ref: 762a13333eba9d50e5b186e7047f77d541d34d1a
dir: /ref/r_misc.c/
/*
Copyright (C) 1997-2001 Id Software, Inc.
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.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <u.h>
#include <libc.h>
#include <stdio.h>
#include "../dat.h"
#include "../fns.h"
#define NUM_MIPS 4
cvar_t *sw_mipcap;
cvar_t *sw_mipscale;
surfcache_t *d_initial_rover;
qboolean d_roverwrapped;
int d_minmip;
float d_scalemip[NUM_MIPS-1];
static float basemip[NUM_MIPS-1] = {1.0, 0.5*0.8, 0.25*0.8};
extern int d_aflatcolor;
int d_vrectx, d_vrecty, d_vrectright_particle, d_vrectbottom_particle;
int d_pix_min, d_pix_max, d_pix_shift;
int d_scantable[MAXHEIGHT];
short *zspantable[MAXHEIGHT];
/*
================
D_Patch
================
*/
void D_Patch (void)
{
}
/*
================
D_ViewChanged
================
*/
unsigned char *alias_colormap;
void D_ViewChanged (void)
{
int i;
scale_for_mip = xscale;
if (yscale > xscale)
scale_for_mip = yscale;
d_zrowbytes = vid.width * 2;
d_zwidth = vid.width;
d_pix_min = r_refdef.vrect.width / 320;
if (d_pix_min < 1)
d_pix_min = 1;
d_pix_max = (int)((float)r_refdef.vrect.width / (320.0 / 4.0) + 0.5);
d_pix_shift = 8 - (int)((float)r_refdef.vrect.width / 320.0 + 0.5);
if (d_pix_max < 1)
d_pix_max = 1;
d_vrectx = r_refdef.vrect.x;
d_vrecty = r_refdef.vrect.y;
d_vrectright_particle = r_refdef.vrectright - d_pix_max;
d_vrectbottom_particle =
r_refdef.vrectbottom - d_pix_max;
for (i=0 ; i<vid.height; i++)
{
d_scantable[i] = i*r_screenwidth;
zspantable[i] = d_pzbuffer + i*d_zwidth;
}
/*
** clear Z-buffer and color-buffers if we're doing the gallery
*/
if ( r_newrefdef.rdflags & RDF_NOWORLDMODEL )
{
memset( d_pzbuffer, 0xff, vid.width * vid.height * sizeof( d_pzbuffer[0] ) );
Draw_Fill( r_newrefdef.x, r_newrefdef.y, r_newrefdef.width, r_newrefdef.height,( int ) sw_clearcolor->value & 0xff );
}
alias_colormap = vid.colormap;
D_Patch ();
}
/*
=============
R_PrintTimes
=============
*/
void R_PrintTimes (void)
{
int r_time2;
int ms;
r_time2 = Sys_Milliseconds ();
ms = r_time2 - r_time1;
ri.Con_Printf (PRINT_ALL,"%5i ms %3i/%3i/%3i poly %3i surf\n",
ms, c_faceclip, r_polycount, r_drawnpolycount, c_surf);
c_surf = 0;
}
/*
=============
R_PrintDSpeeds
=============
*/
void R_PrintDSpeeds (void)
{
int ms, dp_time, r_time2, rw_time, db_time, se_time, de_time, da_time;
r_time2 = Sys_Milliseconds ();
da_time = (da_time2 - da_time1);
dp_time = (dp_time2 - dp_time1);
rw_time = (rw_time2 - rw_time1);
db_time = (db_time2 - db_time1);
se_time = (se_time2 - se_time1);
de_time = (de_time2 - de_time1);
ms = (r_time2 - r_time1);
ri.Con_Printf (PRINT_ALL,"%3i %2ip %2iw %2ib %2is %2ie %2ia\n",
ms, dp_time, rw_time, db_time, se_time, de_time, da_time);
}
/*
=============
R_PrintAliasStats
=============
*/
void R_PrintAliasStats (void)
{
ri.Con_Printf (PRINT_ALL,"%3i polygon model drawn\n", r_amodels_drawn);
}
/*
===================
R_TransformFrustum
===================
*/
void R_TransformFrustum (void)
{
int i;
vec3_t v, v2;
for (i=0 ; i<4 ; i++)
{
v[0] = screenedge[i].normal[2];
v[1] = -screenedge[i].normal[0];
v[2] = screenedge[i].normal[1];
v2[0] = v[1]*vright[0] + v[2]*vup[0] + v[0]*vpn[0];
v2[1] = v[1]*vright[1] + v[2]*vup[1] + v[0]*vpn[1];
v2[2] = v[1]*vright[2] + v[2]*vup[2] + v[0]*vpn[2];
VectorCopy (v2, view_clipplanes[i].normal);
view_clipplanes[i].dist = DotProduct (modelorg, v2);
}
}
/*
================
TransformVector
================
*/
void TransformVector (vec3_t in, vec3_t out)
{
out[0] = DotProduct(in,vright);
out[1] = DotProduct(in,vup);
out[2] = DotProduct(in,vpn);
}
/*
================
R_TransformPlane
================
*/
void R_TransformPlane (mplane_t *p, float *normal, float *dist)
{
float d;
d = DotProduct (r_origin, p->normal);
*dist = p->dist - d;
// TODO: when we have rotating entities, this will need to use the view matrix
TransformVector (p->normal, normal);
}
/*
===============
R_SetUpFrustumIndexes
===============
*/
void R_SetUpFrustumIndexes (void)
{
int i, j, *pindex;
pindex = r_frustum_indexes;
for (i=0 ; i<4 ; i++)
{
for (j=0 ; j<3 ; j++)
{
if (view_clipplanes[i].normal[j] < 0)
{
pindex[j] = j;
pindex[j+3] = j+3;
}
else
{
pindex[j] = j+3;
pindex[j+3] = j;
}
}
// FIXME: do just once at start
pfrustum_indexes[i] = pindex;
pindex += 6;
}
}
/*
===============
R_ViewChanged
Called every time the vid structure or r_refdef changes.
Guaranteed to be called before the first refresh
===============
*/
void R_ViewChanged (vrect_t *vr)
{
int i;
r_refdef.vrect = *vr;
r_refdef.horizontalFieldOfView = 2*tan((float)r_newrefdef.fov_x/360*M_PI);;
verticalFieldOfView = 2*tan((float)r_newrefdef.fov_y/360*M_PI);
r_refdef.fvrectx = (float)r_refdef.vrect.x;
r_refdef.fvrectx_adj = (float)r_refdef.vrect.x - 0.5;
r_refdef.vrect_x_adj_shift20 = (r_refdef.vrect.x<<20) + (1<<19) - 1;
r_refdef.fvrecty = (float)r_refdef.vrect.y;
r_refdef.fvrecty_adj = (float)r_refdef.vrect.y - 0.5;
r_refdef.vrectright = r_refdef.vrect.x + r_refdef.vrect.width;
r_refdef.vrectright_adj_shift20 = (r_refdef.vrectright<<20) + (1<<19) - 1;
r_refdef.fvrectright = (float)r_refdef.vrectright;
r_refdef.fvrectright_adj = (float)r_refdef.vrectright - 0.5;
r_refdef.vrectrightedge = (float)r_refdef.vrectright - 0.99;
r_refdef.vrectbottom = r_refdef.vrect.y + r_refdef.vrect.height;
r_refdef.fvrectbottom = (float)r_refdef.vrectbottom;
r_refdef.fvrectbottom_adj = (float)r_refdef.vrectbottom - 0.5;
r_refdef.aliasvrect.x = (int)(r_refdef.vrect.x * r_aliasuvscale);
r_refdef.aliasvrect.y = (int)(r_refdef.vrect.y * r_aliasuvscale);
r_refdef.aliasvrect.width = (int)(r_refdef.vrect.width * r_aliasuvscale);
r_refdef.aliasvrect.height = (int)(r_refdef.vrect.height * r_aliasuvscale);
r_refdef.aliasvrectright = r_refdef.aliasvrect.x +
r_refdef.aliasvrect.width;
r_refdef.aliasvrectbottom = r_refdef.aliasvrect.y +
r_refdef.aliasvrect.height;
xOrigin = r_refdef.xOrigin;
yOrigin = r_refdef.yOrigin;
// values for perspective projection
// if math were exact, the values would range from 0.5 to to range+0.5
// hopefully they wll be in the 0.000001 to range+.999999 and truncate
// the polygon rasterization will never render in the first row or column
// but will definately render in the [range] row and column, so adjust the
// buffer origin to get an exact edge to edge fill
xcenter = ((float)r_refdef.vrect.width * XCENTERING) +
r_refdef.vrect.x - 0.5;
aliasxcenter = xcenter * r_aliasuvscale;
ycenter = ((float)r_refdef.vrect.height * YCENTERING) +
r_refdef.vrect.y - 0.5;
aliasycenter = ycenter * r_aliasuvscale;
xscale = r_refdef.vrect.width / r_refdef.horizontalFieldOfView;
aliasxscale = xscale * r_aliasuvscale;
xscaleinv = 1.0 / xscale;
yscale = xscale;
aliasyscale = yscale * r_aliasuvscale;
yscaleinv = 1.0 / yscale;
xscaleshrink = (r_refdef.vrect.width-6)/r_refdef.horizontalFieldOfView;
yscaleshrink = xscaleshrink;
// left side clip
screenedge[0].normal[0] = -1.0 / (xOrigin*r_refdef.horizontalFieldOfView);
screenedge[0].normal[1] = 0;
screenedge[0].normal[2] = 1;
screenedge[0].type = PLANE_ANYZ;
// right side clip
screenedge[1].normal[0] =
1.0 / ((1.0-xOrigin)*r_refdef.horizontalFieldOfView);
screenedge[1].normal[1] = 0;
screenedge[1].normal[2] = 1;
screenedge[1].type = PLANE_ANYZ;
// top side clip
screenedge[2].normal[0] = 0;
screenedge[2].normal[1] = -1.0 / (yOrigin*verticalFieldOfView);
screenedge[2].normal[2] = 1;
screenedge[2].type = PLANE_ANYZ;
// bottom side clip
screenedge[3].normal[0] = 0;
screenedge[3].normal[1] = 1.0 / ((1.0-yOrigin)*verticalFieldOfView);
screenedge[3].normal[2] = 1;
screenedge[3].type = PLANE_ANYZ;
for (i=0 ; i<4 ; i++)
VectorNormalize (screenedge[i].normal);
D_ViewChanged ();
}
/*
===============
R_SetupFrame
===============
*/
void R_SetupFrame (void)
{
int i;
vrect_t vrect;
if (r_fullbright->modified)
{
r_fullbright->modified = false;
D_FlushCaches (); // so all lighting changes
}
r_framecount++;
// build the transformation matrix for the given view angles
VectorCopy (r_refdef.vieworg, modelorg);
VectorCopy (r_refdef.vieworg, r_origin);
AngleVectors (r_refdef.viewangles, vpn, vright, vup);
// current viewleaf
if ( !( r_newrefdef.rdflags & RDF_NOWORLDMODEL ) )
{
r_viewleaf = Mod_PointInLeaf (r_origin, r_worldmodel);
r_viewcluster = r_viewleaf->cluster;
}
if (sw_waterwarp->value && (r_newrefdef.rdflags & RDF_UNDERWATER) )
r_dowarp = true;
else
r_dowarp = false;
if (r_dowarp)
{ // warp into off screen buffer
vrect.x = 0;
vrect.y = 0;
vrect.width = r_newrefdef.width < WARP_WIDTH ? r_newrefdef.width : WARP_WIDTH;
vrect.height = r_newrefdef.height < WARP_HEIGHT ? r_newrefdef.height : WARP_HEIGHT;
d_viewbuffer = r_warpbuffer;
r_screenwidth = WARP_WIDTH;
}
else
{
vrect.x = r_newrefdef.x;
vrect.y = r_newrefdef.y;
vrect.width = r_newrefdef.width;
vrect.height = r_newrefdef.height;
d_viewbuffer = (void *)vid.buffer;
r_screenwidth = vid.rowbytes;
}
R_ViewChanged (&vrect);
// start off with just the four screen edge clip planes
R_TransformFrustum ();
R_SetUpFrustumIndexes ();
// save base values
VectorCopy (vpn, base_vpn);
VectorCopy (vright, base_vright);
VectorCopy (vup, base_vup);
// clear frame counts
c_faceclip = 0;
d_spanpixcount = 0;
r_polycount = 0;
r_drawnpolycount = 0;
r_wholepolycount = 0;
r_amodels_drawn = 0;
r_outofsurfaces = 0;
r_outofedges = 0;
// d_setup
d_roverwrapped = false;
d_initial_rover = sc_rover;
d_minmip = sw_mipcap->value;
if (d_minmip > 3)
d_minmip = 3;
else if (d_minmip < 0)
d_minmip = 0;
for (i=0 ; i<(NUM_MIPS-1) ; i++)
d_scalemip[i] = basemip[i] * sw_mipscale->value;
d_aflatcolor = 0;
}
/*
==============================================================================
SCREEN SHOTS
==============================================================================
*/
/*
==============
WritePCXfile
==============
*/
void WritePCXfile (char *filename, byte *data, int width, int height,
int rowbytes, byte *palette)
{
int i, j, length;
pcx_t *pcx;
byte *pack;
FILE *f;
pcx = (pcx_t *)malloc (width*height*2+1000);
if (!pcx)
return;
pcx->manufacturer = 0x0a; // PCX id
pcx->version = 5; // 256 color
pcx->encoding = 1; // uncompressed
pcx->bits_per_pixel = 8; // 256 color
pcx->xmin = 0;
pcx->ymin = 0;
pcx->xmax = LittleShort((short)(width-1));
pcx->ymax = LittleShort((short)(height-1));
pcx->hres = LittleShort((short)width);
pcx->vres = LittleShort((short)height);
memset (pcx->palette,0,sizeof(pcx->palette));
pcx->color_planes = 1; // chunky image
pcx->bytes_per_line = LittleShort((short)width);
pcx->palette_type = LittleShort(2); // not a grey scale
memset (pcx->filler,0,sizeof(pcx->filler));
// pack the image
pack = &pcx->data;
for (i=0 ; i<height ; i++)
{
for (j=0 ; j<width ; j++)
{
if ( (*data & 0xc0) != 0xc0)
*pack++ = *data++;
else
{
*pack++ = 0xc1;
*pack++ = *data++;
}
}
data += rowbytes - width;
}
// write the palette
*pack++ = 0x0c; // palette ID byte
for (i=0 ; i<768 ; i++)
*pack++ = *palette++;
// write output file
length = pack - (byte *)pcx;
f = fopen (filename, "wb");
if (!f)
ri.Con_Printf (PRINT_ALL, "Failed to open to %s\n", filename);
else
{
fwrite ((void *)pcx, 1, length, f);
fclose (f);
}
free (pcx);
}
/*
==================
R_ScreenShot_f
==================
*/
void R_ScreenShot_f (void)
{
int i;
char pcxname[80];
char checkname[MAX_OSPATH];
FILE *f;
byte palette[768];
// create the scrnshots directory if it doesn't exist
Com_sprintf (checkname, sizeof(checkname), "%s/scrnshot", ri.FS_Gamedir());
Sys_Mkdir (checkname);
//
// find a file name to save it to
//
strcpy(pcxname,"quake00.pcx");
for (i=0 ; i<=99 ; i++)
{
pcxname[5] = i/10 + '0';
pcxname[6] = i%10 + '0';
Com_sprintf (checkname, sizeof(checkname), "%s/scrnshot/%s", ri.FS_Gamedir(), pcxname);
f = fopen (checkname, "r");
if (!f)
break; // file doesn't exist
fclose (f);
}
if (i==100)
{
ri.Con_Printf (PRINT_ALL, "R_ScreenShot_f: Couldn't create a PCX");
return;
}
// turn the current 32 bit palette into a 24 bit palette
for (i=0 ; i<256 ; i++)
{
palette[i*3+0] = sw_state.currentpalette[i*4+0];
palette[i*3+1] = sw_state.currentpalette[i*4+1];
palette[i*3+2] = sw_state.currentpalette[i*4+2];
}
//
// save the pcx file
//
WritePCXfile (checkname, vid.buffer, vid.width, vid.height, vid.rowbytes,
palette);
ri.Con_Printf (PRINT_ALL, "Wrote %s\n", checkname);
}