sys/arch/powerpc/tools/chrpicon/ppmtochrpicon/ppmtochrpicon.c

   1 /*      $NetBSD: ppmtochrpicon.c,v 1.5 2008/01/23 23:22:02 garbled Exp $        */
   2
   3 /*-
   4  * Copyright (c) 1999 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Lonhyn T. Jasinskyj.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * Usage:
  34  *
  35  * ppmtochrpicon [ppmfile]
  36  *
  37  * This programs reads from either a single file given as an argument
  38  * or from stdin if no args are given. It tries to find a <ICON...>
  39  * tag in the file and read a CHRP style ASCII boot icon. It is not
  40  * overly intelligent at dealing with other confusing stuff in the
  41  * file or weird formatting due to the specialized nature of the input
  42  * files.
  43  *
  44  * It then produces a PPM file on stdout containing the boot icon's image.
  45  */
  46
  47 #include <sys/cdefs.h>
  48 __RCSID("$NetBSD: ppmtochrpicon.c,v 1.5 2008/01/23 23:22:02 garbled Exp $");
  49
  50 #include <stdlib.h>
  51
  52 #include <pbm.h>
  53 #include <ppm.h>
  54
  55 #include "chrpicon.h"
  56
  57 static char *hex_digits = "0123456789ABCDEF";
  58
  59 int
  60 main(int argc, char *argv[])
  61 {
  62     FILE *ifp;
  63     CHRPI_spec_rec img_rec;
  64     CHRPI_spec img = &img_rec;
  65     pixval maxval;
  66     pixel **pixels;
  67
  68     ppm_init(&argc, argv);
  69
  70     if (argc > 2)
  71         pm_usage("[ppmfile]");
  72
  73     /* either use stdin or open a file */
  74     if (argc > 1)
  75         ifp = pm_openr(argv[1]);
  76     else
  77         ifp = stdin;
  78
  79     /* use the img struct to conveniently store some parameters */
  80     pixels = ppm_readppm(ifp, &img->width, &img->height, &maxval);
  81
  82     if (maxval != 255)
  83         pm_error("can only use 8-bit per channel true-color "
  84                  "PPM files (maxval = 255)");
  85
  86     if (img->width != 64 || img->height != 64)
  87         pm_message("CHRP only supports boot icons of "
  88                    "size 64x64, will truncate to fit");
  89
  90     img->width = img->height = 64;
  91
  92     /* the only supported color space is RGB = 3:3:2 */
  93     img->rbits = img->gbits = 3;
  94     img->bbits = 2;
  95
  96     pm_close(ifp);
  97
  98     CHRPI_writeicon(stdout, pixels, img);
  99
 100     return 0;
 101 }
 102
 103 void
 104 CHRPI_writeicon(FILE *fp, pixel **pixels, CHRPI_spec img)
 105 {
 106     CHRPI_putheader(stdout, img);
 107     CHRPI_putbitmap(stdout, pixels, img);
 108     CHRPI_putfooter(stdout, img);
 109 }
 110
 111 void
 112 CHRPI_putheader(FILE *fp, CHRPI_spec img)
 113 {
 114     fprintf(fp, "<icon size=%d,%d color-space=%d,%d,%d>\n<bitmap>\n",
 115             img->height, img->width,
 116             img->rbits, img->gbits, img->bbits);
 117 }
 118
 119 void
 120 CHRPI_putfooter(FILE *fp, CHRPI_spec img)
 121 {
 122     fprintf(fp, "</bitmap>\n</icon>\n");
 123 }
 124
 125
 126 void
 127 CHRPI_putbitmap(FILE *fp, pixel** pixels, CHRPI_spec img)
 128 {
 129     int row, col;
 130     pixel *pP;
 131
 132     for (row = 0; row < img->height; row++) {
 133
 134         pixval r, g, b;
 135         char pixbyte;
 136
 137         pP = pixels[row];
 138
 139         for (col = 0; col < img->width; col++) {
 140
 141             r = PPM_GETR(*pP);
 142             g = PPM_GETG(*pP);
 143             b = PPM_GETB(*pP);
 144
 145             pixbyte = (r & 0xe0)  | ((g >> 3) & 0x1c) | ((b >> 6) & 0x03);
 146
 147             /* write the byte in hex */
 148             fputc(hex_digits[(pixbyte>>4) & 0x0f], fp);
 149             fputc(hex_digits[(pixbyte & 0x0f)], fp);
 150             fputc(' ', fp);
 151             pP++;
 152             if ((col+1)%16 == 0)
 153                 fputc('\n', fp);
 154         }
 155
 156     }
 157 }