ref: ec1c1b9b52632a5af59f37c1330573b78775cce1
dir: /sys/src/9/bcm/screen.c/
/* * bcm2385 framebuffer */ #include "u.h" #include "../port/lib.h" #include "mem.h" #include "dat.h" #include "fns.h" #define Image IMAGE #include <draw.h> #include <memdraw.h> #include <cursor.h> #include "screen.h" enum { Tabstop = 4, Scroll = 8, Wid = 1024, Ht = 768, Depth = 16, }; Memimage *gscreen; static Memdata xgdata; static Memimage xgscreen = { { 0, 0, Wid, Ht }, /* r */ { 0, 0, Wid, Ht }, /* clipr */ Depth, /* depth */ 3, /* nchan */ RGB16, /* chan */ nil, /* cmap */ &xgdata, /* data */ 0, /* zero */ 0, /* width in words of a single scan line */ 0, /* layer */ 0, /* flags */ }; static Memimage *conscol; static Memimage *back; static Memsubfont *memdefont; static Lock screenlock; static Point curpos; static int h, w; static Rectangle window; static void myscreenputs(char *s, int n); static void screenputc(char *buf); static void screenwin(void); void cursoron(void) { qlock(&drawlock); lock(&cursor); swcursorhide(); swcursordraw(mousexy()); unlock(&cursor); qunlock(&drawlock); } void cursoroff(void) { qlock(&drawlock); lock(&cursor); swcursorhide(); unlock(&cursor); qunlock(&drawlock); } /* called from devmouse */ void setcursor(Cursor* curs) { swcursorload(curs); } int hwdraw(Memdrawparam *par) { Memimage *dst, *src, *mask; if((dst=par->dst) == nil || dst->data == nil) return 0; if((src=par->src) == nil || src->data == nil) return 0; if((mask=par->mask) == nil || mask->data == nil) return 0; if(dst->data->bdata == xgdata.bdata) swcursoravoid(par->r); if(src->data->bdata == xgdata.bdata) swcursoravoid(par->sr); if(mask->data->bdata == xgdata.bdata) swcursoravoid(par->mr); return 0; } static int screensize(void) { char *p; char *f[3]; int width, height, depth; p = getconf("vgasize"); if(p == nil || getfields(p, f, nelem(f), 0, "x") != nelem(f) || (width = atoi(f[0])) < 16 || (height = atoi(f[1])) <= 0 || (depth = atoi(f[2])) <= 0) return -1; xgscreen.r.max = Pt(width, height); xgscreen.depth = depth; return 0; } void screeninit(void) { uchar *fb; int set; ulong chan; set = screensize() == 0; fb = fbinit(set, &xgscreen.r.max.x, &xgscreen.r.max.y, &xgscreen.depth); if(fb == nil){ print("can't initialise %dx%dx%d framebuffer \n", xgscreen.r.max.x, xgscreen.r.max.y, xgscreen.depth); return; } xgscreen.clipr = xgscreen.r; switch(xgscreen.depth){ default: print("unsupported screen depth %d\n", xgscreen.depth); xgscreen.depth = 16; /* fall through */ case 16: chan = RGB16; break; case 24: chan = BGR24; break; case 32: chan = ARGB32; break; } memsetchan(&xgscreen, chan); conf.monitor = 1; xgdata.bdata = fb; xgdata.ref = 1; gscreen = &xgscreen; gscreen->width = wordsperline(gscreen->r, gscreen->depth); memimageinit(); memdefont = getmemdefont(); screenwin(); screenputs = myscreenputs; swcursorinit(); } void flushmemscreen(Rectangle) { } uchar* attachscreen(Rectangle *r, ulong *chan, int* d, int *width, int *softscreen) { *r = gscreen->r; *d = gscreen->depth; *chan = gscreen->chan; *width = gscreen->width; *softscreen = 0; return gscreen->data->bdata; } void getcolor(ulong p, ulong *pr, ulong *pg, ulong *pb) { USED(p, pr, pg, pb); } int setcolor(ulong p, ulong r, ulong g, ulong b) { USED(p, r, g, b); return 0; } void blankscreen(int blank) { fbblank(blank); } static void myscreenputs(char *s, int n) { int i; Rune r; char buf[4]; if(!islo()) { /* don't deadlock trying to print in interrupt */ if(!canlock(&screenlock)) return; } else lock(&screenlock); while(n > 0){ i = chartorune(&r, s); if(i == 0){ s++; --n; continue; } memmove(buf, s, i); buf[i] = 0; n -= i; s += i; screenputc(buf); } unlock(&screenlock); } static void screenwin(void) { char *greet; Memimage *orange; Point p, q; Rectangle r; back = memwhite; conscol = memblack; orange = allocmemimage(Rect(0, 0, 1, 1), RGB16); orange->flags |= Frepl; orange->clipr = gscreen->r; orange->data->bdata[0] = 0x40; /* magic: colour? */ orange->data->bdata[1] = 0xfd; /* magic: colour? */ w = memdefont->info[' '].width; h = memdefont->height; r = insetrect(gscreen->r, 4); memimagedraw(gscreen, r, memblack, ZP, memopaque, ZP, S); window = insetrect(r, 4); memimagedraw(gscreen, window, memwhite, ZP, memopaque, ZP, S); memimagedraw(gscreen, Rect(window.min.x, window.min.y, window.max.x, window.min.y + h + 5 + 6), orange, ZP, nil, ZP, S); freememimage(orange); window = insetrect(window, 5); greet = " Plan 9 Console "; p = addpt(window.min, Pt(10, 0)); q = memsubfontwidth(memdefont, greet); memimagestring(gscreen, p, conscol, ZP, memdefont, greet); flushmemscreen(r); window.min.y += h + 6; curpos = window.min; window.max.y = window.min.y + ((window.max.y - window.min.y) / h) * h; } static void scroll(void) { int o; Point p; Rectangle r; o = Scroll*h; r = Rpt(window.min, Pt(window.max.x, window.max.y-o)); p = Pt(window.min.x, window.min.y+o); memimagedraw(gscreen, r, gscreen, p, nil, p, S); flushmemscreen(r); r = Rpt(Pt(window.min.x, window.max.y-o), window.max); memimagedraw(gscreen, r, back, ZP, nil, ZP, S); flushmemscreen(r); curpos.y -= o; } static void screenputc(char *buf) { int w; uint pos; Point p; Rectangle r; static int *xp; static int xbuf[256]; if (xp < xbuf || xp >= &xbuf[nelem(xbuf)]) xp = xbuf; switch (buf[0]) { case '\n': if (curpos.y + h >= window.max.y) scroll(); curpos.y += h; screenputc("\r"); break; case '\r': xp = xbuf; curpos.x = window.min.x; break; case '\t': p = memsubfontwidth(memdefont, " "); w = p.x; if (curpos.x >= window.max.x - Tabstop * w) screenputc("\n"); pos = (curpos.x - window.min.x) / w; pos = Tabstop - pos % Tabstop; *xp++ = curpos.x; r = Rect(curpos.x, curpos.y, curpos.x + pos * w, curpos.y + h); memimagedraw(gscreen, r, back, back->r.min, nil, back->r.min, S); flushmemscreen(r); curpos.x += pos * w; break; case '\b': if (xp <= xbuf) break; xp--; r = Rect(*xp, curpos.y, curpos.x, curpos.y + h); memimagedraw(gscreen, r, back, back->r.min, nil, back->r.min, S); flushmemscreen(r); curpos.x = *xp; break; case '\0': break; default: p = memsubfontwidth(memdefont, buf); w = p.x; if (curpos.x >= window.max.x - w) screenputc("\n"); *xp++ = curpos.x; r = Rect(curpos.x, curpos.y, curpos.x + w, curpos.y + h); memimagedraw(gscreen, r, back, back->r.min, nil, back->r.min, S); memimagestring(gscreen, curpos, conscol, ZP, memdefont, buf); flushmemscreen(r); curpos.x += w; break; } }