tests/gfx/LineAA.c

   1 /*****************************************************************************
   2  * This file is part of gfxprim library.                                     *
   3  *                                                                           *
   4  * Gfxprim is free software; you can redistribute it and/or                  *
   5  * modify it under the terms of the GNU Lesser General Public                *
   6  * License as published by the Free Software Foundation; either              *
   7  * version 2.1 of the License, or (at your option) any later version.        *
   8  *                                                                           *
   9  * Gfxprim is distributed in the hope that it will be useful,                *
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of            *
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU         *
  12  * Lesser General Public License for more details.                           *
  13  *                                                                           *
  14  * You should have received a copy of the GNU Lesser General Public          *
  15  * License along with gfxprim; if not, write to the Free Software            *
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor,                        *
  17  * Boston, MA  02110-1301  USA                                               *
  18  *                                                                           *
  19  * Copyright (C) 2009-2013 Cyril Hrubis <metan@ucw.cz>                       *
  20  *                                                                           *
  21  *****************************************************************************/
  22
  23 #include <string.h>
  24 #include <errno.h>
  25 #include <sys/stat.h>
  26
  27 #include <core/GP_Pixmap.h>
  28 #include <gfx/GP_LineAA.h>
  29
  30 #include "tst_test.h"
  31
  32 #include "common.h"
  33
  34 struct testcase {
  35         /* line description */
  36         GP_Coord x0;
  37         GP_Coord y0;
  38         GP_Coord x1;
  39         GP_Coord y1;
  40
  41         /* expected result */
  42         GP_Size w, h;
  43         const char pixmap[];
  44 };
  45
  46 static int test_line(const struct testcase *t)
  47 {
  48         GP_Pixmap *c;
  49         int err;
  50
  51         c = GP_PixmapAlloc(t->w, t->h, GP_PIXEL_G8);
  52
  53         if (c == NULL) {
  54                 tst_err("Failed to allocate pixmap");
  55                 return TST_UNTESTED;
  56         }
  57
  58         /* zero the pixels buffer */
  59         memset(c->pixels, 0, c->w * c->h);
  60
  61         GP_LineAA(c, t->x0, t->y0, t->x1, t->y1, 0xff);
  62
  63         err = compare_buffers(t->pixmap, c);
  64
  65         if (err)
  66                 return TST_FAILED;
  67
  68         return TST_SUCCESS;
  69 }
  70
  71 static struct testcase testcase_line_1px = {
  72         .x0 = (1<<8) + (1<<7),
  73         .y0 = (1<<8) + (1<<7),
  74         .x1 = (1<<8) + (1<<7),
  75         .y1 = (1<<8) + (1<<7),
  76
  77         .w = 3,
  78         .h = 3,
  79
  80         .pixmap = {
  81                 0x00, 0x00, 0x00,
  82                 0x00, 0xff, 0x00,
  83                 0x00, 0x00, 0x00,
  84         }
  85 };
  86
  87 static struct testcase testcase_line_2px = {
  88         .x0 = (1<<8),
  89         .y0 = (1<<8),
  90         .x1 = (2<<8),
  91         .y1 = (2<<8),
  92
  93         .w = 4,
  94         .h = 4,
  95
  96         .pixmap = {
  97                 0x00, 0x00, 0x00, 0x00,
  98                 0x00, 0x00, 0x00, 0x00,
  99                 0x00, 0x00, 0x00, 0x00,
 100                 0x00, 0x00, 0x00, 0x00,
 101         }
 102 };
 103
 104 static struct testcase testcase_line_2px_h = {
 105         .x0 = (1<<8),
 106         .y0 = (1<<8),
 107         .x1 = (2<<8),
 108         .y1 = (1<<8),
 109
 110         .w = 4,
 111         .h = 4,
 112
 113         .pixmap = {
 114                 0x00, 0x00, 0x00, 0x00,
 115                 0x00, 0x00, 0x00, 0x00,
 116                 0x00, 0x00, 0x00, 0x00,
 117                 0x00, 0x00, 0x00, 0x00,
 118         }
 119 };
 120
 121 static struct testcase testcase_line_2px_v = {
 122         .x0 = (1<<8),
 123         .y0 = (1<<8),
 124         .x1 = (1<<8),
 125         .y1 = (2<<8),
 126
 127         .w = 4,
 128         .h = 4,
 129
 130         .pixmap = {
 131                 0x00, 0x00, 0x00, 0x00,
 132                 0x00, 0x00, 0x00, 0x00,
 133                 0x00, 0x00, 0x00, 0x00,
 134                 0x00, 0x00, 0x00, 0x00,
 135         }
 136 };
 137
 138
 139 const struct tst_suite tst_suite = {
 140         .suite_name = "LineAA Testsuite",
 141         .tests = {
 142                 {.name = "LineAA 1px",
 143                  .tst_fn = test_line,
 144                  .data = &testcase_line_1px},
 145
 146                 {.name = "LineAA 2px",
 147                  .tst_fn = test_line,
 148                  .data = &testcase_line_2px},
 149
 150                 {.name = "LineAA 2px horizontal",
 151                  .tst_fn = test_line,
 152                  .data = &testcase_line_2px_h},
 153
 154                 {.name = "LineAA 2px vertical",
 155                  .tst_fn = test_line,
 156                  .data = &testcase_line_2px_v},
 157
 158                 {.name = NULL}
 159         }
 160 };