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+/* Libart_LGPL - library of basic graphic primitives
+ * Copyright (C) 1998, 1999 Raph Levien
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <math.h>
+#include "art_misc.h"
+#include "art_vpath.h"
+#include "art_svp.h"
+#include "art_svp_vpath.h"
+#include "art_gray_svp.h"
+#include "art_rgb_svp.h"
+#include "art_svp_vpath_stroke.h"
+#include "art_svp_ops.h"
+#include "art_affine.h"
+#include "art_rgb_affine.h"
+#include "art_rgb_bitmap_affine.h"
+#include "art_rgb_rgba_affine.h"
+#include "art_alphagamma.h"
+#include "art_svp_point.h"
+#include "art_vpath_dash.h"
+#include "art_render.h"
+#include "art_render_gradient.h"
+#include "art_render_svp.h"
+#include "art_svp_intersect.h"
+
+#ifdef DEAD_CODE
+static void
+test_affine (void) {
+ double src[6];
+ double dst[6];
+ double src2[6];
+ char str[128];
+ int i;
+ ArtPoint ps, pd, ptmp;
+
+ for (i = 0; i < 6; i++)
+ {
+ src[i] = (rand () * 2.0 / RAND_MAX) - 1.0;
+ src2[i] = (rand () * 2.0 / RAND_MAX) - 1.0;
+ }
+#if 0
+ src[0] = 0.9999999;
+ src[1] = -0.000001;
+ src[2] = 0.000001;
+ src[3] = 0.9999999;
+ src[4] = 0;
+ src[5] = 0;
+#if 1
+ src[0] = 0.98480775;
+ src[1] = -0.17364818;
+ src[2] = 0.17364818;
+ src[3] = 0.98480775;
+#endif
+
+ src2[0] = 0.98480775;
+ src2[1] = -0.17364818;
+ src2[2] = 0.17364818;
+ src2[3] = 0.98480775;
+#endif
+
+
+ ps.x = rand() * 100.0 / RAND_MAX;
+ ps.y = rand() * 100.0 / RAND_MAX;
+
+ art_affine_point (&pd, &ps, src);
+ art_affine_invert (dst, src);
+ art_affine_point (&ptmp, &pd, dst);
+ art_affine_to_string (str, src);
+ printf ("src = %s\n", str);
+ art_affine_to_string (str, dst);
+ printf ("dst = %s\n", str);
+ printf ("point (%g, %g) -> (%g, %g) -> (%g, %g)\n",
+ ps.x, ps.y, pd.x, pd.y, ptmp.x, ptmp.y);
+
+ art_affine_point (&ptmp, &ps, src);
+ art_affine_point (&pd, &ptmp, src2);
+ art_affine_to_string (str, src2);
+ printf ("src2 = %s\n", str);
+ printf ("point (%g, %g) -> (%g, %g) -> (%g, %g)\n",
+ ps.x, ps.y, ptmp.x, ptmp.y, pd.x, pd.y);
+ art_affine_multiply (dst, src, src2);
+ art_affine_to_string (str, dst);
+ printf ("dst = %s\n", str);
+ art_affine_point (&pd, &ps, dst);
+ printf ("point (%g, %g) -> (%g, %g)\n",
+ ps.x, ps.y, pd.x, pd.y);
+
+}
+#endif
+
+static ArtVpath *
+randstar (int n)
+{
+ ArtVpath *vec;
+ int i;
+ double r, th;
+
+ vec = art_new (ArtVpath, n + 2);
+ for (i = 0; i < n; i++)
+ {
+ vec[i].code = i ? ART_LINETO : ART_MOVETO;
+ r = rand () * (250.0 / RAND_MAX);
+#if 0
+ r = r + 0.9 * (250 - r);
+#endif
+ th = i * 2 * M_PI / n;
+ vec[i].x = 250 + r * cos (th);
+ vec[i].y = 250 - r * sin (th);
+ }
+ vec[i].code = ART_LINETO;
+ vec[i].x = vec[0].x;
+ vec[i].y = vec[0].y;
+ i++;
+ vec[i].code = ART_END;
+ vec[i].x = 0;
+ vec[i].y = 0;
+ return vec;
+}
+
+#define TILE_SIZE 512
+#define NUM_ITERS 1
+#define COLOR
+
+#ifdef COLOR
+#define BYTES_PP 3
+#else
+#define BYTES_PP 1
+#endif
+
+#ifndef nDEAD_CODE
+static void
+print_svp (ArtSVP *vp)
+{
+ int i, j;
+
+ for (i = 0; i < vp->n_segs; i++)
+ {
+ printf ("segment %d, dir = %s (%f, %f) - (%f, %f)\n",
+ i, vp->segs[i].dir ? "down" : "up",
+ vp->segs[i].bbox.x0,
+ vp->segs[i].bbox.y0,
+ vp->segs[i].bbox.x1,
+ vp->segs[i].bbox.y1);
+ for (j = 0; j < vp->segs[i].n_points; j++)
+ printf (" (%g, %g)\n",
+ vp->segs[i].points[j].x,
+ vp->segs[i].points[j].y);
+ }
+}
+#endif
+
+static void
+print_vpath (ArtVpath *vpath)
+{
+ int i;
+
+ for (i = 0; vpath[i].code != ART_END; i++)
+ printf ("%g %g %s\n",
+ vpath[i].x, vpath[i].y,
+ vpath[i].code == ART_MOVETO_OPEN ? "moveto %open" :
+ vpath[i].code == ART_MOVETO ? "moveto" :
+ vpath[i].code == ART_LINETO ? "lineto" :
+ "?");
+
+ printf ("stroke\n");
+}
+
+static void
+make_testpat (void)
+{
+ ArtVpath *vpath, *vpath2, *vpath3;
+ ArtSVP *svp, *svp2;
+ ArtSVP *svp3;
+ art_u8 buf[512 * 512 * BYTES_PP];
+ int i, j;
+ int iter;
+ art_u8 colorimg[256][256][3];
+ art_u8 rgbaimg[256][256][4];
+ art_u8 bitimg[16][2];
+ int x, y;
+ double affine[6];
+ double affine2[6];
+ double affine3[6];
+ ArtAlphaGamma *alphagamma;
+ double dash_data[] = { 20 };
+ ArtVpathDash dash;
+
+ dash.offset = 0;
+ dash.n_dash = 1;
+ dash.dash = dash_data;
+
+#ifdef TEST_AFFINE
+ test_affine ();
+ exit (0);
+#endif
+
+ vpath = randstar (50);
+ svp = art_svp_from_vpath (vpath);
+ art_free (vpath);
+
+ vpath2 = randstar (50);
+#if 1
+ vpath3 = art_vpath_dash (vpath2, &dash);
+ art_free (vpath2);
+ svp2 = art_svp_vpath_stroke (vpath3,
+ ART_PATH_STROKE_JOIN_MITER,
+ ART_PATH_STROKE_CAP_BUTT,
+ 15,
+ 4,
+ 0.5);
+ art_free (vpath3);
+#else
+ svp2 = art_svp_from_vpath (vpath2);
+#endif
+
+#if 1
+ svp3 = art_svp_intersect (svp, svp2);
+#else
+ svp3 = svp2;
+#endif
+
+#if 0
+ print_svp (svp);
+#endif
+
+ for (y = 0; y < 256; y++)
+ for (x = 0; x < 256; x++)
+ {
+ colorimg[y][x][0] = (x + y) >> 1;
+ colorimg[y][x][1] = (x + (255 - y)) >> 1;
+ colorimg[y][x][2] = ((255 - x) + y) >> 1;
+
+ rgbaimg[y][x][0] = (x + y) >> 1;
+ rgbaimg[y][x][1] = (x + (255 - y)) >> 1;
+ rgbaimg[y][x][2] = ((255 - x) + y) >> 1;
+ rgbaimg[y][x][3] = y;
+ }
+
+ for (y = 0; y < 16; y++)
+ for (x = 0; x < 2; x++)
+ bitimg[y][x] = (x << 4) | y;
+
+ affine[0] = 0.5;
+ affine[1] = .2;
+ affine[2] = -.2;
+ affine[3] = 0.5;
+ affine[4] = 64;
+ affine[5] = 64;
+
+ affine2[0] = 1;
+ affine2[1] = -.2;
+ affine2[2] = .2;
+ affine2[3] = 1;
+ affine2[4] = 128;
+ affine2[5] = 128;
+
+ affine3[0] = 5;
+ affine3[1] = -.2;
+ affine3[2] = .2;
+ affine3[3] = 5;
+ affine3[4] = 384;
+ affine3[5] = 32;
+
+#if 0
+ alphagamma = art_alphagamma_new (1.8);
+#else
+ alphagamma = NULL;
+#endif
+
+#ifdef COLOR
+ printf ("P6\n512 512\n255\n");
+#else
+ printf ("P5\n512 512\n255\n");
+#endif
+ for (iter = 0; iter < NUM_ITERS; iter++)
+ for (j = 0; j < 512; j += TILE_SIZE)
+ for (i = 0; i < 512; i += TILE_SIZE)
+ {
+#ifdef COLOR
+ art_rgb_svp_aa (svp, i, j, i + TILE_SIZE, j + TILE_SIZE,
+ 0xffe0a0, 0x100040,
+ buf + (j * 512 + i) * BYTES_PP, 512 * BYTES_PP,
+ alphagamma);
+ art_rgb_svp_alpha (svp2, i, j, i + TILE_SIZE, j + TILE_SIZE,
+ 0xff000080,
+ buf + (j * 512 + i) * BYTES_PP, 512 * BYTES_PP,
+ alphagamma);
+ art_rgb_svp_alpha (svp3, i, j, i + TILE_SIZE, j + TILE_SIZE,
+ 0x00ff0080,
+ buf + (j * 512 + i) * BYTES_PP, 512 * BYTES_PP,
+ alphagamma);
+ art_rgb_affine (buf + (j * 512 + i) * BYTES_PP,
+ i, j, i + TILE_SIZE, j + TILE_SIZE, 512 * BYTES_PP,
+ (art_u8 *)colorimg, 256, 256, 256 * 3,
+ affine,
+ ART_FILTER_NEAREST, alphagamma);
+ art_rgb_rgba_affine (buf + (j * 512 + i) * BYTES_PP,
+ i, j, i + TILE_SIZE, j + TILE_SIZE,
+ 512 * BYTES_PP,
+ (art_u8 *)rgbaimg, 256, 256, 256 * 4,
+ affine2,
+ ART_FILTER_NEAREST, alphagamma);
+ art_rgb_bitmap_affine (buf + (j * 512 + i) * BYTES_PP,
+ i, j, i + TILE_SIZE, j + TILE_SIZE,
+ 512 * BYTES_PP,
+ (art_u8 *)bitimg, 16, 16, 2,
+ 0xffff00ff,
+ affine3,
+ ART_FILTER_NEAREST, alphagamma);
+#else
+ art_gray_svp_aa (svp, i, j, i + TILE_SIZE, j + TILE_SIZE,
+ buf + (j * 512 + i) * BYTES_PP, 512 * BYTES_PP);
+#endif
+ }
+
+ art_svp_free (svp2);
+ art_svp_free (svp3);
+ art_svp_free (svp);
+
+#if 1
+ fwrite (buf, 1, 512 * 512 * BYTES_PP, stdout);
+#endif
+}
+
+static void
+test_dist (void)
+{
+ ArtVpath *vpath;
+ ArtSVP *svp;
+ art_u8 buf[512 * 512 * BYTES_PP];
+ int x, y;
+ int ix;
+ double dist;
+ int wind;
+
+ vpath = randstar (20);
+#ifdef NO_STROKE
+ svp = art_svp_from_vpath (vpath);
+#else
+ svp = art_svp_vpath_stroke (vpath,
+ ART_PATH_STROKE_JOIN_MITER,
+ ART_PATH_STROKE_CAP_BUTT,
+ 15,
+ 4,
+ 0.5);
+#endif
+
+ art_rgb_svp_aa (svp, 0, 0, 512, 512,
+ 0xffe0a0, 0x100040,
+ buf, 512 * BYTES_PP,
+ NULL);
+
+ ix = 0;
+ for (y = 0; y < 512; y++)
+ {
+ for (x = 0; x < 512; x++)
+ {
+ wind = art_svp_point_wind (svp, x, y);
+ buf[ix] = 204 - wind * 51;
+ dist = art_svp_point_dist (svp, x, y);
+ if (((x | y) & 0x3f) == 0)
+ {
+ fprintf (stderr, "%d,%d: %f\n", x, y, dist);
+ }
+ buf[ix + 1] = 255 - dist;
+ ix += 3;
+ }
+ }
+
+ printf ("P6\n512 512\n255\n");
+ fwrite (buf, 1, 512 * 512 * BYTES_PP, stdout);
+
+}
+
+static void
+test_dash (void)
+{
+ ArtVpath *vpath, *vpath2;
+ double dash_data[] = { 10, 4, 1, 4};
+ ArtVpathDash dash;
+
+ dash.offset = 0;
+ dash.n_dash = 3;
+ dash.dash = dash_data;
+
+ vpath = randstar (50);
+ vpath2 = art_vpath_dash (vpath, &dash);
+ printf ("%%!\n");
+ print_vpath (vpath2);
+ printf ("showpage\n");
+ art_free (vpath);
+ art_free (vpath2);
+}
+
+static void
+test_render_gradient (art_u8 *buf)
+{
+ ArtGradientLinear gradient;
+ ArtGradientStop stops[3] = {
+ { 0.0, { 0x7fff, 0x0000, 0x0000, 0x7fff }},
+ { 0.5, { 0x0000, 0x0000, 0x0000, 0x1000 }},
+ { 1.0, { 0x0000, 0x7fff, 0x0000, 0x7fff }}
+ };
+ ArtVpath *vpath;
+ ArtSVP *svp;
+ ArtRender *render;
+
+ gradient.a = 0.003;
+ gradient.b = -0.0015;
+ gradient.c = 0.1;
+ gradient.spread = ART_GRADIENT_PAD;
+ gradient.n_stops = sizeof(stops) / sizeof(stops[0]);
+ gradient.stops = stops;
+
+ vpath = randstar (50);
+ svp = art_svp_from_vpath (vpath);
+
+ render = art_render_new (0, 0, 512, 512, buf, 512 * 3, 3, 8, ART_ALPHA_NONE,
+ NULL);
+ art_render_svp (render, svp);
+ art_render_gradient_linear (render, &gradient, ART_FILTER_NEAREST);
+ art_render_invoke (render);
+
+}
+
+static void
+test_render_rad_gradient (art_u8 *buf)
+{
+ ArtGradientRadial gradient;
+ ArtGradientStop stops[3] = {
+ { 0.0, { 0xffff, 0x0000, 0x0000, 0xffff }},
+ { 0.5, { 0xe000, 0xe000, 0x0000, 0xe000 }},
+ { 1.0, { 0x0000, 0x0000, 0x0000, 0x0000 }}
+ };
+ ArtVpath *vpath;
+ ArtSVP *svp;
+ ArtRender *render;
+
+ gradient.affine[0] = 3.0 / 512;
+ gradient.affine[1] = 0;
+ gradient.affine[2] = 0;
+ gradient.affine[3] = 3.0 / 512;
+ gradient.affine[4] = -1.5;
+ gradient.affine[5] = -1.5;
+ gradient.fx = 0.9;
+ gradient.fy = 0.1;
+
+ gradient.n_stops = sizeof(stops) / sizeof(stops[0]);
+ gradient.stops = stops;
+
+ vpath = randstar (50);
+ svp = art_svp_from_vpath (vpath);
+
+ render = art_render_new (0, 0, 512, 512, buf, 512 * 3, 3, 8, ART_ALPHA_NONE,
+ NULL);
+ art_render_svp (render, svp);
+ art_render_gradient_radial (render, &gradient, ART_FILTER_NEAREST);
+ art_render_invoke (render);
+
+}
+
+static void
+test_gradient (void)
+{
+ ArtVpath *vpath;
+ ArtSVP *svp;
+ art_u8 buf[512 * 512 * 3];
+ ArtRender *render;
+ ArtPixMaxDepth color[3] = {0x0000, 0x0000, 0x8000 };
+ int i;
+ const int n_iter = 1;
+
+ vpath = randstar (50);
+ svp = art_svp_from_vpath (vpath);
+
+ for (i = 0; i < n_iter; i++)
+ {
+#define USE_RENDER
+#ifdef USE_RENDER
+ render = art_render_new (0, 0, 512, 512, buf, 512 * 3, 3, 8, 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);
+}
+
+#if 0
+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);
+}
+#endif
+
+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;
+}
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