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636 lines
14 KiB
C
636 lines
14 KiB
C
/* Libart_LGPL - library of basic graphic primitives
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* Copyright (C) 1998, 1999 Raph Levien
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <math.h>
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#include "art_misc.h"
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#include "art_vpath.h"
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#include "art_svp.h"
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#include "art_svp_vpath.h"
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#include "art_gray_svp.h"
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#include "art_rgb_svp.h"
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#include "art_svp_vpath_stroke.h"
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#include "art_svp_ops.h"
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#include "art_affine.h"
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#include "art_rgb_affine.h"
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#include "art_rgb_bitmap_affine.h"
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#include "art_rgb_rgba_affine.h"
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#include "art_alphagamma.h"
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#include "art_svp_point.h"
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#include "art_vpath_dash.h"
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#include "art_render.h"
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#include "art_render_gradient.h"
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#include "art_render_svp.h"
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#include "art_svp_intersect.h"
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#ifdef DEAD_CODE
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static void
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test_affine (void) {
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double src[6];
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double dst[6];
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double src2[6];
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char str[128];
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int i;
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ArtPoint ps, pd, ptmp;
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for (i = 0; i < 6; i++)
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{
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src[i] = (rand () * 2.0 / RAND_MAX) - 1.0;
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src2[i] = (rand () * 2.0 / RAND_MAX) - 1.0;
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}
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#if 0
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src[0] = 0.9999999;
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src[1] = -0.000001;
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src[2] = 0.000001;
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src[3] = 0.9999999;
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src[4] = 0;
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src[5] = 0;
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#if 1
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src[0] = 0.98480775;
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src[1] = -0.17364818;
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src[2] = 0.17364818;
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src[3] = 0.98480775;
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#endif
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src2[0] = 0.98480775;
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src2[1] = -0.17364818;
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src2[2] = 0.17364818;
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src2[3] = 0.98480775;
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#endif
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ps.x = rand() * 100.0 / RAND_MAX;
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ps.y = rand() * 100.0 / RAND_MAX;
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art_affine_point (&pd, &ps, src);
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art_affine_invert (dst, src);
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art_affine_point (&ptmp, &pd, dst);
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art_affine_to_string (str, src);
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printf ("src = %s\n", str);
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art_affine_to_string (str, dst);
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printf ("dst = %s\n", str);
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printf ("point (%g, %g) -> (%g, %g) -> (%g, %g)\n",
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ps.x, ps.y, pd.x, pd.y, ptmp.x, ptmp.y);
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art_affine_point (&ptmp, &ps, src);
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art_affine_point (&pd, &ptmp, src2);
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art_affine_to_string (str, src2);
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printf ("src2 = %s\n", str);
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printf ("point (%g, %g) -> (%g, %g) -> (%g, %g)\n",
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ps.x, ps.y, ptmp.x, ptmp.y, pd.x, pd.y);
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art_affine_multiply (dst, src, src2);
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art_affine_to_string (str, dst);
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printf ("dst = %s\n", str);
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art_affine_point (&pd, &ps, dst);
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printf ("point (%g, %g) -> (%g, %g)\n",
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ps.x, ps.y, pd.x, pd.y);
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}
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#endif
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static ArtVpath *
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randstar (int n)
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{
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ArtVpath *vec;
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int i;
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double r, th;
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vec = art_new (ArtVpath, n + 2);
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for (i = 0; i < n; i++)
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{
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vec[i].code = i ? ART_LINETO : ART_MOVETO;
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r = rand () * (250.0 / RAND_MAX);
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#if 0
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r = r + 0.9 * (250 - r);
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#endif
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th = i * 2 * M_PI / n;
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vec[i].x = 250 + r * cos (th);
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vec[i].y = 250 - r * sin (th);
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}
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vec[i].code = ART_LINETO;
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vec[i].x = vec[0].x;
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vec[i].y = vec[0].y;
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i++;
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vec[i].code = ART_END;
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vec[i].x = 0;
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vec[i].y = 0;
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return vec;
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}
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#define TILE_SIZE 512
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#define NUM_ITERS 1
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#define COLOR
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#ifdef COLOR
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#define BYTES_PP 3
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#else
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#define BYTES_PP 1
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#endif
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#ifndef nDEAD_CODE
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static void
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print_svp (ArtSVP *vp)
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{
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int i, j;
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for (i = 0; i < vp->n_segs; i++)
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{
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printf ("segment %d, dir = %s (%f, %f) - (%f, %f)\n",
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i, vp->segs[i].dir ? "down" : "up",
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vp->segs[i].bbox.x0,
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vp->segs[i].bbox.y0,
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vp->segs[i].bbox.x1,
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vp->segs[i].bbox.y1);
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for (j = 0; j < vp->segs[i].n_points; j++)
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printf (" (%g, %g)\n",
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vp->segs[i].points[j].x,
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vp->segs[i].points[j].y);
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}
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}
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#endif
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static void
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print_vpath (ArtVpath *vpath)
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{
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int i;
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for (i = 0; vpath[i].code != ART_END; i++)
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printf ("%g %g %s\n",
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vpath[i].x, vpath[i].y,
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vpath[i].code == ART_MOVETO_OPEN ? "moveto %open" :
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vpath[i].code == ART_MOVETO ? "moveto" :
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vpath[i].code == ART_LINETO ? "lineto" :
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"?");
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printf ("stroke\n");
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}
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static void
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make_testpat (void)
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{
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ArtVpath *vpath, *vpath2, *vpath3;
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ArtSVP *svp, *svp2;
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ArtSVP *svp3;
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art_u8 buf[512 * 512 * BYTES_PP];
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int i, j;
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int iter;
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art_u8 colorimg[256][256][3];
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art_u8 rgbaimg[256][256][4];
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art_u8 bitimg[16][2];
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int x, y;
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double affine[6];
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double affine2[6];
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double affine3[6];
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ArtAlphaGamma *alphagamma;
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double dash_data[] = { 20 };
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ArtVpathDash dash;
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dash.offset = 0;
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dash.n_dash = 1;
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dash.dash = dash_data;
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#ifdef TEST_AFFINE
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test_affine ();
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exit (0);
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#endif
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vpath = randstar (50);
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svp = art_svp_from_vpath (vpath);
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art_free (vpath);
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vpath2 = randstar (50);
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#if 1
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vpath3 = art_vpath_dash (vpath2, &dash);
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art_free (vpath2);
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svp2 = art_svp_vpath_stroke (vpath3,
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ART_PATH_STROKE_JOIN_MITER,
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ART_PATH_STROKE_CAP_BUTT,
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15,
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4,
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0.5);
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art_free (vpath3);
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#else
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svp2 = art_svp_from_vpath (vpath2);
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#endif
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#if 1
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svp3 = art_svp_intersect (svp, svp2);
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#else
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svp3 = svp2;
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#endif
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#if 0
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print_svp (svp);
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#endif
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for (y = 0; y < 256; y++)
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for (x = 0; x < 256; x++)
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{
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colorimg[y][x][0] = (x + y) >> 1;
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colorimg[y][x][1] = (x + (255 - y)) >> 1;
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colorimg[y][x][2] = ((255 - x) + y) >> 1;
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rgbaimg[y][x][0] = (x + y) >> 1;
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rgbaimg[y][x][1] = (x + (255 - y)) >> 1;
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rgbaimg[y][x][2] = ((255 - x) + y) >> 1;
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rgbaimg[y][x][3] = y;
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}
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for (y = 0; y < 16; y++)
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for (x = 0; x < 2; x++)
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bitimg[y][x] = (x << 4) | y;
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affine[0] = 0.5;
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affine[1] = .2;
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affine[2] = -.2;
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affine[3] = 0.5;
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affine[4] = 64;
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affine[5] = 64;
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affine2[0] = 1;
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affine2[1] = -.2;
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affine2[2] = .2;
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affine2[3] = 1;
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affine2[4] = 128;
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affine2[5] = 128;
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affine3[0] = 5;
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affine3[1] = -.2;
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affine3[2] = .2;
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affine3[3] = 5;
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affine3[4] = 384;
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affine3[5] = 32;
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#if 0
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alphagamma = art_alphagamma_new (1.8);
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#else
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alphagamma = NULL;
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#endif
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#ifdef COLOR
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printf ("P6\n512 512\n255\n");
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#else
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printf ("P5\n512 512\n255\n");
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#endif
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for (iter = 0; iter < NUM_ITERS; iter++)
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for (j = 0; j < 512; j += TILE_SIZE)
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for (i = 0; i < 512; i += TILE_SIZE)
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{
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#ifdef COLOR
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art_rgb_svp_aa (svp, i, j, i + TILE_SIZE, j + TILE_SIZE,
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0xffe0a0, 0x100040,
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buf + (j * 512 + i) * BYTES_PP, 512 * BYTES_PP,
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alphagamma);
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art_rgb_svp_alpha (svp2, i, j, i + TILE_SIZE, j + TILE_SIZE,
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0xff000080,
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buf + (j * 512 + i) * BYTES_PP, 512 * BYTES_PP,
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alphagamma);
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art_rgb_svp_alpha (svp3, i, j, i + TILE_SIZE, j + TILE_SIZE,
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0x00ff0080,
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buf + (j * 512 + i) * BYTES_PP, 512 * BYTES_PP,
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alphagamma);
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art_rgb_affine (buf + (j * 512 + i) * BYTES_PP,
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i, j, i + TILE_SIZE, j + TILE_SIZE, 512 * BYTES_PP,
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(art_u8 *)colorimg, 256, 256, 256 * 3,
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affine,
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ART_FILTER_NEAREST, alphagamma);
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art_rgb_rgba_affine (buf + (j * 512 + i) * BYTES_PP,
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i, j, i + TILE_SIZE, j + TILE_SIZE,
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512 * BYTES_PP,
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(art_u8 *)rgbaimg, 256, 256, 256 * 4,
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affine2,
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ART_FILTER_NEAREST, alphagamma);
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art_rgb_bitmap_affine (buf + (j * 512 + i) * BYTES_PP,
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i, j, i + TILE_SIZE, j + TILE_SIZE,
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512 * BYTES_PP,
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(art_u8 *)bitimg, 16, 16, 2,
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0xffff00ff,
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affine3,
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ART_FILTER_NEAREST, alphagamma);
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#else
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art_gray_svp_aa (svp, i, j, i + TILE_SIZE, j + TILE_SIZE,
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buf + (j * 512 + i) * BYTES_PP, 512 * BYTES_PP);
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#endif
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}
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art_svp_free (svp2);
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art_svp_free (svp3);
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art_svp_free (svp);
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#if 1
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fwrite (buf, 1, 512 * 512 * BYTES_PP, stdout);
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#endif
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}
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static void
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test_dist (void)
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{
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ArtVpath *vpath;
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ArtSVP *svp;
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art_u8 buf[512 * 512 * BYTES_PP];
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int x, y;
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int ix;
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double dist;
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int wind;
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vpath = randstar (20);
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#ifdef NO_STROKE
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svp = art_svp_from_vpath (vpath);
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#else
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svp = art_svp_vpath_stroke (vpath,
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ART_PATH_STROKE_JOIN_MITER,
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ART_PATH_STROKE_CAP_BUTT,
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15,
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4,
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0.5);
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#endif
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art_rgb_svp_aa (svp, 0, 0, 512, 512,
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0xffe0a0, 0x100040,
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buf, 512 * BYTES_PP,
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NULL);
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ix = 0;
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for (y = 0; y < 512; y++)
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{
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for (x = 0; x < 512; x++)
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{
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wind = art_svp_point_wind (svp, x, y);
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buf[ix] = 204 - wind * 51;
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dist = art_svp_point_dist (svp, x, y);
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if (((x | y) & 0x3f) == 0)
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{
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fprintf (stderr, "%d,%d: %f\n", x, y, dist);
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}
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buf[ix + 1] = 255 - dist;
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ix += 3;
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}
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}
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printf ("P6\n512 512\n255\n");
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fwrite (buf, 1, 512 * 512 * BYTES_PP, stdout);
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}
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static void
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test_dash (void)
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{
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ArtVpath *vpath, *vpath2;
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double dash_data[] = { 10, 4, 1, 4};
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ArtVpathDash dash;
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dash.offset = 0;
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dash.n_dash = 3;
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dash.dash = dash_data;
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vpath = randstar (50);
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vpath2 = art_vpath_dash (vpath, &dash);
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printf ("%%!\n");
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print_vpath (vpath2);
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printf ("showpage\n");
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art_free (vpath);
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art_free (vpath2);
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}
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static void
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test_render_gradient (art_u8 *buf)
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{
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ArtGradientLinear gradient;
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ArtGradientStop stops[3] = {
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{ 0.0, { 0x7fff, 0x0000, 0x0000, 0x7fff }},
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{ 0.5, { 0x0000, 0x0000, 0x0000, 0x1000 }},
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{ 1.0, { 0x0000, 0x7fff, 0x0000, 0x7fff }}
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};
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ArtVpath *vpath;
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ArtSVP *svp;
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ArtRender *render;
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gradient.a = 0.003;
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gradient.b = -0.0015;
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gradient.c = 0.1;
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gradient.spread = ART_GRADIENT_PAD;
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gradient.n_stops = sizeof(stops) / sizeof(stops[0]);
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gradient.stops = stops;
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vpath = randstar (50);
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svp = art_svp_from_vpath (vpath);
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render = art_render_new (0, 0, 512, 512, buf, 512 * 3, ART_PF_RGB8,
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ART_ALPHA_NONE, NULL);
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art_render_svp (render, svp);
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art_render_gradient_linear (render, &gradient, ART_FILTER_NEAREST);
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art_render_invoke (render);
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}
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static void
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test_render_rad_gradient (art_u8 *buf)
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{
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ArtGradientRadial gradient;
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ArtGradientStop stops[3] = {
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{ 0.0, { 0xffff, 0x0000, 0x0000, 0xffff }},
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{ 0.5, { 0xe000, 0xe000, 0x0000, 0xe000 }},
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{ 1.0, { 0x0000, 0x0000, 0x0000, 0x0000 }}
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};
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ArtVpath *vpath;
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ArtSVP *svp;
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ArtRender *render;
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gradient.affine[0] = 3.0 / 512;
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gradient.affine[1] = 0;
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gradient.affine[2] = 0;
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gradient.affine[3] = 3.0 / 512;
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gradient.affine[4] = -1.5;
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gradient.affine[5] = -1.5;
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gradient.fx = 0.9;
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gradient.fy = 0.1;
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gradient.n_stops = sizeof(stops) / sizeof(stops[0]);
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gradient.stops = stops;
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vpath = randstar (50);
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svp = art_svp_from_vpath (vpath);
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render = art_render_new (0, 0, 512, 512, buf, 512 * 3, ART_PF_RGB8,
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ART_ALPHA_NONE, NULL);
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art_render_svp (render, svp);
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art_render_gradient_radial (render, &gradient, ART_FILTER_NEAREST);
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art_render_invoke (render);
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}
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static void
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test_gradient (void)
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{
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ArtVpath *vpath;
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ArtSVP *svp;
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art_u8 buf[512 * 512 * 3];
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ArtRender *render;
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ArtPixMaxDepth color[3] = {0x0000, 0x0000, 0x8000 };
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int i;
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const int n_iter = 1;
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vpath = randstar (50);
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svp = art_svp_from_vpath (vpath);
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for (i = 0; i < n_iter; i++)
|
|
{
|
|
#define USE_RENDER
|
|
#ifdef USE_RENDER
|
|
render = art_render_new (0, 0, 512, 512, buf, 512 * 3, ART_PF_RGB8,
|
|
ART_ALPHA_NONE,
|
|
NULL);
|
|
art_render_clear_rgb (render, 0xfff0c0);
|
|
art_render_svp (render, svp);
|
|
art_render_image_solid (render, color);
|
|
art_render_invoke (render);
|
|
#else
|
|
art_rgb_svp_aa (svp, 0, 0, 512, 512, 0xfff0c0, 0x000080,
|
|
buf, 512 * 3, NULL);
|
|
#endif
|
|
}
|
|
|
|
#if 1
|
|
test_render_gradient (buf);
|
|
#endif
|
|
test_render_rad_gradient (buf);
|
|
|
|
printf ("P6\n512 512\n255\n");
|
|
fwrite (buf, 1, 512 * 512 * 3, stdout);
|
|
}
|
|
|
|
static void
|
|
output_svp_ppm (const ArtSVP *svp)
|
|
{
|
|
art_u8 buf[512 * 512 * 3];
|
|
art_rgb_svp_aa (svp, 0, 0, 512, 512, 0xfff0c0, 0x000080,
|
|
buf, 512 * 3, NULL);
|
|
printf ("P6\n512 512\n255\n");
|
|
fwrite (buf, 1, 512 * 512 * 3, stdout);
|
|
}
|
|
|
|
static void
|
|
test_intersect (void)
|
|
{
|
|
ArtVpath vpath[] = {
|
|
|
|
#if 0
|
|
/* two triangles */
|
|
{ ART_MOVETO, 100, 100 },
|
|
{ ART_LINETO, 300, 400 },
|
|
{ ART_LINETO, 400, 200 },
|
|
{ ART_LINETO, 100, 100 },
|
|
{ ART_MOVETO, 110, 110 },
|
|
{ ART_LINETO, 310, 410 },
|
|
{ ART_LINETO, 410, 210 },
|
|
{ ART_LINETO, 110, 110 },
|
|
#endif
|
|
|
|
#if 0
|
|
/* a bowtie */
|
|
{ ART_MOVETO, 100, 100 },
|
|
{ ART_LINETO, 400, 400 },
|
|
{ ART_LINETO, 400, 100 },
|
|
{ ART_LINETO, 100, 400 },
|
|
{ ART_LINETO, 100, 100 },
|
|
#endif
|
|
|
|
#if 1
|
|
/* a square */
|
|
{ ART_MOVETO, 100, 100 },
|
|
{ ART_LINETO, 100, 400 },
|
|
{ ART_LINETO, 400, 400 },
|
|
{ ART_LINETO, 400, 100 },
|
|
{ ART_LINETO, 100, 100 },
|
|
#endif
|
|
|
|
#if 1
|
|
/* another square */
|
|
#define XOFF 10
|
|
#define YOFF 10
|
|
{ ART_MOVETO, 100 + XOFF, 100 + YOFF },
|
|
{ ART_LINETO, 100 + XOFF, 400 + YOFF },
|
|
{ ART_LINETO, 400 + XOFF, 400 + YOFF },
|
|
{ ART_LINETO, 400 + XOFF, 100 + YOFF },
|
|
{ ART_LINETO, 100 + XOFF, 100 + YOFF },
|
|
#endif
|
|
|
|
{ ART_END, 0, 0}
|
|
};
|
|
ArtSVP *svp, *svp2;
|
|
ArtSvpWriter *swr;
|
|
|
|
svp = art_svp_from_vpath (vpath);
|
|
|
|
#define RUN_INTERSECT
|
|
#ifdef RUN_INTERSECT
|
|
swr = art_svp_writer_rewind_new (ART_WIND_RULE_ODDEVEN);
|
|
art_svp_intersector (svp, swr);
|
|
|
|
svp2 = art_svp_writer_rewind_reap (swr);
|
|
#endif
|
|
|
|
#if 0
|
|
output_svp_ppm (svp2);
|
|
#else
|
|
print_svp (svp2);
|
|
#endif
|
|
|
|
art_svp_free (svp);
|
|
|
|
#ifdef RUN_INTERSECT
|
|
art_svp_free (svp2);
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
usage (void)
|
|
{
|
|
fprintf (stderr, "usage: testart <test>\n"
|
|
" where <test> is one of:\n"
|
|
" testpat -- make random star + gradients test pattern\n"
|
|
" gradient -- test pattern for rendered gradients\n"
|
|
" dash -- dash test (output is valid PostScript)\n"
|
|
" dist -- distance test\n"
|
|
" intersect -- softball test for intersector\n");
|
|
exit (1);
|
|
}
|
|
|
|
int
|
|
main (int argc, char **argv)
|
|
{
|
|
if (argc < 2)
|
|
usage ();
|
|
|
|
if (!strcmp (argv[1], "testpat"))
|
|
make_testpat ();
|
|
else if (!strcmp (argv[1], "gradient"))
|
|
test_gradient ();
|
|
else if (!strcmp (argv[1], "dist"))
|
|
test_dist ();
|
|
else if (!strcmp (argv[1], "dash"))
|
|
test_dash ();
|
|
else if (!strcmp (argv[1], "intersect"))
|
|
test_intersect ();
|
|
else
|
|
usage ();
|
|
return 0;
|
|
}
|