384 lines
10 KiB
NASM
384 lines
10 KiB
NASM
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page ,132
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;----------------------------Module-Header------------------------------;
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; Module Name: SETDI8.ASM
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;
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; move bits from one DIB format into another. doing color conversion if
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; needed.
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;
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; convert_8_8
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; convert_16_8
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; convert_24_8
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; convert_32_8
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; copy_8_8
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; dither_8_8
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;
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; NOTES:
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;
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; dither needs to work!
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;
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; AUTHOR: ToddLa (Todd Laney) Microsoft
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;
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;-----------------------------------------------------------------------;
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?PLM=1
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?WIN=0
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.xlist
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include cmacro32.inc
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; include cmacros.inc
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include windows.inc
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.list
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sBegin Data
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sEnd Data
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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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nxtscan macro reg, next_scan, fill_bytes
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ifb <fill_bytes>
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add e®,next_scan
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else
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mov eax,e®
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add e®,next_scan
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cmp ax,reg
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sbb eax,eax
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and eax,fill_bytes
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add e®,eax
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endif
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endm
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;--------------------------------------------------------------------------;
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;
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; convert_8_8
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;
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;--------------------------------------------------------------------------;
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assumes ds,nothing
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assumes es,nothing
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cProc convert_8_8,<FAR,PUBLIC,PASCAL>,<esi,edi,ds>
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ParmD dst_ptr ; --> dst.
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ParmD dst_offset ; offset to start at
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ParmD dst_next_scan ; dst_next_scan.
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ParmD dst_fill_bytes ; dst_fill_bytes
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ParmD src_ptr ; --> src.
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ParmD src_offset ; offset to start at
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ParmD src_next_scan ; dst_next_scan.
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ParmD pel_count ; pixel count.
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ParmD scan_count ; scan count.
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ParmD xlat_table ; pixel convert table.
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cBegin
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xor esi,esi
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xor edi,edi
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xor ebx,ebx
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lfs si,src_ptr
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les di,dst_ptr
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lds bx,xlat_table
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add esi,src_offset
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add edi,dst_offset
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mov eax,pel_count
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sub src_next_scan,eax
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sub dst_next_scan,eax
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mov edx,pel_count
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xor ebx,ebx
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align 4
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convert_8_8_start:
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mov ecx,edx ;pel_count
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shr ecx,2
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jz short convert_8_8_ack
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align 4
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convert_8_8_loop:
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mov eax,fs:[esi] ; grab 4 pixels
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mov bl,al ; get pel
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mov al,[ebx] ; translate pel
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mov bl,ah ; get pel
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mov ah,[ebx] ; translate pel
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rol eax,16
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mov bl,al ; get pel
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mov al,[ebx] ; translate pel
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mov bl,ah ; get pel
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mov ah,[ebx] ; translate pel
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rol eax,16
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mov es:[edi],eax ; store four
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add esi,4
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add edi,4
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dec ecx
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jnz short convert_8_8_loop
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convert_8_8_ack:
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mov ecx,edx ;pel_count
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and ecx,3
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jnz short convert_8_8_odd
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convert_8_8_next:
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nxtscan si,src_next_scan
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nxtscan di,dst_next_scan,dst_fill_bytes
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dec scan_count
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jnz short convert_8_8_start
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cEnd
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convert_8_8_odd:
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@@: mov bl,fs:[esi]
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mov bl,[ebx]
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mov es:[edi],bl
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inc esi
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inc edi
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dec ecx
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jnz short convert_8_8_odd
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jz short convert_8_8_next
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;--------------------------------------------------------------------------;
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;
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; copy_8_8
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;
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;--------------------------------------------------------------------------;
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assumes ds,nothing
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assumes es,nothing
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cProc copy_8_8,<FAR,PUBLIC,PASCAL>,<esi,edi,ds>
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ParmD dst_ptr ; --> dst.
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ParmD dst_offset ; offset to start at
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ParmD dst_next_scan ; dst_next_scan.
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ParmD dst_fill_bytes ; dst_fill_bytes
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ParmD src_ptr ; --> src.
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ParmD src_offset ; offset to start at
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ParmD src_next_scan ; dst_next_scan.
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ParmD pel_count ; pixel count.
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ParmD scan_count ; scan count.
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ParmD xlat_table ; pixel convert table.
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cBegin
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xor esi,esi
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xor edi,edi
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lds si,src_ptr
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les di,dst_ptr
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add esi,src_offset
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add edi,dst_offset
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mov eax,pel_count
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sub src_next_scan,eax
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sub dst_next_scan,eax
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mov eax,src_next_scan
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or eax,dst_next_scan
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or eax,dst_fill_bytes
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jz short copy_8_8_all
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copy_8_8_rect:
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mov ebx,pel_count
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mov edx,ebx
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shr ebx,2
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and edx,3
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align 4
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copy_8_8_start:
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mov ecx,ebx
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rep movs dword ptr es:[edi], dword ptr ds:[esi]
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mov ecx,edx
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rep movs byte ptr es:[edi], byte ptr ds:[esi]
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nxtscan si,src_next_scan
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nxtscan di,dst_next_scan,dst_fill_bytes
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dec scan_count
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jnz short copy_8_8_start
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copy_8_8_exit:
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cEnd
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copy_8_8_all:
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mov eax,pel_count
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mul scan_count
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mov ecx,eax
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shr ecx,2
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rep movs dword ptr es:[edi], dword ptr ds:[esi]
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mov ecx,eax
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and ecx,3
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rep movs byte ptr es:[edi], byte ptr ds:[esi]
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jmp short copy_8_8_exit
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;--------------------------------------------------------------------------;
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;
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; dither_8_8
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;
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; pel = xlat[y&7][pel][x&7]
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;
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;--------------------------------------------------------------------------;
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assumes ds,nothing
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assumes es,nothing
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cProc dither_8_8,<FAR,PUBLIC,PASCAL>,<esi,edi,ds>
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ParmD dst_ptr ; --> dst.
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ParmD dst_offset ; offset to start at
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ParmD dst_next_scan ; dst_next_scan.
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ParmD dst_fill_bytes ; dst_fill_bytes
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ParmD src_ptr ; --> src.
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ParmD src_offset ; offset to start at
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ParmD src_next_scan ; dst_next_scan.
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ParmD pel_count ; pixel count.
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ParmD scan_count ; scan count.
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ParmD xlat_table ; pixel convert table.
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cBegin
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xor esi,esi
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xor edi,edi
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xor ebx,ebx
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lfs si,src_ptr
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les di,dst_ptr
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lds bx,xlat_table
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ifdef DEBUG
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or ebx,ebx
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jz @f
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int 3
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@@:
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endif
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add esi,src_offset
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add edi,dst_offset
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and pel_count,not 3 ;;!!! round down to multiple of 4
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mov eax,pel_count
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sub src_next_scan,eax
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sub dst_next_scan,eax
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shr eax,2
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jz short dither_8_8_exit
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mov pel_count,eax
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xor edx,edx ; y = 0
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align 4
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dither_8_8_start:
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mov ecx,pel_count
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xor ebx,ebx ; x = 0
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align 4
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dither_8_8_loop:
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mov eax,fs:[esi] ; grab 4 pixels
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mov dl,al ; get pel
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mov al,[edx*8+ebx] ; get dithered version of the pixel.
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inc bl
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mov dl,ah ; get pel
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mov ah,[edx*8+ebx] ; get dithered version of the pixel.
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inc bl
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rol eax,16
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mov dl,al ; get pel
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mov al,[edx*8+ebx] ; get dithered version of the pixel.
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inc bl
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mov dl,ah ; get pel
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mov ah,[edx*8+ebx] ; get dithered version of the pixel.
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inc bl
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and bl,7
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rol eax,16
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mov es:[edi],eax
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add esi,4
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add edi,4
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dec ecx
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jnz short dither_8_8_loop
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dither_8_8_next:
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inc dh
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and dh,7
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nxtscan si,src_next_scan
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nxtscan di,dst_next_scan,dst_fill_bytes
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dec scan_count
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jnz short dither_8_8_start
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dither_8_8_exit:
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cEnd
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;--------------------------------------------------------------------------;
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;
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; convert_16_8
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;
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;--------------------------------------------------------------------------;
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assumes ds,nothing
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assumes es,nothing
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cProc convert_16_8,<FAR,PUBLIC,PASCAL>,<esi,edi,ds>
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ParmD dst_ptr ; --> dst.
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ParmD dst_offset ; offset to start at
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ParmD dst_next_scan ; dst_next_scan.
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ParmD dst_fill_bytes ; dst_fill_bytes
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ParmD src_ptr ; --> src.
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ParmD src_offset ; offset to start at
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ParmD src_next_scan ; dst_next_scan.
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ParmD pel_count ; pixel count.
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ParmD scan_count ; scan count.
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ParmD xlat_table ; pixel convert table.
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cBegin
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; we need dither code here!
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cEnd
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;--------------------------------------------------------------------------;
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;
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; convert_24_8
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;
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;--------------------------------------------------------------------------;
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assumes ds,nothing
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assumes es,nothing
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cProc convert_24_8,<FAR,PUBLIC,PASCAL>,<esi,edi,ds>
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ParmD dst_ptr ; --> dst.
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ParmD dst_offset ; offset to start at
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ParmD dst_next_scan ; dst_next_scan.
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ParmD dst_fill_bytes ; dst_fill_bytes
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ParmD src_ptr ; --> src.
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ParmD src_offset ; offset to start at
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ParmD src_next_scan ; dst_next_scan.
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ParmD pel_count ; pixel count.
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ParmD scan_count ; scan count.
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ParmD xlat_table ; pixel convert table.
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cBegin
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; we need dither code here!
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cEnd
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;--------------------------------------------------------------------------;
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;
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; convert_32_8
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;
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;--------------------------------------------------------------------------;
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assumes ds,nothing
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assumes es,nothing
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cProc convert_32_8,<FAR,PUBLIC,PASCAL>,<esi,edi,ds>
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ParmD dst_ptr ; --> dst.
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ParmD dst_offset ; offset to start at
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ParmD dst_next_scan ; dst_next_scan.
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ParmD dst_fill_bytes ; dst_fill_bytes
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ParmD src_ptr ; --> src.
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ParmD src_offset ; offset to start at
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ParmD src_next_scan ; dst_next_scan.
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ParmD pel_count ; pixel count.
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ParmD scan_count ; scan count.
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ParmD xlat_table ; pixel convert table.
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cBegin
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; we need dither code here!
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cEnd
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sEnd CodeSeg
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end
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