diff options
Diffstat (limited to 'nx-X11/programs/Xserver/render/renderedge.c.X.original')
| -rw-r--r-- | nx-X11/programs/Xserver/render/renderedge.c.X.original | 201 |
1 files changed, 0 insertions, 201 deletions
diff --git a/nx-X11/programs/Xserver/render/renderedge.c.X.original b/nx-X11/programs/Xserver/render/renderedge.c.X.original deleted file mode 100644 index b4031944d..000000000 --- a/nx-X11/programs/Xserver/render/renderedge.c.X.original +++ /dev/null @@ -1,201 +0,0 @@ -/* - * $Id: renderedge.c,v 1.4 2005/07/03 07:02:08 daniels Exp $ - * - * Copyright © 2004 Keith Packard - * - * Permission to use, copy, modify, distribute, and sell this software and its - * documentation for any purpose is hereby granted without fee, provided that - * the above copyright notice appear in all copies and that both that - * copyright notice and this permission notice appear in supporting - * documentation, and that the name of Keith Packard not be used in - * advertising or publicity pertaining to distribution of the software without - * specific, written prior permission. Keith Packard makes no - * representations about the suitability of this software for any purpose. It - * is provided "as is" without express or implied warranty. - * - * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, - * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO - * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR - * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, - * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER - * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR - * PERFORMANCE OF THIS SOFTWARE. - */ - -#ifdef HAVE_DIX_CONFIG_H -#include <dix-config.h> -#endif - -#include "renderedge.h" - -/* - * Compute the smallest value no less than y which is on a - * grid row - */ - -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); -} - -#define _div(a,b) ((a) >= 0 ? (a) / (b) : -((-(a) + (b) - 1) / (b))) - -/* - * Compute the largest value no greater than y which is on a - * grid row - */ -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); -} - -/* - * Step an edge by any amount (including negative values) - */ -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; -} - -/* - * Initialize one edge structure given the line endpoints and a - * starting y value - */ -void -RenderEdgeInit (RenderEdge *e, - int n, - xFixed y_start, - xFixed x_top, - xFixed y_top, - 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; - 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); -} - -/* - * Initialize one edge structure given a line, starting y value - * and a pixel offset for the line - */ -void -RenderLineFixedEdgeInit (RenderEdge *e, - int n, - xFixed y, - xLineFixed *line, - 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); -} - |