Faster screen drawing
This commit is contained in:
Devine Lu Linvega
parent
e247b86471
commit
71c8d44051
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@ -20,9 +20,8 @@ static int tids[8];
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static Uint16 link_vectors[8];
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static Uint8 *link_ram;
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static void
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*
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link_eval(void *x)
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static void *
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link_eval(void *x)
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{
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int tid = *((int *)x);
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Uxn u;
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@ -217,6 +217,10 @@ screen_redraw(Uxn *u)
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}
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}
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/* screen registers */
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static Uint16 rX, rY, rA, rMX, rMY, rMA, rML, rDX, rDY;
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Uint8
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screen_dei(Uxn *u, Uint8 addr)
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{
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@ -225,6 +229,12 @@ screen_dei(Uxn *u, Uint8 addr)
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case 0x23: return uxn_screen.width;
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case 0x24: return uxn_screen.height >> 8;
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case 0x25: return uxn_screen.height;
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case 0x28: return rX >> 8;
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case 0x29: return rX;
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case 0x2a: return rY >> 8;
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case 0x2b: return rY;
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case 0x2c: return rA >> 8;
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case 0x2d: return rA;
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default: return u->dev[addr];
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}
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}
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@ -232,83 +242,64 @@ screen_dei(Uxn *u, Uint8 addr)
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void
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screen_deo(Uint8 *ram, Uint8 *d, Uint8 port)
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{
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Uint8 *port_x, *port_y, *port_addr;
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Uint16 x, y, dx, dy, dxy, dyx, addr, addr_incr;
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switch(port) {
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case 0x3: {
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Uint8 *port_width = d + 0x2;
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screen_resize(PEEK2(port_width), uxn_screen.height, uxn_screen.scale);
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} break;
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case 0x5: {
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Uint8 *port_height = d + 0x4;
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screen_resize(uxn_screen.width, PEEK2(port_height), uxn_screen.scale);
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} break;
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case 0x3: screen_resize(PEEK2(d + 2), uxn_screen.height, uxn_screen.scale); return;
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case 0x5: screen_resize(uxn_screen.width, PEEK2(d + 4), uxn_screen.scale); return;
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case 0x6: rMX = d[0x6] & 0x1, rMY = d[0x6] & 0x2, rMA = d[0x6] & 0x4, rML = d[0x6] >> 4, rDX = rMX << 3, rDY = rMY << 2; return;
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case 0x8:
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case 0x9: rX = (d[0x8] << 8) | d[0x9]; return;
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case 0xa:
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case 0xb: rY = (d[0xa] << 8) | d[0xb]; return;
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case 0xc:
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case 0xd: rA = (d[0xc] << 8) | d[0xd]; return;
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case 0xe: {
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Uint8 ctrl = d[0xe];
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Uint8 color = ctrl & 0x3;
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Uint8 *layer = (ctrl & 0x40) ? uxn_screen.fg : uxn_screen.bg;
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port_x = d + 0x8, port_y = d + 0xa;
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x = PEEK2(port_x);
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y = PEEK2(port_y);
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Uint8 *layer = ctrl & 0x40 ? uxn_screen.fg : uxn_screen.bg;
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/* fill mode */
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if(ctrl & 0x80) {
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Uint16 x2 = uxn_screen.width, y2 = uxn_screen.height;
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if(ctrl & 0x10) x2 = x, x = 0;
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if(ctrl & 0x20) y2 = y, y = 0;
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if(!x && !y && x2 == uxn_screen.width && y2 == uxn_screen.height)
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screen_fill(layer, color);
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Uint16 x1, y1, x2, y2;
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if(ctrl & 0x10)
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x1 = 0, x2 = rX;
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else
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screen_rect(layer, x, y, x2, y2, color);
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screen_change(x, y, x2, y2);
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x1 = rX, x2 = uxn_screen.width;
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if(ctrl & 0x20)
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y1 = 0, y2 = rY;
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else
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y1 = rY, y2 = uxn_screen.height;
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screen_rect(layer, x1, y1, x2, y2, color);
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screen_change(x1, y1, x2, y2);
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}
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/* pixel mode */
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else {
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Uint16 w = uxn_screen.width, h = uxn_screen.height;
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if(x < w && y < h)
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layer[x + y * w] = color;
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screen_change(x, y, x + 1, y + 1);
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if(d[0x6] & 0x1) POKE2(port_x, x + 1);
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if(d[0x6] & 0x2) POKE2(port_y, y + 1);
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Uint16 w = uxn_screen.width;
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if(rX < w && rY < uxn_screen.height)
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layer[rX + rY * w] = color;
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screen_change(rX, rY, rX + 1, rY + 1);
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if(rMX) rX++;
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if(rMY) rY++;
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}
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break;
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return;
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}
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case 0xf: {
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Uint8 i;
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Uint8 ctrl = d[0xf];
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Uint8 move = d[0x6];
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Uint8 length = move >> 4;
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Uint8 twobpp = !!(ctrl & 0x80);
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Uint8 *layer = (ctrl & 0x40) ? uxn_screen.fg : uxn_screen.bg;
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Uint8 color = ctrl & 0xf;
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int flipx = (ctrl & 0x10), fx = flipx ? -1 : 1;
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int flipy = (ctrl & 0x20), fy = flipy ? -1 : 1;
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port_x = d + 0x8, port_y = d + 0xa;
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port_addr = d + 0xc;
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x = PEEK2(port_x), dx = (move & 0x1) << 3, dxy = dx * fy;
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y = PEEK2(port_y), dy = (move & 0x2) << 2, dyx = dy * fx;
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addr = PEEK2(port_addr), addr_incr = (move & 0x4) << (1 + twobpp);
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if(twobpp) {
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for(i = 0; i <= length; i++) {
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screen_2bpp(layer, &ram[addr], x + dyx * i, y + dxy * i, color, fx, fy);
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addr += addr_incr;
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}
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} else {
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for(i = 0; i <= length; i++) {
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screen_1bpp(layer, &ram[addr], x + dyx * i, y + dxy * i, color, fx, fy);
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addr += addr_incr;
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}
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}
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screen_change(x, y, x + dyx * length + 8, y + dxy * length + 8);
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if(move & 0x1) {
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x = x + dx * fx;
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POKE2(port_x, x);
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}
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if(move & 0x2) {
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y = y + dy * fy;
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POKE2(port_y, y);
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}
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if(move & 0x4) POKE2(port_addr, addr); /* auto addr+length */
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break;
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Uint8 *layer = ctrl & 0x40 ? uxn_screen.fg : uxn_screen.bg;
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int fx = ctrl & 0x10 ? -1 : 1;
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int fy = ctrl & 0x20 ? -1 : 1;
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Uint16 dxy = rDX * fy, dyx = rDY * fx, addr_incr = rMA << (1 + twobpp);
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if(twobpp)
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for(i = 0; i <= rML; i++, rA += addr_incr)
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screen_2bpp(layer, &ram[rA], rX + dyx * i, rY + dxy * i, color, fx, fy);
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else
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for(i = 0; i <= rML; i++, rA += addr_incr)
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screen_1bpp(layer, &ram[rA], rX + dyx * i, rY + dxy * i, color, fx, fy);
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screen_change(rX, rY, rX + dyx * rML + 8, rY + dxy * rML + 8);
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if(rMX) rX += rDX * fx;
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if(rMY) rY += rDY * fy;
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return;
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}
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}
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}
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