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Banshee/Voodoo3: Added color support for overlay format 6 (UYVY).

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TODO: check dimensions of the overlay window.
This commit is contained in:
Volker Ruppert 2024-11-10 09:51:58 +01:00
parent a72b336274
commit 48e772b9d0
1 changed files with 28 additions and 10 deletions
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38
bochs/iodev/display/banshee.cc
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@ -517,28 +517,46 @@ void bx_banshee_c::draw_hwcursor(unsigned xc, unsigned yc, bx_svga_tileinfo_t *i
}
}
Bit32u bx_banshee_c::get_overlay_pixel(unsigned x, unsigned y, Bit8u bpp)
Bit32u bx_banshee_c::get_overlay_pixel(unsigned xc, unsigned yc, Bit8u bpp)
{
Bit16u index;
Bit32u value = 0;
unsigned ox, oy;
Bit8u *vid_ptr, yy;
unsigned ox, oy, r, g, b;
Bit8u *vid_ptr, data[4], px, Y[2];
Bit8s U, V;
ox = (unsigned)((double)(x - v->banshee.overlay.x0) * v->banshee.overlay.fx);
oy = (unsigned)((double)(y - v->banshee.overlay.y0) * v->banshee.overlay.fy);
ox = (unsigned)((double)(xc - v->banshee.overlay.x0) * v->banshee.overlay.fx);
oy = (unsigned)((double)(yc - v->banshee.overlay.y0) * v->banshee.overlay.fy);
px = ox & 1;
ox &= ~1;
vid_ptr = &v->fbi.ram[v->banshee.overlay.start & v->fbi.mask] + (ox << 1)
+ (oy * v->banshee.overlay.pitch);
for (unsigned i = 0; i < 4; i++) {
data[i] = *(vid_ptr + i);
}
if (v->banshee.overlay.format == 6) {
yy = *(vid_ptr + 1);
index = ((yy >> 3) << 11) | ((yy >> 2) << 5) | (yy >> 3);
U = data[0] - 0x80;
Y[0] = data[1];
V = data[2] - 0x80;
Y[1] = data[3];
r = (unsigned)(Y[px] + (double)V / 0.877);
if (r > 255) r = 255;
g = (unsigned)(Y[px] - (double)U * 0.39393 - (double)V * 0.58081);
if (g > 255) g = 255;
b = (unsigned)(Y[px] + (double)U / 0.493);
if (b > 255) b = 255;
index = ((r >> 3) << 11) | ((g >> 2) << 5) | (b >> 3);
} else {
index = *(vid_ptr);
index |= *(vid_ptr + 1) << 8;
index = data[px << 1];
index |= data[(px << 1) + 1] << 8;
r = (index & 0xf800) >> 8;
g = (index & 0x07e0) >> 3;
b = (index & 0x1f) << 3;
}
if (bpp == 16) {
value = index;
} else if ((bpp == 24) || (bpp == 32)) {
value = ((index & 0xf800) << 8) | ((index & 0x07e0) << 5) | ((index & 0x001f) << 3);
value = (r << 16) | (g << 8) | b;
}
return value;
}