Port renderedge.c to pixman

1 files changed, 5 insertions, 114 deletions

diff --git a/render/renderedge.c b/render/renderedge.c
index c2ffabe03..e92174f90 100644
--- a/render/renderedge.c
+++ b/render/renderedge.c
@@ -36,16 +36,7 @@
 _X_EXPORT xFixed
 RenderSampleCeilY (xFixed y, int n)
 {
-    xFixed   f = xFixedFrac(y);
-    xFixed   i = xFixedFloor(y);
-    
-    f = ((f + Y_FRAC_FIRST(n)) / STEP_Y_SMALL(n)) * STEP_Y_SMALL(n) + Y_FRAC_FIRST(n);
-    if (f > Y_FRAC_LAST(n))
-    {
-	f = Y_FRAC_FIRST(n);
-	i += xFixed1;
-    }
-    return (i | f);
+    return pixman_sample_ceil_y (y, n);
 }
 
 #define _div(a,b)    ((a) >= 0 ? (a) / (b) : -((-(a) + (b) - 1) / (b)))
@@ -57,16 +48,7 @@ RenderSampleCeilY (xFixed y, int n)
 _X_EXPORT xFixed
 RenderSampleFloorY (xFixed y, int n)
 {
-    xFixed   f = xFixedFrac(y);
-    xFixed   i = xFixedFloor (y);
-    
-    f = _div(f - Y_FRAC_FIRST(n), STEP_Y_SMALL(n)) * STEP_Y_SMALL(n) + Y_FRAC_FIRST(n);
-    if (f < Y_FRAC_FIRST(n))
-    {
-	f = Y_FRAC_LAST(n);
-	i -= xFixed1;
-    }
-    return (i | f);
+    return pixman_sample_floor_y (y, n);
 }
 
 /*
@@ -75,52 +57,7 @@ RenderSampleFloorY (xFixed y, int n)
 _X_EXPORT void
 RenderEdgeStep (RenderEdge *e, int n)
 {
-    xFixed_48_16	ne;
-
-    e->x += n * e->stepx;
-    
-    ne = e->e + n * (xFixed_48_16) e->dx;
-    
-    if (n >= 0)
-    {
-	if (ne > 0)
-	{
-	    int nx = (ne + e->dy - 1) / e->dy;
-	    e->e = ne - nx * (xFixed_48_16) e->dy;
-	    e->x += nx * e->signdx;
-	}
-    }
-    else
-    {
-	if (ne <= -e->dy)
-	{
-	    int nx = (-ne) / e->dy;
-	    e->e = ne + nx * (xFixed_48_16) e->dy;
-	    e->x -= nx * e->signdx;
-	}
-    }
-}
-
-/*
- * A private routine to initialize the multi-step
- * elements of an edge structure
- */
-static void
-_RenderEdgeMultiInit (RenderEdge *e, int n, xFixed *stepx_p, xFixed *dx_p)
-{
-    xFixed	stepx;
-    xFixed_48_16	ne;
-    
-    ne = n * (xFixed_48_16) e->dx;
-    stepx = n * e->stepx;
-    if (ne > 0)
-    {
-	int nx = ne / e->dy;
-	ne -= nx * e->dy;
-	stepx += nx * e->signdx;
-    }
-    *dx_p = ne;
-    *stepx_p = stepx;
+    pixman_edge_step (e, n);
 }
 
 /*
@@ -136,35 +73,7 @@ RenderEdgeInit (RenderEdge	*e,
 		xFixed		x_bot,
 		xFixed		y_bot)
 {
-    xFixed	dx, dy;
-
-    e->x = x_top;
-    e->e = 0;
-    dx = x_bot - x_top;
-    dy = y_bot - y_top;
-    e->dy = dy;
-    e->dx = 0;
-    if (dy)
-    {
-	if (dx >= 0)
-	{
-	    e->signdx = 1;
-	    e->stepx = dx / dy;
-	    e->dx = dx % dy;
-	    e->e = -dy;
-	}
-	else
-	{
-	    e->signdx = -1;
-	    e->stepx = -(-dx / dy);
-	    e->dx = -dx % dy;
-	    e->e = 0;
-	}
-    
-	_RenderEdgeMultiInit (e, STEP_Y_SMALL(n), &e->stepx_small, &e->dx_small);
-	_RenderEdgeMultiInit (e, STEP_Y_BIG(n), &e->stepx_big, &e->dx_big);
-    }
-    RenderEdgeStep (e, y_start - y_top);
+    pixman_edge_init (e, n, y_start, x_top, y_top, x_bot, y_bot);
 }
 
 /*
@@ -179,24 +88,6 @@ RenderLineFixedEdgeInit (RenderEdge *e,
 			 int	    x_off,
 			 int	    y_off)
 {
-    xFixed	x_off_fixed = IntToxFixed(x_off);
-    xFixed	y_off_fixed = IntToxFixed(y_off);
-    xPointFixed	*top, *bot;
-
-    if (line->p1.y <= line->p2.y)
-    {
-	top = &line->p1;
-	bot = &line->p2;
-    }
-    else
-    {
-	top = &line->p2;
-	bot = &line->p1;
-    }
-    RenderEdgeInit (e, n, y,
-		    top->x + x_off_fixed,
-		    top->y + y_off_fixed,
-		    bot->x + x_off_fixed,
-		    bot->y + y_off_fixed);
+    pixman_line_fixed_edge_init (e, n, y, (pixman_line_fixed_t *)line, x_off, y_off);
 }