- Set colormap light info using R_SetColorMapLight and R_SetDSColorMapLight rather than manually calculating it

- Move texture and span management into R_DrawMaskedColumn

src/r_draw.cpp

@@ -548,6 +548,11 @@ namespace swrenderer
 		dc_colormap = base_colormap + (GETPALOOKUP(light, shade) << COLORMAPSHIFT);
 	}
 
+	void R_SetColorMapLight(FDynamicColormap *base_colormap, float light, int shade)
+	{
+		R_SetColorMapLight(base_colormap->Maps, light, shade);
+	}
+
 	void R_SetDSColorMapLight(lighttable_t *base_colormap, float light, int shade)
 	{
 		using namespace drawerargs;
@@ -555,6 +560,11 @@ namespace swrenderer
 		ds_colormap = base_colormap + (GETPALOOKUP(light, shade) << COLORMAPSHIFT);
 	}
 
+	void R_SetDSColorMapLight(FDynamicColormap *base_colormap, float light, int shade)
+	{
+		R_SetDSColorMapLight(base_colormap->Maps, light, shade);
+	}
+
 	void R_SetTranslationMap(lighttable_t *translation)
 	{
 		using namespace drawerargs;

src/r_draw.h

@@ -192,7 +192,9 @@ namespace swrenderer
 	void R_DrawDoubleSkyCol4(uint32_t solid_top, uint32_t solid_bottom);
 
 	void R_SetColorMapLight(lighttable_t *base_colormap, float light, int shade);
+	void R_SetColorMapLight(FDynamicColormap *base_colormap, float light, int shade);
 	void R_SetDSColorMapLight(lighttable_t *base_colormap, float light, int shade);
+	void R_SetDSColorMapLight(FDynamicColormap *base_colormap, float light, int shade);
 	void R_SetTranslationMap(lighttable_t *translation);
 
 	void R_SetupSpanBits(FTexture *tex);

src/r_main.h

@@ -85,6 +85,9 @@ extern bool				r_dontmaplines;
 // Change R_CalcTiltedLighting() when this changes.
 #define GETPALOOKUP(vis,shade)	(clamp<int> (((shade)-FLOAT2FIXED(MIN(MAXLIGHTVIS,double(vis))))>>FRACBITS, 0, NUMCOLORMAPS-1))
 
+// Converts fixedlightlev into a shade value
+#define FIXEDLIGHT2SHADE(lightlev) (((lightlev) >> COLORMAPSHIFT) << FRACBITS)
+
 extern double			GlobVis;
 
 void R_SetVisibility(double visibility);

src/r_plane.cpp

@@ -240,8 +240,7 @@ void R_MapPlane (int y, int x1)
 	if (plane_shade)
 	{
 		// Determine lighting based on the span's distance from the viewer.
-		ds_colormap = basecolormap->Maps + (GETPALOOKUP (
+		R_SetDSColorMapLight(basecolormap, GlobVis * fabs(CenterY - y), planeshade);
-			GlobVis * fabs(CenterY - y), planeshade) << COLORMAPSHIFT);
 	}
 
 	ds_y = y;
@@ -1043,7 +1042,7 @@ void R_DrawSinglePlane (visplane_t *pl, fixed_t alpha, bool additive, bool maske
 		R_SetupSpanBits(tex);
 		double xscale = pl->xform.xScale * tex->Scale.X;
 		double yscale = pl->xform.yScale * tex->Scale.Y;
-		ds_source = tex->GetPixels ();
+		R_SetSpanSource(tex);
 
 		basecolormap = pl->colormap;
 		planeshade = LIGHT2SHADE(pl->lightlevel);
@@ -1405,12 +1404,13 @@ void R_DrawSkyPlane (visplane_t *pl)
 	bool fakefixed = false;
 	if (fixedcolormap)
 	{
-		dc_colormap = fixedcolormap;
+		R_SetColorMapLight(fixedcolormap, 0, 0);
 	}
 	else
 	{
 		fakefixed = true;
-		fixedcolormap = dc_colormap = NormalLight.Maps;
+		fixedcolormap = NormalLight.Maps;
+		R_SetColorMapLight(fixedcolormap, 0, 0);
 	}
 
 	R_DrawSky (pl);
@@ -1484,12 +1484,21 @@ void R_DrawNormalPlane (visplane_t *pl, double _xscale, double _yscale, fixed_t
 	planeheight = fabs(pl->height.Zat0() - ViewPos.Z);
 
 	GlobVis = r_FloorVisibility / planeheight;
+	ds_light = 0;
 	if (fixedlightlev >= 0)
-		ds_colormap = basecolormap->Maps + fixedlightlev, plane_shade = false;
+	{
+		R_SetDSColorMapLight(basecolormap, 0, FIXEDLIGHT2SHADE(fixedlightlev));
+		plane_shade = false;
+	}
 	else if (fixedcolormap)
-		ds_colormap = fixedcolormap, plane_shade = false;
+	{
+		R_SetDSColorMapLight(fixedcolormap, 0, 0);
+		plane_shade = false;
+	}
 	else
+	{
 		plane_shade = true;
+	}
 
 	if (spanfunc != R_FillSpan)
 	{
@@ -1645,11 +1654,20 @@ void R_DrawTiltedPlane (visplane_t *pl, double _xscale, double _yscale, fixed_t
 		planelightfloat = -planelightfloat;
 
 	if (fixedlightlev >= 0)
-		ds_colormap = basecolormap->Maps + fixedlightlev, plane_shade = false;
+	{
+		R_SetDSColorMapLight(basecolormap, 0, FIXEDLIGHT2SHADE(fixedlightlev));
+		plane_shade = false;
+	}
 	else if (fixedcolormap)
-		ds_colormap = fixedcolormap, plane_shade = false;
+	{
+		R_SetDSColorMapLight(fixedcolormap, 0, 0);
+		plane_shade = false;
+	}
 	else
-		ds_colormap = basecolormap->Maps, plane_shade = true;
+	{
+		R_SetDSColorMapLight(basecolormap, 0, 0);
+		plane_shade = true;
+	}
 
 	// Hack in support for 1 x Z and Z x 1 texture sizes
 	if (ds_ybits == 0)

src/r_segs.cpp

@@ -44,6 +44,7 @@
 #include "r_plane.h"
 #include "r_segs.h"
 #include "r_3dfloors.h"
+#include "r_draw.h"
 #include "v_palette.h"
 #include "r_data/colormaps.h"
 
@@ -53,6 +54,7 @@
 CVAR(Bool, r_fogboundary, true, 0)
 CVAR(Bool, r_drawmirrors, true, 0)
 EXTERN_CVAR(Bool, r_fullbrightignoresectorcolor);
+EXTERN_CVAR(Bool, r_mipmap)
 
 namespace swrenderer       
 {
@@ -156,7 +158,7 @@ static void BlastMaskedColumn (FTexture *tex, bool useRt)
 	// calculate lighting
 	if (fixedcolormap == NULL && fixedlightlev < 0)
 	{
-		dc_colormap = basecolormap->Maps + (GETPALOOKUP (rw_light, wallshade) << COLORMAPSHIFT);
+		R_SetColorMapLight(basecolormap, rw_light, wallshade);
 	}
 
 	dc_iscale = xs_Fix<16>::ToFix(MaskedSWall[dc_x] * MaskedScaleY);
@@ -174,9 +176,7 @@ static void BlastMaskedColumn (FTexture *tex, bool useRt)
 	// when forming multipatched textures (see r_data.c).
 
 	// draw the texture
-	const FTexture::Span *spans;
+	R_DrawMaskedColumn(tex, maskedtexturecol[dc_x], useRt);
-	const BYTE *pixels = tex->GetColumn (maskedtexturecol[dc_x] >> FRACBITS, &spans);
-	R_DrawMaskedColumn(pixels, spans, useRt);
 	rw_light += rw_lightstep;
 	spryscale += rw_scalestep;
 }
@@ -292,9 +292,9 @@ void R_RenderMaskedSegRange (drawseg_t *ds, int x1, int x2)
 	rw_scalestep = ds->iscalestep;
 
 	if (fixedlightlev >= 0)
-		dc_colormap = (r_fullbrightignoresectorcolor) ? (FullNormalLight.Maps + fixedlightlev) : (basecolormap->Maps + fixedlightlev);
+		R_SetColorMapLight((r_fullbrightignoresectorcolor) ? &FullNormalLight : basecolormap, 0, FIXEDLIGHT2SHADE(fixedlightlev));
 	else if (fixedcolormap != NULL)
-		dc_colormap = fixedcolormap;
+		R_SetColorMapLight(fixedcolormap, 0, 0);
 
 	// find positioning
 	texheight = tex->GetScaledHeightDouble();
@@ -440,7 +440,7 @@ void R_RenderMaskedSegRange (drawseg_t *ds, int x1, int x2)
 
 			while (dc_x < stop)
 			{
-				rt_initcols();
+				rt_initcols(nullptr);
 				BlastMaskedColumn (tex, true); dc_x++;
 				BlastMaskedColumn (tex, true); dc_x++;
 				BlastMaskedColumn (tex, true); dc_x++;
@@ -609,9 +609,9 @@ void R_RenderFakeWall(drawseg_t *ds, int x1, int x2, F3DFloor *rover)
 	}
 
 	if (fixedlightlev >= 0)
-		dc_colormap = (r_fullbrightignoresectorcolor) ? (FullNormalLight.Maps + fixedlightlev) : (basecolormap->Maps + fixedlightlev);
+		R_SetColorMapLight((r_fullbrightignoresectorcolor) ? &FullNormalLight : basecolormap, 0, FIXEDLIGHT2SHADE(fixedlightlev));
 	else if (fixedcolormap != NULL)
-		dc_colormap = fixedcolormap;
+		R_SetColorMapLight(fixedcolormap, 0, 0);
 
 	WallC.sz1 = ds->sz1;
 	WallC.sz2 = ds->sz2;
@@ -1061,9 +1061,9 @@ void R_RenderSegLoop ()
 	fixed_t xoffset = rw_offset;
 
 	if (fixedlightlev >= 0)
-		dc_colormap = (r_fullbrightignoresectorcolor) ? (FullNormalLight.Maps + fixedlightlev) : (basecolormap->Maps + fixedlightlev);
+		R_SetColorMapLight((r_fullbrightignoresectorcolor) ? &FullNormalLight : basecolormap, 0, FIXEDLIGHT2SHADE(fixedlightlev));
 	else if (fixedcolormap != NULL)
-		dc_colormap = fixedcolormap;
+		R_SetColorMapLight(fixedcolormap, 0, 0);
 
 	// clip wall to the floor and ceiling
 	for (x = x1; x < x2; ++x)
@@ -2304,11 +2304,11 @@ static void R_RenderDecal (side_t *wall, DBaseDecal *decal, drawseg_t *clipper,
 
 	rw_light = rw_lightleft + (x1 - savecoord.sx1) * rw_lightstep;
 	if (fixedlightlev >= 0)
-		dc_colormap = (r_fullbrightignoresectorcolor) ? (FullNormalLight.Maps + fixedlightlev) : (usecolormap->Maps + fixedlightlev);
+		R_SetColorMapLight((r_fullbrightignoresectorcolor) ? &FullNormalLight : usecolormap, 0, FIXEDLIGHT2SHADE(fixedlightlev));
 	else if (fixedcolormap != NULL)
-		dc_colormap = fixedcolormap;
+		R_SetColorMapLight(fixedcolormap, 0, 0);
 	else if (!foggy && (decal->RenderFlags & RF_FULLBRIGHT))
-		dc_colormap = (r_fullbrightignoresectorcolor) ? FullNormalLight.Maps : usecolormap->Maps;
+		R_SetColorMapLight((r_fullbrightignoresectorcolor) ? &FullNormalLight : usecolormap, 0, 0);
 	else
 		calclighting = true;
 
@@ -2359,7 +2359,7 @@ static void R_RenderDecal (side_t *wall, DBaseDecal *decal, drawseg_t *clipper,
 			{
 				if (calclighting)
 				{ // calculate lighting
-					dc_colormap = usecolormap->Maps + (GETPALOOKUP (rw_light, wallshade) << COLORMAPSHIFT);
+					R_SetColorMapLight(usecolormap, rw_light, wallshade);
 				}
 				R_WallSpriteColumn (false);
 				dc_x++;
@@ -2369,9 +2369,9 @@ static void R_RenderDecal (side_t *wall, DBaseDecal *decal, drawseg_t *clipper,
 			{
 				if (calclighting)
 				{ // calculate lighting
-					dc_colormap = usecolormap->Maps + (GETPALOOKUP (rw_light, wallshade) << COLORMAPSHIFT);
+					R_SetColorMapLight(usecolormap, rw_light, wallshade);
 				}
-				rt_initcols();
+				rt_initcols(nullptr);
 				for (int zz = 4; zz; --zz)
 				{
 					R_WallSpriteColumn (true);
@@ -2384,7 +2384,7 @@ static void R_RenderDecal (side_t *wall, DBaseDecal *decal, drawseg_t *clipper,
 			{
 				if (calclighting)
 				{ // calculate lighting
-					dc_colormap = usecolormap->Maps + (GETPALOOKUP (rw_light, wallshade) << COLORMAPSHIFT);
+					R_SetColorMapLight(usecolormap, rw_light, wallshade);
 				}
 				R_WallSpriteColumn (false);
 				dc_x++;

src/r_things.cpp

@@ -256,8 +256,23 @@ double	 		sprtopscreen;
 
 bool			sprflipvert;
 
-void R_DrawMaskedColumn (const BYTE *column, const FTexture::Span *span, bool useRt)
+void R_DrawMaskedColumn (FTexture *tex, fixed_t col, bool useRt, bool unmasked)
 {
+	const FTexture::Span *span;
+	const BYTE *column;
+
+	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;
+	}
+
 	while (span->Length != 0)
 	{
 		const int length = span->Length;
@@ -377,8 +392,6 @@ static inline bool R_ClipSpriteColumnWithPortals(vissprite_t* spr)
 //
 void R_DrawVisSprite (vissprite_t *vis)
 {
-	const BYTE *pixels;
-	const FTexture::Span *spans;
 	fixed_t 		frac;
 	FTexture		*tex;
 	int				x2, stop4;
@@ -392,7 +405,7 @@ void R_DrawVisSprite (vissprite_t *vis)
 	}
 
 	fixed_t centeryfrac = FLOAT2FIXED(CenterY);
-	dc_colormap = vis->Style.colormap;
+	R_SetColorMapLight(vis->Style.colormap, 0.0f, 0);
 
 	mode = R_SetPatchStyle (vis->Style.RenderStyle, vis->Style.Alpha, vis->Translation, vis->FillColor);
 
@@ -400,7 +413,7 @@ void R_DrawVisSprite (vissprite_t *vis)
 	{ // 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.
-		dc_colormap += vis->ColormapNum << COLORMAPSHIFT;
+		R_SetColorMapLight(dc_colormap, 0, vis->ColormapNum << FRACBITS);
 	}
 
 	if (mode != DontDraw)
@@ -445,21 +458,19 @@ void R_DrawVisSprite (vissprite_t *vis)
 		{
 			while ((dc_x < stop4) && (dc_x & 3))
 			{
-				pixels = tex->GetColumn (frac >> FRACBITS, &spans);
 				if (ispsprite || !R_ClipSpriteColumnWithPortals(vis))
-					R_DrawMaskedColumn (pixels, spans, false);
+					R_DrawMaskedColumn (tex, frac, false);
 				dc_x++;
 				frac += xiscale;
 			}
 
 			while (dc_x < stop4)
 			{
-				rt_initcols();
+				rt_initcols(nullptr);
 				for (int zz = 4; zz; --zz)
 				{
-					pixels = tex->GetColumn (frac >> FRACBITS, &spans);
 					if (ispsprite || !R_ClipSpriteColumnWithPortals(vis))
-						R_DrawMaskedColumn (pixels, spans, true);
+						R_DrawMaskedColumn (tex, frac, true);
 					dc_x++;
 					frac += xiscale;
 				}
@@ -468,9 +479,8 @@ void R_DrawVisSprite (vissprite_t *vis)
 
 			while (dc_x < x2)
 			{
-				pixels = tex->GetColumn (frac >> FRACBITS, &spans);
 				if (ispsprite || !R_ClipSpriteColumnWithPortals(vis))
-					R_DrawMaskedColumn (pixels, spans, false);
+					R_DrawMaskedColumn (tex, frac, false);
 				dc_x++;
 				frac += xiscale;
 			}
@@ -522,11 +532,11 @@ void R_DrawWallSprite(vissprite_t *spr)
 	rw_lightstep = float((GlobVis / spr->wallc.sz2 - rw_lightleft) / (spr->wallc.sx2 - spr->wallc.sx1));
 	rw_light = rw_lightleft + (x1 - spr->wallc.sx1) * rw_lightstep;
 	if (fixedlightlev >= 0)
-		dc_colormap = usecolormap->Maps + fixedlightlev;
+		R_SetColorMapLight(usecolormap, 0, FIXEDLIGHT2SHADE(fixedlightlev));
 	else if (fixedcolormap != NULL)
-		dc_colormap = fixedcolormap;
+		R_SetColorMapLight(fixedcolormap, 0, 0);
 	else if (!foggy && (spr->renderflags & RF_FULLBRIGHT))
-		dc_colormap = (r_fullbrightignoresectorcolor) ? FullNormalLight.Maps : usecolormap->Maps;
+		R_SetColorMapLight((r_fullbrightignoresectorcolor) ? &FullNormalLight : usecolormap, 0, 0);
 	else
 		calclighting = true;
 
@@ -577,7 +587,7 @@ void R_DrawWallSprite(vissprite_t *spr)
 		{
 			if (calclighting)
 			{ // calculate lighting
-				dc_colormap = usecolormap->Maps + (GETPALOOKUP (rw_light, shade) << COLORMAPSHIFT);
+				R_SetColorMapLight(usecolormap, rw_light, shade);
 			}
 			if (!R_ClipSpriteColumnWithPortals(spr))
 				R_WallSpriteColumn(false);
@@ -588,9 +598,9 @@ void R_DrawWallSprite(vissprite_t *spr)
 		{
 			if (calclighting)
 			{ // calculate lighting
-				dc_colormap = usecolormap->Maps + (GETPALOOKUP (rw_light, shade) << COLORMAPSHIFT);
+				R_SetColorMapLight(usecolormap, rw_light, shade);
 			}
-			rt_initcols();
+			rt_initcols(nullptr);
 			for (int zz = 4; zz; --zz)
 			{
 				if (!R_ClipSpriteColumnWithPortals(spr))
@@ -604,7 +614,7 @@ void R_DrawWallSprite(vissprite_t *spr)
 		{
 			if (calclighting)
 			{ // calculate lighting
-				dc_colormap = usecolormap->Maps + (GETPALOOKUP (rw_light, shade) << COLORMAPSHIFT);
+				R_SetColorMapLight(usecolormap, rw_light, shade);
 			}
 			if (!R_ClipSpriteColumnWithPortals(spr))
 				R_WallSpriteColumn(false);
@@ -624,11 +634,8 @@ void R_WallSpriteColumn (bool useRt)
 	else
 		sprtopscreen = CenterY - dc_texturemid * spryscale;
 
-	const BYTE *column;
-	const FTexture::Span *spans;
-	column = WallSpriteTile->GetColumn (lwall[dc_x] >> FRACBITS, &spans);
 	dc_texturefrac = 0;
-	R_DrawMaskedColumn(column, spans, useRt);
+	R_DrawMaskedColumn(WallSpriteTile, lwall[dc_x], useRt);
 	rw_light += rw_lightstep;
 }
 
@@ -638,7 +645,7 @@ void R_DrawVisVoxel(vissprite_t *spr, int minslabz, int maxslabz, short *cliptop
 	int flags = 0;
 
 	// Do setup for blending.
-	dc_colormap = spr->Style.colormap;
+	R_SetColorMapLight(spr->Style.colormap, 0.0f, 0);
 	mode = R_SetPatchStyle(spr->Style.RenderStyle, spr->Style.Alpha, spr->Translation, spr->FillColor);
 
 	if (mode == DontDraw)
@@ -689,10 +696,7 @@ void R_DrawVisVoxel(vissprite_t *spr, int minslabz, int maxslabz, short *cliptop
 				}
 				else
 				{
-					unsigned int **tspan = &dc_ctspan[x & 3];
+					rt_span_coverage(x, span->Start, span->Stop - 1);
-					(*tspan)[0] = span->Start;
-					(*tspan)[1] = span->Stop - 1;
-					*tspan += 2;
 				}
 			}
 			if (!(flags & DVF_SPANSONLY) && (x & 3) == 3)
@@ -3237,12 +3241,12 @@ void R_CheckOffscreenBuffer(int width, int height, bool spansonly)
 	{
 		if (OffscreenColorBuffer == NULL)
 		{
-			OffscreenColorBuffer = new BYTE[width * height];
+			OffscreenColorBuffer = new BYTE[width * height * 4];
 		}
 		else if (OffscreenBufferWidth != width || OffscreenBufferHeight != height)
 		{
 			delete[] OffscreenColorBuffer;
-			OffscreenColorBuffer = new BYTE[width * height];
+			OffscreenColorBuffer = new BYTE[width * height * 4];
 		}
 	}
 	OffscreenBufferWidth = width;

src/r_things.h

@@ -128,7 +128,7 @@ extern double			pspriteyscale;
 extern FTexture			*WallSpriteTile;
 
 
-void R_DrawMaskedColumn (const BYTE *column, const FTexture::Span *spans, bool useRt);
+void R_DrawMaskedColumn (FTexture *texture, fixed_t column, bool useRt, bool unmasked = false);
 void R_WallSpriteColumn (bool useRt);
 
 void R_CacheSprite (spritedef_t *sprite);

src/v_draw.cpp

@@ -135,20 +135,9 @@ void DCanvas::DrawTextureParms(FTexture *img, DrawParms &parms)
 	using namespace swrenderer;
 	using namespace drawerargs;
 
-	FTexture::Span unmaskedSpan[2];
-	const FTexture::Span **spanptr, *spans;
 	static short bottomclipper[MAXWIDTH], topclipper[MAXWIDTH];
 	const BYTE *translation = NULL;
 
-	if (parms.masked)
-	{
-		spanptr = &spans;
-	}
-	else
-	{
-		spanptr = NULL;
-	}
-
 	if (APART(parms.colorOverlay) != 0)
 	{
 		// The software renderer cannot invert the source without inverting the overlay
@@ -198,18 +187,8 @@ void DCanvas::DrawTextureParms(FTexture *img, DrawParms &parms)
 
 	if (mode != DontDraw)
 	{
-		const BYTE *pixels;
 		int stop4;
 
-		if (spanptr == NULL)
-		{ // Create a single span for forced unmasked images
-			spans = unmaskedSpan;
-			unmaskedSpan[0].TopOffset = 0;
-			unmaskedSpan[0].Length = img->GetHeight();
-			unmaskedSpan[1].TopOffset = 0;
-			unmaskedSpan[1].Length = 0;
-		}
-
 		double centeryback = CenterY;
 		CenterY = 0;
 
@@ -301,8 +280,7 @@ void DCanvas::DrawTextureParms(FTexture *img, DrawParms &parms)
 		{
 			while ((dc_x < stop4) && (dc_x & 3))
 			{
-				pixels = img->GetColumn(frac >> FRACBITS, spanptr);
+				R_DrawMaskedColumn(img, frac, false, !parms.masked);
-				R_DrawMaskedColumn(pixels, spans, false);
 				dc_x++;
 				frac += xiscale_i;
 			}
@@ -312,8 +290,7 @@ void DCanvas::DrawTextureParms(FTexture *img, DrawParms &parms)
 				rt_initcols();
 				for (int zz = 4; zz; --zz)
 				{
-					pixels = img->GetColumn(frac >> FRACBITS, spanptr);
+					R_DrawMaskedColumn(img, frac, true, !parms.masked);
-					R_DrawMaskedColumn(pixels, spans, true);
 					dc_x++;
 					frac += xiscale_i;
 				}
@@ -322,8 +299,7 @@ void DCanvas::DrawTextureParms(FTexture *img, DrawParms &parms)
 
 			while (dc_x < x2_i)
 			{
-				pixels = img->GetColumn(frac >> FRACBITS, spanptr);
+				R_DrawMaskedColumn(img, frac, false, !parms.masked);
-				R_DrawMaskedColumn(pixels, spans, false);
 				dc_x++;
 				frac += xiscale_i;
 			}