apps/plugins/imageviewer/imageviewer.h

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * user intereface of image viewers (jpeg, png, etc.)
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  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 _IMGVIEW_IMGVIEW_H
  23 #define _IMGVIEW_IMGVIEW_H
  24
  25 #include "plugin.h"
  26
  27 /* variable button definitions */
  28 #if CONFIG_KEYPAD == RECORDER_PAD
  29 #define IMGVIEW_ZOOM_IN     BUTTON_PLAY
  30 #define IMGVIEW_ZOOM_OUT    BUTTON_ON
  31 #define IMGVIEW_UP          BUTTON_UP
  32 #define IMGVIEW_DOWN        BUTTON_DOWN
  33 #define IMGVIEW_LEFT        BUTTON_LEFT
  34 #define IMGVIEW_RIGHT       BUTTON_RIGHT
  35 #define IMGVIEW_NEXT        BUTTON_F3
  36 #define IMGVIEW_PREVIOUS    BUTTON_F2
  37 #define IMGVIEW_MENU        BUTTON_OFF
  38
  39 #elif CONFIG_KEYPAD == ARCHOS_AV300_PAD
  40 #define IMGVIEW_ZOOM_IN     BUTTON_SELECT
  41 #define IMGVIEW_ZOOM_OUT    BUTTON_ON
  42 #define IMGVIEW_UP          BUTTON_UP
  43 #define IMGVIEW_DOWN        BUTTON_DOWN
  44 #define IMGVIEW_LEFT        BUTTON_LEFT
  45 #define IMGVIEW_RIGHT       BUTTON_RIGHT
  46 #define IMGVIEW_NEXT        BUTTON_F3
  47 #define IMGVIEW_PREVIOUS    BUTTON_F2
  48 #define IMGVIEW_MENU        BUTTON_OFF
  49
  50 #elif CONFIG_KEYPAD == ONDIO_PAD
  51 #define IMGVIEW_ZOOM_PRE    BUTTON_MENU
  52 #define IMGVIEW_ZOOM_IN     (BUTTON_MENU | BUTTON_REL)
  53 #define IMGVIEW_ZOOM_OUT    (BUTTON_MENU | BUTTON_DOWN)
  54 #define IMGVIEW_UP          BUTTON_UP
  55 #define IMGVIEW_DOWN        BUTTON_DOWN
  56 #define IMGVIEW_LEFT        BUTTON_LEFT
  57 #define IMGVIEW_RIGHT       BUTTON_RIGHT
  58 #define IMGVIEW_NEXT        (BUTTON_MENU | BUTTON_RIGHT)
  59 #define IMGVIEW_PREVIOUS    (BUTTON_MENU | BUTTON_LEFT)
  60 #define IMGVIEW_MENU        BUTTON_OFF
  61
  62 #elif (CONFIG_KEYPAD == IRIVER_H100_PAD) || \
  63       (CONFIG_KEYPAD == IRIVER_H300_PAD)
  64 #define IMGVIEW_ZOOM_IN     BUTTON_SELECT
  65 #define IMGVIEW_ZOOM_OUT    BUTTON_MODE
  66 #define IMGVIEW_UP          BUTTON_UP
  67 #define IMGVIEW_DOWN        BUTTON_DOWN
  68 #define IMGVIEW_LEFT        BUTTON_LEFT
  69 #define IMGVIEW_RIGHT       BUTTON_RIGHT
  70 #if (CONFIG_KEYPAD == IRIVER_H100_PAD)
  71 #define IMGVIEW_NEXT        BUTTON_ON
  72 #define IMGVIEW_PREVIOUS    BUTTON_REC
  73 #else
  74 #define IMGVIEW_NEXT        BUTTON_REC
  75 #define IMGVIEW_PREVIOUS    BUTTON_ON
  76 #endif
  77 #define IMGVIEW_MENU        BUTTON_OFF
  78 #define IMGVIEW_RC_MENU     BUTTON_RC_STOP
  79
  80 #elif (CONFIG_KEYPAD == IPOD_4G_PAD) || (CONFIG_KEYPAD == IPOD_3G_PAD) || \
  81       (CONFIG_KEYPAD == IPOD_1G2G_PAD)
  82 #define IMGVIEW_ZOOM_IN     BUTTON_SCROLL_FWD
  83 #define IMGVIEW_ZOOM_OUT    BUTTON_SCROLL_BACK
  84 #define IMGVIEW_UP          BUTTON_MENU
  85 #define IMGVIEW_DOWN        BUTTON_PLAY
  86 #define IMGVIEW_LEFT        BUTTON_LEFT
  87 #define IMGVIEW_RIGHT       BUTTON_RIGHT
  88 #define IMGVIEW_NEXT        (BUTTON_SELECT | BUTTON_RIGHT)
  89 #define IMGVIEW_PREVIOUS    (BUTTON_SELECT | BUTTON_LEFT)
  90 #define IMGVIEW_MENU        (BUTTON_SELECT | BUTTON_MENU)
  91
  92 #elif CONFIG_KEYPAD == IAUDIO_X5M5_PAD
  93 #define IMGVIEW_ZOOM_PRE    BUTTON_SELECT
  94 #define IMGVIEW_ZOOM_IN     (BUTTON_SELECT | BUTTON_REL)
  95 #define IMGVIEW_ZOOM_OUT    (BUTTON_SELECT | BUTTON_REPEAT)
  96 #define IMGVIEW_UP          BUTTON_UP
  97 #define IMGVIEW_DOWN        BUTTON_DOWN
  98 #define IMGVIEW_LEFT        BUTTON_LEFT
  99 #define IMGVIEW_RIGHT       BUTTON_RIGHT
 100 #define IMGVIEW_NEXT        BUTTON_PLAY
 101 #define IMGVIEW_PREVIOUS    BUTTON_REC
 102 #define IMGVIEW_MENU        BUTTON_POWER
 103
 104 #elif CONFIG_KEYPAD == GIGABEAT_PAD
 105 #define IMGVIEW_ZOOM_IN     BUTTON_VOL_UP
 106 #define IMGVIEW_ZOOM_OUT    BUTTON_VOL_DOWN
 107 #define IMGVIEW_UP          BUTTON_UP
 108 #define IMGVIEW_DOWN        BUTTON_DOWN
 109 #define IMGVIEW_LEFT        BUTTON_LEFT
 110 #define IMGVIEW_RIGHT       BUTTON_RIGHT
 111 #define IMGVIEW_NEXT        (BUTTON_A | BUTTON_RIGHT)
 112 #define IMGVIEW_PREVIOUS    (BUTTON_A | BUTTON_LEFT)
 113 #define IMGVIEW_MENU        BUTTON_MENU
 114
 115 #elif CONFIG_KEYPAD == SANSA_E200_PAD
 116 #define IMGVIEW_ZOOM_PRE        BUTTON_SELECT
 117 #define IMGVIEW_ZOOM_IN         (BUTTON_SELECT | BUTTON_REL)
 118 #define IMGVIEW_ZOOM_OUT        (BUTTON_SELECT | BUTTON_REPEAT)
 119 #define IMGVIEW_UP              BUTTON_UP
 120 #define IMGVIEW_DOWN            BUTTON_DOWN
 121 #define IMGVIEW_LEFT            BUTTON_LEFT
 122 #define IMGVIEW_RIGHT           BUTTON_RIGHT
 123 #define IMGVIEW_NEXT            BUTTON_SCROLL_FWD
 124 #define IMGVIEW_NEXT_REPEAT     (BUTTON_SCROLL_FWD|BUTTON_REPEAT)
 125 #define IMGVIEW_PREVIOUS        BUTTON_SCROLL_BACK
 126 #define IMGVIEW_PREVIOUS_REPEAT (BUTTON_SCROLL_BACK|BUTTON_REPEAT)
 127 #define IMGVIEW_MENU            BUTTON_POWER
 128 #define IMGVIEW_SLIDE_SHOW      BUTTON_REC
 129
 130 #elif CONFIG_KEYPAD == SANSA_FUZE_PAD
 131 #define IMGVIEW_ZOOM_PRE        BUTTON_SELECT
 132 #define IMGVIEW_ZOOM_IN         (BUTTON_SELECT | BUTTON_REL)
 133 #define IMGVIEW_ZOOM_OUT        (BUTTON_SELECT | BUTTON_REPEAT)
 134 #define IMGVIEW_UP              BUTTON_UP
 135 #define IMGVIEW_DOWN            BUTTON_DOWN
 136 #define IMGVIEW_LEFT            BUTTON_LEFT
 137 #define IMGVIEW_RIGHT           BUTTON_RIGHT
 138 #define IMGVIEW_NEXT            BUTTON_SCROLL_FWD
 139 #define IMGVIEW_NEXT_REPEAT     (BUTTON_SCROLL_FWD|BUTTON_REPEAT)
 140 #define IMGVIEW_PREVIOUS        BUTTON_SCROLL_BACK
 141 #define IMGVIEW_PREVIOUS_REPEAT (BUTTON_SCROLL_BACK|BUTTON_REPEAT)
 142 #define IMGVIEW_MENU            (BUTTON_HOME|BUTTON_REPEAT)
 143
 144 #elif CONFIG_KEYPAD == SANSA_C200_PAD
 145 #define IMGVIEW_ZOOM_PRE        BUTTON_SELECT
 146 #define IMGVIEW_ZOOM_IN         (BUTTON_SELECT | BUTTON_REL)
 147 #define IMGVIEW_ZOOM_OUT        (BUTTON_SELECT | BUTTON_REPEAT)
 148 #define IMGVIEW_UP              BUTTON_UP
 149 #define IMGVIEW_DOWN            BUTTON_DOWN
 150 #define IMGVIEW_LEFT            BUTTON_LEFT
 151 #define IMGVIEW_RIGHT           BUTTON_RIGHT
 152 #define IMGVIEW_NEXT            BUTTON_VOL_UP
 153 #define IMGVIEW_NEXT_REPEAT     (BUTTON_VOL_UP|BUTTON_REPEAT)
 154 #define IMGVIEW_PREVIOUS        BUTTON_VOL_DOWN
 155 #define IMGVIEW_PREVIOUS_REPEAT (BUTTON_VOL_DOWN|BUTTON_REPEAT)
 156 #define IMGVIEW_MENU            BUTTON_POWER
 157 #define IMGVIEW_SLIDE_SHOW      BUTTON_REC
 158
 159 #elif CONFIG_KEYPAD == SANSA_CLIP_PAD
 160 #define IMGVIEW_ZOOM_PRE        BUTTON_SELECT
 161 #define IMGVIEW_ZOOM_IN         (BUTTON_SELECT | BUTTON_REL)
 162 #define IMGVIEW_ZOOM_OUT        (BUTTON_SELECT | BUTTON_REPEAT)
 163 #define IMGVIEW_UP              BUTTON_UP
 164 #define IMGVIEW_DOWN            BUTTON_DOWN
 165 #define IMGVIEW_LEFT            BUTTON_LEFT
 166 #define IMGVIEW_RIGHT           BUTTON_RIGHT
 167 #define IMGVIEW_NEXT            BUTTON_VOL_UP
 168 #define IMGVIEW_NEXT_REPEAT     (BUTTON_VOL_UP|BUTTON_REPEAT)
 169 #define IMGVIEW_PREVIOUS        BUTTON_VOL_DOWN
 170 #define IMGVIEW_PREVIOUS_REPEAT (BUTTON_VOL_DOWN|BUTTON_REPEAT)
 171 #define IMGVIEW_MENU            BUTTON_POWER
 172 #define IMGVIEW_SLIDE_SHOW      BUTTON_HOME
 173
 174 #elif CONFIG_KEYPAD == SANSA_M200_PAD
 175 #define IMGVIEW_ZOOM_PRE        BUTTON_SELECT
 176 #define IMGVIEW_ZOOM_IN         (BUTTON_SELECT | BUTTON_REL)
 177 #define IMGVIEW_ZOOM_OUT        (BUTTON_SELECT | BUTTON_REPEAT)
 178 #define IMGVIEW_UP              BUTTON_UP
 179 #define IMGVIEW_DOWN            BUTTON_DOWN
 180 #define IMGVIEW_LEFT            BUTTON_LEFT
 181 #define IMGVIEW_RIGHT           BUTTON_RIGHT
 182 #define IMGVIEW_NEXT            BUTTON_VOL_UP
 183 #define IMGVIEW_NEXT_REPEAT     (BUTTON_VOL_UP|BUTTON_REPEAT)
 184 #define IMGVIEW_PREVIOUS        BUTTON_VOL_DOWN
 185 #define IMGVIEW_PREVIOUS_REPEAT (BUTTON_VOL_DOWN|BUTTON_REPEAT)
 186 #define IMGVIEW_MENU            BUTTON_POWER
 187 #define IMGVIEW_SLIDE_SHOW      (BUTTON_SELECT | BUTTON_UP)
 188
 189 #elif CONFIG_KEYPAD == IRIVER_H10_PAD
 190 #define IMGVIEW_ZOOM_PRE    BUTTON_PLAY
 191 #define IMGVIEW_ZOOM_IN     (BUTTON_PLAY | BUTTON_REL)
 192 #define IMGVIEW_ZOOM_OUT    (BUTTON_PLAY | BUTTON_REPEAT)
 193 #define IMGVIEW_UP          BUTTON_SCROLL_UP
 194 #define IMGVIEW_DOWN        BUTTON_SCROLL_DOWN
 195 #define IMGVIEW_LEFT        BUTTON_LEFT
 196 #define IMGVIEW_RIGHT       BUTTON_RIGHT
 197 #define IMGVIEW_NEXT        BUTTON_FF
 198 #define IMGVIEW_PREVIOUS    BUTTON_REW
 199 #define IMGVIEW_MENU        BUTTON_POWER
 200
 201 #elif CONFIG_KEYPAD == MROBE500_PAD
 202 #define IMGVIEW_MENU        BUTTON_POWER
 203
 204 #elif CONFIG_KEYPAD == GIGABEAT_S_PAD
 205 #define IMGVIEW_ZOOM_IN     BUTTON_VOL_UP
 206 #define IMGVIEW_ZOOM_OUT    BUTTON_VOL_DOWN
 207 #define IMGVIEW_UP          BUTTON_UP
 208 #define IMGVIEW_DOWN        BUTTON_DOWN
 209 #define IMGVIEW_LEFT        BUTTON_LEFT
 210 #define IMGVIEW_RIGHT       BUTTON_RIGHT
 211 #define IMGVIEW_NEXT        BUTTON_NEXT
 212 #define IMGVIEW_PREVIOUS    BUTTON_PREV
 213 #define IMGVIEW_MENU        BUTTON_MENU
 214
 215 #elif CONFIG_KEYPAD == MROBE100_PAD
 216 #define IMGVIEW_ZOOM_IN     BUTTON_SELECT
 217 #define IMGVIEW_ZOOM_OUT    BUTTON_PLAY
 218 #define IMGVIEW_UP          BUTTON_UP
 219 #define IMGVIEW_DOWN        BUTTON_DOWN
 220 #define IMGVIEW_LEFT        BUTTON_LEFT
 221 #define IMGVIEW_RIGHT       BUTTON_RIGHT
 222 #define IMGVIEW_NEXT        (BUTTON_DISPLAY | BUTTON_RIGHT)
 223 #define IMGVIEW_PREVIOUS    (BUTTON_DISPLAY | BUTTON_LEFT)
 224 #define IMGVIEW_MENU        BUTTON_MENU
 225
 226 #elif CONFIG_KEYPAD == IAUDIO_M3_PAD
 227 #define IMGVIEW_ZOOM_PRE    BUTTON_RC_PLAY
 228 #define IMGVIEW_ZOOM_IN     (BUTTON_RC_PLAY|BUTTON_REL)
 229 #define IMGVIEW_ZOOM_OUT    (BUTTON_RC_PLAY|BUTTON_REPEAT)
 230 #define IMGVIEW_UP          BUTTON_RC_VOL_UP
 231 #define IMGVIEW_DOWN        BUTTON_RC_VOL_DOWN
 232 #define IMGVIEW_LEFT        BUTTON_RC_REW
 233 #define IMGVIEW_RIGHT       BUTTON_RC_FF
 234 #define IMGVIEW_NEXT        BUTTON_RC_MODE
 235 #define IMGVIEW_PREVIOUS    BUTTON_RC_MENU
 236 #define IMGVIEW_MENU        BUTTON_RC_REC
 237
 238 #elif CONFIG_KEYPAD == COWON_D2_PAD
 239
 240 #elif CONFIG_KEYPAD == IAUDIO67_PAD
 241 #define IMGVIEW_ZOOM_IN     BUTTON_VOLUP
 242 #define IMGVIEW_ZOOM_OUT    BUTTON_VOLDOWN
 243 #define IMGVIEW_UP          BUTTON_STOP
 244 #define IMGVIEW_DOWN        BUTTON_PLAY
 245 #define IMGVIEW_LEFT        BUTTON_LEFT
 246 #define IMGVIEW_RIGHT       BUTTON_RIGHT
 247 #define IMGVIEW_NEXT        (BUTTON_PLAY|BUTTON_VOLUP)
 248 #define IMGVIEW_PREVIOUS    (BUTTON_PLAY|BUTTON_VOLDOWN)
 249 #define IMGVIEW_MENU        BUTTON_MENU
 250
 251 #elif CONFIG_KEYPAD == CREATIVEZVM_PAD
 252
 253 #define IMGVIEW_ZOOM_IN     BUTTON_PLAY
 254 #define IMGVIEW_ZOOM_OUT    BUTTON_CUSTOM
 255 #define IMGVIEW_UP          BUTTON_UP
 256 #define IMGVIEW_DOWN        BUTTON_DOWN
 257 #define IMGVIEW_LEFT        BUTTON_LEFT
 258 #define IMGVIEW_RIGHT       BUTTON_RIGHT
 259 #define IMGVIEW_NEXT        BUTTON_SELECT
 260 #define IMGVIEW_PREVIOUS    BUTTON_BACK
 261 #define IMGVIEW_MENU        BUTTON_MENU
 262
 263 #elif CONFIG_KEYPAD == PHILIPS_HDD1630_PAD
 264 #define IMGVIEW_ZOOM_IN     BUTTON_VOL_UP
 265 #define IMGVIEW_ZOOM_OUT    BUTTON_VOL_DOWN
 266 #define IMGVIEW_UP          BUTTON_UP
 267 #define IMGVIEW_DOWN        BUTTON_DOWN
 268 #define IMGVIEW_LEFT        BUTTON_LEFT
 269 #define IMGVIEW_RIGHT       BUTTON_RIGHT
 270 #define IMGVIEW_NEXT        BUTTON_VIEW
 271 #define IMGVIEW_PREVIOUS    BUTTON_PLAYLIST
 272 #define IMGVIEW_MENU        BUTTON_MENU
 273
 274 #elif CONFIG_KEYPAD == PHILIPS_SA9200_PAD
 275 #define IMGVIEW_ZOOM_IN     BUTTON_VOL_UP
 276 #define IMGVIEW_ZOOM_OUT    BUTTON_VOL_DOWN
 277 #define IMGVIEW_UP          BUTTON_UP
 278 #define IMGVIEW_DOWN        BUTTON_DOWN
 279 #define IMGVIEW_LEFT        BUTTON_PREV
 280 #define IMGVIEW_RIGHT       BUTTON_NEXT
 281 #define IMGVIEW_NEXT        BUTTON_RIGHT
 282 #define IMGVIEW_PREVIOUS    BUTTON_LEFT
 283 #define IMGVIEW_MENU        BUTTON_MENU
 284
 285 #elif CONFIG_KEYPAD == ONDAVX747_PAD
 286 #elif CONFIG_KEYPAD == ONDAVX777_PAD
 287
 288 #elif CONFIG_KEYPAD == SAMSUNG_YH_PAD
 289 #define IMGVIEW_ZOOM_IN     (BUTTON_PLAY|BUTTON_UP)
 290 #define IMGVIEW_ZOOM_OUT    (BUTTON_PLAY|BUTTON_DOWN)
 291 #define IMGVIEW_UP          BUTTON_UP
 292 #define IMGVIEW_DOWN        BUTTON_DOWN
 293 #define IMGVIEW_LEFT        BUTTON_LEFT
 294 #define IMGVIEW_RIGHT       BUTTON_RIGHT
 295 #define IMGVIEW_NEXT        BUTTON_FFWD
 296 #define IMGVIEW_PREVIOUS    BUTTON_REW
 297 #define IMGVIEW_MENU        BUTTON_PLAY
 298
 299 #else
 300 #error No keymap defined!
 301 #endif
 302
 303 #ifdef HAVE_TOUCHSCREEN
 304 #ifndef IMGVIEW_UP
 305 #define IMGVIEW_UP          BUTTON_TOPMIDDLE
 306 #endif
 307 #ifndef IMGVIEW_DOWN
 308 #define IMGVIEW_DOWN        BUTTON_BOTTOMMIDDLE
 309 #endif
 310 #ifndef IMGVIEW_LEFT
 311 #define IMGVIEW_LEFT        BUTTON_MIDLEFT
 312 #endif
 313 #ifndef IMGVIEW_RIGHT
 314 #define IMGVIEW_RIGHT       BUTTON_MIDRIGHT
 315 #endif
 316 #ifndef IMGVIEW_ZOOM_IN
 317 #define IMGVIEW_ZOOM_IN     BUTTON_TOPRIGHT
 318 #endif
 319 #ifndef IMGVIEW_ZOOM_OUT
 320 #define IMGVIEW_ZOOM_OUT    BUTTON_TOPLEFT
 321 #endif
 322 #ifndef IMGVIEW_MENU
 323 #define IMGVIEW_MENU        (BUTTON_CENTER|BUTTON_REL)
 324 #endif
 325 #ifndef IMGVIEW_NEXT
 326 #define IMGVIEW_NEXT        BUTTON_BOTTOMRIGHT
 327 #endif
 328 #ifndef IMGVIEW_PREVIOUS
 329 #define IMGVIEW_PREVIOUS    BUTTON_BOTTOMLEFT
 330 #endif
 331 #endif
 332
 333 /* different graphics libraries */
 334 #if LCD_DEPTH < 8
 335 #define USEGSLIB
 336 #include <lib/grey.h>
 337 #define MYLCD(fn) grey_ub_ ## fn
 338 #define MYLCD_UPDATE()
 339 #define MYXLCD(fn) grey_ub_ ## fn
 340 #else
 341 #include <lib/xlcd.h>
 342 #define MYLCD(fn) rb->lcd_ ## fn
 343 #define MYLCD_UPDATE() rb->lcd_update();
 344 #define MYXLCD(fn) xlcd_ ## fn
 345 #endif
 346
 347 /* Min memory allowing us to use the plugin buffer
 348  * and thus not stopping the music
 349  * *Very* rough estimation:
 350  * Max 10 000 dir entries * 4bytes/entry (char **) = 40000 bytes
 351  * + 30k code size = 70 000
 352  * + 50k min for image = 120 000
 353  */
 354 #define MIN_MEM 120000
 355
 356 /* State code for output with return. */
 357 #define PLUGIN_OTHER    10
 358 #define PLUGIN_ABORT    11
 359 #define PLUGIN_OUTOFMEM 12
 360
 361 #if !defined(SIMULATOR) && defined(HAVE_DISK_STORAGE)
 362 #define DISK_SPINDOWN
 363 #endif
 364
 365 /* Settings. jpeg needs these */
 366 struct imgview_settings
 367 {
 368     /* include all settings for varias decoders as using same setting file. */
 369 #ifdef HAVE_LCD_COLOR
 370     int jpeg_colour_mode;
 371     int jpeg_dither_mode;
 372 #endif
 373     int ss_timeout;
 374 };
 375
 376 /* structure passed to decoder. */
 377 struct image_info {
 378     int x_size, y_size; /* set size of loaded image in load_image(). */
 379     int width, height;  /* set size of resized image in get_image(). */
 380     int x, y;           /* display position */
 381     void *data;         /* use freely in decoder. not touched in ui. */
 382 };
 383
 384 /* callback updating a progress meter while image decoding */
 385 extern void cb_progress(int current, int total);
 386
 387 extern struct imgview_settings settings;
 388 extern bool slideshow_enabled;
 389 extern bool running_slideshow;
 390 #ifdef DISK_SPINDOWN
 391 extern bool immediate_ata_off;
 392 #endif
 393 #if PLUGIN_BUFFER_SIZE >= MIN_MEM
 394 extern bool plug_buf;
 395 #endif
 396
 397 /* functions need to be implemented in each image decoders. */
 398 /* return true if ext is supported by the decoder. */
 399 extern bool img_ext(const char *ext);
 400 /* return needed size of buffer to store downscaled image by ds */
 401 extern int img_mem(int ds);
 402 /* load image from filename. set width and height of info properly. also, set
 403  * buf_size to remaining size of buf after load image. it is used to caluclate
 404  * min downscale. */
 405 extern int load_image(char *filename, struct image_info *info,
 406                       unsigned char *buf, ssize_t *buf_size);
 407 /* downscale loaded image by ds. note that buf to store reszied image is not
 408  * provided. return PLUGIN_ERROR for error. ui will skip to next image. */
 409 extern int get_image(struct image_info *info, int ds);
 410 /* draw part of image */
 411 extern void draw_image_rect(struct image_info *info,
 412                             int x, int y, int width, int height);
 413
 414 #endif /* _IMGVIEW_IMGVIEW_H */