cinelerra-5.1/guicast/pngtoraw.c

   1
   2 /*
   3  * CINELERRA
   4  * Copyright (C) 2008 Adam Williams <broadcast at earthling dot net>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21
  22
  23
  24 // This program converts compressed PNG to uncompressed RAW for faster
  25 // theme loading.
  26
  27 #include <png.h>
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include <string.h>
  31 #include <stdint.h>
  32
  33 int main(int argc, char *argv[])
  34 {
  35         if(argc < 2) return 1;
  36
  37         for(argc--; argc > 0; argc--)
  38         {
  39                 FILE *in;
  40                 FILE *out;
  41                 int w;
  42                 int h;
  43                 int components;
  44                 int i;
  45                 char variable[1024], header_fn[1024], output_fn[1024], *suffix, *prefix;
  46
  47                 in = fopen(argv[argc], "rb");
  48                 if(!in) continue;
  49
  50 // Replace .png with .raw
  51                 strcpy(output_fn, argv[argc]);
  52                 suffix = strrchr(output_fn, '.');
  53                 if(suffix) *suffix = 0;
  54                 strcat(output_fn, ".raw");
  55
  56                 out = fopen(output_fn, "w");
  57                 if(!out)
  58                 {
  59                         fclose(in);
  60                         continue;
  61                 }
  62
  63
  64 // Decompress input
  65                 png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, 0, 0);
  66                 png_infop info_ptr = png_create_info_struct(png_ptr);
  67                 int new_color_model;
  68
  69                 png_init_io(png_ptr, in);
  70                 png_read_info(png_ptr, info_ptr);
  71
  72                 w = png_get_image_width(png_ptr, info_ptr);
  73                 h = png_get_image_height(png_ptr, info_ptr);
  74
  75                 int src_color_model = png_get_color_type(png_ptr, info_ptr);
  76                 switch(src_color_model)
  77                 {
  78                         case PNG_COLOR_TYPE_RGB:
  79                                 components = 3;
  80                                 break;
  81
  82                         case PNG_COLOR_TYPE_GRAY_ALPHA:
  83                                 printf("pngtoraw %d: %s is alpha\n", __LINE__, argv[argc]);
  84                                 break;
  85
  86
  87                         case PNG_COLOR_TYPE_RGB_ALPHA:
  88                         default:
  89                                 components = 4;
  90                                 break;
  91                 }
  92
  93                 unsigned char *buffer = (unsigned char*)malloc(w * h * components);
  94                 unsigned char **rows = (unsigned char**)malloc(sizeof(unsigned char*) * h);
  95                 for(i = 0; i < h; i++)
  96                         rows[i] = buffer + w * components * i;
  97                 png_read_image(png_ptr, rows);
  98                 png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
  99
 100                 fputc('R', out);
 101                 fputc('A', out);
 102                 fputc('W', out);
 103                 fputc(' ', out);
 104
 105                 fputc((w & 0xff), out);
 106                 fputc(((w >> 8) & 0xff), out);
 107                 fputc(((w >> 16) & 0xff), out);
 108                 fputc(((w >> 24) & 0xff), out);
 109
 110
 111                 fputc((h & 0xff), out);
 112                 fputc(((h >> 8) & 0xff), out);
 113                 fputc(((h >> 16) & 0xff), out);
 114                 fputc(((h >> 24) & 0xff), out);
 115
 116                 fputc((components & 0xff), out);
 117                 fputc(((components >> 8) & 0xff), out);
 118                 fputc(((components >> 16) & 0xff), out);
 119                 fputc(((components >> 24) & 0xff), out);
 120
 121                 fwrite(buffer, w * h * components, 1, out);
 122                 free(buffer);
 123
 124                 fclose(out);
 125                 fclose(in);
 126         }
 127 }
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