1992/1109/pc/vga.c (diff list | history)

1992/1108/sys/src/9/pc/vga.c:233,242 – 1992/1109/sys/src/9/pc/vga.c:233,245 (short | long | prev | next)
1992/1106		mbb = NULLMBB; /* * zero hard screen
1992/1109		* zero hard screen and setup a bitmap for the new size
1992/1106		*/ memset((void*)SCREENMEM, 0xff, 64*1024); vgascreen.ldepth = 0;
1992/1109		if(ldepth == 3) vgascreen.ldepth = 3; else vgascreen.ldepth = 0;
1992/1106		vgascreen.base = (void*)SCREENMEM; vgascreen.width = (maxx*(1<<ldepth))/32; vgascreen.r.max = Pt(maxx, maxy);
1992/1108/sys/src/9/pc/vga.c:243,249 – 1992/1109/sys/src/9/pc/vga.c:246,252
1992/1106		vgascreen.clipr.max = vgascreen.r.max; /* * setup new soft screen
1992/1109		* setup new soft screen, free memory for old screen
1992/1106		*/ gscreen.ldepth = ldepth; gscreen.width = (maxx*(1<<ldepth))/32;
1992/1108/sys/src/9/pc/vga.c:250,256 – 1992/1109/sys/src/9/pc/vga.c:253,263
1992/0603		gscreen.r.max = Pt(maxx, maxy);
1992/0604		gscreen.clipr.max = gscreen.r.max;
1992/1106		len = gscreen.width * 4 * maxy;
1992/1107		gscreen.base = ((ulong*)malloc(len+2*1024))+256;
1992/1109		if(gscreen.base){ free(gscreen.base); gscreen.base = ((ulong*)smalloc(len+2*1024))+256; } else gscreen.base = ((ulong*)malloc(len+2*1024))+256;
1992/1107		memset((char*)gscreen.base, 0xff, len);
1992/1106		/*
1992/1108/sys/src/9/pc/vga.c:334,340 – 1992/1109/sys/src/9/pc/vga.c:341,347
1992/1108		screenupdate(void) { uchar *sp, *hp; int y, len, incs, inch;
1992/1109		int y, len, incs, inch, bits;
1992/1108		Rectangle r; r = mbb;
1992/1108/sys/src/9/pc/vga.c:352,360 – 1992/1109/sys/src/9/pc/vga.c:359,368
1992/1108		if(r.max.y > gscreen.r.max.y) r.max.y = gscreen.r.max.y;
1992/1109		bits = 1<<vgascreen.ldepth;
1992/1108		sp = (uchar*)gaddr(&gscreen, r.min); hp = (uchar*)gaddr(&vgascreen, r.min); len = (r.max.x + 31)/32 - r.min.x/32;
1992/1109		len = (r.max.x*bits + 31)/32 - (r.min.x*bits)/32;
1992/1108		len *= BY2WD; if(len <= 0) return;
1992/1108/sys/src/9/pc/vga.c:364,369 – 1992/1109/sys/src/9/pc/vga.c:372,379
1992/1108		switch(gscreen.ldepth){ case 0:
1992/1109		case 3: /* reverse the bits */
1992/1108		for (y = r.min.y; y < r.max.y; y++){ l0update(sp, hp, len); sp += incs;
1992/1108/sys/src/9/pc/vga.c:371,376 – 1992/1109/sys/src/9/pc/vga.c:381,387
1992/1108		} break; case 1:
1992/1109		/* reverse the bits and split into 2 bitmaps */
1992/1108		for (y = r.min.y; y < r.max.y; y++){ l1update(sp, hp, len); sp += incs;