zdoom/qzdoom
0
0
Fork 0
mirror of https://github.com/ZDoom/qzdoom.git synced 2024-11-28 23:12:24 +00:00
Code Issues Projects Releases Packages Wiki Activity

- moved wallscan code into its own file so that it can get an appropriate copyright notice and does not inflate an already large source file even more.

Browse source
This commit is contained in:
Christoph Oelckers 2016-12-09 11:49:18 +01:00
parent 8748b9ef6d
commit 34d551fe1f
4 changed files with 588 additions and 542 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
src/CMakeLists.txt
View file

@ -755,6 +755,7 @@ set( FASTMATH_PCH_SOURCES
r_segs.cpp
r_sky.cpp
r_things.cpp
r_wallscan.cpp
s_advsound.cpp
s_environment.cpp
s_playlist.cpp

2
src/r_draw.h
View file

@ -104,8 +104,6 @@ namespace swrenderer
const uint8_t *R_GetColumn(FTexture *tex, int col);
void wallscan(int x1, int x2, short *uwal, short *dwal, float *swal, fixed_t *lwal, double yrepeat, const uint8_t *(*getcol)(FTexture *tex, int col) = R_GetColumn);
void maskwallscan(int x1, int x2, short *uwal, short *dwal, float *swal, fixed_t *lwal, double yrepeat, const uint8_t *(*getcol)(FTexture *tex, int col) = R_GetColumn);
void transmaskwallscan(int x1, int x2, short *uwal, short *dwal, float *swal, fixed_t *lwal, double yrepeat, const uint8_t *(*getcol)(FTexture *tex, int col) = R_GetColumn);
void rt_initcols(uint8_t *buffer = nullptr);
void rt_span_coverage(int x, int start, int stop);

544
src/r_segs.cpp
View file

@ -56,7 +56,6 @@
#define WALLYREPEAT 8
CVAR(Bool, r_np2, true, 0)
CVAR(Bool, r_fogboundary, true, 0)
CVAR(Bool, r_drawmirrors, true, 0)
EXTERN_CVAR(Bool, r_fullbrightignoresectorcolor);
@ -65,6 +64,10 @@ namespace swrenderer
{
using namespace drawerargs;
void call_wallscan(int x1, int x2, short *uwal, short *dwal, float *swal, fixed_t *lwal, double yrepeat, bool mask);
void wallscan_np2(int x1, int x2, short *uwal, short *dwal, float *swal, fixed_t *lwal, double yrepeat, double top, double bot, bool mask);
void wallscan_np2_ds(drawseg_t *ds, int x1, int x2, short *uwal, short *dwal, float *swal, fixed_t *lwal, double yrepeat);
#define HEIGHTBITS 12
#define HEIGHTSHIFT (FRACBITS-HEIGHTBITS)
@ -140,9 +143,6 @@ static fixed_t *maskedtexturecol;
static void R_RenderDecal (side_t *wall, DBaseDecal *first, drawseg_t *clipper, int pass);
static void WallSpriteColumn (void (*drawfunc)(const BYTE *column, const FTexture::Span *spans));
void wallscan_np2(int x1, int x2, short *uwal, short *dwal, float *swal, fixed_t *lwal, double yrepeat, double top, double bot, bool mask);
static void wallscan_np2_ds(drawseg_t *ds, int x1, int x2, short *uwal, short *dwal, float *swal, fixed_t *lwal, double yrepeat);
static void call_wallscan(int x1, int x2, short *uwal, short *dwal, float *swal, fixed_t *lwal, double yrepeat, bool mask);
inline bool IsFogBoundary (sector_t *front, sector_t *back)
{
@ -1051,542 +1051,6 @@ void R_RenderFakeWallRange (drawseg_t *ds, int x1, int x2)
return;
}
struct WallscanSampler
{
WallscanSampler() { }
WallscanSampler(int y1, float swal, double yrepeat, fixed_t xoffset, FTexture *texture, const BYTE*(*getcol)(FTexture *texture, int x));
uint32_t uv_pos;
uint32_t uv_step;
uint32_t uv_max;
const BYTE *source;
uint32_t height;
};
WallscanSampler::WallscanSampler(int y1, float swal, double yrepeat, fixed_t xoffset, FTexture *texture, const BYTE*(*getcol)(FTexture *texture, int x))
{
height = texture->GetHeight();
int uv_fracbits = 32 - texture->HeightBits;
if (uv_fracbits != 32)
{
uv_max = height << uv_fracbits;
// Find start uv in [0-base_height[ range.
// Not using xs_ToFixed because it rounds the result and we need something that always rounds down to stay within the range.
double uv_stepd = swal * yrepeat;
double v = (dc_texturemid + uv_stepd * (y1 - CenterY + 0.5)) / height;
v = v - floor(v);
v *= height;
v *= (1 << uv_fracbits);
uv_pos = (uint32_t)v;
uv_step = xs_ToFixed(uv_fracbits, uv_stepd);
if (uv_step == 0) // To prevent divide by zero elsewhere
uv_step = 1;
}
else
{ // Hack for one pixel tall textures
uv_pos = 0;
uv_step = 0;
uv_max = 1;
}
source = getcol(texture, xoffset >> FRACBITS);
}
// Draw a column with support for non-power-of-two ranges
void wallscan_drawcol1(int x, int y1, int y2, WallscanSampler &sampler, DWORD(*draw1column)())
{
if (sampler.uv_max == 0 || sampler.uv_step == 0) // power of two
{
int count = y2 - y1;
dc_source = sampler.source;
dc_dest = (ylookup[y1] + x) + dc_destorg;
dc_count = count;
dc_iscale = sampler.uv_step;
dc_texturefrac = sampler.uv_pos;
draw1column();
uint64_t step64 = sampler.uv_step;
uint64_t pos64 = sampler.uv_pos;
sampler.uv_pos = (uint32_t)(pos64 + step64 * count);
}
else
{
uint32_t uv_pos = sampler.uv_pos;
uint32_t left = y2 - y1;
while (left > 0)
{
uint32_t available = sampler.uv_max - uv_pos;
uint32_t next_uv_wrap = available / sampler.uv_step;
if (available % sampler.uv_step != 0)
next_uv_wrap++;
uint32_t count = MIN(left, next_uv_wrap);
dc_source = sampler.source;
dc_dest = (ylookup[y1] + x) + dc_destorg;
dc_count = count;
dc_iscale = sampler.uv_step;
dc_texturefrac = uv_pos;
draw1column();
left -= count;
uv_pos += sampler.uv_step * count;
if (uv_pos >= sampler.uv_max)
uv_pos -= sampler.uv_max;
}
sampler.uv_pos = uv_pos;
}
}
// Draw four columns with support for non-power-of-two ranges
void wallscan_drawcol4(int x, int y1, int y2, WallscanSampler *sampler, void(*draw4columns)())
{
if (sampler[0].uv_max == 0 || sampler[0].uv_step == 0) // power of two, no wrap handling needed
{
int count = y2 - y1;
for (int i = 0; i < 4; i++)
{
bufplce[i] = sampler[i].source;
vplce[i] = sampler[i].uv_pos;
vince[i] = sampler[i].uv_step;
uint64_t step64 = sampler[i].uv_step;
uint64_t pos64 = sampler[i].uv_pos;
sampler[i].uv_pos = (uint32_t)(pos64 + step64 * count);
}
dc_dest = (ylookup[y1] + x) + dc_destorg;
dc_count = count;
draw4columns();
}
else
{
dc_dest = (ylookup[y1] + x) + dc_destorg;
for (int i = 0; i < 4; i++)
{
bufplce[i] = sampler[i].source;
}
uint32_t left = y2 - y1;
while (left > 0)
{
// Find which column wraps first
uint32_t count = left;
for (int i = 0; i < 4; i++)
{
uint32_t available = sampler[i].uv_max - sampler[i].uv_pos;
uint32_t next_uv_wrap = available / sampler[i].uv_step;
if (available % sampler[i].uv_step != 0)
next_uv_wrap++;
count = MIN(next_uv_wrap, count);
}
// Draw until that column wraps
for (int i = 0; i < 4; i++)
{
vplce[i] = sampler[i].uv_pos;
vince[i] = sampler[i].uv_step;
}
dc_count = count;
draw4columns();
// Wrap the uv position
for (int i = 0; i < 4; i++)
{
sampler[i].uv_pos += sampler[i].uv_step * count;
if (sampler[i].uv_pos >= sampler[i].uv_max)
sampler[i].uv_pos -= sampler[i].uv_max;
}
left -= count;
}
}
}
typedef DWORD(*Draw1ColumnFuncPtr)();
typedef void(*Draw4ColumnsFuncPtr)();
void wallscan_any(
int x1, int x2, short *uwal, short *dwal, float *swal, fixed_t *lwal, double yrepeat,
const BYTE *(*getcol)(FTexture *tex, int x),
void(setupwallscan(int bits, Draw1ColumnFuncPtr &draw1, Draw4ColumnsFuncPtr &draw2)))
{
if (rw_pic->UseType == FTexture::TEX_Null)
return;
fixed_t xoffset = rw_offset;
rw_pic->GetHeight(); // To ensure that rw_pic->HeightBits has been set
int fracbits = 32 - rw_pic->HeightBits;
if (fracbits == 32)
{ // Hack for one pixel tall textures
fracbits = 0;
yrepeat = 0;
dc_texturemid = 0;
}
DWORD(*draw1column)();
void(*draw4columns)();
setupwallscan(fracbits, draw1column, draw4columns);
bool fixed = (fixedcolormap != NULL || fixedlightlev >= 0);
if (fixed)
{
palookupoffse[0] = dc_colormap;
palookupoffse[1] = dc_colormap;
palookupoffse[2] = dc_colormap;
palookupoffse[3] = dc_colormap;
}
if (fixedcolormap)
dc_colormap = fixedcolormap;
else
dc_colormap = basecolormap->Maps;
float light = rw_light;
// Calculate where 4 column alignment begins and ends:
int aligned_x1 = clamp((x1 + 3) / 4 * 4, x1, x2);
int aligned_x2 = clamp(x2 / 4 * 4, x1, x2);
// First unaligned columns:
for (int x = x1; x < aligned_x1; x++, light += rw_lightstep)
{
int y1 = uwal[x];
int y2 = dwal[x];
if (y2 <= y1)
continue;
if (!fixed)
dc_colormap = basecolormap->Maps + (GETPALOOKUP(light, wallshade) << COLORMAPSHIFT);
WallscanSampler sampler(y1, swal[x], yrepeat, lwal[x] + xoffset, rw_pic, getcol);
wallscan_drawcol1(x, y1, y2, sampler, draw1column);
}
// The aligned columns
for (int x = aligned_x1; x < aligned_x2; x += 4)
{
// Find y1, y2, light and uv values for four columns:
int y1[4] = { uwal[x], uwal[x + 1], uwal[x + 2], uwal[x + 3] };
int y2[4] = { dwal[x], dwal[x + 1], dwal[x + 2], dwal[x + 3] };
float lights[4];
for (int i = 0; i < 4; i++)
{
lights[i] = light;
light += rw_lightstep;
}
WallscanSampler sampler[4];
for (int i = 0; i < 4; i++)
sampler[i] = WallscanSampler(y1[i], swal[x + i], yrepeat, lwal[x + i] + xoffset, rw_pic, getcol);
// Figure out where we vertically can start and stop drawing 4 columns in one go
int middle_y1 = y1[0];
int middle_y2 = y2[0];
for (int i = 1; i < 4; i++)
{
middle_y1 = MAX(y1[i], middle_y1);
middle_y2 = MIN(y2[i], middle_y2);
}
// If we got an empty column in our set we cannot draw 4 columns in one go:
bool empty_column_in_set = false;
for (int i = 0; i < 4; i++)
{
if (y2[i] <= y1[i])
empty_column_in_set = true;
}
if (empty_column_in_set || middle_y2 <= middle_y1)
{
for (int i = 0; i < 4; i++)
{
if (y2[i] <= y1[i])
continue;
if (!fixed)
dc_colormap = basecolormap->Maps + (GETPALOOKUP(lights[i], wallshade) << COLORMAPSHIFT);
wallscan_drawcol1(x + i, y1[i], y2[i], sampler[i], draw1column);
}
continue;
}
// Draw the first rows where not all 4 columns are active
for (int i = 0; i < 4; i++)
{
if (!fixed)
dc_colormap = basecolormap->Maps + (GETPALOOKUP(lights[i], wallshade) << COLORMAPSHIFT);
if (y1[i] < middle_y1)
wallscan_drawcol1(x + i, y1[i], middle_y1, sampler[i], draw1column);
}
// Draw the area where all 4 columns are active
if (!fixed)
{
for (int i = 0; i < 4; i++)
{
palookupoffse[i] = basecolormap->Maps + (GETPALOOKUP(lights[i], wallshade) << COLORMAPSHIFT);
}
}
wallscan_drawcol4(x, middle_y1, middle_y2, sampler, draw4columns);
// Draw the last rows where not all 4 columns are active
for (int i = 0; i < 4; i++)
{
if (!fixed)
dc_colormap = basecolormap->Maps + (GETPALOOKUP(lights[i], wallshade) << COLORMAPSHIFT);
if (middle_y2 < y2[i])
wallscan_drawcol1(x + i, middle_y2, y2[i], sampler[i], draw1column);
}
}
// The last unaligned columns:
for (int x = aligned_x2; x < x2; x++, light += rw_lightstep)
{
int y1 = uwal[x];
int y2 = dwal[x];
if (y2 <= y1)
continue;
if (!fixed)
dc_colormap = basecolormap->Maps + (GETPALOOKUP(light, wallshade) << COLORMAPSHIFT);
WallscanSampler sampler(y1, swal[x], yrepeat, lwal[x] + xoffset, rw_pic, getcol);
wallscan_drawcol1(x, y1, y2, sampler, draw1column);
}
NetUpdate();
}
void wallscan(int x1, int x2, short *uwal, short *dwal, float *swal, fixed_t *lwal, double yrepeat, const BYTE *(*getcol)(FTexture *tex, int x))
{
wallscan_any(x1, x2, uwal, dwal, swal, lwal, yrepeat, getcol, [](int bits, Draw1ColumnFuncPtr &line1, Draw4ColumnsFuncPtr &line4)
{
setupvline(bits);
line1 = dovline1;
line4 = dovline4;
});
}
void maskwallscan(int x1, int x2, short *uwal, short *dwal, float *swal, fixed_t *lwal, double yrepeat, const BYTE *(*getcol)(FTexture *tex, int x))
{
if (!rw_pic->bMasked) // Textures that aren't masked can use the faster wallscan.
{
wallscan(x1, x2, uwal, dwal, swal, lwal, yrepeat, getcol);
}
else
{
wallscan_any(x1, x2, uwal, dwal, swal, lwal, yrepeat, getcol, [](int bits, Draw1ColumnFuncPtr &line1, Draw4ColumnsFuncPtr &line4)
{
setupmvline(bits);
line1 = domvline1;
line4 = domvline4;
});
}
}
void transmaskwallscan(int x1, int x2, short *uwal, short *dwal, float *swal, fixed_t *lwal, double yrepeat, const BYTE *(*getcol)(FTexture *tex, int x))
{
static fixed_t(*tmvline1)();
static void(*tmvline4)();
if (!R_GetTransMaskDrawers(&tmvline1, &tmvline4))
{
// The current translucency is unsupported, so draw with regular maskwallscan instead.
maskwallscan(x1, x2, uwal, dwal, swal, lwal, yrepeat, getcol);
}
else
{
wallscan_any(x1, x2, uwal, dwal, swal, lwal, yrepeat, getcol, [](int bits, Draw1ColumnFuncPtr &line1, Draw4ColumnsFuncPtr &line4)
{
setuptmvline(bits);
line1 = reinterpret_cast<DWORD(*)()>(tmvline1);
line4 = tmvline4;
});
}
}
void wallscan_striped (int x1, int x2, short *uwal, short *dwal, float *swal, fixed_t *lwal, double yrepeat)
{
FDynamicColormap *startcolormap = basecolormap;
int startshade = wallshade;
bool fogginess = foggy;
short most1[MAXWIDTH], most2[MAXWIDTH], most3[MAXWIDTH];
short *up, *down;
up = uwal;
down = most1;
assert(WallC.sx1 <= x1);
assert(WallC.sx2 >= x2);
// kg3D - fake floors instead of zdoom light list
for (unsigned int i = 0; i < frontsector->e->XFloor.lightlist.Size(); i++)
{
int j = WallMost (most3, frontsector->e->XFloor.lightlist[i].plane, &WallC);
if (j != 3)
{
for (int j = x1; j < x2; ++j)
{
down[j] = clamp (most3[j], up[j], dwal[j]);
}
wallscan (x1, x2, up, down, swal, lwal, yrepeat);
up = down;
down = (down == most1) ? most2 : most1;
}
lightlist_t *lit = &frontsector->e->XFloor.lightlist[i];
basecolormap = lit->extra_colormap;
wallshade = LIGHT2SHADE(curline->sidedef->GetLightLevel(fogginess,
*lit->p_lightlevel, lit->lightsource != NULL) + r_actualextralight);
}
wallscan (x1, x2, up, dwal, swal, lwal, yrepeat);
basecolormap = startcolormap;
wallshade = startshade;
}
static void call_wallscan(int x1, int x2, short *uwal, short *dwal, float *swal, fixed_t *lwal, double yrepeat, bool mask)
{
if (mask)
{
if (colfunc == basecolfunc)
{
maskwallscan(x1, x2, uwal, dwal, swal, lwal, yrepeat);
}
else
{
transmaskwallscan(x1, x2, uwal, dwal, swal, lwal, yrepeat);
}
}
else
{
if (fixedcolormap != NULL || fixedlightlev >= 0 || !(frontsector->e && frontsector->e->XFloor.lightlist.Size()))
{
wallscan(x1, x2, uwal, dwal, swal, lwal, yrepeat);
}
else
{
wallscan_striped(x1, x2, uwal, dwal, swal, lwal, yrepeat);
}
}
}
//=============================================================================
//
// wallscan_np2
//
// This is a wrapper around wallscan that helps it tile textures whose heights
// are not powers of 2. It divides the wall into texture-sized strips and calls
// wallscan for each of those. Since only one repetition of the texture fits
// in each strip, wallscan will not tile.
//
//=============================================================================
void wallscan_np2(int x1, int x2, short *uwal, short *dwal, float *swal, fixed_t *lwal, double yrepeat, double top, double bot, bool mask)
{
if (!r_np2)
{
call_wallscan(x1, x2, uwal, dwal, swal, lwal, yrepeat, mask);
}
else
{
short most1[MAXWIDTH], most2[MAXWIDTH], most3[MAXWIDTH];
short *up, *down;
double texheight = rw_pic->GetHeight();
double partition;
double scaledtexheight = texheight / yrepeat;
if (yrepeat >= 0)
{ // normal orientation: draw strips from top to bottom
partition = top - fmod(top - dc_texturemid / yrepeat - ViewPos.Z, scaledtexheight);
if (partition == top)
{
partition -= scaledtexheight;
}
up = uwal;
down = most1;
dc_texturemid = (partition - ViewPos.Z) * yrepeat + texheight;
while (partition > bot)
{
int j = OWallMost(most3, partition - ViewPos.Z, &WallC);
if (j != 3)
{
for (int j = x1; j < x2; ++j)
{
down[j] = clamp(most3[j], up[j], dwal[j]);
}
call_wallscan(x1, x2, up, down, swal, lwal, yrepeat, mask);
up = down;
down = (down == most1) ? most2 : most1;
}
partition -= scaledtexheight;
dc_texturemid -= texheight;
}
call_wallscan(x1, x2, up, dwal, swal, lwal, yrepeat, mask);
}
else
{ // upside down: draw strips from bottom to top
partition = bot - fmod(bot - dc_texturemid / yrepeat - ViewPos.Z, scaledtexheight);
up = most1;
down = dwal;
dc_texturemid = (partition - ViewPos.Z) * yrepeat + texheight;
while (partition < top)
{
int j = OWallMost(most3, partition - ViewPos.Z, &WallC);
if (j != 12)
{
for (int j = x1; j < x2; ++j)
{
up[j] = clamp(most3[j], uwal[j], down[j]);
}
call_wallscan(x1, x2, up, down, swal, lwal, yrepeat, mask);
down = up;
up = (up == most1) ? most2 : most1;
}
partition -= scaledtexheight;
dc_texturemid -= texheight;
}
call_wallscan(x1, x2, uwal, down, swal, lwal, yrepeat, mask);
}
}
}
static void wallscan_np2_ds(drawseg_t *ds, int x1, int x2, short *uwal, short *dwal, float *swal, fixed_t *lwal, double yrepeat)
{
if (rw_pic->GetHeight() != 1 << rw_pic->HeightBits)
{
double frontcz1 = ds->curline->frontsector->ceilingplane.ZatPoint(ds->curline->v1);
double frontfz1 = ds->curline->frontsector->floorplane.ZatPoint(ds->curline->v1);
double frontcz2 = ds->curline->frontsector->ceilingplane.ZatPoint(ds->curline->v2);
double frontfz2 = ds->curline->frontsector->floorplane.ZatPoint(ds->curline->v2);
double top = MAX(frontcz1, frontcz2);
double bot = MIN(frontfz1, frontfz2);
if (fake3D & FAKE3D_CLIPTOP)
{
top = MIN(top, sclipTop);
}
if (fake3D & FAKE3D_CLIPBOTTOM)
{
bot = MAX(bot, sclipBottom);
}
wallscan_np2(x1, x2, uwal, dwal, swal, lwal, yrepeat, top, bot, true);
}
else
{
call_wallscan(x1, x2, uwal, dwal, swal, lwal, yrepeat, true);
}
}
//
// R_RenderSegLoop
// Draws zero, one, or two textures for walls.

583
src/r_wallscan.cpp Normal file
View file

@ -0,0 +1,583 @@
/*
** Replacement for Build's wallscan free of any Build licensing issues.
** Copyright (c) 2016 Magnus Norddahl
**
** This software is provided 'as-is', without any express or implied
** warranty. In no event will the authors be held liable for any damages
** arising from the use of this software.
**
** Permission is granted to anyone to use this software for any purpose,
** including commercial applications, and to alter it and redistribute it
** freely, subject to the following restrictions:
**
** 1. The origin of this software must not be misrepresented; you must not
** claim that you wrote the original software. If you use this software
** in a product, an acknowledgment in the product documentation would be
** appreciated but is not required.
** 2. Altered source versions must be plainly marked as such, and must not be
** misrepresented as being the original software.
** 3. This notice may not be removed or altered from any source distribution.
**
*/
#include <stdlib.h>
#include <stddef.h>
#include "doomdef.h"
#include "doomstat.h"
#include "doomdata.h"
#include "r_local.h"
#include "r_sky.h"
#include "v_video.h"
#include "m_swap.h"
#include "a_sharedglobal.h"
#include "d_net.h"
#include "g_level.h"
#include "r_draw.h"
#include "r_bsp.h"
#include "r_plane.h"
#include "r_segs.h"
#include "r_3dfloors.h"
#include "v_palette.h"
#include "r_data/colormaps.h"
namespace swrenderer
{
using namespace drawerargs;
extern FTexture *rw_pic;
extern int wallshade;
struct WallscanSampler
{
WallscanSampler() { }
WallscanSampler(int y1, float swal, double yrepeat, fixed_t xoffset, FTexture *texture, const BYTE*(*getcol)(FTexture *texture, int x));
uint32_t uv_pos;
uint32_t uv_step;
uint32_t uv_max;
const BYTE *source;
uint32_t height;
};
WallscanSampler::WallscanSampler(int y1, float swal, double yrepeat, fixed_t xoffset, FTexture *texture, const BYTE*(*getcol)(FTexture *texture, int x))
{
height = texture->GetHeight();
int uv_fracbits = 32 - texture->HeightBits;
if (uv_fracbits != 32)
{
uv_max = height << uv_fracbits;
// Find start uv in [0-base_height[ range.
// Not using xs_ToFixed because it rounds the result and we need something that always rounds down to stay within the range.
double uv_stepd = swal * yrepeat;
double v = (dc_texturemid + uv_stepd * (y1 - CenterY + 0.5)) / height;
v = v - floor(v);
v *= height;
v *= (1 << uv_fracbits);
uv_pos = (uint32_t)v;
uv_step = xs_ToFixed(uv_fracbits, uv_stepd);
if (uv_step == 0) // To prevent divide by zero elsewhere
uv_step = 1;
}
else
{ // Hack for one pixel tall textures
uv_pos = 0;
uv_step = 0;
uv_max = 1;
}
source = getcol(texture, xoffset >> FRACBITS);
}
// Draw a column with support for non-power-of-two ranges
void wallscan_drawcol1(int x, int y1, int y2, WallscanSampler &sampler, DWORD(*draw1column)())
{
if (sampler.uv_max == 0 || sampler.uv_step == 0) // power of two
{
int count = y2 - y1;
dc_source = sampler.source;
dc_dest = (ylookup[y1] + x) + dc_destorg;
dc_count = count;
dc_iscale = sampler.uv_step;
dc_texturefrac = sampler.uv_pos;
draw1column();
uint64_t step64 = sampler.uv_step;
uint64_t pos64 = sampler.uv_pos;
sampler.uv_pos = (uint32_t)(pos64 + step64 * count);
}
else
{
uint32_t uv_pos = sampler.uv_pos;
uint32_t left = y2 - y1;
while (left > 0)
{
uint32_t available = sampler.uv_max - uv_pos;
uint32_t next_uv_wrap = available / sampler.uv_step;
if (available % sampler.uv_step != 0)
next_uv_wrap++;
uint32_t count = MIN(left, next_uv_wrap);
dc_source = sampler.source;
dc_dest = (ylookup[y1] + x) + dc_destorg;
dc_count = count;
dc_iscale = sampler.uv_step;
dc_texturefrac = uv_pos;
draw1column();
left -= count;
uv_pos += sampler.uv_step * count;
if (uv_pos >= sampler.uv_max)
uv_pos -= sampler.uv_max;
}
sampler.uv_pos = uv_pos;
}
}
// Draw four columns with support for non-power-of-two ranges
void wallscan_drawcol4(int x, int y1, int y2, WallscanSampler *sampler, void(*draw4columns)())
{
if (sampler[0].uv_max == 0 || sampler[0].uv_step == 0) // power of two, no wrap handling needed
{
int count = y2 - y1;
for (int i = 0; i < 4; i++)
{
bufplce[i] = sampler[i].source;
vplce[i] = sampler[i].uv_pos;
vince[i] = sampler[i].uv_step;
uint64_t step64 = sampler[i].uv_step;
uint64_t pos64 = sampler[i].uv_pos;
sampler[i].uv_pos = (uint32_t)(pos64 + step64 * count);
}
dc_dest = (ylookup[y1] + x) + dc_destorg;
dc_count = count;
draw4columns();
}
else
{
dc_dest = (ylookup[y1] + x) + dc_destorg;
for (int i = 0; i < 4; i++)
{
bufplce[i] = sampler[i].source;
}
uint32_t left = y2 - y1;
while (left > 0)
{
// Find which column wraps first
uint32_t count = left;
for (int i = 0; i < 4; i++)
{
uint32_t available = sampler[i].uv_max - sampler[i].uv_pos;
uint32_t next_uv_wrap = available / sampler[i].uv_step;
if (available % sampler[i].uv_step != 0)
next_uv_wrap++;
count = MIN(next_uv_wrap, count);
}
// Draw until that column wraps
for (int i = 0; i < 4; i++)
{
vplce[i] = sampler[i].uv_pos;
vince[i] = sampler[i].uv_step;
}
dc_count = count;
draw4columns();
// Wrap the uv position
for (int i = 0; i < 4; i++)
{
sampler[i].uv_pos += sampler[i].uv_step * count;
if (sampler[i].uv_pos >= sampler[i].uv_max)
sampler[i].uv_pos -= sampler[i].uv_max;
}
left -= count;
}
}
}
typedef DWORD(*Draw1ColumnFuncPtr)();
typedef void(*Draw4ColumnsFuncPtr)();
void wallscan_any(
int x1, int x2, short *uwal, short *dwal, float *swal, fixed_t *lwal, double yrepeat,
const BYTE *(*getcol)(FTexture *tex, int x),
void(setupwallscan(int bits, Draw1ColumnFuncPtr &draw1, Draw4ColumnsFuncPtr &draw2)))
{
if (rw_pic->UseType == FTexture::TEX_Null)
return;
fixed_t xoffset = rw_offset;
rw_pic->GetHeight(); // To ensure that rw_pic->HeightBits has been set
int fracbits = 32 - rw_pic->HeightBits;
if (fracbits == 32)
{ // Hack for one pixel tall textures
fracbits = 0;
yrepeat = 0;
dc_texturemid = 0;
}
DWORD(*draw1column)();
void(*draw4columns)();
setupwallscan(fracbits, draw1column, draw4columns);
bool fixed = (fixedcolormap != NULL || fixedlightlev >= 0);
if (fixed)
{
palookupoffse[0] = dc_colormap;
palookupoffse[1] = dc_colormap;
palookupoffse[2] = dc_colormap;
palookupoffse[3] = dc_colormap;
}
if (fixedcolormap)
dc_colormap = fixedcolormap;
else
dc_colormap = basecolormap->Maps;
float light = rw_light;
// Calculate where 4 column alignment begins and ends:
int aligned_x1 = clamp((x1 + 3) / 4 * 4, x1, x2);
int aligned_x2 = clamp(x2 / 4 * 4, x1, x2);
// First unaligned columns:
for (int x = x1; x < aligned_x1; x++, light += rw_lightstep)
{
int y1 = uwal[x];
int y2 = dwal[x];
if (y2 <= y1)
continue;
if (!fixed)
dc_colormap = basecolormap->Maps + (GETPALOOKUP(light, wallshade) << COLORMAPSHIFT);
WallscanSampler sampler(y1, swal[x], yrepeat, lwal[x] + xoffset, rw_pic, getcol);
wallscan_drawcol1(x, y1, y2, sampler, draw1column);
}
// The aligned columns
for (int x = aligned_x1; x < aligned_x2; x += 4)
{
// Find y1, y2, light and uv values for four columns:
int y1[4] = { uwal[x], uwal[x + 1], uwal[x + 2], uwal[x + 3] };
int y2[4] = { dwal[x], dwal[x + 1], dwal[x + 2], dwal[x + 3] };
float lights[4];
for (int i = 0; i < 4; i++)
{
lights[i] = light;
light += rw_lightstep;
}
WallscanSampler sampler[4];
for (int i = 0; i < 4; i++)
sampler[i] = WallscanSampler(y1[i], swal[x + i], yrepeat, lwal[x + i] + xoffset, rw_pic, getcol);
// Figure out where we vertically can start and stop drawing 4 columns in one go
int middle_y1 = y1[0];
int middle_y2 = y2[0];
for (int i = 1; i < 4; i++)
{
middle_y1 = MAX(y1[i], middle_y1);
middle_y2 = MIN(y2[i], middle_y2);
}
// If we got an empty column in our set we cannot draw 4 columns in one go:
bool empty_column_in_set = false;
for (int i = 0; i < 4; i++)
{
if (y2[i] <= y1[i])
empty_column_in_set = true;
}
if (empty_column_in_set || middle_y2 <= middle_y1)
{
for (int i = 0; i < 4; i++)
{
if (y2[i] <= y1[i])
continue;
if (!fixed)
dc_colormap = basecolormap->Maps + (GETPALOOKUP(lights[i], wallshade) << COLORMAPSHIFT);
wallscan_drawcol1(x + i, y1[i], y2[i], sampler[i], draw1column);
}
continue;
}
// Draw the first rows where not all 4 columns are active
for (int i = 0; i < 4; i++)
{
if (!fixed)
dc_colormap = basecolormap->Maps + (GETPALOOKUP(lights[i], wallshade) << COLORMAPSHIFT);
if (y1[i] < middle_y1)
wallscan_drawcol1(x + i, y1[i], middle_y1, sampler[i], draw1column);
}
// Draw the area where all 4 columns are active
if (!fixed)
{
for (int i = 0; i < 4; i++)
{
palookupoffse[i] = basecolormap->Maps + (GETPALOOKUP(lights[i], wallshade) << COLORMAPSHIFT);
}
}
wallscan_drawcol4(x, middle_y1, middle_y2, sampler, draw4columns);
// Draw the last rows where not all 4 columns are active
for (int i = 0; i < 4; i++)
{
if (!fixed)
dc_colormap = basecolormap->Maps + (GETPALOOKUP(lights[i], wallshade) << COLORMAPSHIFT);
if (middle_y2 < y2[i])
wallscan_drawcol1(x + i, middle_y2, y2[i], sampler[i], draw1column);
}
}
// The last unaligned columns:
for (int x = aligned_x2; x < x2; x++, light += rw_lightstep)
{
int y1 = uwal[x];
int y2 = dwal[x];
if (y2 <= y1)
continue;
if (!fixed)
dc_colormap = basecolormap->Maps + (GETPALOOKUP(light, wallshade) << COLORMAPSHIFT);
WallscanSampler sampler(y1, swal[x], yrepeat, lwal[x] + xoffset, rw_pic, getcol);
wallscan_drawcol1(x, y1, y2, sampler, draw1column);
}
NetUpdate();
}
void wallscan(int x1, int x2, short *uwal, short *dwal, float *swal, fixed_t *lwal, double yrepeat, const BYTE *(*getcol)(FTexture *tex, int x))
{
wallscan_any(x1, x2, uwal, dwal, swal, lwal, yrepeat, getcol, [](int bits, Draw1ColumnFuncPtr &line1, Draw4ColumnsFuncPtr &line4)
{
setupvline(bits);
line1 = dovline1;
line4 = dovline4;
});
}
void maskwallscan(int x1, int x2, short *uwal, short *dwal, float *swal, fixed_t *lwal, double yrepeat, const BYTE *(*getcol)(FTexture *tex, int x) = R_GetColumn)
{
if (!rw_pic->bMasked) // Textures that aren't masked can use the faster wallscan.
{
wallscan(x1, x2, uwal, dwal, swal, lwal, yrepeat, getcol);
}
else
{
wallscan_any(x1, x2, uwal, dwal, swal, lwal, yrepeat, getcol, [](int bits, Draw1ColumnFuncPtr &line1, Draw4ColumnsFuncPtr &line4)
{
setupmvline(bits);
line1 = domvline1;
line4 = domvline4;
});
}
}
void transmaskwallscan(int x1, int x2, short *uwal, short *dwal, float *swal, fixed_t *lwal, double yrepeat, const BYTE *(*getcol)(FTexture *tex, int x) = R_GetColumn)
{
static fixed_t(*tmvline1)();
static void(*tmvline4)();
if (!R_GetTransMaskDrawers(&tmvline1, &tmvline4))
{
// The current translucency is unsupported, so draw with regular maskwallscan instead.
maskwallscan(x1, x2, uwal, dwal, swal, lwal, yrepeat, getcol);
}
else
{
wallscan_any(x1, x2, uwal, dwal, swal, lwal, yrepeat, getcol, [](int bits, Draw1ColumnFuncPtr &line1, Draw4ColumnsFuncPtr &line4)
{
setuptmvline(bits);
line1 = reinterpret_cast<DWORD(*)()>(tmvline1);
line4 = tmvline4;
});
}
}
void wallscan_striped (int x1, int x2, short *uwal, short *dwal, float *swal, fixed_t *lwal, double yrepeat)
{
FDynamicColormap *startcolormap = basecolormap;
int startshade = wallshade;
bool fogginess = foggy;
short most1[MAXWIDTH], most2[MAXWIDTH], most3[MAXWIDTH];
short *up, *down;
up = uwal;
down = most1;
assert(WallC.sx1 <= x1);
assert(WallC.sx2 >= x2);
// kg3D - fake floors instead of zdoom light list
for (unsigned int i = 0; i < frontsector->e->XFloor.lightlist.Size(); i++)
{
int j = WallMost (most3, frontsector->e->XFloor.lightlist[i].plane, &WallC);
if (j != 3)
{
for (int j = x1; j < x2; ++j)
{
down[j] = clamp (most3[j], up[j], dwal[j]);
}
wallscan (x1, x2, up, down, swal, lwal, yrepeat);
up = down;
down = (down == most1) ? most2 : most1;
}
lightlist_t *lit = &frontsector->e->XFloor.lightlist[i];
basecolormap = lit->extra_colormap;
wallshade = LIGHT2SHADE(curline->sidedef->GetLightLevel(fogginess,
*lit->p_lightlevel, lit->lightsource != NULL) + r_actualextralight);
}
wallscan (x1, x2, up, dwal, swal, lwal, yrepeat);
basecolormap = startcolormap;
wallshade = startshade;
}
void call_wallscan(int x1, int x2, short *uwal, short *dwal, float *swal, fixed_t *lwal, double yrepeat, bool mask)
{
if (mask)
{
if (colfunc == basecolfunc)
{
maskwallscan(x1, x2, uwal, dwal, swal, lwal, yrepeat);
}
else
{
transmaskwallscan(x1, x2, uwal, dwal, swal, lwal, yrepeat);
}
}
else
{
if (fixedcolormap != NULL || fixedlightlev >= 0 || !(frontsector->e && frontsector->e->XFloor.lightlist.Size()))
{
wallscan(x1, x2, uwal, dwal, swal, lwal, yrepeat);
}
else
{
wallscan_striped(x1, x2, uwal, dwal, swal, lwal, yrepeat);
}
}
}
//=============================================================================
//
// wallscan_np2
//
// This is a wrapper around wallscan that helps it tile textures whose heights
// are not powers of 2. It divides the wall into texture-sized strips and calls
// wallscan for each of those. Since only one repetition of the texture fits
// in each strip, wallscan will not tile.
//
//=============================================================================
void wallscan_np2(int x1, int x2, short *uwal, short *dwal, float *swal, fixed_t *lwal, double yrepeat, double top, double bot, bool mask)
{
short most1[MAXWIDTH], most2[MAXWIDTH], most3[MAXWIDTH];
short *up, *down;
double texheight = rw_pic->GetHeight();
double partition;
double scaledtexheight = texheight / yrepeat;
if (yrepeat >= 0)
{ // normal orientation: draw strips from top to bottom
partition = top - fmod(top - dc_texturemid / yrepeat - ViewPos.Z, scaledtexheight);
if (partition == top)
{
partition -= scaledtexheight;
}
up = uwal;
down = most1;
dc_texturemid = (partition - ViewPos.Z) * yrepeat + texheight;
while (partition > bot)
{
int j = OWallMost(most3, partition - ViewPos.Z, &WallC);
if (j != 3)
{
for (int j = x1; j < x2; ++j)
{
down[j] = clamp(most3[j], up[j], dwal[j]);
}
call_wallscan(x1, x2, up, down, swal, lwal, yrepeat, mask);
up = down;
down = (down == most1) ? most2 : most1;
}
partition -= scaledtexheight;
dc_texturemid -= texheight;
}
call_wallscan(x1, x2, up, dwal, swal, lwal, yrepeat, mask);
}
else
{ // upside down: draw strips from bottom to top
partition = bot - fmod(bot - dc_texturemid / yrepeat - ViewPos.Z, scaledtexheight);
up = most1;
down = dwal;
dc_texturemid = (partition - ViewPos.Z) * yrepeat + texheight;
while (partition < top)
{
int j = OWallMost(most3, partition - ViewPos.Z, &WallC);
if (j != 12)
{
for (int j = x1; j < x2; ++j)
{
up[j] = clamp(most3[j], uwal[j], down[j]);
}
call_wallscan(x1, x2, up, down, swal, lwal, yrepeat, mask);
down = up;
up = (up == most1) ? most2 : most1;
}
partition -= scaledtexheight;
dc_texturemid -= texheight;
}
call_wallscan(x1, x2, uwal, down, swal, lwal, yrepeat, mask);
}
}
void wallscan_np2_ds(drawseg_t *ds, int x1, int x2, short *uwal, short *dwal, float *swal, fixed_t *lwal, double yrepeat)
{
if (rw_pic->GetHeight() != 1 << rw_pic->HeightBits)
{
double frontcz1 = ds->curline->frontsector->ceilingplane.ZatPoint(ds->curline->v1);
double frontfz1 = ds->curline->frontsector->floorplane.ZatPoint(ds->curline->v1);
double frontcz2 = ds->curline->frontsector->ceilingplane.ZatPoint(ds->curline->v2);
double frontfz2 = ds->curline->frontsector->floorplane.ZatPoint(ds->curline->v2);
double top = MAX(frontcz1, frontcz2);
double bot = MIN(frontfz1, frontfz2);
if (fake3D & FAKE3D_CLIPTOP)
{
top = MIN(top, sclipTop);
}
if (fake3D & FAKE3D_CLIPBOTTOM)
{
bot = MAX(bot, sclipBottom);
}
wallscan_np2(x1, x2, uwal, dwal, swal, lwal, yrepeat, top, bot, true);
}
else
{
call_wallscan(x1, x2, uwal, dwal, swal, lwal, yrepeat, true);
}
}
}