1 /* Declares utility functions useful across various files which
2 aren't meant to be available externally
10 /* wrapper functions that implement the floating point sample version of a
11 function in terms of the 8-bit sample version
13 extern int i_ppixf_fp(i_img *im, int x, int y, i_fcolor *pix);
14 extern int i_gpixf_fp(i_img *im, int x, int y, i_fcolor *pix);
15 extern int i_plinf_fp(i_img *im, int l, int r, int y, i_fcolor *pix);
16 extern int i_glinf_fp(i_img *im, int l, int r, int y, i_fcolor *pix);
17 extern int i_gsampf_fp(i_img *im, int l, int r, int y, i_fsample_t *samp,
18 int const *chans, int chan_count);
20 /* wrapper functions that forward palette calls to the underlying image,
21 assuming the underlying image is the first pointer in whatever
24 extern int i_addcolors_forward(i_img *im, i_color *, int count);
25 extern int i_getcolors_forward(i_img *im, int i, i_color *, int count);
26 extern int i_colorcount_forward(i_img *im);
27 extern int i_maxcolors_forward(i_img *im);
28 extern int i_findcolor_forward(i_img *im, i_color *color, i_palidx *entry);
29 extern int i_setcolors_forward(i_img *im, int index, i_color *colors,
32 #define SampleFTo16(num) ((int)((num) * 65535.0 + 0.01))
33 /* we add that little bit to avoid rounding issues */
34 #define Sample16ToF(num) ((num) / 65535.0)
36 #define SampleFTo8(num) ((int)((num) * 255.0 + 0.01))
37 #define Sample8ToF(num) ((num) / 255.0)
39 #define Sample16To8(num) ((num) / 257)
40 #define Sample8To16(num) ((num) * 257)
42 extern void i_get_combine(int combine, i_fill_combine_f *, i_fill_combinef_f *);
46 extern UTIL_table_t i_UTIL_table;
48 /* Ideally this will move into imconfig.h if we ever probe */
49 #if defined(_GNU_SOURCE) || __STDC_VERSION__ >= 199901L
50 /* snprintf() is part of C99 and provided by Glibc */