src/gdk_imlib/colors.c

   1 #define _GNU_SOURCE
   2 #include "gdk_imlib.h"
   3 #include "gdk_imlib_private.h"
   4
   5 void
   6 g_PaletteAlloc(int num, int *cols)
   7 {
   8    XColor              xcl;
   9    int                 i;
  10    int                 r, g, b;
  11
  12    if (id->palette)
  13       free(id->palette);
  14    id->palette = malloc(sizeof(GdkImlibColor) * num);
  15    if (id->palette_orig)
  16       free(id->palette_orig);
  17    id->palette_orig = malloc(sizeof(GdkImlibColor) * num);
  18    for (i = 0; i < num; i++)
  19      {
  20         r = cols[(i * 3) + 0];
  21         g = cols[(i * 3) + 1];
  22         b = cols[(i * 3) + 2];
  23         xcl.red = (unsigned short)((r << 8) | (r));
  24         xcl.green = (unsigned short)((g << 8) | (g));
  25         xcl.blue = (unsigned short)((b << 8) | (b));
  26         xcl.flags = DoRed | DoGreen | DoBlue;
  27         XAllocColor(id->x.disp, id->x.root_cmap, &xcl);
  28         id->palette[i].r = xcl.red >> 8;
  29         id->palette[i].g = xcl.green >> 8;
  30         id->palette[i].b = xcl.blue >> 8;
  31         id->palette[i].pixel = xcl.pixel;
  32         id->palette_orig[i].r = r;
  33         id->palette_orig[i].g = g;
  34         id->palette_orig[i].b = b;
  35         id->palette_orig[i].pixel = xcl.pixel;
  36      }
  37    id->num_colors = num;
  38 }
  39
  40 gint
  41 gdk_imlib_load_colors(char *file)
  42 {
  43    FILE               *f;
  44    char                s[256];
  45    int                 i;
  46    int                 pal[768];
  47    int                 r, g, b;
  48    int                 rr, gg, bb;
  49
  50    f = fopen(file, "r");
  51    if (!f)
  52      {
  53         fprintf(stderr, "GImLib ERROR: Cannot find palette file %s\n", file);
  54         return 0;
  55      }
  56    i = 0;
  57    while (fgets(s, 256, f))
  58      {
  59         if (s[0] == '0')
  60           {
  61              sscanf(s, "%x %x %x", &r, &g, &b);
  62              if (r < 0)
  63                 r = 0;
  64              if (r > 255)
  65                 r = 255;
  66              if (g < 0)
  67                 g = 0;
  68              if (g > 255)
  69                 g = 255;
  70              if (b < 0)
  71                 b = 0;
  72              if (b > 255)
  73                 b = 255;
  74              pal[i++] = r;
  75              pal[i++] = g;
  76              pal[i++] = b;
  77           }
  78         if (i >= 768)
  79            break;
  80      }
  81    fclose(f);
  82    g_PaletteAlloc((i / 3), pal);
  83    if (id->fast_rgb)
  84       free(id->fast_rgb);
  85    id->fast_rgb = malloc(sizeof(int) * 32 * 32 * 32);
  86
  87    for (r = 0; r < 32; r++)
  88      {
  89         for (g = 0; g < 32; g++)
  90           {
  91              for (b = 0; b < 32; b++)
  92                {
  93                   rr = (r << 3) | (r >> 2);
  94                   gg = (g << 3) | (g >> 2);
  95                   bb = (b << 3) | (b >> 2);
  96                   INDEX_RGB(r, g, b) = gindex_best_color_match(&rr, &gg, &bb);
  97                }
  98           }
  99      }
 100    return 1;
 101 }
 102
 103 void
 104 gdk_imlib_free_colors()
 105 {
 106    int                 i;
 107    unsigned long       pixels[256];
 108
 109    for (i = 0; i < id->num_colors; i++)
 110       pixels[i] = id->palette[i].pixel;
 111    XFreeColors(id->x.disp, id->x.root_cmap, pixels, id->num_colors, 0);
 112    id->num_colors = 0;
 113 }