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Split 1bpp/2bpp drawing

This commit is contained in:
neauoire 2023-11-12 10:20:03 -08:00
parent 805c9258d8
commit 843bbb5195
1 changed files with 31 additions and 12 deletions
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43
src/devices/screen.c
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@ -56,19 +56,35 @@ screen_rect(Uint8 *layer, Uint16 x1, Uint16 y1, Uint16 x2, Uint16 y2, int color)
}
static void
screen_blit(Uint8 *layer, Uint8 *ram, Uint16 addr, Uint16 x1, Uint16 y1, Uint16 color, int flipx, int flipy, int twobpp)
screen_2bpp(Uint8 *layer, Uint8 *ram, Uint16 addr, Uint16 x1, Uint16 y1, Uint16 color, int flipx, int flipy)
{
int v, h, width = uxn_screen.width, height = uxn_screen.height, opaque = (color % 5);
/* TODO: Draw partial tile */
if(x1 + 8 >= width) return;
if(y1 + 8 >= height) return;
Uint8 *ch1 = &ram[addr], *ch2 = ch1 + 8;
for(v = 0; v < 8; v++) {
Uint16 c = ram[(addr + v) & 0xffff] | (twobpp ? (ram[(addr + v + 8) & 0xffff] << 8) : 0);
int y = (y1 + (flipy ? 7 - v : v)) * width;
Uint16 c = *ch1++ | (*ch2++ << 8);
Uint16 y = (y1 + (flipy ? 7 - v : v));
for(h = 7; h >= 0; --h, c >>= 1) {
Uint8 ch = (c & 1) | ((c >> 7) & 2);
if(opaque || ch)
layer[(x1 + (flipx ? 7 - h : h)) + y] = blending[ch][color];
Uint16 x = (x1 + (flipx ? 7 - h : h));
if((opaque || ch) && x < width && y < height)
layer[x + y * width] = blending[ch][color];
}
}
}
static void
screen_1bpp(Uint8 *layer, Uint8 *ram, Uint16 addr, Uint16 x1, Uint16 y1, Uint16 color, int flipx, int flipy)
{
int v, h, width = uxn_screen.width, height = uxn_screen.height, opaque = (color % 5);
Uint8 *ch1 = &ram[addr];
for(v = 0; v < 8; v++) {
Uint16 c = *ch1++;
Uint16 y = (y1 + (flipy ? 7 - v : v));
for(h = 7; h >= 0; --h, c >>= 1) {
Uint8 ch = (c & 1) | ((c >> 7) & 2);
Uint16 x = (x1 + (flipx ? 7 - h : h));
if((opaque || ch) && x < width && y < height)
layer[x + y * width] = blending[ch][color];
}
}
}
@ -93,8 +109,8 @@ static Uint8 arrow[] = {
static void
draw_byte(Uint8 b, Uint16 x, Uint16 y, Uint8 color)
{
screen_blit(uxn_screen.fg, icons, (b >> 4) << 3, x, y, color, 0, 0, 0);
screen_blit(uxn_screen.fg, icons, (b & 0xf) << 3, x + 8, y, color, 0, 0, 0);
screen_1bpp(uxn_screen.fg, icons, (b >> 4) << 3, x, y, color, 0, 0);
screen_1bpp(uxn_screen.fg, icons, (b & 0xf) << 3, x + 8, y, color, 0, 0);
screen_change(x, y, x + 0x10, y + 0x8);
}
@ -116,7 +132,7 @@ screen_debugger(Uxn *u)
0x2;
draw_byte(u->rst.dat[pos], i * 0x18 + 0x8, uxn_screen.height - 0x10, color);
}
screen_blit(uxn_screen.fg, arrow, 0, 0x68, uxn_screen.height - 0x20, 3, 0, 0, 0);
screen_1bpp(uxn_screen.fg, arrow, 0, 0x68, uxn_screen.height - 0x20, 3, 0, 0);
for(i = 0; i < 0x20; i++)
draw_byte(u->ram[i], (i & 0x7) * 0x18 + 0x8, ((i >> 3) << 3) + 0x8, 1 + !!u->ram[i]);
}
@ -253,7 +269,10 @@ screen_deo(Uint8 *ram, Uint8 *d, Uint8 port)
y = PEEK2(port_y), dy = (move & 0x2) << 2, dyx = dy * fx;
addr = PEEK2(port_addr), addr_incr = (move & 0x4) << (1 + twobpp);
for(i = 0; i <= length; i++) {
screen_blit(layer, ram, addr, x + dyx * i, y + dxy * i, color, flipx, flipy, twobpp);
if(twobpp)
screen_2bpp(layer, ram, addr, x + dyx * i, y + dxy * i, color, flipx, flipy);
else
screen_1bpp(layer, ram, addr, x + dyx * i, y + dxy * i, color, flipx, flipy);
addr += addr_incr;
}
screen_change(x, y, x + dyx * length + 8, y + dxy * length + 8);