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Greyscale library: Preparations for a gamma measurement plugin.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16492 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jens Arnold 2008-03-02 23:31:09 +00:00
parent 8abe9cffe4
commit 8493f5bcf6
12 changed files with 41 additions and 24 deletions
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8
apps/plugins/lib/grey.h
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@ -29,8 +29,10 @@
#if defined(HAVE_LCD_BITMAP) && (LCD_DEPTH < 4)
/* The greyscale lib uses 8 bit brightness values natively on input. */
#define GREY_BRIGHTNESS(y) (y)
/* Some predefined levels for convenience: */
#define GREY_BLACK GREY_BRIGHTNESS(0)
#define GREY_DARKGRAY GREY_BRIGHTNESS(85)
#define GREY_LIGHTGRAY GREY_BRIGHTNESS(170)
@ -42,9 +44,13 @@
#define GREY_INFO_STRUCT struct _grey_info _grey_info;
#define GREY_INFO_STRUCT_IRAM struct _grey_info _grey_info IBSS_ATTR;
/* Features you can request on library init (ORed together): */
#define GREY_BUFFERED 0x0001
#define GREY_RAWMAPPED 0x0002
/* Library initialisation and release */
bool grey_init(struct plugin_api* newrb, unsigned char *gbuf, long gbuf_size,
bool buffered, int width, int height, long *buf_taken);
unsigned features, int width, int height, long *buf_taken);
void grey_release(void);
/* Special functions */