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imageviewer: Initial support for JPEG progressive images. Add decoder

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Added jpeg decoder jpegp.c using RAINBOW lib. Currently enabled only for pictures not supported by old decoder (as old decoder more optimized for low mem targets)

Someone TODO:
 * Old decoder has optimized downscale logic which new decoder doesn't have (it gives big difference in required memory and time for decoding). This logic should be ported/adapted if possible.

 * Add smooth downscaling.

 * Grayscale support

Change-Id: Ie96bc62848b51cc6a3942f8e069ec6ab02dc1c56
This commit is contained in:
Roman Artiukhin 2024-10-09 19:39:15 +03:00 • committed by Solomon Peachy
parent 64ad7354b6
commit b8238f7b20
19 changed files with 599 additions and 22 deletions
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4
apps/plugins/imageviewer/jpeg/jpeg.c
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@ -170,8 +170,12 @@ static int load_image(char *filename, struct image_info *info,
if (status < 0 || (status & (DQT | SOF0)) != (DQT | SOF0))
{ /* bad format or minimum components not contained */
#ifndef HAVE_LCD_COLOR
rb->splashf(HZ, "unsupported %d", status);
return PLUGIN_ERROR;
#else
return PLUGIN_JPEG_PROGRESSIVE;
#endif
}
if (!(status & DHT)) /* if no Huffman table present: */