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, const 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, const 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, const 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, const i_color *color,
30 extern int i_setcolors_forward(i_img *im, int index, const i_color *colors,
33 #define SampleFTo16(num) ((int)((num) * 65535.0 + 0.01))
34 /* we add that little bit to avoid rounding issues */
35 #define Sample16ToF(num) ((num) / 65535.0)
37 #define SampleFTo8(num) ((int)((num) * 255.0 + 0.01))
38 #define Sample8ToF(num) ((num) / 255.0)
40 #define Sample16To8(num) ((num) / 257)
41 #define Sample8To16(num) ((num) * 257)
43 extern void i_get_combine(int combine, i_fill_combine_f *, i_fill_combinef_f *);
46 i_int_check_image_file_limits(int width, int height, int channels, int sample_size);
48 #define im_min(a, b) ((a) < (b) ? (a) : (b))
49 #define im_max(a, b) ((a) > (b) ? (a) : (b))
53 extern UTIL_table_t i_UTIL_table;
55 /* Ideally this will move into imconfig.h if we ever probe */
56 #if defined(_GNU_SOURCE) || __STDC_VERSION__ >= 199901L
57 /* snprintf() is part of C99 and provided by Glibc */
61 /* test if all channels are writable */
62 #define I_ALL_CHANNELS_WRITABLE(im) (((im)->ch_mask & 0xF) == 0xf)
64 typedef struct i_int_hline_seg_tag {
68 typedef struct i_int_hline_entry_tag {
71 i_int_hline_seg segs[1];
74 /* represents a set of horizontal line segments to be filled in later */
75 typedef struct i_int_hlines_tag {
78 i_int_hline_entry **entries;
89 extern void i_int_init_hlines_img(i_int_hlines *hlines, i_img *img);
90 extern void i_int_hlines_add(i_int_hlines *hlines, int y, int minx, int width);
91 extern void i_int_hlines_destroy(i_int_hlines *hlines);
93 extern void i_int_hlines_fill_color(i_img *im, i_int_hlines *hlines, const i_color *val);
94 extern void i_int_hlines_fill_fill(i_img *im, i_int_hlines *hlines, i_fill_t *fill);