ref: 3ba533fb9d5e013768813983fc0a4464f4ba13ac
dir: qk1/qw/vid.c
#include <u.h>
#include <libc.h>
#include <draw.h>
#include <stdio.h>
#include "quakedef.h"
viddef_t vid; /* global video state */
int resized;
int dumpwin, scaleon;
Point center; /* of window */
Rectangle grabr;
static int scale = 1;
static s32int fbpal[256];
static uchar *fb, *fbs;
static Image *fbi;
static Rectangle fbr;
static void
scalefb(void)
{
int *p, c, *s, dy;
if(scale < 2)
return;
p = (s32int *)fbs;
s = (s32int *)fb;
dy = vid.height * vid.width;
while(dy-- > 0){
c = *s++;
switch(scale){
case 16: p[15] = c;
case 15: p[14] = c;
case 14: p[13] = c;
case 13: p[12] = c;
case 12: p[11] = c;
case 11: p[10] = c;
case 10: p[9] = c;
case 9: p[8] = c;
case 8: p[7] = c;
case 7: p[6] = c;
case 6: p[5] = c;
case 5: p[4] = c;
case 4: p[3] = c;
case 3: p[2] = c;
case 2: p[1] = c; p[0] = c;
}
p += scale;
}
}
static void
drawfb(void)
{
uchar *s;
int n, dy, we, w8, wr, *d;
we = vid.width - 1;
w8 = vid.width + 7 >> 3;
wr = vid.width % 8;
dy = vid.height * vid.rowbytes;
while((dy -= vid.rowbytes) >= 0){
s = fb + dy;
d = ((int *)s) + we;
s += we;
n = w8;
switch(wr){
case 0: do{ *d-- = fbpal[*s--];
case 7: *d-- = fbpal[*s--];
case 6: *d-- = fbpal[*s--];
case 5: *d-- = fbpal[*s--];
case 4: *d-- = fbpal[*s--];
case 3: *d-- = fbpal[*s--];
case 2: *d-- = fbpal[*s--];
case 1: *d-- = fbpal[*s--];
}while(--n > 0);
}
}
}
static void
resetfb(void)
{
static int highhunk;
void *surfcache;
int hunkvbuf, scachesz;
Point p;
if(scaleon){
scale = Dx(screen->r) / vid.width;
if(scale <= 0)
scale = 1;
else if(scale > 16)
scale = 16;
}else{
vid.width = Dx(screen->r);
vid.height = Dy(screen->r);
}
if(d_pzbuffer != nil){
D_FlushCaches();
Hunk_FreeToHighMark(highhunk);
d_pzbuffer = nil;
}
highhunk = Hunk_HighMark();
// alloc an extra line in case we want to wrap, and allocate the z-buffer
hunkvbuf = vid.width * vid.height * sizeof *d_pzbuffer;
scachesz = D_SurfaceCacheForRes(vid.width, vid.height);
hunkvbuf += scachesz;
if((d_pzbuffer = Hunk_HighAllocName(hunkvbuf, "video")) == nil)
sysfatal("Not enough memory for video mode\n");
surfcache = (byte *)d_pzbuffer + vid.width * vid.height * sizeof *d_pzbuffer;
D_InitCaches(surfcache, scachesz);
vid.rowbytes = vid.width * sizeof *fbpal;
vid.aspect = (float)vid.height / (float)vid.width * (320.0/240.0);
vid.conrowbytes = vid.rowbytes;
vid.conwidth = vid.width;
vid.conheight = vid.height;
center = divpt(addpt(screen->r.min, screen->r.max), 2);
p = Pt(scale * vid.width/2, scale * vid.height/2);
fbr = Rpt(subpt(center, p), addpt(center, p));
p = Pt(vid.width/4, vid.height/4);
grabr = Rpt(subpt(center, p), addpt(center, p));
freeimage(fbi);
free(fb);
fbi = allocimage(display,
Rect(0, 0, vid.width * scale, scale > 1 ? 1 : vid.height),
XRGB32, scale > 1, 0);
if(fbi == nil)
sysfatal("resetfb: %r (%d %d)", vid.width, vid.height);
fb = emalloc(vid.rowbytes * vid.height);
if(scaleon){
free(fbs);
fbs = emalloc(vid.rowbytes * scale * vid.height);
}
vid.buffer = fb;
vid.conbuffer = fb;
draw(screen, screen->r, display->black, nil, ZP);
}
void
VID_Init(uchar *)
{
int n;
n = COM_CheckParm("-scale");
if(n && n < com_argc-2){
scaleon = 1;
vid.width = strtol(com_argv[n+1], nil, 0);
vid.height = strtol(com_argv[n+2], nil, 0);
if(vid.width < 320 || vid.height < 200)
sysfatal("invalid scale resolution");
}
vid.maxwarpwidth = WARP_WIDTH;
vid.maxwarpheight = WARP_HEIGHT;
vid.numpages = 2;
vid.colormap = host_colormap;
vid.fullbright = 256 - LittleLong(*((int *)vid.colormap + 2048));
srand(getpid());
if(initdraw(nil, nil, "quake") < 0)
sysfatal("initdraw: %r\n");
resetfb();
}
void
VID_ShiftPalette(uchar *p)
{
VID_SetPalette(p);
}
void
VID_SetPalette(uchar *p)
{
int *fp;
for(fp=fbpal; fp<fbpal+nelem(fbpal); p+=3)
*fp++ = p[0] << 16 | p[1] << 8 | p[2];
scr_fullupdate = 0;
}
void
VID_Shutdown(void)
{
free(fb);
free(fbs);
freeimage(fbi);
}
/* only exists to allow taking tear-free screenshots ingame... */
static int
writebit(void)
{
int n, fd;
char *s;
s = va("%s/quake.%d.bit", com_gamedir, time(nil));
if(access(s, AEXIST) != -1){
fprint(2, "writebit: not overwriting %s\n", s);
return -1;
}
if(fd = create(s, OWRITE, 0644), fd < 0)
return -1;
n = writeimage(fd, fbi, 0);
close(fd);
if(n >= 0)
Con_Printf("Wrote %s\n", s);
return n;
}
void
VID_Update(vrect_t *)
{
if(resized){ /* skip this frame if window resize */
resized = 0;
if(getwindow(display, Refnone) < 0)
sysfatal("VID_Update:getwindow: %r\n");
resetfb();
vid.recalc_refdef = 1; /* force a surface cache flush */
Con_CheckResize();
Con_Clear_f();
return;
}
drawfb();
scalefb();
if(scale == 1){
loadimage(fbi, Rect(0,0,vid.width,vid.height), fb, vid.height * vid.rowbytes);
draw(screen, fbr, fbi, nil, ZP);
}else{
Rectangle r;
uchar *p;
p = fbs;
r = fbr;
while(r.min.y < fbr.max.y){
r.max.y = r.min.y + scale;
p += loadimage(fbi, fbi->r, p, vid.rowbytes * scale);
draw(screen, r, fbi, nil, ZP);
r.min.y = r.max.y;
}
}
flushimage(display, 1);
if(dumpwin){
if(writebit() < 0)
Con_Printf("Could not write screenshot.\n");
dumpwin = 0;
}
}
/* direct drawing of the "accessing disk" icon */
void
D_BeginDirectRect(int /*x*/, int /*y*/, byte */*pbitmap*/, int /*width*/, int /*height*/)
{
}
void
D_EndDirectRect(int /*x*/, int /*y*/, int /*width*/, int /*height*/)
{
}
void VID_LockBuffer (void)
{
}
void VID_UnlockBuffer (void)
{
}