src/apc/fileparser.y

   1 /* Asset Package Compiler */
   2 %{
   3   #include <stdio.h>
   4   #include <string.h>
   5   #include <dirent.h>
   6   #include "sprite.h"
   7   #include "symbol.h"
   8   #include <png.h>
   9
  10
  11   extern void yyerror();
  12   extern int linit();
  13   extern int yylex();
  14
  15
  16   int handle_fname(char *);
  17   int eval_png_file(char*);
  18   int read_png_file(char*);
  19
  20 %}
  21 %define parse.error verbose
  22 %union{
  23   char* str;
  24  }
  25
  26 /* %token <str> EXT */
  27 /* %token <str> FW */
  28 /* %token <str> SPR */
  29 /* %token CC */
  30
  31 /*  /\* Rules *\/ */
  32 /* %% */
  33 /* SS: SPR '/' MD '.' EXT */
  34 /* MD: CC '_' FW */
  35 /* | FW */
  36 /* | CC */
  37
  38
  39 %token <str> FDAT
  40
  41 /* Rules */
  42 %%
  43 FLIST : FLIST FNAME {printf("reducing to flist\n");} /* Now output to asspack.o */  | FNAME
  44 FNAME : FDAT {printf("handle_fname(%s)\n", $1);handle_fname(yylval.str);printf("handled fname\n");}
  45
  46 %%
  47 int
  48 main(int argc, char** argv)
  49 {
  50   /* Parse cmd line arguments */
  51
  52   linit();
  53   yyparse(); /* runs handle_fname for each filename */
  54
  55
  56   return 0;
  57 }
  58 void
  59 yyerror (char const *s)
  60 {
  61   fprintf(stderr, "%s\n", s);
  62 }
  63
  64
  65
  66 /* Analyze file_name for information on sprite sheet,
  67    store sprite sheet and label into sprite then
  68    push sprite onto sprites[]*/
  69 int
  70 handle_fname(char* file_name)
  71 {
  72   /* Parse the file_name for data */
  73
  74
  75   /* Get the specs of the PNG file  */
  76   if(eval_png_file(file_name))
  77   {
  78     printf("Failed in eval_png_file\n");
  79     return 1;
  80   }
  81
  82   /* Insert sprite sheet from PNG into sprite_sheets */
  83   push_sprite();
  84
  85
  86
  87
  88   /* Store dir/filename in label as well as any other data that fits */
  89 }
  90 int eval_png_file(char* file_name)
  91 {
  92   /* Evaluate file_name for metadata */
  93
  94   /* Extracts header info from png_file */
  95   read_png_file(file_name);
  96
  97   /* Create the symbol and put it in symbol_table[]*/
  98
  99   return 0;
 100 }
 101
 102
 103
 104 /* variables for libPNG */
 105 int png_width,png_height;
 106 png_byte bit_depth;
 107 png_byte color_type;
 108 png_structp png_ptr;
 109 png_infop info_ptr;
 110
 111 int
 112 read_png_file( char* file_name)
 113 {
 114   /* Setup PNG file */
 115   char header[8];
 116   int is_png = 0;
 117   char* dir = "pngfiles";
 118
 119   /* TODO: Change this fopen to a real var! */
 120   FILE *fp = fopen("pngfiles/env_street_road03_0.png","rb");
 121
 122   if(!fp)
 123     { printf("Could not read file %s in handle_fname()", file_name);
 124       return 1;
 125     }
 126
 127   fread(header, 1, 8, fp);
 128
 129   is_png = !png_sig_cmp(header, 0, 8);
 130   if(!is_png)
 131     return 1;
 132
 133   png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
 134
 135   if (!png_ptr)
 136     { printf("Failed to allocate png_ptr\n");
 137       return 1;
 138     }
 139   info_ptr = png_create_info_struct(png_ptr);
 140
 141   if (!info_ptr)
 142     { printf("Failed to create info_ptr\n");
 143       png_destroy_read_struct(&png_ptr,(png_infopp)NULL, (png_infopp)NULL);
 144       return 1;
 145     }
 146
 147   png_infop end_info = png_create_info_struct(png_ptr);
 148   if (!end_info)
 149     { printf("Failed to create end_info \n");
 150       png_destroy_read_struct(&png_ptr,(png_infopp)NULL, (png_infopp)NULL);
 151       return 1;
 152     }
 153
 154   if(setjmp(png_jmpbuf(png_ptr)))
 155     { printf("Failed in init_io\n");
 156       png_destroy_read_struct(&png_ptr,(png_infopp)NULL, (png_infopp)NULL);
 157       fclose(fp);
 158       return 1;
 159     }
 160     png_init_io(png_ptr, fp);
 161     png_set_sig_bytes(png_ptr, 8);
 162
 163     png_read_info(png_ptr, info_ptr);
 164
 165     png_width = png_get_image_width(png_ptr, info_ptr);
 166     png_height = png_get_image_height(png_ptr, info_ptr);
 167     color_type = png_get_color_type(png_ptr, info_ptr);
 168     bit_depth = png_get_bit_depth(png_ptr, info_ptr);
 169
 170     png_read_update_info(png_ptr, info_ptr);
 171
 172     printf("successfully read png file %s\n", file_name);
 173
 174     return 0;
 175
 176 }