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imageviewer: gif viewer based on giflib-5.0.2

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This adds ability to view gif images in rockbox.
Works both on color and gray/monochrome targets (greylib).
Aspect correction is supported as well.

Limitations:
- animated gifs are restricted to 32 frames
- animated gifs loop always (loopcount is ignored)
- plain text extension is not supported
- animated gifs with interframe delay = 0 are treated as still
  images (web browsers usually treat delay 0 as 100ms to prevent
  exhaustive CPU load by such images)

Change-Id: I61501f801ddcd403410e38d83e6bddc9883e7ede
This commit is contained in:
Marcin Bukat 2012-11-02 13:03:58 +01:00
parent b35f82c91f
commit 0ceaff2b65
23 changed files with 3006 additions and 15 deletions
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3
apps/plugins/imageviewer/jpeg/jpeg.c
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@ -190,8 +190,9 @@ static int load_image(char *filename, struct image_info *info,
return PLUGIN_OK;
}
static int get_image(struct image_info *info, int ds)
static int get_image(struct image_info *info, int frame, int ds)
{
(void)frame;
int w, h; /* used to center output */
int size; /* decompressed image size */
long time; /* measured ticks */