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Taken some flags out of 2bpp tight lop

This commit is contained in:
neauoire 2023-11-12 11:21:47 -08:00
parent 7827570aec
commit 98c7036252
1 changed files with 9 additions and 7 deletions
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16
src/devices/screen.c
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@ -56,18 +56,20 @@ screen_rect(Uint8 *layer, Uint16 x1, Uint16 y1, Uint16 x2, Uint16 y2, int color)
} }
static void static void
screen_2bpp(Uint8 *layer, Uint8 *ram, Uint16 addr, Uint16 x1, Uint16 y1, Uint16 color, int flipx, int flipy) screen_2bpp(Uint8 *layer, Uint8 *ram, Uint16 addr, Uint16 x1, Uint16 y1, Uint16 color, int fx, int fy)
{ {
int v, h, width = uxn_screen.width, height = uxn_screen.height, opaque = (color % 5); int v, h, width = uxn_screen.width, height = uxn_screen.height, opaque = (color % 5);
Uint8 *ch1 = &ram[addr], *ch2 = ch1 + 8; Uint8 *ch1 = &ram[addr], *ch2 = ch1 + 8, mx = (fx > 0 ? 8 : 0), my = (fy < 0 ? 8 : 0);
Uint16 yy = y1 + my;
for(v = 0; v < 8; v++) { for(v = 0; v < 8; v++) {
Uint16 c = *ch1++ | (*ch2++ << 8); Uint16 c = *ch1++ | (*ch2++ << 8);
Uint16 y = (y1 + (flipy ? 7 - v : v)); Uint16 xx = x1 + mx;
yy += fy;
for(h = 7; h >= 0; --h, c >>= 1) { for(h = 7; h >= 0; --h, c >>= 1) {
Uint8 ch = (c & 1) | ((c >> 7) & 2); Uint8 ch = (c & 1) | ((c >> 7) & 2);
Uint16 x = (x1 + (flipx ? 7 - h : h)); xx += -fx;
if((opaque || ch) && x < width && y < height) if((opaque || ch) && xx < width && yy < height)
layer[x + y * width] = blending[ch][color]; layer[xx + yy * width] = blending[ch][color];
} }
} }
} }
@ -270,7 +272,7 @@ screen_deo(Uint8 *ram, Uint8 *d, Uint8 port)
addr = PEEK2(port_addr), addr_incr = (move & 0x4) << (1 + twobpp); addr = PEEK2(port_addr), addr_incr = (move & 0x4) << (1 + twobpp);
if(twobpp) { if(twobpp) {
for(i = 0; i <= length; i++) { for(i = 0; i <= length; i++) {
screen_2bpp(layer, ram, addr, x + dyx * i, y + dxy * i, color, flipx, flipy); screen_2bpp(layer, ram, addr, x + dyx * i, y + dxy * i, color, fx, fy);
addr += addr_incr; addr += addr_incr;
} }
} else { } else {