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Move fog boundary drawing to r_fogboundary

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This commit is contained in:
Magnus Norddahl 2016-12-31 12:04:23 +01:00
commit 2f96dcc1a8
6 changed files with 158 additions and 102 deletions
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100
src/swrenderer/scene/r_plane.cpp
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@ -115,109 +115,9 @@ short spanend[MAXHEIGHT];
void R_DrawSinglePlane (visplane_t *, fixed_t alpha, bool additive, bool masked);
void R_DrawFogBoundarySection(int y, int y2, int x1)
{
for (; y < y2; ++y)
{
R_Drawers()->DrawFogBoundaryLine(y, x1, spanend[y]);
}
}
//==========================================================================
void R_DrawFogBoundary(int x1, int x2, short *uclip, short *dclip)
{
// This is essentially the same as R_MapVisPlane but with an extra step
// to create new horizontal spans whenever the light changes enough that
// we need to use a new colormap.
double lightstep = rw_lightstep;
double light = rw_light + rw_lightstep*(x2 - x1 - 1);
int x = x2 - 1;
int t2 = uclip[x];
int b2 = dclip[x];
int rcolormap = GETPALOOKUP(light, wallshade);
int lcolormap;
uint8_t *basecolormapdata = basecolormap->Maps;
if (b2 > t2)
{
fillshort(spanend + t2, b2 - t2, x);
}
R_SetColorMapLight(basecolormap, (float)light, wallshade);
uint8_t *fake_dc_colormap = basecolormap->Maps + (GETPALOOKUP(light, wallshade) << COLORMAPSHIFT);
for (--x; x >= x1; --x)
{
int t1 = uclip[x];
int b1 = dclip[x];
const int xr = x + 1;
int stop;
light -= rw_lightstep;
lcolormap = GETPALOOKUP(light, wallshade);
if (lcolormap != rcolormap)
{
if (t2 < b2 && rcolormap != 0)
{ // Colormap 0 is always the identity map, so rendering it is
// just a waste of time.
R_DrawFogBoundarySection(t2, b2, xr);
}
if (t1 < t2) t2 = t1;
if (b1 > b2) b2 = b1;
if (t2 < b2)
{
fillshort(spanend + t2, b2 - t2, x);
}
rcolormap = lcolormap;
R_SetColorMapLight(basecolormap, (float)light, wallshade);
fake_dc_colormap = basecolormap->Maps + (GETPALOOKUP(light, wallshade) << COLORMAPSHIFT);
}
else
{
if (fake_dc_colormap != basecolormapdata)
{
stop = MIN(t1, b2);
while (t2 < stop)
{
int y = t2++;
R_Drawers()->DrawFogBoundaryLine(y, xr, spanend[y]);
}
stop = MAX(b1, t2);
while (b2 > stop)
{
int y = --b2;
R_Drawers()->DrawFogBoundaryLine(y, xr, spanend[y]);
}
}
else
{
t2 = MAX(t2, MIN(t1, b2));
b2 = MIN(b2, MAX(b1, t2));
}
stop = MIN(t2, b1);
while (t1 < stop)
{
spanend[t1++] = x;
}
stop = MAX(b2, t2);
while (b1 > stop)
{
spanend[--b1] = x;
}
}
t2 = uclip[x];
b2 = dclip[x];
}
if (t2 < b2 && rcolormap != 0)
{
R_DrawFogBoundarySection(t2, b2, x1);
}
}
//==========================================================================