tests/filters/common.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 <stdio.h>
  24
  25 #include "common.h"
  26
  27 static void dump_buffer(const char *pattern, int w, int h)
  28 {
  29         int x, y;
  30
  31         for (y = 0; y < h; y++) {
  32                 for (x = 0; x < w; x++)
  33                         printf("%2x ", (uint8_t)pattern[x + y * w]);
  34                 printf("\n");
  35         }
  36 }
  37
  38 void dump_buffers(const char *pattern, const gp_pixmap *c)
  39 {
  40         printf("Expected pattern:\n");
  41         dump_buffer(pattern, c->w, c->h);
  42         printf("Rendered pattern:\n");
  43         dump_buffer((char*)c->pixels, c->w, c->h);
  44         printf("Difference:\n");
  45
  46         unsigned int x, y;
  47
  48         for (y = 0; y < c->h; y++) {
  49                 for (x = 0; x < c->w; x++) {
  50                         unsigned int idx = x + y * c->w;
  51                         char p = ((char*)c->pixels)[idx];
  52
  53                         if (pattern[idx] != p) {
  54                                 /* TODO: we expect background to be 0 */
  55                                 if (p == 0)
  56                                         printf(" x ");
  57                                 else
  58                                         printf(" * ");
  59                         } else {
  60                                 printf("%2x ", (uint8_t)pattern[idx]);
  61                         }
  62
  63                 }
  64
  65                 printf("\n");
  66         }
  67 }
  68
  69 int compare_buffers(const char *pattern, const gp_pixmap *c)
  70 {
  71         gp_size x, y;
  72         int err = 0;
  73
  74         for (x = 0; x < c->w; x++) {
  75                 for (y = 0; y < c->h; y++) {
  76                         unsigned int idx = x + y * c->w;
  77
  78                         if (pattern[idx] != ((char*)c->pixels)[idx])
  79                                 err++;
  80                 }
  81         }
  82
  83         if (err)
  84                 dump_buffers(pattern, c);
  85
  86         return err;
  87 }