/* 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 #include #include #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" 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); } 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 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); } } void make_testpat (void) { ArtVpath *vpath, *vpath2; 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; #ifdef TEST_AFFINE test_affine (); exit (0); #endif vpath = randstar (50); svp = art_svp_from_vpath (vpath); vpath2 = randstar (50); svp2 = art_svp_vpath_stroke (vpath2, ART_PATH_STROKE_JOIN_MITER, ART_PATH_STROKE_CAP_BUTT, 15, 4, 0.5); svp3 = art_svp_intersect (svp, svp2); /* print_svp (svp2); */ 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; alphagamma = art_alphagamma_new (1.8); alphagamma = NULL; #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 fwrite (buf, 1, 512 * 512 * BYTES_PP, stdout); } 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); } void usage (void) { fprintf (stderr, "usage: testart \n" " where is one of:\n" " testpat -- make random star + gradients test pattern\n" " dist -- distance test\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], "dist")) test_dist (); else usage (); return 0; }