eax,16 ; ebx = GBrg
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mov es:[edi+4],ebx ; store pels
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shl eax,8 ; eax = RGB0
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mov ebx,[esi+12] ; ebx = xrgb
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shrd eax,ebx,24 ; eax = rgbR
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mov es:[edi+8],eax ; store pels
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add esi,16
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add edi,12
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dec ecx
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jnz Inner32to24Loop
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add edi, DstInc
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add esi, SrcInc
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dec DstYE
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jnz Outer32to24Loop
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; done, but might have to do one more scan line
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mov ax, OriginalDstXE
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and ax, 011b
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jz short Map32to24Exit
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movzx ecx,OriginalDstXE
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align 4
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@@: ; one more scan line to do....
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mov eax,[esi] ; eax = XRGB
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shl eax,8 ; eax = RGB0
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mov es:[edi], ah
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shr eax,16 ; eax = 00RG
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mov es:[edi+1], ax
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add esi,4
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add edi,3
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dec ecx
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jnz @b
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; - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ;
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; - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ;
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Map32to24Exit:
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pop ds
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pop edi
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pop esi
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cEnd
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;--------------------------------------------------------------------------;
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;
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; map_init
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;
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; init local frame vars for mapDIB
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;
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; ENTRY:
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; AX - source bpp
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; BX - dest bpp
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; ss:bp --> mapdib frame
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;
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; EXIT:
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; DS:ESI --> source DIB start x,y
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; ES:EDI --> dest DIB start x,y
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;
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;--------------------------------------------------------------------------;
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map_init_error:
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stc
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ret
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map_init proc near
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; - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ;
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; validate the DIBs
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; - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ;
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xor edi,edi
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xor esi,esi
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lds si, biSrc
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les di, biDst
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movzx ecx, es:[di].biBitCount ; dest must be right
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cmp cx, bx
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jne map_init_error
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mov cx, [si].biBitCount ; source must be 16
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cmp cx, ax
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jne map_init_error
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map_init_bit_depth_ok:
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; - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ;
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;
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; Set up the initial source pointer
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;
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; - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ;
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mov eax,[si].biWidth
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mul ecx
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add eax,31
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and eax,not 31
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shr eax,3
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mov SrcWidth,eax
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mov SrcInc,eax
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lds si,lpSrc
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movzx edx,SrcY
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mul edx
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add esi,eax
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movzx eax,SrcX
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mul ecx
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shr eax,3
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add esi,eax
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movzx eax, DstXE ; SrcInc = SrcWidth - DstXE*bits/8
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mul ecx
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shr eax, 3
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sub SrcInc, eax
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; - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ;
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;
|
||
|
|
; Set up the initial dest pointer
|
||
|
|
;
|
||
|
|
; - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ;
|
||
|
|
movzx ecx, es:[di].biBitCount
|
||
|
|
mov eax,es:[di].biWidth
|
||
|
|
mul ecx
|
||
|
|
add eax,31
|
||
|
|
and eax,not 31
|
||
|
|
shr eax,3
|
||
|
|
mov DstWidth,eax
|
||
|
|
mov DstInc,eax
|
||
|
|
|
||
|
|
les di,lpDst
|
||
|
|
|
||
|
|
movzx edx,DstY
|
||
|
|
mul edx
|
||
|
|
add edi,eax
|
||
|
|
|
||
|
|
movzx eax,DstX
|
||
|
|
mul ecx
|
||
|
|
shr eax,3
|
||
|
|
add edi,eax
|
||
|
|
|
||
|
|
movzx eax, DstXE ; DstInc = DstWidth - DstXE*bits/8
|
||
|
|
mul ecx
|
||
|
|
shr eax, 3
|
||
|
|
sub DstInc, eax
|
||
|
|
|
||
|
|
; - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ;
|
||
|
|
; - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ;
|
||
|
|
|
||
|
|
map_init_exit:
|
||
|
|
clc
|
||
|
|
ret
|
||
|
|
|
||
|
|
map_init endp
|
||
|
|
|
||
|
|
;--------------------------------------------------------------------------;
|
||
|
|
;
|
||
|
|
; HugeToFlat
|
||
|
|
;
|
||
|
|
; map a bunch of bitmap bits in "huge" format to "flat" format
|
||
|
|
;
|
||
|
|
; this code only works for bitmaps <= 128k
|
||
|
|
;
|
||
|
|
; Entry:
|
||
|
|
; Stack based parameters as described below.
|
||
|
|
;
|
||
|
|
; Returns:
|
||
|
|
; none
|
||
|
|
;
|
||
|
|
; Registers Preserved:
|
||
|
|
; DS,ES,ESI,EDI,EBP
|
||
|
|
;
|
||
|
|
;--------------------------------------------------------------------------;
|
||
|
|
assumes ds,nothing
|
||
|
|
assumes es,nothing
|
||
|
|
|
||
|
|
cProc HugeToFlat,<FAR,PUBLIC,PASCAL>,<>
|
||
|
|
parmD lpBits ;--> bits
|
||
|
|
parmD cbBits ;count of bits.
|
||
|
|
parmD FillBytes ;the fill bytes
|
||
|
|
cBegin
|
||
|
|
push esi
|
||
|
|
push edi
|
||
|
|
push ds
|
||
|
|
|
||
|
|
mov ax,word ptr lpBits[2]
|
||
|
|
mov ds,ax
|
||
|
|
mov es,ax
|
||
|
|
mov eax,FillBytes
|
||
|
|
mov ecx,cbBits
|
||
|
|
add ecx,eax
|
||
|
|
mov esi,00010000h
|
||
|
|
sub ecx,esi
|
||
|
|
mov edi,esi
|
||
|
|
sub edi,eax
|
||
|
|
|
||
|
|
shr ecx,2
|
||
|
|
rep movsd
|
||
|
|
|
||
|
|
pop ds
|
||
|
|
pop edi
|
||
|
|
pop esi
|
||
|
|
cEnd
|
||
|
|
|
||
|
|
;--------------------------------------------------------------------------;
|
||
|
|
;
|
||
|
|
; FlatToHuge
|
||
|
|
;
|
||
|
|
; map a bunch of bitmap bits in "flat" format to "huge" format
|
||
|
|
;
|
||
|
|
; this code only works for bitmaps <= 128k
|
||
|
|
;
|
||
|
|
; Entry:
|
||
|
|
; Stack based parameters as described below.
|
||
|
|
;
|
||
|
|
; Returns:
|
||
|
|
; none
|
||
|
|
;
|
||
|
|
; Registers Preserved:
|
||
|
|
; DS,ES,ESI,EDI,EBP
|
||
|
|
;
|
||
|
|
;--------------------------------------------------------------------------;
|
||
|
|
assumes ds,Data
|
||
|
|
assumes es,nothing
|
||
|
|
|
||
|
|
cProc FlatToHuge,<FAR,PUBLIC,PASCAL>,<>
|
||
|
|
parmD lpBits ;--> bits
|
||
|
|
parmD cbBits ;count of bits.
|
||
|
|
parmD FillBytes ;the fill bytes
|
||
|
|
cBegin
|
||
|
|
push esi
|
||
|
|
push edi
|
||
|
|
push ds
|
||
|
|
|
||
|
|
mov ax,word ptr lpBits[2]
|
||
|
|
mov ds,ax
|
||
|
|
mov es,ax
|
||
|
|
mov eax,FillBytes
|
||
|
|
mov ecx,cbBits
|
||
|
|
add ecx,eax
|
||
|
|
mov edi,ecx
|
||
|
|
sub edi,4
|
||
|
|
mov esi,edi
|
||
|
|
sub esi,FillBytes
|
||
|
|
sub ecx,00010000h
|
||
|
|
|
||
|
|
std
|
||
|
|
shr ecx,2
|
||
|
|
rep movsd
|
||
|
|
cld
|
||
|
|
|
||
|
|
pop ds
|
||
|
|
pop edi
|
||
|
|
pop esi
|
||
|
|
cEnd
|
||
|
|
|
||
|
|
sEnd CodeSeg
|
||
|
|
|
||
|
|
end
|