ref: 516fc276f112baf0bd4508596598aed49929bde9
dir: /src/rt_scale.c/
/*
Copyright (C) 1994-1995 Apogee Software, Ltd.
Copyright (C) 2002-2015 icculus.org, GNU/Linux port
Copyright (C) 2017-2018 Steven LeVesque
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "rt_def.h"
#include "watcom.h"
#include <stdio.h>
#include <string.h>
#include "modexlib.h"
#include "rt_util.h"
#include "rt_draw.h"
#include "rt_scale.h"
#include "_rt_scal.h"
#include "rt_sc_a.h"
#include "engine.h"
#include "w_wad.h"
#include "z_zone.h"
#include "lumpy.h"
#include "rt_main.h"
#include "rt_ted.h"
#include "rt_vid.h"
#include "rt_view.h"
#include "rt_playr.h"
/*
=============================================================================
GLOBALS
=============================================================================
*/
// Draw Column vars
int dc_texturemid;
int dc_iscale;
int dc_invscale;
int sprtopoffset;
int dc_yl;
int dc_yh;
//byte * dc_firstsource;
byte * dc_source;
int centeryclipped;
int transparentlevel=0;
/*
==========================
=
= SetPlayerLightLevel
=
==========================
*/
void SetPlayerLightLevel (void)
{
int i;
int lv;
int intercept;
int height;
whereami=23;
if (MISCVARS->GASON==1)
{
shadingtable=greenmap+(MISCVARS->gasindex<<8);
return;
}
if (fulllight || fog)
{
shadingtable=colormap+(1<<12);
return;
}
height=PLAYERHEIGHT;
if (player->angle < FINEANGLES/8 || player->angle > 7*FINEANGLES/8)
intercept=(player->x>>11)&0x1c;
else if (player->angle < 3*FINEANGLES/8)
intercept=(player->y>>11)&0x1c;
else if (player->angle < 5*FINEANGLES/8)
intercept=(player->x>>11)&0x1c;
else
intercept=(player->y>>11)&0x1c;
if (lightsource)
{
lv=(((LightSourceAt(player->x>>16,player->y>>16)>>intercept)&0xf)>>1);
i=maxshade-(height>>normalshade)-lv;
if (i<minshade) i=minshade;
shadingtable=colormap+(i<<8);
}
else
{
i=maxshade-(height>>normalshade);
if (i<minshade) i=minshade;
shadingtable=colormap+(i<<8);
}
}
/*
==========================
=
= SetLightLevel
=
==========================
*/
void SetLightLevel (int height)
{
int i;
whereami=24;
if (MISCVARS->GASON==1)
{
shadingtable=greenmap+(MISCVARS->gasindex<<8);
return;
}
if (fulllight)
{
shadingtable=colormap+(1<<12);
return;
}
if (fog)
{
i=((height*200/iGLOBAL_SCREENHEIGHT)>>normalshade)+minshade;
if (i>maxshade) i=maxshade;
shadingtable=colormap+(i<<8);
}
else
{
i=maxshade-(height>>normalshade);
if (i<minshade) i=minshade;
shadingtable=colormap+(i<<8);
}
}
/*
==========================
=
= ScaleTransparentPost
=
==========================
*/
void ScaleTransparentPost (byte * src, byte * buf, int level)
{
int offset;
int length;
int topscreen;
int bottomscreen;
byte * oldlevel;
byte * seelevel;
whereami=25;
seelevel=colormap+(((level+64)>>2)<<8);
oldlevel=shadingtable;
offset=*(src++);
for (; offset!=255;)
{
length=*(src++);
topscreen = sprtopoffset + (dc_invscale*offset);
bottomscreen = topscreen + (dc_invscale*length);
dc_yl = (topscreen+SFRACUNIT)>>SFRACBITS;
dc_yh = ((bottomscreen-1)>>SFRACBITS);
if (dc_yh >= viewheight)
dc_yh = viewheight-1;
if (dc_yl < 0)
dc_yl = 0;
if ((*src)==254)
{
shadingtable=seelevel;
if (dc_yl <= dc_yh)
R_TransColumn (buf);
src++;
offset=*(src++);
shadingtable=oldlevel;
}
else
{
if (dc_yl <= dc_yh)
{
dc_source=src-offset;
R_DrawColumn (buf);
}
src+=length;
offset=*(src++);
}
}
whereami=-2;
}
void ScaleMaskedPost (byte * src, byte * buf)
{
int offset;
int length;
int topscreen;
int bottomscreen;
whereami=26;
offset=*(src++);
for (; offset!=255;)
{
length=*(src++);
topscreen = sprtopoffset + (dc_invscale*offset);
bottomscreen = topscreen + (dc_invscale*length);
dc_yl = (topscreen+SFRACUNIT)>>SFRACBITS;
dc_yh = ((bottomscreen-1)>>SFRACBITS);
if (dc_yh >= viewheight)
dc_yh = viewheight-1;
if (dc_yl < 0)
dc_yl = 0;
if (dc_yl <= dc_yh)
{
dc_source=src-offset;
R_DrawColumn (buf);
}
src+=length;
offset=*(src++);
}
}
void ScaleClippedPost (byte * src, byte * buf)
{
int offset;
int length;
int topscreen;
int bottomscreen;
whereami=27;
offset=*(src++);
for (; offset!=255;)
{
length=*(src++);
topscreen = sprtopoffset + (dc_invscale*offset);
bottomscreen = topscreen + (dc_invscale*length);
dc_yl = (topscreen+SFRACUNIT-1)>>SFRACBITS;
dc_yh = ((bottomscreen-1)>>SFRACBITS);
if (dc_yh >= viewheight)
dc_yh = viewheight-1;
if (dc_yl < 0)
dc_yl = 0;
if (dc_yl <= dc_yh)
{
dc_source=src-offset;
R_DrawClippedColumn (buf);
}
src+=length;
offset=*(src++);
}
}
void ScaleSolidMaskedPost (int color, byte * src, byte * buf)
{
int offset;
int length;
int topscreen;
int bottomscreen;
whereami=28;
offset=*(src++);
for (; offset!=255;)
{
length=*(src++);
topscreen = sprtopoffset + (dc_invscale*offset);
bottomscreen = topscreen + (dc_invscale*length);
dc_yl = (topscreen+SFRACUNIT)>>SFRACBITS;
dc_yh = ((bottomscreen-1)>>SFRACBITS);
if (dc_yh >= viewheight)
dc_yh = viewheight-1;
if (dc_yl < 0)
dc_yl = 0;
if (dc_yl <= dc_yh)
{
dc_source=src-offset;
R_DrawSolidColumn (color, buf);
}
src+=length;
offset=*(src++);
}
}
void ScaleTransparentClippedPost (byte * src, byte * buf, int level)
{
int offset;
int length;
int topscreen;
int bottomscreen;
byte * oldlevel;
byte * seelevel;
whereami=29;
seelevel=colormap+(((level+64)>>2)<<8);
oldlevel=shadingtable;
offset=*(src++);
for (; offset!=255;)
{
length=*(src++);
topscreen = sprtopoffset + (dc_invscale*offset);
bottomscreen = topscreen + (dc_invscale*length);
dc_yl = (topscreen+SFRACUNIT)>>SFRACBITS;
dc_yh = ((bottomscreen-1)>>SFRACBITS);
if (dc_yh >= viewheight)
dc_yh = viewheight-1;
if (dc_yl < 0)
dc_yl = 0;
if ((*src)==254)
{
shadingtable=seelevel;
if (dc_yl <= dc_yh)
R_TransColumn (buf);
src++;
offset=*(src++);
shadingtable=oldlevel;
}
else
{
if (dc_yl <= dc_yh)
{
dc_source=src-offset;
R_DrawClippedColumn (buf);
}
src+=length;
offset=*(src++);
}
}
}
void ScaleMaskedWidePost (byte * src, byte * buf, int x, int width)
{
buf += x;
while (width--) {
ScaleMaskedPost(src,buf);
buf++;
}
}
void ScaleClippedWidePost (byte * src, byte * buf, int x, int width)
{
buf += x;
while (width--) {
ScaleClippedPost(src,buf);
buf++;
}
}
/*
=======================
=
= ScaleShape
=
=======================
*/
void ScaleShape (visobj_t * sprite)
{
byte *shape;
int frac;
patch_t *p;
int x1,x2;
int tx;
int size;
whereami=32;
shape=W_CacheLumpNum(sprite->shapenum,PU_CACHE, Cvt_patch_t, 1);
p=(patch_t *)shape;
size=p->origsize>>7;
// sprite->viewheight<<=1;
dc_invscale=sprite->viewheight<<((10-HEIGHTFRACTION)-size);
tx=-p->leftoffset;
sprite->viewx=(sprite->viewx<<SFRACBITS)-(sprite->viewheight<<(SFRACBITS-HEIGHTFRACTION-1))+(SFRACUNIT>>1);
//
// calculate edges of the shape
//
x1 = (sprite->viewx+(tx*dc_invscale))>>SFRACBITS;
if (x1 >= viewwidth)
{
return; // off the right side
}
tx+=p->width;
x2 = ((sprite->viewx+(tx*dc_invscale)) >>SFRACBITS) - 1 ;
if (x2 < 0)
{
return; // off the left side
}
// dc_iscale=(1<<(16+6+HEIGHTFRACTION+size))/sprite->viewheight;
dc_iscale=0xffffffffu/(unsigned)dc_invscale;
dc_texturemid=(((sprite->h1<<size) + p->topoffset)<<SFRACBITS);//+(SFRACUNIT>>1);
sprtopoffset=centeryfrac - FixedMul(dc_texturemid,dc_invscale);
shadingtable=sprite->colormap;
if (x1<0)
{
frac=dc_iscale*(-x1);
x1=0;
}
else
frac=0;
x2 = x2 >= viewwidth ? viewwidth-1 : x2;
if (sprite->viewheight>((1<<(HEIGHTFRACTION+6))<<size))
{
int texturecolumn;
int lastcolumn;
int startx;
int width;
width=1;
startx=0;
lastcolumn=-1;
for (; x1<=x2 ; x1++, frac += dc_iscale)
{
if (posts[x1].wallheight>sprite->viewheight)
{
if (lastcolumn>=0)
{
ScaleMaskedWidePost(((p->collumnofs[lastcolumn])+shape),(byte *)bufferofs,startx,width);
width=1;
lastcolumn=-1;
}
continue;
}
texturecolumn = frac>>SFRACBITS;
if ((texturecolumn==lastcolumn)&&(width<9))
{
width++;
continue;
}
else
{
if (lastcolumn>=0)
{
ScaleMaskedWidePost(((p->collumnofs[lastcolumn])+shape),(byte *)bufferofs,startx,width);
width=1;
startx=x1;
lastcolumn=texturecolumn;
}
else
{
startx=x1;
lastcolumn=texturecolumn;
}
}
}
if (lastcolumn!=-1)
ScaleMaskedWidePost(((p->collumnofs[lastcolumn])+shape),(byte *)bufferofs,startx,width);
}
else
{
byte * b;
int startfrac;
int startx;
startx=x1;
startfrac=frac;
if (doublestep>1)
{
{
frac=startfrac;
for (x1=startx; x1<=x2; x1+=2, frac += (dc_iscale<<1))
{
if (
(posts[x1].wallheight>sprite->viewheight) &&
(posts[x1+1].wallheight>sprite->viewheight)
)
continue;
if (x1==viewwidth-1)
ScaleMaskedWidePost(((p->collumnofs[frac>>SFRACBITS])+shape),(byte *)bufferofs,x1,1);
else
ScaleMaskedWidePost(((p->collumnofs[frac>>SFRACBITS])+shape),(byte *)bufferofs,x1,2);
}
}
}
else
{
{
frac=startfrac;
b=(byte *)bufferofs+startx;
for (x1=startx; x1<=x2; x1++, frac += dc_iscale,b++)
{
if (posts[x1].wallheight>sprite->viewheight)
continue;
ScaleMaskedPost(((p->collumnofs[frac>>SFRACBITS])+shape),b);
}
}
}
}
}
/*
=======================
=
= ScaleTranparentShape
=
=======================
*/
void ScaleTransparentShape (visobj_t * sprite)
{
byte *shape;
int frac;
transpatch_t *p;
int x1,x2;
int tx;
int size;
byte * b;
int startfrac;
int startx;
whereami=33;
shape=W_CacheLumpNum(sprite->shapenum,PU_CACHE, Cvt_transpatch_t, 1);
p=(transpatch_t *)shape;
size=p->origsize>>7;
dc_invscale=sprite->viewheight<<((10-HEIGHTFRACTION)-size);
tx=-p->leftoffset;
sprite->viewx=(sprite->viewx<<SFRACBITS)-(sprite->viewheight<<(SFRACBITS-HEIGHTFRACTION-1));
//
// calculate edges of the shape
//
x1 = (sprite->viewx+(tx*dc_invscale))>>SFRACBITS;
if (x1 >= viewwidth)
{
return; // off the right side
}
tx+=p->width;
x2 = ((sprite->viewx+(tx*dc_invscale)) >>SFRACBITS) - 1 ;
if (x2 < 0)
{
return; // off the left side
}
// dc_iscale=(1<<(16+6+HEIGHTFRACTION+size))/sprite->viewheight;
dc_iscale=0xffffffffu/(unsigned)dc_invscale;
dc_texturemid=(((sprite->h1<<size)+p->topoffset)<<SFRACBITS);//+(SFRACUNIT>>1);
sprtopoffset=centeryfrac - FixedMul(dc_texturemid,dc_invscale);
shadingtable=sprite->colormap;
if (x1<0)
{
frac=dc_iscale*(-x1);
x1=0;
}
else
frac=0;
x2 = x2 >= viewwidth ? viewwidth-1 : x2;
startx=x1;
startfrac=frac;
{
frac=startfrac;
b=(byte *)bufferofs+startx;
for (x1=startx; x1<=x2; x1++, frac += dc_iscale,b++)
{
if (posts[x1].wallheight>sprite->viewheight)
continue;
ScaleTransparentPost(((p->collumnofs[frac>>SFRACBITS])+shape),b,sprite->h2);
}
}
}
/*
=======================
=
= ScaleSolidShape
=
=======================
*/
void ScaleSolidShape (visobj_t * sprite)
{
byte *shape;
int frac;
patch_t *p;
int x1,x2;
int tx;
int size;
byte * b;
int startfrac;
int startx;
whereami=34;
shape=W_CacheLumpNum(sprite->shapenum,PU_CACHE, Cvt_patch_t, 1);
p=(patch_t *)shape;
size=p->origsize>>7;
dc_invscale=sprite->viewheight<<((10-HEIGHTFRACTION)-size);
tx=-p->leftoffset;
sprite->viewx=(sprite->viewx<<SFRACBITS)-(sprite->viewheight<<(SFRACBITS-HEIGHTFRACTION-1))+(SFRACUNIT>>1);
//
// calculate edges of the shape
//
x1 = (sprite->viewx+(tx*dc_invscale))>>SFRACBITS;
if (x1 >= viewwidth)
{
return; // off the right side
}
tx+=p->width;
x2 = ((sprite->viewx+(tx*dc_invscale)) >>SFRACBITS) - 1 ;
if (x2 < 0)
{
return; // off the left side
}
// dc_iscale=(1<<(16+6+HEIGHTFRACTION+size))/sprite->viewheight;
dc_iscale=0xffffffffu/(unsigned)dc_invscale;
dc_texturemid=(((sprite->h1<<size)+p->topoffset)<<SFRACBITS);//+(SFRACUNIT>>1);
sprtopoffset=centeryfrac - FixedMul(dc_texturemid,dc_invscale);
shadingtable=sprite->colormap;
if (x1<0)
{
frac=dc_iscale*(-x1);
x1=0;
}
else
frac=0;
x2 = x2 >= viewwidth ? viewwidth-1 : x2;
startx=x1;
startfrac=frac;
{
frac=startfrac;
b=(byte *)bufferofs+startx;
for (x1=startx; x1<=x2; x1++, frac += dc_iscale,b++)
{
if (posts[x1].wallheight>sprite->viewheight)
continue;
ScaleSolidMaskedPost(sprite->h2,((p->collumnofs[frac>>SFRACBITS])+shape),b);
}
}
}
/*
=======================
=
= ScaleWeapon
=
=======================
*/
void ScaleWeapon (int xoff, int y, int shapenum)
{
byte *shape;
int frac;
int h;
patch_t *p;
int x1,x2;
int tx;
int xcent;
byte * b;
int startfrac;
int startx;
whereami=35;
SetPlayerLightLevel();
shape=W_CacheLumpNum(shapenum,PU_CACHE, Cvt_patch_t, 1);
p=(patch_t *)shape;
h=((p->origsize*weaponscale)>>17);
centeryclipped=(viewheight-h)+FixedMul(y,weaponscale);
xcent=centerx+FixedMul(xoff,weaponscale);
dc_invscale=(h<<17)/p->origsize;
tx=-p->leftoffset;
xcent=(xcent<<SFRACBITS)-(h<<SFRACBITS);
//
// calculate edges of the shape
//
x1 = (xcent+(tx*dc_invscale))>>SFRACBITS;
if (x1 >= viewwidth)
return; // off the right side
tx+=p->width;
x2 = ((xcent+(tx*dc_invscale)) >>SFRACBITS) - 1 ;
if (x2 < 0)
return; // off the left side
dc_iscale=0xffffffffu/(unsigned)dc_invscale;
dc_texturemid=(((p->origsize>>1)+p->topoffset)<<SFRACBITS)+(SFRACUNIT>>2);
sprtopoffset=(centeryclipped<<16) - FixedMul(dc_texturemid,dc_invscale);
//
// store information in a vissprite
//
if (x1<0)
{
frac=dc_iscale*(-x1);
x1=0;
}
else
frac=0;
x2 = x2 >= viewwidth ? viewwidth-1 : x2;
startx=x1;
startfrac=frac;
{
frac=startfrac;
b=(byte *)bufferofs+startx;
for (x1=startx; x1<=x2 ; x1++, frac += dc_iscale,b++)
ScaleClippedPost(((p->collumnofs[frac>>SFRACBITS])+shape),b);
}
}
/*
=======================
=
= DrawUnScaledSprite
=
=======================
*/
void DrawUnScaledSprite (int x, int y, int shapenum, int shade)
{
byte *shape;
int frac;
patch_t *p;
int x1,x2;
int tx;
int xcent;
byte * b;
int startfrac;
int startx;
whereami=36;
shadingtable=colormap+(shade<<8);
centeryclipped=y;
xcent=x;
shape=W_CacheLumpNum(shapenum,PU_CACHE, Cvt_patch_t, 1);
p=(patch_t *)shape;
dc_invscale=0x10000;
tx=-p->leftoffset;
xcent-=p->origsize>>1;
//
// calculate edges of the shape
//
x1 = xcent+tx;
if (x1 >= viewwidth)
return; // off the right side
tx+=p->width;
x2 = xcent+tx - 1;
if (x2 < 0)
return; // off the left side
dc_iscale=0x10000;
dc_texturemid=(((p->height>>1)+p->topoffset)<<SFRACBITS);//+(SFRACUNIT>>1);
sprtopoffset=(centeryclipped<<16) - dc_texturemid;
//
// store information in a vissprite
//
if (x1<0)
{
frac=dc_iscale*(-x1);
x1=0;
}
else
frac = 0;
x2 = x2 >= viewwidth ? viewwidth-1 : x2;
startx=x1;
startfrac=frac;
{
frac=startfrac;
b=(byte *)bufferofs+startx;
for (x1=startx; x1<=x2 ; x1++, frac += dc_iscale,b++)
ScaleClippedPost(((p->collumnofs[frac>>SFRACBITS])+shape),b);
}
}
/*
=======================
=
= DrawScreenSprite
=
=======================
*/
void DrawScreenSprite (int x, int y, int shapenum)
{
whereami=37;
ScaleWeapon (x-160, y-200, shapenum);
}
/*
=======================
=
= DrawPositionedScaledSprite
=
=======================
*/
void DrawPositionedScaledSprite (int x, int y, int shapenum, int height, int type)
{
byte *shape;
int frac;
patch_t *p;
transpatch_t *tp;
int x1,x2;
int tx;
int xcent;
byte * b;
int startfrac;
int startx;
int size;
whereami=38;
shadingtable=colormap+(1<<12);
centeryclipped=y;
xcent=x;
shape=W_CacheLumpNum(shapenum,PU_CACHE, Cvt_patch_t, 1); // was transpatch, fixed
p=(patch_t *)shape;
tp=(transpatch_t *)shape;
size=p->origsize>>7;
dc_invscale=height<<(10-size);
tx=-p->leftoffset;
xcent=(xcent<<SFRACBITS)-(height<<(SFRACBITS-1));
//
// calculate edges of the shape
//
x1 = (xcent+(tx*dc_invscale))>>SFRACBITS;
if (x1 >= viewwidth)
return; // off the right side
tx+=p->width;
x2 = ((xcent+(tx*dc_invscale)) >>SFRACBITS) - 1 ;
if (x2 < 0)
return; // off the left side
dc_iscale=0xffffffffu/(unsigned)dc_invscale;
// dc_iscale=(1<<(16+6+size))/height;
dc_texturemid=(((32<<size)+p->topoffset)<<SFRACBITS)+(SFRACUNIT>>1);
sprtopoffset=(centeryclipped<<16) - FixedMul(dc_texturemid,dc_invscale);
//
// store information in a vissprite
//
if (x1<0)
{
frac=dc_iscale*(-x1);
x1=0;
}
else
frac=0;
x2 = x2 >= viewwidth ? viewwidth-1 : x2;
startx=x1;
startfrac=frac;
{
frac=startfrac;
b=(byte *)bufferofs+startx;
for (x1=startx; x1<=x2 ; x1++, frac += dc_iscale,b++)
if (type==0)
ScaleClippedPost(((p->collumnofs[frac>>SFRACBITS])+shape),b);
else
ScaleTransparentClippedPost(((tp->collumnofs[frac>>SFRACBITS])+shape),b,transparentlevel);
}
}
/*
=================
=
= DrawScreenSizedSprite
=
=================
*/
extern int G_gmasklump;
void DrawScreenSizedSprite (int lump)
{
//draws gasmask among other things zxcv
byte *shape,*src;
int frac;
patch_t *p;
int x1,x2;
int tx;
// int plane;
byte * b;
int startfrac;
int offset;
int length;
int topscreen;
int bottomscreen;
byte *cnt,*Ycnt;
// SetTextMode ( );
whereami=39;
shadingtable=colormap+(1<<12);
shape=W_CacheLumpNum(lump,PU_CACHE, Cvt_patch_t, 1);
p=(patch_t *)shape;
dc_invscale=(viewwidth<<16)/p->origsize;
tx=-p->leftoffset;
centeryclipped=viewheight>>1;
//centeryclipped=(viewheight>>1)+43;
//
// calculate edges of the shape
//
x1 = (tx*dc_invscale)>>SFRACBITS;
if (x1 >= viewwidth)
{
return; // off the right side
}
tx+=p->width;
x2 = ((tx*dc_invscale) >>SFRACBITS) - 1 ;
if (x2 < 0)
{
return; // off the left side
}
dc_iscale=0xffffffffu/(unsigned)dc_invscale;
dc_texturemid=(((p->origsize>>1) + p->topoffset)<<SFRACBITS)+(SFRACUNIT>>1);
sprtopoffset=(centeryclipped<<16) - FixedMul(dc_texturemid,dc_invscale);
x2 = (viewwidth-1);
startfrac=0;
{
frac=startfrac;
b=(byte *)bufferofs;
///////////// BNA PATCH //////////////////////////////////////////////////////////
//gmasklump=W_GetNumForName("p_gmask"); //=783
//perhaps I should have painted the mask in a seperate buffer
//and streched it and copyet it back, but that would demand
//a new buffer (size=800x600) and slowed the game down so ?
// if its the gasmask, paint black patches at hires
if ((lump == G_gmasklump)&&(iGLOBAL_SCREENWIDTH>320)) {
src = ((p->collumnofs[frac>>SFRACBITS])+shape);
offset=*(src++);
length=*(src++);
topscreen = sprtopoffset + (dc_invscale*offset);
bottomscreen = topscreen + (dc_invscale*length);
dc_yl = (topscreen+SFRACUNIT-1)>>SFRACBITS;//=41 viewheight=584
dc_yh = ((bottomscreen-1)>>SFRACBITS);//=540 viewwidth =800
//paint upper black patch in gasmask
for (cnt=b; cnt<b+viewwidth; cnt++) {
for (Ycnt=cnt; Ycnt<cnt+(dc_yl*iGLOBAL_SCREENWIDTH); Ycnt+=iGLOBAL_SCREENWIDTH) {
*Ycnt = 36;
}
}
//paint lower black patch in gasmask
for (cnt=b+(dc_yh*iGLOBAL_SCREENWIDTH); cnt<b+(dc_yh*iGLOBAL_SCREENWIDTH)+viewwidth; cnt++) {
for (Ycnt=cnt; Ycnt<b+(viewheight*iGLOBAL_SCREENWIDTH); Ycnt+=iGLOBAL_SCREENWIDTH) {
*Ycnt = 36;
}
}
}
///////////////////////////////////////////////////////////////////////////////////
for (x1=0; x1<=x2; x1++, frac += dc_iscale,b++)
{
ScaleClippedPost(((p->collumnofs[frac>>SFRACBITS])+shape),b);
}
}
}
//******************************************************************************
//
// DrawNormalPost
//
//******************************************************************************
void DrawNormalPost (byte * src, byte * buf)
{
int offset;
int length;
int s;
whereami=40;
while (1)
{
offset=*(src++);
if (offset==0xff)
return;
else
{
length=*(src++);
for (s=0; s<length; s++) {
// Spaced out a little for tracking a bug. Should be equivalent.
byte *saddr = src+s;
byte *daddr = buf + ylookup[offset + s];
byte val = *saddr;
*daddr = val;
// *(buf+ylookup[offset+s])=*(src+s);
}
src+=length;
}
}
}
//******************************************************************************
//
// DrawNormalSprite
//
//******************************************************************************
void DrawNormalSprite (int x, int y, int shapenum)
{
byte *buffer;
int cnt;
byte *shape;
patch_t *p;
byte * b;
int startx;
whereami=41;
shape = W_CacheLumpNum (shapenum, PU_CACHE, Cvt_patch_t, 1);
p = (patch_t *)shape;
if (((x-p->leftoffset)<0) || ((x-p->leftoffset+p->width)>iGLOBAL_SCREENWIDTH))
Error ("DrawNormalSprite: x is out of range x=%d\n",x-p->leftoffset+p->width);
if (((y-p->topoffset)<0) || ((y-p->topoffset+p->height)>iGLOBAL_SCREENHEIGHT))
Error ("DrawNormalSprite: y is out of range y=%d\n",y-p->topoffset+p->height);
startx=x-p->leftoffset;
buffer = (byte*)bufferofs+ylookup[y-p->topoffset];
{
b=buffer+startx;
for (cnt = 0; cnt < p->width; cnt++,b++)
DrawNormalPost ((byte *)(p->collumnofs[cnt]+shape), b);
}
}
void R_DrawColumn (byte * buf)
{
// This is *NOT* 100% correct - DDOI
int count;
int frac, fracstep;
byte *dest;
count = dc_yh - dc_yl + 1;
if (count < 0) return;
dest = buf + ylookup[dc_yl];
fracstep = dc_iscale;
frac = dc_texturemid + (dc_yl-centery)*fracstep;
while (count--) {
//*dest = test++;
*dest = shadingtable[dc_source[(frac>>SFRACBITS)]];
dest += iGLOBAL_SCREENWIDTH;
frac += fracstep;
}
}
void R_TransColumn (byte * buf)
{
int count;
byte *dest;
count = dc_yh - dc_yl + 1;
if (count < 0) return;
dest = buf + ylookup[dc_yl];
while (count--)
{
*dest = shadingtable[*dest];
dest += iGLOBAL_SCREENWIDTH;
}
}
void R_DrawWallColumn (byte * buf)
{
// This is *NOT* 100% correct - DDOI
int count;
int frac, fracstep;
byte *dest;
count = dc_yh - dc_yl;
if (count < 0) return;
dest = buf + ylookup[dc_yl];
fracstep = dc_iscale;
frac = dc_texturemid + (dc_yl-centery)*fracstep;
frac <<= 10;
fracstep <<= 10;
while (count--) {
//*dest = 6;
*dest = shadingtable[dc_source[(((unsigned)frac)>>26)]];
dest += iGLOBAL_SCREENWIDTH;
frac += fracstep;
}
}
void R_DrawClippedColumn (byte * buf)
{
// This is *NOT* 100% correct - DDOI zxcv
int count;
int frac, fracstep;
byte *dest;
// byte *b;int y;
count = dc_yh - dc_yl + 1;
if (count < 0) return;
dest = buf + ylookup[dc_yl];
fracstep = dc_iscale;
frac = dc_texturemid + (dc_yl-centeryclipped)*fracstep;
while (count--) {
*dest = shadingtable[dc_source[(((unsigned)frac)>>SFRACBITS)]];
dest += iGLOBAL_SCREENWIDTH;
frac += fracstep;
}
}
void R_DrawSolidColumn (int color, byte * buf)
{
int count;
byte *dest;
count = dc_yh - dc_yl + 1;
if (count < 0) return;
dest = buf + ylookup[dc_yl];
while (count--)
{
*dest = (byte)color;
dest += iGLOBAL_SCREENWIDTH;
}
}