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;*
;* tmap.nas
;* The texture-mapping inner loops in pure assembly language.
;*
;*---------------------------------------------------------------------------
;* Copyright 1998-2006 Randy Heit
;* All rights reserved.
;*
;* Redistribution and use in source and binary forms, with or without
;* modification, are permitted provided that the following conditions
;* are met:
;*
;* 1. Redistributions of source code must retain the above copyright
;* notice, this list of conditions and the following disclaimer.
;* 2. Redistributions in binary form must reproduce the above copyright
;* notice, this list of conditions and the following disclaimer in the
;* documentation and/or other materials provided with the distribution.
;* 3. The name of the author may not be used to endorse or promote products
;* derived from this software without specific prior written permission.
;*
;* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
;* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
;* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
;* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
;* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
;* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
;* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
;* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
;* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
;* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
;*---------------------------------------------------------------------------
;*
BITS 32
; Segment/section definition macros.
SECTION .data
%define SPACEFILLER4 (0x44444444)
; If you change this in r_draw.c, be sure to change it here, too!
FUZZTABLE equ 50
%ifndef M_TARGET_LINUX
%define ylookup _ylookup
%define centery _centery
%define fuzzpos _fuzzpos
%define fuzzoffset _fuzzoffset
%define NormalLight _NormalLight
%define realviewheight _realviewheight
%define fuzzviewheight _fuzzviewheight
%define CPU _CPU
%define dc_pitch _dc_pitch
%define dc_colormap _dc_colormap
%define dc_color _dc_color
%define dc_iscale _dc_iscale
%define dc_texturefrac _dc_texturefrac
%define dc_srcblend _dc_srcblend
%define dc_destblend _dc_destblend
%define dc_source _dc_source
%define dc_yl _dc_yl
%define dc_yh _dc_yh
%define dc_x _dc_x
%define dc_count _dc_count
%define dc_dest _dc_dest
%define dc_destorg _dc_destorg
%define Col2RGB8 _Col2RGB8
%define RGB32k _RGB32k
%define dc_ctspan _dc_ctspan
%define dc_temp _dc_temp
%define ds_xstep _ds_xstep
%define ds_ystep _ds_ystep
%define ds_colormap _ds_colormap
%define ds_source _ds_source
%define ds_x1 _ds_x1
%define ds_x2 _ds_x2
%define ds_xfrac _ds_xfrac
%define ds_yfrac _ds_yfrac
%define ds_y _ds_y
%define ds_cursource _ds_cursource
%define ds_curcolormap _ds_curcolormap
%define R_SetSpanSource_ASM _R_SetSpanSource_ASM
%define R_SetSpanSize_ASM _R_SetSpanSize_ASM
%define R_SetSpanColormap_ASM _R_SetSpanColormap_ASM
%define R_SetupShadedCol _R_SetupShadedCol
%define R_SetupAddCol _R_SetupAddCol
%define R_SetupAddClampCol _R_SetupAddClampCol
%endif
EXTERN ylookup
EXTERN centery
EXTERN fuzzpos
EXTERN fuzzoffset
EXTERN NormalLight
EXTERN realviewheight
EXTERN fuzzviewheight
EXTERN CPU
EXTERN dc_pitch
EXTERN dc_colormap
EXTERN dc_color
EXTERN dc_iscale
EXTERN dc_texturefrac
EXTERN dc_srcblend
EXTERN dc_destblend
EXTERN dc_source
EXTERN dc_yl
EXTERN dc_yh
EXTERN dc_x
EXTERN dc_count
EXTERN dc_dest
EXTERN dc_destorg
EXTERN dc_ctspan
EXTERN dc_temp
EXTERN Col2RGB8
EXTERN RGB32k
EXTERN ds_xstep
EXTERN ds_ystep
EXTERN ds_colormap
EXTERN ds_source
EXTERN ds_x1
EXTERN ds_x2
EXTERN ds_xfrac
EXTERN ds_yfrac
EXTERN ds_y
GLOBAL ds_cursource
GLOBAL ds_curcolormap
ds_cursource:
DD 0
ds_curcolormap:
DD 0
; Local stuff:
lastAddress DD 0
pixelcount DD 0
SECTION .text
GLOBAL @R_SetSpanSource_ASM@4
GLOBAL R_SetSpanSource_ASM
R_SetSpanSource_ASM:
mov ecx,[esp+4]
@R_SetSpanSource_ASM@4:
mov [spreada+2],ecx
mov [spreadb+2],ecx
mov [spreadc+2],ecx
mov [spreadd+2],ecx
mov [spreade+2],ecx
mov [spreadf+2],ecx
mov [spreadg+2],ecx
mov [mspreada+2],ecx
mov [mspreadb+2],ecx
mov [mspreadc+2],ecx
mov [mspreadd+2],ecx
mov [mspreade+2],ecx
mov [mspreadf+2],ecx
mov [mspreadg+2],ecx
mov [ds_cursource],ecx
ret
GLOBAL @R_SetSpanColormap_ASM@4
GLOBAL R_SetSpanColormap_ASM
R_SetSpanColormap_ASM:
mov ecx,[esp+4]
@R_SetSpanColormap_ASM@4:
mov [spmapa+2],ecx
mov [spmapb+2],ecx
mov [spmapc+2],ecx
mov [spmapd+2],ecx
mov [spmape+2],ecx
mov [spmapf+2],ecx
mov [spmapg+2],ecx
mov [mspmapa+2],ecx
mov [mspmapb+2],ecx
mov [mspmapc+2],ecx
mov [mspmapd+2],ecx
mov [mspmape+2],ecx
mov [mspmapf+2],ecx
mov [mspmapg+2],ecx
mov [ds_curcolormap],ecx
ret
GLOBAL R_SetSpanSize_ASM
EXTERN SetTiltedSpanSize
R_SetSpanSize_ASM:
mov edx,[esp+4]
mov ecx,[esp+8]
call SetTiltedSpanSize
mov [dsy1+2],dl
mov [dsy2+2],dl
mov [dsx1+2],cl
mov [dsx2+2],cl
mov [dsx3+2],cl
mov [dsx4+2],cl
mov [dsx5+2],cl
mov [dsx6+2],cl
mov [dsx7+2],cl
mov [dmsy1+2],dl
mov [dmsy2+2],dl
mov [dmsx1+2],cl
mov [dmsx2+2],cl
mov [dmsx3+2],cl
mov [dmsx4+2],cl
mov [dmsx5+2],cl
mov [dmsx6+2],cl
mov [dmsx7+2],cl
push ecx
add ecx,edx
mov eax,1
shl eax,cl
dec eax
mov [dsm1+2],eax
mov [dsm5+1],eax
mov [dsm6+1],eax
mov [dsm7+1],eax
mov [dmsm1+2],eax
mov [dmsm5+1],eax
mov [dmsm6+1],eax
mov [dmsm7+1],eax
pop ecx
ror eax,cl
mov [dsm2+2],eax
mov [dsm3+2],eax
mov [dsm4+2],eax
mov [dmsm2+2],eax
mov [dmsm3+2],eax
mov [dmsm4+2],eax
and eax,0xffff
not eax
mov [dsm8+2],eax
mov [dsm9+2],eax
mov [dmsm8+2],eax
mov [dmsm9+2],eax
neg dl
mov [dsy3+2],dl
mov [dsy4+2],dl
mov [dmsy3+2],dl
mov [dmsy4+2],dl
aret: ret
SECTION .rtext progbits alloc exec write align=64
GLOBAL @R_DrawSpanP_ASM@0
GLOBAL _R_DrawSpanP_ASM
GLOBAL R_DrawSpanP_ASM
; eax: scratch
; ebx: zero
; ecx: yfrac at top end, xfrac int part at low end
; edx: xfrac frac part at top end
; edi: dest
; ebp: scratch
; esi: count
align 16
@R_DrawSpanP_ASM@0:
_R_DrawSpanP_ASM:
R_DrawSpanP_ASM:
mov eax,[ds_x2]
mov ecx,[ds_x1]
sub eax,ecx
jl near rdspret ; count < 0: nothing to do, so leave
push ebx
push edi
push ebp
push esi
mov edi,ecx
add edi,[dc_destorg]
mov ecx,[ds_y]
add edi,[ylookup+ecx*4]
mov edx,[ds_xstep]
dsy1: shl edx,6
mov ebp,[ds_xstep]
dsy3: shr ebp,26
xor ebx,ebx
lea esi,[eax+1]
mov [ds_xstep],edx
mov edx,[ds_ystep]
mov ecx,[ds_xfrac]
dsy4: shr ecx,26
dsm8: and edx,0xffffffc0
or ebp,edx
mov [ds_ystep],ebp
mov ebp,[ds_yfrac]
mov edx,[ds_xfrac]
dsy2: shl edx,6
dsm9: and ebp,0xffffffc0
or ecx,ebp
shr esi,1
jnc dseven1
; do odd pixel
mov ebp,ecx
dsx1: rol ebp,6
dsm1: and ebp,0xfff
add edx,[ds_xstep]
adc ecx,[ds_ystep]
spreada mov bl,[ebp+SPACEFILLER4]
spmapa mov bl,[ebx+SPACEFILLER4]
mov [edi],bl
inc edi
dseven1 shr esi,1
jnc dsrest
; do two more pixels
mov ebp,ecx
add edx,[ds_xstep]
adc ecx,[ds_ystep]
dsm2: and ebp,0xfc00003f
dsx2: rol ebp,6
mov eax,ecx
add edx,[ds_xstep]
adc ecx,[ds_ystep]
spreadb mov bl,[ebp+SPACEFILLER4] ;read texel1
dsx3: rol eax,6
dsm6: and eax,0xfff
spmapb mov bl,[ebx+SPACEFILLER4] ;map texel1
mov [edi],bl ;store texel1
add edi,2
spreadc mov bl,[eax+SPACEFILLER4] ;read texel2
spmapc mov bl,[ebx+SPACEFILLER4] ;map texel2
mov [edi-1],bl ;store texel2
; do the rest
dsrest test esi,esi
jz near dsdone
align 16
dsloop mov ebp,ecx
spstep1d add edx,[ds_xstep]
spstep2d adc ecx,[ds_ystep]
dsm3: and ebp,0xfc00003f
dsx4: rol ebp,6
mov eax,ecx
spstep1e add edx,[ds_xstep]
spstep2e adc ecx,[ds_ystep]
spreadd mov bl,[ebp+SPACEFILLER4] ;read texel1
dsx5: rol eax,6
dsm5: and eax,0xfff
spmapd mov bl,[ebx+SPACEFILLER4] ;map texel1
mov [edi],bl ;store texel1
mov ebp,ecx
spreade mov bl,[eax+SPACEFILLER4] ;read texel2
spstep1f add edx,[ds_xstep]
spstep2f adc ecx,[ds_ystep]
dsm4: and ebp,0xfc00003f
dsx6: rol ebp,6
spmape mov bl,[ebx+SPACEFILLER4] ;map texel2
mov eax,ecx
mov [edi+1],bl ;store texel2
spreadf mov bl,[ebp+SPACEFILLER4] ;read texel3
spmapf mov bl,[ebx+SPACEFILLER4] ;map texel3
add edi,4
dsx7: rol eax,6
dsm7: and eax,0xfff
mov [edi-2],bl ;store texel3
spreadg mov bl,[eax+SPACEFILLER4] ;read texel4
spstep1g add edx,[ds_xstep]
spstep2g adc ecx,[ds_ystep]
spmapg mov bl,[ebx+SPACEFILLER4] ;map texel4
dec esi
mov [edi-1],bl ;store texel4
jnz near dsloop
dsdone pop esi
pop ebp
pop edi
pop ebx
rdspret ret
; This is the same as the previous routine, except it doesn't draw pixels
; where the texture's color value is 0.
GLOBAL @R_DrawSpanMaskedP_ASM@0
GLOBAL _R_DrawSpanMaskedP_ASM
GLOBAL R_DrawSpanMaskedP_ASM
; eax: scratch
; ebx: zero
; ecx: yfrac at top end, xfrac int part at low end
; edx: xfrac frac part at top end
; edi: dest
; ebp: scratch
; esi: count
align 16
@R_DrawSpanMaskedP_ASM@0:
_R_DrawSpanMaskedP_ASM:
R_DrawSpanMaskedP_ASM:
mov eax,[ds_x2]
mov ecx,[ds_x1]
sub eax,ecx
jl rdspret ; count < 0: nothing to do, so leave
push ebx
push edi
push ebp
push esi
mov edi,ecx
add edi,[dc_destorg]
mov ecx,[ds_y]
add edi,[ylookup+ecx*4]
mov edx,[ds_xstep]
dmsy1: shl edx,6
mov ebp,[ds_xstep]
dmsy3: shr ebp,26
xor ebx,ebx
lea esi,[eax+1]
mov [ds_xstep],edx
mov edx,[ds_ystep]
mov ecx,[ds_xfrac]
dmsy4: shr ecx,26
dmsm8: and edx,0xffffffc0
or ebp,edx
mov [ds_ystep],ebp
mov ebp,[ds_yfrac]
mov edx,[ds_xfrac]
dmsy2: shl edx,6
dmsm9: and ebp,0xffffffc0
or ecx,ebp
shr esi,1
jnc dmseven1
; do odd pixel
mov ebp,ecx
dmsx1: rol ebp,6
dmsm1: and ebp,0xfff
add edx,[ds_xstep]
adc ecx,[ds_ystep]
mspreada mov bl,[ebp+SPACEFILLER4]
cmp bl,0
je mspskipa
mspmapa mov bl,[ebx+SPACEFILLER4]
mov [edi],bl
mspskipa: inc edi
dmseven1 shr esi,1
jnc dmsrest
; do two more pixels
mov ebp,ecx
add edx,[ds_xstep]
adc ecx,[ds_ystep]
dmsm2: and ebp,0xfc00003f
dmsx2: rol ebp,6
mov eax,ecx
add edx,[ds_xstep]
adc ecx,[ds_ystep]
mspreadb mov bl,[ebp+SPACEFILLER4] ;read texel1
dmsx3: rol eax,6
dmsm6: and eax,0xfff
cmp bl,0
je mspskipb
mspmapb mov bl,[ebx+SPACEFILLER4] ;map texel1
mov [edi],bl ;store texel1
mspskipb add edi,2
mspreadc mov bl,[eax+SPACEFILLER4] ;read texel2
cmp bl,0
je dmsrest
mspmapc mov bl,[ebx+SPACEFILLER4] ;map texel2
mov [edi-1],bl ;store texel2
; do the rest
dmsrest test esi,esi
jz near dmsdone
align 16
dmsloop mov ebp,ecx
mspstep1d add edx,[ds_xstep]
mspstep2d adc ecx,[ds_ystep]
dmsm3: and ebp,0xfc00003f
dmsx4: rol ebp,6
mov eax,ecx
mspstep1e add edx,[ds_xstep]
mspstep2e adc ecx,[ds_ystep]
mspreadd mov bl,[ebp+SPACEFILLER4] ;read texel1
dmsx5: rol eax,6
dmsm5: and eax,0xfff
cmp bl,0
mov ebp,ecx
je mspreade
mspmapd mov bl,[ebx+SPACEFILLER4] ;map texel1
mov [edi],bl ;store texel1
mspreade mov bl,[eax+SPACEFILLER4] ;read texel2
mspstep1f add edx,[ds_xstep]
mspstep2f adc ecx,[ds_ystep]
dmsm4: and ebp,0xfc00003f
dmsx6: rol ebp,6
cmp bl,0
mov eax,ecx
je mspreadf
mspmape mov bl,[ebx+SPACEFILLER4] ;map texel2
mov [edi+1],bl ;store texel2
mspreadf mov bl,[ebp+SPACEFILLER4] ;read texel3
add edi,4
dmsx7: rol eax,6
dmsm7: and eax,0xfff
cmp bl,0
je mspreadg
mspmapf mov bl,[ebx+SPACEFILLER4] ;map texel3
mov [edi-2],bl ;store texel3
mspreadg mov bl,[eax+SPACEFILLER4] ;read texel4
mspstep1g add edx,[ds_xstep]
mspstep2g adc ecx,[ds_ystep]
cmp bl,0
je mspskipg
mspmapg mov bl,[ebx+SPACEFILLER4] ;map texel4
mov [edi-1],bl ;store texel4
mspskipg dec esi
jnz near dmsloop
dmsdone pop esi
pop ebp
pop edi
pop ebx
ret
;*----------------------------------------------------------------------
;*
;* R_DrawColumnP
;*
;*----------------------------------------------------------------------
GLOBAL @R_DrawColumnP_ASM@0
GLOBAL _R_DrawColumnP_ASM
GLOBAL R_DrawColumnP_ASM
align 16
R_DrawColumnP_ASM:
_R_DrawColumnP_ASM:
@R_DrawColumnP_ASM@0:
; count = dc_yh - dc_yl;
mov ecx,[dc_count]
test ecx,ecx
jle near rdcpret ; count <= 0: nothing to do, so leave
push ebp ; save registers
push ebx
push edi
push esi
; dest = ylookup[dc_yl] + dc_x + dc_destorg;
mov edi,[dc_dest]
mov ebp,ecx
mov ebx,[dc_texturefrac] ; ebx = frac
rdcp1: sub edi,SPACEFILLER4
mov ecx,ebx
shr ecx,16
mov esi,[dc_source]
mov edx,[dc_iscale]
mov eax,[dc_colormap]
cmp BYTE [CPU+66],byte 5
jg rdcploop2
; need 12 bytes of filler to make it aligned
db 0x8D,0x80,0,0,0,0 ; lea eax,[eax+00000000]
db 0x8D,0xBF,0,0,0,0 ; lea edi,[edi+00000000]
align 16
; The registers should now look like this:
;
; [31 .. 16][15 .. 8][7 .. 0]
; eax [colormap ]
; ebx [yi ][yf ]
; ecx [scratch ]
; edx [dyi ][dyf ]
; esi [source texture column ]
; edi [destination screen pointer ]
; ebp [counter ]
;
; Note the partial register stalls on anything better than a Pentium
; That's why there are two versions of this loop.
rdcploop:
mov cl,[esi+ecx] ; Fetch texel
xor ch,ch
add ebx,edx ; increment frac
rdcp2: add edi,SPACEFILLER4 ; increment destination pointer
mov cl,[eax+ecx] ; colormap texel
mov [edi],cl ; Store texel
mov ecx,ebx
shr ecx,16
dec ebp
jnz rdcploop ; loop
pop esi
pop edi
pop ebx
pop ebp
rdcpret:
ret
align 16
rdcploop2:
movzx ecx,byte [esi+ecx] ; Fetch texel
add ebx,edx ; increment frac
mov cl,[eax+ecx] ; colormap texel
rdcp3: add edi,SPACEFILLER4 ; increment destination pointer
mov [edi],cl ; Store texel
mov ecx,ebx
shr ecx,16
dec ebp
jnz rdcploop2 ; loop
pop esi
pop edi
pop ebx
pop ebp
ret
;*----------------------------------------------------------------------
;*
;* R_DrawFuzzColumnP
;*
;*----------------------------------------------------------------------
GLOBAL @R_DrawFuzzColumnP_ASM@0
GLOBAL _R_DrawFuzzColumnP_ASM
GLOBAL R_DrawFuzzColumnP_ASM
align 16
R_DrawFuzzColumnP_ASM:
_R_DrawFuzzColumnP_ASM:
@R_DrawFuzzColumnP_ASM@0:
; Adjust borders. Low...
mov eax,[dc_yl]
push ebx
push esi
push edi
push ebp
cmp eax,0
jg .ylok
mov eax,1
nop
; ...and high.
.ylok mov edx,[fuzzviewheight]
mov esi,[dc_yh]
cmp esi,edx
jle .yhok
mov esi,edx
nop
.yhok mov edx,[dc_x]
sub esi,eax ; esi = count
js near .dfcdone ; Zero length (or less)
mov edi,[ylookup+eax*4]
mov ebx,edx
add edi,[dc_destorg]
mov eax,[NormalLight]
mov ecx,[fuzzpos]
add edi,ebx
add eax,256*6
inc esi
mov ebp,[dc_pitch]
mov edx,FUZZTABLE
test ecx,ecx
je .fuzz0
;
; esi = count
; edi = dest
; ecx = fuzzpos
; eax = colormap 6
;
; first loop: end with fuzzpos or count 0, whichever happens first
sub edx,ecx ; edx = # of entries left in fuzzoffset
mov ebx,esi
cmp esi,edx
jle .enuf
mov esi,edx
.enuf sub ebx,esi
mov edx,[fuzzoffset+ecx*4]
push ebx
xor ebx,ebx
.loop1 inc ecx
mov bl,[edi+edx]
dec esi
mov bl,[eax+ebx]
mov [edi],bl
lea edi,[edi+ebp]
mov edx,[fuzzoffset+ecx*4]
jnz .loop1
; second loop: Chunk it into groups of FUZZTABLE-sized spans and do those
pop esi
cmp ecx,FUZZTABLE
jl .savefuzzpos
xor ecx,ecx
nop
.fuzz0 cmp esi,FUZZTABLE
jl .chunked
.oloop lea edx,[esi-FUZZTABLE]
mov esi,FUZZTABLE
push edx
mov edx,[fuzzoffset+ecx*4]
.iloop inc ecx
mov bl,[edi+edx]
dec esi
mov bl,[eax+ebx]
mov [edi],bl
lea edi,[edi+ebp]
mov edx,[fuzzoffset+ecx*4]
jnz .iloop
pop esi
xor ecx,ecx
cmp esi,FUZZTABLE
jge .oloop
; third loop: Do whatever is left
.chunked:
test esi,esi
jle .savefuzzpos
mov edx,[fuzzoffset+ecx*4]
nop
.loop3 inc ecx
mov bl,[edi+edx]
dec esi
mov bl,[eax+ebx]
mov [edi],bl
lea edi,[edi+ebp]
mov edx,[fuzzoffset+ecx*4]
jnz .loop3
.savefuzzpos:
mov [fuzzpos],ecx
.dfcdone:
pop ebp
pop edi
pop esi
pop ebx
ret
;*----------------------------------------------------------------------
;*
;* R_DrawColumnHorizP_ASM
;*
;*----------------------------------------------------------------------
GLOBAL @R_DrawColumnHorizP_ASM@0
GLOBAL _R_DrawColumnHorizP_ASM
GLOBAL R_DrawColumnHorizP_ASM
align 16
@R_DrawColumnHorizP_ASM@0:
R_DrawColumnHorizP_ASM:
_R_DrawColumnHorizP_ASM:
; count = dc_yh - dc_yl;
mov eax,[dc_yh]
mov ecx,[dc_yl]
sub eax,ecx
mov edx,[dc_x]
jl near .leave ; count < 0: nothing to do, so leave
push ebp ; save registers
push ebx
push edi
push esi
inc eax ; make 0 count mean 0 pixels
and edx,3
push eax
mov esi,[dc_ctspan+edx*4]
lea eax,[dc_temp+ecx*4+edx] ; eax = top of column in buffer
mov ebp,[dc_yh]
mov [esi],ecx
mov [esi+4],ebp
add esi,8
mov edi,[dc_source]
mov [dc_ctspan+edx*4],esi
mov esi,[dc_iscale]
mov ecx,[dc_texturefrac] ; ecx = frac
mov dl,[edi] ; load cache
mov ebx,[esp]
and ebx,0xfffffff8
jnz .mthan8
; Register usage in the following code is:
;
; eax: dest
; edi: source
; ecx: frac (16.16)
; esi: fracstep (16.16)
; ebx: add1
; ebp: add2
; dl: texel1
; dh: texel2
;[esp] count
; there are fewer than 8 pixels to draw
mov ebx,[esp]
.lthan8 shr ebx,1
jnc .even
; do one pixel before loop (little opportunity for pairing)
mov ebp,ecx ; copy frac to ebx
add ecx,esi ; increment frac
shr ebp,16 ; shift frac over to low end
add eax,4
mov dl,[edi+ebp]
mov [eax-4],dl
.even test ebx,ebx
jz near .done
.loop2 mov [esp],ebx ; save counter
mov ebx,ecx ; copy frac for texel1 to ebx
shr ebx,16 ; shift frac for texel1 to low end
add ecx,esi ; increment frac
mov ebp,ecx ; copy frac for texel2 to ebp
shr ebp,16 ; shift frac for texel2 to low end
add ecx,esi ; increment frac
mov dl,[edi+ebx] ; read texel1
mov ebx,[esp] ; fetch counter
mov dh,[edi+ebp] ; read texel2
mov [eax],dl ; write texel1
mov [eax+4],dh ; write texel2
add eax,8 ; increment dest
dec ebx ; decrement counter
jnz .loop2 ; loop until it hits 0
jmp .done
; there are more than 8 pixels to draw. position eax as close to a 32 byte
; boundary as possible, then do whatever is left.
.mthan8 test eax,4
jz .try2
mov ebp,ecx ; frac: in ebp
add ecx,esi ; step
shr ebp,16 ; frac: shift
add eax,4 ; increment dest
mov ebx,[esp] ; fetch counter
mov dl,[edi+ebp] ; tex: read
dec ebx ; decrement counter
mov [eax-4],dl ; tex: write
mov [esp],ebx ; store counter
.try2 test eax,8
jz .try4
mov ebx,ecx ; frac1: in ebx
add ecx,esi ; step
shr ebx,16 ; frac1: shift
mov ebp,ecx ; frac2: in ebp
shr ebp,16 ; frac2: shift
add ecx,esi ; step
mov dl,[edi+ebx] ; tex1: read
mov ebx,[esp] ; fetch counter
mov dh,[edi+ebp] ; tex2: read
mov [eax],dl ; tex1: write
mov [eax+4],dh ; tex2: write
sub ebx,2 ; decrement counter
add eax,8 ; increment dest
mov [esp],ebx ; store counter
.try4 test eax,16
jz .try8
mov ebx,ecx ; frac1: in ebx
add ecx,esi ; step
shr ebx,16 ; frac1: shift
mov ebp,ecx ; frac2: in ebp
shr ebp,16 ; frac2: shift
add ecx,esi ; step
mov dl,[edi+ebx] ; tex1: read
mov ebx,ecx ; frac3: in ebx
shr ebx,16 ; frac3: shift
mov dh,[edi+ebp] ; tex2: read
add ecx,esi ; step
mov [eax],dl ; tex1: write
mov [eax+4],dh ; tex2: write
mov ebp,ecx ; frac4: in ebp
shr ebp,16 ; frac4: shift
add ecx,esi ; step
mov dl,[edi+ebx] ; tex3: read
mov ebx,[esp] ; fetch counter
mov dh,[edi+ebp] ; tex4: read
sub ebx,4 ; decrement counter
mov [esp],ebx ; store counter
mov [eax+8],dl ; tex3: write
mov [eax+12],dh ; tex4: write
add eax,16 ; increment dest
.try8 mov ebx,[esp] ; make counter count groups of 8
sub esp,4
shr ebx,3
jmp .tail8
align 16
.loop8 mov [esp],ebx ; save counter
mov ebx,ecx ; frac1: in ebx
shr ebx,16 ; frac1: shift
add ecx,esi ; step
mov ebp,ecx ; frac2: in ebp
shr ebp,16 ; frac2: shift
add ecx,esi ; step
mov dl,[edi+ebx] ; tex1: read
mov ebx,ecx ; frac3: in ebx
mov dh,[edi+ebp] ; tex2: read
shr ebx,16 ; frac3: shift
add ecx,esi ; step
mov [eax],dl ; tex1: write
mov [eax+4],dh ; tex2: write
mov ebp,ecx ; frac4: in ebp
shr ebp,16 ; frac4: shift
add ecx,esi ; step
mov dl,[edi+ebx] ; tex3: read
mov ebx,ecx ; frac5: in ebx
mov dh,[edi+ebp] ; tex4: read
shr ebx,16 ; frac5: shift
mov [eax+8],dl ; tex3: write
mov [eax+12],dh ; tex4: write
add ecx,esi ; step
mov ebp,ecx ; frac6: in ebp
shr ebp,16 ; frac6: shift
mov dl,[edi+ebx] ; tex5: read
add ecx,esi ; step
mov ebx,ecx ; frac7: in ebx
mov [eax+16],dl ; tex5: write
shr ebx,16 ; frac7: shift
mov dh,[edi+ebp] ; tex6: read
add ecx,esi ; step
mov ebp,ecx ; frac8: in ebp
mov [eax+20],dh ; tex6: write
shr ebp,16 ; frac8: shift
add eax,32 ; increment dest pointer
mov dl,[edi+ebx] ; tex7: read
mov ebx,[esp] ; fetch counter
mov [eax-8],dl ; tex7: write
mov dh,[edi+ebp] ; tex8: read
add ecx,esi ; step
mov [eax-4],dh ; tex8: write
mov dl,[eax] ; load cache
dec ebx ; decrement counter
.tail8 jnz near .loop8 ; loop if more to do
pop ebp
mov ebx,[esp]
and ebx,7
jnz near .lthan8
.done pop eax
pop esi
pop edi
pop ebx
pop ebp
.leave ret
;*----------------------------------------------------------------------
;*
;* rt_copy1col_asm
;*
;* ecx = hx
;* edx = sx
;* [esp+4] = yl
;* [esp+8] = yh
;*
;*----------------------------------------------------------------------
GLOBAL @rt_copy1col_asm@16
GLOBAL _rt_copy1col_asm
GLOBAL rt_copy1col_asm
align 16
rt_copy1col_asm:
_rt_copy1col_asm:
pop eax
mov edx,[esp+4*3]
mov ecx,[esp+4*2]
push edx
push ecx
mov ecx,[esp+4*2]
mov edx,[esp+4*3]
push eax
@rt_copy1col_asm@16:
mov eax, [esp+4]
push ebx
mov ebx, [esp+12]
push esi
sub ebx, eax
push edi
js .done
lea esi,[eax*4]
inc ebx ; ebx = count
mov eax,edx
lea ecx,[dc_temp+ecx+esi] ; ecx = source
mov edi,[ylookup+esi]
mov esi,[dc_pitch] ; esi = pitch
add eax,edi ; eax = dest
add eax,[dc_destorg]
shr ebx,1
jnc .even
mov dl,[ecx]
add ecx,4
mov [eax],dl
add eax,esi
.even and ebx,ebx
jz .done
.loop mov dl,[ecx]
mov dh,[ecx+4]
mov [eax],dl
mov [eax+esi],dh
add ecx,8
lea eax,[eax+esi*2]
dec ebx
jnz .loop
.done pop edi
pop esi
pop ebx
ret 8
;*----------------------------------------------------------------------
;*
;* rt_copy4cols_asm
;*
;* ecx = sx
;* edx = yl
;* [esp+4] = yh
;*
;*----------------------------------------------------------------------
GLOBAL @rt_copy4cols_asm@12
GLOBAL _rt_copy4cols_asm
GLOBAL rt_copy4cols_asm
align 16
rt_copy4cols_asm:
_rt_copy4cols_asm:
pop eax
mov ecx,[esp+8]
mov edx,[esp+4]
push ecx
mov ecx,[esp+4]
push eax
@rt_copy4cols_asm@12:
push ebx
mov ebx,[esp+8]
push esi
sub ebx,edx
push edi
js .done
inc ebx ; ebx = count
mov eax,ecx
mov esi,[ylookup+edx*4]
lea ecx,[dc_temp+edx*4] ; ecx = source
mov edx,[dc_pitch] ; edx = pitch
add eax,esi ; eax = dest
add eax,[dc_destorg]
shr ebx,1
jnc .even
mov esi,[ecx]
add ecx,4
mov [eax],esi
add eax,edx
.even and ebx,ebx
jz .done
.loop mov esi,[ecx]
mov edi,[ecx+4]
mov [eax],esi
mov [eax+edx],edi
add ecx,8
lea eax,[eax+edx*2]
dec ebx
jnz .loop
.done pop edi
pop esi
pop ebx
ret 4
;*----------------------------------------------------------------------
;*
;* rt_map1col_asm
;*
;* ecx = hx
;* edx = sx
;* [esp+4] = yl
;* [esp+8] = yh
;*
;*----------------------------------------------------------------------
GLOBAL @rt_map1col_asm@16
GLOBAL _rt_map1col_asm
GLOBAL rt_map1col_asm
align 16
rt_map1col_asm:
_rt_map1col_asm:
pop eax
mov edx,[esp+4*3]
mov ecx,[esp+4*2]
push edx
push ecx
mov ecx,[esp+4*2]
mov edx,[esp+4*3]
push eax
@rt_map1col_asm@16:
mov eax,[esp+4]
push ebx
mov ebx,[esp+12]
push ebp
push esi
sub ebx, eax
push edi
js .done
lea edi,[eax*4]
mov esi,[dc_colormap] ; esi = colormap
inc ebx ; ebx = count
mov eax,edx
lea ebp,[dc_temp+ecx+edi] ; ebp = source
mov ecx,[ylookup+edi]
mov edi,[dc_pitch] ; edi = pitch
add eax,ecx ; eax = dest
xor ecx,ecx
xor edx,edx
add eax,[dc_destorg]
shr ebx,1
jnc .even
mov dl,[ebp]
add ebp,4
mov dl,[esi+edx]
mov [eax],dl
add eax,edi
.even and ebx,ebx
jz .done
.loop mov dl,[ebp]
mov cl,[ebp+4]
add ebp,8
mov dl,[esi+edx]
mov cl,[esi+ecx]
mov [eax],dl
mov [eax+edi],cl
dec ebx
lea eax,[eax+edi*2]
jnz .loop
.done pop edi
pop esi
pop ebp
pop ebx
ret 8
;*----------------------------------------------------------------------
;*
;* rt_map4cols_asm
;*
;* rt_map4cols_asm1 is for PPro and above
;* rt_map4cols_asm2 is for Pentium and below
;*
;* ecx = sx
;* edx = yl
;* [esp+4] = yh
;*
;*----------------------------------------------------------------------
GLOBAL @rt_map4cols_asm1@12
GLOBAL _rt_map4cols_asm1
GLOBAL rt_map4cols_asm1
align 16
rt_map4cols_asm1:
_rt_map4cols_asm1:
pop eax
mov ecx,[esp+8]
mov edx,[esp+4]
push ecx
mov ecx,[esp+4]
push eax
@rt_map4cols_asm1@12:
push ebx
mov ebx,[esp+8]
push ebp
push esi
sub ebx,edx
push edi
js near .done
mov esi,[dc_colormap] ; esi = colormap
shl edx,2
mov eax,ecx
inc ebx ; ebx = count
mov edi,[ylookup+edx]
lea ebp,[dc_temp+edx] ; ebp = source
add eax,edi ; eax = dest
mov edi,[dc_pitch] ; edi = pitch
add eax,[dc_destorg]
xor ecx,ecx
xor edx,edx
shr ebx,1
jnc .even
mov dl,[ebp]
mov cl,[ebp+1]
add ebp,4
mov dl,[esi+edx]
mov cl,[esi+ecx]
mov [eax],dl
mov [eax+1],cl
mov dl,[ebp-2]
mov cl,[ebp-1]
mov dl,[esi+edx]
mov cl,[esi+ecx]
mov [eax+2],dl
mov [eax+3],cl
add eax,edi
.even and ebx,ebx
jz .done
.loop:
mov dl,[ebp]
mov cl,[ebp+1]
add ebp,8
mov dl,[esi+edx]
mov cl,[esi+ecx]
mov [eax],dl
mov [eax+1],cl
mov dl,[ebp-6]
mov cl,[ebp-5]
mov dl,[esi+edx]
mov cl,[esi+ecx]
mov [eax+2],dl
mov [eax+3],cl
mov dl,[ebp-4]
mov cl,[ebp-3]
mov dl,[esi+edx]
mov cl,[esi+ecx]
mov [eax+edi],dl
mov [eax+edi+1],cl
mov dl,[ebp-2]
mov cl,[ebp-1]
mov dl,[esi+edx]
mov cl,[esi+ecx]
mov [eax+edi+2],dl
mov [eax+edi+3],cl
lea eax,[eax+edi*2]
dec ebx
jnz .loop
.done pop edi
pop esi
pop ebp
pop ebx
ret 4
GLOBAL @rt_map4cols_asm2@12
GLOBAL _rt_map4cols_asm2
GLOBAL rt_map4cols_asm2
align 16
rt_map4cols_asm2:
_rt_map4cols_asm2:
pop eax
mov ecx,[esp+8]
mov edx,[esp+4]
push ecx
mov ecx,[esp+4]
push eax
@rt_map4cols_asm2@12:
push ebx
mov ebx,[esp+8]
push ebp
push esi
sub ebx,edx
push edi
js near .done
mov esi,[dc_colormap] ; esi = colormap
shl edx,2
mov eax,ecx
inc ebx ; ebx = count
mov edi,[ylookup+edx]
lea ebp,[dc_temp+edx] ; ebp = source
add eax,edi ; eax = dest
mov edi,[dc_pitch] ; edi = pitch
add eax,[dc_destorg]
xor ecx,ecx
xor edx,edx
shr ebx,1
jnc .even
mov dl,[ebp]
mov cl,[ebp+1]
add ebp,4
mov dl,[esi+edx]
mov cl,[esi+ecx]
mov [eax],dl
mov [eax+1],cl
mov dl,[ebp-2]
mov cl,[ebp-1]
mov dl,[esi+edx]
mov cl,[esi+ecx]
mov [eax+2],dl
mov [eax+3],cl
add eax,edi
.even and ebx,ebx
jz .done
.loop:
mov dl,[ebp+3]
mov ch,[esi+edx]
mov dl,[ebp+2]
mov cl,[esi+edx]
shl ecx,16
mov dl,[ebp+1]
mov ch,[esi+edx]
mov dl,[ebp]
mov cl,[esi+edx]
mov [eax],ecx
add eax,edi
mov dl,[ebp+7]
mov ch,[esi+edx]
mov dl,[ebp+6]
mov cl,[esi+edx]
shl ecx,16
mov dl,[ebp+5]
mov ch,[esi+edx]
mov dl,[ebp+4]
mov cl,[esi+edx]
mov [eax],ecx
add eax,edi
add ebp,8
dec ebx
jnz .loop
.done pop edi
pop esi
pop ebp
pop ebx
ret 4
align 16
GLOBAL rt_shaded4cols_asm
GLOBAL _rt_shaded4cols_asm
rt_shaded4cols_asm:
_rt_shaded4cols_asm:
mov ecx,[esp+8]
push ebp
mov ebp,[esp+16]
sub ebp,ecx
js near s4nil
mov eax,[ylookup+ecx*4]
add eax,[dc_destorg] ; eax = destination
push ebx
push esi
inc ebp ; ebp = count
add eax,[esp+16]
push edi
lea esi,[dc_temp+ecx*4] ; esi = source
align 16
s4loop: movzx edx,byte [esi]
movzx ecx,byte [esi+1]
s4cm1: movzx edx,byte [SPACEFILLER4+edx] ; colormap
s4cm2: movzx edi,byte [SPACEFILLER4+ecx] ; colormap
shl edx,8
movzx ebx,byte [eax]
shl edi,8
movzx ecx,byte [eax+1]
sub ebx,edx
sub ecx,edi
mov ebx,[Col2RGB8+0x10000+ebx*4]
mov ecx,[Col2RGB8+0x10000+ecx*4]
s4fg1: add ebx,[SPACEFILLER4+edx*4]
s4fg2: add ecx,[SPACEFILLER4+edi*4]
or ebx,0x1f07c1f
or ecx,0x1f07c1f
mov edx,ebx
shr ebx,15
mov edi,ecx
shr ecx,15
and edx,ebx
and ecx,edi
mov bl,[RGB32k+edx]
movzx edx,byte [esi+2]
mov bh,[RGB32k+ecx]
movzx ecx,byte [esi+3]
mov [eax],bl
mov [eax+1],bh
s4cm3: movzx edx,byte [SPACEFILLER4+edx] ; colormap
s4cm4: movzx edi,byte [SPACEFILLER4+ecx] ; colormap
shl edx,8
movzx ebx,byte [eax+2]
shl edi,8
movzx ecx,byte [eax+3]
sub ebx,edx
sub ecx,edi
mov ebx,[Col2RGB8+0x10000+ebx*4]
mov ecx,[Col2RGB8+0x10000+ecx*4]
s4fg3: add ebx,[SPACEFILLER4+edx*4]
s4fg4: add ecx,[SPACEFILLER4+edi*4]
or ebx,0x1f07c1f
or ecx,0x1f07c1f
mov edx,ebx
shr ebx,15
mov edi,ecx
shr ecx,15
and edx,ebx
and ecx,edi
s4p: add eax,320 ; pitch
add esi,4
mov bl,[RGB32k+edx]
mov bh,[RGB32k+ecx]
s4p2: mov [eax-320+2],bl
s4p3: mov [eax-320+3],bh
dec ebp
jne s4loop
pop edi
pop esi
pop ebx
s4nil: pop ebp
ret
align 16
GLOBAL rt_add4cols_asm
GLOBAL _rt_add4cols_asm
rt_add4cols_asm:
_rt_add4cols_asm:
mov ecx,[esp+8]
push edi
mov edi,[esp+16]
sub edi,ecx
js near a4nil
mov eax,[ylookup+ecx*4]
add eax,[dc_destorg]
push ebx
push esi
push ebp
inc edi
add eax,[esp+20]
lea esi,[dc_temp+ecx*4]
align 16
a4loop:
movzx ebx,byte [esi]
movzx edx,byte [esi+1]
movzx ecx,byte [eax]
movzx ebp,byte [eax+1]
a4cm1: movzx ebx,byte [SPACEFILLER4+ebx] ; colormap
a4cm2: movzx edx,byte [SPACEFILLER4+edx] ; colormap
a4bg1: mov ecx,[SPACEFILLER4+ecx*4] ; bg2rgb
a4bg2: mov ebp,[SPACEFILLER4+ebp*4] ; bg2rgb
a4fg1: add ecx,[SPACEFILLER4+ebx*4] ; fg2rgb
a4fg2: add ebp,[SPACEFILLER4+edx*4] ; fg2rgb
or ecx,0x01f07c1f
or ebp,0x01f07c1f
mov ebx,ecx
shr ecx,15
mov edx,ebp
shr ebp,15
and ecx,ebx
and ebp,edx
movzx ebx,byte [esi+2]
movzx edx,byte [esi+3]
mov cl,[RGB32k+ecx]
mov ch,[RGB32k+ebp]
mov [eax],cl
mov [eax+1],ch
movzx ecx,byte [eax+2]
movzx ebp,byte [eax+3]
a4cm3: movzx ebx,byte [SPACEFILLER4+ebx] ; colormap
a4cm4: movzx edx,byte [SPACEFILLER4+edx] ; colormap
a4bg3: mov ecx,[SPACEFILLER4+ecx*4] ; bg2rgb
a4bg4: mov ebp,[SPACEFILLER4+ebp*4] ; bg2rgb
a4fg3: add ecx,[SPACEFILLER4+ebx*4] ; fg2rgb
a4fg4: add ebp,[SPACEFILLER4+edx*4] ; fg2rgb
or ecx,0x01f07c1f
or ebp,0x01f07c1f
mov ebx,ecx
shr ecx,15
mov edx,ebp
shr ebp,15
and ebx,ecx
and edx,ebp
mov cl,[RGB32k+ebx]
mov ch,[RGB32k+edx]
mov [eax+2],cl
mov [eax+3],ch
add esi,4
a4p: add eax,320 ; pitch
sub edi,1
jne a4loop
pop ebp
pop esi
pop ebx
a4nil: pop edi
ret
align 16
GLOBAL rt_addclamp4cols_asm
GLOBAL _rt_addclamp4cols_asm
rt_addclamp4cols_asm:
_rt_addclamp4cols_asm:
mov ecx,[esp+8]
push edi
mov edi,[esp+16]
sub edi,ecx
js near ac4nil
mov eax,[ylookup+ecx*4]
add eax,[dc_destorg]
push ebx
push esi
push ebp
inc edi
add eax,[esp+20]
lea esi,[dc_temp+ecx*4]
push edi
align 16
ac4loop:
movzx ebx,byte [esi]
movzx edx,byte [esi+1]
mov [esp],edi
ac4cm1: movzx ebx,byte [SPACEFILLER4+ebx] ; colormap
ac4cm2: movzx edx,byte [SPACEFILLER4+edx] ; colormap
movzx ecx,byte [eax]
movzx ebp,byte [eax+1]
ac4fg1: mov ebx,[SPACEFILLER4+ebx*4] ; fg2rgb
ac4fg2: mov edx,[SPACEFILLER4+edx*4] ; fg2rgb
ac4bg1: add ebx,[SPACEFILLER4+ecx*4] ; bg2rgb
ac4bg2: add edx,[SPACEFILLER4+ebp*4] ; bg2rgb
mov ecx,ebx
or ebx,0x01f07c1f
and ecx,0x40100400
and ebx,0x3fffffff
mov edi,ecx
shr ecx,5
mov ebp,edx
sub edi,ecx
or edx,0x01f07c1f
or ebx,edi
mov ecx,ebx
shr ebx,15
and ebp,0x40100400
and ebx,ecx
and edx,0x3fffffff
mov edi,ebp
shr ebp,5
mov cl,[RGB32k+ebx]
sub edi,ebp
mov [eax],cl
or edx,edi
mov ebp,edx
shr edx,15
movzx ebx,byte [esi+2]
and ebp,edx
movzx edx,byte [esi+3]
ac4cm3: movzx ebx,byte [SPACEFILLER4+ebx] ; colormap
mov cl,[RGB32k+ebp]
ac4cm4: movzx edx,byte [SPACEFILLER4+edx] ; colormap
mov [eax+1],cl
movzx ecx,byte [eax+2]
movzx ebp,byte [eax+3]
ac4fg3: mov ebx,[SPACEFILLER4+ebx*4] ; fg2rgb
ac4fg4: mov edx,[SPACEFILLER4+edx*4] ; fg2rgb
ac4bg3: add ebx,[SPACEFILLER4+ecx*4] ; bg2rgb
ac4bg4: add edx,[SPACEFILLER4+ebp*4] ; bg2rgb
mov ecx,ebx
or ebx,0x01f07c1f
and ecx,0x40100400
and ebx,0x3fffffff
mov edi,ecx
shr ecx,5
mov ebp,edx
sub edi,ecx
or edx,0x01f07c1f
or ebx,edi
mov ecx,ebx
shr ebx,15
and ebp,0x40100400
and ebx,ecx
and edx,0x3fffffff
mov edi,ebp
shr ebp,5
mov cl,[RGB32k+ebx]
sub edi,ebp
mov [eax+2],cl
or edx,edi
mov edi,[esp]
mov ebp,edx
shr edx,15
add esi,4
and edx,ebp
mov cl,[RGB32k+edx]
mov [eax+3],cl
ac4p: add eax,320 ; pitch
sub edi,1
jne ac4loop
pop edi
pop ebp
pop esi
pop ebx
ac4nil: pop edi
ret
align 16
;************************
SECTION .text
GLOBAL R_SetupShadedCol
GLOBAL @R_SetupShadedCol@0
# Patch the values of dc_colormap and dc_color into the shaded column drawer.
R_SetupShadedCol:
@R_SetupShadedCol@0:
mov eax,[dc_colormap]
cmp [s4cm1+3],eax
je .cmdone
mov [s4cm1+3],eax
mov [s4cm2+3],eax
mov [s4cm3+3],eax
mov [s4cm4+3],eax
.cmdone mov eax,[dc_color]
lea eax,[Col2RGB8+eax*4]
cmp [s4fg1+3],eax
je .cdone
mov [s4fg1+3],eax
mov [s4fg2+3],eax
mov [s4fg3+3],eax
mov [s4fg4+3],eax
.cdone ret
GLOBAL R_SetupAddCol
GLOBAL @R_SetupAddCol@0
# Patch the values of dc_colormap, dc_srcblend, and dc_destblend into the
# unclamped adding column drawer.
R_SetupAddCol:
@R_SetupAddCol@0:
mov eax,[dc_colormap]
cmp [a4cm1+3],eax
je .cmdone
mov [a4cm1+3],eax
mov [a4cm2+3],eax
mov [a4cm3+3],eax
mov [a4cm4+3],eax
.cmdone mov eax,[dc_srcblend]
cmp [a4fg1+3],eax
je .sbdone
mov [a4fg1+3],eax
mov [a4fg2+3],eax
mov [a4fg3+3],eax
mov [a4fg4+3],eax
.sbdone mov eax,[dc_destblend]
cmp [a4bg1+3],eax
je .dbdone
mov [a4bg1+3],eax
mov [a4bg2+3],eax
mov [a4bg3+3],eax
mov [a4bg4+3],eax
.dbdone ret
GLOBAL R_SetupAddClampCol
GLOBAL @R_SetupAddClampCol@0
# Patch the values of dc_colormap, dc_srcblend, and dc_destblend into the
# add with clamping column drawer.
R_SetupAddClampCol:
@R_SetupAddClampCol@0:
mov eax,[dc_colormap]
cmp [ac4cm1+3],eax
je .cmdone
mov [ac4cm1+3],eax
mov [ac4cm2+3],eax
mov [ac4cm3+3],eax
mov [ac4cm4+3],eax
.cmdone mov eax,[dc_srcblend]
cmp [ac4fg1+3],eax
je .sbdone
mov [ac4fg1+3],eax
mov [ac4fg2+3],eax
mov [ac4fg3+3],eax
mov [ac4fg4+3],eax
.sbdone mov eax,[dc_destblend]
cmp [ac4bg1+3],eax
je .dbdone
mov [ac4bg1+3],eax
mov [ac4bg2+3],eax
mov [ac4bg3+3],eax
mov [ac4bg4+3],eax
.dbdone ret
EXTERN setvlinebpl_
EXTERN setpitch3
GLOBAL @ASM_PatchPitch@0
GLOBAL _ASM_PatchPitch
GLOBAL ASM_PatchPitch
ASM_PatchPitch:
_ASM_PatchPitch:
@ASM_PatchPitch@0:
mov eax,[dc_pitch]
mov [rdcp1+2],eax
mov [rdcp2+2],eax
mov [rdcp3+2],eax
mov [s4p+1],eax
mov [a4p+1],eax
mov [ac4p+1],eax
mov ecx,eax
neg ecx
inc ecx
inc ecx
mov [s4p2+2],ecx
inc ecx
mov [s4p3+2],ecx
call setpitch3
jmp setvlinebpl_
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