test/image/blend-mode.c

   1 /* gcc -Wall `pkg-config --libs --cflags libming glib-2.0` blend-mode.c -o blend-mode && ./blend-mode
   2  */
   3
   4 #include <ming.h>
   5 #include <glib.h>
   6
   7 #define SIZE 240
   8
   9 const char *modes[] = {
  10   "0",
  11   "normal",
  12   "layer",
  13   "multiply",
  14   "screen",
  15   "lighten",
  16   "darken",
  17   "difference",
  18   "add",
  19   "subtract",
  20   "inverse",
  21   "alpha",
  22   "erase",
  23   "overlay",
  24   "hardlight",
  25   "15"
  26 };
  27
  28 SWFBitmap
  29 create_yellow_image (guint w, guint h)
  30 {
  31   guint32 *data;
  32   guint x, y;
  33   SWFBitmap ret;
  34
  35   data = g_malloc (w * h * 4);
  36   for (y = 0; y < h; y++) {
  37     /* get 15 steps of 10 pixel high lines fading in yellow */
  38     guint32 pixel = 255 / 15 * (y * 16 / h);
  39     pixel *= 0x01010100;
  40     for (x = 0; x < w; x++) {
  41       data[y * w + x] = pixel;
  42     }
  43   }
  44   ret = newSWFBitmap_fromData ((guint8 *) data, w, h, TRUE);
  45   g_free (data);
  46   return ret;
  47 }
  48
  49 SWFBitmap
  50 create_teal_image (guint w, guint h)
  51 {
  52   guint32 *data;
  53   guint x, y;
  54   SWFBitmap ret;
  55
  56   data = g_malloc (w * h * 4);
  57   for (y = 0; y < h; y++) {
  58     /* get 15 steps of 10 pixel high lines fading in yellow */
  59     for (x = 0; x < w; x++) {
  60       guint32 pixel = 255 / 15 * (x * 16 / w);
  61       pixel *= 0x01000101;
  62       data[y * w + x] = pixel;
  63     }
  64   }
  65   ret = newSWFBitmap_fromData ((guint8 *) data, w, h, TRUE);
  66   g_free (data);
  67   return ret;
  68 }
  69
  70 static SWFDisplayItem
  71 add_images (SWFMovie movie, int blend_mode)
  72 {
  73   SWFBitmap bitmap;
  74   SWFShape shape;
  75   SWFMovieClip clip;
  76   SWFDisplayItem item;
  77
  78   clip = newSWFMovieClip ();
  79
  80   bitmap = create_yellow_image (SIZE, SIZE);
  81   shape = newSWFShapeFromBitmap (bitmap, SWFFILL_CLIPPED_BITMAP);
  82   item = SWFMovieClip_add (clip, (SWFBlock) shape);
  83   SWFDisplayItem_setDepth (item, 1);
  84
  85   bitmap = create_teal_image (SIZE, SIZE);
  86   shape = newSWFShapeFromBitmap (bitmap, SWFFILL_CLIPPED_BITMAP);
  87   item = SWFMovieClip_add (clip, (SWFBlock) shape);
  88   SWFDisplayItem_setDepth (item, 2);
  89   SWFDisplayItem_setBlendMode (item, blend_mode);
  90
  91   SWFMovieClip_nextFrame (clip);
  92
  93   item = SWFMovie_add (movie, (SWFBlock) clip);
  94   SWFDisplayItem_setBlendMode (item, SWFBLEND_MODE_LAYER);
  95
  96   return item;
  97 }
  98
  99 static void
 100 do_movie (int version)
 101 {
 102   SWFMovie movie;
 103   char *real_name;
 104   int mode;
 105
 106   for (mode = 0; mode < G_N_ELEMENTS (modes); mode++) {
 107     movie = newSWFMovieWithVersion (version);
 108     movie = newSWFMovie();
 109     SWFMovie_setRate (movie, 1);
 110     SWFMovie_setDimension (movie, SIZE, SIZE);
 111     SWFMovie_setBackground (movie, 0, 0, 0);
 112
 113     add_images (movie, mode);
 114     SWFMovie_nextFrame (movie);
 115
 116     real_name = g_strdup_printf ("blend-mode-%s-%d.swf", modes[mode], version);
 117     SWFMovie_save (movie, real_name);
 118     g_free (real_name);
 119   }
 120 }
 121
 122 int
 123 main (int argc, char **argv)
 124 {
 125   int i;
 126
 127   if (Ming_init ())
 128     return 1;
 129
 130   for (i = 7; i < 9; i++)
 131     do_movie (i);
 132
 133   return 0;
 134 }