// -------------------------------------------------------------------------------------
// Texture map current scanline.
// Uses globals Du_dx and Dv_dx to incrementally compute u,v coordinates
// -------------------------------------------------------------------------------------
void tmap_scanline_flat(int y, fix xleft, fix xright)
{
if (xright < xleft)
return;
// setup to call assembler scanline renderer
fx_y = y;
fx_xleft = f2i(xleft);
fx_xright = f2i(xright);
if ( Gr_scanline_darkening_level >= GR_FADE_LEVELS )
cur_tmap_scanline_flat();
else {
tmap_flat_shade_value = Gr_scanline_darkening_level;
cur_tmap_scanline_shaded();
}
}
// -------------------------------------------------------------------------------------
// Texture map current scanline.
// Uses globals Du_dx and Dv_dx to incrementally compute u,v coordinates
// -------------------------------------------------------------------------------------
void tmap_scanline_flat(int y, fix xleft, fix xright)
{
if (xright < xleft)
return;
// setup to call assembler scanline renderer
fx_y = y;
fx_xleft = xleft/F1_0; // (xleft >> 16) != xleft/F1_0 for negative numbers, f2i caused random crashes
fx_xright = xright/F1_0;
if ( grd_curcanv->cv_fade_level >= GR_FADE_OFF )
cur_tmap_scanline_flat();
else {
tmap_flat_shade_value = grd_curcanv->cv_fade_level;
cur_tmap_scanline_shaded();
}
}
// -------------------------------------------------------------------------------------
// Texture map current scanline.
// Uses globals Du_dx and Dv_dx to incrementally compute u,v coordinates
// -------------------------------------------------------------------------------------
void tmap_scanline_flat(int y, fix xleft, fix xright)
{
if (xright < xleft)
return;
// setup to call assembler scanline renderer
fx_y = y;
fx_xleft = f2i(xleft);
fx_xright = f2i(xright);
if ( gameStates.render.grAlpha >= GR_ACTUAL_FADE_LEVELS )
cur_tmap_scanline_flat();
else {
tmap_flat_shadeValue = gameStates.render.grAlpha;
cur_tmap_scanline_shaded();
}
}
// -------------------------------------------------------------------------------------
// Texture map current scanline using linear interpolation.
// -------------------------------------------------------------------------------------
void ntmap_scanline_lighted_linear(grs_bitmap *srcb, int y, fix xleft, fix xright, fix uleft, fix uright, fix vleft, fix vright, fix lleft, fix lright)
{
fix dx,recip_dx,du_dx,dv_dx,dl_dx;
dx = f2i(xright) - f2i(xleft);
if ((dx < 0) || (xright < 0) || (xleft > xright)) // the (xleft > xright) term is not redundant with (dx < 0) because dx is computed using integers
return;
// setup to call assembler scanline renderer
if (dx < FIX_RECIP_TABLE_SIZE)
recip_dx = fix_recip[dx];
else
recip_dx = F1_0/dx;
du_dx = fixmul(uright - uleft,recip_dx);
dv_dx = fixmul(vright - vleft,recip_dx);
fx_u = uleft;
fx_v = vleft;
fx_du_dx = du_dx;
fx_dv_dx = dv_dx;
fx_y = y;
fx_xright = f2i(xright);
fx_xleft = f2i(xleft);
pixptr = srcb->bm_data;
switch (Lighting_enabled) {
case 0:
//added 07/11/99 adb - prevent writing before the buffer
if (fx_xleft < 0)
fx_xleft = 0;
//end addition -adb
cur_tmap_scanline_lin_nolight();
break;
case 1:
if (lleft < F1_0/2)
lleft = F1_0/2;
if (lright < F1_0/2)
lright = F1_0/2;
if (lleft > MAX_LIGHTING_VALUE*NUM_LIGHTING_LEVELS)
lleft = MAX_LIGHTING_VALUE*NUM_LIGHTING_LEVELS;
if (lright > MAX_LIGHTING_VALUE*NUM_LIGHTING_LEVELS)
lright = MAX_LIGHTING_VALUE*NUM_LIGHTING_LEVELS;
//added 07/11/99 adb - prevent writing before the buffer
if (fx_xleft < 0)
fx_xleft = 0;
//end addition -adb
{
fix mul_thing;
fx_l = lleft;
fx_dl_dx = fixmul(lright - lleft,recip_dx);
// This is a pretty ugly hack to prevent lighting overflows.
mul_thing = dx * fx_dl_dx;
if (lleft + mul_thing < 0)
fx_dl_dx += 12;
else if (lleft + mul_thing > (NUM_LIGHTING_LEVELS*F1_0-F1_0/2))
fx_dl_dx -= 12;
}
fx_l = lleft;
dl_dx = fixmul(lright - lleft,recip_dx);
fx_dl_dx = dl_dx;
cur_tmap_scanline_lin();
break;
case 2:
#ifdef EDITOR_TMAP
fx_xright = f2i(xright);
fx_xleft = f2i(xleft);
tmap_flat_color = 1;
cur_tmap_scanline_flat();
#else
Int3(); // Illegal, called an editor only routine!
#endif
break;
}
}
// -------------------------------------------------------------------------------------
// Texture map current scanline in perspective.
// -------------------------------------------------------------------------------------
void ntmap_scanline_lighted(grs_bitmap *srcb, int y, fix xleft, fix xright, fix uleft, fix uright, fix vleft, fix vright, fix zleft, fix zright, fix lleft, fix lright)
{
fix dx,recip_dx;
fx_xright = f2i(xright);
//edited 06/27/99 Matt Mueller - moved these tests up from within the switch so as not to do a bunch of needless calculations when we are just gonna return anyway. Slight fps boost?
if (fx_xright < Window_clip_left)
return;
fx_xleft = f2i(xleft);
if (fx_xleft > Window_clip_right)
return;
//end edit -MM
dx = fx_xright - fx_xleft;
if ((dx < 0) || (xright < 0) || (xleft > xright)) // the (xleft > xright) term is not redundant with (dx < 0) because dx is computed using integers
return;
// setup to call assembler scanline renderer
if (dx < FIX_RECIP_TABLE_SIZE)
recip_dx = fix_recip[dx];
else
recip_dx = F1_0/dx;
fx_u = uleft;
fx_v = vleft;
fx_z = zleft;
fx_du_dx = fixmul(uright - uleft,recip_dx);
fx_dv_dx = fixmul(vright - vleft,recip_dx);
fx_dz_dx = fixmul(zright - zleft,recip_dx);
fx_y = y;
pixptr = srcb->bm_data;
switch (Lighting_enabled) {
case 0:
//added 05/17/99 Matt Mueller - prevent writing before the buffer
if ((fx_y == 0) && (fx_xleft < 0))
fx_xleft = 0;
//end addition -MM
if (fx_xright > Window_clip_right)
fx_xright = Window_clip_right;
cur_tmap_scanline_per();
break;
case 1: {
fix mul_thing;
if (lleft < 0) lleft = 0;
if (lright < 0) lright = 0;
if (lleft > (NUM_LIGHTING_LEVELS*F1_0-F1_0/2)) lleft = (NUM_LIGHTING_LEVELS*F1_0-F1_0/2);
if (lright > (NUM_LIGHTING_LEVELS*F1_0-F1_0/2)) lright = (NUM_LIGHTING_LEVELS*F1_0-F1_0/2);
fx_l = lleft;
fx_dl_dx = fixmul(lright - lleft,recip_dx);
// This is a pretty ugly hack to prevent lighting overflows.
mul_thing = dx * fx_dl_dx;
if (lleft + mul_thing < 0)
fx_dl_dx += 12;
else if (lleft + mul_thing > (NUM_LIGHTING_LEVELS*F1_0-F1_0/2))
fx_dl_dx -= 12;
//added 05/17/99 Matt Mueller - prevent writing before the buffer
if ((fx_y == 0) && (fx_xleft < 0))
fx_xleft = 0;
//end addition -MM
if (fx_xright > Window_clip_right)
fx_xright = Window_clip_right;
cur_tmap_scanline_per();
break;
}
case 2:
#ifdef EDITOR_TMAP
fx_xright = f2i(xright);
fx_xleft = f2i(xleft);
tmap_flat_color = 1;
cur_tmap_scanline_flat();
#else
Int3(); // Illegal, called an editor only routine!
#endif
break;
}
}
