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vkdoom_m/src/swrenderer/scene/r_things.cpp
Magnus Norddahl 50c525161b Move wallsprite handling to r_wallsprite
2016-12-30 08:11:06 +01:00

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// Emacs style mode select -*- C++ -*-
//-----------------------------------------------------------------------------
//
// $Id:$
//
// Copyright (C) 1993-1996 by id Software, Inc.
//
// This source is available for distribution and/or modification
// only under the terms of the DOOM Source Code License as
// published by id Software. All rights reserved.
//
// The source is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// FITNESS FOR A PARTICULAR PURPOSE. See the DOOM Source Code License
// for more details.
//
// $Log:$
//
// DESCRIPTION:
// Refresh of things, i.e. objects represented by sprites.
//
// This file contains some code from the Build Engine.
//
// "Build Engine & Tools" Copyright (c) 1993-1997 Ken Silverman
// Ken Silverman's official web site: "http://www.advsys.net/ken"
// See the included license file "BUILDLIC.TXT" for license info.
//
//-----------------------------------------------------------------------------
#include <stdio.h>
#include <stdlib.h>
#include <algorithm>
#include "p_lnspec.h"
#include "templates.h"
#include "doomdef.h"
#include "m_swap.h"
#include "i_system.h"
#include "w_wad.h"
#include "swrenderer/r_main.h"
#include "swrenderer/scene/r_things.h"
#include "c_console.h"
#include "c_cvars.h"
#include "c_dispatch.h"
#include "doomstat.h"
#include "v_video.h"
#include "sc_man.h"
#include "s_sound.h"
#include "sbar.h"
#include "gi.h"
#include "r_sky.h"
#include "cmdlib.h"
#include "g_level.h"
#include "d_net.h"
#include "colormatcher.h"
#include "d_netinf.h"
#include "p_effect.h"
#include "r_bsp.h"
#include "r_plane.h"
#include "r_segs.h"
#include "r_3dfloors.h"
#include "swrenderer/drawers/r_draw_rgba.h"
#include "swrenderer/drawers/r_draw_pal.h"
#include "v_palette.h"
#include "r_data/r_translate.h"
#include "r_data/colormaps.h"
#include "r_data/voxels.h"
#include "p_local.h"
#include "p_maputl.h"
#include "r_voxel.h"
#include "r_draw_segment.h"
#include "r_portal.h"
#include "r_particle.h"
#include "r_playersprite.h"
#include "r_wallsprite.h"
#include "swrenderer/r_memory.h"
EXTERN_CVAR(Int, r_drawfuzz)
EXTERN_CVAR(Bool, r_drawvoxels)
EXTERN_CVAR(Bool, r_blendmethod)
CVAR(Bool, r_fullbrightignoresectorcolor, true, CVAR_ARCHIVE | CVAR_GLOBALCONFIG);
CVAR(Bool, r_splitsprites, true, CVAR_ARCHIVE)
namespace swrenderer
{
using namespace drawerargs;
// [RH] A c-buffer. Used for keeping track of offscreen voxel spans.
struct FCoverageBuffer
{
struct Span
{
Span *NextSpan;
short Start, Stop;
};
FCoverageBuffer(int size);
~FCoverageBuffer();
void Clear();
void InsertSpan(int listnum, int start, int stop);
Span *AllocSpan();
FMemArena SpanArena;
Span **Spans; // [0..NumLists-1] span lists
Span *FreeSpans;
unsigned int NumLists;
};
extern double globaluclip, globaldclip;
//
// Sprite rotation 0 is facing the viewer,
// rotation 1 is one angle turn CLOCKWISE around the axis.
// This is not the same as the angle,
// which increases counter clockwise (protractor).
//
double pspritexscale;
double pspritexiscale;
double pspriteyscale;
fixed_t sky1scale; // [RH] Sky 1 scale factor
fixed_t sky2scale; // [RH] Sky 2 scale factor
int spriteshade;
FTexture *WallSpriteTile;
// constant arrays
// used for psprite clipping and initializing clipping
short zeroarray[MAXWIDTH];
short screenheightarray[MAXWIDTH];
//
// INITIALIZATION FUNCTIONS
//
int OffscreenBufferWidth, OffscreenBufferHeight;
BYTE *OffscreenColorBuffer;
FCoverageBuffer *OffscreenCoverageBuffer;
//
// GAME FUNCTIONS
//
bool DrewAVoxel;
static vissprite_t **spritesorter;
static int spritesortersize = 0;
static int vsprcount;
void R_DeinitSprites()
{
R_DeinitVisSprites();
// Free vissprites sorter
if (spritesorter != NULL)
{
delete[] spritesorter;
spritesortersize = 0;
spritesorter = NULL;
}
// Free offscreen buffer
if (OffscreenColorBuffer != NULL)
{
delete[] OffscreenColorBuffer;
OffscreenColorBuffer = NULL;
}
if (OffscreenCoverageBuffer != NULL)
{
delete OffscreenCoverageBuffer;
OffscreenCoverageBuffer = NULL;
}
OffscreenBufferHeight = OffscreenBufferWidth = 0;
}
//
// R_ClearSprites
// Called at frame start.
//
void R_ClearSprites (void)
{
R_ClearVisSprites();
DrewAVoxel = false;
}
//
// R_DrawMaskedColumn
// Used for sprites and masked mid textures.
// Masked means: partly transparent, i.e. stored
// in posts/runs of opaque pixels.
//
short* mfloorclip;
short* mceilingclip;
double spryscale;
double sprtopscreen;
bool sprflipvert;
void R_DrawMaskedColumnBgra(FTexture *tex, fixed_t col, bool unmasked)
{
fixed_t saved_iscale = dc_iscale; // Save this because we need to modify it for mipmaps
// Normalize to 0-1 range:
double uv_stepd = FIXED2DBL(dc_iscale);
double v_step = uv_stepd / tex->GetHeight();
// Convert to uint32:
dc_iscale = (uint32_t)(v_step * (1 << 30));
// Texture mipmap and filter selection:
fixed_t xoffset = col;
double xmagnitude = 1.0; // To do: pass this into R_DrawMaskedColumn
double ymagnitude = fabs(uv_stepd);
double magnitude = MAX(ymagnitude, xmagnitude);
double min_lod = -1000.0;
double lod = MAX(log2(magnitude) + r_lod_bias, min_lod);
bool magnifying = lod < 0.0f;
int mipmap_offset = 0;
int mip_width = tex->GetWidth();
int mip_height = tex->GetHeight();
uint32_t xpos = (uint32_t)((((uint64_t)xoffset) << FRACBITS) / mip_width);
if (r_mipmap && tex->Mipmapped() && mip_width > 1 && mip_height > 1)
{
int level = (int)lod;
while (level > 0 && mip_width > 1 && mip_height > 1)
{
mipmap_offset += mip_width * mip_height;
level--;
mip_width = MAX(mip_width >> 1, 1);
mip_height = MAX(mip_height >> 1, 1);
}
}
xoffset = (xpos >> FRACBITS) * mip_width;
const uint32_t *pixels = tex->GetPixelsBgra() + mipmap_offset;
bool filter_nearest = (magnifying && !r_magfilter) || (!magnifying && !r_minfilter);
if (filter_nearest)
{
xoffset = MAX(MIN(xoffset, (mip_width << FRACBITS) - 1), 0);
int tx = xoffset >> FRACBITS;
dc_source = (BYTE*)(pixels + tx * mip_height);
dc_source2 = nullptr;
dc_textureheight = mip_height;
dc_texturefracx = 0;
}
else
{
xoffset = MAX(MIN(xoffset - (FRACUNIT / 2), (mip_width << FRACBITS) - 1), 0);
int tx0 = xoffset >> FRACBITS;
int tx1 = MIN(tx0 + 1, mip_width - 1);
dc_source = (BYTE*)(pixels + tx0 * mip_height);
dc_source2 = (BYTE*)(pixels + tx1 * mip_height);
dc_textureheight = mip_height;
dc_texturefracx = (xoffset >> (FRACBITS - 4)) & 15;
}
// Grab the posts we need to draw
const FTexture::Span *span;
tex->GetColumnBgra(col >> FRACBITS, &span);
FTexture::Span unmaskedSpan[2];
if (unmasked)
{
span = unmaskedSpan;
unmaskedSpan[0].TopOffset = 0;
unmaskedSpan[0].Length = tex->GetHeight();
unmaskedSpan[1].TopOffset = 0;
unmaskedSpan[1].Length = 0;
}
// Draw each span post
while (span->Length != 0)
{
const int length = span->Length;
const int top = span->TopOffset;
// calculate unclipped screen coordinates for post
dc_yl = (int)(sprtopscreen + spryscale * top + 0.5);
dc_yh = (int)(sprtopscreen + spryscale * (top + length) + 0.5) - 1;
if (sprflipvert)
{
swapvalues(dc_yl, dc_yh);
}
if (dc_yh >= mfloorclip[dc_x])
{
dc_yh = mfloorclip[dc_x] - 1;
}
if (dc_yl < mceilingclip[dc_x])
{
dc_yl = mceilingclip[dc_x];
}
if (dc_yl <= dc_yh)
{
dc_dest = (ylookup[dc_yl] + dc_x) * 4 + dc_destorg;
dc_count = dc_yh - dc_yl + 1;
double v = ((dc_yl + 0.5 - sprtopscreen) / spryscale) / tex->GetHeight();
dc_texturefrac = (uint32_t)(v * (1 << 30));
(R_Drawers()->*colfunc)();
}
span++;
}
dc_iscale = saved_iscale;
}
void R_DrawMaskedColumn (FTexture *tex, fixed_t col, bool unmasked)
{
// Handle the linear filtered version in a different function to reduce chances of merge conflicts from zdoom.
if (r_swtruecolor && !drawer_needs_pal_input) // To do: add support to R_DrawColumnHoriz_rgba
{
R_DrawMaskedColumnBgra(tex, col, unmasked);
return;
}
const FTexture::Span *span;
const BYTE *column;
if (r_swtruecolor && !drawer_needs_pal_input)
column = (const BYTE *)tex->GetColumnBgra(col >> FRACBITS, &span);
else
column = tex->GetColumn(col >> FRACBITS, &span);
FTexture::Span unmaskedSpan[2];
if (unmasked)
{
span = unmaskedSpan;
unmaskedSpan[0].TopOffset = 0;
unmaskedSpan[0].Length = tex->GetHeight();
unmaskedSpan[1].TopOffset = 0;
unmaskedSpan[1].Length = 0;
}
int pixelsize = r_swtruecolor ? 4 : 1;
while (span->Length != 0)
{
const int length = span->Length;
const int top = span->TopOffset;
// calculate unclipped screen coordinates for post
dc_yl = (int)(sprtopscreen + spryscale * top + 0.5);
dc_yh = (int)(sprtopscreen + spryscale * (top + length) + 0.5) - 1;
if (sprflipvert)
{
swapvalues (dc_yl, dc_yh);
}
if (dc_yh >= mfloorclip[dc_x])
{
dc_yh = mfloorclip[dc_x] - 1;
}
if (dc_yl < mceilingclip[dc_x])
{
dc_yl = mceilingclip[dc_x];
}
if (dc_yl <= dc_yh)
{
dc_texturefrac = FLOAT2FIXED((dc_yl + 0.5 - sprtopscreen) / spryscale);
dc_source = column;
dc_source2 = nullptr;
dc_dest = (ylookup[dc_yl] + dc_x) * pixelsize + dc_destorg;
dc_count = dc_yh - dc_yl + 1;
fixed_t maxfrac = ((top + length) << FRACBITS) - 1;
dc_texturefrac = MAX(dc_texturefrac, 0);
dc_texturefrac = MIN(dc_texturefrac, maxfrac);
if (dc_iscale > 0)
dc_count = MIN(dc_count, (maxfrac - dc_texturefrac + dc_iscale - 1) / dc_iscale);
else if (dc_iscale < 0)
dc_count = MIN(dc_count, (dc_texturefrac - dc_iscale) / (-dc_iscale));
(R_Drawers()->*colfunc)();
}
span++;
}
}
// [ZZ]
// R_ClipSpriteColumnWithPortals
//
static TArray<drawseg_t *> portaldrawsegs;
static inline void R_CollectPortals()
{
// This function collects all drawsegs that may be of interest to R_ClipSpriteColumnWithPortals
// Having that function over the entire list of drawsegs can break down performance quite drastically.
// This is doing the costly stuff only once so that R_ClipSpriteColumnWithPortals can
// a) exit early if no relevant info is found and
// b) skip most of the collected drawsegs which have no portal attached.
portaldrawsegs.Clear();
for (drawseg_t* seg = ds_p; seg-- > firstdrawseg; ) // copied code from killough below
{
// I don't know what makes this happen (some old top-down portal code or possibly skybox code? something adds null lines...)
// crashes at the first frame of the first map of Action2.wad
if (!seg->curline) continue;
line_t* line = seg->curline->linedef;
// ignore minisegs from GL nodes.
if (!line) continue;
// check if this line will clip sprites to itself
if (!line->isVisualPortal() && line->special != Line_Mirror)
continue;
// don't clip sprites with portal's back side (it's transparent)
if (seg->curline->sidedef != line->sidedef[0])
continue;
portaldrawsegs.Push(seg);
}
}
bool R_ClipSpriteColumnWithPortals(vissprite_t* spr)
{
// [ZZ] 10.01.2016: don't clip sprites from the root of a skybox.
if (CurrentPortalInSkybox)
return false;
for (drawseg_t *seg : portaldrawsegs)
{
// ignore segs from other portals
if (seg->CurrentPortalUniq != CurrentPortalUniq)
continue;
// (all checks that are already done in R_CollectPortals have been removed for performance reasons.)
// don't clip if the sprite is in front of the portal
if (!P_PointOnLineSidePrecise(spr->gpos.X, spr->gpos.Y, seg->curline->linedef))
continue;
// now if current column is covered by this drawseg, we clip it away
if ((dc_x >= seg->x1) && (dc_x < seg->x2))
return true;
}
return false;
}
//
// R_DrawVisSprite
// mfloorclip and mceilingclip should also be set.
//
void R_DrawVisSprite (vissprite_t *vis)
{
fixed_t frac;
FTexture *tex;
int x2;
fixed_t xiscale;
bool ispsprite = (!vis->sector && vis->gpos != FVector3(0, 0, 0));
if (vis->xscale == 0 || fabs(vis->yscale) < (1.0f / 32000.0f))
{ // scaled to 0; can't see
return;
}
fixed_t centeryfrac = FLOAT2FIXED(CenterY);
R_SetColorMapLight(vis->Style.BaseColormap, 0, vis->Style.ColormapNum << FRACBITS);
bool visible = R_SetPatchStyle (vis->Style.RenderStyle, vis->Style.Alpha, vis->Translation, vis->FillColor);
if (vis->Style.RenderStyle == LegacyRenderStyles[STYLE_Shaded])
{ // For shaded sprites, R_SetPatchStyle sets a dc_colormap to an alpha table, but
// it is the brightest one. We need to get back to the proper light level for
// this sprite.
R_SetColorMapLight(dc_fcolormap, 0, vis->Style.ColormapNum << FRACBITS);
}
if (visible)
{
tex = vis->pic;
spryscale = vis->yscale;
sprflipvert = false;
dc_iscale = FLOAT2FIXED(1 / vis->yscale);
frac = vis->startfrac;
xiscale = vis->xiscale;
dc_texturemid = vis->texturemid;
if (vis->renderflags & RF_YFLIP)
{
sprflipvert = true;
spryscale = -spryscale;
dc_iscale = -dc_iscale;
dc_texturemid -= vis->pic->GetHeight();
sprtopscreen = CenterY + dc_texturemid * spryscale;
}
else
{
sprflipvert = false;
sprtopscreen = CenterY - dc_texturemid * spryscale;
}
dc_x = vis->x1;
x2 = vis->x2;
if (dc_x < x2)
{
while (dc_x < x2)
{
if (ispsprite || !R_ClipSpriteColumnWithPortals(vis))
R_DrawMaskedColumn (tex, frac, false);
dc_x++;
frac += xiscale;
}
}
}
R_FinishSetPatchStyle ();
NetUpdate ();
}
#if 0
void R_DrawVisVoxel(vissprite_t *spr, int minslabz, int maxslabz, short *cliptop, short *clipbot)
{
int flags = 0;
// Do setup for blending.
R_SetColorMapLight(spr->Style.BaseColormap, 0, spr->Style.ColormapNum << FRACBITS);
bool visible = R_SetPatchStyle(spr->Style.RenderStyle, spr->Style.Alpha, spr->Translation, spr->FillColor);
if (!visible)
{
return;
}
if (colfunc == fuzzcolfunc || colfunc == R_FillColumn)
{
flags = DVF_OFFSCREEN | DVF_SPANSONLY;
}
else if (colfunc != basecolfunc)
{
flags = DVF_OFFSCREEN;
}
if (flags != 0)
{
R_CheckOffscreenBuffer(RenderTarget->GetWidth(), RenderTarget->GetHeight(), !!(flags & DVF_SPANSONLY));
}
if (spr->bInMirror)
{
flags |= DVF_MIRRORED;
}
// Render the voxel, either directly to the screen or offscreen.
R_DrawVoxel(spr->pa.vpos, spr->pa.vang, spr->gpos, spr->Angle,
spr->xscale, FLOAT2FIXED(spr->yscale), spr->voxel, spr->Style.BaseColormap, spr->Style.ColormapNum, cliptop, clipbot,
minslabz, maxslabz, flags);
// Blend the voxel, if that's what we need to do.
if ((flags & ~DVF_MIRRORED) != 0)
{
int pixelsize = r_swtruecolor ? 4 : 1;
for (int x = 0; x < viewwidth; ++x)
{
if (!(flags & DVF_SPANSONLY) && (x & 3) == 0)
{
rt_initcols(OffscreenColorBuffer + x * OffscreenBufferHeight);
}
for (FCoverageBuffer::Span *span = OffscreenCoverageBuffer->Spans[x]; span != NULL; span = span->NextSpan)
{
if (flags & DVF_SPANSONLY)
{
dc_x = x;
dc_yl = span->Start;
dc_yh = span->Stop - 1;
dc_count = span->Stop - span->Start;
dc_dest = (ylookup[span->Start] + x) * pixelsize + dc_destorg;
colfunc();
}
else
{
rt_span_coverage(x, span->Start, span->Stop - 1);
}
}
if (!(flags & DVF_SPANSONLY) && (x & 3) == 3)
{
rt_draw4cols(x - 3);
}
}
}
R_FinishSetPatchStyle();
NetUpdate();
}
#endif
//
// R_ProjectSprite
// Generates a vissprite for a thing if it might be visible.
//
void R_ProjectSprite (AActor *thing, int fakeside, F3DFloor *fakefloor, F3DFloor *fakeceiling, sector_t *current_sector)
{
double tr_x;
double tr_y;
double gzt; // killough 3/27/98
double gzb; // [RH] use bottom of sprite, not actor
double tx;// , tx2;
double tz;
double xscale = 1, yscale = 1;
int x1;
int x2;
FTextureID picnum;
FTexture *tex;
FVoxelDef *voxel;
vissprite_t* vis;
fixed_t iscale;
sector_t* heightsec; // killough 3/27/98
// Don't waste time projecting sprites that are definitely not visible.
if (thing == NULL ||
(thing->renderflags & RF_INVISIBLE) ||
!thing->RenderStyle.IsVisible(thing->Alpha) ||
!thing->IsVisibleToPlayer() ||
!thing->IsInsideVisibleAngles())
{
return;
}
// [ZZ] Or less definitely not visible (hue)
// [ZZ] 10.01.2016: don't try to clip stuff inside a skybox against the current portal.
if (!CurrentPortalInSkybox && CurrentPortal && !!P_PointOnLineSidePrecise(thing->Pos(), CurrentPortal->dst))
return;
// [RH] Interpolate the sprite's position to make it look smooth
DVector3 pos = thing->InterpolatedPosition(r_TicFracF);
pos.Z += thing->GetBobOffset(r_TicFracF);
tex = NULL;
voxel = NULL;
int spritenum = thing->sprite;
DVector2 spriteScale = thing->Scale;
int renderflags = thing->renderflags;
if (spriteScale.Y < 0)
{
spriteScale.Y = -spriteScale.Y;
renderflags ^= RF_YFLIP;
}
if (thing->player != NULL)
{
P_CheckPlayerSprite(thing, spritenum, spriteScale);
}
if (thing->picnum.isValid())
{
picnum = thing->picnum;
tex = TexMan(picnum);
if (tex->UseType == FTexture::TEX_Null)
{
return;
}
if (tex->Rotations != 0xFFFF)
{
// choose a different rotation based on player view
spriteframe_t *sprframe = &SpriteFrames[tex->Rotations];
DAngle ang = (pos - ViewPos).Angle();
angle_t rot;
if (sprframe->Texture[0] == sprframe->Texture[1])
{
if (thing->flags7 & MF7_SPRITEANGLE)
rot = (thing->SpriteAngle + 45.0 / 2 * 9).BAMs() >> 28;
else
rot = (ang - (thing->Angles.Yaw + thing->SpriteRotation) + 45.0 / 2 * 9).BAMs() >> 28;
}
else
{
if (thing->flags7 & MF7_SPRITEANGLE)
rot = (thing->SpriteAngle + (45.0 / 2 * 9 - 180.0 / 16)).BAMs() >> 28;
else
rot = (ang - (thing->Angles.Yaw + thing->SpriteRotation) + (45.0 / 2 * 9 - 180.0 / 16)).BAMs() >> 28;
}
picnum = sprframe->Texture[rot];
if (sprframe->Flip & (1 << rot))
{
renderflags ^= RF_XFLIP;
}
tex = TexMan[picnum]; // Do not animate the rotation
}
}
else
{
// decide which texture to use for the sprite
if ((unsigned)spritenum >= sprites.Size ())
{
DPrintf (DMSG_ERROR, "R_ProjectSprite: invalid sprite number %u\n", spritenum);
return;
}
spritedef_t *sprdef = &sprites[spritenum];
if (thing->frame >= sprdef->numframes)
{
// If there are no frames at all for this sprite, don't draw it.
return;
}
else
{
//picnum = SpriteFrames[sprdef->spriteframes + thing->frame].Texture[0];
// choose a different rotation based on player view
spriteframe_t *sprframe = &SpriteFrames[sprdef->spriteframes + thing->frame];
DAngle ang = (pos - ViewPos).Angle();
angle_t rot;
if (sprframe->Texture[0] == sprframe->Texture[1])
{
if (thing->flags7 & MF7_SPRITEANGLE)
rot = (thing->SpriteAngle + 45.0 / 2 * 9).BAMs() >> 28;
else
rot = (ang - (thing->Angles.Yaw + thing->SpriteRotation) + 45.0 / 2 * 9).BAMs() >> 28;
}
else
{
if (thing->flags7 & MF7_SPRITEANGLE)
rot = (thing->SpriteAngle + (45.0 / 2 * 9 - 180.0 / 16)).BAMs() >> 28;
else
rot = (ang - (thing->Angles.Yaw + thing->SpriteRotation) + (45.0 / 2 * 9 - 180.0 / 16)).BAMs() >> 28;
}
picnum = sprframe->Texture[rot];
if (sprframe->Flip & (1 << rot))
{
renderflags ^= RF_XFLIP;
}
tex = TexMan[picnum]; // Do not animate the rotation
if (r_drawvoxels)
{
voxel = sprframe->Voxel;
}
}
}
if (spriteScale.X < 0)
{
spriteScale.X = -spriteScale.X;
renderflags ^= RF_XFLIP;
}
if (voxel == NULL && (tex == NULL || tex->UseType == FTexture::TEX_Null))
{
return;
}
if ((renderflags & RF_SPRITETYPEMASK) == RF_WALLSPRITE)
{
R_ProjectWallSprite(thing, pos, picnum, spriteScale, renderflags);
return;
}
// transform the origin point
tr_x = pos.X - ViewPos.X;
tr_y = pos.Y - ViewPos.Y;
tz = tr_x * ViewTanCos + tr_y * ViewTanSin;
// thing is behind view plane?
if (voxel == NULL && tz < MINZ)
return;
tx = tr_x * ViewSin - tr_y * ViewCos;
// [RH] Flip for mirrors
if (MirrorFlags & RF_XFLIP)
{
tx = -tx;
}
//tx2 = tx >> 4;
// too far off the side?
// if it's a voxel, it can be further off the side
if ((voxel == NULL && (fabs(tx / 64) > fabs(tz))) ||
(voxel != NULL && (fabs(tx / 128) > fabs(tz))))
{
return;
}
if (voxel == NULL)
{
// [RH] Added scaling
int scaled_to = tex->GetScaledTopOffset();
int scaled_bo = scaled_to - tex->GetScaledHeight();
gzt = pos.Z + spriteScale.Y * scaled_to;
gzb = pos.Z + spriteScale.Y * scaled_bo;
}
else
{
xscale = spriteScale.X * voxel->Scale;
yscale = spriteScale.Y * voxel->Scale;
double piv = voxel->Voxel->Mips[0].Pivot.Z;
gzt = pos.Z + yscale * piv - thing->Floorclip;
gzb = pos.Z + yscale * (piv - voxel->Voxel->Mips[0].SizeZ);
if (gzt <= gzb)
return;
}
// killough 3/27/98: exclude things totally separated
// from the viewer, by either water or fake ceilings
// killough 4/11/98: improve sprite clipping for underwater/fake ceilings
heightsec = thing->Sector->GetHeightSec();
if (heightsec != NULL) // only clip things which are in special sectors
{
if (fakeside == FAKED_AboveCeiling)
{
if (gzt < heightsec->ceilingplane.ZatPoint(pos))
return;
}
else if (fakeside == FAKED_BelowFloor)
{
if (gzb >= heightsec->floorplane.ZatPoint(pos))
return;
}
else
{
if (gzt < heightsec->floorplane.ZatPoint(pos))
return;
if (!(heightsec->MoreFlags & SECF_FAKEFLOORONLY) && gzb >= heightsec->ceilingplane.ZatPoint(pos))
return;
}
}
if (voxel == NULL)
{
xscale = CenterX / tz;
// [RH] Reject sprites that are off the top or bottom of the screen
if (globaluclip * tz > ViewPos.Z - gzb || globaldclip * tz < ViewPos.Z - gzt)
{
return;
}
// [RH] Flip for mirrors
renderflags ^= MirrorFlags & RF_XFLIP;
// calculate edges of the shape
const double thingxscalemul = spriteScale.X / tex->Scale.X;
tx -= ((renderflags & RF_XFLIP) ? (tex->GetWidth() - tex->LeftOffset - 1) : tex->LeftOffset) * thingxscalemul;
double dtx1 = tx * xscale;
x1 = centerx + xs_RoundToInt(dtx1);
// off the right side?
if (x1 >= WindowRight)
return;
tx += tex->GetWidth() * thingxscalemul;
x2 = centerx + xs_RoundToInt(tx * xscale);
// off the left side or too small?
if ((x2 < WindowLeft || x2 <= x1))
return;
xscale = spriteScale.X * xscale / tex->Scale.X;
iscale = (fixed_t)(FRACUNIT / xscale); // Round towards zero to avoid wrapping in edge cases
double yscale = spriteScale.Y / tex->Scale.Y;
// store information in a vissprite
vis = R_NewVisSprite();
vis->CurrentPortalUniq = CurrentPortalUniq;
vis->xscale = FLOAT2FIXED(xscale);
vis->yscale = float(InvZtoScale * yscale / tz);
vis->idepth = float(1 / tz);
vis->floorclip = thing->Floorclip / yscale;
vis->texturemid = tex->TopOffset - (ViewPos.Z - pos.Z + thing->Floorclip) / yscale;
vis->x1 = x1 < WindowLeft ? WindowLeft : x1;
vis->x2 = x2 > WindowRight ? WindowRight : x2;
vis->Angle = thing->Angles.Yaw;
if (renderflags & RF_XFLIP)
{
vis->startfrac = (tex->GetWidth() << FRACBITS) - 1;
vis->xiscale = -iscale;
}
else
{
vis->startfrac = 0;
vis->xiscale = iscale;
}
vis->startfrac += (fixed_t)(vis->xiscale * (vis->x1 - centerx + 0.5 - dtx1));
}
else
{
vis = R_NewVisSprite();
vis->CurrentPortalUniq = CurrentPortalUniq;
vis->xscale = FLOAT2FIXED(xscale);
vis->yscale = (float)yscale;
vis->x1 = WindowLeft;
vis->x2 = WindowRight;
vis->idepth = 1 / MINZ;
vis->floorclip = thing->Floorclip;
pos.Z -= thing->Floorclip;
vis->Angle = thing->Angles.Yaw + voxel->AngleOffset;
int voxelspin = (thing->flags & MF_DROPPED) ? voxel->DroppedSpin : voxel->PlacedSpin;
if (voxelspin != 0)
{
DAngle ang = double(I_FPSTime()) * voxelspin / 1000;
vis->Angle -= ang;
}
vis->pa.vpos = { (float)ViewPos.X, (float)ViewPos.Y, (float)ViewPos.Z };
vis->pa.vang = FAngle((float)ViewAngle.Degrees);
}
// killough 3/27/98: save sector for special clipping later
vis->heightsec = heightsec;
vis->sector = thing->Sector;
vis->depth = (float)tz;
vis->gpos = { (float)pos.X, (float)pos.Y, (float)pos.Z };
vis->gzb = (float)gzb; // [RH] use gzb, not thing->z
vis->gzt = (float)gzt; // killough 3/27/98
vis->deltax = float(pos.X - ViewPos.X);
vis->deltay = float(pos.Y - ViewPos.Y);
vis->renderflags = renderflags;
if(thing->flags5 & MF5_BRIGHT)
vis->renderflags |= RF_FULLBRIGHT; // kg3D
vis->Style.RenderStyle = thing->RenderStyle;
vis->FillColor = thing->fillcolor;
vis->Translation = thing->Translation; // [RH] thing translation table
vis->FakeFlatStat = fakeside;
vis->Style.Alpha = float(thing->Alpha);
vis->fakefloor = fakefloor;
vis->fakeceiling = fakeceiling;
vis->Style.ColormapNum = 0;
vis->bInMirror = MirrorFlags & RF_XFLIP;
vis->bSplitSprite = false;
if (voxel != NULL)
{
vis->voxel = voxel->Voxel;
vis->bIsVoxel = true;
vis->bWallSprite = false;
DrewAVoxel = true;
}
else
{
vis->pic = tex;
vis->bIsVoxel = false;
vis->bWallSprite = false;
}
// The software renderer cannot invert the source without inverting the overlay
// too. That means if the source is inverted, we need to do the reverse of what
// the invert overlay flag says to do.
INTBOOL invertcolormap = (vis->Style.RenderStyle.Flags & STYLEF_InvertOverlay);
if (vis->Style.RenderStyle.Flags & STYLEF_InvertSource)
{
invertcolormap = !invertcolormap;
}
FDynamicColormap *mybasecolormap = basecolormap;
if (current_sector->sectornum != thing->Sector->sectornum) // compare sectornums to account for R_FakeFlat copies.
{
// Todo: The actor is from a different sector so we have to retrieve the proper basecolormap for that sector.
}
// Sprites that are added to the scene must fade to black.
if (vis->Style.RenderStyle == LegacyRenderStyles[STYLE_Add] && mybasecolormap->Fade != 0)
{
mybasecolormap = GetSpecialLights(mybasecolormap->Color, 0, mybasecolormap->Desaturate);
}
if (vis->Style.RenderStyle.Flags & STYLEF_FadeToBlack)
{
if (invertcolormap)
{ // Fade to white
mybasecolormap = GetSpecialLights(mybasecolormap->Color, MAKERGB(255,255,255), mybasecolormap->Desaturate);
invertcolormap = false;
}
else
{ // Fade to black
mybasecolormap = GetSpecialLights(mybasecolormap->Color, MAKERGB(0,0,0), mybasecolormap->Desaturate);
}
}
// get light level
if (fixedcolormap != NULL)
{ // fixed map
vis->Style.BaseColormap = fixedcolormap;
vis->Style.ColormapNum = 0;
}
else
{
if (invertcolormap)
{
mybasecolormap = GetSpecialLights(mybasecolormap->Color, mybasecolormap->Fade.InverseColor(), mybasecolormap->Desaturate);
}
if (fixedlightlev >= 0)
{
vis->Style.BaseColormap = mybasecolormap;
vis->Style.ColormapNum = fixedlightlev >> COLORMAPSHIFT;
}
else if (!foggy && ((renderflags & RF_FULLBRIGHT) || (thing->flags5 & MF5_BRIGHT)))
{ // full bright
vis->Style.BaseColormap = (r_fullbrightignoresectorcolor) ? &FullNormalLight : mybasecolormap;
vis->Style.ColormapNum = 0;
}
else
{ // diminished light
vis->Style.ColormapNum = GETPALOOKUP(
r_SpriteVisibility / MAX(tz, MINZ), spriteshade);
vis->Style.BaseColormap = mybasecolormap;
}
}
}
//
// R_AddSprites
// During BSP traversal, this adds sprites by sector.
//
// killough 9/18/98: add lightlevel as parameter, fixing underwater lighting
// [RH] Save which side of heightsec sprite is on here.
void R_AddSprites (sector_t *sec, int lightlevel, int fakeside)
{
F3DFloor *fakeceiling = NULL;
F3DFloor *fakefloor = NULL;
// BSP is traversed by subsector.
// A sector might have been split into several
// subsectors during BSP building.
// Thus we check whether it was already added.
if (sec->touching_renderthings == nullptr || sec->validcount == validcount)
return;
// Well, now it will be done.
sec->validcount = validcount;
spriteshade = LIGHT2SHADE(lightlevel + r_actualextralight);
// Handle all things in sector.
for(auto p = sec->touching_renderthings; p != nullptr; p = p->m_snext)
{
auto thing = p->m_thing;
if (thing->validcount == validcount) continue;
thing->validcount = validcount;
FIntCVar *cvar = thing->GetClass()->distancecheck;
if (cvar != NULL && *cvar >= 0)
{
double dist = (thing->Pos() - ViewPos).LengthSquared();
double check = (double)**cvar;
if (dist >= check * check)
{
continue;
}
}
// find fake level
for(auto rover : thing->Sector->e->XFloor.ffloors)
{
if(!(rover->flags & FF_EXISTS) || !(rover->flags & FF_RENDERPLANES)) continue;
if(!(rover->flags & FF_SOLID) || rover->alpha != 255) continue;
if(!fakefloor)
{
if(!rover->top.plane->isSlope())
{
if(rover->top.plane->ZatPoint(0., 0.) <= thing->Z()) fakefloor = rover;
}
}
if(!rover->bottom.plane->isSlope())
{
if(rover->bottom.plane->ZatPoint(0., 0.) >= thing->Top()) fakeceiling = rover;
}
}
R_ProjectSprite (thing, fakeside, fakefloor, fakeceiling, sec);
fakeceiling = NULL;
fakefloor = NULL;
}
}
//
// R_SortVisSprites
//
// [RH] The old code for this function used a bubble sort, which was far less
// than optimal with large numbers of sprites. I changed it to use the
// stdlib qsort() function instead, and now it is a *lot* faster; the
// more vissprites that need to be sorted, the better the performance
// gain compared to the old function.
//
// Sort vissprites by depth, far to near
// This is the standard version, which does a simple test based on depth.
static bool sv_compare(vissprite_t *a, vissprite_t *b)
{
return a->idepth > b->idepth;
}
// This is an alternate version, for when one or more voxel is in view.
// It does a 2D distance test based on whichever one is furthest from
// the viewpoint.
static bool sv_compare2d(vissprite_t *a, vissprite_t *b)
{
return DVector2(a->deltax, a->deltay).LengthSquared() <
DVector2(b->deltax, b->deltay).LengthSquared();
}
#if 0
static drawseg_t **drawsegsorter;
static int drawsegsortersize = 0;
// Sort vissprites by leftmost column, left to right
static int sv_comparex (const void *arg1, const void *arg2)
{
return (*(vissprite_t **)arg2)->x1 - (*(vissprite_t **)arg1)->x1;
}
// Sort drawsegs by rightmost column, left to right
static int sd_comparex (const void *arg1, const void *arg2)
{
return (*(drawseg_t **)arg2)->x2 - (*(drawseg_t **)arg1)->x2;
}
// Split up vissprites that intersect drawsegs
void R_SplitVisSprites ()
{
size_t start, stop;
size_t numdrawsegs = ds_p - firstdrawseg;
size_t numsprites;
size_t spr, dseg, dseg2;
if (!r_splitsprites)
return;
if (numdrawsegs == 0 || vissprite_p - firstvissprite == 0)
return;
// Sort drawsegs from left to right
if (numdrawsegs > drawsegsortersize)
{
if (drawsegsorter != NULL)
delete[] drawsegsorter;
drawsegsortersize = numdrawsegs * 2;
drawsegsorter = new drawseg_t *[drawsegsortersize];
}
for (dseg = dseg2 = 0; dseg < numdrawsegs; ++dseg)
{
// Drawsegs that don't clip any sprites don't need to be considered.
if (firstdrawseg[dseg].silhouette)
{
drawsegsorter[dseg2++] = &firstdrawseg[dseg];
}
}
numdrawsegs = dseg2;
if (numdrawsegs == 0)
{
return;
}
qsort (drawsegsorter, numdrawsegs, sizeof(drawseg_t *), sd_comparex);
// Now sort vissprites from left to right, and walk them simultaneously
// with the drawsegs, splitting any that intersect.
start = firstvissprite - vissprites;
int p = 0;
do
{
p++;
R_SortVisSprites (sv_comparex, start);
stop = vissprite_p - vissprites;
numsprites = stop - start;
spr = dseg = 0;
do
{
vissprite_t *vis = spritesorter[spr], *vis2;
// Skip drawsegs until we get to one that doesn't end before the sprite
// begins.
while (dseg < numdrawsegs && drawsegsorter[dseg]->x2 <= vis->x1)
{
dseg++;
}
// Now split the sprite against any drawsegs it intersects
for (dseg2 = dseg; dseg2 < numdrawsegs; dseg2++)
{
drawseg_t *ds = drawsegsorter[dseg2];
if (ds->x1 > vis->x2 || ds->x2 < vis->x1)
continue;
if ((vis->idepth < ds->siz1) != (vis->idepth < ds->siz2))
{ // The drawseg is crossed; find the x where the intersection occurs
int cross = Scale (vis->idepth - ds->siz1, ds->sx2 - ds->sx1, ds->siz2 - ds->siz1) + ds->sx1 + 1;
/* if (cross < ds->x1 || cross > ds->x2)
{ // The original seg is crossed, but the drawseg is not
continue;
}
*/ if (cross <= vis->x1 || cross >= vis->x2)
{ // Don't create 0-sized sprites
continue;
}
vis->bSplitSprite = true;
// Create a new vissprite for the right part of the sprite
vis2 = R_NewVisSprite ();
*vis2 = *vis;
vis2->startfrac += vis2->xiscale * (cross - vis2->x1);
vis->x2 = cross-1;
vis2->x1 = cross;
//vis2->alpha /= 2;
//vis2->RenderStyle = STYLE_Add;
if (vis->idepth < ds->siz1)
{ // Left is in back, right is in front
vis->sector = ds->curline->backsector;
vis2->sector = ds->curline->frontsector;
}
else
{ // Right is in front, left is in back
vis->sector = ds->curline->frontsector;
vis2->sector = ds->curline->backsector;
}
}
}
}
while (dseg < numdrawsegs && ++spr < numsprites);
// Repeat for any new sprites that were added.
}
while (start = stop, stop != vissprite_p - vissprites);
}
#endif
#ifdef __GNUC__
static void swap(vissprite_t *&a, vissprite_t *&b)
{
vissprite_t *t = a;
a = b;
b = t;
}
#endif
void R_SortVisSprites (bool (*compare)(vissprite_t *, vissprite_t *), size_t first)
{
int i;
vissprite_t **spr;
vsprcount = int(vissprite_p - &vissprites[first]);
if (vsprcount == 0)
return;
if (spritesortersize < MaxVisSprites)
{
if (spritesorter != NULL)
delete[] spritesorter;
spritesorter = new vissprite_t *[MaxVisSprites];
spritesortersize = MaxVisSprites;
}
if (!(i_compatflags & COMPATF_SPRITESORT))
{
for (i = 0, spr = firstvissprite; i < vsprcount; i++, spr++)
{
spritesorter[i] = *spr;
}
}
else
{
// If the compatibility option is on sprites of equal distance need to
// be sorted in inverse order. This is most easily achieved by
// filling the sort array backwards before the sort.
for (i = 0, spr = firstvissprite + vsprcount-1; i < vsprcount; i++, spr--)
{
spritesorter[i] = *spr;
}
}
std::stable_sort(&spritesorter[0], &spritesorter[vsprcount], compare);
}
//
// R_DrawSprite
//
void R_DrawSprite (vissprite_t *spr)
{
static short clipbot[MAXWIDTH];
static short cliptop[MAXWIDTH];
drawseg_t *ds;
int i;
int x1, x2;
int r1, r2;
short topclip, botclip;
short *clip1, *clip2;
FSWColormap *colormap = spr->Style.BaseColormap;
int colormapnum = spr->Style.ColormapNum;
F3DFloor *rover;
FDynamicColormap *mybasecolormap;
// [RH] Check for particles
if (!spr->bIsVoxel && spr->pic == NULL)
{
// kg3D - reject invisible parts
if ((fake3D & FAKE3D_CLIPBOTTOM) && spr->gpos.Z <= sclipBottom) return;
if ((fake3D & FAKE3D_CLIPTOP) && spr->gpos.Z >= sclipTop) return;
R_DrawParticle (spr);
return;
}
x1 = spr->x1;
x2 = spr->x2;
// [RH] Quickly reject sprites with bad x ranges.
if (x1 >= x2)
return;
// [RH] Sprites split behind a one-sided line can also be discarded.
if (spr->sector == NULL)
return;
// kg3D - reject invisible parts
if ((fake3D & FAKE3D_CLIPBOTTOM) && spr->gzt <= sclipBottom) return;
if ((fake3D & FAKE3D_CLIPTOP) && spr->gzb >= sclipTop) return;
// kg3D - correct colors now
if (!fixedcolormap && fixedlightlev < 0 && spr->sector->e && spr->sector->e->XFloor.lightlist.Size())
{
if (!(fake3D & FAKE3D_CLIPTOP))
{
sclipTop = spr->sector->ceilingplane.ZatPoint(ViewPos);
}
sector_t *sec = NULL;
for (i = spr->sector->e->XFloor.lightlist.Size() - 1; i >= 0; i--)
{
if (sclipTop <= spr->sector->e->XFloor.lightlist[i].plane.Zat0())
{
rover = spr->sector->e->XFloor.lightlist[i].caster;
if (rover)
{
if (rover->flags & FF_DOUBLESHADOW && sclipTop <= rover->bottom.plane->Zat0())
{
break;
}
sec = rover->model;
if (rover->flags & FF_FADEWALLS)
{
mybasecolormap = sec->ColorMap;
}
else
{
mybasecolormap = spr->sector->e->XFloor.lightlist[i].extra_colormap;
}
}
break;
}
}
// found new values, recalculate
if (sec)
{
INTBOOL invertcolormap = (spr->Style.RenderStyle.Flags & STYLEF_InvertOverlay);
if (spr->Style.RenderStyle.Flags & STYLEF_InvertSource)
{
invertcolormap = !invertcolormap;
}
// Sprites that are added to the scene must fade to black.
if (spr->Style.RenderStyle == LegacyRenderStyles[STYLE_Add] && mybasecolormap->Fade != 0)
{
mybasecolormap = GetSpecialLights(mybasecolormap->Color, 0, mybasecolormap->Desaturate);
}
if (spr->Style.RenderStyle.Flags & STYLEF_FadeToBlack)
{
if (invertcolormap)
{ // Fade to white
mybasecolormap = GetSpecialLights(mybasecolormap->Color, MAKERGB(255,255,255), mybasecolormap->Desaturate);
invertcolormap = false;
}
else
{ // Fade to black
mybasecolormap = GetSpecialLights(mybasecolormap->Color, MAKERGB(0,0,0), mybasecolormap->Desaturate);
}
}
// get light level
if (invertcolormap)
{
mybasecolormap = GetSpecialLights(mybasecolormap->Color, mybasecolormap->Fade.InverseColor(), mybasecolormap->Desaturate);
}
if (fixedlightlev >= 0)
{
spr->Style.BaseColormap = mybasecolormap;
spr->Style.ColormapNum = fixedlightlev >> COLORMAPSHIFT;
}
else if (!foggy && (spr->renderflags & RF_FULLBRIGHT))
{ // full bright
spr->Style.BaseColormap = (r_fullbrightignoresectorcolor) ? &FullNormalLight : mybasecolormap;
spr->Style.ColormapNum = 0;
}
else
{ // diminished light
spriteshade = LIGHT2SHADE(sec->lightlevel + r_actualextralight);
spr->Style.BaseColormap = mybasecolormap;
spr->Style.ColormapNum = GETPALOOKUP(r_SpriteVisibility / MAX(MINZ, (double)spr->depth), spriteshade);
}
}
}
// [RH] Initialize the clipping arrays to their largest possible range
// instead of using a special "not clipped" value. This eliminates
// visual anomalies when looking down and should be faster, too.
topclip = 0;
botclip = viewheight;
// killough 3/27/98:
// Clip the sprite against deep water and/or fake ceilings.
// [RH] rewrote this to be based on which part of the sector is really visible
double scale = InvZtoScale * spr->idepth;
double hzb = DBL_MIN, hzt = DBL_MAX;
if (spr->bIsVoxel && spr->floorclip != 0)
{
hzb = spr->gzb;
}
if (spr->heightsec && !(spr->heightsec->MoreFlags & SECF_IGNOREHEIGHTSEC))
{ // only things in specially marked sectors
if (spr->FakeFlatStat != FAKED_AboveCeiling)
{
double hz = spr->heightsec->floorplane.ZatPoint(spr->gpos);
int h = xs_RoundToInt(CenterY - (hz - ViewPos.Z) * scale);
if (spr->FakeFlatStat == FAKED_BelowFloor)
{ // seen below floor: clip top
if (!spr->bIsVoxel && h > topclip)
{
topclip = short(MIN(h, viewheight));
}
hzt = MIN(hzt, hz);
}
else
{ // seen in the middle: clip bottom
if (!spr->bIsVoxel && h < botclip)
{
botclip = MAX<short> (0, h);
}
hzb = MAX(hzb, hz);
}
}
if (spr->FakeFlatStat != FAKED_BelowFloor && !(spr->heightsec->MoreFlags & SECF_FAKEFLOORONLY))
{
double hz = spr->heightsec->ceilingplane.ZatPoint(spr->gpos);
int h = xs_RoundToInt(CenterY - (hz - ViewPos.Z) * scale);
if (spr->FakeFlatStat == FAKED_AboveCeiling)
{ // seen above ceiling: clip bottom
if (!spr->bIsVoxel && h < botclip)
{
botclip = MAX<short> (0, h);
}
hzb = MAX(hzb, hz);
}
else
{ // seen in the middle: clip top
if (!spr->bIsVoxel && h > topclip)
{
topclip = MIN(h, viewheight);
}
hzt = MIN(hzt, hz);
}
}
}
// killough 3/27/98: end special clipping for deep water / fake ceilings
else if (!spr->bIsVoxel && spr->floorclip)
{ // [RH] Move floorclip stuff from R_DrawVisSprite to here
//int clip = ((FLOAT2FIXED(CenterY) - FixedMul (spr->texturemid - (spr->pic->GetHeight() << FRACBITS) + spr->floorclip, spr->yscale)) >> FRACBITS);
int clip = xs_RoundToInt(CenterY - (spr->texturemid - spr->pic->GetHeight() + spr->floorclip) * spr->yscale);
if (clip < botclip)
{
botclip = MAX<short>(0, clip);
}
}
if (fake3D & FAKE3D_CLIPBOTTOM)
{
if (!spr->bIsVoxel)
{
double hz = sclipBottom;
if (spr->fakefloor)
{
double floorz = spr->fakefloor->top.plane->Zat0();
if (ViewPos.Z > floorz && floorz == sclipBottom )
{
hz = spr->fakefloor->bottom.plane->Zat0();
}
}
int h = xs_RoundToInt(CenterY - (hz - ViewPos.Z) * scale);
if (h < botclip)
{
botclip = MAX<short>(0, h);
}
}
hzb = MAX(hzb, sclipBottom);
}
if (fake3D & FAKE3D_CLIPTOP)
{
if (!spr->bIsVoxel)
{
double hz = sclipTop;
if (spr->fakeceiling != NULL)
{
double ceilingZ = spr->fakeceiling->bottom.plane->Zat0();
if (ViewPos.Z < ceilingZ && ceilingZ == sclipTop)
{
hz = spr->fakeceiling->top.plane->Zat0();
}
}
int h = xs_RoundToInt(CenterY - (hz - ViewPos.Z) * scale);
if (h > topclip)
{
topclip = short(MIN(h, viewheight));
}
}
hzt = MIN(hzt, sclipTop);
}
#if 0
// [RH] Sprites that were split by a drawseg should also be clipped
// by the sector's floor and ceiling. (Not sure how/if to handle this
// with fake floors, since those already do clipping.)
if (spr->bSplitSprite &&
(spr->heightsec == NULL || (spr->heightsec->MoreFlags & SECF_IGNOREHEIGHTSEC)))
{
fixed_t h = spr->sector->floorplane.ZatPoint (spr->gx, spr->gy);
h = (centeryfrac - FixedMul (h-viewz, scale)) >> FRACBITS;
if (h < botclip)
{
botclip = MAX<short> (0, h);
}
h = spr->sector->ceilingplane.ZatPoint (spr->gx, spr->gy);
h = (centeryfrac - FixedMul (h-viewz, scale)) >> FRACBITS;
if (h > topclip)
{
topclip = short(MIN(h, viewheight));
}
}
#endif
if (topclip >= botclip)
{
spr->Style.BaseColormap = colormap;
spr->Style.ColormapNum = colormapnum;
return;
}
i = x2 - x1;
clip1 = clipbot + x1;
clip2 = cliptop + x1;
do
{
*clip1++ = botclip;
*clip2++ = topclip;
} while (--i);
// Scan drawsegs from end to start for obscuring segs.
// The first drawseg that is closer than the sprite is the clip seg.
// Modified by Lee Killough:
// (pointer check was originally nonportable
// and buggy, by going past LEFT end of array):
// for (ds=ds_p-1 ; ds >= drawsegs ; ds--) old buggy code
for (ds = ds_p; ds-- > firstdrawseg; ) // new -- killough
{
// [ZZ] portal handling here
//if (ds->CurrentPortalUniq != spr->CurrentPortalUniq)
// continue;
// [ZZ] WARNING: uncommenting the two above lines, totally breaks sprite clipping
// kg3D - no clipping on fake segs
if (ds->fake) continue;
// determine if the drawseg obscures the sprite
if (ds->x1 >= x2 || ds->x2 <= x1 ||
(!(ds->silhouette & SIL_BOTH) && ds->maskedtexturecol == -1 &&
!ds->bFogBoundary) )
{
// does not cover sprite
continue;
}
r1 = MAX<int> (ds->x1, x1);
r2 = MIN<int> (ds->x2, x2);
float neardepth, fardepth;
if (!spr->bWallSprite)
{
if (ds->sz1 < ds->sz2)
{
neardepth = ds->sz1, fardepth = ds->sz2;
}
else
{
neardepth = ds->sz2, fardepth = ds->sz1;
}
}
// Check if sprite is in front of draw seg:
if ((!spr->bWallSprite && neardepth > spr->depth) || ((spr->bWallSprite || fardepth > spr->depth) &&
(spr->gpos.Y - ds->curline->v1->fY()) * (ds->curline->v2->fX() - ds->curline->v1->fX()) -
(spr->gpos.X - ds->curline->v1->fX()) * (ds->curline->v2->fY() - ds->curline->v1->fY()) <= 0))
{
// seg is behind sprite, so draw the mid texture if it has one
if (ds->CurrentPortalUniq == CurrentPortalUniq && // [ZZ] instead, portal uniq check is made here
(ds->maskedtexturecol != -1 || ds->bFogBoundary))
R_RenderMaskedSegRange (ds, r1, r2);
continue;
}
// clip this piece of the sprite
// killough 3/27/98: optimized and made much shorter
// [RH] Optimized further (at least for VC++;
// other compilers should be at least as good as before)
if (ds->silhouette & SIL_BOTTOM) //bottom sil
{
clip1 = clipbot + r1;
clip2 = openings + ds->sprbottomclip + r1 - ds->x1;
i = r2 - r1;
do
{
if (*clip1 > *clip2)
*clip1 = *clip2;
clip1++;
clip2++;
} while (--i);
}
if (ds->silhouette & SIL_TOP) // top sil
{
clip1 = cliptop + r1;
clip2 = openings + ds->sprtopclip + r1 - ds->x1;
i = r2 - r1;
do
{
if (*clip1 < *clip2)
*clip1 = *clip2;
clip1++;
clip2++;
} while (--i);
}
}
// all clipping has been performed, so draw the sprite
if (!spr->bIsVoxel)
{
mfloorclip = clipbot;
mceilingclip = cliptop;
if (!spr->bWallSprite)
{
R_DrawVisSprite(spr);
}
else
{
R_DrawWallSprite(spr);
}
}
else
{
// If it is completely clipped away, don't bother drawing it.
if (cliptop[x2] >= clipbot[x2])
{
for (i = x1; i < x2; ++i)
{
if (cliptop[i] < clipbot[i])
{
break;
}
}
if (i == x2)
{
spr->Style.BaseColormap = colormap;
spr->Style.ColormapNum = colormapnum;
return;
}
}
// Add everything outside the left and right edges to the clipping array
// for R_DrawVisVoxel().
if (x1 > 0)
{
fillshort(cliptop, x1, viewheight);
}
if (x2 < viewwidth - 1)
{
fillshort(cliptop + x2, viewwidth - x2, viewheight);
}
int minvoxely = spr->gzt <= hzt ? 0 : xs_RoundToInt((spr->gzt - hzt) / spr->yscale);
int maxvoxely = spr->gzb > hzb ? INT_MAX : xs_RoundToInt((spr->gzt - hzb) / spr->yscale);
R_DrawVisVoxel(spr, minvoxely, maxvoxely, cliptop, clipbot);
}
spr->Style.BaseColormap = colormap;
spr->Style.ColormapNum = colormapnum;
}
// kg3D:
// R_DrawMasked contains sorting
// original renamed to R_DrawMaskedSingle
void R_DrawMaskedSingle (bool renew)
{
drawseg_t *ds;
int i;
#if 0
R_SplitVisSprites ();
#endif
for (i = vsprcount; i > 0; i--)
{
if (spritesorter[i-1]->CurrentPortalUniq != CurrentPortalUniq)
continue; // probably another time
R_DrawSprite (spritesorter[i-1]);
}
// render any remaining masked mid textures
// Modified by Lee Killough:
// (pointer check was originally nonportable
// and buggy, by going past LEFT end of array):
// for (ds=ds_p-1 ; ds >= drawsegs ; ds--) old buggy code
if (renew)
{
fake3D |= FAKE3D_REFRESHCLIP;
}
for (ds = ds_p; ds-- > firstdrawseg; ) // new -- killough
{
// [ZZ] the same as above
if (ds->CurrentPortalUniq != CurrentPortalUniq)
continue;
// kg3D - no fake segs
if (ds->fake) continue;
if (ds->maskedtexturecol != -1 || ds->bFogBoundary)
{
R_RenderMaskedSegRange (ds, ds->x1, ds->x2);
}
}
}
void R_DrawHeightPlanes(double height); // kg3D - fake planes
void R_DrawMasked (void)
{
R_CollectPortals();
R_SortVisSprites (DrewAVoxel ? sv_compare2d : sv_compare, firstvissprite - vissprites);
if (height_top == NULL)
{ // kg3D - no visible 3D floors, normal rendering
R_DrawMaskedSingle(false);
}
else
{ // kg3D - correct sorting
HeightLevel *hl;
// ceilings
for (hl = height_cur; hl != NULL && hl->height >= ViewPos.Z; hl = hl->prev)
{
if (hl->next)
{
fake3D = FAKE3D_CLIPBOTTOM | FAKE3D_CLIPTOP;
sclipTop = hl->next->height;
}
else
{
fake3D = FAKE3D_CLIPBOTTOM;
}
sclipBottom = hl->height;
R_DrawMaskedSingle(true);
R_DrawHeightPlanes(hl->height);
}
// floors
fake3D = FAKE3D_DOWN2UP | FAKE3D_CLIPTOP;
sclipTop = height_top->height;
R_DrawMaskedSingle(true);
hl = height_top;
for (hl = height_top; hl != NULL && hl->height < ViewPos.Z; hl = hl->next)
{
R_DrawHeightPlanes(hl->height);
if (hl->next)
{
fake3D = FAKE3D_DOWN2UP | FAKE3D_CLIPTOP | FAKE3D_CLIPBOTTOM;
sclipTop = hl->next->height;
}
else
{
fake3D = FAKE3D_DOWN2UP | FAKE3D_CLIPBOTTOM;
}
sclipBottom = hl->height;
R_DrawMaskedSingle(true);
}
R_3D_DeleteHeights();
fake3D = 0;
}
R_DrawPlayerSprites();
}
extern double BaseYaspectMul;;
inline int sgn(int v)
{
return v < 0 ? -1 : v > 0 ? 1 : 0;
}
#if 0
void R_DrawVoxel(const FVector3 &globalpos, FAngle viewangle,
const FVector3 &dasprpos, DAngle dasprang,
fixed_t daxscale, fixed_t dayscale, FVoxel *voxobj,
FSWColormap *colormap, int colormapnum, short *daumost, short *dadmost, int minslabz, int maxslabz, int flags)
{
int i, j, k, x, y, syoff, ggxstart, ggystart, nxoff;
fixed_t cosang, sinang, sprcosang, sprsinang;
int backx, backy, gxinc, gyinc;
int daxscalerecip, dayscalerecip, cnt, gxstart, gystart, dazscale;
int lx, rx, nx, ny, x1=0, y1=0, x2=0, y2=0, yinc=0;
int yoff, xs=0, ys=0, xe, ye, xi=0, yi=0, cbackx, cbacky, dagxinc, dagyinc;
kvxslab_t *voxptr, *voxend;
FVoxelMipLevel *mip;
int z1a[64], z2a[64], yplc[64];
const int nytooclose = centerxwide * 2100, nytoofar = 32768*32768 - 1048576;
const int xdimenscale = FLOAT2FIXED(centerxwide * YaspectMul / 160);
const double centerxwide_f = centerxwide;
const double centerxwidebig_f = centerxwide_f * 65536*65536*8;
// Convert to Build's coordinate system.
fixed_t globalposx = xs_Fix<4>::ToFix(globalpos.X);
fixed_t globalposy = xs_Fix<4>::ToFix(-globalpos.Y);
fixed_t globalposz = xs_Fix<8>::ToFix(-globalpos.Z);
fixed_t dasprx = xs_Fix<4>::ToFix(dasprpos.X);
fixed_t daspry = xs_Fix<4>::ToFix(-dasprpos.Y);
fixed_t dasprz = xs_Fix<8>::ToFix(-dasprpos.Z);
// Shift the scales from 16 bits of fractional precision to 6.
// Also do some magic voodoo scaling to make them the right size.
daxscale = daxscale / (0xC000 >> 6);
dayscale = dayscale / (0xC000 >> 6);
if (daxscale <= 0 || dayscale <= 0)
{
// won't be visible.
return;
}
angle_t viewang = viewangle.BAMs();
cosang = FLOAT2FIXED(viewangle.Cos()) >> 2;
sinang = FLOAT2FIXED(-viewangle.Sin()) >> 2;
sprcosang = FLOAT2FIXED(dasprang.Cos()) >> 2;
sprsinang = FLOAT2FIXED(-dasprang.Sin()) >> 2;
R_SetupDrawSlab(colormap, 0.0f, colormapnum << FRACBITS);
int pixelsize = r_swtruecolor ? 4 : 1;
// Select mip level
i = abs(DMulScale6(dasprx - globalposx, cosang, daspry - globalposy, sinang));
i = DivScale6(i, MIN(daxscale, dayscale));
j = xs_Fix<13>::ToFix(FocalLengthX);
for (k = 0; i >= j && k < voxobj->NumMips; ++k)
{
i >>= 1;
}
if (k >= voxobj->NumMips) k = voxobj->NumMips - 1;
mip = &voxobj->Mips[k]; if (mip->SlabData == NULL) return;
minslabz >>= k;
maxslabz >>= k;
daxscale <<= (k+8); dayscale <<= (k+8);
dazscale = FixedDiv(dayscale, FLOAT2FIXED(BaseYaspectMul));
daxscale = fixed_t(daxscale / YaspectMul);
daxscale = Scale(daxscale, xdimenscale, centerxwide << 9);
dayscale = Scale(dayscale, FixedMul(xdimenscale, viewingrangerecip), centerxwide << 9);
daxscalerecip = (1<<30) / daxscale;
dayscalerecip = (1<<30) / dayscale;
fixed_t piv_x = fixed_t(mip->Pivot.X*256.);
fixed_t piv_y = fixed_t(mip->Pivot.Y*256.);
fixed_t piv_z = fixed_t(mip->Pivot.Z*256.);
x = FixedMul(globalposx - dasprx, daxscalerecip);
y = FixedMul(globalposy - daspry, daxscalerecip);
backx = (DMulScale10(x, sprcosang, y, sprsinang) + piv_x) >> 8;
backy = (DMulScale10(y, sprcosang, x, -sprsinang) + piv_y) >> 8;
cbackx = clamp(backx, 0, mip->SizeX - 1);
cbacky = clamp(backy, 0, mip->SizeY - 1);
sprcosang = MulScale14(daxscale, sprcosang);
sprsinang = MulScale14(daxscale, sprsinang);
x = (dasprx - globalposx) - DMulScale18(piv_x, sprcosang, piv_y, -sprsinang);
y = (daspry - globalposy) - DMulScale18(piv_y, sprcosang, piv_x, sprsinang);
cosang = FixedMul(cosang, dayscalerecip);
sinang = FixedMul(sinang, dayscalerecip);
gxstart = y*cosang - x*sinang;
gystart = x*cosang + y*sinang;
gxinc = DMulScale10(sprsinang, cosang, sprcosang, -sinang);
gyinc = DMulScale10(sprcosang, cosang, sprsinang, sinang);
if ((abs(globalposz - dasprz) >> 10) >= abs(dazscale)) return;
x = 0; y = 0; j = MAX(mip->SizeX, mip->SizeY);
fixed_t *ggxinc = (fixed_t *)alloca((j + 1) * sizeof(fixed_t) * 2);
fixed_t *ggyinc = ggxinc + (j + 1);
for (i = 0; i <= j; i++)
{
ggxinc[i] = x; x += gxinc;
ggyinc[i] = y; y += gyinc;
}
syoff = DivScale21(globalposz - dasprz, FixedMul(dazscale, 0xE800)) + (piv_z << 7);
yoff = (abs(gxinc) + abs(gyinc)) >> 1;
for (cnt = 0; cnt < 8; cnt++)
{
switch (cnt)
{
case 0: xs = 0; ys = 0; xi = 1; yi = 1; break;
case 1: xs = mip->SizeX-1; ys = 0; xi = -1; yi = 1; break;
case 2: xs = 0; ys = mip->SizeY-1; xi = 1; yi = -1; break;
case 3: xs = mip->SizeX-1; ys = mip->SizeY-1; xi = -1; yi = -1; break;
case 4: xs = 0; ys = cbacky; xi = 1; yi = 2; break;
case 5: xs = mip->SizeX-1; ys = cbacky; xi = -1; yi = 2; break;
case 6: xs = cbackx; ys = 0; xi = 2; yi = 1; break;
case 7: xs = cbackx; ys = mip->SizeY-1; xi = 2; yi = -1; break;
}
xe = cbackx; ye = cbacky;
if (cnt < 4)
{
if ((xi < 0) && (xe >= xs)) continue;
if ((xi > 0) && (xe <= xs)) continue;
if ((yi < 0) && (ye >= ys)) continue;
if ((yi > 0) && (ye <= ys)) continue;
}
else
{
if ((xi < 0) && (xe > xs)) continue;
if ((xi > 0) && (xe < xs)) continue;
if ((yi < 0) && (ye > ys)) continue;
if ((yi > 0) && (ye < ys)) continue;
xe += xi; ye += yi;
}
i = sgn(ys - backy) + sgn(xs - backx) * 3 + 4;
switch(i)
{
case 6: case 7: x1 = 0; y1 = 0; break;
case 8: case 5: x1 = gxinc; y1 = gyinc; break;
case 0: case 3: x1 = gyinc; y1 = -gxinc; break;
case 2: case 1: x1 = gxinc+gyinc; y1 = gyinc-gxinc; break;
}
switch(i)
{
case 2: case 5: x2 = 0; y2 = 0; break;
case 0: case 1: x2 = gxinc; y2 = gyinc; break;
case 8: case 7: x2 = gyinc; y2 = -gxinc; break;
case 6: case 3: x2 = gxinc+gyinc; y2 = gyinc-gxinc; break;
}
BYTE oand = (1 << int(xs<backx)) + (1 << (int(ys<backy)+2));
BYTE oand16 = oand + 16;
BYTE oand32 = oand + 32;
if (yi > 0) { dagxinc = gxinc; dagyinc = FixedMul(gyinc, viewingrangerecip); }
else { dagxinc = -gxinc; dagyinc = -FixedMul(gyinc, viewingrangerecip); }
/* Fix for non 90 degree viewing ranges */
nxoff = FixedMul(x2 - x1, viewingrangerecip);
x1 = FixedMul(x1, viewingrangerecip);
ggxstart = gxstart + ggyinc[ys];
ggystart = gystart - ggxinc[ys];
for (x = xs; x != xe; x += xi)
{
BYTE *slabxoffs = &mip->SlabData[mip->OffsetX[x]];
short *xyoffs = &mip->OffsetXY[x * (mip->SizeY + 1)];
nx = FixedMul(ggxstart + ggxinc[x], viewingrangerecip) + x1;
ny = ggystart + ggyinc[x];
for (y = ys; y != ye; y += yi, nx += dagyinc, ny -= dagxinc)
{
if ((ny <= nytooclose) || (ny >= nytoofar)) continue;
voxptr = (kvxslab_t *)(slabxoffs + xyoffs[y]);
voxend = (kvxslab_t *)(slabxoffs + xyoffs[y+1]);
if (voxptr >= voxend) continue;
lx = xs_RoundToInt(nx * centerxwide_f / (ny + y1)) + centerx;
if (lx < 0) lx = 0;
rx = xs_RoundToInt((nx + nxoff) * centerxwide_f / (ny + y2)) + centerx;
if (rx > viewwidth) rx = viewwidth;
if (rx <= lx) continue;
if (flags & DVF_MIRRORED)
{
int t = viewwidth - lx;
lx = viewwidth - rx;
rx = t;
}
fixed_t l1 = xs_RoundToInt(centerxwidebig_f / (ny - yoff));
fixed_t l2 = xs_RoundToInt(centerxwidebig_f / (ny + yoff));
for (; voxptr < voxend; voxptr = (kvxslab_t *)((BYTE *)voxptr + voxptr->zleng + 3))
{
const BYTE *col = voxptr->col;
int zleng = voxptr->zleng;
int ztop = voxptr->ztop;
fixed_t z1, z2;
if (ztop < minslabz)
{
int diff = minslabz - ztop;
ztop = minslabz;
col += diff;
zleng -= diff;
}
if (ztop + zleng > maxslabz)
{
int diff = ztop + zleng - maxslabz;
zleng -= diff;
}
if (zleng <= 0) continue;
j = (ztop << 15) - syoff;
if (j < 0)
{
k = j + (zleng << 15);
if (k < 0)
{
if ((voxptr->backfacecull & oand32) == 0) continue;
z2 = MulScale32(l2, k) + centery; /* Below slab */
}
else
{
if ((voxptr->backfacecull & oand) == 0) continue; /* Middle of slab */
z2 = MulScale32(l1, k) + centery;
}
z1 = MulScale32(l1, j) + centery;
}
else
{
if ((voxptr->backfacecull & oand16) == 0) continue;
z1 = MulScale32(l2, j) + centery; /* Above slab */
z2 = MulScale32(l1, j + (zleng << 15)) + centery;
}
if (z2 <= z1) continue;
if (zleng == 1)
{
yinc = 0;
}
else
{
if (z2-z1 >= 1024) yinc = FixedDiv(zleng, z2 - z1);
else yinc = (((1 << 24) - 1) / (z2 - z1)) * zleng >> 8;
}
// [RH] Clip each column separately, not just by the first one.
for (int stripwidth = MIN<int>(countof(z1a), rx - lx), lxt = lx;
lxt < rx;
(lxt += countof(z1a)), stripwidth = MIN<int>(countof(z1a), rx - lxt))
{
// Calculate top and bottom pixels locations
for (int xxx = 0; xxx < stripwidth; ++xxx)
{
if (zleng == 1)
{
yplc[xxx] = 0;
z1a[xxx] = MAX<int>(z1, daumost[lxt + xxx]);
}
else
{
if (z1 < daumost[lxt + xxx])
{
yplc[xxx] = yinc * (daumost[lxt + xxx] - z1);
z1a[xxx] = daumost[lxt + xxx];
}
else
{
yplc[xxx] = 0;
z1a[xxx] = z1;
}
}
z2a[xxx] = MIN<int>(z2, dadmost[lxt + xxx]);
}
// Find top and bottom pixels that match and draw them as one strip
for (int xxl = 0, xxr; xxl < stripwidth; )
{
if (z1a[xxl] >= z2a[xxl])
{ // No column here
xxl++;
continue;
}
int z1 = z1a[xxl];
int z2 = z2a[xxl];
// How many columns share the same extents?
for (xxr = xxl + 1; xxr < stripwidth; ++xxr)
{
if (z1a[xxr] != z1 || z2a[xxr] != z2)
break;
}
if (!(flags & DVF_OFFSCREEN))
{
// Draw directly to the screen.
R_DrawSlab(xxr - xxl, yplc[xxl], z2 - z1, yinc, col, (ylookup[z1] + lxt + xxl) * pixelsize + dc_destorg);
}
else
{
// Record the area covered and possibly draw to an offscreen buffer.
dc_yl = z1;
dc_yh = z2 - 1;
dc_count = z2 - z1;
dc_iscale = yinc;
for (int x = xxl; x < xxr; ++x)
{
OffscreenCoverageBuffer->InsertSpan(lxt + x, z1, z2);
if (!(flags & DVF_SPANSONLY))
{
dc_x = lxt + x;
rt_initcols(OffscreenColorBuffer + (dc_x & ~3) * OffscreenBufferHeight);
dc_source = col;
dc_source2 = nullptr;
dc_texturefrac = yplc[xxl];
hcolfunc_pre();
}
}
}
xxl = xxr;
}
}
}
}
}
}
}
#endif
//==========================================================================
//
// FCoverageBuffer Constructor
//
//==========================================================================
FCoverageBuffer::FCoverageBuffer(int lists)
: Spans(NULL), FreeSpans(NULL)
{
NumLists = lists;
Spans = new Span *[lists];
memset(Spans, 0, sizeof(Span*)*lists);
}
//==========================================================================
//
// FCoverageBuffer Destructor
//
//==========================================================================
FCoverageBuffer::~FCoverageBuffer()
{
if (Spans != NULL)
{
delete[] Spans;
}
}
//==========================================================================
//
// FCoverageBuffer :: Clear
//
//==========================================================================
void FCoverageBuffer::Clear()
{
SpanArena.FreeAll();
memset(Spans, 0, sizeof(Span*)*NumLists);
FreeSpans = NULL;
}
//==========================================================================
//
// FCoverageBuffer :: InsertSpan
//
// start is inclusive.
// stop is exclusive.
//
//==========================================================================
void FCoverageBuffer::InsertSpan(int listnum, int start, int stop)
{
assert(unsigned(listnum) < NumLists);
assert(start < stop);
Span **span_p = &Spans[listnum];
Span *span;
if (*span_p == NULL || (*span_p)->Start > stop)
{ // This list is empty or the first entry is after this one, so we can just insert the span.
goto addspan;
}
// Insert the new span in order, merging with existing ones.
while (*span_p != NULL)
{
if ((*span_p)->Stop < start) // ===== (existing span)
{ // Span ends before this one starts. // ++++ (new span)
span_p = &(*span_p)->NextSpan;
continue;
}
// Does the new span overlap or abut the existing one?
if ((*span_p)->Start <= start)
{
if ((*span_p)->Stop >= stop) // =============
{ // The existing span completely covers this one. // +++++
return;
}
extend: // Extend the existing span with the new one. // ======
span = *span_p; // +++++++
span->Stop = stop; // (or) +++++
// Free up any spans we just covered up.
span_p = &(*span_p)->NextSpan;
while (*span_p != NULL && (*span_p)->Start <= stop && (*span_p)->Stop <= stop)
{
Span *span = *span_p; // ====== ======
*span_p = span->NextSpan; // +++++++++++++
span->NextSpan = FreeSpans;
FreeSpans = span;
}
if (*span_p != NULL && (*span_p)->Start <= stop) // ======= ========
{ // Our new span connects two existing spans. // ++++++++++++++
// They should all be collapsed into a single span.
span->Stop = (*span_p)->Stop;
span = *span_p;
*span_p = span->NextSpan;
span->NextSpan = FreeSpans;
FreeSpans = span;
}
goto check;
}
else if ((*span_p)->Start <= stop) // =====
{ // The new span extends the existing span from // ++++
// the beginning. // (or) ++++
(*span_p)->Start = start;
if ((*span_p)->Stop < stop)
{ // The new span also extends the existing span // ======
// at the bottom // ++++++++++++++
goto extend;
}
goto check;
}
else // ======
{ // No overlap, so insert a new span. // +++++
goto addspan;
}
}
// Append a new span to the end of the list.
addspan:
span = AllocSpan();
span->NextSpan = *span_p;
span->Start = start;
span->Stop = stop;
*span_p = span;
check:
#ifdef _DEBUG
// Validate the span list: Spans must be in order, and there must be
// at least one pixel between spans.
for (span = Spans[listnum]; span != NULL; span = span->NextSpan)
{
assert(span->Start < span->Stop);
if (span->NextSpan != NULL)
{
assert(span->Stop < span->NextSpan->Start);
}
}
#endif
;
}
//==========================================================================
//
// FCoverageBuffer :: AllocSpan
//
//==========================================================================
FCoverageBuffer::Span *FCoverageBuffer::AllocSpan()
{
Span *span;
if (FreeSpans != NULL)
{
span = FreeSpans;
FreeSpans = span->NextSpan;
}
else
{
span = (Span *)SpanArena.Alloc(sizeof(Span));
}
return span;
}
//==========================================================================
//
// R_CheckOffscreenBuffer
//
// Allocates the offscreen coverage buffer and optionally the offscreen
// color buffer. If they already exist but are the wrong size, they will
// be reallocated.
//
//==========================================================================
void R_CheckOffscreenBuffer(int width, int height, bool spansonly)
{
if (OffscreenCoverageBuffer == NULL)
{
assert(OffscreenColorBuffer == NULL && "The color buffer cannot exist without the coverage buffer");
OffscreenCoverageBuffer = new FCoverageBuffer(width);
}
else if (OffscreenCoverageBuffer->NumLists != (unsigned)width)
{
delete OffscreenCoverageBuffer;
OffscreenCoverageBuffer = new FCoverageBuffer(width);
if (OffscreenColorBuffer != NULL)
{
delete[] OffscreenColorBuffer;
OffscreenColorBuffer = NULL;
}
}
else
{
OffscreenCoverageBuffer->Clear();
}
if (!spansonly)
{
if (OffscreenColorBuffer == NULL)
{
OffscreenColorBuffer = new BYTE[width * height * 4];
}
else if (OffscreenBufferWidth != width || OffscreenBufferHeight != height)
{
delete[] OffscreenColorBuffer;
OffscreenColorBuffer = new BYTE[width * height * 4];
}
}
OffscreenBufferWidth = width;
OffscreenBufferHeight = height;
}
}
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