void genpic(int p){ //根据密度数据生成位图
int i,j;
printf("Generating pic...\n");
max=B*total/(p+1)*8/DIM/DIM; //颜色255对应的根密度
for(j=0;j<DIM;j++)
for(i=0;i<DIM;i++)
colorfunc(den[i][j],bitmap[j][i]);
}
static forceinline void R_DrawColumnGeneric(PIXEL_T* dest, const drawcolumn_t& drawcolumn)
{
#ifdef RANGECHECK
if (drawcolumn.x < 0 || drawcolumn.x >= viewwidth || drawcolumn.yl < 0 || drawcolumn.yh >= viewheight)
{
Printf (PRINT_HIGH, "R_DrawColumn: %i to %i at %i\n", drawcolumn.yl, drawcolumn.yh, drawcolumn.x);
return;
}
#endif
palindex_t* source = drawcolumn.source;
int pitch = drawcolumn.pitch_in_pixels;
int count = drawcolumn.yh - drawcolumn.yl + 1;
if (count <= 0)
return;
const fixed_t fracstep = drawcolumn.iscale;
fixed_t frac = drawcolumn.texturefrac;
const int texheight = drawcolumn.textureheight;
const int mask = (texheight >> FRACBITS) - 1;
COLORFUNC colorfunc(drawcolumn);
// [SL] Properly tile textures whose heights are not a power-of-2,
// avoiding a tutti-frutti effect. From Eternity Engine.
if (texheight & (texheight - 1))
{
// texture height is NOT a power-of-2
// just do a simple blit to the dest buffer (I'm lazy)
if (frac < 0)
while ((frac += texheight) < 0);
else
while (frac >= texheight)
frac -= texheight;
while (count--)
{
colorfunc(source[frac >> FRACBITS], dest);
dest += pitch;
if ((frac += fracstep) >= texheight)
frac -= texheight;
}
}
else
{
// texture height is a power-of-2
// do some loop unrolling
while (count >= 8)
static forceinline void R_FillColumnGeneric(PIXEL_T* dest, const drawcolumn_t& drawcolumn)
{
#ifdef RANGECHECK
if (drawcolumn.x < 0 || drawcolumn.x >= viewwidth || drawcolumn.yl < 0 || drawcolumn.yh >= viewheight)
{
Printf (PRINT_HIGH, "R_FillColumn: %i to %i at %i\n", drawcolumn.yl, drawcolumn.yh, drawcolumn.x);
return;
}
#endif
int color = drawcolumn.color;
int pitch = drawcolumn.pitch_in_pixels;
int count = drawcolumn.yh - drawcolumn.yl + 1;
if (count <= 0)
return;
COLORFUNC colorfunc(drawcolumn);
do {
colorfunc(color, dest);
dest += pitch;
} while (--count);
}
