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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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14
apps/plugins/imageviewer/jpegp/GETC.h
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@ -37,20 +37,20 @@
// For decoders
extern int GETC();
extern int GETC(void);
// Multibyte helpers
extern int GETWbi(); // read word (16-bit) big-endian
extern int GETWli(); // little-endian
extern int GETDbi(); // read double word (32-bit) big-endian
extern int GETDli(); // little-endian
extern int GETWbi(void); // read word (16-bit) big-endian
extern int GETWli(void); // little-endian
extern int GETDbi(void); // read double word (32-bit) big-endian
extern int GETDli(void); // little-endian
// positioning
extern void SEEK(int); // move relative to current
extern void POS(int); // move absolute position (TIFF)
extern int TELL(); // read actual position
extern int TELL(void); // read actual position
// For RAINBOW clients to implement outside of Rainbow Library
extern void *OPEN(char*);
extern void CLOSE();
extern void CLOSE(void);