ref: d7e016b552696b8f5581f5093f82a598bc0033d6
dir: /vid.c/
#include <u.h> #include <libc.h> #include <draw.h> #include "dat.h" #include "quakedef.h" #include "fns.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(int dy) { int *p, c, *s; if(scale < 2) return; p = (s32int *)fbs; s = (s32int *)fb; dy *= 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(int dy) { uchar *s; int n, we, w8, wr, *d; we = vid.width - 1; w8 = vid.width + 7 >> 3; wr = vid.width % 8; dy *= 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); } /* only exists to allow taking tear-free screenshots ingame... */ static int writebit(void) { int n, fd; char *s; s = va("%s/quake.%ld.bit", fsdir, time(nil)); if(access(s, AEXIST) != -1){ werrstr("writebit: not overwriting %s", 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 flipfb(int dy) { if(resized){ /* skip this frame if window resize */ resized = 0; if(getwindow(display, Refnone) < 0) sysfatal("getwindow: %r"); resetfb(); vid.recalc_refdef = 1; /* force a surface cache flush */ Con_CheckResize(); Con_Clear_f(); return; } drawfb(dy); scalefb(dy); if(scale == 1){ loadimage(fbi, Rect(0,0,vid.width,dy), fb, dy * vid.rowbytes); draw(screen, Rpt(fbr.min, Pt(fbr.max.x, fbr.max.y - vid.height + dy)), 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(va("writebit: %r\n")); dumpwin = 0; } } void setpal(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 initfb(void) { vid.maxwarpwidth = WARP_WIDTH; vid.maxwarpheight = WARP_HEIGHT; vid.numpages = 2; vid.colormap = host_colormap; vid.fullbright = 256 - LittleLong(*((int *)vid.colormap + 2048)); if(initdraw(nil, nil, "quake") < 0) sysfatal("initdraw: %r\n"); resetfb(); }