From 9a36550815c3d874ce62650bf06ee85a3f705f1c Mon Sep 17 00:00:00 2001
From: Tor Andersson <tor@ghostscript.com>
Date: Mon, 29 Nov 2004 16:15:08 +0100
Subject: shift things about a bit

---
 render/scanconv.c | 152 ------------------------------------------------------
 1 file changed, 152 deletions(-)
 delete mode 100644 render/scanconv.c

(limited to 'render/scanconv.c')

diff --git a/render/scanconv.c b/render/scanconv.c
deleted file mode 100644
index 662a4cdb..00000000
--- a/render/scanconv.c
+++ /dev/null
@@ -1,152 +0,0 @@
-#include <fitz.h>
-
-static inline void
-addspan(unsigned char *list, int x0, int x1, int xofs, int hs)
-{
-	int x0pix, x0sub;
-	int x1pix, x1sub;
-
-	if (x0 == x1)
-		return;
-
-	/* x between 0 and width of bbox */
-	x0 -= xofs;
-	x1 -= xofs;
-
-	x0pix = x0 / hs;
-	x0sub = x0 % hs;
-	x1pix = x1 / hs;
-	x1sub = x1 % hs;
-
-	if (x0pix == x1pix)
-	{
-		list[x0pix] += x1sub - x0sub;
-		list[x0pix+1] += x0sub - x1sub;
-	}
-
-	else
-	{
-		list[x0pix] += hs - x0sub;
-		list[x0pix+1] += x0sub;
-		list[x1pix] += x1sub - hs;
-		list[x1pix+1] += -x1sub;
-	}
-}
-
-static inline void
-nonzerowinding(fz_ael *ael, unsigned char *list, int xofs, int hs)
-{
-	int winding = 0;
-	int x = 0;
-	int i;
-	for (i = 0; i < ael->len; i++)
-	{
-		if (!winding && (winding + ael->edges[i]->ydir))
-			x = ael->edges[i]->x;
-		if (winding && !(winding + ael->edges[i]->ydir))
-			addspan(list, x, ael->edges[i]->x, xofs, hs);
-		winding += ael->edges[i]->ydir;
-	}
-}
-
-static inline void
-evenodd(fz_ael *ael, unsigned char *list, int xofs, int hs)
-{
-	int even = 0;
-	int x = 0;
-	int i;
-	for (i = 0; i < ael->len; i++)
-	{
-		if (!even)
-			x = ael->edges[i]->x;
-		else
-			addspan(list, x, ael->edges[i]->x, xofs, hs);
-		even = !even;
-	}
-}
-
-static void toalpha(unsigned char *list, int n)
-{
-	int d = 0;
-	while (n--)
-	{
-		d += *list;
-		*list++ = d;
-	}
-}
-
-fz_error *
-fz_scanconvert(fz_gel *gel, fz_ael *ael, int eofill, int y0, int y1,
-	void (*blitfunc)(int,int,int,unsigned char*,void*), void *blitdata)
-{
-	fz_error *error;
-	unsigned char *deltas;
-	int y, e;
-	int yd, yc;
-
-	int xmin = fz_idiv(gel->xmin, gel->hs);
-	int xmax = fz_idiv(gel->xmax, gel->hs) + 1;
-
-	int xofs = xmin * gel->hs;
-	int hs = gel->hs;
-	int vs = gel->vs;
-
-	if (gel->len == 0)
-		return nil;
-
-	deltas = fz_malloc(xmax - xmin + 1);
-	if (!deltas)
-		return fz_outofmem;
-
-	memset(deltas, 0, xmax - xmin + 1);
-
-	e = 0;
-	y = gel->edges[0].y;
-	yc = fz_idiv(y, vs);
-	yd = yc;
-
-	while (ael->len > 0 || e < gel->len)
-	{
-		yc = fz_idiv(y, vs);
-		if (yc != yd) {
-			if (yd >= y0 && yd < y1)
-			{
-				toalpha(deltas, xmax - xmin);
-				blitfunc(yd, xmin, xmax - xmin, deltas, blitdata);
-				memset(deltas, 0, xmax - xmin + 1);
-			}
-		}
-		yd = yc;
-
-		error = fz_insertael(ael, gel, y, &e);
-		if (error) {
-			fz_free(deltas);
-			return error;
-		}
-
-		if (yd >= y0 && yd < y1)
-		{
-			if (eofill)
-				evenodd(ael, deltas, xofs, hs);
-			else
-				nonzerowinding(ael, deltas, xofs, hs);
-		}
-
-		fz_advanceael(ael);
-
-		if (ael->len > 0)
-			y ++;
-		else if (e < gel->len)
-			y = gel->edges[e].y;
-	}
-
-	if (yd >= y0 && yd < y1)
-	{
-		toalpha(deltas, xmax - xmin);
-		blitfunc(yd, xmin, xmax - xmin, deltas, blitdata);
-	}
-
-	fz_free(deltas);
-	return nil;
-}
-
-- 
cgit v1.2.3