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Simplify CalcTiltedLighting in hope that this function is what made GCC break

This commit is contained in:
Magnus Norddahl 2017-02-23 23:53:38 +01:00
parent b4b391c51e
commit 8bd0df1ace
1 changed files with 14 additions and 84 deletions
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98
src/swrenderer/drawers/r_draw_pal.cpp
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@ -2818,100 +2818,30 @@ namespace swrenderer
// Calculates the lighting for one row of a tilted plane. If the definition
// of GETPALOOKUP changes, this needs to change, too.
void DrawTiltedSpanPalCommand::CalcTiltedLighting(double lval, double lend, int width, DrawerThread *thread)
void DrawTiltedSpanPalCommand::CalcTiltedLighting(double lstart, double lend, int width, DrawerThread *thread)
{
const uint8_t **tiltlighting = thread->tiltlighting;
double lstep;
uint8_t *lightfiller = nullptr;
int i = 0;
uint8_t *lightstart = basecolormapdata + (GETPALOOKUP(lstart, planeshade) << COLORMAPSHIFT);
uint8_t *lightend = basecolormapdata + (GETPALOOKUP(lend, planeshade) << COLORMAPSHIFT);
if (width == 0 || lval == lend)
{ // Constant lighting
lightfiller = basecolormapdata + (GETPALOOKUP(lval, planeshade) << COLORMAPSHIFT);
if (width == 0 || lightstart == lightend)
{
for (int i = 0; i <= width; i++)
{
tiltlighting[i] = lightstart;
}
}
else
{
lstep = (lend - lval) / width;
if (lval >= MAXLIGHTVIS)
{ // lval starts "too bright".
lightfiller = basecolormapdata + (GETPALOOKUP(lval, planeshade) << COLORMAPSHIFT);
for (; i <= width && lval >= MAXLIGHTVIS; ++i)
{
tiltlighting[i] = lightfiller;
lval += lstep;
}
}
if (lend >= MAXLIGHTVIS)
{ // lend ends "too bright".
lightfiller = basecolormapdata + (GETPALOOKUP(lend, planeshade) << COLORMAPSHIFT);
for (; width > i && lend >= MAXLIGHTVIS; --width)
{
tiltlighting[width] = lightfiller;
lend -= lstep;
}
}
if (width > 0)
double lstep = (lend - lstart) / width;
double lval = lstart;
for (int i = 0; i <= width; i++)
{
lval = FIXED2DBL(planeshade) - lval;
lend = FIXED2DBL(planeshade) - lend;
lstep = (lend - lval) / width;
if (lstep < 0)
{ // Going from dark to light
if (lval < 1.)
{ // All bright
lightfiller = basecolormapdata;
}
else
{
if (lval >= NUMCOLORMAPS)
{ // Starts beyond the dark end
uint8_t *clight = basecolormapdata + ((NUMCOLORMAPS - 1) << COLORMAPSHIFT);
while (lval >= NUMCOLORMAPS && i <= width)
{
tiltlighting[i++] = clight;
lval += lstep;
}
if (i > width)
return;
}
while (i <= width && lval >= 0)
{
tiltlighting[i++] = basecolormapdata + (xs_ToInt(lval) << COLORMAPSHIFT);
lval += lstep;
}
lightfiller = basecolormapdata;
}
}
else
{ // Going from light to dark
if (lval >= (NUMCOLORMAPS - 1))
{ // All dark
lightfiller = basecolormapdata + ((NUMCOLORMAPS - 1) << COLORMAPSHIFT);
}
else
{
while (lval < 0 && i <= width)
{
tiltlighting[i++] = basecolormapdata;
lval += lstep;
}
if (i > width)
return;
while (i <= width && lval < (NUMCOLORMAPS - 1))
{
tiltlighting[i++] = basecolormapdata + (xs_ToInt(lval) << COLORMAPSHIFT);
lval += lstep;
}
lightfiller = basecolormapdata + ((NUMCOLORMAPS - 1) << COLORMAPSHIFT);
}
}
tiltlighting[i] = basecolormapdata + (GETPALOOKUP(lval, planeshade) << COLORMAPSHIFT);
lval += lstep;
}
}
for (; i <= width; i++)
{
tiltlighting[i] = lightfiller;
}
}
/////////////////////////////////////////////////////////////////////////