1994/0804/pc/vgas3.c (diff list | history)

1994/0803/sys/src/9/pc/vgas3.c:16,21 – 1994/0804/sys/src/9/pc/vgas3.c:16,22 (short | long | prev | next)
1994/0803		*/ static Lock s3pagelock; static ulong storage;
1994/0804		static Point hotpoint;
1994/0803		extern Bitmap gscreen;
1994/0803/sys/src/9/pc/vgas3.c:80,94 – 1994/0804/sys/src/9/pc/vgas3.c:81,96
1994/0803		/* * Cursor colours. Set both the CR0[EF] and the colour * stack in case we are using a 16-bit RAMDAC.
1994/0804		* Why are these colours reversed?
1994/0803		*/ vgaxo(Crtx, 0x0E, 0x00); vgaxo(Crtx, 0x0F, 0xFF);
1994/0804		vgaxo(Crtx, 0x0E, 0xFF); vgaxo(Crtx, 0x0F, 0x00);
1994/0803		vgaxi(Crtx, 0x45); for(i = 0; i < 4; i++) vgaxo(Crtx, 0x4A, 0x00);
1994/0804		vgaxo(Crtx, 0x4A, 0xFF);
1994/0803		vgaxi(Crtx, 0x45); for(i = 0; i < 4; i++) vgaxo(Crtx, 0x4B, 0xFF);
1994/0804		vgaxo(Crtx, 0x4B, 0x00);
1994/0803		/* * Find a place for the cursor data in display memory.
1994/0803/sys/src/9/pc/vgas3.c:110,116 – 1994/0804/sys/src/9/pc/vgas3.c:112,118
1994/0803		static void load(Cursor *c) { uchar *and, *xor;
1994/0804		uchar *p;
1994/0803		int x, y; /*
1994/0803/sys/src/9/pc/vgas3.c:118,131 – 1994/0804/sys/src/9/pc/vgas3.c:120,133
1994/0803		* memory so we can update the cursor bitmap. * Set the display page (do we need to restore * the current contents when done?) and the * pointers to the two planes.
1994/0804		* pointer to the two planes. What if this crosses * into a new page?
1994/0803		*/ disable(); lock(&s3pagelock); sets3page(storage>>16); and = ((uchar*)gscreen.base) + (storage & 0xFFFF); xor = and + 512;
1994/0804		p = ((uchar*)gscreen.base) + (storage & 0xFFFF);
1994/0803		/* * The cursor is set in X11 mode which gives the following
1994/0803/sys/src/9/pc/vgas3.c:138,151 – 1994/0804/sys/src/9/pc/vgas3.c:140,157
1994/0803		* Put the cursor into the top-left of the 64x64 array. */ for(y = 0; y < 64; y++){ for(x = 0; x < 8; x++){ if(y < 16 && x < 2){ and[8*y + x] = c->clr[2*y + x]^c->set[2*y + x]; xor[8*y + x] = c->set[2*y + x];
1994/0804		for(x = 0; x < 64/8; x += 2){ if(x < 16/8 && y < 16){ *p++ = c->clr[2*y + x]|c->set[2*y + x]; *p++ = c->clr[2*y + x+1]|c->set[2*y + x+1]; *p++ = c->set[2*y + x]; *p++ = c->set[2*y + x+1];
1994/0803		} else { and[8*y + x] = 0; xor[8*y + x] = 0;
1994/0804		*p++ = 0x00; *p++ = 0x00; *p++ = 0x00; *p++ = 0x00;
1994/0803		} } }
1994/0803/sys/src/9/pc/vgas3.c:152,161 – 1994/0804/sys/src/9/pc/vgas3.c:158,166
1994/0803		unlock(&s3pagelock); /* * Set the cursor offset and enable the cursor.
1994/0804		* Set the cursor hotpoint and enable the cursor.
1994/0803		*/ vgaxo(Crtx, 0x4E, -c->offset.x); vgaxo(Crtx, 0x4F, -c->offset.y);
1994/0804		hotpoint = c->offset;
1994/0803		vsyncactive(); vgaxo(Crtx, 0x45, 0x01); }
1994/0803/sys/src/9/pc/vgas3.c:163,172 – 1994/0804/sys/src/9/pc/vgas3.c:168,200
1994/0803		static int move(Point p) { vgaxo(Crtx, 0x46, (p.x>>8) & 0x07); vgaxo(Crtx, 0x47, p.x & 0xFF); vgaxo(Crtx, 0x49, p.y & 0xFF); vgaxo(Crtx, 0x48, (p.y>>8) & 0x07);
1994/0804		int x, xo, y, yo; /* * Mustn't position the cursor offscreen even partially, * or it disappears. Therefore, if x or y is -ve, adjust the * cursor offset instead. */ if((x = p.x+hotpoint.x) < 0){ xo = -x; xo = ((xo+1)/2)*2; x = 0; } else xo = 0; if((y = p.y+hotpoint.y) < 0){ yo = -y; y = 0; } else yo = 0; vgaxo(Crtx, 0x46, (x>>8) & 0x07); vgaxo(Crtx, 0x47, x & 0xFF); vgaxo(Crtx, 0x49, y & 0xFF); vgaxo(Crtx, 0x4E, xo); vgaxo(Crtx, 0x4F, yo); vgaxo(Crtx, 0x48, (y>>8) & 0x07);
1994/0803		return 0; }