apps/plugins/grayscale.c

   1 /***************************************************************************
   2 *             __________               __   ___.
   3 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7 *                     \/            \/     \/    \/            \/
   8 * $Id$
   9 *
  10 * Grayscale demo plugin
  11 *
  12 * Copyright (C) 2004 Jens Arnold
  13 *
  14 * All files in this archive are subject to the GNU General Public License.
  15 * See the file COPYING in the source tree root for full license agreement.
  16 *
  17 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18 * KIND, either express or implied.
  19 *
  20 ****************************************************************************/
  21
  22 #ifndef SIMULATOR /* not for simulator by now */
  23 #include "plugin.h"
  24
  25 #ifdef HAVE_LCD_BITMAP /* and also not for the Player */
  26 #include "gray.h"
  27
  28 /******************************* Globals ***********************************/
  29
  30 static struct plugin_api* rb; /* global api struct pointer */
  31 static char pbuf[32];         /* global printf buffer */
  32 static unsigned char *gbuf;
  33 static unsigned int gbuf_size = 0;
  34
  35 /**************************** main function ********************************/
  36
  37 /* this is only a demo of what the framework can do */
  38 int main(void)
  39 {
  40     int shades, time;
  41     int x, y, i;
  42     int button, scroll_amount;
  43     bool black_border;
  44
  45     static unsigned char rockbox[] = {
  46     /* ...........................................
  47      * .####...###...###..#...#.####...###..#...#.
  48      * .#...#.#...#.#...#.#..#..#...#.#...#..#.#..
  49      * .####..#...#.#.....###...####..#...#...#...
  50      * .#..#..#...#.#...#.#..#..#...#.#...#..#.#..
  51      * .#...#..###...###..#...#.####...###..#...#.
  52      * ...........................................
  53      * 43 x 7 pixel, 1 bpp
  54      */
  55        0x00, 0x3E, 0x0A, 0x0A, 0x1A, 0x24, 0x00, 0x1C, 0x22, 0x22,
  56        0x22, 0x1C, 0x00, 0x1C, 0x22, 0x22, 0x22, 0x14, 0x00, 0x3E,
  57        0x08, 0x08, 0x14, 0x22, 0x00, 0x3E, 0x2A, 0x2A, 0x2A, 0x14,
  58        0x00, 0x1C, 0x22, 0x22, 0x22, 0x1C, 0x00, 0x22, 0x14, 0x08,
  59        0x14, 0x22, 0x00
  60     };
  61
  62     static unsigned char showing[] = {
  63     /* .......................................
  64      * ..####.#...#..###..#...#.#.#...#..####.
  65      * .#.....#...#.#...#.#...#.#.##..#.#.....
  66      * ..###..#####.#...#.#.#.#.#.#.#.#.#..##.
  67      * .....#.#...#.#...#.#.#.#.#.#..##.#...#.
  68      * .####..#...#..###...#.#..#.#...#..####.
  69      * .......................................
  70      * 39 x 7 pixel, 1 bpp
  71      */
  72        0x00, 0x24, 0x2A, 0x2A, 0x2A, 0x12, 0x00, 0x3E, 0x08, 0x08,
  73        0x08, 0x3E, 0x00, 0x1C, 0x22, 0x22, 0x22, 0x1C, 0x00, 0x1E,
  74        0x20, 0x18, 0x20, 0x1E, 0x00, 0x3E, 0x00, 0x3E, 0x04, 0x08,
  75        0x10, 0x3E, 0x00, 0x1C, 0x22, 0x22, 0x2A, 0x3A, 0x00
  76     };
  77
  78     static unsigned char grayscale_gray[] = {
  79     /* .......................................................
  80      * ..####.####...###..#...#..####..###...###..#.....#####.
  81      * .#.....#...#.#...#.#...#.#.....#...#.#...#.#.....#.....
  82      * .#..##.####..#####..#.#...###..#.....#####.#.....####..
  83      * .#...#.#..#..#...#...#.......#.#...#.#...#.#.....#.....
  84      * ..####.#...#.#...#...#...####...###..#...#.#####.#####.
  85      * .......................................................
  86      * 55 x 7 pixel, 8 bpp
  87      */
  88        110,110,110,110,110,110,110,110,110,110,110,110,110,110,110,110,
  89        110,110,110,110,110,110,110,110,110,110,110,110,110,110,110,110,
  90        110,110,110,110,110,110,110,110,110,110,110,110,110,110,110,110,
  91        110,110,110,110,110,110,110,
  92        120,120, 20, 20, 20, 20,120,222,222,222,222,120,120,120, 24, 24,
  93         24,120,120,226,120,120,120,226,120,120, 28, 28, 28, 28,120,120,
  94        230,230,230,120,120,120, 32, 32, 32,120,120,234,120,120,120,120,
  95        120, 36, 36, 36, 36, 36,120,
  96        130, 20,130,130,130,130,130,222,130,130,130,222,130, 24,130,130,
  97        130, 24,130,226,130,130,130,226,130, 28,130,130,130,130,130,230,
  98        130,130,130,230,130, 32,130,130,130, 32,130,234,130,130,130,130,
  99        130, 36,130,130,130,130,130,
 100        140, 20,140,140, 20, 20,140,222,222,222,222,140,140, 24, 24, 24,
 101         24, 24,140,140,226,140,226,140,140,140, 28, 28, 28,140,140,230,
 102        140,140,140,140,140, 32, 32, 32, 32, 32,140,234,140,140,140,140,
 103        140, 36, 36, 36, 36,140,140,
 104        130, 20,130,130,130, 20,130,222,130,130,222,130,130, 24,130,130,
 105        130, 24,130,130,130,226,130,130,130,130,130,130,130, 28,130,230,
 106        130,130,130,230,130, 32,130,130,130, 32,130,234,130,130,130,130,
 107        130, 36,130,130,130,130,130,
 108        120,120, 20, 20, 20, 20,120,222,120,120,120,222,120, 24,120,120,
 109        120, 24,120,120,120,226,120,120,120, 28, 28, 28, 28,120,120,120,
 110        230,230,230,120,120, 32,120,120,120, 32,120,234,234,234,234,234,
 111        120, 36, 36, 36, 36, 36,120,
 112        110,110,110,110,110,110,110,110,110,110,110,110,110,110,110,110,
 113        110,110,110,110,110,110,110,110,110,110,110,110,110,110,110,110,
 114        110,110,110,110,110,110,110,110,110,110,110,110,110,110,110,110,
 115        110,110,110,110,110,110,110
 116     };
 117
 118     if (rb->global_settings->backlight_timeout > 0)
 119         rb->backlight_set_timeout(1); /* keep the light on */
 120
 121     rb->lcd_setfont(FONT_SYSFIXED);   /* select default font */
 122
 123     /* get the remainder of the plugin buffer */
 124     gbuf = (unsigned char *) rb->plugin_get_buffer(&gbuf_size);
 125
 126     /* initialize the grayscale buffer:
 127      * 112 pixels wide, 7 rows (56 pixels) high, (try to) reserve
 128      * 32 bitplanes for 33 shades of gray. (uses 25268 bytes)*/
 129     shades = gray_init_buffer(gbuf, gbuf_size, 112, 7, 32, NULL) + 1;
 130
 131     /* place grayscale overlay 1 row down */
 132     gray_position_display(0, 1);
 133
 134     rb->snprintf(pbuf, sizeof(pbuf), "Shades: %d", shades);
 135     rb->lcd_puts(0, 0, pbuf);
 136     rb->lcd_update();
 137
 138     gray_show_display(true);  /* switch on grayscale overlay */
 139
 140     time = *rb->current_tick; /* start time measurement */
 141
 142     gray_fillrect(0, 0, 111, 55, 150); /* fill everything with gray 150 */
 143
 144     /* draw a dark gray line star background */
 145     for (y = 0; y < 56; y += 8)        /* horizontal part */
 146     {
 147         gray_drawline(0, y, 111, 55 - y, 80); /* gray lines */
 148     }
 149     for (x = 10; x < 112; x += 10)     /* vertical part */
 150     {
 151         gray_drawline(x, 0, 111 - x, 55, 80); /* gray lines */
 152     }
 153
 154     gray_drawrect(0, 0, 111, 55, 0);   /* black border */
 155
 156     /* draw gray tones */
 157     for (i = 0; i < 86; i++)
 158     {
 159         x = 13 + i;
 160         gray_fillrect(x, 6, x, 49, 3 * i); /* gray rectangles */
 161     }
 162
 163     gray_invertrect(13, 29, 98, 49);   /* invert rectangle (lower half) */
 164     gray_invertline(13, 27, 98, 27);   /* invert a line */
 165
 166     /* show bitmaps (1 bit and 8 bit) */
 167     gray_drawbitmap(rockbox, 14, 13, 43, 7, 43, true, 255, 100);   /* opaque */
 168     gray_drawbitmap(showing, 58, 13, 39, 7, 39, false, 0, 0); /* transparent */
 169     gray_drawgraymap(grayscale_gray, 28, 35, 55, 7, 55);
 170
 171     time = *rb->current_tick - time;  /* end time measurement */
 172
 173     rb->snprintf(pbuf, sizeof(pbuf), "Shades: %d, %d.%02ds", shades,
 174                  time / 100, time % 100);
 175     rb->lcd_puts(0, 0, pbuf);
 176     gray_deferred_update();             /* schedule an lcd_update() */
 177
 178     /* drawing is now finished, play around with scrolling
 179      * until you press OFF or connect USB
 180      */
 181     while (true)
 182     {
 183         scroll_amount = 1;
 184         black_border = false;
 185
 186         button = rb->button_get(true);
 187
 188         if (button == SYS_USB_CONNECTED)
 189         {
 190             gray_release_buffer(); /* switch off overlay and deinitialize */
 191             /* restore normal backlight setting */
 192             rb->backlight_set_timeout(rb->global_settings->backlight_timeout);
 193             return PLUGIN_USB_CONNECTED;
 194         }
 195
 196         if (button & BUTTON_ON)
 197             black_border = true;
 198
 199         if (button & BUTTON_REPEAT)
 200             scroll_amount = 4;
 201
 202         switch(button & ~(BUTTON_ON | BUTTON_REPEAT))
 203         {
 204             case BUTTON_LEFT:
 205
 206                 gray_scroll_left(scroll_amount, black_border); /* scroll left */
 207                 break;
 208
 209             case BUTTON_RIGHT:
 210
 211                 gray_scroll_right(scroll_amount, black_border); /* scroll right */
 212                 break;
 213
 214             case BUTTON_UP:
 215
 216                 gray_scroll_up(scroll_amount, black_border); /* scroll up */
 217                 break;
 218
 219             case BUTTON_DOWN:
 220
 221                 gray_scroll_down(scroll_amount, black_border); /* scroll down */
 222                 break;
 223
 224             case BUTTON_OFF:
 225
 226                 gray_release_buffer(); /* switch off overlay and deinitialize */
 227                 /* restore normal backlight setting */
 228                 rb->backlight_set_timeout(rb->global_settings->backlight_timeout);
 229                 return PLUGIN_OK;
 230         }
 231     }
 232 }
 233
 234 /*************************** Plugin entry point ****************************/
 235
 236 enum plugin_status plugin_start(struct plugin_api* api, void* parameter)
 237 {
 238     int ret;
 239     /* this macro should be called as the first thing you do in the plugin.
 240     it test that the api version and model the plugin was compiled for
 241     matches the machine it is running on */
 242     TEST_PLUGIN_API(api);
 243
 244     rb = api; // copy to global api pointer
 245     (void)parameter;
 246
 247     /* This plugin uses the grayscale framework, so initialize */
 248     gray_init(api);
 249
 250     ret = main();
 251
 252     if (ret == PLUGIN_USB_CONNECTED)
 253         rb->usb_screen();
 254     return ret;
 255 }
 256
 257 #endif // #ifdef HAVE_LCD_BITMAP
 258 #endif // #ifndef SIMULATOR
 259