uxn

Varvara Ordinator, written in ANSI C(SDL2)
git clone https://git.eamoncaddigan.net/uxn.git
Log | Files | Refs | README | LICENSE

commit 011662e1dd3e5544320fef5ec498c3ca086e8601
parent 163d48ec343ab373182ee9075667c2e5f0185a5f
Author: Devine Lu Linvega <aliceffekt@gmail.com>
Date:   Wed,  3 Jan 2024 09:05:16 -0800

(screen) cache elements of the auto byte

Diffstat:
Msrc/devices/screen.c | 26++++++++++++--------------
1 file changed, 12 insertions(+), 14 deletions(-)

diff --git a/src/devices/screen.c b/src/devices/screen.c @@ -200,7 +200,7 @@ screen_redraw(Uxn *u) /* cache */ -static Uint16 rX, rY, rA; +static Uint16 rX, rY, rA, rMX, rMY, rMA, rML; Uint8 screen_dei(Uxn *u, Uint8 addr) @@ -227,6 +227,7 @@ screen_deo(Uint8 *ram, Uint8 *d, Uint8 port) switch(port) { case 0x3: screen_resize(PEEK2(d + 2), uxn_screen.height); break; case 0x5: screen_resize(uxn_screen.width, PEEK2(d + 4)); break; + case 0x6: rMX = d[0x6] & 0x1, rMY = d[0x6] & 0x2, rMA = d[0x6] & 0x4, rML = d[0x6] >> 4; break; case 0x8: case 0x9: rX = (d[0x8] << 8) | d[0x9]; break; case 0xa: @@ -253,43 +254,40 @@ screen_deo(Uint8 *ram, Uint8 *d, Uint8 port) } /* pixel mode */ else { - Uint8 move = d[0x6]; Uint16 w = uxn_screen.width; if(rX < w && rY < uxn_screen.height) layer[rX + rY * w] = color; screen_change(rX, rY, rX + 1, rY + 1); - if(move & 0x1) rX++; - if(move & 0x2) rY++; + if(rMX) rX++; + if(rMY) rY++; } break; } case 0xf: { Uint8 i; Uint8 ctrl = d[0xf]; - Uint8 move = d[0x6]; - Uint8 length = move >> 4; Uint8 twobpp = !!(ctrl & 0x80); Uint8 color = ctrl & 0xf; Uint8 *layer = ctrl & 0x40 ? uxn_screen.fg : uxn_screen.bg; int fx = ctrl & 0x10 ? -1 : 1; int fy = ctrl & 0x20 ? -1 : 1; - dx = (move & 0x1) << 3, dxy = dx * fy; - dy = (move & 0x2) << 2, dyx = dy * fx; - addr_incr = (move & 0x4) << (1 + twobpp); + dx = rMX << 3, dxy = dx * fy; + dy = rMY << 2, dyx = dy * fx; + addr_incr = rMA << (1 + twobpp); if(twobpp) { - for(i = 0; i <= length; i++) { + for(i = 0; i <= rML; i++) { screen_2bpp(layer, &ram[rA], rX + dyx * i, rY + dxy * i, color, fx, fy); rA += addr_incr; } } else { - for(i = 0; i <= length; i++) { + for(i = 0; i <= rML; i++) { screen_1bpp(layer, &ram[rA], rX + dyx * i, rY + dxy * i, color, fx, fy); rA += addr_incr; } } - screen_change(rX, rY, rX + dyx * length + 8, rY + dxy * length + 8); - if(move & 0x1) rX += dx * fx; - if(move & 0x2) rY += dy * fy; + screen_change(rX, rY, rX + dyx * rML + 8, rY + dxy * rML + 8); + if(rMX) rX += dx * fx; + if(rMY) rY += dy * fy; break; } }